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diff --git a/po/Makevars b/po/Makevars
index 90b0c5b83..20d6ae9d6 100644
--- a/po/Makevars
+++ b/po/Makevars
@@ -1,97 +1,98 @@
# Makefile variables for PO directory in any package using GNU gettext.
# Usually the message domain is the same as the package name.
DOMAIN = gnupg2
# These two variables depend on the location of this directory.
subdir = po
top_builddir = ..
# These options get passed to xgettext.
XGETTEXT_OPTIONS = \
--keyword=_ --keyword=N_ --keyword=L_ \
--flag=gcry_log_debug:1:c-format \
--flag=gpgrt_fprintf:2:c-format \
--flag=gpgrt_fprintf_unlocked:2:c-format \
--flag=gpgrt_printf:1:c-format \
--flag=gpgrt_printf_unlocked:1:c-format \
--flag=gpgrt_vfprintf:2:c-format \
--flag=gpgrt_vfprintf_unlocked:2:c-format \
--flag=gpgrt_asprintf:2:c-format \
--flag=gpgrt_vasprintf:2:c-format \
--flag=gpgrt_bsprintf:1:c-format \
--flag=gpgrt_vbsprintf:1:c-format \
--flag=gpgrt_snprintf:3:c-format \
--flag=gpgrt_vsnprintf:3:c-format \
--flag=gpgrt_log:2:c-format \
--flag=gpgrt_log_bug:1:c-format \
--flag=gpgrt_log_fatal:1:c-format \
--flag=gpgrt_log_error:1:c-format \
--flag=gpgrt_log_info:1:c-format \
--flag=gpgrt_log_debug:1:c-format \
--flag=gpgrt_log_debug_string:2:c-format \
--flag=gpgrt_log_printf:1:c-format \
--flag=gpgrt_log_printhex:3:c-format \
--flag=gpgrt_log_clock:1:c-format \
--flag=log_log:2:c-format \
--flag=log_bug:1:c-format \
--flag=log_fatal:1:c-format \
--flag=log_error:1:c-format \
--flag=log_info:1:c-format \
--flag=log_debug:1:c-format \
--flag=log_debug_string:2:c-format \
--flag=log_printf:1:c-format \
--flag=log_printhex:3:c-format \
--flag=log_clock:1:c-format
--flag=put_membuf_printf:2:c-format \
--flag=tty_printf:1:c-format \
--flag=tty_fprintf:2:c-format \
--flag=tty_getf:1:c-format \
--flag=writeout_para:2:c-format \
--flag=writeout_li:3:c-format \
--flag=writeout_rem:2:c-format \
--flag=xasprintf:1:c-format \
--flag=xtryasprintf:1:c-format \
--flag=log_debug_with_string:2:c-format \
--flag=print_assuan_status:3:c-format \
--flag=vprint_assuan_status:3:c-format \
--flag=agent_print_status:3:c-format \
--flag=dirmngr_status_helpf:2:c-format \
--flag=dirmngr_status_printf:3:c-format \
--flag=ks_printf_help:2:c-format \
--flag=print_further_info:1:c-format \
--flag=write_status_printf:2:c-format \
--flag=kbxd_print_status:3:c-format \
--flag=gpgconf_write_status:2:c-format \
+ --flag=send_status_printf:3:c-format \
--flag=wks_write_status:2:c-format
# This is the copyright holder that gets inserted into the header of the
# $(DOMAIN).pot file. Set this to the copyright holder of the surrounding
# package. (Note that the msgstr strings, extracted from the package's
# sources, belong to the copyright holder of the package.) Translators are
# expected to transfer the copyright for their translations to this person
# or entity, or to disclaim their copyright. The empty string stands for
# the public domain; in this case the translators are expected to disclaim
# their copyright.
COPYRIGHT_HOLDER = Free Software Foundation, Inc.
# This is the email address or URL to which the translators shall report
# bugs in the untranslated strings:
# - Strings which are not entire sentences, see the maintainer guidelines
# in the GNU gettext documentation, section 'Preparing Strings'.
# - Strings which use unclear terms or require additional context to be
# understood.
# - Strings which make invalid assumptions about notation of date, time or
# money.
# - Pluralisation problems.
# - Incorrect English spelling.
# - Incorrect formatting.
# It can be your email address, or a mailing list address where translators
# can write to without being subscribed, or the URL of a web page through
# which the translators can contact you.
MSGID_BUGS_ADDRESS = translations@gnupg.org
# This is the list of locale categories, beyond LC_MESSAGES, for which the
# message catalogs shall be used. It is usually empty.
EXTRA_LOCALE_CATEGORIES =
diff --git a/scd/app-common.h b/scd/app-common.h
index ff583183a..b1661b524 100644
--- a/scd/app-common.h
+++ b/scd/app-common.h
@@ -1,213 +1,214 @@
/* app-common.h - Common declarations for all card applications
* Copyright (C) 2003, 2005, 2008 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*
* $Id$
*/
#ifndef GNUPG_SCD_APP_COMMON_H
#define GNUPG_SCD_APP_COMMON_H
#include <npth.h>
#include <ksba.h>
-#define APP_CHANGE_FLAG_RESET 1
-#define APP_CHANGE_FLAG_NULLPIN 2
+#define APP_CHANGE_FLAG_RESET 1 /* PIN Reset mode. */
+#define APP_CHANGE_FLAG_NULLPIN 2 /* NULL PIN mode. */
+#define APP_CHANGE_FLAG_CLEAR 4 /* Clear the given PIN. */
/* Bit flags set by the decipher function into R_INFO. */
#define APP_DECIPHER_INFO_NOPAD 1 /* Padding has been removed. */
struct app_local_s; /* Defined by all app-*.c. */
struct app_ctx_s {
struct app_ctx_s *next;
npth_mutex_t lock;
/* Number of connections currently using this application context.
If this is not 0 the application has been initialized and the
function pointers may be used. Note that for unsupported
operations the particular function pointer is set to NULL */
unsigned int ref_count;
/* Used reader slot. */
int slot;
unsigned char *serialno; /* Serialnumber in raw form, allocated. */
size_t serialnolen; /* Length in octets of serialnumber. */
const char *apptype;
unsigned int card_version;
unsigned int card_status;
unsigned int reset_requested:1;
unsigned int periodical_check_needed:1;
unsigned int did_chv1:1;
unsigned int force_chv1:1; /* True if the card does not cache CHV1. */
unsigned int did_chv2:1;
unsigned int did_chv3:1;
struct app_local_s *app_local; /* Local to the application. */
struct {
void (*deinit) (app_t app);
gpg_error_t (*learn_status) (app_t app, ctrl_t ctrl, unsigned int flags);
gpg_error_t (*readcert) (app_t app, const char *certid,
unsigned char **cert, size_t *certlen);
gpg_error_t (*readkey) (app_t app, int advanced, const char *certid,
unsigned char **pk, size_t *pklen);
gpg_error_t (*getattr) (app_t app, ctrl_t ctrl, const char *name);
gpg_error_t (*setattr) (app_t app, const char *name,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const unsigned char *value, size_t valuelen);
gpg_error_t (*sign) (app_t app,
const char *keyidstr, int hashalgo,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen );
gpg_error_t (*auth) (app_t app, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen);
gpg_error_t (*decipher) (app_t app, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen,
unsigned int *r_info);
gpg_error_t (*writecert) (app_t app, ctrl_t ctrl,
const char *certid,
gpg_error_t (*pincb)(void*,const char *,char **),
void *pincb_arg,
const unsigned char *data, size_t datalen);
gpg_error_t (*writekey) (app_t app, ctrl_t ctrl,
const char *keyid, unsigned int flags,
gpg_error_t (*pincb)(void*,const char *,char **),
void *pincb_arg,
const unsigned char *pk, size_t pklen);
gpg_error_t (*genkey) (app_t app, ctrl_t ctrl,
const char *keynostr, unsigned int flags,
time_t createtime,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg);
gpg_error_t (*change_pin) (app_t app, ctrl_t ctrl,
const char *chvnostr, unsigned int flags,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg);
gpg_error_t (*check_pin) (app_t app, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg);
} fnc;
};
/*-- app-help.c --*/
unsigned int app_help_count_bits (const unsigned char *a, size_t len);
gpg_error_t app_help_get_keygrip_string (ksba_cert_t cert, char *hexkeygrip);
size_t app_help_read_length_of_cert (int slot, int fid, size_t *r_certoff);
/*-- app.c --*/
void app_send_card_list (ctrl_t ctrl);
char *app_get_serialno (app_t app);
void app_dump_state (void);
void application_notify_card_reset (int slot);
gpg_error_t check_application_conflict (const char *name, app_t app);
gpg_error_t app_reset (app_t app, ctrl_t ctrl, int send_reset);
gpg_error_t select_application (ctrl_t ctrl, const char *name, app_t *r_app,
int scan, const unsigned char *serialno_bin,
size_t serialno_bin_len);
char *get_supported_applications (void);
void release_application (app_t app, int locked_already);
gpg_error_t app_munge_serialno (app_t app);
gpg_error_t app_write_learn_status (app_t app, ctrl_t ctrl,
unsigned int flags);
gpg_error_t app_readcert (app_t app, ctrl_t ctrl, const char *certid,
unsigned char **cert, size_t *certlen);
gpg_error_t app_readkey (app_t app, ctrl_t ctrl, int advanced,
const char *keyid, unsigned char **pk, size_t *pklen);
gpg_error_t app_getattr (app_t app, ctrl_t ctrl, const char *name);
gpg_error_t app_setattr (app_t app, ctrl_t ctrl, const char *name,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const unsigned char *value, size_t valuelen);
gpg_error_t app_sign (app_t app, ctrl_t ctrl, const char *keyidstr, int hashalgo,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen );
gpg_error_t app_auth (app_t app, ctrl_t ctrl, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen);
gpg_error_t app_decipher (app_t app, ctrl_t ctrl, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen,
unsigned int *r_info);
gpg_error_t app_writecert (app_t app, ctrl_t ctrl,
const char *certidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const unsigned char *keydata, size_t keydatalen);
gpg_error_t app_writekey (app_t app, ctrl_t ctrl,
const char *keyidstr, unsigned int flags,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const unsigned char *keydata, size_t keydatalen);
gpg_error_t app_genkey (app_t app, ctrl_t ctrl,
const char *keynostr, unsigned int flags,
time_t createtime,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg);
gpg_error_t app_get_challenge (app_t app, ctrl_t ctrl, size_t nbytes,
unsigned char *buffer);
gpg_error_t app_change_pin (app_t app, ctrl_t ctrl,
const char *chvnostr, int reset_mode,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg);
gpg_error_t app_check_pin (app_t app, ctrl_t ctrl, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg);
/*-- app-openpgp.c --*/
gpg_error_t app_select_openpgp (app_t app);
/*-- app-nks.c --*/
gpg_error_t app_select_nks (app_t app);
/*-- app-dinsig.c --*/
gpg_error_t app_select_dinsig (app_t app);
/*-- app-p15.c --*/
gpg_error_t app_select_p15 (app_t app);
/*-- app-geldkarte.c --*/
gpg_error_t app_select_geldkarte (app_t app);
/*-- app-sc-hsm.c --*/
gpg_error_t app_select_sc_hsm (app_t app);
/*-- app-piv.c --*/
gpg_error_t app_select_piv (app_t app);
#endif /*GNUPG_SCD_APP_COMMON_H*/
diff --git a/scd/app-nks.c b/scd/app-nks.c
index 801ab904a..0f38e7cd0 100644
--- a/scd/app-nks.c
+++ b/scd/app-nks.c
@@ -1,1429 +1,1432 @@
/* app-nks.c - The Telesec NKS card application.
* Copyright (C) 2004, 2007, 2008, 2009 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
/* Notes:
- We are now targeting TCOS 3 cards and it may happen that there is
a regression towards TCOS 2 cards. Please report.
- The TKS3 AUT key is not used. It seems that it is only useful for
the internal authentication command and not accessible by other
applications. The key itself is in the encryption class but the
corresponding certificate has only the digitalSignature
capability.
- If required, we automagically switch between the NKS application
and the SigG application. This avoids to use the DINSIG
application which is somewhat limited, has no support for Secure
Messaging as required by TCOS 3 and has no way to change the PIN
or even set the NullPIN.
- We use the prefix NKS-DF01 for TCOS 2 cards and NKS-NKS3 for newer
cards. This is because the NKS application has moved to DF02 with
TCOS 3 and thus we better use a DF independent tag.
- We use only the global PINs for the NKS application.
*/
#include <config.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <time.h>
#include "scdaemon.h"
#include "../common/i18n.h"
#include "iso7816.h"
#include "app-common.h"
#include "../common/tlv.h"
#include "apdu.h"
#include "../common/host2net.h"
static char const aid_nks[] = { 0xD2, 0x76, 0x00, 0x00, 0x03, 0x01, 0x02 };
static char const aid_sigg[] = { 0xD2, 0x76, 0x00, 0x00, 0x66, 0x01 };
static struct
{
int is_sigg; /* Valid for SigG application. */
int fid; /* File ID. */
int nks_ver; /* 0 for NKS version 2, 3 for version 3. */
int certtype; /* Type of certificate or 0 if it is not a certificate. */
int iskeypair; /* If true has the FID of the corresponding certificate. */
int issignkey; /* True if file is a key usable for signing. */
int isenckey; /* True if file is a key usable for decryption. */
unsigned char kid; /* Corresponding key references. */
} filelist[] = {
{ 0, 0x4531, 0, 0, 0xC000, 1, 0, 0x80 }, /* EF_PK.NKS.SIG */
{ 0, 0xC000, 0, 101 }, /* EF_C.NKS.SIG */
{ 0, 0x4331, 0, 100 },
{ 0, 0x4332, 0, 100 },
{ 0, 0xB000, 0, 110 }, /* EF_PK.RCA.NKS */
{ 0, 0x45B1, 0, 0, 0xC200, 0, 1, 0x81 }, /* EF_PK.NKS.ENC */
{ 0, 0xC200, 0, 101 }, /* EF_C.NKS.ENC */
{ 0, 0x43B1, 0, 100 },
{ 0, 0x43B2, 0, 100 },
/* The authentication key is not used. */
/* { 0, 0x4571, 3, 0, 0xC500, 0, 0, 0x82 }, /\* EF_PK.NKS.AUT *\/ */
/* { 0, 0xC500, 3, 101 }, /\* EF_C.NKS.AUT *\/ */
{ 0, 0x45B2, 3, 0, 0xC201, 0, 1, 0x83 }, /* EF_PK.NKS.ENC1024 */
{ 0, 0xC201, 3, 101 }, /* EF_C.NKS.ENC1024 */
{ 1, 0x4531, 3, 0, 0xC000, 1, 1, 0x84 }, /* EF_PK.CH.SIG */
{ 1, 0xC000, 0, 101 }, /* EF_C.CH.SIG */
{ 1, 0xC008, 3, 101 }, /* EF_C.CA.SIG */
{ 1, 0xC00E, 3, 111 }, /* EF_C.RCA.SIG */
{ 0, 0 }
};
/* Object with application (i.e. NKS) specific data. */
struct app_local_s {
int nks_version; /* NKS version. */
int sigg_active; /* True if switched to the SigG application. */
int sigg_msig_checked;/* True if we checked for a mass signature card. */
int sigg_is_msig; /* True if this is a mass signature card. */
int need_app_select; /* Need to re-select the application. */
};
static gpg_error_t switch_application (app_t app, int enable_sigg);
/* Release local data. */
static void
do_deinit (app_t app)
{
if (app && app->app_local)
{
xfree (app->app_local);
app->app_local = NULL;
}
}
static int
all_zero_p (void *buffer, size_t length)
{
char *p;
for (p=buffer; length; length--, p++)
if (*p)
return 0;
return 1;
}
/* Read the file with FID, assume it contains a public key and return
its keygrip in the caller provided 41 byte buffer R_GRIPSTR. */
static gpg_error_t
keygripstr_from_pk_file (app_t app, int fid, char *r_gripstr)
{
gpg_error_t err;
unsigned char grip[20];
unsigned char *buffer[2];
size_t buflen[2];
gcry_sexp_t sexp;
int i;
int offset[2] = { 0, 0 };
err = iso7816_select_file (app->slot, fid, 0);
if (err)
return err;
err = iso7816_read_record (app->slot, 1, 1, 0, &buffer[0], &buflen[0]);
if (err)
return err;
err = iso7816_read_record (app->slot, 2, 1, 0, &buffer[1], &buflen[1]);
if (err)
{
xfree (buffer[0]);
return err;
}
if (app->app_local->nks_version < 3)
{
/* Old versions of NKS store the values in a TLV encoded format.
We need to do some checks. */
for (i=0; i < 2; i++)
{
/* Check that the value appears like an integer encoded as
Simple-TLV. We don't check the tag because the tests cards I
have use 1 for both, the modulus and the exponent - the
example in the documentation gives 2 for the exponent. */
if (buflen[i] < 3)
err = gpg_error (GPG_ERR_TOO_SHORT);
else if (buffer[i][1] != buflen[i]-2 )
err = gpg_error (GPG_ERR_INV_OBJ);
else
offset[i] = 2;
}
}
else
{
/* Remove leading zeroes to get a correct keygrip. Take care of
negative numbers. We should also fix it the same way in
libgcrypt but we can't yet rely on it yet. */
for (i=0; i < 2; i++)
{
while (buflen[i]-offset[i] > 1
&& !buffer[i][offset[i]]
&& !(buffer[i][offset[i]+1] & 0x80))
offset[i]++;
}
}
/* Check whether negative values are not prefixed with a zero and
fix that. */
for (i=0; i < 2; i++)
{
if ((buflen[i]-offset[i]) && (buffer[i][offset[i]] & 0x80))
{
unsigned char *newbuf;
size_t newlen;
newlen = 1 + buflen[i] - offset[i];
newbuf = xtrymalloc (newlen);
if (!newlen)
{
xfree (buffer[0]);
xfree (buffer[1]);
return gpg_error_from_syserror ();
}
newbuf[0] = 0;
memcpy (newbuf+1, buffer[i]+offset[i], buflen[i] - offset[i]);
xfree (buffer[i]);
buffer[i] = newbuf;
buflen[i] = newlen;
offset[i] = 0;
}
}
if (!err)
err = gcry_sexp_build (&sexp, NULL,
"(public-key (rsa (n %b) (e %b)))",
(int)buflen[0]-offset[0], buffer[0]+offset[0],
(int)buflen[1]-offset[1], buffer[1]+offset[1]);
xfree (buffer[0]);
xfree (buffer[1]);
if (err)
return err;
if (!gcry_pk_get_keygrip (sexp, grip))
{
err = gpg_error (GPG_ERR_INTERNAL); /* i.e. RSA not supported by
libgcrypt. */
}
else
{
bin2hex (grip, 20, r_gripstr);
}
gcry_sexp_release (sexp);
return err;
}
/* TCOS responds to a verify with empty data (i.e. without the Lc
byte) with the status of the PIN. PWID is the PIN ID, If SIGG is
true, the application is switched into SigG mode.
Returns:
-1 = Error retrieving the data,
-2 = No such PIN,
-3 = PIN blocked,
-4 = NullPIN activ,
n >= 0 = Number of verification attempts left. */
static int
get_chv_status (app_t app, int sigg, int pwid)
{
unsigned char *result = NULL;
size_t resultlen;
char command[4];
int rc;
if (switch_application (app, sigg))
return sigg? -2 : -1; /* No such PIN / General error. */
command[0] = 0x00;
command[1] = 0x20;
command[2] = 0x00;
command[3] = pwid;
if (apdu_send_direct (app->slot, 0, (unsigned char *)command,
4, 0, NULL, &result, &resultlen))
rc = -1; /* Error. */
else if (resultlen < 2)
rc = -1; /* Error. */
else
{
unsigned int sw = buf16_to_uint (result+resultlen-2);
if (sw == 0x6a88)
rc = -2; /* No such PIN. */
else if (sw == 0x6983)
rc = -3; /* PIN is blocked. */
else if (sw == 0x6985)
rc = -4; /* NullPIN is activ. */
else if ((sw & 0xfff0) == 0x63C0)
rc = (sw & 0x000f); /* PIN has N tries left. */
else
rc = -1; /* Other error. */
}
xfree (result);
return rc;
}
/* Implement the GETATTR command. This is similar to the LEARN
command but returns just one value via the status interface. */
static gpg_error_t
do_getattr (app_t app, ctrl_t ctrl, const char *name)
{
static struct {
const char *name;
int special;
} table[] = {
{ "$AUTHKEYID", 1 },
{ "NKS-VERSION", 2 },
{ "CHV-STATUS", 3 },
{ NULL, 0 }
};
gpg_error_t err = 0;
int idx;
char buffer[100];
err = switch_application (app, 0);
if (err)
return err;
for (idx=0; table[idx].name && strcmp (table[idx].name, name); idx++)
;
if (!table[idx].name)
return gpg_error (GPG_ERR_INV_NAME);
switch (table[idx].special)
{
case 1: /* $AUTHKEYID */
{
/* NetKey 3.0 cards define an authentication key but according
to the specs this key is only usable for encryption and not
signing. it might work anyway but it has not yet been
tested - fixme. Thus for now we use the NKS signature key
for authentication. */
char const tmp[] = "NKS-NKS3.4531";
send_status_info (ctrl, table[idx].name, tmp, strlen (tmp), NULL, 0);
}
break;
case 2: /* NKS-VERSION */
snprintf (buffer, sizeof buffer, "%d", app->app_local->nks_version);
send_status_info (ctrl, table[idx].name,
buffer, strlen (buffer), NULL, 0);
break;
case 3: /* CHV-STATUS */
{
/* Returns: PW1.CH PW2.CH PW1.CH.SIG PW2.CH.SIG That are the
two global passwords followed by the two SigG passwords.
For the values, see the function get_chv_status. */
int tmp[4];
/* We use a helper array so that we can control that there is
no superfluous application switch. Note that PW2.CH.SIG
really has the identifier 0x83 and not 0x82 as one would
expect. */
tmp[0] = get_chv_status (app, 0, 0x00);
tmp[1] = get_chv_status (app, 0, 0x01);
tmp[2] = get_chv_status (app, 1, 0x81);
tmp[3] = get_chv_status (app, 1, 0x83);
snprintf (buffer, sizeof buffer,
"%d %d %d %d", tmp[0], tmp[1], tmp[2], tmp[3]);
send_status_info (ctrl, table[idx].name,
buffer, strlen (buffer), NULL, 0);
}
break;
default:
err = gpg_error (GPG_ERR_NOT_IMPLEMENTED);
break;
}
return err;
}
static void
do_learn_status_core (app_t app, ctrl_t ctrl, unsigned int flags, int is_sigg)
{
gpg_error_t err;
char ct_buf[100], id_buf[100];
int i;
const char *tag;
if (is_sigg)
tag = "SIGG";
else if (app->app_local->nks_version < 3)
tag = "DF01";
else
tag = "NKS3";
/* Output information about all useful objects in the NKS application. */
for (i=0; filelist[i].fid; i++)
{
if (filelist[i].nks_ver > app->app_local->nks_version)
continue;
if (!!filelist[i].is_sigg != !!is_sigg)
continue;
if (filelist[i].certtype && !(flags &1))
{
size_t len;
len = app_help_read_length_of_cert (app->slot,
filelist[i].fid, NULL);
if (len)
{
/* FIXME: We should store the length in the application's
context so that a following readcert does only need to
read that many bytes. */
snprintf (ct_buf, sizeof ct_buf, "%d", filelist[i].certtype);
snprintf (id_buf, sizeof id_buf, "NKS-%s.%04X",
tag, filelist[i].fid);
send_status_info (ctrl, "CERTINFO",
ct_buf, strlen (ct_buf),
id_buf, strlen (id_buf),
NULL, (size_t)0);
}
}
else if (filelist[i].iskeypair)
{
char gripstr[40+1];
err = keygripstr_from_pk_file (app, filelist[i].fid, gripstr);
if (err)
log_error ("can't get keygrip from FID 0x%04X: %s\n",
filelist[i].fid, gpg_strerror (err));
else
{
snprintf (id_buf, sizeof id_buf, "NKS-%s.%04X",
tag, filelist[i].fid);
send_status_info (ctrl, "KEYPAIRINFO",
gripstr, 40,
id_buf, strlen (id_buf),
NULL, (size_t)0);
}
}
}
}
static gpg_error_t
do_learn_status (app_t app, ctrl_t ctrl, unsigned int flags)
{
gpg_error_t err;
err = switch_application (app, 0);
if (err)
return err;
do_learn_status_core (app, ctrl, flags, 0);
err = switch_application (app, 1);
if (err)
return 0; /* Silently ignore if we can't switch to SigG. */
do_learn_status_core (app, ctrl, flags, 1);
return 0;
}
/* Read the certificate with id CERTID (as returned by learn_status in
the CERTINFO status lines) and return it in the freshly allocated
buffer put into CERT and the length of the certificate put into
CERTLEN. */
static gpg_error_t
do_readcert (app_t app, const char *certid,
unsigned char **cert, size_t *certlen)
{
int i, fid;
gpg_error_t err;
unsigned char *buffer;
const unsigned char *p;
size_t buflen, n;
int class, tag, constructed, ndef;
size_t totobjlen, objlen, hdrlen;
int rootca = 0;
int is_sigg = 0;
*cert = NULL;
*certlen = 0;
if (!strncmp (certid, "NKS-NKS3.", 9))
;
else if (!strncmp (certid, "NKS-DF01.", 9))
;
else if (!strncmp (certid, "NKS-SIGG.", 9))
is_sigg = 1;
else
return gpg_error (GPG_ERR_INV_ID);
err = switch_application (app, is_sigg);
if (err)
return err;
certid += 9;
if (!hexdigitp (certid) || !hexdigitp (certid+1)
|| !hexdigitp (certid+2) || !hexdigitp (certid+3)
|| certid[4])
return gpg_error (GPG_ERR_INV_ID);
fid = xtoi_4 (certid);
for (i=0; filelist[i].fid; i++)
if ((filelist[i].certtype || filelist[i].iskeypair)
&& filelist[i].fid == fid)
break;
if (!filelist[i].fid)
return gpg_error (GPG_ERR_NOT_FOUND);
/* If the requested objects is a plain public key, redirect it to
the corresponding certificate. The whole system is a bit messy
because we sometime use the key directly or let the caller
retrieve the key from the certificate. The rationale for
that is to support not-yet stored certificates. */
if (filelist[i].iskeypair)
fid = filelist[i].iskeypair;
/* Read the entire file. fixme: This could be optimized by first
reading the header to figure out how long the certificate
actually is. */
err = iso7816_select_file (app->slot, fid, 0);
if (err)
{
log_error ("error selecting FID 0x%04X: %s\n", fid, gpg_strerror (err));
return err;
}
err = iso7816_read_binary (app->slot, 0, 0, &buffer, &buflen);
if (err)
{
log_error ("error reading certificate from FID 0x%04X: %s\n",
fid, gpg_strerror (err));
return err;
}
if (!buflen || *buffer == 0xff)
{
log_info ("no certificate contained in FID 0x%04X\n", fid);
err = gpg_error (GPG_ERR_NOT_FOUND);
goto leave;
}
/* Now figure something out about the object. */
p = buffer;
n = buflen;
err = parse_ber_header (&p, &n, &class, &tag, &constructed,
&ndef, &objlen, &hdrlen);
if (err)
goto leave;
if ( class == CLASS_UNIVERSAL && tag == TAG_SEQUENCE && constructed )
;
else if ( class == CLASS_UNIVERSAL && tag == TAG_SET && constructed )
rootca = 1;
else
return gpg_error (GPG_ERR_INV_OBJ);
totobjlen = objlen + hdrlen;
assert (totobjlen <= buflen);
err = parse_ber_header (&p, &n, &class, &tag, &constructed,
&ndef, &objlen, &hdrlen);
if (err)
goto leave;
if (rootca)
;
else if (class == CLASS_UNIVERSAL && tag == TAG_OBJECT_ID && !constructed)
{
const unsigned char *save_p;
/* The certificate seems to be contained in a userCertificate
container. Skip this and assume the following sequence is
the certificate. */
if (n < objlen)
{
err = gpg_error (GPG_ERR_INV_OBJ);
goto leave;
}
p += objlen;
n -= objlen;
save_p = p;
err = parse_ber_header (&p, &n, &class, &tag, &constructed,
&ndef, &objlen, &hdrlen);
if (err)
goto leave;
if ( !(class == CLASS_UNIVERSAL && tag == TAG_SEQUENCE && constructed) )
return gpg_error (GPG_ERR_INV_OBJ);
totobjlen = objlen + hdrlen;
assert (save_p + totobjlen <= buffer + buflen);
memmove (buffer, save_p, totobjlen);
}
*cert = buffer;
buffer = NULL;
*certlen = totobjlen;
leave:
xfree (buffer);
return err;
}
/* Handle the READKEY command. On success a canonical encoded
S-expression with the public key will get stored at PK and its
length at PKLEN; the caller must release that buffer. On error PK
and PKLEN are not changed and an error code is returned. As of now
this function is only useful for the internal authentication key.
Other keys are automagically retrieved via by means of the
certificate parsing code in commands.c:cmd_readkey. For internal
use PK and PKLEN may be NULL to just check for an existing key. */
static gpg_error_t
do_readkey (app_t app, int advanced, const char *keyid,
unsigned char **pk, size_t *pklen)
{
gpg_error_t err;
unsigned char *buffer[2];
size_t buflen[2];
unsigned short path[1] = { 0x4500 };
if (advanced)
return GPG_ERR_NOT_SUPPORTED;
/* We use a generic name to retrieve PK.AUT.IFD-SPK. */
if (!strcmp (keyid, "$IFDAUTHKEY") && app->app_local->nks_version >= 3)
;
else /* Return the error code expected by cmd_readkey. */
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
/* Access the KEYD file which is always in the master directory. */
err = iso7816_select_path (app->slot, path, DIM (path));
if (err)
return err;
/* Due to the above select we need to re-select our application. */
app->app_local->need_app_select = 1;
/* Get the two records. */
err = iso7816_read_record (app->slot, 5, 1, 0, &buffer[0], &buflen[0]);
if (err)
return err;
if (all_zero_p (buffer[0], buflen[0]))
{
xfree (buffer[0]);
return gpg_error (GPG_ERR_NOT_FOUND);
}
err = iso7816_read_record (app->slot, 6, 1, 0, &buffer[1], &buflen[1]);
if (err)
{
xfree (buffer[0]);
return err;
}
if (pk && pklen)
{
*pk = make_canon_sexp_from_rsa_pk (buffer[0], buflen[0],
buffer[1], buflen[1],
pklen);
if (!*pk)
err = gpg_error_from_syserror ();
}
xfree (buffer[0]);
xfree (buffer[1]);
return err;
}
/* Handle the WRITEKEY command for NKS. This function expects a
canonical encoded S-expression with the public key in KEYDATA and
its length in KEYDATALEN. The only supported KEYID is
"$IFDAUTHKEY" to store the terminal key on the card. Bit 0 of
FLAGS indicates whether an existing key shall get overwritten.
PINCB and PINCB_ARG are the usual arguments for the pinentry
callback. */
static gpg_error_t
do_writekey (app_t app, ctrl_t ctrl,
const char *keyid, unsigned int flags,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const unsigned char *keydata, size_t keydatalen)
{
gpg_error_t err;
int force = (flags & 1);
const unsigned char *rsa_n = NULL;
const unsigned char *rsa_e = NULL;
size_t rsa_n_len, rsa_e_len;
unsigned int nbits;
(void)ctrl;
(void)pincb;
(void)pincb_arg;
if (!strcmp (keyid, "$IFDAUTHKEY") && app->app_local->nks_version >= 3)
;
else
return gpg_error (GPG_ERR_INV_ID);
if (!force && !do_readkey (app, 0, keyid, NULL, NULL))
return gpg_error (GPG_ERR_EEXIST);
/* Parse the S-expression. */
err = get_rsa_pk_from_canon_sexp (keydata, keydatalen,
&rsa_n, &rsa_n_len, &rsa_e, &rsa_e_len);
if (err)
goto leave;
/* Check that the parameters match the requirements. */
nbits = app_help_count_bits (rsa_n, rsa_n_len);
if (nbits != 1024)
{
log_error (_("RSA modulus missing or not of size %d bits\n"), 1024);
err = gpg_error (GPG_ERR_BAD_PUBKEY);
goto leave;
}
nbits = app_help_count_bits (rsa_e, rsa_e_len);
if (nbits < 2 || nbits > 32)
{
log_error (_("RSA public exponent missing or larger than %d bits\n"),
32);
err = gpg_error (GPG_ERR_BAD_PUBKEY);
goto leave;
}
/* /\* Store them. *\/ */
/* err = verify_pin (app, 0, NULL, pincb, pincb_arg); */
/* if (err) */
/* goto leave; */
/* Send the MSE:Store_Public_Key. */
err = gpg_error (GPG_ERR_NOT_IMPLEMENTED);
/* mse = xtrymalloc (1000); */
/* mse[0] = 0x80; /\* Algorithm reference. *\/ */
/* mse[1] = 1; */
/* mse[2] = 0x17; */
/* mse[3] = 0x84; /\* Private key reference. *\/ */
/* mse[4] = 1; */
/* mse[5] = 0x77; */
/* mse[6] = 0x7F; /\* Public key parameter. *\/ */
/* mse[7] = 0x49; */
/* mse[8] = 0x81; */
/* mse[9] = 3 + 0x80 + 2 + rsa_e_len; */
/* mse[10] = 0x81; /\* RSA modulus of 128 byte. *\/ */
/* mse[11] = 0x81; */
/* mse[12] = rsa_n_len; */
/* memcpy (mse+12, rsa_n, rsa_n_len); */
/* mse[10] = 0x82; /\* RSA public exponent of up to 4 bytes. *\/ */
/* mse[12] = rsa_e_len; */
/* memcpy (mse+12, rsa_e, rsa_e_len); */
/* err = iso7816_manage_security_env (app->slot, 0x81, 0xB6, */
/* mse, sizeof mse); */
leave:
return err;
}
static gpg_error_t
basic_pin_checks (const char *pinvalue, int minlen, int maxlen)
{
if (strlen (pinvalue) < minlen)
{
log_error ("PIN is too short; minimum length is %d\n", minlen);
return gpg_error (GPG_ERR_BAD_PIN);
}
if (strlen (pinvalue) > maxlen)
{
log_error ("PIN is too large; maximum length is %d\n", maxlen);
return gpg_error (GPG_ERR_BAD_PIN);
}
return 0;
}
/* Verify the PIN if required. */
static gpg_error_t
verify_pin (app_t app, int pwid, const char *desc,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
pininfo_t pininfo;
int rc;
if (!desc)
desc = "PIN";
memset (&pininfo, 0, sizeof pininfo);
pininfo.fixedlen = -1;
pininfo.minlen = 6;
pininfo.maxlen = 16;
if (!opt.disable_pinpad
&& !iso7816_check_pinpad (app->slot, ISO7816_VERIFY, &pininfo) )
{
rc = pincb (pincb_arg, desc, NULL);
if (rc)
{
log_info (_("PIN callback returned error: %s\n"),
gpg_strerror (rc));
return rc;
}
rc = iso7816_verify_kp (app->slot, pwid, &pininfo);
pincb (pincb_arg, NULL, NULL); /* Dismiss the prompt. */
}
else
{
char *pinvalue;
rc = pincb (pincb_arg, desc, &pinvalue);
if (rc)
{
log_info ("PIN callback returned error: %s\n", gpg_strerror (rc));
return rc;
}
rc = basic_pin_checks (pinvalue, pininfo.minlen, pininfo.maxlen);
if (rc)
{
xfree (pinvalue);
return rc;
}
rc = iso7816_verify (app->slot, pwid, pinvalue, strlen (pinvalue));
xfree (pinvalue);
}
if (rc)
{
if ( gpg_err_code (rc) == GPG_ERR_USE_CONDITIONS )
log_error (_("the NullPIN has not yet been changed\n"));
else
log_error ("verify PIN failed\n");
return rc;
}
return 0;
}
/* Create the signature and return the allocated result in OUTDATA.
If a PIN is required the PINCB will be used to ask for the PIN;
that callback should return the PIN in an allocated buffer and
store that in the 3rd argument. */
static gpg_error_t
do_sign (app_t app, const char *keyidstr, int hashalgo,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen )
{
static unsigned char sha1_prefix[15] = /* Object ID is 1.3.14.3.2.26 */
{ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03,
0x02, 0x1a, 0x05, 0x00, 0x04, 0x14 };
static unsigned char rmd160_prefix[15] = /* Object ID is 1.3.36.3.2.1 */
{ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x24, 0x03,
0x02, 0x01, 0x05, 0x00, 0x04, 0x14 };
int rc, i;
int is_sigg = 0;
int fid;
unsigned char kid;
unsigned char data[83]; /* Must be large enough for a SHA-1 digest
+ the largest OID prefix. */
size_t datalen;
if (!keyidstr || !*keyidstr)
return gpg_error (GPG_ERR_INV_VALUE);
switch (indatalen)
{
case 16: case 20: case 35: case 47: case 51: case 67: case 83: break;
default: return gpg_error (GPG_ERR_INV_VALUE);
}
/* Check that the provided ID is valid. This is not really needed
but we do it to enforce correct usage by the caller. */
if (!strncmp (keyidstr, "NKS-NKS3.", 9) )
;
else if (!strncmp (keyidstr, "NKS-DF01.", 9) )
;
else if (!strncmp (keyidstr, "NKS-SIGG.", 9) )
is_sigg = 1;
else
return gpg_error (GPG_ERR_INV_ID);
keyidstr += 9;
rc = switch_application (app, is_sigg);
if (rc)
return rc;
if (is_sigg && app->app_local->sigg_is_msig)
{
log_info ("mass signature cards are not allowed\n");
return gpg_error (GPG_ERR_NOT_SUPPORTED);
}
if (!hexdigitp (keyidstr) || !hexdigitp (keyidstr+1)
|| !hexdigitp (keyidstr+2) || !hexdigitp (keyidstr+3)
|| keyidstr[4])
return gpg_error (GPG_ERR_INV_ID);
fid = xtoi_4 (keyidstr);
for (i=0; filelist[i].fid; i++)
if (filelist[i].iskeypair && filelist[i].fid == fid)
break;
if (!filelist[i].fid)
return gpg_error (GPG_ERR_NOT_FOUND);
if (!filelist[i].issignkey)
return gpg_error (GPG_ERR_INV_ID);
kid = filelist[i].kid;
/* Prepare the DER object from INDATA. */
if (app->app_local->nks_version > 2 && (indatalen == 35
|| indatalen == 47
|| indatalen == 51
|| indatalen == 67
|| indatalen == 83))
{
/* The caller send data matching the length of the ASN.1 encoded
hash for SHA-{1,224,256,384,512}. Assume that is okay. */
assert (indatalen <= sizeof data);
memcpy (data, indata, indatalen);
datalen = indatalen;
}
else if (indatalen == 35)
{
/* Alright, the caller was so kind to send us an already
prepared DER object. This is for TCOS 2. */
if (hashalgo == GCRY_MD_SHA1 && !memcmp (indata, sha1_prefix, 15))
;
else if (hashalgo == GCRY_MD_RMD160 && !memcmp (indata,rmd160_prefix,15))
;
else
return gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM);
memcpy (data, indata, indatalen);
datalen = 35;
}
else if (indatalen == 20)
{
if (hashalgo == GCRY_MD_SHA1)
memcpy (data, sha1_prefix, 15);
else if (hashalgo == GCRY_MD_RMD160)
memcpy (data, rmd160_prefix, 15);
else
return gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM);
memcpy (data+15, indata, indatalen);
datalen = 35;
}
else
return gpg_error (GPG_ERR_INV_VALUE);
/* Send an MSE for PSO:Computer_Signature. */
if (app->app_local->nks_version > 2)
{
unsigned char mse[6];
mse[0] = 0x80; /* Algorithm reference. */
mse[1] = 1;
mse[2] = 2; /* RSA, card does pkcs#1 v1.5 padding, no ASN.1 check. */
mse[3] = 0x84; /* Private key reference. */
mse[4] = 1;
mse[5] = kid;
rc = iso7816_manage_security_env (app->slot, 0x41, 0xB6,
mse, sizeof mse);
}
/* Verify using PW1.CH. */
if (!rc)
rc = verify_pin (app, 0, NULL, pincb, pincb_arg);
/* Compute the signature. */
if (!rc)
rc = iso7816_compute_ds (app->slot, 0, data, datalen, 0,
outdata, outdatalen);
return rc;
}
/* Decrypt the data in INDATA and return the allocated result in OUTDATA.
If a PIN is required the PINCB will be used to ask for the PIN; it
should return the PIN in an allocated buffer and put it into PIN. */
static gpg_error_t
do_decipher (app_t app, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen,
unsigned int *r_info)
{
int rc, i;
int is_sigg = 0;
int fid;
int kid;
(void)r_info;
if (!keyidstr || !*keyidstr || !indatalen)
return gpg_error (GPG_ERR_INV_VALUE);
/* Check that the provided ID is valid. This is not really needed
but we do it to enforce correct usage by the caller. */
if (!strncmp (keyidstr, "NKS-NKS3.", 9) )
;
else if (!strncmp (keyidstr, "NKS-DF01.", 9) )
;
else if (!strncmp (keyidstr, "NKS-SIGG.", 9) )
is_sigg = 1;
else
return gpg_error (GPG_ERR_INV_ID);
keyidstr += 9;
rc = switch_application (app, is_sigg);
if (rc)
return rc;
if (!hexdigitp (keyidstr) || !hexdigitp (keyidstr+1)
|| !hexdigitp (keyidstr+2) || !hexdigitp (keyidstr+3)
|| keyidstr[4])
return gpg_error (GPG_ERR_INV_ID);
fid = xtoi_4 (keyidstr);
for (i=0; filelist[i].fid; i++)
if (filelist[i].iskeypair && filelist[i].fid == fid)
break;
if (!filelist[i].fid)
return gpg_error (GPG_ERR_NOT_FOUND);
if (!filelist[i].isenckey)
return gpg_error (GPG_ERR_INV_ID);
kid = filelist[i].kid;
if (app->app_local->nks_version > 2)
{
unsigned char mse[6];
mse[0] = 0x80; /* Algorithm reference. */
mse[1] = 1;
mse[2] = 0x0a; /* RSA no padding. (0x1A is pkcs#1.5 padding.) */
mse[3] = 0x84; /* Private key reference. */
mse[4] = 1;
mse[5] = kid;
rc = iso7816_manage_security_env (app->slot, 0x41, 0xB8,
mse, sizeof mse);
}
else
{
static const unsigned char mse[] =
{
0x80, 1, 0x10, /* Select algorithm RSA. */
0x84, 1, 0x81 /* Select local secret key 1 for decryption. */
};
rc = iso7816_manage_security_env (app->slot, 0xC1, 0xB8,
mse, sizeof mse);
}
if (!rc)
rc = verify_pin (app, 0, NULL, pincb, pincb_arg);
/* Note that we need to use extended length APDUs for TCOS 3 cards.
Command chaining does not work. */
if (!rc)
rc = iso7816_decipher (app->slot, app->app_local->nks_version > 2? 1:0,
indata, indatalen, 0, 0x81,
outdata, outdatalen);
return rc;
}
/* Parse a password ID string. Returns NULL on error or a string
suitable as passphrase prompt on success. On success stores the
reference value for the password at R_PWID and a flag indicating
that the SigG application is to be used at R_SIGG. If NEW_MODE is
true, the returned description is suitable for a new Password.
Supported values for PWIDSTR are:
PW1.CH - Global password 1
PW2.CH - Global password 2
PW1.CH.SIG - SigG password 1
PW2.CH.SIG - SigG password 2
*/
static const char *
parse_pwidstr (const char *pwidstr, int new_mode, int *r_sigg, int *r_pwid)
{
const char *desc;
if (!pwidstr)
desc = NULL;
else if (!strcmp (pwidstr, "PW1.CH"))
{
*r_sigg = 0;
*r_pwid = 0x00;
/* TRANSLATORS: Do not translate the "|*|" prefixes but keep
them verbatim at the start of the string. */
desc = (new_mode
? _("|N|Please enter a new PIN for the standard keys.")
: _("||Please enter the PIN for the standard keys."));
}
else if (!strcmp (pwidstr, "PW2.CH"))
{
*r_pwid = 0x01;
desc = (new_mode
? _("|NP|Please enter a new PIN Unblocking Code (PUK) "
"for the standard keys.")
: _("|P|Please enter the PIN Unblocking Code (PUK) "
"for the standard keys."));
}
else if (!strcmp (pwidstr, "PW1.CH.SIG"))
{
*r_pwid = 0x81;
*r_sigg = 1;
desc = (new_mode
? _("|N|Please enter a new PIN for the key to create "
"qualified signatures.")
: _("||Please enter the PIN for the key to create "
"qualified signatures."));
}
else if (!strcmp (pwidstr, "PW2.CH.SIG"))
{
*r_pwid = 0x83; /* Yes, that is 83 and not 82. */
*r_sigg = 1;
desc = (new_mode
? _("|NP|Please enter a new PIN Unblocking Code (PUK) "
"for the key to create qualified signatures.")
: _("|P|Please enter the PIN Unblocking Code (PUK) "
"for the key to create qualified signatures."));
}
else
{
*r_pwid = 0; /* Only to avoid gcc warning in calling function. */
desc = NULL; /* Error. */
}
return desc;
}
/* Handle the PASSWD command. See parse_pwidstr() for allowed values
for CHVNOSTR. */
static gpg_error_t
do_change_pin (app_t app, ctrl_t ctrl, const char *pwidstr,
unsigned int flags,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
gpg_error_t err;
char *newpin = NULL;
char *oldpin = NULL;
size_t newpinlen;
size_t oldpinlen;
int is_sigg;
const char *newdesc;
int pwid;
pininfo_t pininfo;
(void)ctrl;
/* The minimum length is enforced by TCOS, the maximum length is
just a reasonable value. */
memset (&pininfo, 0, sizeof pininfo);
pininfo.minlen = 6;
pininfo.maxlen = 16;
newdesc = parse_pwidstr (pwidstr, 1, &is_sigg, &pwid);
if (!newdesc)
return gpg_error (GPG_ERR_INV_ID);
+ if ((flags & APP_CHANGE_FLAG_CLEAR))
+ return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
+
err = switch_application (app, is_sigg);
if (err)
return err;
if ((flags & APP_CHANGE_FLAG_NULLPIN))
{
/* With the nullpin flag, we do not verify the PIN - it would
fail if the Nullpin is still set. */
oldpin = xtrycalloc (1, 6);
if (!oldpin)
{
err = gpg_error_from_syserror ();
goto leave;
}
oldpinlen = 6;
}
else
{
const char *desc;
int dummy1, dummy2;
if ((flags & APP_CHANGE_FLAG_RESET))
{
/* Reset mode: Ask for the alternate PIN. */
const char *altpwidstr;
if (!strcmp (pwidstr, "PW1.CH"))
altpwidstr = "PW2.CH";
else if (!strcmp (pwidstr, "PW2.CH"))
altpwidstr = "PW1.CH";
else if (!strcmp (pwidstr, "PW1.CH.SIG"))
altpwidstr = "PW2.CH.SIG";
else if (!strcmp (pwidstr, "PW2.CH.SIG"))
altpwidstr = "PW1.CH.SIG";
else
{
err = gpg_error (GPG_ERR_BUG);
goto leave;
}
desc = parse_pwidstr (altpwidstr, 0, &dummy1, &dummy2);
}
else
{
/* Regular change mode: Ask for the old PIN. */
desc = parse_pwidstr (pwidstr, 0, &dummy1, &dummy2);
}
err = pincb (pincb_arg, desc, &oldpin);
if (err)
{
log_error ("error getting old PIN: %s\n", gpg_strerror (err));
goto leave;
}
oldpinlen = strlen (oldpin);
err = basic_pin_checks (oldpin, pininfo.minlen, pininfo.maxlen);
if (err)
goto leave;
}
err = pincb (pincb_arg, newdesc, &newpin);
if (err)
{
log_error (_("error getting new PIN: %s\n"), gpg_strerror (err));
goto leave;
}
newpinlen = strlen (newpin);
err = basic_pin_checks (newpin, pininfo.minlen, pininfo.maxlen);
if (err)
goto leave;
if ((flags & APP_CHANGE_FLAG_RESET))
{
char *data;
size_t datalen = oldpinlen + newpinlen;
data = xtrymalloc (datalen);
if (!data)
{
err = gpg_error_from_syserror ();
goto leave;
}
memcpy (data, oldpin, oldpinlen);
memcpy (data+oldpinlen, newpin, newpinlen);
err = iso7816_reset_retry_counter_with_rc (app->slot, pwid,
data, datalen);
wipememory (data, datalen);
xfree (data);
}
else
err = iso7816_change_reference_data (app->slot, pwid,
oldpin, oldpinlen,
newpin, newpinlen);
leave:
xfree (oldpin);
xfree (newpin);
return err;
}
/* Perform a simple verify operation. KEYIDSTR should be NULL or empty. */
static gpg_error_t
do_check_pin (app_t app, const char *pwidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
gpg_error_t err;
int pwid;
int is_sigg;
const char *desc;
desc = parse_pwidstr (pwidstr, 0, &is_sigg, &pwid);
if (!desc)
return gpg_error (GPG_ERR_INV_ID);
err = switch_application (app, is_sigg);
if (err)
return err;
return verify_pin (app, pwid, desc, pincb, pincb_arg);
}
/* Return the version of the NKS application. */
static int
get_nks_version (int slot)
{
unsigned char *result = NULL;
size_t resultlen;
int type;
if (iso7816_apdu_direct (slot, "\x80\xaa\x06\x00\x00", 5, 0,
NULL, &result, &resultlen))
return 2; /* NKS 2 does not support this command. */
/* Example value: 04 11 19 22 21 6A 20 80 03 03 01 01 01 00 00 00
vv tt ccccccccccccccccc aa bb cc vvvvvvvvvvv xx
vendor (Philips) -+ | | | | | | |
chip type -----------+ | | | | | |
chip id ----------------+ | | | | |
card type (3 - tcos 3) -------------------+ | | | |
OS version of card type ---------------------+ | | |
OS release of card type ------------------------+ | |
OS vendor internal version ------------------------+ |
RFU -----------------------------------------------------------+
*/
if (resultlen < 16)
type = 0; /* Invalid data returned. */
else
type = result[8];
xfree (result);
return type;
}
/* If ENABLE_SIGG is true switch to the SigG application if not yet
active. If false switch to the NKS application if not yet active.
Returns 0 on success. */
static gpg_error_t
switch_application (app_t app, int enable_sigg)
{
gpg_error_t err;
if (((app->app_local->sigg_active && enable_sigg)
|| (!app->app_local->sigg_active && !enable_sigg))
&& !app->app_local->need_app_select)
return 0; /* Already switched. */
log_info ("app-nks: switching to %s\n", enable_sigg? "SigG":"NKS");
if (enable_sigg)
err = iso7816_select_application (app->slot, aid_sigg, sizeof aid_sigg, 0);
else
err = iso7816_select_application (app->slot, aid_nks, sizeof aid_nks, 0);
if (!err && enable_sigg && app->app_local->nks_version >= 3
&& !app->app_local->sigg_msig_checked)
{
/* Check whether this card is a mass signature card. */
unsigned char *buffer;
size_t buflen;
const unsigned char *tmpl;
size_t tmpllen;
app->app_local->sigg_msig_checked = 1;
app->app_local->sigg_is_msig = 1;
err = iso7816_select_file (app->slot, 0x5349, 0);
if (!err)
err = iso7816_read_record (app->slot, 1, 1, 0, &buffer, &buflen);
if (!err)
{
tmpl = find_tlv (buffer, buflen, 0x7a, &tmpllen);
if (tmpl && tmpllen == 12
&& !memcmp (tmpl,
"\x93\x02\x00\x01\xA4\x06\x83\x01\x81\x83\x01\x83",
12))
app->app_local->sigg_is_msig = 0;
xfree (buffer);
}
if (app->app_local->sigg_is_msig)
log_info ("This is a mass signature card\n");
}
if (!err)
{
app->app_local->need_app_select = 0;
app->app_local->sigg_active = enable_sigg;
}
else
log_error ("app-nks: error switching to %s: %s\n",
enable_sigg? "SigG":"NKS", gpg_strerror (err));
return err;
}
/* Select the NKS application. */
gpg_error_t
app_select_nks (app_t app)
{
int slot = app->slot;
int rc;
rc = iso7816_select_application (slot, aid_nks, sizeof aid_nks, 0);
if (!rc)
{
app->apptype = "NKS";
app->app_local = xtrycalloc (1, sizeof *app->app_local);
if (!app->app_local)
{
rc = gpg_error (gpg_err_code_from_errno (errno));
goto leave;
}
app->app_local->nks_version = get_nks_version (slot);
if (opt.verbose)
log_info ("Detected NKS version: %d\n", app->app_local->nks_version);
app->fnc.deinit = do_deinit;
app->fnc.learn_status = do_learn_status;
app->fnc.readcert = do_readcert;
app->fnc.readkey = do_readkey;
app->fnc.getattr = do_getattr;
app->fnc.setattr = NULL;
app->fnc.writekey = do_writekey;
app->fnc.genkey = NULL;
app->fnc.sign = do_sign;
app->fnc.auth = NULL;
app->fnc.decipher = do_decipher;
app->fnc.change_pin = do_change_pin;
app->fnc.check_pin = do_check_pin;
}
leave:
if (rc)
do_deinit (app);
return rc;
}
diff --git a/scd/app-openpgp.c b/scd/app-openpgp.c
index f25a36062..fddc3b8cf 100644
--- a/scd/app-openpgp.c
+++ b/scd/app-openpgp.c
@@ -1,5298 +1,5302 @@
/* app-openpgp.c - The OpenPGP card application.
* Copyright (C) 2003, 2004, 2005, 2007, 2008,
* 2009, 2013, 2014, 2015 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
/* Some notes:
CHV means Card Holder Verification and is nothing else than a PIN
or password. That term seems to have been used originally with GSM
cards. Version v2 of the specs changes the term to the clearer
term PW for password. We use the terms here interchangeable
because we do not want to change existing strings i18n wise.
Version 2 of the specs also drops the separate PW2 which was
required in v1 due to ISO requirements. It is now possible to have
one physical PW but two reference to it so that they can be
individually be verified (e.g. to implement a forced verification
for one key). Thus you will noticed the use of PW2 with the verify
command but not with change_reference_data because the latter
operates directly on the physical PW.
The Reset Code (RC) as implemented by v2 cards uses the same error
counter as the PW2 of v1 cards. By default no RC is set and thus
that error counter is set to 0. After setting the RC the error
counter will be initialized to 3.
*/
#include <config.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <assert.h>
#include <time.h>
#if GNUPG_MAJOR_VERSION == 1
/* This is used with GnuPG version < 1.9. The code has been source
copied from the current GnuPG >= 1.9 and is maintained over
there. */
#include "options.h"
#include "errors.h"
#include "memory.h"
#include "cardglue.h"
#else /* GNUPG_MAJOR_VERSION != 1 */
#include "scdaemon.h"
#endif /* GNUPG_MAJOR_VERSION != 1 */
#include "../common/util.h"
#include "../common/i18n.h"
#include "iso7816.h"
#include "app-common.h"
#include "../common/tlv.h"
#include "../common/host2net.h"
#include "../common/openpgpdefs.h"
/* A table describing the DOs of the card. */
static struct {
int tag;
int constructed;
int get_from; /* Constructed DO with this DO or 0 for direct access. */
unsigned int binary:1;
unsigned int dont_cache:1;
unsigned int flush_on_error:1;
unsigned int get_immediate_in_v11:1; /* Enable a hack to bypass the cache of
this data object if it is used in 1.1
and later versions of the card. This
does not work with composite DO and
is currently only useful for the CHV
status bytes. */
unsigned int try_extlen:2; /* Large object; try to use an extended
length APDU when !=0. The size is
determined by extcap.max_certlen_3
when == 1, and by extcap.max_special_do
when == 2. */
char *desc;
} data_objects[] = {
{ 0x005E, 0, 0, 1, 0, 0, 0, 2, "Login Data" },
{ 0x5F50, 0, 0, 0, 0, 0, 0, 2, "URL" },
{ 0x5F52, 0, 0, 1, 0, 0, 0, 0, "Historical Bytes" },
{ 0x0065, 1, 0, 1, 0, 0, 0, 0, "Cardholder Related Data"},
{ 0x005B, 0, 0x65, 0, 0, 0, 0, 0, "Name" },
{ 0x5F2D, 0, 0x65, 0, 0, 0, 0, 0, "Language preferences" },
{ 0x5F35, 0, 0x65, 0, 0, 0, 0, 0, "Salutation" },
{ 0x006E, 1, 0, 1, 0, 0, 0, 0, "Application Related Data" },
{ 0x004F, 0, 0x6E, 1, 0, 0, 0, 0, "AID" },
{ 0x0073, 1, 0, 1, 0, 0, 0, 0, "Discretionary Data Objects" },
{ 0x0047, 0, 0x6E, 1, 1, 0, 0, 0, "Card Capabilities" },
{ 0x00C0, 0, 0x6E, 1, 1, 0, 0, 0, "Extended Card Capabilities" },
{ 0x00C1, 0, 0x6E, 1, 1, 0, 0, 0, "Algorithm Attributes Signature" },
{ 0x00C2, 0, 0x6E, 1, 1, 0, 0, 0, "Algorithm Attributes Decryption" },
{ 0x00C3, 0, 0x6E, 1, 1, 0, 0, 0, "Algorithm Attributes Authentication" },
{ 0x00C4, 0, 0x6E, 1, 0, 1, 1, 0, "CHV Status Bytes" },
{ 0x00C5, 0, 0x6E, 1, 0, 0, 0, 0, "Fingerprints" },
{ 0x00C6, 0, 0x6E, 1, 0, 0, 0, 0, "CA Fingerprints" },
{ 0x00CD, 0, 0x6E, 1, 0, 0, 0, 0, "Generation time" },
{ 0x007A, 1, 0, 1, 0, 0, 0, 0, "Security Support Template" },
{ 0x0093, 0, 0x7A, 1, 1, 0, 0, 0, "Digital Signature Counter" },
{ 0x0101, 0, 0, 0, 0, 0, 0, 2, "Private DO 1"},
{ 0x0102, 0, 0, 0, 0, 0, 0, 2, "Private DO 2"},
{ 0x0103, 0, 0, 0, 0, 0, 0, 2, "Private DO 3"},
{ 0x0104, 0, 0, 0, 0, 0, 0, 2, "Private DO 4"},
{ 0x7F21, 1, 0, 1, 0, 0, 0, 1, "Cardholder certificate"},
/* V3.0 */
{ 0x7F74, 0, 0x6E, 1, 0, 0, 0, 0, "General Feature Management"},
{ 0x00D5, 0, 0, 1, 0, 0, 0, 0, "AES key data"},
{ 0x00D6, 0, 0x6E, 1, 0, 0, 0, 0, "UIF for Signature"},
{ 0x00D7, 0, 0x6E, 1, 0, 0, 0, 0, "UIF for Decryption"},
{ 0x00D8, 0, 0x6E, 1, 0, 0, 0, 0, "UIF for Authentication"},
{ 0x00F9, 0, 0, 1, 0, 0, 0, 0, "KDF data object"},
{ 0 }
};
/* Type of keys. */
typedef enum
{
KEY_TYPE_ECC,
KEY_TYPE_RSA,
}
key_type_t;
/* The format of RSA private keys. */
typedef enum
{
RSA_UNKNOWN_FMT,
RSA_STD,
RSA_STD_N,
RSA_CRT,
RSA_CRT_N
}
rsa_key_format_t;
/* One cache item for DOs. */
struct cache_s {
struct cache_s *next;
int tag;
size_t length;
unsigned char data[1];
};
/* Object with application (i.e. OpenPGP card) specific data. */
struct app_local_s {
/* A linked list with cached DOs. */
struct cache_s *cache;
/* Keep track of the public keys. */
struct
{
int read_done; /* True if we have at least tried to read them. */
unsigned char *key; /* This is a malloced buffer with a canonical
encoded S-expression encoding a public
key. Might be NULL if key is not
available. */
size_t keylen; /* The length of the above S-expression. This
is usually only required for cross checks
because the length of an S-expression is
implicitly available. */
} pk[3];
unsigned char status_indicator; /* The card status indicator. */
unsigned int manufacturer:16; /* Manufacturer ID from the s/n. */
/* Keep track of the ISO card capabilities. */
struct
{
unsigned int cmd_chaining:1; /* Command chaining is supported. */
unsigned int ext_lc_le:1; /* Extended Lc and Le are supported. */
} cardcap;
/* Keep track of extended card capabilities. */
struct
{
unsigned int is_v2:1; /* Compatible to v2 or later. */
unsigned int extcap_v3:1; /* Extcap is in v3 format. */
unsigned int has_button:1; /* Has confirmation button or not. */
unsigned int sm_supported:1; /* Secure Messaging is supported. */
unsigned int get_challenge:1;
unsigned int key_import:1;
unsigned int change_force_chv:1;
unsigned int private_dos:1;
unsigned int algo_attr_change:1; /* Algorithm attributes changeable. */
unsigned int has_decrypt:1; /* Support symmetric decryption. */
unsigned int kdf_do:1; /* Support KDF DO. */
unsigned int sm_algo:2; /* Symmetric crypto algo for SM. */
unsigned int pin_blk2:1; /* PIN block 2 format supported. */
unsigned int mse:1; /* MSE command supported. */
unsigned int max_certlen_3:16;
unsigned int max_get_challenge:16; /* Maximum size for get_challenge. */
unsigned int max_special_do:16; /* Maximum size for special DOs. */
} extcap;
/* Flags used to control the application. */
struct
{
unsigned int no_sync:1; /* Do not sync CHV1 and CHV2 */
unsigned int def_chv2:1; /* Use 123456 for CHV2. */
} flags;
/* Pinpad request specified on card. */
struct
{
unsigned int specified:1;
int fixedlen_user;
int fixedlen_admin;
} pinpad;
struct
{
key_type_t key_type;
union {
struct {
unsigned int n_bits; /* Size of the modulus in bits. The rest
of this strucuire is only valid if
this is not 0. */
unsigned int e_bits; /* Size of the public exponent in bits. */
rsa_key_format_t format;
} rsa;
struct {
const char *curve;
int flags;
} ecc;
};
} keyattr[3];
};
#define ECC_FLAG_DJB_TWEAK (1 << 0)
#define ECC_FLAG_PUBKEY (1 << 1)
/***** Local prototypes *****/
static unsigned long convert_sig_counter_value (const unsigned char *value,
size_t valuelen);
static unsigned long get_sig_counter (app_t app);
static gpg_error_t do_auth (app_t app, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen);
static void parse_algorithm_attribute (app_t app, int keyno);
static gpg_error_t change_keyattr_from_string
(app_t app,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *value, size_t valuelen);
/* Deconstructor. */
static void
do_deinit (app_t app)
{
if (app && app->app_local)
{
struct cache_s *c, *c2;
int i;
for (c = app->app_local->cache; c; c = c2)
{
c2 = c->next;
xfree (c);
}
for (i=0; i < DIM (app->app_local->pk); i++)
{
xfree (app->app_local->pk[i].key);
app->app_local->pk[i].read_done = 0;
}
xfree (app->app_local);
app->app_local = NULL;
}
}
/* Wrapper around iso7816_get_data which first tries to get the data
from the cache. With GET_IMMEDIATE passed as true, the cache is
bypassed. With TRY_EXTLEN extended lengths APDUs are use if
supported by the card. */
static gpg_error_t
get_cached_data (app_t app, int tag,
unsigned char **result, size_t *resultlen,
int get_immediate, int try_extlen)
{
gpg_error_t err;
int i;
unsigned char *p;
size_t len;
struct cache_s *c;
int exmode;
*result = NULL;
*resultlen = 0;
if (!get_immediate)
{
for (c=app->app_local->cache; c; c = c->next)
if (c->tag == tag)
{
if(c->length)
{
p = xtrymalloc (c->length);
if (!p)
return gpg_error (gpg_err_code_from_errno (errno));
memcpy (p, c->data, c->length);
*result = p;
}
*resultlen = c->length;
return 0;
}
}
if (try_extlen && app->app_local->cardcap.ext_lc_le)
{
if (try_extlen == 1)
exmode = app->app_local->extcap.max_certlen_3;
else if (try_extlen == 2 && app->app_local->extcap.extcap_v3)
exmode = app->app_local->extcap.max_special_do;
else
exmode = 0;
}
else
exmode = 0;
err = iso7816_get_data (app->slot, exmode, tag, &p, &len);
if (err)
return err;
if (len)
*result = p;
*resultlen = len;
/* Check whether we should cache this object. */
if (get_immediate)
return 0;
for (i=0; data_objects[i].tag; i++)
if (data_objects[i].tag == tag)
{
if (data_objects[i].dont_cache)
return 0;
break;
}
/* Okay, cache it. */
for (c=app->app_local->cache; c; c = c->next)
assert (c->tag != tag);
c = xtrymalloc (sizeof *c + len);
if (c)
{
if (len)
memcpy (c->data, p, len);
else
xfree (p);
c->length = len;
c->tag = tag;
c->next = app->app_local->cache;
app->app_local->cache = c;
}
return 0;
}
/* Remove DO at TAG from the cache. */
static void
flush_cache_item (app_t app, int tag)
{
struct cache_s *c, *cprev;
int i;
if (!app->app_local)
return;
for (c=app->app_local->cache, cprev=NULL; c ; cprev=c, c = c->next)
if (c->tag == tag)
{
if (cprev)
cprev->next = c->next;
else
app->app_local->cache = c->next;
xfree (c);
for (c=app->app_local->cache; c ; c = c->next)
{
assert (c->tag != tag); /* Oops: duplicated entry. */
}
return;
}
/* Try again if we have an outer tag. */
for (i=0; data_objects[i].tag; i++)
if (data_objects[i].tag == tag && data_objects[i].get_from
&& data_objects[i].get_from != tag)
flush_cache_item (app, data_objects[i].get_from);
}
/* Flush all entries from the cache which might be out of sync after
an error. */
static void
flush_cache_after_error (app_t app)
{
int i;
for (i=0; data_objects[i].tag; i++)
if (data_objects[i].flush_on_error)
flush_cache_item (app, data_objects[i].tag);
}
/* Flush the entire cache. */
static void
flush_cache (app_t app)
{
if (app && app->app_local)
{
struct cache_s *c, *c2;
for (c = app->app_local->cache; c; c = c2)
{
c2 = c->next;
xfree (c);
}
app->app_local->cache = NULL;
}
}
/* Get the DO identified by TAG from the card in SLOT and return a
buffer with its content in RESULT and NBYTES. The return value is
NULL if not found or a pointer which must be used to release the
buffer holding value. */
static void *
get_one_do (app_t app, int tag, unsigned char **result, size_t *nbytes,
int *r_rc)
{
int rc, i;
unsigned char *buffer;
size_t buflen;
unsigned char *value;
size_t valuelen;
int dummyrc;
int exmode;
if (!r_rc)
r_rc = &dummyrc;
*result = NULL;
*nbytes = 0;
*r_rc = 0;
for (i=0; data_objects[i].tag && data_objects[i].tag != tag; i++)
;
if (app->card_version > 0x0100 && data_objects[i].get_immediate_in_v11)
{
exmode = 0;
rc = iso7816_get_data (app->slot, exmode, tag, &buffer, &buflen);
if (rc)
{
*r_rc = rc;
return NULL;
}
*result = buffer;
*nbytes = buflen;
return buffer;
}
value = NULL;
rc = -1;
if (data_objects[i].tag && data_objects[i].get_from)
{
rc = get_cached_data (app, data_objects[i].get_from,
&buffer, &buflen,
(data_objects[i].dont_cache
|| data_objects[i].get_immediate_in_v11),
data_objects[i].try_extlen);
if (!rc)
{
const unsigned char *s;
s = find_tlv_unchecked (buffer, buflen, tag, &valuelen);
if (!s)
value = NULL; /* not found */
else if (valuelen > buflen - (s - buffer))
{
log_error ("warning: constructed DO too short\n");
value = NULL;
xfree (buffer); buffer = NULL;
}
else
value = buffer + (s - buffer);
}
}
if (!value) /* Not in a constructed DO, try simple. */
{
rc = get_cached_data (app, tag, &buffer, &buflen,
(data_objects[i].dont_cache
|| data_objects[i].get_immediate_in_v11),
data_objects[i].try_extlen);
if (!rc)
{
value = buffer;
valuelen = buflen;
}
}
if (!rc)
{
*nbytes = valuelen;
*result = value;
return buffer;
}
*r_rc = rc;
return NULL;
}
static void
dump_all_do (int slot)
{
int rc, i, j;
unsigned char *buffer;
size_t buflen;
for (i=0; data_objects[i].tag; i++)
{
if (data_objects[i].get_from)
continue;
/* We don't try extended length APDU because such large DO would
be pretty useless in a log file. */
rc = iso7816_get_data (slot, 0, data_objects[i].tag, &buffer, &buflen);
if (gpg_err_code (rc) == GPG_ERR_NO_OBJ)
;
else if (rc)
log_info ("DO '%s' not available: %s\n",
data_objects[i].desc, gpg_strerror (rc));
else
{
if (data_objects[i].binary)
{
log_info ("DO '%s': ", data_objects[i].desc);
log_printhex (buffer, buflen, "");
}
else
log_info ("DO '%s': '%.*s'\n",
data_objects[i].desc,
(int)buflen, buffer); /* FIXME: sanitize */
if (data_objects[i].constructed)
{
for (j=0; data_objects[j].tag; j++)
{
const unsigned char *value;
size_t valuelen;
if (j==i || data_objects[i].tag != data_objects[j].get_from)
continue;
value = find_tlv_unchecked (buffer, buflen,
data_objects[j].tag, &valuelen);
if (!value)
; /* not found */
else if (valuelen > buflen - (value - buffer))
log_error ("warning: constructed DO too short\n");
else
{
if (data_objects[j].binary)
{
log_info ("DO '%s': ", data_objects[j].desc);
if (valuelen > 200)
log_info ("[%u]\n", (unsigned int)valuelen);
else
log_printhex (value, valuelen, "");
}
else
log_info ("DO '%s': '%.*s'\n",
data_objects[j].desc,
(int)valuelen, value); /* FIXME: sanitize */
}
}
}
}
xfree (buffer); buffer = NULL;
}
}
/* Count the number of bits, assuming the A represents an unsigned big
integer of length LEN bytes. */
static unsigned int
count_bits (const unsigned char *a, size_t len)
{
unsigned int n = len * 8;
int i;
for (; len && !*a; len--, a++, n -=8)
;
if (len)
{
for (i=7; i && !(*a & (1<<i)); i--)
n--;
}
return n;
}
/* GnuPG makes special use of the login-data DO, this function parses
the login data to store the flags for later use. It may be called
at any time and should be called after changing the login-data DO.
Everything up to a LF is considered a mailbox or account name. If
the first LF is followed by DC4 (0x14) control sequence are
expected up to the next LF. Control sequences are separated by FS
(0x18) and consist of key=value pairs. There are two keys defined:
F=<flags>
Where FLAGS is a plain hexadecimal number representing flag values.
The lsb is here the rightmost bit. Defined flags bits are:
Bit 0 = CHV1 and CHV2 are not synchronized
Bit 1 = CHV2 has been set to the default PIN of "123456"
(this implies that bit 0 is also set).
P=<pinpad-request>
Where PINPAD_REQUEST is in the format of: <n> or <n>,<m>.
N for user PIN, M for admin PIN. If M is missing it means M=N.
0 means to force not to use pinpad.
*/
static void
parse_login_data (app_t app)
{
unsigned char *buffer, *p;
size_t buflen, len;
void *relptr;
/* Set defaults. */
app->app_local->flags.no_sync = 0;
app->app_local->flags.def_chv2 = 0;
app->app_local->pinpad.specified = 0;
app->app_local->pinpad.fixedlen_user = -1;
app->app_local->pinpad.fixedlen_admin = -1;
/* Read the DO. */
relptr = get_one_do (app, 0x005E, &buffer, &buflen, NULL);
if (!relptr)
return; /* Ooops. */
for (; buflen; buflen--, buffer++)
if (*buffer == '\n')
break;
if (buflen < 2 || buffer[1] != '\x14')
{
xfree (relptr);
return; /* No control sequences. */
}
buflen--;
buffer++;
do
{
buflen--;
buffer++;
if (buflen > 1 && *buffer == 'F' && buffer[1] == '=')
{
/* Flags control sequence found. */
int lastdig = 0;
/* For now we are only interested in the last digit, so skip
any leading digits but bail out on invalid characters. */
for (p=buffer+2, len = buflen-2; len && hexdigitp (p); p++, len--)
lastdig = xtoi_1 (p);
buffer = p;
buflen = len;
if (len && !(*p == '\n' || *p == '\x18'))
goto next; /* Invalid characters in field. */
app->app_local->flags.no_sync = !!(lastdig & 1);
app->app_local->flags.def_chv2 = (lastdig & 3) == 3;
}
else if (buflen > 1 && *buffer == 'P' && buffer[1] == '=')
{
/* Pinpad request control sequence found. */
buffer += 2;
buflen -= 2;
if (buflen)
{
if (digitp (buffer))
{
char *q;
int n, m;
n = strtol (buffer, &q, 10);
if (q >= (char *)buffer + buflen
|| *q == '\x18' || *q == '\n')
m = n;
else
{
if (*q++ != ',' || !digitp (q))
goto next;
m = strtol (q, &q, 10);
}
if (buflen < ((unsigned char *)q - buffer))
break;
buflen -= ((unsigned char *)q - buffer);
buffer = q;
if (buflen && !(*buffer == '\n' || *buffer == '\x18'))
goto next;
app->app_local->pinpad.specified = 1;
app->app_local->pinpad.fixedlen_user = n;
app->app_local->pinpad.fixedlen_admin = m;
}
}
}
next:
/* Skip to FS (0x18) or LF (\n). */
for (; buflen && *buffer != '\x18' && *buffer != '\n'; buflen--)
buffer++;
}
while (buflen && *buffer != '\n');
xfree (relptr);
}
#define MAX_ARGS_STORE_FPR 3
/* Note, that FPR must be at least 20 bytes. */
static gpg_error_t
store_fpr (app_t app, int keynumber, u32 timestamp, unsigned char *fpr,
int algo, ...)
{
unsigned int n, nbits;
unsigned char *buffer, *p;
int tag, tag2;
int rc;
const unsigned char *m[MAX_ARGS_STORE_FPR];
size_t mlen[MAX_ARGS_STORE_FPR];
va_list ap;
int argc;
int i;
n = 6; /* key packet version, 4-byte timestamps, and algorithm */
if (algo == PUBKEY_ALGO_ECDH)
argc = 3;
else
argc = 2;
va_start (ap, algo);
for (i = 0; i < argc; i++)
{
m[i] = va_arg (ap, const unsigned char *);
mlen[i] = va_arg (ap, size_t);
if (algo == PUBKEY_ALGO_RSA || i == 1)
n += 2;
n += mlen[i];
}
va_end (ap);
p = buffer = xtrymalloc (3 + n);
if (!buffer)
return gpg_error_from_syserror ();
*p++ = 0x99; /* ctb */
*p++ = n >> 8; /* 2 byte length header */
*p++ = n;
*p++ = 4; /* key packet version */
*p++ = timestamp >> 24;
*p++ = timestamp >> 16;
*p++ = timestamp >> 8;
*p++ = timestamp;
*p++ = algo;
for (i = 0; i < argc; i++)
{
if (algo == PUBKEY_ALGO_RSA || i == 1)
{
nbits = count_bits (m[i], mlen[i]);
*p++ = nbits >> 8;
*p++ = nbits;
}
memcpy (p, m[i], mlen[i]);
p += mlen[i];
}
gcry_md_hash_buffer (GCRY_MD_SHA1, fpr, buffer, n+3);
xfree (buffer);
tag = (app->card_version > 0x0007? 0xC7 : 0xC6) + keynumber;
flush_cache_item (app, 0xC5);
tag2 = 0xCE + keynumber;
flush_cache_item (app, 0xCD);
rc = iso7816_put_data (app->slot, 0, tag, fpr, 20);
if (rc)
log_error (_("failed to store the fingerprint: %s\n"),gpg_strerror (rc));
if (!rc && app->card_version > 0x0100)
{
unsigned char buf[4];
buf[0] = timestamp >> 24;
buf[1] = timestamp >> 16;
buf[2] = timestamp >> 8;
buf[3] = timestamp;
rc = iso7816_put_data (app->slot, 0, tag2, buf, 4);
if (rc)
log_error (_("failed to store the creation date: %s\n"),
gpg_strerror (rc));
}
return rc;
}
static void
send_fpr_if_not_null (ctrl_t ctrl, const char *keyword,
int number, const unsigned char *fpr)
{
int i;
char buf[41];
char numbuf[25];
for (i=0; i < 20 && !fpr[i]; i++)
;
if (i==20)
return; /* All zero. */
bin2hex (fpr, 20, buf);
if (number == -1)
*numbuf = 0; /* Don't print the key number */
else
sprintf (numbuf, "%d", number);
send_status_info (ctrl, keyword,
numbuf, (size_t)strlen(numbuf),
buf, (size_t)strlen (buf), NULL, 0);
}
static void
send_fprtime_if_not_null (ctrl_t ctrl, const char *keyword,
int number, const unsigned char *stamp)
{
char numbuf1[50], numbuf2[50];
unsigned long value;
value = buf32_to_ulong (stamp);
if (!value)
return;
sprintf (numbuf1, "%d", number);
sprintf (numbuf2, "%lu", value);
send_status_info (ctrl, keyword,
numbuf1, (size_t)strlen(numbuf1),
numbuf2, (size_t)strlen(numbuf2), NULL, 0);
}
static void
send_key_data (ctrl_t ctrl, const char *name,
const unsigned char *a, size_t alen)
{
char *buffer, *buf;
size_t buflen;
buffer = buf = bin2hex (a, alen, NULL);
if (!buffer)
{
log_error ("memory allocation error in send_key_data\n");
return;
}
buflen = strlen (buffer);
/* 768 is the hexified size for the modulus of an 3072 bit key. We
use extra chunks to transmit larger data (i.e for 4096 bit). */
for ( ;buflen > 768; buflen -= 768, buf += 768)
send_status_info (ctrl, "KEY-DATA",
"-", 1,
buf, 768,
NULL, 0);
send_status_info (ctrl, "KEY-DATA",
name, (size_t)strlen(name),
buf, buflen,
NULL, 0);
xfree (buffer);
}
static void
send_key_attr (ctrl_t ctrl, app_t app, const char *keyword, int keyno)
{
char buffer[200];
assert (keyno >=0 && keyno < DIM(app->app_local->keyattr));
if (app->app_local->keyattr[keyno].key_type == KEY_TYPE_RSA)
snprintf (buffer, sizeof buffer, "%d 1 rsa%u %u %d",
keyno+1,
app->app_local->keyattr[keyno].rsa.n_bits,
app->app_local->keyattr[keyno].rsa.e_bits,
app->app_local->keyattr[keyno].rsa.format);
else if (app->app_local->keyattr[keyno].key_type == KEY_TYPE_ECC)
{
snprintf (buffer, sizeof buffer, "%d %d %s",
keyno+1,
keyno==1? PUBKEY_ALGO_ECDH :
(app->app_local->keyattr[keyno].ecc.flags & ECC_FLAG_DJB_TWEAK)?
PUBKEY_ALGO_EDDSA : PUBKEY_ALGO_ECDSA,
app->app_local->keyattr[keyno].ecc.curve);
}
else
snprintf (buffer, sizeof buffer, "%d 0 0 UNKNOWN", keyno+1);
send_status_direct (ctrl, keyword, buffer);
}
#define RSA_SMALL_SIZE_KEY 1952
#define RSA_SMALL_SIZE_OP 2048
static int
determine_rsa_response (app_t app, int keyno)
{
int size;
size = 2 + 3 /* header */
+ 4 /* tag+len */ + (app->app_local->keyattr[keyno].rsa.n_bits+7)/8
+ 2 /* tag+len */ + (app->app_local->keyattr[keyno].rsa.e_bits+7)/8;
return size;
}
/* Implement the GETATTR command. This is similar to the LEARN
command but returns just one value via the status interface. */
static gpg_error_t
do_getattr (app_t app, ctrl_t ctrl, const char *name)
{
static struct {
const char *name;
int tag;
int special;
} table[] = {
{ "DISP-NAME", 0x005B },
{ "LOGIN-DATA", 0x005E },
{ "DISP-LANG", 0x5F2D },
{ "DISP-SEX", 0x5F35 },
{ "PUBKEY-URL", 0x5F50 },
{ "KEY-FPR", 0x00C5, 3 },
{ "KEY-TIME", 0x00CD, 4 },
{ "KEY-ATTR", 0x0000, -5 },
{ "CA-FPR", 0x00C6, 3 },
{ "CHV-STATUS", 0x00C4, 1 },
{ "SIG-COUNTER", 0x0093, 2 },
{ "SERIALNO", 0x004F, -1 },
{ "AID", 0x004F },
{ "EXTCAP", 0x0000, -2 },
{ "PRIVATE-DO-1", 0x0101 },
{ "PRIVATE-DO-2", 0x0102 },
{ "PRIVATE-DO-3", 0x0103 },
{ "PRIVATE-DO-4", 0x0104 },
{ "$AUTHKEYID", 0x0000, -3 },
{ "$DISPSERIALNO",0x0000, -4 },
{ "UIF-1", 0x00D6, 0 },
{ "UIF-2", 0x00D7, 0 },
{ "UIF-3", 0x00D8, 0 },
{ "KDF", 0x00F9 },
{ NULL, 0 }
};
int idx, i, rc;
void *relptr;
unsigned char *value;
size_t valuelen;
for (idx=0; table[idx].name && strcmp (table[idx].name, name); idx++)
;
if (!table[idx].name)
return gpg_error (GPG_ERR_INV_NAME);
if (table[idx].special == -1)
{
/* The serial number is very special. We could have used the
AID DO to retrieve it. The AID DO is available anyway but
not hex formatted. */
char *serial = app_get_serialno (app);
if (serial)
{
send_status_direct (ctrl, "SERIALNO", serial);
xfree (serial);
}
return 0;
}
if (table[idx].special == -2)
{
char tmp[110];
snprintf (tmp, sizeof tmp,
"gc=%d ki=%d fc=%d pd=%d mcl3=%u aac=%d "
"sm=%d si=%u dec=%d bt=%d kdf=%d",
app->app_local->extcap.get_challenge,
app->app_local->extcap.key_import,
app->app_local->extcap.change_force_chv,
app->app_local->extcap.private_dos,
app->app_local->extcap.max_certlen_3,
app->app_local->extcap.algo_attr_change,
(app->app_local->extcap.sm_supported
? (app->app_local->extcap.sm_algo == 0? CIPHER_ALGO_3DES :
(app->app_local->extcap.sm_algo == 1?
CIPHER_ALGO_AES : CIPHER_ALGO_AES256))
: 0),
app->app_local->status_indicator,
app->app_local->extcap.has_decrypt,
app->app_local->extcap.has_button,
app->app_local->extcap.kdf_do);
send_status_info (ctrl, table[idx].name, tmp, strlen (tmp), NULL, 0);
return 0;
}
if (table[idx].special == -3)
{
char const tmp[] = "OPENPGP.3";
send_status_info (ctrl, table[idx].name, tmp, strlen (tmp), NULL, 0);
return 0;
}
if (table[idx].special == -4)
{
char *serial = app_get_serialno (app);
if (serial)
{
if (strlen (serial) > 16+12)
{
send_status_info (ctrl, table[idx].name, serial+16, 12, NULL, 0);
xfree (serial);
return 0;
}
xfree (serial);
}
return gpg_error (GPG_ERR_INV_NAME);
}
if (table[idx].special == -5)
{
for (i=0; i < 3; i++)
send_key_attr (ctrl, app, table[idx].name, i);
return 0;
}
relptr = get_one_do (app, table[idx].tag, &value, &valuelen, &rc);
if (relptr)
{
if (table[idx].special == 1)
{
char numbuf[7*23];
for (i=0,*numbuf=0; i < valuelen && i < 7; i++)
sprintf (numbuf+strlen (numbuf), " %d", value[i]);
send_status_info (ctrl, table[idx].name,
numbuf, strlen (numbuf), NULL, 0);
}
else if (table[idx].special == 2)
{
char numbuf[50];
sprintf (numbuf, "%lu", convert_sig_counter_value (value, valuelen));
send_status_info (ctrl, table[idx].name,
numbuf, strlen (numbuf), NULL, 0);
}
else if (table[idx].special == 3)
{
if (valuelen >= 60)
for (i=0; i < 3; i++)
send_fpr_if_not_null (ctrl, table[idx].name, i+1, value+i*20);
}
else if (table[idx].special == 4)
{
if (valuelen >= 12)
for (i=0; i < 3; i++)
send_fprtime_if_not_null (ctrl, table[idx].name, i+1, value+i*4);
}
else
send_status_info (ctrl, table[idx].name, value, valuelen, NULL, 0);
xfree (relptr);
}
return rc;
}
/* Return the DISP-NAME without any padding characters. Caller must
* free the result. If not found or empty NULL is returned. */
static char *
get_disp_name (app_t app)
{
int rc;
void *relptr;
unsigned char *value;
size_t valuelen;
char *string;
char *p, *given;
char *result;
relptr = get_one_do (app, 0x005B, &value, &valuelen, &rc);
if (!relptr)
return NULL;
string = xtrymalloc (valuelen + 1);
if (!string)
{
xfree (relptr);
return NULL;
}
memcpy (string, value, valuelen);
string[valuelen] = 0;
xfree (relptr);
/* Swap surname and given name. */
given = strstr (string, "<<");
for (p = string; *p; p++)
if (*p == '<')
*p = ' ';
if (given && given[2])
{
*given = 0;
given += 2;
result = strconcat (given, " ", string, NULL);
}
else
{
result = string;
string = NULL;
}
xfree (string);
return result;
}
/* Return the pretty formatted serialnumber. On error NULL is
* returned. */
static char *
get_disp_serialno (app_t app)
{
char *serial = app_get_serialno (app);
/* For our OpenPGP cards we do not want to show the entire serial
* number but a nicely reformatted actual serial number. */
if (serial && strlen (serial) > 16+12)
{
memmove (serial, serial+16, 4);
serial[4] = ' ';
/* memmove (serial+5, serial+20, 4); */
/* serial[9] = ' '; */
/* memmove (serial+10, serial+24, 4); */
/* serial[14] = 0; */
memmove (serial+5, serial+20, 8);
serial[13] = 0;
}
return serial;
}
/* Return the number of remaining tries for the standard or the admin
* pw. Returns -1 on card error. */
static int
get_remaining_tries (app_t app, int adminpw)
{
void *relptr;
unsigned char *value;
size_t valuelen;
int remaining;
relptr = get_one_do (app, 0x00C4, &value, &valuelen, NULL);
if (!relptr || valuelen < 7)
{
log_error (_("error retrieving CHV status from card\n"));
xfree (relptr);
return -1;
}
remaining = value[adminpw? 6 : 4];
xfree (relptr);
return remaining;
}
/* Retrieve the fingerprint from the card inserted in SLOT and write
the according hex representation to FPR. Caller must have provide
a buffer at FPR of least 41 bytes. Returns 0 on success or an
error code. */
#if GNUPG_MAJOR_VERSION > 1
static gpg_error_t
retrieve_fpr_from_card (app_t app, int keyno, char *fpr)
{
gpg_error_t err = 0;
void *relptr;
unsigned char *value;
size_t valuelen;
assert (keyno >=0 && keyno <= 2);
relptr = get_one_do (app, 0x00C5, &value, &valuelen, NULL);
if (relptr && valuelen >= 60)
bin2hex (value+keyno*20, 20, fpr);
else
err = gpg_error (GPG_ERR_NOT_FOUND);
xfree (relptr);
return err;
}
#endif /*GNUPG_MAJOR_VERSION > 1*/
/* Retrieve the public key material for the RSA key, whose fingerprint
is FPR, from gpg output, which can be read through the stream FP.
The RSA modulus will be stored at the address of M and MLEN, the
public exponent at E and ELEN. Returns zero on success, an error
code on failure. Caller must release the allocated buffers at M
and E if the function returns success. */
#if GNUPG_MAJOR_VERSION > 1
static gpg_error_t
retrieve_key_material (FILE *fp, const char *hexkeyid,
const unsigned char **m, size_t *mlen,
const unsigned char **e, size_t *elen)
{
gcry_error_t err = 0;
char *line = NULL; /* read_line() buffer. */
size_t line_size = 0; /* Helper for for read_line. */
int found_key = 0; /* Helper to find a matching key. */
unsigned char *m_new = NULL;
unsigned char *e_new = NULL;
size_t m_new_n = 0;
size_t e_new_n = 0;
/* Loop over all records until we have found the subkey
corresponding to the fingerprint. Inm general the first record
should be the pub record, but we don't rely on that. Given that
we only need to look at one key, it is sufficient to compare the
keyid so that we don't need to look at "fpr" records. */
for (;;)
{
char *p;
char *fields[6] = { NULL, NULL, NULL, NULL, NULL, NULL };
int nfields;
size_t max_length;
gcry_mpi_t mpi;
int i;
max_length = 4096;
i = read_line (fp, &line, &line_size, &max_length);
if (!i)
break; /* EOF. */
if (i < 0)
{
err = gpg_error_from_syserror ();
goto leave; /* Error. */
}
if (!max_length)
{
err = gpg_error (GPG_ERR_TRUNCATED);
goto leave; /* Line truncated - we better stop processing. */
}
/* Parse the line into fields. */
for (nfields=0, p=line; p && nfields < DIM (fields); nfields++)
{
fields[nfields] = p;
p = strchr (p, ':');
if (p)
*(p++) = 0;
}
if (!nfields)
continue; /* No fields at all - skip line. */
if (!found_key)
{
if ( (!strcmp (fields[0], "sub") || !strcmp (fields[0], "pub") )
&& nfields > 4 && !strcmp (fields[4], hexkeyid))
found_key = 1;
continue;
}
if ( !strcmp (fields[0], "sub") || !strcmp (fields[0], "pub") )
break; /* Next key - stop. */
if ( strcmp (fields[0], "pkd") )
continue; /* Not a key data record. */
if ( nfields < 4 || (i = atoi (fields[1])) < 0 || i > 1
|| (!i && m_new) || (i && e_new))
{
err = gpg_error (GPG_ERR_GENERAL);
goto leave; /* Error: Invalid key data record or not an RSA key. */
}
err = gcry_mpi_scan (&mpi, GCRYMPI_FMT_HEX, fields[3], 0, NULL);
if (err)
mpi = NULL;
else if (!i)
err = gcry_mpi_aprint (GCRYMPI_FMT_STD, &m_new, &m_new_n, mpi);
else
err = gcry_mpi_aprint (GCRYMPI_FMT_STD, &e_new, &e_new_n, mpi);
gcry_mpi_release (mpi);
if (err)
goto leave;
}
if (m_new && e_new)
{
*m = m_new;
*mlen = m_new_n;
m_new = NULL;
*e = e_new;
*elen = e_new_n;
e_new = NULL;
}
else
err = gpg_error (GPG_ERR_GENERAL);
leave:
xfree (m_new);
xfree (e_new);
xfree (line);
return err;
}
#endif /*GNUPG_MAJOR_VERSION > 1*/
static gpg_error_t
rsa_read_pubkey (app_t app, ctrl_t ctrl, u32 created_at, int keyno,
const unsigned char *data, size_t datalen, gcry_sexp_t *r_sexp)
{
gpg_error_t err;
const unsigned char *m, *e;
size_t mlen, elen;
unsigned char *mbuf = NULL, *ebuf = NULL;
m = find_tlv (data, datalen, 0x0081, &mlen);
if (!m)
{
log_error (_("response does not contain the RSA modulus\n"));
return gpg_error (GPG_ERR_CARD);
}
e = find_tlv (data, datalen, 0x0082, &elen);
if (!e)
{
log_error (_("response does not contain the RSA public exponent\n"));
return gpg_error (GPG_ERR_CARD);
}
if (ctrl)
{
send_key_data (ctrl, "n", m, mlen);
send_key_data (ctrl, "e", e, elen);
}
for (; mlen && !*m; mlen--, m++) /* strip leading zeroes */
;
for (; elen && !*e; elen--, e++) /* strip leading zeroes */
;
if (ctrl)
{
unsigned char fprbuf[20];
err = store_fpr (app, keyno, created_at, fprbuf, PUBKEY_ALGO_RSA,
m, mlen, e, elen);
if (err)
return err;
send_fpr_if_not_null (ctrl, "KEY-FPR", -1, fprbuf);
}
mbuf = xtrymalloc (mlen + 1);
if (!mbuf)
{
err = gpg_error_from_syserror ();
goto leave;
}
/* Prepend numbers with a 0 if needed. */
if (mlen && (*m & 0x80))
{
*mbuf = 0;
memcpy (mbuf+1, m, mlen);
mlen++;
}
else
memcpy (mbuf, m, mlen);
ebuf = xtrymalloc (elen + 1);
if (!ebuf)
{
err = gpg_error_from_syserror ();
goto leave;
}
/* Prepend numbers with a 0 if needed. */
if (elen && (*e & 0x80))
{
*ebuf = 0;
memcpy (ebuf+1, e, elen);
elen++;
}
else
memcpy (ebuf, e, elen);
err = gcry_sexp_build (r_sexp, NULL, "(public-key(rsa(n%b)(e%b)))",
(int)mlen, mbuf, (int)elen, ebuf);
leave:
xfree (mbuf);
xfree (ebuf);
return err;
}
/* Determine KDF hash algorithm and KEK encryption algorithm by CURVE. */
static const unsigned char*
ecdh_params (const char *curve)
{
unsigned int nbits;
openpgp_curve_to_oid (curve, &nbits);
/* See RFC-6637 for those constants.
0x03: Number of bytes
0x01: Version for this parameter format
KDF algo
KEK algo
*/
if (nbits <= 256)
return (const unsigned char*)"\x03\x01\x08\x07";
else if (nbits <= 384)
return (const unsigned char*)"\x03\x01\x09\x08";
else
return (const unsigned char*)"\x03\x01\x0a\x09";
}
static gpg_error_t
ecc_read_pubkey (app_t app, ctrl_t ctrl, u32 created_at, int keyno,
const unsigned char *data, size_t datalen, gcry_sexp_t *r_sexp)
{
gpg_error_t err;
unsigned char *qbuf = NULL;
const unsigned char *ecc_q;
size_t ecc_q_len;
gcry_mpi_t oid = NULL;
int n;
const char *curve;
const char *oidstr;
const unsigned char *oidbuf;
size_t oid_len;
int algo;
const char *format;
ecc_q = find_tlv (data, datalen, 0x0086, &ecc_q_len);
if (!ecc_q)
{
log_error (_("response does not contain the EC public key\n"));
return gpg_error (GPG_ERR_CARD);
}
curve = app->app_local->keyattr[keyno].ecc.curve;
oidstr = openpgp_curve_to_oid (curve, NULL);
err = openpgp_oid_from_str (oidstr, &oid);
if (err)
return err;
oidbuf = gcry_mpi_get_opaque (oid, &n);
if (!oidbuf)
{
err = gpg_error_from_syserror ();
goto leave;
}
oid_len = (n+7)/8;
qbuf = xtrymalloc (ecc_q_len + 1);
if (!qbuf)
{
err = gpg_error_from_syserror ();
goto leave;
}
if ((app->app_local->keyattr[keyno].ecc.flags & ECC_FLAG_DJB_TWEAK))
{ /* Prepend 0x40 prefix. */
*qbuf = 0x40;
memcpy (qbuf+1, ecc_q, ecc_q_len);
ecc_q_len++;
}
else
memcpy (qbuf, ecc_q, ecc_q_len);
if (ctrl)
{
send_key_data (ctrl, "q", qbuf, ecc_q_len);
send_key_data (ctrl, "curve", oidbuf, oid_len);
}
if (keyno == 1)
{
if (ctrl)
send_key_data (ctrl, "kdf/kek", ecdh_params (curve), (size_t)4);
algo = PUBKEY_ALGO_ECDH;
}
else
{
if ((app->app_local->keyattr[keyno].ecc.flags & ECC_FLAG_DJB_TWEAK))
algo = PUBKEY_ALGO_EDDSA;
else
algo = PUBKEY_ALGO_ECDSA;
}
if (ctrl)
{
unsigned char fprbuf[20];
err = store_fpr (app, keyno, created_at, fprbuf, algo, oidbuf, oid_len,
qbuf, ecc_q_len, ecdh_params (curve), (size_t)4);
if (err)
goto leave;
send_fpr_if_not_null (ctrl, "KEY-FPR", -1, fprbuf);
}
if (!(app->app_local->keyattr[keyno].ecc.flags & ECC_FLAG_DJB_TWEAK))
format = "(public-key(ecc(curve%s)(q%b)))";
else if (keyno == 1)
format = "(public-key(ecc(curve%s)(flags djb-tweak)(q%b)))";
else
format = "(public-key(ecc(curve%s)(flags eddsa)(q%b)))";
err = gcry_sexp_build (r_sexp, NULL, format,
app->app_local->keyattr[keyno].ecc.curve,
(int)ecc_q_len, qbuf);
leave:
gcry_mpi_release (oid);
xfree (qbuf);
return err;
}
/* Parse tag-length-value data for public key in BUFFER of BUFLEN
length. Key of KEYNO in APP is updated with an S-expression of
public key. When CTRL is not NULL, fingerprint is computed with
CREATED_AT, and fingerprint is written to the card, and key data
and fingerprint are send back to the client side.
*/
static gpg_error_t
read_public_key (app_t app, ctrl_t ctrl, u32 created_at, int keyno,
const unsigned char *buffer, size_t buflen)
{
gpg_error_t err;
const unsigned char *data;
size_t datalen;
gcry_sexp_t s_pkey = NULL;
data = find_tlv (buffer, buflen, 0x7F49, &datalen);
if (!data)
{
log_error (_("response does not contain the public key data\n"));
return gpg_error (GPG_ERR_CARD);
}
if (app->app_local->keyattr[keyno].key_type == KEY_TYPE_RSA)
err = rsa_read_pubkey (app, ctrl, created_at, keyno,
data, datalen, &s_pkey);
else if (app->app_local->keyattr[keyno].key_type == KEY_TYPE_ECC)
err = ecc_read_pubkey (app, ctrl, created_at, keyno,
data, datalen, &s_pkey);
else
err = gpg_error (GPG_ERR_NOT_IMPLEMENTED);
if (!err)
{
unsigned char *keybuf;
size_t len;
len = gcry_sexp_sprint (s_pkey, GCRYSEXP_FMT_CANON, NULL, 0);
keybuf = xtrymalloc (len);
if (!data)
{
err = gpg_error_from_syserror ();
gcry_sexp_release (s_pkey);
return err;
}
gcry_sexp_sprint (s_pkey, GCRYSEXP_FMT_CANON, keybuf, len);
gcry_sexp_release (s_pkey);
app->app_local->pk[keyno].key = keybuf;
/* Decrement for trailing '\0' */
app->app_local->pk[keyno].keylen = len - 1;
}
return err;
}
/* Get the public key for KEYNO and store it as an S-expression with
the APP handle. On error that field gets cleared. If we already
know about the public key we will just return. Note that this does
not mean a key is available; this is solely indicated by the
presence of the app->app_local->pk[KEYNO].key field.
Note that GnuPG 1.x does not need this and it would be too time
consuming to send it just for the fun of it. However, given that we
use the same code in gpg 1.4, we can't use the gcry S-expression
here but need to open encode it. */
#if GNUPG_MAJOR_VERSION > 1
static gpg_error_t
get_public_key (app_t app, int keyno)
{
gpg_error_t err = 0;
unsigned char *buffer;
const unsigned char *m, *e;
size_t buflen;
size_t mlen = 0;
size_t elen = 0;
char *keybuf = NULL;
gcry_sexp_t s_pkey;
size_t len;
if (keyno < 0 || keyno > 2)
return gpg_error (GPG_ERR_INV_ID);
/* Already cached? */
if (app->app_local->pk[keyno].read_done)
return 0;
xfree (app->app_local->pk[keyno].key);
app->app_local->pk[keyno].key = NULL;
app->app_local->pk[keyno].keylen = 0;
m = e = NULL; /* (avoid cc warning) */
if (app->card_version > 0x0100)
{
int exmode, le_value;
/* We may simply read the public key out of these cards. */
if (app->app_local->cardcap.ext_lc_le
&& app->app_local->keyattr[keyno].key_type == KEY_TYPE_RSA
&& app->app_local->keyattr[keyno].rsa.n_bits > RSA_SMALL_SIZE_KEY)
{
exmode = 1; /* Use extended length. */
le_value = determine_rsa_response (app, keyno);
}
else
{
exmode = 0;
le_value = 256; /* Use legacy value. */
}
err = iso7816_read_public_key (app->slot, exmode,
(keyno == 0? "\xB6" :
keyno == 1? "\xB8" : "\xA4"),
2, le_value, &buffer, &buflen);
if (err)
{
log_error (_("reading public key failed: %s\n"), gpg_strerror (err));
goto leave;
}
err = read_public_key (app, NULL, 0U, keyno, buffer, buflen);
}
else
{
/* Due to a design problem in v1.0 cards we can't get the public
key out of these cards without doing a verify on CHV3.
Clearly that is not an option and thus we try to locate the
key using an external helper.
The helper we use here is gpg itself, which should know about
the key in any case. */
char fpr[41];
char *hexkeyid;
char *command = NULL;
FILE *fp;
int ret;
buffer = NULL; /* We don't need buffer. */
err = retrieve_fpr_from_card (app, keyno, fpr);
if (err)
{
log_error ("error while retrieving fpr from card: %s\n",
gpg_strerror (err));
goto leave;
}
hexkeyid = fpr + 24;
ret = gpgrt_asprintf
(&command, "gpg --list-keys --with-colons --with-key-data '%s'", fpr);
if (ret < 0)
{
err = gpg_error_from_syserror ();
goto leave;
}
fp = popen (command, "r");
xfree (command);
if (!fp)
{
err = gpg_error_from_syserror ();
log_error ("running gpg failed: %s\n", gpg_strerror (err));
goto leave;
}
err = retrieve_key_material (fp, hexkeyid, &m, &mlen, &e, &elen);
pclose (fp);
if (err)
{
log_error ("error while retrieving key material through pipe: %s\n",
gpg_strerror (err));
goto leave;
}
err = gcry_sexp_build (&s_pkey, NULL, "(public-key(rsa(n%b)(e%b)))",
(int)mlen, m, (int)elen, e);
if (err)
goto leave;
len = gcry_sexp_sprint (s_pkey, GCRYSEXP_FMT_CANON, NULL, 0);
keybuf = xtrymalloc (len);
if (!keybuf)
{
err = gpg_error_from_syserror ();
gcry_sexp_release (s_pkey);
goto leave;
}
gcry_sexp_sprint (s_pkey, GCRYSEXP_FMT_CANON, keybuf, len);
gcry_sexp_release (s_pkey);
app->app_local->pk[keyno].key = (unsigned char*)keybuf;
/* Decrement for trailing '\0' */
app->app_local->pk[keyno].keylen = len - 1;
}
leave:
/* Set a flag to indicate that we tried to read the key. */
app->app_local->pk[keyno].read_done = 1;
xfree (buffer);
return err;
}
#endif /* GNUPG_MAJOR_VERSION > 1 */
/* Send the KEYPAIRINFO back. KEY needs to be in the range [1,3].
This is used by the LEARN command. */
static gpg_error_t
send_keypair_info (app_t app, ctrl_t ctrl, int key)
{
int keyno = key - 1;
gpg_error_t err = 0;
/* Note that GnuPG 1.x does not need this and it would be too time
consuming to send it just for the fun of it. */
#if GNUPG_MAJOR_VERSION > 1
unsigned char grip[20];
char gripstr[41];
char idbuf[50];
err = get_public_key (app, keyno);
if (err)
goto leave;
assert (keyno >= 0 && keyno <= 2);
if (!app->app_local->pk[keyno].key)
goto leave; /* No such key - ignore. */
err = keygrip_from_canon_sexp (app->app_local->pk[keyno].key,
app->app_local->pk[keyno].keylen,
grip);
if (err)
goto leave;
bin2hex (grip, 20, gripstr);
sprintf (idbuf, "OPENPGP.%d", keyno+1);
send_status_info (ctrl, "KEYPAIRINFO",
gripstr, 40,
idbuf, strlen (idbuf),
NULL, (size_t)0);
leave:
#endif /* GNUPG_MAJOR_VERSION > 1 */
return err;
}
/* Handle the LEARN command for OpenPGP. */
static gpg_error_t
do_learn_status (app_t app, ctrl_t ctrl, unsigned int flags)
{
(void)flags;
do_getattr (app, ctrl, "EXTCAP");
do_getattr (app, ctrl, "DISP-NAME");
do_getattr (app, ctrl, "DISP-LANG");
do_getattr (app, ctrl, "DISP-SEX");
do_getattr (app, ctrl, "PUBKEY-URL");
do_getattr (app, ctrl, "LOGIN-DATA");
do_getattr (app, ctrl, "KEY-FPR");
if (app->card_version > 0x0100)
do_getattr (app, ctrl, "KEY-TIME");
do_getattr (app, ctrl, "CA-FPR");
do_getattr (app, ctrl, "CHV-STATUS");
do_getattr (app, ctrl, "SIG-COUNTER");
if (app->app_local->extcap.kdf_do)
do_getattr (app, ctrl, "KDF");
if (app->app_local->extcap.has_button)
{
do_getattr (app, ctrl, "UIF-1");
do_getattr (app, ctrl, "UIF-2");
do_getattr (app, ctrl, "UIF-3");
}
if (app->app_local->extcap.private_dos)
{
do_getattr (app, ctrl, "PRIVATE-DO-1");
do_getattr (app, ctrl, "PRIVATE-DO-2");
if (app->did_chv2)
do_getattr (app, ctrl, "PRIVATE-DO-3");
if (app->did_chv3)
do_getattr (app, ctrl, "PRIVATE-DO-4");
}
send_keypair_info (app, ctrl, 1);
send_keypair_info (app, ctrl, 2);
send_keypair_info (app, ctrl, 3);
/* Note: We do not send the Cardholder Certificate, because that is
relatively long and for OpenPGP applications not really needed. */
return 0;
}
/* Handle the READKEY command for OpenPGP. On success a canonical
encoded S-expression with the public key will get stored at PK and
its length (for assertions) at PKLEN; the caller must release that
buffer. On error PK and PKLEN are not changed and an error code is
returned. */
static gpg_error_t
do_readkey (app_t app, int advanced, const char *keyid,
unsigned char **pk, size_t *pklen)
{
#if GNUPG_MAJOR_VERSION > 1
gpg_error_t err;
int keyno;
unsigned char *buf;
if (!strcmp (keyid, "OPENPGP.1"))
keyno = 0;
else if (!strcmp (keyid, "OPENPGP.2"))
keyno = 1;
else if (!strcmp (keyid, "OPENPGP.3"))
keyno = 2;
else
return gpg_error (GPG_ERR_INV_ID);
err = get_public_key (app, keyno);
if (err)
return err;
buf = app->app_local->pk[keyno].key;
if (!buf)
return gpg_error (GPG_ERR_NO_PUBKEY);
if (advanced)
{
gcry_sexp_t s_key;
err = gcry_sexp_new (&s_key, buf, app->app_local->pk[keyno].keylen, 0);
if (err)
return err;
*pklen = gcry_sexp_sprint (s_key, GCRYSEXP_FMT_ADVANCED, NULL, 0);
*pk = xtrymalloc (*pklen);
if (!*pk)
{
err = gpg_error_from_syserror ();
*pklen = 0;
return err;
}
gcry_sexp_sprint (s_key, GCRYSEXP_FMT_ADVANCED, *pk, *pklen);
gcry_sexp_release (s_key);
/* Decrement for trailing '\0' */
*pklen = *pklen - 1;
}
else
{
*pklen = app->app_local->pk[keyno].keylen;
*pk = xtrymalloc (*pklen);
if (!*pk)
{
err = gpg_error_from_syserror ();
*pklen = 0;
return err;
}
memcpy (*pk, buf, *pklen);
}
return 0;
#else
return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
#endif
}
/* Read the standard certificate of an OpenPGP v2 card. It is
returned in a freshly allocated buffer with that address stored at
CERT and the length of the certificate stored at CERTLEN. CERTID
needs to be set to "OPENPGP.3". */
static gpg_error_t
do_readcert (app_t app, const char *certid,
unsigned char **cert, size_t *certlen)
{
#if GNUPG_MAJOR_VERSION > 1
gpg_error_t err;
unsigned char *buffer;
size_t buflen;
void *relptr;
*cert = NULL;
*certlen = 0;
if (strcmp (certid, "OPENPGP.3"))
return gpg_error (GPG_ERR_INV_ID);
if (!app->app_local->extcap.is_v2)
return gpg_error (GPG_ERR_NOT_FOUND);
relptr = get_one_do (app, 0x7F21, &buffer, &buflen, NULL);
if (!relptr)
return gpg_error (GPG_ERR_NOT_FOUND);
if (!buflen)
err = gpg_error (GPG_ERR_NOT_FOUND);
else if (!(*cert = xtrymalloc (buflen)))
err = gpg_error_from_syserror ();
else
{
memcpy (*cert, buffer, buflen);
*certlen = buflen;
err = 0;
}
xfree (relptr);
return err;
#else
return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
#endif
}
/* Decide if we use the pinpad of the reader for PIN input according
to the user preference on the card, and the capability of the
reader. This routine is only called when the reader has pinpad.
Returns 0 if we use pinpad, 1 otherwise. */
static int
check_pinpad_request (app_t app, pininfo_t *pininfo, int admin_pin)
{
if (app->app_local->pinpad.specified == 0) /* No preference on card. */
{
if (pininfo->fixedlen == 0) /* Reader has varlen capability. */
return 0; /* Then, use pinpad. */
else
/*
* Reader has limited capability, and it may not match PIN of
* the card.
*/
return 1;
}
if (admin_pin)
pininfo->fixedlen = app->app_local->pinpad.fixedlen_admin;
else
pininfo->fixedlen = app->app_local->pinpad.fixedlen_user;
if (pininfo->fixedlen == 0 /* User requests disable pinpad. */
|| pininfo->fixedlen < pininfo->minlen
|| pininfo->fixedlen > pininfo->maxlen
/* Reader doesn't have the capability to input a PIN which
* length is FIXEDLEN. */)
return 1;
return 0;
}
/* Return a string with information about the card for use in a
* prompt. Returns NULL on memory failure. */
static char *
get_prompt_info (app_t app, int chvno, unsigned long sigcount, int remaining)
{
char *serial, *disp_name, *rembuf, *tmpbuf, *result;
serial = get_disp_serialno (app);
if (!serial)
return NULL;
disp_name = get_disp_name (app);
if (chvno == 1)
{
/* TRANSLATORS: Put a \x1f right before a colon. This can be
* used by pinentry to nicely align the names and values. Keep
* the %s at the start and end of the string. */
result = xtryasprintf (_("%s"
"Number\x1f: %s%%0A"
"Holder\x1f: %s%%0A"
"Counter\x1f: %lu"
"%s"),
"\x1e",
serial,
disp_name? disp_name:"",
sigcount,
"");
}
else
{
result = xtryasprintf (_("%s"
"Number\x1f: %s%%0A"
"Holder\x1f: %s"
"%s"),
"\x1e",
serial,
disp_name? disp_name:"",
"");
}
xfree (disp_name);
xfree (serial);
if (remaining != -1)
{
/* TRANSLATORS: This is the number of remaining attempts to
* enter a PIN. Use %%0A (double-percent,0A) for a linefeed. */
rembuf = xtryasprintf (_("Remaining attempts: %d"), remaining);
if (!rembuf)
{
xfree (result);
return NULL;
}
tmpbuf = strconcat (result, "%0A%0A", rembuf, NULL);
xfree (rembuf);
if (!tmpbuf)
{
xfree (result);
return NULL;
}
xfree (result);
result = tmpbuf;
}
return result;
}
#define KDF_DATA_LENGTH_MIN 90
#define KDF_DATA_LENGTH_MAX 110
/* Compute hash if KDF-DO is available. CHVNO must be 0 for reset
code, 1 or 2 for user pin and 3 for admin pin.
*/
static gpg_error_t
pin2hash_if_kdf (app_t app, int chvno, char *pinvalue, int *r_pinlen)
{
gpg_error_t err = 0;
void *relptr = NULL;
unsigned char *buffer;
size_t buflen;
if (app->app_local->extcap.kdf_do
&& (relptr = get_one_do (app, 0x00F9, &buffer, &buflen, NULL))
&& buflen >= KDF_DATA_LENGTH_MIN && (buffer[2] == 0x03))
{
const char *salt;
unsigned long s2k_count;
char dek[32];
int salt_index;
s2k_count = (((unsigned int)buffer[8] << 24)
| (buffer[9] << 16) | (buffer[10] << 8) | buffer[11]);
if (buflen == KDF_DATA_LENGTH_MIN)
salt_index =14;
else if (buflen == KDF_DATA_LENGTH_MAX)
salt_index = (chvno==3 ? 34 : (chvno==0 ? 24 : 14));
else
{
err = gpg_error (GPG_ERR_INV_DATA);
goto leave;
}
salt = &buffer[salt_index];
err = gcry_kdf_derive (pinvalue, strlen (pinvalue),
GCRY_KDF_ITERSALTED_S2K,
DIGEST_ALGO_SHA256, salt, 8,
s2k_count, sizeof (dek), dek);
if (!err)
{
/* pinvalue has a buffer of MAXLEN_PIN+1, 32 is OK. */
*r_pinlen = 32;
memcpy (pinvalue, dek, *r_pinlen);
wipememory (dek, *r_pinlen);
}
}
else
*r_pinlen = strlen (pinvalue);
leave:
xfree (relptr);
return err;
}
/* Verify a CHV either using the pinentry or if possible by
using a pinpad. PINCB and PINCB_ARG describe the usual callback
for the pinentry. CHVNO must be either 1 or 2. SIGCOUNT is only
used with CHV1. PINVALUE is the address of a pointer which will
receive a newly allocated block with the actual PIN (this is useful
in case that PIN shall be used for another verify operation). The
caller needs to free this value. If the function returns with
success and NULL is stored at PINVALUE, the caller should take this
as an indication that the pinpad has been used.
*/
static gpg_error_t
verify_a_chv (app_t app,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg, int chvno, unsigned long sigcount,
char **pinvalue, int *pinlen)
{
int rc = 0;
char *prompt_buffer = NULL;
const char *prompt;
pininfo_t pininfo;
int minlen = 6;
int remaining;
log_assert (chvno == 1 || chvno == 2);
*pinvalue = NULL;
*pinlen = 0;
remaining = get_remaining_tries (app, 0);
if (remaining == -1)
return gpg_error (GPG_ERR_CARD);
if (chvno == 2 && app->app_local->flags.def_chv2)
{
/* Special case for def_chv2 mechanism. */
if (opt.verbose)
log_info (_("using default PIN as %s\n"), "CHV2");
rc = iso7816_verify (app->slot, 0x82, "123456", 6);
if (rc)
{
/* Verification of CHV2 with the default PIN failed,
although the card pretends to have the default PIN set as
CHV2. We better disable the def_chv2 flag now. */
log_info (_("failed to use default PIN as %s: %s"
" - disabling further default use\n"),
"CHV2", gpg_strerror (rc));
app->app_local->flags.def_chv2 = 0;
}
return rc;
}
memset (&pininfo, 0, sizeof pininfo);
pininfo.fixedlen = -1;
pininfo.minlen = minlen;
{
const char *firstline = _("||Please unlock the card");
char *infoblock = get_prompt_info (app, chvno, sigcount,
remaining < 3? remaining : -1);
prompt_buffer = strconcat (firstline, "%0A%0A", infoblock, NULL);
if (prompt_buffer)
prompt = prompt_buffer;
else
prompt = firstline; /* ENOMEM fallback. */
xfree (infoblock);
}
if (!opt.disable_pinpad
&& !iso7816_check_pinpad (app->slot, ISO7816_VERIFY, &pininfo)
&& !check_pinpad_request (app, &pininfo, 0))
{
/* The reader supports the verify command through the pinpad.
Note that the pincb appends a text to the prompt telling the
user to use the pinpad. */
rc = pincb (pincb_arg, prompt, NULL);
prompt = NULL;
xfree (prompt_buffer);
prompt_buffer = NULL;
if (rc)
{
log_info (_("PIN callback returned error: %s\n"),
gpg_strerror (rc));
return rc;
}
rc = iso7816_verify_kp (app->slot, 0x80+chvno, &pininfo);
/* Dismiss the prompt. */
pincb (pincb_arg, NULL, NULL);
log_assert (!*pinvalue);
}
else
{
/* The reader has no pinpad or we don't want to use it. */
rc = pincb (pincb_arg, prompt, pinvalue);
prompt = NULL;
xfree (prompt_buffer);
prompt_buffer = NULL;
if (rc)
{
log_info (_("PIN callback returned error: %s\n"),
gpg_strerror (rc));
return rc;
}
if (strlen (*pinvalue) < minlen)
{
log_error (_("PIN for CHV%d is too short;"
" minimum length is %d\n"), chvno, minlen);
xfree (*pinvalue);
*pinvalue = NULL;
return gpg_error (GPG_ERR_BAD_PIN);
}
rc = pin2hash_if_kdf (app, chvno, *pinvalue, pinlen);
if (!rc)
rc = iso7816_verify (app->slot, 0x80+chvno, *pinvalue, *pinlen);
}
if (rc)
{
log_error (_("verify CHV%d failed: %s\n"), chvno, gpg_strerror (rc));
xfree (*pinvalue);
*pinvalue = NULL;
flush_cache_after_error (app);
}
return rc;
}
/* Verify CHV2 if required. Depending on the configuration of the
card CHV1 will also be verified. */
static gpg_error_t
verify_chv2 (app_t app,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
int rc;
char *pinvalue;
int pinlen;
if (app->did_chv2)
return 0; /* We already verified CHV2. */
rc = verify_a_chv (app, pincb, pincb_arg, 2, 0, &pinvalue, &pinlen);
if (rc)
return rc;
app->did_chv2 = 1;
if (!app->did_chv1 && !app->force_chv1 && pinvalue)
{
/* For convenience we verify CHV1 here too. We do this only if
the card is not configured to require a verification before
each CHV1 controlled operation (force_chv1) and if we are not
using the pinpad (PINVALUE == NULL). */
rc = iso7816_verify (app->slot, 0x81, pinvalue, pinlen);
if (gpg_err_code (rc) == GPG_ERR_BAD_PIN)
rc = gpg_error (GPG_ERR_PIN_NOT_SYNCED);
if (rc)
{
log_error (_("verify CHV%d failed: %s\n"), 1, gpg_strerror (rc));
flush_cache_after_error (app);
}
else
app->did_chv1 = 1;
}
xfree (pinvalue);
return rc;
}
/* Build the prompt to enter the Admin PIN. The prompt depends on the
current sdtate of the card. */
static gpg_error_t
build_enter_admin_pin_prompt (app_t app, char **r_prompt)
{
int remaining;
char *prompt;
char *infoblock;
*r_prompt = NULL;
remaining = get_remaining_tries (app, 1);
if (remaining == -1)
return gpg_error (GPG_ERR_CARD);
if (!remaining)
{
log_info (_("card is permanently locked!\n"));
return gpg_error (GPG_ERR_BAD_PIN);
}
log_info (ngettext("%d Admin PIN attempt remaining before card"
" is permanently locked\n",
"%d Admin PIN attempts remaining before card"
" is permanently locked\n",
remaining), remaining);
infoblock = get_prompt_info (app, 3, 0, remaining < 3? remaining : -1);
/* TRANSLATORS: Do not translate the "|A|" prefix but keep it at
the start of the string. Use %0A (single percent) for a linefeed. */
prompt = strconcat (_("|A|Please enter the Admin PIN"),
"%0A%0A", infoblock, NULL);
xfree (infoblock);
if (!prompt)
return gpg_error_from_syserror ();
*r_prompt = prompt;
return 0;
}
/* Verify CHV3 if required. */
static gpg_error_t
verify_chv3 (app_t app,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
int rc = 0;
#if GNUPG_MAJOR_VERSION != 1
if (!opt.allow_admin)
{
log_info (_("access to admin commands is not configured\n"));
return gpg_error (GPG_ERR_EACCES);
}
#endif
if (!app->did_chv3)
{
pininfo_t pininfo;
int minlen = 8;
char *prompt;
memset (&pininfo, 0, sizeof pininfo);
pininfo.fixedlen = -1;
pininfo.minlen = minlen;
rc = build_enter_admin_pin_prompt (app, &prompt);
if (rc)
return rc;
if (!opt.disable_pinpad
&& !iso7816_check_pinpad (app->slot, ISO7816_VERIFY, &pininfo)
&& !check_pinpad_request (app, &pininfo, 1))
{
/* The reader supports the verify command through the pinpad. */
rc = pincb (pincb_arg, prompt, NULL);
xfree (prompt);
prompt = NULL;
if (rc)
{
log_info (_("PIN callback returned error: %s\n"),
gpg_strerror (rc));
return rc;
}
rc = iso7816_verify_kp (app->slot, 0x83, &pininfo);
/* Dismiss the prompt. */
pincb (pincb_arg, NULL, NULL);
}
else
{
char *pinvalue;
int pinlen;
rc = pincb (pincb_arg, prompt, &pinvalue);
xfree (prompt);
prompt = NULL;
if (rc)
{
log_info (_("PIN callback returned error: %s\n"),
gpg_strerror (rc));
return rc;
}
if (strlen (pinvalue) < minlen)
{
log_error (_("PIN for CHV%d is too short;"
" minimum length is %d\n"), 3, minlen);
xfree (pinvalue);
return gpg_error (GPG_ERR_BAD_PIN);
}
rc = pin2hash_if_kdf (app, 3, pinvalue, &pinlen);
if (!rc)
rc = iso7816_verify (app->slot, 0x83, pinvalue, pinlen);
xfree (pinvalue);
}
if (rc)
{
log_error (_("verify CHV%d failed: %s\n"), 3, gpg_strerror (rc));
flush_cache_after_error (app);
return rc;
}
app->did_chv3 = 1;
}
return rc;
}
/* Handle the SETATTR operation. All arguments are already basically
checked. */
static gpg_error_t
do_setattr (app_t app, const char *name,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const unsigned char *value, size_t valuelen)
{
gpg_error_t rc;
int idx;
static struct {
const char *name;
int tag;
int need_chv;
int special;
unsigned int need_v2:1;
} table[] = {
{ "DISP-NAME", 0x005B, 3 },
{ "LOGIN-DATA", 0x005E, 3, 2 },
{ "DISP-LANG", 0x5F2D, 3 },
{ "DISP-SEX", 0x5F35, 3 },
{ "PUBKEY-URL", 0x5F50, 3 },
{ "CHV-STATUS-1", 0x00C4, 3, 1 },
{ "CA-FPR-1", 0x00CA, 3 },
{ "CA-FPR-2", 0x00CB, 3 },
{ "CA-FPR-3", 0x00CC, 3 },
{ "PRIVATE-DO-1", 0x0101, 2 },
{ "PRIVATE-DO-2", 0x0102, 3 },
{ "PRIVATE-DO-3", 0x0103, 2 },
{ "PRIVATE-DO-4", 0x0104, 3 },
{ "CERT-3", 0x7F21, 3, 0, 1 },
{ "SM-KEY-ENC", 0x00D1, 3, 0, 1 },
{ "SM-KEY-MAC", 0x00D2, 3, 0, 1 },
{ "KEY-ATTR", 0, 0, 3, 1 },
{ "AESKEY", 0x00D5, 3, 0, 1 },
{ "UIF-1", 0x00D6, 3, 5, 1 },
{ "UIF-2", 0x00D7, 3, 5, 1 },
{ "UIF-3", 0x00D8, 3, 5, 1 },
{ "KDF", 0x00F9, 3, 4, 1 },
{ NULL, 0 }
};
int exmode;
for (idx=0; table[idx].name && strcmp (table[idx].name, name); idx++)
;
if (!table[idx].name)
return gpg_error (GPG_ERR_INV_NAME);
if (table[idx].need_v2 && !app->app_local->extcap.is_v2)
return gpg_error (GPG_ERR_NOT_SUPPORTED); /* Not yet supported. */
if (table[idx].special == 5 && app->app_local->extcap.has_button == 0)
return gpg_error (GPG_ERR_INV_OBJ);
if (table[idx].special == 3)
return change_keyattr_from_string (app, pincb, pincb_arg, value, valuelen);
switch (table[idx].need_chv)
{
case 2:
rc = verify_chv2 (app, pincb, pincb_arg);
break;
case 3:
rc = verify_chv3 (app, pincb, pincb_arg);
break;
default:
rc = 0;
}
if (rc)
return rc;
/* Flush the cache before writing it, so that the next get operation
will reread the data from the card and thus get synced in case of
errors (e.g. data truncated by the card). */
flush_cache_item (app, table[idx].tag);
if (app->app_local->cardcap.ext_lc_le && valuelen > 254)
exmode = 1; /* Use extended length w/o a limit. */
else if (app->app_local->cardcap.cmd_chaining && valuelen > 254)
exmode = -254; /* Command chaining with max. 254 bytes. */
else
exmode = 0;
rc = iso7816_put_data (app->slot, exmode, table[idx].tag, value, valuelen);
if (rc)
log_error ("failed to set '%s': %s\n", table[idx].name, gpg_strerror (rc));
if (table[idx].special == 1)
app->force_chv1 = (valuelen && *value == 0);
else if (table[idx].special == 2)
parse_login_data (app);
else if (table[idx].special == 4)
{
app->did_chv1 = 0;
app->did_chv2 = 0;
app->did_chv3 = 0;
}
return rc;
}
/* Handle the WRITECERT command for OpenPGP. This writes the standard
* certificate to the card; CERTID needs to be set to "OPENPGP.3".
* PINCB and PINCB_ARG are the usual arguments for the pinentry
* callback. */
static gpg_error_t
do_writecert (app_t app, ctrl_t ctrl,
const char *certidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const unsigned char *certdata, size_t certdatalen)
{
(void)ctrl;
#if GNUPG_MAJOR_VERSION > 1
if (strcmp (certidstr, "OPENPGP.3"))
return gpg_error (GPG_ERR_INV_ID);
if (!certdata || !certdatalen)
return gpg_error (GPG_ERR_INV_ARG);
if (!app->app_local->extcap.is_v2)
return gpg_error (GPG_ERR_NOT_SUPPORTED);
if (certdatalen > app->app_local->extcap.max_certlen_3)
return gpg_error (GPG_ERR_TOO_LARGE);
return do_setattr (app, "CERT-3", pincb, pincb_arg, certdata, certdatalen);
#else
return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
#endif
}
/* Handle the PASSWD command. The following combinations are
possible:
Flags CHVNO Vers. Description
RESET 1 1 Verify CHV3 and set a new CHV1 and CHV2
RESET 1 2 Verify PW3 and set a new PW1.
RESET 2 1 Verify CHV3 and set a new CHV1 and CHV2.
RESET 2 2 Verify PW3 and set a new Reset Code.
RESET 3 any Returns GPG_ERR_INV_ID.
- 1 1 Verify CHV2 and set a new CHV1 and CHV2.
- 1 2 Verify PW1 and set a new PW1.
- 2 1 Verify CHV2 and set a new CHV1 and CHV2.
- 2 2 Verify Reset Code and set a new PW1.
- 3 any Verify CHV3/PW3 and set a new CHV3/PW3.
*/
static gpg_error_t
do_change_pin (app_t app, ctrl_t ctrl, const char *chvnostr,
unsigned int flags,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
int rc = 0;
int chvno = atoi (chvnostr);
char *resetcode = NULL;
char *oldpinvalue = NULL;
char *pinvalue = NULL;
int reset_mode = !!(flags & APP_CHANGE_FLAG_RESET);
int set_resetcode = 0;
pininfo_t pininfo;
int use_pinpad = 0;
int minlen = 6;
int pinlen0 = 0;
int pinlen = 0;
(void)ctrl;
+
memset (&pininfo, 0, sizeof pininfo);
pininfo.fixedlen = -1;
pininfo.minlen = minlen;
+ if ((flags & APP_CHANGE_FLAG_CLEAR))
+ return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
+
if (reset_mode && chvno == 3)
{
rc = gpg_error (GPG_ERR_INV_ID);
goto leave;
}
if (!app->app_local->extcap.is_v2)
{
/* Version 1 cards. */
if (reset_mode || chvno == 3)
{
/* We always require that the PIN is entered. */
app->did_chv3 = 0;
rc = verify_chv3 (app, pincb, pincb_arg);
if (rc)
goto leave;
}
else if (chvno == 1 || chvno == 2)
{
/* On a v1.x card CHV1 and CVH2 should always have the same
value, thus we enforce it here. */
int save_force = app->force_chv1;
app->force_chv1 = 0;
app->did_chv1 = 0;
app->did_chv2 = 0;
rc = verify_chv2 (app, pincb, pincb_arg);
app->force_chv1 = save_force;
if (rc)
goto leave;
}
else
{
rc = gpg_error (GPG_ERR_INV_ID);
goto leave;
}
}
else
{
/* Version 2 cards. */
if (!opt.disable_pinpad
&& !iso7816_check_pinpad (app->slot,
ISO7816_CHANGE_REFERENCE_DATA, &pininfo)
&& !check_pinpad_request (app, &pininfo, chvno == 3))
use_pinpad = 1;
if (reset_mode)
{
/* To reset a PIN the Admin PIN is required. */
use_pinpad = 0;
app->did_chv3 = 0;
rc = verify_chv3 (app, pincb, pincb_arg);
if (rc)
goto leave;
if (chvno == 2)
set_resetcode = 1;
}
else if (chvno == 1 || chvno == 3)
{
if (!use_pinpad)
{
char *promptbuf = NULL;
const char *prompt;
if (chvno == 3)
{
minlen = 8;
rc = build_enter_admin_pin_prompt (app, &promptbuf);
if (rc)
goto leave;
prompt = promptbuf;
}
else
prompt = _("||Please enter the PIN");
rc = pincb (pincb_arg, prompt, &oldpinvalue);
xfree (promptbuf);
promptbuf = NULL;
if (rc)
{
log_info (_("PIN callback returned error: %s\n"),
gpg_strerror (rc));
goto leave;
}
if (strlen (oldpinvalue) < minlen)
{
log_info (_("PIN for CHV%d is too short;"
" minimum length is %d\n"), chvno, minlen);
rc = gpg_error (GPG_ERR_BAD_PIN);
goto leave;
}
}
}
else if (chvno == 2)
{
/* There is no PW2 for v2 cards. We use this condition to
allow a PW reset using the Reset Code. */
void *relptr;
unsigned char *value;
size_t valuelen;
int remaining;
use_pinpad = 0;
minlen = 8;
relptr = get_one_do (app, 0x00C4, &value, &valuelen, NULL);
if (!relptr || valuelen < 7)
{
log_error (_("error retrieving CHV status from card\n"));
xfree (relptr);
rc = gpg_error (GPG_ERR_CARD);
goto leave;
}
remaining = value[5];
xfree (relptr);
if (!remaining)
{
log_error (_("Reset Code not or not anymore available\n"));
rc = gpg_error (GPG_ERR_BAD_PIN);
goto leave;
}
rc = pincb (pincb_arg,
_("||Please enter the Reset Code for the card"),
&resetcode);
if (rc)
{
log_info (_("PIN callback returned error: %s\n"),
gpg_strerror (rc));
goto leave;
}
if (strlen (resetcode) < minlen)
{
log_info (_("Reset Code is too short; minimum length is %d\n"),
minlen);
rc = gpg_error (GPG_ERR_BAD_PIN);
goto leave;
}
}
else
{
rc = gpg_error (GPG_ERR_INV_ID);
goto leave;
}
}
if (chvno == 3)
app->did_chv3 = 0;
else
app->did_chv1 = app->did_chv2 = 0;
if (!use_pinpad)
{
/* TRANSLATORS: Do not translate the "|*|" prefixes but
keep it at the start of the string. We need this elsewhere
to get some infos on the string. */
rc = pincb (pincb_arg, set_resetcode? _("|RN|New Reset Code") :
chvno == 3? _("|AN|New Admin PIN") : _("|N|New PIN"),
&pinvalue);
if (rc || pinvalue == NULL)
{
log_error (_("error getting new PIN: %s\n"), gpg_strerror (rc));
goto leave;
}
}
if (resetcode)
{
char *buffer;
buffer = xtrymalloc (strlen (resetcode) + strlen (pinvalue) + 1);
if (!buffer)
rc = gpg_error_from_syserror ();
else
{
strcpy (buffer, resetcode);
rc = pin2hash_if_kdf (app, 0, buffer, &pinlen0);
if (!rc)
{
strcpy (buffer+pinlen0, pinvalue);
rc = pin2hash_if_kdf (app, 0, buffer+pinlen0, &pinlen);
}
if (!rc)
rc = iso7816_reset_retry_counter_with_rc (app->slot, 0x81,
buffer, pinlen0+pinlen);
wipememory (buffer, pinlen0 + pinlen);
xfree (buffer);
}
}
else if (set_resetcode)
{
if (strlen (pinvalue) < 8)
{
log_error (_("Reset Code is too short; minimum length is %d\n"), 8);
rc = gpg_error (GPG_ERR_BAD_PIN);
}
else
{
rc = pin2hash_if_kdf (app, 0, pinvalue, &pinlen);
if (!rc)
rc = iso7816_put_data (app->slot, 0, 0xD3, pinvalue, pinlen);
}
}
else if (reset_mode)
{
rc = pin2hash_if_kdf (app, 1, pinvalue, &pinlen);
if (!rc)
rc = iso7816_reset_retry_counter (app->slot, 0x81, pinvalue, pinlen);
if (!rc && !app->app_local->extcap.is_v2)
rc = iso7816_reset_retry_counter (app->slot, 0x82, pinvalue, pinlen);
}
else if (!app->app_local->extcap.is_v2)
{
/* Version 1 cards. */
if (chvno == 1 || chvno == 2)
{
rc = iso7816_change_reference_data (app->slot, 0x81, NULL, 0,
pinvalue, strlen (pinvalue));
if (!rc)
rc = iso7816_change_reference_data (app->slot, 0x82, NULL, 0,
pinvalue, strlen (pinvalue));
}
else /* CHVNO == 3 */
{
rc = iso7816_change_reference_data (app->slot, 0x80 + chvno, NULL, 0,
pinvalue, strlen (pinvalue));
}
}
else
{
/* Version 2 cards. */
assert (chvno == 1 || chvno == 3);
if (use_pinpad)
{
rc = pincb (pincb_arg,
chvno == 3 ?
_("||Please enter the Admin PIN and New Admin PIN") :
_("||Please enter the PIN and New PIN"), NULL);
if (rc)
{
log_info (_("PIN callback returned error: %s\n"),
gpg_strerror (rc));
goto leave;
}
rc = iso7816_change_reference_data_kp (app->slot, 0x80 + chvno, 0,
&pininfo);
pincb (pincb_arg, NULL, NULL); /* Dismiss the prompt. */
}
else
{
rc = pin2hash_if_kdf (app, chvno, oldpinvalue, &pinlen0);
if (!rc)
rc = pin2hash_if_kdf (app, chvno, pinvalue, &pinlen);
if (!rc)
rc = iso7816_change_reference_data (app->slot, 0x80 + chvno,
oldpinvalue, pinlen0,
pinvalue, pinlen);
}
}
if (pinvalue)
{
wipememory (pinvalue, pinlen);
xfree (pinvalue);
}
if (rc)
flush_cache_after_error (app);
leave:
if (resetcode)
{
wipememory (resetcode, strlen (resetcode));
xfree (resetcode);
}
if (oldpinvalue)
{
wipememory (oldpinvalue, pinlen0);
xfree (oldpinvalue);
}
return rc;
}
/* Check whether a key already exists. KEYIDX is the index of the key
(0..2). If FORCE is TRUE a diagnositic will be printed but no
error returned if the key already exists. The flag GENERATING is
only used to print correct messages. */
static gpg_error_t
does_key_exist (app_t app, int keyidx, int generating, int force)
{
const unsigned char *fpr;
unsigned char *buffer;
size_t buflen, n;
int i;
assert (keyidx >=0 && keyidx <= 2);
if (iso7816_get_data (app->slot, 0, 0x006E, &buffer, &buflen))
{
log_error (_("error reading application data\n"));
return gpg_error (GPG_ERR_GENERAL);
}
fpr = find_tlv (buffer, buflen, 0x00C5, &n);
if (!fpr || n < 60)
{
log_error (_("error reading fingerprint DO\n"));
xfree (buffer);
return gpg_error (GPG_ERR_GENERAL);
}
fpr += 20*keyidx;
for (i=0; i < 20 && !fpr[i]; i++)
;
xfree (buffer);
if (i!=20 && !force)
{
log_error (_("key already exists\n"));
return gpg_error (GPG_ERR_EEXIST);
}
else if (i!=20)
log_info (_("existing key will be replaced\n"));
else if (generating)
log_info (_("generating new key\n"));
else
log_info (_("writing new key\n"));
return 0;
}
/* Create a TLV tag and value and store it at BUFFER. Return the length
of tag and length. A LENGTH greater than 65535 is truncated. */
static size_t
add_tlv (unsigned char *buffer, unsigned int tag, size_t length)
{
unsigned char *p = buffer;
assert (tag <= 0xffff);
if ( tag > 0xff )
*p++ = tag >> 8;
*p++ = tag;
if (length < 128)
*p++ = length;
else if (length < 256)
{
*p++ = 0x81;
*p++ = length;
}
else
{
if (length > 0xffff)
length = 0xffff;
*p++ = 0x82;
*p++ = length >> 8;
*p++ = length;
}
return p - buffer;
}
static gpg_error_t
build_privkey_template (app_t app, int keyno,
const unsigned char *rsa_n, size_t rsa_n_len,
const unsigned char *rsa_e, size_t rsa_e_len,
const unsigned char *rsa_p, size_t rsa_p_len,
const unsigned char *rsa_q, size_t rsa_q_len,
const unsigned char *rsa_u, size_t rsa_u_len,
const unsigned char *rsa_dp, size_t rsa_dp_len,
const unsigned char *rsa_dq, size_t rsa_dq_len,
unsigned char **result, size_t *resultlen)
{
size_t rsa_e_reqlen;
unsigned char privkey[7*(1+3+3)];
size_t privkey_len;
unsigned char exthdr[2+2+3];
size_t exthdr_len;
unsigned char suffix[2+3];
size_t suffix_len;
unsigned char *tp;
size_t datalen;
unsigned char *template;
size_t template_size;
*result = NULL;
*resultlen = 0;
switch (app->app_local->keyattr[keyno].rsa.format)
{
case RSA_STD:
case RSA_STD_N:
case RSA_CRT:
case RSA_CRT_N:
break;
default:
return gpg_error (GPG_ERR_INV_VALUE);
}
/* Get the required length for E. Rounded up to the nearest byte */
rsa_e_reqlen = (app->app_local->keyattr[keyno].rsa.e_bits + 7) / 8;
assert (rsa_e_len <= rsa_e_reqlen);
/* Build the 7f48 cardholder private key template. */
datalen = 0;
tp = privkey;
tp += add_tlv (tp, 0x91, rsa_e_reqlen);
datalen += rsa_e_reqlen;
tp += add_tlv (tp, 0x92, rsa_p_len);
datalen += rsa_p_len;
tp += add_tlv (tp, 0x93, rsa_q_len);
datalen += rsa_q_len;
if (app->app_local->keyattr[keyno].rsa.format == RSA_CRT
|| app->app_local->keyattr[keyno].rsa.format == RSA_CRT_N)
{
tp += add_tlv (tp, 0x94, rsa_u_len);
datalen += rsa_u_len;
tp += add_tlv (tp, 0x95, rsa_dp_len);
datalen += rsa_dp_len;
tp += add_tlv (tp, 0x96, rsa_dq_len);
datalen += rsa_dq_len;
}
if (app->app_local->keyattr[keyno].rsa.format == RSA_STD_N
|| app->app_local->keyattr[keyno].rsa.format == RSA_CRT_N)
{
tp += add_tlv (tp, 0x97, rsa_n_len);
datalen += rsa_n_len;
}
privkey_len = tp - privkey;
/* Build the extended header list without the private key template. */
tp = exthdr;
*tp++ = keyno ==0 ? 0xb6 : keyno == 1? 0xb8 : 0xa4;
*tp++ = 0;
tp += add_tlv (tp, 0x7f48, privkey_len);
exthdr_len = tp - exthdr;
/* Build the 5f48 suffix of the data. */
tp = suffix;
tp += add_tlv (tp, 0x5f48, datalen);
suffix_len = tp - suffix;
/* Now concatenate everything. */
template_size = (1 + 3 /* 0x4d and len. */
+ exthdr_len
+ privkey_len
+ suffix_len
+ datalen);
tp = template = xtrymalloc_secure (template_size);
if (!template)
return gpg_error_from_syserror ();
tp += add_tlv (tp, 0x4d, exthdr_len + privkey_len + suffix_len + datalen);
memcpy (tp, exthdr, exthdr_len);
tp += exthdr_len;
memcpy (tp, privkey, privkey_len);
tp += privkey_len;
memcpy (tp, suffix, suffix_len);
tp += suffix_len;
memcpy (tp, rsa_e, rsa_e_len);
if (rsa_e_len < rsa_e_reqlen)
{
/* Right justify E. */
memmove (tp + rsa_e_reqlen - rsa_e_len, tp, rsa_e_len);
memset (tp, 0, rsa_e_reqlen - rsa_e_len);
}
tp += rsa_e_reqlen;
memcpy (tp, rsa_p, rsa_p_len);
tp += rsa_p_len;
memcpy (tp, rsa_q, rsa_q_len);
tp += rsa_q_len;
if (app->app_local->keyattr[keyno].rsa.format == RSA_CRT
|| app->app_local->keyattr[keyno].rsa.format == RSA_CRT_N)
{
memcpy (tp, rsa_u, rsa_u_len);
tp += rsa_u_len;
memcpy (tp, rsa_dp, rsa_dp_len);
tp += rsa_dp_len;
memcpy (tp, rsa_dq, rsa_dq_len);
tp += rsa_dq_len;
}
if (app->app_local->keyattr[keyno].rsa.format == RSA_STD_N
|| app->app_local->keyattr[keyno].rsa.format == RSA_CRT_N)
{
memcpy (tp, rsa_n, rsa_n_len);
tp += rsa_n_len;
}
/* Sanity check. We don't know the exact length because we
allocated 3 bytes for the first length header. */
assert (tp - template <= template_size);
*result = template;
*resultlen = tp - template;
return 0;
}
static gpg_error_t
build_ecc_privkey_template (app_t app, int keyno,
const unsigned char *ecc_d, size_t ecc_d_len,
const unsigned char *ecc_q, size_t ecc_q_len,
unsigned char **result, size_t *resultlen)
{
unsigned char privkey[2+2];
size_t privkey_len;
unsigned char exthdr[2+2+1];
size_t exthdr_len;
unsigned char suffix[2+1];
size_t suffix_len;
unsigned char *tp;
size_t datalen;
unsigned char *template;
size_t template_size;
int pubkey_required;
pubkey_required = !!(app->app_local->keyattr[keyno].ecc.flags
& ECC_FLAG_PUBKEY);
*result = NULL;
*resultlen = 0;
/* Build the 7f48 cardholder private key template. */
datalen = 0;
tp = privkey;
tp += add_tlv (tp, 0x92, ecc_d_len);
datalen += ecc_d_len;
if (pubkey_required)
{
tp += add_tlv (tp, 0x99, ecc_q_len);
datalen += ecc_q_len;
}
privkey_len = tp - privkey;
/* Build the extended header list without the private key template. */
tp = exthdr;
*tp++ = keyno ==0 ? 0xb6 : keyno == 1? 0xb8 : 0xa4;
*tp++ = 0;
tp += add_tlv (tp, 0x7f48, privkey_len);
exthdr_len = tp - exthdr;
/* Build the 5f48 suffix of the data. */
tp = suffix;
tp += add_tlv (tp, 0x5f48, datalen);
suffix_len = tp - suffix;
/* Now concatenate everything. */
template_size = (1 + 1 /* 0x4d and len. */
+ exthdr_len
+ privkey_len
+ suffix_len
+ datalen);
if (exthdr_len + privkey_len + suffix_len + datalen >= 128)
template_size++;
tp = template = xtrymalloc_secure (template_size);
if (!template)
return gpg_error_from_syserror ();
tp += add_tlv (tp, 0x4d, exthdr_len + privkey_len + suffix_len + datalen);
memcpy (tp, exthdr, exthdr_len);
tp += exthdr_len;
memcpy (tp, privkey, privkey_len);
tp += privkey_len;
memcpy (tp, suffix, suffix_len);
tp += suffix_len;
memcpy (tp, ecc_d, ecc_d_len);
tp += ecc_d_len;
if (pubkey_required)
{
memcpy (tp, ecc_q, ecc_q_len);
tp += ecc_q_len;
}
assert (tp - template == template_size);
*result = template;
*resultlen = tp - template;
return 0;
}
/* Helper for do_writekley to change the size of a key. Not ethat
this deletes the entire key without asking. */
static gpg_error_t
change_keyattr (app_t app, int keyno, const unsigned char *buf, size_t buflen,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
gpg_error_t err;
assert (keyno >=0 && keyno <= 2);
/* Prepare for storing the key. */
err = verify_chv3 (app, pincb, pincb_arg);
if (err)
return err;
/* Change the attribute. */
err = iso7816_put_data (app->slot, 0, 0xC1+keyno, buf, buflen);
if (err)
log_error ("error changing key attribute (key=%d)\n", keyno+1);
else
log_info ("key attribute changed (key=%d)\n", keyno+1);
flush_cache (app);
parse_algorithm_attribute (app, keyno);
app->did_chv1 = 0;
app->did_chv2 = 0;
app->did_chv3 = 0;
return err;
}
static gpg_error_t
change_rsa_keyattr (app_t app, int keyno, unsigned int nbits,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
gpg_error_t err = 0;
unsigned char *buf;
size_t buflen;
void *relptr;
/* Read the current attributes into a buffer. */
relptr = get_one_do (app, 0xC1+keyno, &buf, &buflen, NULL);
if (!relptr)
err = gpg_error (GPG_ERR_CARD);
else if (buflen < 6)
{
/* Attributes too short. */
xfree (relptr);
err = gpg_error (GPG_ERR_CARD);
}
else
{
/* If key attribute was RSA, we only change n_bits and don't
touch anything else. Before we do so, we round up NBITS to a
sensible way in the same way as gpg's key generation does it.
This may help to sort out problems with a few bits too short
keys. */
nbits = ((nbits + 31) / 32) * 32;
buf[1] = (nbits >> 8);
buf[2] = nbits;
/* If it was not RSA, we need to fill other parts. */
if (buf[0] != PUBKEY_ALGO_RSA)
{
buf[0] = PUBKEY_ALGO_RSA;
buf[3] = 0;
buf[4] = 32;
buf[5] = 0;
buflen = 6;
}
err = change_keyattr (app, keyno, buf, buflen, pincb, pincb_arg);
xfree (relptr);
}
return err;
}
/* Helper to process an setattr command for name KEY-ATTR.
In (VALUE,VALUELEN), it expects following string:
RSA: "--force <key> <algo> rsa<nbits>"
ECC: "--force <key> <algo> <curvename>"
*/
static gpg_error_t
change_keyattr_from_string (app_t app,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *value, size_t valuelen)
{
gpg_error_t err = 0;
char *string;
int key, keyno, algo;
int n = 0;
/* VALUE is expected to be a string but not guaranteed to be
terminated. Thus copy it to an allocated buffer first. */
string = xtrymalloc (valuelen+1);
if (!string)
return gpg_error_from_syserror ();
memcpy (string, value, valuelen);
string[valuelen] = 0;
/* Because this function deletes the key we require the string
"--force" in the data to make clear that something serious might
happen. */
sscanf (string, "--force %d %d %n", &key, &algo, &n);
if (n < 12)
{
err = gpg_error (GPG_ERR_INV_DATA);
goto leave;
}
keyno = key - 1;
if (keyno < 0 || keyno > 2)
err = gpg_error (GPG_ERR_INV_ID);
else if (algo == PUBKEY_ALGO_RSA)
{
unsigned int nbits;
errno = 0;
nbits = strtoul (string+n+3, NULL, 10);
if (errno)
err = gpg_error (GPG_ERR_INV_DATA);
else if (nbits < 1024)
err = gpg_error (GPG_ERR_TOO_SHORT);
else if (nbits > 4096)
err = gpg_error (GPG_ERR_TOO_LARGE);
else
err = change_rsa_keyattr (app, keyno, nbits, pincb, pincb_arg);
}
else if (algo == PUBKEY_ALGO_ECDH || algo == PUBKEY_ALGO_ECDSA
|| algo == PUBKEY_ALGO_EDDSA)
{
const char *oidstr;
gcry_mpi_t oid;
const unsigned char *oidbuf;
size_t oid_len;
oidstr = openpgp_curve_to_oid (string+n, NULL);
if (!oidstr)
{
err = gpg_error (GPG_ERR_INV_DATA);
goto leave;
}
err = openpgp_oid_from_str (oidstr, &oid);
if (err)
goto leave;
oidbuf = gcry_mpi_get_opaque (oid, &n);
oid_len = (n+7)/8;
/* We have enough room at STRING. */
string[0] = algo;
memcpy (string+1, oidbuf+1, oid_len-1);
err = change_keyattr (app, keyno, string, oid_len, pincb, pincb_arg);
gcry_mpi_release (oid);
}
else
err = gpg_error (GPG_ERR_PUBKEY_ALGO);
leave:
xfree (string);
return err;
}
static gpg_error_t
rsa_writekey (app_t app, gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg, int keyno,
const unsigned char *buf, size_t buflen, int depth)
{
gpg_error_t err;
const unsigned char *tok;
size_t toklen;
int last_depth1, last_depth2;
const unsigned char *rsa_n = NULL;
const unsigned char *rsa_e = NULL;
const unsigned char *rsa_p = NULL;
const unsigned char *rsa_q = NULL;
size_t rsa_n_len, rsa_e_len, rsa_p_len, rsa_q_len;
unsigned int nbits;
unsigned int maxbits;
unsigned char *template = NULL;
unsigned char *tp;
size_t template_len;
unsigned char fprbuf[20];
u32 created_at = 0;
if (app->app_local->keyattr[keyno].key_type != KEY_TYPE_RSA)
{
log_error (_("unsupported algorithm: %s"), "RSA");
err = gpg_error (GPG_ERR_INV_VALUE);
goto leave;
}
last_depth1 = depth;
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
&& depth && depth >= last_depth1)
{
if (tok)
{
err = gpg_error (GPG_ERR_UNKNOWN_SEXP);
goto leave;
}
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
if (tok && toklen == 1)
{
const unsigned char **mpi;
size_t *mpi_len;
switch (*tok)
{
case 'n': mpi = &rsa_n; mpi_len = &rsa_n_len; break;
case 'e': mpi = &rsa_e; mpi_len = &rsa_e_len; break;
case 'p': mpi = &rsa_p; mpi_len = &rsa_p_len; break;
case 'q': mpi = &rsa_q; mpi_len = &rsa_q_len;break;
default: mpi = NULL; mpi_len = NULL; break;
}
if (mpi && *mpi)
{
err = gpg_error (GPG_ERR_DUP_VALUE);
goto leave;
}
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
if (tok && mpi)
{
/* Strip off leading zero bytes and save. */
for (;toklen && !*tok; toklen--, tok++)
;
*mpi = tok;
*mpi_len = toklen;
}
}
/* Skip until end of list. */
last_depth2 = depth;
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
&& depth && depth >= last_depth2)
;
if (err)
goto leave;
}
/* Parse other attributes. */
last_depth1 = depth;
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
&& depth && depth >= last_depth1)
{
if (tok)
{
err = gpg_error (GPG_ERR_UNKNOWN_SEXP);
goto leave;
}
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
if (tok && toklen == 10 && !memcmp ("created-at", tok, toklen))
{
if ((err = parse_sexp (&buf,&buflen,&depth,&tok,&toklen)))
goto leave;
if (tok)
{
for (created_at=0; toklen && *tok && *tok >= '0' && *tok <= '9';
tok++, toklen--)
created_at = created_at*10 + (*tok - '0');
}
}
/* Skip until end of list. */
last_depth2 = depth;
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
&& depth && depth >= last_depth2)
;
if (err)
goto leave;
}
/* Check that we have all parameters and that they match the card
description. */
if (!created_at)
{
log_error (_("creation timestamp missing\n"));
err = gpg_error (GPG_ERR_INV_VALUE);
goto leave;
}
maxbits = app->app_local->keyattr[keyno].rsa.n_bits;
nbits = rsa_n? count_bits (rsa_n, rsa_n_len) : 0;
if (opt.verbose)
log_info ("RSA modulus size is %u bits\n", nbits);
if (nbits && nbits != maxbits
&& app->app_local->extcap.algo_attr_change)
{
/* Try to switch the key to a new length. */
err = change_rsa_keyattr (app, keyno, nbits, pincb, pincb_arg);
if (!err)
maxbits = app->app_local->keyattr[keyno].rsa.n_bits;
}
if (nbits != maxbits)
{
log_error (_("RSA modulus missing or not of size %d bits\n"),
(int)maxbits);
err = gpg_error (GPG_ERR_BAD_SECKEY);
goto leave;
}
maxbits = app->app_local->keyattr[keyno].rsa.e_bits;
if (maxbits > 32 && !app->app_local->extcap.is_v2)
maxbits = 32; /* Our code for v1 does only support 32 bits. */
nbits = rsa_e? count_bits (rsa_e, rsa_e_len) : 0;
if (nbits < 2 || nbits > maxbits)
{
log_error (_("RSA public exponent missing or larger than %d bits\n"),
(int)maxbits);
err = gpg_error (GPG_ERR_BAD_SECKEY);
goto leave;
}
maxbits = app->app_local->keyattr[keyno].rsa.n_bits/2;
nbits = rsa_p? count_bits (rsa_p, rsa_p_len) : 0;
if (nbits != maxbits)
{
log_error (_("RSA prime %s missing or not of size %d bits\n"),
"P", (int)maxbits);
err = gpg_error (GPG_ERR_BAD_SECKEY);
goto leave;
}
nbits = rsa_q? count_bits (rsa_q, rsa_q_len) : 0;
if (nbits != maxbits)
{
log_error (_("RSA prime %s missing or not of size %d bits\n"),
"Q", (int)maxbits);
err = gpg_error (GPG_ERR_BAD_SECKEY);
goto leave;
}
/* We need to remove the cached public key. */
xfree (app->app_local->pk[keyno].key);
app->app_local->pk[keyno].key = NULL;
app->app_local->pk[keyno].keylen = 0;
app->app_local->pk[keyno].read_done = 0;
if (app->app_local->extcap.is_v2)
{
unsigned char *rsa_u, *rsa_dp, *rsa_dq;
size_t rsa_u_len, rsa_dp_len, rsa_dq_len;
gcry_mpi_t mpi_e, mpi_p, mpi_q;
gcry_mpi_t mpi_u = gcry_mpi_snew (0);
gcry_mpi_t mpi_dp = gcry_mpi_snew (0);
gcry_mpi_t mpi_dq = gcry_mpi_snew (0);
gcry_mpi_t mpi_tmp = gcry_mpi_snew (0);
int exmode;
/* Calculate the u, dp and dq components needed by RSA_CRT cards */
gcry_mpi_scan (&mpi_e, GCRYMPI_FMT_USG, rsa_e, rsa_e_len, NULL);
gcry_mpi_scan (&mpi_p, GCRYMPI_FMT_USG, rsa_p, rsa_p_len, NULL);
gcry_mpi_scan (&mpi_q, GCRYMPI_FMT_USG, rsa_q, rsa_q_len, NULL);
gcry_mpi_invm (mpi_u, mpi_q, mpi_p);
gcry_mpi_sub_ui (mpi_tmp, mpi_p, 1);
gcry_mpi_invm (mpi_dp, mpi_e, mpi_tmp);
gcry_mpi_sub_ui (mpi_tmp, mpi_q, 1);
gcry_mpi_invm (mpi_dq, mpi_e, mpi_tmp);
gcry_mpi_aprint (GCRYMPI_FMT_USG, &rsa_u, &rsa_u_len, mpi_u);
gcry_mpi_aprint (GCRYMPI_FMT_USG, &rsa_dp, &rsa_dp_len, mpi_dp);
gcry_mpi_aprint (GCRYMPI_FMT_USG, &rsa_dq, &rsa_dq_len, mpi_dq);
gcry_mpi_release (mpi_e);
gcry_mpi_release (mpi_p);
gcry_mpi_release (mpi_q);
gcry_mpi_release (mpi_u);
gcry_mpi_release (mpi_dp);
gcry_mpi_release (mpi_dq);
gcry_mpi_release (mpi_tmp);
/* Build the private key template as described in section 4.3.3.7 of
the OpenPGP card specs version 2.0. */
err = build_privkey_template (app, keyno,
rsa_n, rsa_n_len,
rsa_e, rsa_e_len,
rsa_p, rsa_p_len,
rsa_q, rsa_q_len,
rsa_u, rsa_u_len,
rsa_dp, rsa_dp_len,
rsa_dq, rsa_dq_len,
&template, &template_len);
xfree(rsa_u);
xfree(rsa_dp);
xfree(rsa_dq);
if (err)
goto leave;
/* Prepare for storing the key. */
err = verify_chv3 (app, pincb, pincb_arg);
if (err)
goto leave;
/* Store the key. */
if (app->app_local->cardcap.ext_lc_le && template_len > 254)
exmode = 1; /* Use extended length w/o a limit. */
else if (app->app_local->cardcap.cmd_chaining && template_len > 254)
exmode = -254;
else
exmode = 0;
err = iso7816_put_data_odd (app->slot, exmode, 0x3fff,
template, template_len);
}
else
{
/* Build the private key template as described in section 4.3.3.6 of
the OpenPGP card specs version 1.1:
0xC0 <length> public exponent
0xC1 <length> prime p
0xC2 <length> prime q
*/
assert (rsa_e_len <= 4);
template_len = (1 + 1 + 4
+ 1 + 1 + rsa_p_len
+ 1 + 1 + rsa_q_len);
template = tp = xtrymalloc_secure (template_len);
if (!template)
{
err = gpg_error_from_syserror ();
goto leave;
}
*tp++ = 0xC0;
*tp++ = 4;
memcpy (tp, rsa_e, rsa_e_len);
if (rsa_e_len < 4)
{
/* Right justify E. */
memmove (tp+4-rsa_e_len, tp, rsa_e_len);
memset (tp, 0, 4-rsa_e_len);
}
tp += 4;
*tp++ = 0xC1;
*tp++ = rsa_p_len;
memcpy (tp, rsa_p, rsa_p_len);
tp += rsa_p_len;
*tp++ = 0xC2;
*tp++ = rsa_q_len;
memcpy (tp, rsa_q, rsa_q_len);
tp += rsa_q_len;
assert (tp - template == template_len);
/* Prepare for storing the key. */
err = verify_chv3 (app, pincb, pincb_arg);
if (err)
goto leave;
/* Store the key. */
err = iso7816_put_data (app->slot, 0,
(app->card_version > 0x0007? 0xE0:0xE9)+keyno,
template, template_len);
}
if (err)
{
log_error (_("failed to store the key: %s\n"), gpg_strerror (err));
goto leave;
}
err = store_fpr (app, keyno, created_at, fprbuf, PUBKEY_ALGO_RSA,
rsa_n, rsa_n_len, rsa_e, rsa_e_len);
if (err)
goto leave;
leave:
xfree (template);
return err;
}
static gpg_error_t
ecc_writekey (app_t app, gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg, int keyno,
const unsigned char *buf, size_t buflen, int depth)
{
gpg_error_t err;
const unsigned char *tok;
size_t toklen;
int last_depth1, last_depth2;
const unsigned char *ecc_q = NULL;
const unsigned char *ecc_d = NULL;
size_t ecc_q_len, ecc_d_len;
const char *curve = NULL;
u32 created_at = 0;
const char *oidstr;
int flag_djb_tweak = 0;
int algo;
gcry_mpi_t oid = NULL;
const unsigned char *oidbuf;
unsigned int n;
size_t oid_len;
unsigned char fprbuf[20];
/* (private-key(ecc(curve%s)(q%m)(d%m))(created-at%d)):
curve = "NIST P-256" */
/* (private-key(ecc(curve%s)(q%m)(d%m))(created-at%d)):
curve = "secp256k1" */
/* (private-key(ecc(curve%s)(flags eddsa)(q%m)(d%m))(created-at%d)):
curve = "Ed25519" */
last_depth1 = depth;
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
&& depth && depth >= last_depth1)
{
if (tok)
{
err = gpg_error (GPG_ERR_UNKNOWN_SEXP);
goto leave;
}
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
if (tok && toklen == 5 && !memcmp (tok, "curve", 5))
{
char *curve_name;
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
curve_name = xtrymalloc (toklen+1);
if (!curve_name)
{
err = gpg_error_from_syserror ();
goto leave;
}
memcpy (curve_name, tok, toklen);
curve_name[toklen] = 0;
curve = openpgp_is_curve_supported (curve_name, NULL, NULL);
xfree (curve_name);
}
else if (tok && toklen == 5 && !memcmp (tok, "flags", 5))
{
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
if (tok)
{
if ((toklen == 5 && !memcmp (tok, "eddsa", 5))
|| (toklen == 9 && !memcmp (tok, "djb-tweak", 9)))
flag_djb_tweak = 1;
}
}
else if (tok && toklen == 1)
{
const unsigned char **buf2;
size_t *buf2len;
int native = flag_djb_tweak;
switch (*tok)
{
case 'q': buf2 = &ecc_q; buf2len = &ecc_q_len; break;
case 'd': buf2 = &ecc_d; buf2len = &ecc_d_len; native = 0; break;
default: buf2 = NULL; buf2len = NULL; break;
}
if (buf2 && *buf2)
{
err = gpg_error (GPG_ERR_DUP_VALUE);
goto leave;
}
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
if (tok && buf2)
{
if (!native)
/* Strip off leading zero bytes and save. */
for (;toklen && !*tok; toklen--, tok++)
;
*buf2 = tok;
*buf2len = toklen;
}
}
/* Skip until end of list. */
last_depth2 = depth;
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
&& depth && depth >= last_depth2)
;
if (err)
goto leave;
}
/* Parse other attributes. */
last_depth1 = depth;
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
&& depth && depth >= last_depth1)
{
if (tok)
{
err = gpg_error (GPG_ERR_UNKNOWN_SEXP);
goto leave;
}
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
if (tok && toklen == 10 && !memcmp ("created-at", tok, toklen))
{
if ((err = parse_sexp (&buf,&buflen,&depth,&tok,&toklen)))
goto leave;
if (tok)
{
for (created_at=0; toklen && *tok && *tok >= '0' && *tok <= '9';
tok++, toklen--)
created_at = created_at*10 + (*tok - '0');
}
}
/* Skip until end of list. */
last_depth2 = depth;
while (!(err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen))
&& depth && depth >= last_depth2)
;
if (err)
goto leave;
}
/* Check that we have all parameters and that they match the card
description. */
if (!curve)
{
log_error (_("unsupported curve\n"));
err = gpg_error (GPG_ERR_INV_VALUE);
goto leave;
}
if (!created_at)
{
log_error (_("creation timestamp missing\n"));
err = gpg_error (GPG_ERR_INV_VALUE);
goto leave;
}
if (flag_djb_tweak && keyno != 1)
algo = PUBKEY_ALGO_EDDSA;
else if (keyno == 1)
algo = PUBKEY_ALGO_ECDH;
else
algo = PUBKEY_ALGO_ECDSA;
oidstr = openpgp_curve_to_oid (curve, NULL);
err = openpgp_oid_from_str (oidstr, &oid);
if (err)
goto leave;
oidbuf = gcry_mpi_get_opaque (oid, &n);
if (!oidbuf)
{
err = gpg_error_from_syserror ();
goto leave;
}
oid_len = (n+7)/8;
if (app->app_local->keyattr[keyno].key_type != KEY_TYPE_ECC
|| app->app_local->keyattr[keyno].ecc.curve != curve
|| (flag_djb_tweak !=
(app->app_local->keyattr[keyno].ecc.flags & ECC_FLAG_DJB_TWEAK)))
{
if (app->app_local->extcap.algo_attr_change)
{
unsigned char *keyattr;
if (!oid_len)
{
err = gpg_error (GPG_ERR_INTERNAL);
goto leave;
}
keyattr = xtrymalloc (oid_len);
if (!keyattr)
{
err = gpg_error_from_syserror ();
goto leave;
}
keyattr[0] = algo;
memcpy (keyattr+1, oidbuf+1, oid_len-1);
err = change_keyattr (app, keyno, keyattr, oid_len, pincb, pincb_arg);
xfree (keyattr);
if (err)
goto leave;
}
else
{
log_error ("key attribute on card doesn't match\n");
err = gpg_error (GPG_ERR_INV_VALUE);
goto leave;
}
}
if (opt.verbose)
log_info ("ECC private key size is %u bytes\n", (unsigned int)ecc_d_len);
/* We need to remove the cached public key. */
xfree (app->app_local->pk[keyno].key);
app->app_local->pk[keyno].key = NULL;
app->app_local->pk[keyno].keylen = 0;
app->app_local->pk[keyno].read_done = 0;
if (app->app_local->extcap.is_v2)
{
/* Build the private key template as described in section 4.3.3.7 of
the OpenPGP card specs version 2.0. */
unsigned char *template;
size_t template_len;
int exmode;
err = build_ecc_privkey_template (app, keyno,
ecc_d, ecc_d_len,
ecc_q, ecc_q_len,
&template, &template_len);
if (err)
goto leave;
/* Prepare for storing the key. */
err = verify_chv3 (app, pincb, pincb_arg);
if (err)
{
xfree (template);
goto leave;
}
/* Store the key. */
if (app->app_local->cardcap.ext_lc_le && template_len > 254)
exmode = 1; /* Use extended length w/o a limit. */
else if (app->app_local->cardcap.cmd_chaining && template_len > 254)
exmode = -254;
else
exmode = 0;
err = iso7816_put_data_odd (app->slot, exmode, 0x3fff,
template, template_len);
xfree (template);
}
else
err = gpg_error (GPG_ERR_NOT_SUPPORTED);
if (err)
{
log_error (_("failed to store the key: %s\n"), gpg_strerror (err));
goto leave;
}
err = store_fpr (app, keyno, created_at, fprbuf, algo, oidbuf, oid_len,
ecc_q, ecc_q_len, ecdh_params (curve), (size_t)4);
leave:
gcry_mpi_release (oid);
return err;
}
/* Handle the WRITEKEY command for OpenPGP. This function expects a
canonical encoded S-expression with the secret key in KEYDATA and
its length (for assertions) in KEYDATALEN. KEYID needs to be the
usual keyid which for OpenPGP is the string "OPENPGP.n" with
n=1,2,3. Bit 0 of FLAGS indicates whether an existing key shall
get overwritten. PINCB and PINCB_ARG are the usual arguments for
the pinentry callback. */
static gpg_error_t
do_writekey (app_t app, ctrl_t ctrl,
const char *keyid, unsigned int flags,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const unsigned char *keydata, size_t keydatalen)
{
gpg_error_t err;
int force = (flags & 1);
int keyno;
const unsigned char *buf, *tok;
size_t buflen, toklen;
int depth;
(void)ctrl;
if (!strcmp (keyid, "OPENPGP.1"))
keyno = 0;
else if (!strcmp (keyid, "OPENPGP.2"))
keyno = 1;
else if (!strcmp (keyid, "OPENPGP.3"))
keyno = 2;
else
return gpg_error (GPG_ERR_INV_ID);
err = does_key_exist (app, keyno, 0, force);
if (err)
return err;
/*
Parse the S-expression
*/
buf = keydata;
buflen = keydatalen;
depth = 0;
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
if (!tok || toklen != 11 || memcmp ("private-key", tok, toklen))
{
if (!tok)
;
else if (toklen == 21 && !memcmp ("protected-private-key", tok, toklen))
log_info ("protected-private-key passed to writekey\n");
else if (toklen == 20 && !memcmp ("shadowed-private-key", tok, toklen))
log_info ("shadowed-private-key passed to writekey\n");
err = gpg_error (GPG_ERR_BAD_SECKEY);
goto leave;
}
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
goto leave;
if (tok && toklen == 3 && memcmp ("rsa", tok, toklen) == 0)
err = rsa_writekey (app, pincb, pincb_arg, keyno, buf, buflen, depth);
else if (tok && toklen == 3 && memcmp ("ecc", tok, toklen) == 0)
err = ecc_writekey (app, pincb, pincb_arg, keyno, buf, buflen, depth);
else
{
err = gpg_error (GPG_ERR_WRONG_PUBKEY_ALGO);
goto leave;
}
leave:
return err;
}
/* Handle the GENKEY command. */
static gpg_error_t
do_genkey (app_t app, ctrl_t ctrl, const char *keynostr, unsigned int flags,
time_t createtime,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
gpg_error_t err;
char numbuf[30];
unsigned char *buffer = NULL;
const unsigned char *keydata;
size_t buflen, keydatalen;
u32 created_at;
int keyno = atoi (keynostr) - 1;
int force = (flags & 1);
time_t start_at;
int exmode = 0;
int le_value = 256; /* Use legacy value. */
if (keyno < 0 || keyno > 2)
return gpg_error (GPG_ERR_INV_ID);
/* We flush the cache to increase the traffic before a key
generation. This _might_ help a card to gather more entropy. */
flush_cache (app);
/* Obviously we need to remove the cached public key. */
xfree (app->app_local->pk[keyno].key);
app->app_local->pk[keyno].key = NULL;
app->app_local->pk[keyno].keylen = 0;
app->app_local->pk[keyno].read_done = 0;
/* Check whether a key already exists. */
err = does_key_exist (app, keyno, 1, force);
if (err)
return err;
if (app->app_local->keyattr[keyno].key_type == KEY_TYPE_RSA)
{
unsigned int keybits = app->app_local->keyattr[keyno].rsa.n_bits;
/* Because we send the key parameter back via status lines we need
to put a limit on the max. allowed keysize. 2048 bit will
already lead to a 527 byte long status line and thus a 4096 bit
key would exceed the Assuan line length limit. */
if (keybits > 4096)
return gpg_error (GPG_ERR_TOO_LARGE);
if (app->app_local->cardcap.ext_lc_le && keybits > RSA_SMALL_SIZE_KEY
&& app->app_local->keyattr[keyno].key_type == KEY_TYPE_RSA)
{
exmode = 1; /* Use extended length w/o a limit. */
le_value = determine_rsa_response (app, keyno);
/* No need to check le_value because it comes from a 16 bit
value and thus can't create an overflow on a 32 bit
system. */
}
}
/* Prepare for key generation by verifying the Admin PIN. */
err = verify_chv3 (app, pincb, pincb_arg);
if (err)
return err;
log_info (_("please wait while key is being generated ...\n"));
start_at = time (NULL);
err = iso7816_generate_keypair (app->slot, exmode,
(keyno == 0? "\xB6" :
keyno == 1? "\xB8" : "\xA4"),
2, le_value, &buffer, &buflen);
if (err)
{
log_error (_("generating key failed\n"));
return gpg_error (GPG_ERR_CARD);
}
{
int nsecs = (int)(time (NULL) - start_at);
log_info (ngettext("key generation completed (%d second)\n",
"key generation completed (%d seconds)\n",
nsecs), nsecs);
}
keydata = find_tlv (buffer, buflen, 0x7F49, &keydatalen);
if (!keydata)
{
err = gpg_error (GPG_ERR_CARD);
log_error (_("response does not contain the public key data\n"));
goto leave;
}
created_at = (u32)(createtime? createtime : gnupg_get_time ());
sprintf (numbuf, "%u", created_at);
send_status_info (ctrl, "KEY-CREATED-AT",
numbuf, (size_t)strlen(numbuf), NULL, 0);
err = read_public_key (app, ctrl, created_at, keyno, buffer, buflen);
leave:
xfree (buffer);
return err;
}
static unsigned long
convert_sig_counter_value (const unsigned char *value, size_t valuelen)
{
unsigned long ul;
if (valuelen == 3 )
ul = (value[0] << 16) | (value[1] << 8) | value[2];
else
{
log_error (_("invalid structure of OpenPGP card (DO 0x93)\n"));
ul = 0;
}
return ul;
}
static unsigned long
get_sig_counter (app_t app)
{
void *relptr;
unsigned char *value;
size_t valuelen;
unsigned long ul;
relptr = get_one_do (app, 0x0093, &value, &valuelen, NULL);
if (!relptr)
return 0;
ul = convert_sig_counter_value (value, valuelen);
xfree (relptr);
return ul;
}
static gpg_error_t
compare_fingerprint (app_t app, int keyno, unsigned char *sha1fpr)
{
const unsigned char *fpr;
unsigned char *buffer;
size_t buflen, n;
int rc, i;
assert (keyno >= 0 && keyno <= 2);
rc = get_cached_data (app, 0x006E, &buffer, &buflen, 0, 0);
if (rc)
{
log_error (_("error reading application data\n"));
return gpg_error (GPG_ERR_GENERAL);
}
fpr = find_tlv (buffer, buflen, 0x00C5, &n);
if (!fpr || n != 60)
{
xfree (buffer);
log_error (_("error reading fingerprint DO\n"));
return gpg_error (GPG_ERR_GENERAL);
}
fpr += keyno*20;
for (i=0; i < 20; i++)
if (sha1fpr[i] != fpr[i])
{
xfree (buffer);
log_info (_("fingerprint on card does not match requested one\n"));
return gpg_error (GPG_ERR_WRONG_SECKEY);
}
xfree (buffer);
return 0;
}
/* If a fingerprint has been specified check it against the one on the
card. This allows for a meaningful error message in case the key
on the card has been replaced but the shadow information known to
gpg has not been updated. If there is no fingerprint we assume
that this is okay. */
static gpg_error_t
check_against_given_fingerprint (app_t app, const char *fpr, int key)
{
unsigned char tmp[20];
const char *s;
int n;
for (s=fpr, n=0; hexdigitp (s); s++, n++)
;
if (n != 40)
return gpg_error (GPG_ERR_INV_ID);
else if (!*s)
; /* okay */
else
return gpg_error (GPG_ERR_INV_ID);
for (s=fpr, n=0; n < 20; s += 2, n++)
tmp[n] = xtoi_2 (s);
return compare_fingerprint (app, key-1, tmp);
}
/* Compute a digital signature on INDATA which is expected to be the
raw message digest. For this application the KEYIDSTR consists of
the serialnumber and the fingerprint delimited by a slash.
Note that this function may return the error code
GPG_ERR_WRONG_CARD to indicate that the card currently present does
not match the one required for the requested action (e.g. the
serial number does not match).
As a special feature a KEYIDSTR of "OPENPGP.3" redirects the
operation to the auth command.
*/
static gpg_error_t
do_sign (app_t app, const char *keyidstr, int hashalgo,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen )
{
static unsigned char rmd160_prefix[15] = /* Object ID is 1.3.36.3.2.1 */
{ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x24, 0x03,
0x02, 0x01, 0x05, 0x00, 0x04, 0x14 };
static unsigned char sha1_prefix[15] = /* (1.3.14.3.2.26) */
{ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03,
0x02, 0x1a, 0x05, 0x00, 0x04, 0x14 };
static unsigned char sha224_prefix[19] = /* (2.16.840.1.101.3.4.2.4) */
{ 0x30, 0x2D, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48,
0x01, 0x65, 0x03, 0x04, 0x02, 0x04, 0x05, 0x00, 0x04,
0x1C };
static unsigned char sha256_prefix[19] = /* (2.16.840.1.101.3.4.2.1) */
{ 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05,
0x00, 0x04, 0x20 };
static unsigned char sha384_prefix[19] = /* (2.16.840.1.101.3.4.2.2) */
{ 0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 0x05,
0x00, 0x04, 0x30 };
static unsigned char sha512_prefix[19] = /* (2.16.840.1.101.3.4.2.3) */
{ 0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05,
0x00, 0x04, 0x40 };
int rc;
unsigned char data[19+64];
size_t datalen;
unsigned char tmp_sn[20]; /* Actually 16 bytes but also for the fpr. */
const char *s;
int n;
const char *fpr = NULL;
unsigned long sigcount;
int use_auth = 0;
int exmode, le_value;
if (!keyidstr || !*keyidstr)
return gpg_error (GPG_ERR_INV_VALUE);
/* Strip off known prefixes. */
#define X(a,b,c,d) \
if (hashalgo == GCRY_MD_ ## a \
&& (d) \
&& indatalen == sizeof b ## _prefix + (c) \
&& !memcmp (indata, b ## _prefix, sizeof b ## _prefix)) \
{ \
indata = (const char*)indata + sizeof b ## _prefix; \
indatalen -= sizeof b ## _prefix; \
}
if (indatalen == 20)
; /* Assume a plain SHA-1 or RMD160 digest has been given. */
else X(SHA1, sha1, 20, 1)
else X(RMD160, rmd160, 20, 1)
else X(SHA224, sha224, 28, app->app_local->extcap.is_v2)
else X(SHA256, sha256, 32, app->app_local->extcap.is_v2)
else X(SHA384, sha384, 48, app->app_local->extcap.is_v2)
else X(SHA512, sha512, 64, app->app_local->extcap.is_v2)
else if ((indatalen == 28 || indatalen == 32
|| indatalen == 48 || indatalen ==64)
&& app->app_local->extcap.is_v2)
; /* Assume a plain SHA-3 digest has been given. */
else
{
log_error (_("card does not support digest algorithm %s\n"),
gcry_md_algo_name (hashalgo));
/* Or the supplied digest length does not match an algorithm. */
return gpg_error (GPG_ERR_INV_VALUE);
}
#undef X
/* Check whether an OpenPGP card of any version has been requested. */
if (!strcmp (keyidstr, "OPENPGP.1"))
;
else if (!strcmp (keyidstr, "OPENPGP.3"))
use_auth = 1;
else if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
return gpg_error (GPG_ERR_INV_ID);
else
{
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
;
if (n != 32)
return gpg_error (GPG_ERR_INV_ID);
else if (!*s)
; /* no fingerprint given: we allow this for now. */
else if (*s == '/')
fpr = s + 1;
else
return gpg_error (GPG_ERR_INV_ID);
for (s=keyidstr, n=0; n < 16; s += 2, n++)
tmp_sn[n] = xtoi_2 (s);
if (app->serialnolen != 16)
return gpg_error (GPG_ERR_INV_CARD);
if (memcmp (app->serialno, tmp_sn, 16))
return gpg_error (GPG_ERR_WRONG_CARD);
}
/* If a fingerprint has been specified check it against the one on
the card. This is allows for a meaningful error message in case
the key on the card has been replaced but the shadow information
known to gpg was not updated. If there is no fingerprint, gpg
will detect a bogus signature anyway due to the
verify-after-signing feature. */
rc = fpr? check_against_given_fingerprint (app, fpr, 1) : 0;
if (rc)
return rc;
/* Concatenate prefix and digest. */
#define X(a,b,d) \
if (hashalgo == GCRY_MD_ ## a && (d) ) \
{ \
datalen = sizeof b ## _prefix + indatalen; \
assert (datalen <= sizeof data); \
memcpy (data, b ## _prefix, sizeof b ## _prefix); \
memcpy (data + sizeof b ## _prefix, indata, indatalen); \
}
if (use_auth
|| app->app_local->keyattr[use_auth? 2: 0].key_type == KEY_TYPE_RSA)
{
X(SHA1, sha1, 1)
else X(RMD160, rmd160, 1)
else X(SHA224, sha224, app->app_local->extcap.is_v2)
else X(SHA256, sha256, app->app_local->extcap.is_v2)
else X(SHA384, sha384, app->app_local->extcap.is_v2)
else X(SHA512, sha512, app->app_local->extcap.is_v2)
else
return gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM);
}
else
{
datalen = indatalen;
memcpy (data, indata, indatalen);
}
#undef X
/* Redirect to the AUTH command if asked to. */
if (use_auth)
{
return do_auth (app, "OPENPGP.3", pincb, pincb_arg,
data, datalen,
outdata, outdatalen);
}
/* Show the number of signature done using this key. */
sigcount = get_sig_counter (app);
log_info (_("signatures created so far: %lu\n"), sigcount);
/* Check CHV if needed. */
if (!app->did_chv1 || app->force_chv1)
{
char *pinvalue;
int pinlen;
rc = verify_a_chv (app, pincb, pincb_arg, 1, sigcount, &pinvalue, &pinlen);
if (rc)
return rc;
app->did_chv1 = 1;
/* For cards with versions < 2 we want to keep CHV1 and CHV2 in
sync, thus we verify CHV2 here using the given PIN. Cards
with version2 to not have the need for a separate CHV2 and
internally use just one. Obviously we can't do that if the
pinpad has been used. */
if (!app->did_chv2 && pinvalue && !app->app_local->extcap.is_v2)
{
rc = iso7816_verify (app->slot, 0x82, pinvalue, pinlen);
if (gpg_err_code (rc) == GPG_ERR_BAD_PIN)
rc = gpg_error (GPG_ERR_PIN_NOT_SYNCED);
if (rc)
{
log_error (_("verify CHV%d failed: %s\n"), 2, gpg_strerror (rc));
xfree (pinvalue);
flush_cache_after_error (app);
return rc;
}
app->did_chv2 = 1;
}
xfree (pinvalue);
}
if (app->app_local->cardcap.ext_lc_le
&& app->app_local->keyattr[0].key_type == KEY_TYPE_RSA
&& app->app_local->keyattr[0].rsa.n_bits > RSA_SMALL_SIZE_OP)
{
exmode = 1; /* Use extended length. */
le_value = app->app_local->keyattr[0].rsa.n_bits / 8;
}
else
{
exmode = 0;
le_value = 0;
}
rc = iso7816_compute_ds (app->slot, exmode, data, datalen, le_value,
outdata, outdatalen);
if (!rc && app->force_chv1)
app->did_chv1 = 0;
return rc;
}
/* Compute a digital signature using the INTERNAL AUTHENTICATE command
on INDATA which is expected to be the raw message digest. For this
application the KEYIDSTR consists of the serialnumber and the
fingerprint delimited by a slash. Optionally the id OPENPGP.3 may
be given.
Note that this function may return the error code
GPG_ERR_WRONG_CARD to indicate that the card currently present does
not match the one required for the requested action (e.g. the
serial number does not match). */
static gpg_error_t
do_auth (app_t app, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen )
{
int rc;
unsigned char tmp_sn[20]; /* Actually 16 but we use it also for the fpr. */
const char *s;
int n;
const char *fpr = NULL;
if (!keyidstr || !*keyidstr)
return gpg_error (GPG_ERR_INV_VALUE);
if (app->app_local->keyattr[2].key_type == KEY_TYPE_RSA
&& indatalen > 101) /* For a 2048 bit key. */
return gpg_error (GPG_ERR_INV_VALUE);
if (app->app_local->keyattr[2].key_type == KEY_TYPE_ECC)
{
if (!(app->app_local->keyattr[2].ecc.flags & ECC_FLAG_DJB_TWEAK)
&& (indatalen == 51 || indatalen == 67 || indatalen == 83))
{
const char *p = (const char *)indata + 19;
indata = p;
indatalen -= 19;
}
else
{
const char *p = (const char *)indata + 15;
indata = p;
indatalen -= 15;
}
}
/* Check whether an OpenPGP card of any version has been requested. */
if (!strcmp (keyidstr, "OPENPGP.3"))
;
else if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
return gpg_error (GPG_ERR_INV_ID);
else
{
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
;
if (n != 32)
return gpg_error (GPG_ERR_INV_ID);
else if (!*s)
; /* no fingerprint given: we allow this for now. */
else if (*s == '/')
fpr = s + 1;
else
return gpg_error (GPG_ERR_INV_ID);
for (s=keyidstr, n=0; n < 16; s += 2, n++)
tmp_sn[n] = xtoi_2 (s);
if (app->serialnolen != 16)
return gpg_error (GPG_ERR_INV_CARD);
if (memcmp (app->serialno, tmp_sn, 16))
return gpg_error (GPG_ERR_WRONG_CARD);
}
/* If a fingerprint has been specified check it against the one on
the card. This is allows for a meaningful error message in case
the key on the card has been replaced but the shadow information
known to gpg was not updated. If there is no fingerprint, gpg
will detect a bogus signature anyway due to the
verify-after-signing feature. */
rc = fpr? check_against_given_fingerprint (app, fpr, 3) : 0;
if (rc)
return rc;
rc = verify_chv2 (app, pincb, pincb_arg);
if (!rc)
{
int exmode, le_value;
if (app->app_local->cardcap.ext_lc_le
&& app->app_local->keyattr[2].key_type == KEY_TYPE_RSA
&& app->app_local->keyattr[2].rsa.n_bits > RSA_SMALL_SIZE_OP)
{
exmode = 1; /* Use extended length. */
le_value = app->app_local->keyattr[2].rsa.n_bits / 8;
}
else
{
exmode = 0;
le_value = 0;
}
rc = iso7816_internal_authenticate (app->slot, exmode,
indata, indatalen, le_value,
outdata, outdatalen);
}
return rc;
}
static gpg_error_t
do_decipher (app_t app, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen,
unsigned int *r_info)
{
int rc;
unsigned char tmp_sn[20]; /* actually 16 but we use it also for the fpr. */
const char *s;
int n;
const char *fpr = NULL;
int exmode, le_value;
unsigned char *fixbuf = NULL;
int padind = 0;
int fixuplen = 0;
if (!keyidstr || !*keyidstr || !indatalen)
return gpg_error (GPG_ERR_INV_VALUE);
/* Check whether an OpenPGP card of any version has been requested. */
if (!strcmp (keyidstr, "OPENPGP.2"))
;
else if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
return gpg_error (GPG_ERR_INV_ID);
else
{
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
;
if (n != 32)
return gpg_error (GPG_ERR_INV_ID);
else if (!*s)
; /* no fingerprint given: we allow this for now. */
else if (*s == '/')
fpr = s + 1;
else
return gpg_error (GPG_ERR_INV_ID);
for (s=keyidstr, n=0; n < 16; s += 2, n++)
tmp_sn[n] = xtoi_2 (s);
if (app->serialnolen != 16)
return gpg_error (GPG_ERR_INV_CARD);
if (memcmp (app->serialno, tmp_sn, 16))
return gpg_error (GPG_ERR_WRONG_CARD);
}
/* If a fingerprint has been specified check it against the one on
the card. This is allows for a meaningful error message in case
the key on the card has been replaced but the shadow information
known to gpg was not updated. If there is no fingerprint, the
decryption won't produce the right plaintext anyway. */
rc = fpr? check_against_given_fingerprint (app, fpr, 2) : 0;
if (rc)
return rc;
rc = verify_chv2 (app, pincb, pincb_arg);
if (rc)
return rc;
if ((indatalen == 16 + 1 || indatalen == 32 + 1)
&& ((char *)indata)[0] == 0x02)
{
/* PSO:DECIPHER with symmetric key. */
padind = -1;
}
else if (app->app_local->keyattr[1].key_type == KEY_TYPE_RSA)
{
/* We might encounter a couple of leading zeroes in the
cryptogram. Due to internal use of MPIs these leading zeroes
are stripped. However the OpenPGP card expects exactly 128
bytes for the cryptogram (for a 1k key). Thus we need to fix
it up. We do this for up to 16 leading zero bytes; a
cryptogram with more than this is with a very high
probability anyway broken. If a signed conversion was used
we may also encounter one leading zero followed by the correct
length. We fix that as well. */
if (indatalen >= (128-16) && indatalen < 128) /* 1024 bit key. */
fixuplen = 128 - indatalen;
else if (indatalen >= (192-16) && indatalen < 192) /* 1536 bit key. */
fixuplen = 192 - indatalen;
else if (indatalen >= (256-16) && indatalen < 256) /* 2048 bit key. */
fixuplen = 256 - indatalen;
else if (indatalen >= (384-16) && indatalen < 384) /* 3072 bit key. */
fixuplen = 384 - indatalen;
else if (indatalen >= (512-16) && indatalen < 512) /* 4096 bit key. */
fixuplen = 512 - indatalen;
else if (!*(const char *)indata && (indatalen == 129
|| indatalen == 193
|| indatalen == 257
|| indatalen == 385
|| indatalen == 513))
fixuplen = -1;
else
fixuplen = 0;
if (fixuplen > 0)
{
/* While we have to prepend stuff anyway, we can also
include the padding byte here so that iso1816_decipher
does not need to do another data mangling. */
fixuplen++;
fixbuf = xtrymalloc (fixuplen + indatalen);
if (!fixbuf)
return gpg_error_from_syserror ();
memset (fixbuf, 0, fixuplen);
memcpy (fixbuf+fixuplen, indata, indatalen);
indata = fixbuf;
indatalen = fixuplen + indatalen;
padind = -1; /* Already padded. */
}
else if (fixuplen < 0)
{
/* We use the extra leading zero as the padding byte. */
padind = -1;
}
}
else if (app->app_local->keyattr[1].key_type == KEY_TYPE_ECC)
{
int old_format_len = 0;
if ((app->app_local->keyattr[1].ecc.flags & ECC_FLAG_DJB_TWEAK))
{
if (indatalen > 32 && (indatalen % 2))
{ /*
* Skip the prefix. It may be 0x40 (in new format), or MPI
* head of 0x00 (in old format).
*/
indata = (const char *)indata + 1;
indatalen--;
}
else if (indatalen < 32)
{ /*
* Old format trancated by MPI handling.
*/
old_format_len = indatalen;
indatalen = 32;
}
}
n = 0;
if (indatalen < 128)
fixuplen = 7;
else
fixuplen = 10;
fixbuf = xtrymalloc (fixuplen + indatalen);
if (!fixbuf)
return gpg_error_from_syserror ();
/* Build 'Cipher DO' */
fixbuf[n++] = '\xa6';
if (indatalen < 128)
fixbuf[n++] = (char)(indatalen+5);
else
{
fixbuf[n++] = 0x81;
fixbuf[n++] = (char)(indatalen+7);
}
fixbuf[n++] = '\x7f';
fixbuf[n++] = '\x49';
if (indatalen < 128)
fixbuf[n++] = (char)(indatalen+2);
else
{
fixbuf[n++] = 0x81;
fixbuf[n++] = (char)(indatalen+3);
}
fixbuf[n++] = '\x86';
if (indatalen < 128)
fixbuf[n++] = (char)indatalen;
else
{
fixbuf[n++] = 0x81;
fixbuf[n++] = (char)indatalen;
}
if (old_format_len)
{
memset (fixbuf+fixuplen, 0, 32 - old_format_len);
memcpy (fixbuf+fixuplen + 32 - old_format_len,
indata, old_format_len);
}
else
{
memcpy (fixbuf+fixuplen, indata, indatalen);
}
indata = fixbuf;
indatalen = fixuplen + indatalen;
padind = -1;
}
else
return gpg_error (GPG_ERR_INV_VALUE);
if (app->app_local->cardcap.ext_lc_le
&& (indatalen > 254
|| (app->app_local->keyattr[1].key_type == KEY_TYPE_RSA
&& app->app_local->keyattr[1].rsa.n_bits > RSA_SMALL_SIZE_OP)))
{
exmode = 1; /* Extended length w/o a limit. */
le_value = app->app_local->keyattr[1].rsa.n_bits / 8;
}
else if (app->app_local->cardcap.cmd_chaining && indatalen > 254)
{
exmode = -254; /* Command chaining with max. 254 bytes. */
le_value = 0;
}
else
exmode = le_value = 0;
rc = iso7816_decipher (app->slot, exmode,
indata, indatalen, le_value, padind,
outdata, outdatalen);
xfree (fixbuf);
if (app->app_local->keyattr[1].key_type == KEY_TYPE_ECC)
{
unsigned char prefix = 0;
if (app->app_local->keyattr[1].ecc.flags & ECC_FLAG_DJB_TWEAK)
prefix = 0x40;
else if ((*outdatalen % 2) == 0) /* No 0x04 -> x-coordinate only */
prefix = 0x41;
if (prefix)
{ /* Add the prefix */
fixbuf = xtrymalloc (*outdatalen + 1);
if (!fixbuf)
{
xfree (*outdata);
return gpg_error_from_syserror ();
}
fixbuf[0] = prefix;
memcpy (fixbuf+1, *outdata, *outdatalen);
xfree (*outdata);
*outdata = fixbuf;
*outdatalen = *outdatalen + 1;
}
}
if (gpg_err_code (rc) == GPG_ERR_CARD /* actual SW is 0x640a */
&& app->app_local->manufacturer == 5
&& app->card_version == 0x0200)
log_info ("NOTE: Cards with manufacturer id 5 and s/n <= 346 (0x15a)"
" do not work with encryption keys > 2048 bits\n");
*r_info |= APP_DECIPHER_INFO_NOPAD;
return rc;
}
/* Perform a simple verify operation for CHV1 and CHV2, so that
further operations won't ask for CHV2 and it is possible to do a
cheap check on the PIN: If there is something wrong with the PIN
entry system, only the regular CHV will get blocked and not the
dangerous CHV3. KEYIDSTR is the usual card's serial number; an
optional fingerprint part will be ignored.
There is a special mode if the keyidstr is "<serialno>[CHV3]" with
the "[CHV3]" being a literal string: The Admin Pin is checked if
and only if the retry counter is still at 3. */
static gpg_error_t
do_check_pin (app_t app, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
unsigned char tmp_sn[20];
const char *s;
int n;
int admin_pin = 0;
if (!keyidstr || !*keyidstr)
return gpg_error (GPG_ERR_INV_VALUE);
/* Check whether an OpenPGP card of any version has been requested. */
if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
return gpg_error (GPG_ERR_INV_ID);
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
;
if (n != 32)
return gpg_error (GPG_ERR_INV_ID);
else if (!*s)
; /* No fingerprint given: we allow this for now. */
else if (*s == '/')
; /* We ignore a fingerprint. */
else if (!strcmp (s, "[CHV3]") )
admin_pin = 1;
else
return gpg_error (GPG_ERR_INV_ID);
for (s=keyidstr, n=0; n < 16; s += 2, n++)
tmp_sn[n] = xtoi_2 (s);
if (app->serialnolen != 16)
return gpg_error (GPG_ERR_INV_CARD);
if (memcmp (app->serialno, tmp_sn, 16))
return gpg_error (GPG_ERR_WRONG_CARD);
/* Yes, there is a race conditions: The user might pull the card
right here and we won't notice that. However this is not a
problem and the check above is merely for a graceful failure
between operations. */
if (admin_pin)
{
void *relptr;
unsigned char *value;
size_t valuelen;
int count;
relptr = get_one_do (app, 0x00C4, &value, &valuelen, NULL);
if (!relptr || valuelen < 7)
{
log_error (_("error retrieving CHV status from card\n"));
xfree (relptr);
return gpg_error (GPG_ERR_CARD);
}
count = value[6];
xfree (relptr);
if (!count)
{
log_info (_("card is permanently locked!\n"));
return gpg_error (GPG_ERR_BAD_PIN);
}
else if (count < 3)
{
log_info (_("verification of Admin PIN is currently prohibited "
"through this command\n"));
return gpg_error (GPG_ERR_GENERAL);
}
app->did_chv3 = 0; /* Force verification. */
return verify_chv3 (app, pincb, pincb_arg);
}
else
return verify_chv2 (app, pincb, pincb_arg);
}
/* Show information about card capabilities. */
static void
show_caps (struct app_local_s *s)
{
log_info ("Version-2+ .....: %s\n", s->extcap.is_v2? "yes":"no");
log_info ("Extcap-v3 ......: %s\n", s->extcap.extcap_v3? "yes":"no");
log_info ("Button .........: %s\n", s->extcap.has_button? "yes":"no");
log_info ("SM-Support .....: %s", s->extcap.sm_supported? "yes":"no");
if (s->extcap.sm_supported)
log_printf (" (%s)", s->extcap.sm_algo==2? "3DES":
(s->extcap.sm_algo==2? "AES-128" : "AES-256"));
log_info ("Get-Challenge ..: %s", s->extcap.get_challenge? "yes":"no");
if (s->extcap.get_challenge)
log_printf (" (%u bytes max)", s->extcap.max_get_challenge);
log_info ("Key-Import .....: %s\n", s->extcap.key_import? "yes":"no");
log_info ("Change-Force-PW1: %s\n", s->extcap.change_force_chv? "yes":"no");
log_info ("Private-DOs ....: %s\n", s->extcap.private_dos? "yes":"no");
log_info ("Algo-Attr-Change: %s\n", s->extcap.algo_attr_change? "yes":"no");
log_info ("Symmetric Crypto: %s\n", s->extcap.has_decrypt? "yes":"no");
log_info ("KDF-Support ....: %s\n", s->extcap.kdf_do? "yes":"no");
log_info ("Max-Cert3-Len ..: %u\n", s->extcap.max_certlen_3);
if (s->extcap.extcap_v3)
{
log_info ("PIN-Block-2 ....: %s\n", s->extcap.pin_blk2? "yes":"no");
log_info ("MSE-Support ....: %s\n", s->extcap.mse? "yes":"no");
log_info ("Max-Special-DOs : %u\n", s->extcap.max_special_do);
}
log_info ("Cmd-Chaining ...: %s\n", s->cardcap.cmd_chaining?"yes":"no");
log_info ("Ext-Lc-Le ......: %s\n", s->cardcap.ext_lc_le?"yes":"no");
log_info ("Status-Indicator: %02X\n", s->status_indicator);
log_info ("GnuPG-No-Sync ..: %s\n", s->flags.no_sync? "yes":"no");
log_info ("GnuPG-Def-PW2 ..: %s\n", s->flags.def_chv2? "yes":"no");
}
/* Parse the historical bytes in BUFFER of BUFLEN and store them in
APPLOC. */
static void
parse_historical (struct app_local_s *apploc,
const unsigned char * buffer, size_t buflen)
{
/* Example buffer: 00 31 C5 73 C0 01 80 00 90 00 */
if (buflen < 4)
{
log_error ("warning: historical bytes are too short\n");
return; /* Too short. */
}
if (*buffer)
{
log_error ("warning: bad category indicator in historical bytes\n");
return;
}
/* Skip category indicator. */
buffer++;
buflen--;
/* Get the status indicator. */
apploc->status_indicator = buffer[buflen-3];
buflen -= 3;
/* Parse the compact TLV. */
while (buflen)
{
unsigned int tag = (*buffer & 0xf0) >> 4;
unsigned int len = (*buffer & 0x0f);
if (len+1 > buflen)
{
log_error ("warning: bad Compact-TLV in historical bytes\n");
return; /* Error. */
}
buffer++;
buflen--;
if (tag == 7 && len == 3)
{
/* Card capabilities. */
apploc->cardcap.cmd_chaining = !!(buffer[2] & 0x80);
apploc->cardcap.ext_lc_le = !!(buffer[2] & 0x40);
}
buffer += len;
buflen -= len;
}
}
/*
* Check if the OID in an DER encoding is available by GnuPG/libgcrypt,
* and return the curve name. Return NULL if not available.
* The constant string is not allocated dynamically, never free it.
*/
static const char *
ecc_curve (unsigned char *buf, size_t buflen)
{
gcry_mpi_t oid;
char *oidstr;
const char *result;
unsigned char *oidbuf;
oidbuf = xtrymalloc (buflen + 1);
if (!oidbuf)
return NULL;
memcpy (oidbuf+1, buf, buflen);
oidbuf[0] = buflen;
oid = gcry_mpi_set_opaque (NULL, oidbuf, (buflen+1) * 8);
if (!oid)
{
xfree (oidbuf);
return NULL;
}
oidstr = openpgp_oid_to_str (oid);
gcry_mpi_release (oid);
if (!oidstr)
return NULL;
result = openpgp_oid_to_curve (oidstr, 1);
xfree (oidstr);
return result;
}
/* Parse and optionally show the algorithm attributes for KEYNO.
KEYNO must be in the range 0..2. */
static void
parse_algorithm_attribute (app_t app, int keyno)
{
unsigned char *buffer;
size_t buflen;
void *relptr;
const char desc[3][5] = {"sign", "encr", "auth"};
assert (keyno >=0 && keyno <= 2);
app->app_local->keyattr[keyno].key_type = KEY_TYPE_RSA;
app->app_local->keyattr[keyno].rsa.n_bits = 0;
relptr = get_one_do (app, 0xC1+keyno, &buffer, &buflen, NULL);
if (!relptr)
{
log_error ("error reading DO 0x%02X\n", 0xc1+keyno);
return;
}
if (buflen < 1)
{
log_error ("error reading DO 0x%02X\n", 0xc1+keyno);
xfree (relptr);
return;
}
if (opt.verbose)
log_info ("Key-Attr-%s ..: ", desc[keyno]);
if (*buffer == PUBKEY_ALGO_RSA && (buflen == 5 || buflen == 6))
{
app->app_local->keyattr[keyno].rsa.n_bits = (buffer[1]<<8 | buffer[2]);
app->app_local->keyattr[keyno].rsa.e_bits = (buffer[3]<<8 | buffer[4]);
app->app_local->keyattr[keyno].rsa.format = 0;
if (buflen < 6)
app->app_local->keyattr[keyno].rsa.format = RSA_STD;
else
app->app_local->keyattr[keyno].rsa.format = (buffer[5] == 0? RSA_STD :
buffer[5] == 1? RSA_STD_N :
buffer[5] == 2? RSA_CRT :
buffer[5] == 3? RSA_CRT_N :
RSA_UNKNOWN_FMT);
if (opt.verbose)
log_printf
("RSA, n=%u, e=%u, fmt=%s\n",
app->app_local->keyattr[keyno].rsa.n_bits,
app->app_local->keyattr[keyno].rsa.e_bits,
app->app_local->keyattr[keyno].rsa.format == RSA_STD? "std" :
app->app_local->keyattr[keyno].rsa.format == RSA_STD_N?"std+n":
app->app_local->keyattr[keyno].rsa.format == RSA_CRT? "crt" :
app->app_local->keyattr[keyno].rsa.format == RSA_CRT_N?"crt+n":"?");
}
else if (*buffer == PUBKEY_ALGO_ECDH || *buffer == PUBKEY_ALGO_ECDSA
|| *buffer == PUBKEY_ALGO_EDDSA)
{
const char *curve;
int oidlen = buflen - 1;
app->app_local->keyattr[keyno].ecc.flags = 0;
if (buffer[buflen-1] == 0x00 || buffer[buflen-1] == 0xff)
{ /* Found "pubkey required"-byte for private key template. */
oidlen--;
if (buffer[buflen-1] == 0xff)
app->app_local->keyattr[keyno].ecc.flags |= ECC_FLAG_PUBKEY;
}
curve = ecc_curve (buffer + 1, oidlen);
if (!curve)
log_printhex (buffer+1, buflen-1, "Curve with OID not supported: ");
else
{
app->app_local->keyattr[keyno].key_type = KEY_TYPE_ECC;
app->app_local->keyattr[keyno].ecc.curve = curve;
if (*buffer == PUBKEY_ALGO_EDDSA
|| (*buffer == PUBKEY_ALGO_ECDH
&& !strcmp (app->app_local->keyattr[keyno].ecc.curve,
"Curve25519")))
app->app_local->keyattr[keyno].ecc.flags |= ECC_FLAG_DJB_TWEAK;
if (opt.verbose)
log_printf
("ECC, curve=%s%s\n", app->app_local->keyattr[keyno].ecc.curve,
!(app->app_local->keyattr[keyno].ecc.flags & ECC_FLAG_DJB_TWEAK)?
"": keyno==1? " (djb-tweak)": " (eddsa)");
}
}
else if (opt.verbose)
log_printhex (buffer, buflen, "");
xfree (relptr);
}
/* Select the OpenPGP application on the card in SLOT. This function
must be used before any other OpenPGP application functions. */
gpg_error_t
app_select_openpgp (app_t app)
{
static char const aid[] = { 0xD2, 0x76, 0x00, 0x01, 0x24, 0x01 };
int slot = app->slot;
int rc;
unsigned char *buffer;
size_t buflen;
void *relptr;
/* Note that the card can't cope with P2=0xCO, thus we need to pass a
special flag value. */
rc = iso7816_select_application (slot, aid, sizeof aid, 0x0001);
if (!rc)
{
unsigned int manufacturer;
app->apptype = "OPENPGP";
app->did_chv1 = 0;
app->did_chv2 = 0;
app->did_chv3 = 0;
app->app_local = NULL;
/* The OpenPGP card returns the serial number as part of the
AID; because we prefer to use OpenPGP serial numbers, we
replace a possibly already set one from a EF.GDO with this
one. Note, that for current OpenPGP cards, no EF.GDO exists
and thus it won't matter at all. */
rc = iso7816_get_data (slot, 0, 0x004F, &buffer, &buflen);
if (rc)
goto leave;
if (opt.verbose)
{
log_info ("AID: ");
log_printhex (buffer, buflen, "");
}
app->card_version = buffer[6] << 8;
app->card_version |= buffer[7];
manufacturer = (buffer[8]<<8 | buffer[9]);
xfree (app->serialno);
app->serialno = buffer;
app->serialnolen = buflen;
buffer = NULL;
app->app_local = xtrycalloc (1, sizeof *app->app_local);
if (!app->app_local)
{
rc = gpg_error (gpg_err_code_from_errno (errno));
goto leave;
}
app->app_local->manufacturer = manufacturer;
if (app->card_version >= 0x0200)
app->app_local->extcap.is_v2 = 1;
if (app->card_version >= 0x0300)
app->app_local->extcap.extcap_v3 = 1;
/* Read the historical bytes. */
relptr = get_one_do (app, 0x5f52, &buffer, &buflen, NULL);
if (relptr)
{
if (opt.verbose)
{
log_info ("Historical Bytes: ");
log_printhex (buffer, buflen, "");
}
parse_historical (app->app_local, buffer, buflen);
xfree (relptr);
}
/* Read the force-chv1 flag. */
relptr = get_one_do (app, 0x00C4, &buffer, &buflen, NULL);
if (!relptr)
{
log_error (_("can't access %s - invalid OpenPGP card?\n"),
"CHV Status Bytes");
goto leave;
}
app->force_chv1 = (buflen && *buffer == 0);
xfree (relptr);
/* Read the extended capabilities. */
relptr = get_one_do (app, 0x00C0, &buffer, &buflen, NULL);
if (!relptr)
{
log_error (_("can't access %s - invalid OpenPGP card?\n"),
"Extended Capability Flags" );
goto leave;
}
if (buflen)
{
app->app_local->extcap.sm_supported = !!(*buffer & 0x80);
app->app_local->extcap.get_challenge = !!(*buffer & 0x40);
app->app_local->extcap.key_import = !!(*buffer & 0x20);
app->app_local->extcap.change_force_chv = !!(*buffer & 0x10);
app->app_local->extcap.private_dos = !!(*buffer & 0x08);
app->app_local->extcap.algo_attr_change = !!(*buffer & 0x04);
app->app_local->extcap.has_decrypt = !!(*buffer & 0x02);
app->app_local->extcap.kdf_do = !!(*buffer & 0x01);
}
if (buflen >= 10)
{
/* Available with cards of v2 or later. */
app->app_local->extcap.sm_algo = buffer[1];
app->app_local->extcap.max_get_challenge
= (buffer[2] << 8 | buffer[3]);
app->app_local->extcap.max_certlen_3 = (buffer[4] << 8 | buffer[5]);
/* Interpretation is different between v2 and v3, unfortunately. */
if (app->app_local->extcap.extcap_v3)
{
app->app_local->extcap.max_special_do
= (buffer[6] << 8 | buffer[7]);
app->app_local->extcap.pin_blk2 = !!(buffer[8] & 0x01);
app->app_local->extcap.mse= !!(buffer[9] & 0x01);
}
}
xfree (relptr);
/* Some of the first cards accidentally don't set the
CHANGE_FORCE_CHV bit but allow it anyway. */
if (app->card_version <= 0x0100 && manufacturer == 1)
app->app_local->extcap.change_force_chv = 1;
/* Check optional DO of "General Feature Management" for button. */
relptr = get_one_do (app, 0x7f74, &buffer, &buflen, NULL);
if (relptr)
/* It must be: 03 81 01 20 */
app->app_local->extcap.has_button = 1;
parse_login_data (app);
if (opt.verbose)
show_caps (app->app_local);
parse_algorithm_attribute (app, 0);
parse_algorithm_attribute (app, 1);
parse_algorithm_attribute (app, 2);
if (opt.verbose > 1)
dump_all_do (slot);
app->fnc.deinit = do_deinit;
app->fnc.learn_status = do_learn_status;
app->fnc.readcert = do_readcert;
app->fnc.readkey = do_readkey;
app->fnc.getattr = do_getattr;
app->fnc.setattr = do_setattr;
app->fnc.writecert = do_writecert;
app->fnc.writekey = do_writekey;
app->fnc.genkey = do_genkey;
app->fnc.sign = do_sign;
app->fnc.auth = do_auth;
app->fnc.decipher = do_decipher;
app->fnc.change_pin = do_change_pin;
app->fnc.check_pin = do_check_pin;
}
leave:
if (rc)
do_deinit (app);
return rc;
}
diff --git a/scd/app.c b/scd/app.c
index 800c954b4..8e0955538 100644
--- a/scd/app.c
+++ b/scd/app.c
@@ -1,1186 +1,1186 @@
/* app.c - Application selection.
* Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <npth.h>
#include "scdaemon.h"
#include "../common/exechelp.h"
#include "app-common.h"
#include "iso7816.h"
#include "apdu.h"
#include "../common/tlv.h"
static npth_mutex_t app_list_lock;
static app_t app_top;
static void
print_progress_line (void *opaque, const char *what, int pc, int cur, int tot)
{
ctrl_t ctrl = opaque;
char line[100];
if (ctrl)
{
snprintf (line, sizeof line, "%s %c %d %d", what, pc, cur, tot);
send_status_direct (ctrl, "PROGRESS", line);
}
}
/* Lock the reader SLOT. This function shall be used right before
calling any of the actual application functions to serialize access
to the reader. We do this always even if the reader is not
actually used. This allows an actual connection to assume that it
never shares a reader (while performing one command). Returns 0 on
success; only then the unlock_reader function must be called after
returning from the handler. */
static gpg_error_t
lock_app (app_t app, ctrl_t ctrl)
{
if (npth_mutex_lock (&app->lock))
{
gpg_error_t err = gpg_error_from_syserror ();
log_error ("failed to acquire APP lock for %p: %s\n",
app, gpg_strerror (err));
return err;
}
apdu_set_progress_cb (app->slot, print_progress_line, ctrl);
apdu_set_prompt_cb (app->slot, popup_prompt, ctrl);
return 0;
}
/* Release a lock on the reader. See lock_reader(). */
static void
unlock_app (app_t app)
{
apdu_set_progress_cb (app->slot, NULL, NULL);
apdu_set_prompt_cb (app->slot, NULL, NULL);
if (npth_mutex_unlock (&app->lock))
{
gpg_error_t err = gpg_error_from_syserror ();
log_error ("failed to release APP lock for %p: %s\n",
app, gpg_strerror (err));
}
}
/* This function may be called to print information pertaining to the
current state of this module to the log. */
void
app_dump_state (void)
{
app_t a;
npth_mutex_lock (&app_list_lock);
for (a = app_top; a; a = a->next)
log_info ("app_dump_state: app=%p type='%s'\n", a, a->apptype);
npth_mutex_unlock (&app_list_lock);
}
/* Check whether the application NAME is allowed. This does not mean
we have support for it though. */
static int
is_app_allowed (const char *name)
{
strlist_t l;
for (l=opt.disabled_applications; l; l = l->next)
if (!strcmp (l->d, name))
return 0; /* no */
return 1; /* yes */
}
static gpg_error_t
check_conflict (app_t app, const char *name)
{
if (!app || !name || (app->apptype && !ascii_strcasecmp (app->apptype, name)))
return 0;
log_info ("application '%s' in use - can't switch\n",
app->apptype? app->apptype : "<null>");
return gpg_error (GPG_ERR_CONFLICT);
}
/* This function is used by the serialno command to check for an
application conflict which may appear if the serialno command is
used to request a specific application and the connection has
already done a select_application. */
gpg_error_t
check_application_conflict (const char *name, app_t app)
{
return check_conflict (app, name);
}
gpg_error_t
app_reset (app_t app, ctrl_t ctrl, int send_reset)
{
gpg_error_t err = 0;
if (send_reset)
{
int sw;
lock_app (app, ctrl);
sw = apdu_reset (app->slot);
if (sw)
err = gpg_error (GPG_ERR_CARD_RESET);
app->reset_requested = 1;
unlock_app (app);
scd_kick_the_loop ();
gnupg_sleep (1);
}
else
{
ctrl->app_ctx = NULL;
release_application (app, 0);
}
return err;
}
static gpg_error_t
app_new_register (int slot, ctrl_t ctrl, const char *name,
int periodical_check_needed)
{
gpg_error_t err = 0;
app_t app = NULL;
unsigned char *result = NULL;
size_t resultlen;
int want_undefined;
/* Need to allocate a new one. */
app = xtrycalloc (1, sizeof *app);
if (!app)
{
err = gpg_error_from_syserror ();
log_info ("error allocating context: %s\n", gpg_strerror (err));
return err;
}
app->slot = slot;
app->card_status = (unsigned int)-1;
if (npth_mutex_init (&app->lock, NULL))
{
err = gpg_error_from_syserror ();
log_error ("error initializing mutex: %s\n", gpg_strerror (err));
xfree (app);
return err;
}
err = lock_app (app, ctrl);
if (err)
{
xfree (app);
return err;
}
want_undefined = (name && !strcmp (name, "undefined"));
/* Try to read the GDO file first to get a default serial number.
We skip this if the undefined application has been requested. */
if (!want_undefined)
{
err = iso7816_select_file (slot, 0x3F00, 1);
if (gpg_err_code (err) == GPG_ERR_CARD)
{
/* Might be SW==0x7D00. Let's test whether it is a Yubikey
* by selecting its manager application and then reading the
* config. */
static char const yk_aid[] =
{ 0xA0, 0x00, 0x00, 0x05, 0x27, 0x47, 0x11, 0x17 }; /*MGR*/
unsigned char *buf;
size_t buflen;
const unsigned char *s0, *s1;
size_t n;
if (!iso7816_select_application (slot, yk_aid, sizeof yk_aid,
0x0001)
&& !iso7816_apdu_direct (slot, "\x00\x1d\x00\x00\x00", 5, 0,
NULL, &buf, &buflen))
{
if (opt.verbose)
{
log_info ("Yubico: config=");
log_printhex (buf, buflen, "");
}
/* We skip the first byte which seems to be the total
* length of the config data. */
if (buflen > 1)
{
s0 = find_tlv (buf+1, buflen-1, 0x04, &n); /* Form factor */
if (s0 && n == 1)
{
s1 = find_tlv (buf+1, buflen-1, 0x02, &n); /* Serial */
if (s1 && n >= 4)
{
app->serialno = xtrymalloc (3 + 1 + n);
if (app->serialno)
{
app->serialnolen = 3 + 1 + n;
app->serialno[0] = 0xff;
app->serialno[1] = 0x02;
app->serialno[2] = 0x0;
app->serialno[3] = *s0;
memcpy (app->serialno + 4, s1, n);
/* Note that we do not clear the error
* so that no further serial number
* testing is done. After all we just
* set the serial number. */
}
}
}
}
xfree (buf);
}
}
if (!err)
err = iso7816_select_file (slot, 0x2F02, 0);
if (!err)
err = iso7816_read_binary (slot, 0, 0, &result, &resultlen);
if (!err)
{
size_t n;
const unsigned char *p;
p = find_tlv_unchecked (result, resultlen, 0x5A, &n);
if (p)
resultlen -= (p-result);
if (p && n > resultlen && n == 0x0d && resultlen+1 == n)
{
/* The object it does not fit into the buffer. This is an
invalid encoding (or the buffer is too short. However, I
have some test cards with such an invalid encoding and
therefore I use this ugly workaround to return something
I can further experiment with. */
log_info ("enabling BMI testcard workaround\n");
n--;
}
if (p && n <= resultlen)
{
/* The GDO file is pretty short, thus we simply reuse it for
storing the serial number. */
memmove (result, p, n);
app->serialno = result;
app->serialnolen = n;
err = app_munge_serialno (app);
if (err)
goto leave;
}
else
xfree (result);
result = NULL;
}
}
/* For certain error codes, there is no need to try more. */
if (gpg_err_code (err) == GPG_ERR_CARD_NOT_PRESENT
|| gpg_err_code (err) == GPG_ERR_ENODEV)
goto leave;
/* Figure out the application to use. */
if (want_undefined)
{
/* We switch to the "undefined" application only if explicitly
requested. */
app->apptype = "UNDEFINED";
err = 0;
}
else
err = gpg_error (GPG_ERR_NOT_FOUND);
if (err && is_app_allowed ("openpgp")
&& (!name || !strcmp (name, "openpgp")))
err = app_select_openpgp (app);
if (err && is_app_allowed ("piv") && (!name || !strcmp (name, "piv")))
err = app_select_piv (app);
if (err && is_app_allowed ("nks") && (!name || !strcmp (name, "nks")))
err = app_select_nks (app);
if (err && is_app_allowed ("p15") && (!name || !strcmp (name, "p15")))
err = app_select_p15 (app);
if (err && is_app_allowed ("geldkarte")
&& (!name || !strcmp (name, "geldkarte")))
err = app_select_geldkarte (app);
if (err && is_app_allowed ("dinsig") && (!name || !strcmp (name, "dinsig")))
err = app_select_dinsig (app);
if (err && is_app_allowed ("sc-hsm") && (!name || !strcmp (name, "sc-hsm")))
err = app_select_sc_hsm (app);
if (err && name && gpg_err_code (err) != GPG_ERR_OBJ_TERM_STATE)
err = gpg_error (GPG_ERR_NOT_SUPPORTED);
leave:
if (err)
{
if (name)
log_info ("can't select application '%s': %s\n",
name, gpg_strerror (err));
else
log_info ("no supported card application found: %s\n",
gpg_strerror (err));
unlock_app (app);
xfree (app);
return err;
}
app->periodical_check_needed = periodical_check_needed;
app->next = app_top;
app_top = app;
unlock_app (app);
return 0;
}
/* If called with NAME as NULL, select the best fitting application
and return a context; otherwise select the application with NAME
and return a context. Returns an error code and stores NULL at
R_APP if no application was found or no card is present. */
gpg_error_t
select_application (ctrl_t ctrl, const char *name, app_t *r_app,
int scan, const unsigned char *serialno_bin,
size_t serialno_bin_len)
{
gpg_error_t err = 0;
app_t a, a_prev = NULL;
*r_app = NULL;
npth_mutex_lock (&app_list_lock);
if (scan || !app_top)
{
struct dev_list *l;
int new_app = 0;
/* Scan the devices to find new device(s). */
err = apdu_dev_list_start (opt.reader_port, &l);
if (err)
{
npth_mutex_unlock (&app_list_lock);
return err;
}
while (1)
{
int slot;
int periodical_check_needed_this;
slot = apdu_open_reader (l, !app_top);
if (slot < 0)
break;
periodical_check_needed_this = apdu_connect (slot);
if (periodical_check_needed_this < 0)
{
/* We close a reader with no card. */
err = gpg_error (GPG_ERR_ENODEV);
}
else
{
err = app_new_register (slot, ctrl, name,
periodical_check_needed_this);
new_app++;
}
if (err)
apdu_close_reader (slot);
}
apdu_dev_list_finish (l);
/* If new device(s), kick the scdaemon loop. */
if (new_app)
scd_kick_the_loop ();
}
for (a = app_top; a; a = a->next)
{
lock_app (a, ctrl);
if (serialno_bin == NULL)
break;
if (a->serialnolen == serialno_bin_len
&& !memcmp (a->serialno, serialno_bin, a->serialnolen))
break;
unlock_app (a);
a_prev = a;
}
if (a)
{
err = check_conflict (a, name);
if (!err)
{
a->ref_count++;
*r_app = a;
if (a_prev)
{
a_prev->next = a->next;
a->next = app_top;
app_top = a;
}
}
unlock_app (a);
}
else
err = gpg_error (GPG_ERR_ENODEV);
npth_mutex_unlock (&app_list_lock);
return err;
}
char *
get_supported_applications (void)
{
const char *list[] = {
"openpgp",
"piv",
"nks",
"p15",
"geldkarte",
"dinsig",
"sc-hsm",
/* Note: "undefined" is not listed here because it needs special
treatment by the client. */
NULL
};
int idx;
size_t nbytes;
char *buffer, *p;
for (nbytes=1, idx=0; list[idx]; idx++)
nbytes += strlen (list[idx]) + 1 + 1;
buffer = xtrymalloc (nbytes);
if (!buffer)
return NULL;
for (p=buffer, idx=0; list[idx]; idx++)
if (is_app_allowed (list[idx]))
p = stpcpy (stpcpy (p, list[idx]), ":\n");
*p = 0;
return buffer;
}
/* Deallocate the application. */
static void
deallocate_app (app_t app)
{
app_t a, a_prev = NULL;
for (a = app_top; a; a = a->next)
if (a == app)
{
if (a_prev == NULL)
app_top = a->next;
else
a_prev->next = a->next;
break;
}
else
a_prev = a;
if (app->ref_count)
log_error ("trying to release context used yet (%d)\n", app->ref_count);
if (app->fnc.deinit)
{
app->fnc.deinit (app);
app->fnc.deinit = NULL;
}
xfree (app->serialno);
unlock_app (app);
xfree (app);
}
/* Free the resources associated with the application APP. APP is
allowed to be NULL in which case this is a no-op. Note that we are
using reference counting to track the users of the application and
actually deferring the deallocation to allow for a later reuse by
a new connection. */
void
release_application (app_t app, int locked_already)
{
if (!app)
return;
/* We don't deallocate app here. Instead, we keep it. This is
useful so that a card does not get reset even if only one session
is using the card - this way the PIN cache and other cached data
are preserved. */
if (!locked_already)
lock_app (app, NULL);
if (!app->ref_count)
log_bug ("trying to release an already released context\n");
--app->ref_count;
if (!locked_already)
unlock_app (app);
}
/* The serial number may need some cosmetics. Do it here. This
function shall only be called once after a new serial number has
been put into APP->serialno.
Prefixes we use:
FF 00 00 = For serial numbers starting with an FF
FF 01 00 = Some german p15 cards return an empty serial number so the
serial number from the EF(TokenInfo) is used instead.
FF 02 00 = Serial number from Yubikey config
FF 7F 00 = No serialno.
All other serial number not starting with FF are used as they are.
*/
gpg_error_t
app_munge_serialno (app_t app)
{
if (app->serialnolen && app->serialno[0] == 0xff)
{
/* The serial number starts with our special prefix. This
requires that we put our default prefix "FF0000" in front. */
unsigned char *p = xtrymalloc (app->serialnolen + 3);
if (!p)
return gpg_error_from_syserror ();
memcpy (p, "\xff\0", 3);
memcpy (p+3, app->serialno, app->serialnolen);
app->serialnolen += 3;
xfree (app->serialno);
app->serialno = p;
}
else if (!app->serialnolen)
{
unsigned char *p = xtrymalloc (3);
if (!p)
return gpg_error_from_syserror ();
memcpy (p, "\xff\x7f", 3);
app->serialnolen = 3;
xfree (app->serialno);
app->serialno = p;
}
return 0;
}
/* Retrieve the serial number of the card. The serial number is
returned as a malloced string (hex encoded) in SERIAL. Caller must
free SERIAL unless the function returns an error. */
char *
app_get_serialno (app_t app)
{
char *serial;
if (!app)
return NULL;
if (!app->serialnolen)
serial = xtrystrdup ("FF7F00");
else
serial = bin2hex (app->serialno, app->serialnolen, NULL);
return serial;
}
/* Write out the application specifig status lines for the LEARN
command. */
gpg_error_t
app_write_learn_status (app_t app, ctrl_t ctrl, unsigned int flags)
{
gpg_error_t err;
if (!app)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->fnc.learn_status)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
/* We do not send APPTYPE if only keypairinfo is requested. */
if (app->apptype && !(flags & 1))
send_status_direct (ctrl, "APPTYPE", app->apptype);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.learn_status (app, ctrl, flags);
unlock_app (app);
return err;
}
/* Read the certificate with id CERTID (as returned by learn_status in
the CERTINFO status lines) and return it in the freshly allocated
buffer put into CERT and the length of the certificate put into
CERTLEN. */
gpg_error_t
app_readcert (app_t app, ctrl_t ctrl, const char *certid,
unsigned char **cert, size_t *certlen)
{
gpg_error_t err;
if (!app)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (!app->fnc.readcert)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.readcert (app, certid, cert, certlen);
unlock_app (app);
return err;
}
/* Read the key with ID KEYID. On success a canonical encoded
S-expression with the public key will get stored at PK and its
length (for assertions) at PKLEN; the caller must release that
buffer. On error NULL will be stored at PK and PKLEN and an error
code returned.
This function might not be supported by all applications. */
gpg_error_t
app_readkey (app_t app, ctrl_t ctrl, int advanced, const char *keyid,
unsigned char **pk, size_t *pklen)
{
gpg_error_t err;
if (pk)
*pk = NULL;
if (pklen)
*pklen = 0;
if (!app || !keyid || !pk || !pklen)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (!app->fnc.readkey)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err= app->fnc.readkey (app, advanced, keyid, pk, pklen);
unlock_app (app);
return err;
}
/* Perform a GETATTR operation. */
gpg_error_t
app_getattr (app_t app, ctrl_t ctrl, const char *name)
{
gpg_error_t err;
if (!app || !name || !*name)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (app->apptype && name && !strcmp (name, "APPTYPE"))
{
send_status_direct (ctrl, "APPTYPE", app->apptype);
return 0;
}
if (name && !strcmp (name, "SERIALNO"))
{
char *serial;
serial = app_get_serialno (app);
if (!serial)
return gpg_error (GPG_ERR_INV_VALUE);
send_status_direct (ctrl, "SERIALNO", serial);
xfree (serial);
return 0;
}
if (!app->fnc.getattr)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.getattr (app, ctrl, name);
unlock_app (app);
return err;
}
/* Perform a SETATTR operation. */
gpg_error_t
app_setattr (app_t app, ctrl_t ctrl, const char *name,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const unsigned char *value, size_t valuelen)
{
gpg_error_t err;
if (!app || !name || !*name || !value)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (!app->fnc.setattr)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.setattr (app, name, pincb, pincb_arg, value, valuelen);
unlock_app (app);
return err;
}
/* Create the signature and return the allocated result in OUTDATA.
If a PIN is required the PINCB will be used to ask for the PIN; it
should return the PIN in an allocated buffer and put it into PIN. */
gpg_error_t
app_sign (app_t app, ctrl_t ctrl, const char *keyidstr, int hashalgo,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen )
{
gpg_error_t err;
if (!app || !indata || !indatalen || !outdata || !outdatalen || !pincb)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (!app->fnc.sign)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.sign (app, keyidstr, hashalgo,
pincb, pincb_arg,
indata, indatalen,
outdata, outdatalen);
unlock_app (app);
if (opt.verbose)
log_info ("operation sign result: %s\n", gpg_strerror (err));
return err;
}
/* Create the signature using the INTERNAL AUTHENTICATE command and
return the allocated result in OUTDATA. If a PIN is required the
PINCB will be used to ask for the PIN; it should return the PIN in
an allocated buffer and put it into PIN. */
gpg_error_t
app_auth (app_t app, ctrl_t ctrl, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen )
{
gpg_error_t err;
if (!app || !indata || !indatalen || !outdata || !outdatalen || !pincb)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (!app->fnc.auth)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.auth (app, keyidstr,
pincb, pincb_arg,
indata, indatalen,
outdata, outdatalen);
unlock_app (app);
if (opt.verbose)
log_info ("operation auth result: %s\n", gpg_strerror (err));
return err;
}
/* Decrypt the data in INDATA and return the allocated result in OUTDATA.
If a PIN is required the PINCB will be used to ask for the PIN; it
should return the PIN in an allocated buffer and put it into PIN. */
gpg_error_t
app_decipher (app_t app, ctrl_t ctrl, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const void *indata, size_t indatalen,
unsigned char **outdata, size_t *outdatalen,
unsigned int *r_info)
{
gpg_error_t err;
*r_info = 0;
if (!app || !indata || !indatalen || !outdata || !outdatalen || !pincb)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (!app->fnc.decipher)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.decipher (app, keyidstr,
pincb, pincb_arg,
indata, indatalen,
outdata, outdatalen,
r_info);
unlock_app (app);
if (opt.verbose)
log_info ("operation decipher result: %s\n", gpg_strerror (err));
return err;
}
/* Perform the WRITECERT operation. */
gpg_error_t
app_writecert (app_t app, ctrl_t ctrl,
const char *certidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const unsigned char *data, size_t datalen)
{
gpg_error_t err;
if (!app || !certidstr || !*certidstr || !pincb)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (!app->fnc.writecert)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.writecert (app, ctrl, certidstr,
pincb, pincb_arg, data, datalen);
unlock_app (app);
if (opt.verbose)
log_info ("operation writecert result: %s\n", gpg_strerror (err));
return err;
}
/* Perform the WRITEKEY operation. */
gpg_error_t
app_writekey (app_t app, ctrl_t ctrl,
const char *keyidstr, unsigned int flags,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
const unsigned char *keydata, size_t keydatalen)
{
gpg_error_t err;
if (!app || !keyidstr || !*keyidstr || !pincb)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (!app->fnc.writekey)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.writekey (app, ctrl, keyidstr, flags,
pincb, pincb_arg, keydata, keydatalen);
unlock_app (app);
if (opt.verbose)
log_info ("operation writekey result: %s\n", gpg_strerror (err));
return err;
}
/* Perform a SETATTR operation. */
gpg_error_t
app_genkey (app_t app, ctrl_t ctrl, const char *keynostr, unsigned int flags,
time_t createtime,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
gpg_error_t err;
if (!app || !keynostr || !*keynostr || !pincb)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (!app->fnc.genkey)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.genkey (app, ctrl, keynostr, flags,
createtime, pincb, pincb_arg);
unlock_app (app);
if (opt.verbose)
log_info ("operation genkey result: %s\n", gpg_strerror (err));
return err;
}
/* Perform a GET CHALLENGE operation. This function is special as it
directly accesses the card without any application specific
wrapper. */
gpg_error_t
app_get_challenge (app_t app, ctrl_t ctrl, size_t nbytes, unsigned char *buffer)
{
gpg_error_t err;
if (!app || !nbytes || !buffer)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
err = lock_app (app, ctrl);
if (err)
return err;
err = iso7816_get_challenge (app->slot, nbytes, buffer);
unlock_app (app);
return err;
}
/* Perform a CHANGE REFERENCE DATA or RESET RETRY COUNTER operation. */
gpg_error_t
app_change_pin (app_t app, ctrl_t ctrl, const char *chvnostr, int reset_mode,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
gpg_error_t err;
if (!app || !chvnostr || !*chvnostr || !pincb)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (!app->fnc.change_pin)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.change_pin (app, ctrl, chvnostr, reset_mode,
pincb, pincb_arg);
unlock_app (app);
if (opt.verbose)
log_info ("operation change_pin result: %s\n", gpg_strerror (err));
return err;
}
-/* Perform a VERIFY operation without doing anything lese. This may
+/* Perform a VERIFY operation without doing anything else. This may
be used to initialize a the PIN cache for long lasting other
operations. Its use is highly application dependent. */
gpg_error_t
app_check_pin (app_t app, ctrl_t ctrl, const char *keyidstr,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
gpg_error_t err;
if (!app || !keyidstr || !*keyidstr || !pincb)
return gpg_error (GPG_ERR_INV_VALUE);
if (!app->ref_count)
return gpg_error (GPG_ERR_CARD_NOT_INITIALIZED);
if (!app->fnc.check_pin)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
err = lock_app (app, ctrl);
if (err)
return err;
err = app->fnc.check_pin (app, keyidstr, pincb, pincb_arg);
unlock_app (app);
if (opt.verbose)
log_info ("operation check_pin result: %s\n", gpg_strerror (err));
return err;
}
static void
report_change (int slot, int old_status, int cur_status)
{
char *homestr, *envstr;
char *fname;
char templ[50];
FILE *fp;
snprintf (templ, sizeof templ, "reader_%d.status", slot);
fname = make_filename (gnupg_homedir (), templ, NULL );
fp = fopen (fname, "w");
if (fp)
{
fprintf (fp, "%s\n",
(cur_status & 1)? "USABLE":
(cur_status & 4)? "ACTIVE":
(cur_status & 2)? "PRESENT": "NOCARD");
fclose (fp);
}
xfree (fname);
homestr = make_filename (gnupg_homedir (), NULL);
if (gpgrt_asprintf (&envstr, "GNUPGHOME=%s", homestr) < 0)
log_error ("out of core while building environment\n");
else
{
gpg_error_t err;
const char *args[9], *envs[2];
char numbuf1[30], numbuf2[30], numbuf3[30];
envs[0] = envstr;
envs[1] = NULL;
sprintf (numbuf1, "%d", slot);
sprintf (numbuf2, "0x%04X", old_status);
sprintf (numbuf3, "0x%04X", cur_status);
args[0] = "--reader-port";
args[1] = numbuf1;
args[2] = "--old-code";
args[3] = numbuf2;
args[4] = "--new-code";
args[5] = numbuf3;
args[6] = "--status";
args[7] = ((cur_status & 1)? "USABLE":
(cur_status & 4)? "ACTIVE":
(cur_status & 2)? "PRESENT": "NOCARD");
args[8] = NULL;
fname = make_filename (gnupg_homedir (), "scd-event", NULL);
err = gnupg_spawn_process_detached (fname, args, envs);
if (err && gpg_err_code (err) != GPG_ERR_ENOENT)
log_error ("failed to run event handler '%s': %s\n",
fname, gpg_strerror (err));
xfree (fname);
xfree (envstr);
}
xfree (homestr);
}
int
scd_update_reader_status_file (void)
{
app_t a, app_next;
int periodical_check_needed = 0;
npth_mutex_lock (&app_list_lock);
for (a = app_top; a; a = app_next)
{
int sw;
unsigned int status;
lock_app (a, NULL);
app_next = a->next;
if (a->reset_requested)
status = 0;
else
{
sw = apdu_get_status (a->slot, 0, &status);
if (sw == SW_HOST_NO_READER)
{
/* Most likely the _reader_ has been unplugged. */
status = 0;
}
else if (sw)
{
/* Get status failed. Ignore that. */
if (a->periodical_check_needed)
periodical_check_needed = 1;
unlock_app (a);
continue;
}
}
if (a->card_status != status)
{
report_change (a->slot, a->card_status, status);
send_client_notifications (a, status == 0);
if (status == 0)
{
log_debug ("Removal of a card: %d\n", a->slot);
apdu_close_reader (a->slot);
deallocate_app (a);
}
else
{
a->card_status = status;
if (a->periodical_check_needed)
periodical_check_needed = 1;
unlock_app (a);
}
}
else
{
if (a->periodical_check_needed)
periodical_check_needed = 1;
unlock_app (a);
}
}
npth_mutex_unlock (&app_list_lock);
return periodical_check_needed;
}
/* This function must be called once to initialize this module. This
has to be done before a second thread is spawned. We can't do the
static initialization because Pth emulation code might not be able
to do a static init; in particular, it is not possible for W32. */
gpg_error_t
initialize_module_command (void)
{
gpg_error_t err;
if (npth_mutex_init (&app_list_lock, NULL))
{
err = gpg_error_from_syserror ();
log_error ("app: error initializing mutex: %s\n", gpg_strerror (err));
return err;
}
return apdu_init ();
}
void
app_send_card_list (ctrl_t ctrl)
{
app_t a;
char buf[65];
npth_mutex_lock (&app_list_lock);
for (a = app_top; a; a = a->next)
{
if (DIM (buf) < 2 * a->serialnolen + 1)
continue;
bin2hex (a->serialno, a->serialnolen, buf);
send_status_direct (ctrl, "SERIALNO", buf);
}
npth_mutex_unlock (&app_list_lock);
}
diff --git a/scd/command.c b/scd/command.c
index ea4ccbcda..044831f01 100644
--- a/scd/command.c
+++ b/scd/command.c
@@ -1,2041 +1,2069 @@
/* command.c - SCdaemon command handler
* Copyright (C) 2001, 2002, 2003, 2004, 2005,
* 2007, 2008, 2009, 2011 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <signal.h>
#ifdef USE_NPTH
# include <npth.h>
#endif
#include "scdaemon.h"
#include <assuan.h>
#include <ksba.h>
#include "app-common.h"
#include "iso7816.h"
#include "apdu.h" /* Required for apdu_*_reader (). */
#include "atr.h"
#ifdef HAVE_LIBUSB
#include "ccid-driver.h"
#endif
#include "../common/asshelp.h"
#include "../common/server-help.h"
/* Maximum length allowed as a PIN; used for INQUIRE NEEDPIN */
#define MAXLEN_PIN 100
/* Maximum allowed size of key data as used in inquiries. */
#define MAXLEN_KEYDATA 4096
/* Maximum allowed total data size for SETDATA. */
#define MAXLEN_SETDATA 4096
/* Maximum allowed size of certificate data as used in inquiries. */
#define MAXLEN_CERTDATA 16384
#define set_error(e,t) assuan_set_error (ctx, gpg_error (e), (t))
#define IS_LOCKED(c) (locked_session && locked_session != (c)->server_local)
/* Data used to associate an Assuan context with local server data.
This object describes the local properties of one session. */
struct server_local_s
{
/* We keep a list of all active sessions with the anchor at
SESSION_LIST (see below). This field is used for linking. */
struct server_local_s *next_session;
/* This object is usually assigned to a CTRL object (which is
globally visible). While enumerating all sessions we sometimes
need to access data of the CTRL object; thus we keep a
backpointer here. */
ctrl_t ctrl_backlink;
/* The Assuan context used by this session/server. */
assuan_context_t assuan_ctx;
#ifdef HAVE_W32_SYSTEM
void *event_signal; /* Or NULL if not used. */
#else
int event_signal; /* Or 0 if not used. */
#endif
/* True if the card has been removed and a reset is required to
continue operation. */
int card_removed;
/* If set to true we will be terminate ourself at the end of the
this session. */
int stopme;
};
/* To keep track of all running sessions, we link all active server
contexts and the anchor in this variable. */
static struct server_local_s *session_list;
/* If a session has been locked we store a link to its server object
in this variable. */
static struct server_local_s *locked_session;
/* Convert the STRING into a newly allocated buffer while translating
the hex numbers. Stops at the first invalid character. Blanks and
colons are allowed to separate the hex digits. Returns NULL on
error or a newly malloced buffer and its length in LENGTH. */
static unsigned char *
hex_to_buffer (const char *string, size_t *r_length)
{
unsigned char *buffer;
const char *s;
size_t n;
buffer = xtrymalloc (strlen (string)+1);
if (!buffer)
return NULL;
for (s=string, n=0; *s; s++)
{
if (spacep (s) || *s == ':')
continue;
if (hexdigitp (s) && hexdigitp (s+1))
{
buffer[n++] = xtoi_2 (s);
s++;
}
else
break;
}
*r_length = n;
return buffer;
}
/* Reset the card and free the application context. With SEND_RESET
set to true actually send a RESET to the reader; this is the normal
way of calling the function. */
static void
do_reset (ctrl_t ctrl, int send_reset)
{
app_t app = ctrl->app_ctx;
if (app)
app_reset (app, ctrl, IS_LOCKED (ctrl)? 0: send_reset);
/* If we hold a lock, unlock now. */
if (locked_session && ctrl->server_local == locked_session)
{
locked_session = NULL;
log_info ("implicitly unlocking due to RESET\n");
}
}
static gpg_error_t
reset_notify (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
(void) line;
do_reset (ctrl, 1);
return 0;
}
static gpg_error_t
option_handler (assuan_context_t ctx, const char *key, const char *value)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
if (!strcmp (key, "event-signal"))
{
/* A value of 0 is allowed to reset the event signal. */
#ifdef HAVE_W32_SYSTEM
if (!*value)
return gpg_error (GPG_ERR_ASS_PARAMETER);
#ifdef _WIN64
ctrl->server_local->event_signal = (void *)strtoull (value, NULL, 16);
#else
ctrl->server_local->event_signal = (void *)strtoul (value, NULL, 16);
#endif
#else
int i = *value? atoi (value) : -1;
if (i < 0)
return gpg_error (GPG_ERR_ASS_PARAMETER);
ctrl->server_local->event_signal = i;
#endif
}
return 0;
}
/* If the card has not yet been opened, do it. */
static gpg_error_t
open_card (ctrl_t ctrl)
{
/* If we ever got a card not present error code, return that. Only
the SERIALNO command and a reset are able to clear from that
state. */
if (ctrl->server_local->card_removed)
return gpg_error (GPG_ERR_CARD_REMOVED);
if ( IS_LOCKED (ctrl) )
return gpg_error (GPG_ERR_LOCKED);
if (ctrl->app_ctx)
return 0;
return select_application (ctrl, NULL, &ctrl->app_ctx, 0, NULL, 0);
}
/* Explicitly open a card for a specific use of APPTYPE or SERIALNO. */
static gpg_error_t
open_card_with_request (ctrl_t ctrl, const char *apptype, const char *serialno)
{
gpg_error_t err;
unsigned char *serialno_bin = NULL;
size_t serialno_bin_len = 0;
app_t app = ctrl->app_ctx;
/* If we are already initialized for one specific application we
need to check that the client didn't requested a specific
application different from the one in use before we continue. */
if (apptype && ctrl->app_ctx)
return check_application_conflict (apptype, ctrl->app_ctx);
/* Re-scan USB devices. Release APP, before the scan. */
ctrl->app_ctx = NULL;
release_application (app, 0);
if (serialno)
serialno_bin = hex_to_buffer (serialno, &serialno_bin_len);
err = select_application (ctrl, apptype, &ctrl->app_ctx, 1,
serialno_bin, serialno_bin_len);
xfree (serialno_bin);
return err;
}
static const char hlp_serialno[] =
"SERIALNO [--demand=<serialno>] [<apptype>]\n"
"\n"
"Return the serial number of the card using a status response. This\n"
"function should be used to check for the presence of a card.\n"
"\n"
"If --demand is given, an application on the card with SERIALNO is\n"
"selected and an error is returned if no such card available.\n"
"\n"
"If APPTYPE is given, an application of that type is selected and an\n"
"error is returned if the application is not supported or available.\n"
"The default is to auto-select the application using a hardwired\n"
"preference system. Note, that a future extension to this function\n"
"may enable specifying a list and order of applications to try.\n"
"\n"
"This function is special in that it can be used to reset the card.\n"
"Most other functions will return an error when a card change has\n"
"been detected and the use of this function is therefore required.\n"
"\n"
"Background: We want to keep the client clear of handling card\n"
"changes between operations; i.e. the client can assume that all\n"
"operations are done on the same card unless he calls this function.";
static gpg_error_t
cmd_serialno (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
struct server_local_s *sl;
int rc = 0;
char *serial;
const char *demand;
if ( IS_LOCKED (ctrl) )
return gpg_error (GPG_ERR_LOCKED);
if ((demand = has_option_name (line, "--demand")))
{
if (*demand != '=')
return set_error (GPG_ERR_ASS_PARAMETER, "missing value for option");
line = (char *)++demand;
for (; *line && !spacep (line); line++)
;
if (*line)
*line++ = 0;
}
else
demand = NULL;
/* Clear the remove flag so that the open_card is able to reread it. */
if (ctrl->server_local->card_removed)
ctrl->server_local->card_removed = 0;
if ((rc = open_card_with_request (ctrl, *line? line:NULL, demand)))
{
ctrl->server_local->card_removed = 1;
return rc;
}
/* Success, clear the card_removed flag for all sessions. */
for (sl=session_list; sl; sl = sl->next_session)
{
ctrl_t c = sl->ctrl_backlink;
if (c != ctrl)
c->server_local->card_removed = 0;
}
serial = app_get_serialno (ctrl->app_ctx);
if (!serial)
return gpg_error (GPG_ERR_INV_VALUE);
rc = assuan_write_status (ctx, "SERIALNO", serial);
xfree (serial);
return rc;
}
static const char hlp_learn[] =
"LEARN [--force] [--keypairinfo]\n"
"\n"
"Learn all useful information of the currently inserted card. When\n"
"used without the force options, the command might do an INQUIRE\n"
"like this:\n"
"\n"
" INQUIRE KNOWNCARDP <hexstring_with_serialNumber>\n"
"\n"
"The client should just send an \"END\" if the processing should go on\n"
"or a \"CANCEL\" to force the function to terminate with a Cancel\n"
"error message.\n"
"\n"
"With the option --keypairinfo only KEYPARIINFO status lines are\n"
"returned.\n"
"\n"
"The response of this command is a list of status lines formatted as\n"
"this:\n"
"\n"
" S APPTYPE <apptype>\n"
"\n"
"This returns the type of the application, currently the strings:\n"
"\n"
" P15 = PKCS-15 structure used\n"
" DINSIG = DIN SIG\n"
" OPENPGP = OpenPGP card\n"
" PIV = PIV card\n"
" NKS = NetKey card\n"
"\n"
"are implemented. These strings are aliases for the AID\n"
"\n"
" S KEYPAIRINFO <hexstring_with_keygrip> <hexstring_with_id>\n"
"\n"
"If there is no certificate yet stored on the card a single 'X' is\n"
"returned as the keygrip. In addition to the keypair info, information\n"
"about all certificates stored on the card is also returned:\n"
"\n"
" S CERTINFO <certtype> <hexstring_with_id>\n"
"\n"
"Where CERTTYPE is a number indicating the type of certificate:\n"
" 0 := Unknown\n"
" 100 := Regular X.509 cert\n"
" 101 := Trusted X.509 cert\n"
" 102 := Useful X.509 cert\n"
" 110 := Root CA cert in a special format (e.g. DINSIG)\n"
" 111 := Root CA cert as standard X509 cert.\n"
"\n"
"For certain cards, more information will be returned:\n"
"\n"
" S KEY-FPR <no> <hexstring>\n"
"\n"
"For OpenPGP cards this returns the stored fingerprints of the\n"
"keys. This can be used check whether a key is available on the\n"
"card. NO may be 1, 2 or 3.\n"
"\n"
" S CA-FPR <no> <hexstring>\n"
"\n"
"Similar to above, these are the fingerprints of keys assumed to be\n"
"ultimately trusted.\n"
"\n"
" S DISP-NAME <name_of_card_holder>\n"
"\n"
"The name of the card holder as stored on the card; percent\n"
"escaping takes place, spaces are encoded as '+'\n"
"\n"
" S PUBKEY-URL <url>\n"
"\n"
"The URL to be used for locating the entire public key.\n"
" \n"
"Note, that this function may even be used on a locked card.";
static gpg_error_t
cmd_learn (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc = 0;
int only_keypairinfo = has_option (line, "--keypairinfo");
if ((rc = open_card (ctrl)))
return rc;
/* Unless the force option is used we try a shortcut by identifying
the card using a serial number and inquiring the client with
that. The client may choose to cancel the operation if he already
knows about this card */
if (!only_keypairinfo)
{
const char *reader;
char *serial;
app_t app = ctrl->app_ctx;
if (!app)
return gpg_error (GPG_ERR_CARD_NOT_PRESENT);
reader = apdu_get_reader_name (app->slot);
if (!reader)
return out_of_core ();
send_status_direct (ctrl, "READER", reader);
/* No need to free the string of READER. */
serial = app_get_serialno (ctrl->app_ctx);
if (!serial)
return gpg_error (GPG_ERR_INV_VALUE);
rc = assuan_write_status (ctx, "SERIALNO", serial);
if (rc < 0)
{
xfree (serial);
return out_of_core ();
}
if (!has_option (line, "--force"))
{
char *command;
rc = gpgrt_asprintf (&command, "KNOWNCARDP %s", serial);
if (rc < 0)
{
xfree (serial);
return out_of_core ();
}
rc = assuan_inquire (ctx, command, NULL, NULL, 0);
xfree (command);
if (rc)
{
if (gpg_err_code (rc) != GPG_ERR_ASS_CANCELED)
log_error ("inquire KNOWNCARDP failed: %s\n",
gpg_strerror (rc));
xfree (serial);
return rc;
}
/* Not canceled, so we have to proceed. */
}
xfree (serial);
}
/* Let the application print out its collection of useful status
information. */
if (!rc)
rc = app_write_learn_status (ctrl->app_ctx, ctrl, only_keypairinfo);
return rc;
}
static const char hlp_readcert[] =
"READCERT <hexified_certid>|<keyid>|<oid>\n"
"\n"
"Note, that this function may even be used on a locked card.";
static gpg_error_t
cmd_readcert (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
unsigned char *cert;
size_t ncert;
if ((rc = open_card (ctrl)))
return rc;
line = xstrdup (line); /* Need a copy of the line. */
rc = app_readcert (ctrl->app_ctx, ctrl, line, &cert, &ncert);
if (rc)
log_error ("app_readcert failed: %s\n", gpg_strerror (rc));
xfree (line);
line = NULL;
if (!rc)
{
rc = assuan_send_data (ctx, cert, ncert);
xfree (cert);
if (rc)
return rc;
}
return rc;
}
static const char hlp_readkey[] =
"READKEY [--advanced] <keyid>|<oid>\n"
"\n"
"Return the public key for the given cert or key ID as a standard\n"
"S-expression.\n"
"In --advanced mode it returns the S-expression in advanced format.\n"
"\n"
"Note that this function may even be used on a locked card.";
static gpg_error_t
cmd_readkey (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
int advanced = 0;
unsigned char *cert = NULL;
size_t ncert, n;
ksba_cert_t kc = NULL;
ksba_sexp_t p = NULL;
unsigned char *pk;
size_t pklen;
if ((rc = open_card (ctrl)))
return rc;
if (has_option (line, "--advanced"))
advanced = 1;
line = skip_options (line);
line = xstrdup (line); /* Need a copy of the line. */
/* If the application supports the READKEY function we use that.
Otherwise we use the old way by extracting it from the
certificate. */
rc = app_readkey (ctrl->app_ctx, ctrl, advanced, line, &pk, &pklen);
if (!rc)
{ /* Yeah, got that key - send it back. */
rc = assuan_send_data (ctx, pk, pklen);
xfree (pk);
xfree (line);
line = NULL;
goto leave;
}
if (gpg_err_code (rc) != GPG_ERR_UNSUPPORTED_OPERATION)
log_error ("app_readkey failed: %s\n", gpg_strerror (rc));
else
{
rc = app_readcert (ctrl->app_ctx, ctrl, line, &cert, &ncert);
if (rc)
log_error ("app_readcert failed: %s\n", gpg_strerror (rc));
}
xfree (line);
line = NULL;
if (rc)
goto leave;
rc = ksba_cert_new (&kc);
if (rc)
goto leave;
rc = ksba_cert_init_from_mem (kc, cert, ncert);
if (rc)
{
log_error ("failed to parse the certificate: %s\n", gpg_strerror (rc));
goto leave;
}
p = ksba_cert_get_public_key (kc);
if (!p)
{
rc = gpg_error (GPG_ERR_NO_PUBKEY);
goto leave;
}
n = gcry_sexp_canon_len (p, 0, NULL, NULL);
if (advanced)
{
gcry_sexp_t s_key;
rc = gcry_sexp_new (&s_key, (void*)p, n, 0);
if (rc)
goto leave;
pklen = gcry_sexp_sprint (s_key, GCRYSEXP_FMT_ADVANCED, NULL, 0);
pk = xtrymalloc (pklen);
if (!pk)
{
rc = gpg_error_from_syserror ();
goto leave;
}
log_assert (pklen);
gcry_sexp_sprint (s_key, GCRYSEXP_FMT_ADVANCED, pk, pklen);
gcry_sexp_release (s_key);
/* (One less to adjust for the trailing '\0') */
rc = assuan_send_data (ctx, pk, pklen-1);
xfree (pk);
}
else
rc = assuan_send_data (ctx, p, n);
leave:
xfree (p);
ksba_cert_release (kc);
xfree (cert);
return rc;
}
static const char hlp_setdata[] =
"SETDATA [--append] <hexstring>\n"
"\n"
"The client should use this command to tell us the data he want to sign.\n"
"With the option --append, the data is appended to the data set by a\n"
"previous SETDATA command.";
static gpg_error_t
cmd_setdata (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int append;
int n, i, off;
char *p;
unsigned char *buf;
append = (ctrl->in_data.value && has_option (line, "--append"));
line = skip_options (line);
if (locked_session && locked_session != ctrl->server_local)
return gpg_error (GPG_ERR_LOCKED);
/* Parse the hexstring. */
for (p=line,n=0; hexdigitp (p); p++, n++)
;
if (*p)
return set_error (GPG_ERR_ASS_PARAMETER, "invalid hexstring");
if (!n)
return set_error (GPG_ERR_ASS_PARAMETER, "no data given");
if ((n&1))
return set_error (GPG_ERR_ASS_PARAMETER, "odd number of digits");
n /= 2;
if (append)
{
if (ctrl->in_data.valuelen + n > MAXLEN_SETDATA)
return set_error (GPG_ERR_TOO_LARGE,
"limit on total size of data reached");
buf = xtrymalloc (ctrl->in_data.valuelen + n);
}
else
buf = xtrymalloc (n);
if (!buf)
return out_of_core ();
if (append)
{
memcpy (buf, ctrl->in_data.value, ctrl->in_data.valuelen);
off = ctrl->in_data.valuelen;
}
else
off = 0;
for (p=line, i=0; i < n; p += 2, i++)
buf[off+i] = xtoi_2 (p);
xfree (ctrl->in_data.value);
ctrl->in_data.value = buf;
ctrl->in_data.valuelen = off+n;
return 0;
}
static gpg_error_t
pin_cb (void *opaque, const char *info, char **retstr)
{
assuan_context_t ctx = opaque;
char *command;
int rc;
unsigned char *value;
size_t valuelen;
if (!retstr)
{
/* We prompt for pinpad entry. To make sure that the popup has
been show we use an inquire and not just a status message.
We ignore any value returned. */
if (info)
{
log_debug ("prompting for pinpad entry '%s'\n", info);
rc = gpgrt_asprintf (&command, "POPUPPINPADPROMPT %s", info);
if (rc < 0)
return gpg_error (gpg_err_code_from_errno (errno));
rc = assuan_inquire (ctx, command, &value, &valuelen, MAXLEN_PIN);
xfree (command);
}
else
{
log_debug ("dismiss pinpad entry prompt\n");
rc = assuan_inquire (ctx, "DISMISSPINPADPROMPT",
&value, &valuelen, MAXLEN_PIN);
}
if (!rc)
xfree (value);
return rc;
}
*retstr = NULL;
log_debug ("asking for PIN '%s'\n", info);
rc = gpgrt_asprintf (&command, "NEEDPIN %s", info);
if (rc < 0)
return gpg_error (gpg_err_code_from_errno (errno));
/* Fixme: Write an inquire function which returns the result in
secure memory and check all further handling of the PIN. */
rc = assuan_inquire (ctx, command, &value, &valuelen, MAXLEN_PIN);
xfree (command);
if (rc)
return rc;
if (!valuelen || value[valuelen-1])
{
/* We require that the returned value is an UTF-8 string */
xfree (value);
return gpg_error (GPG_ERR_INV_RESPONSE);
}
*retstr = (char*)value;
return 0;
}
static const char hlp_pksign[] =
"PKSIGN [--hash=[rmd160|sha{1,224,256,384,512}|md5]] <hexified_id>\n"
"\n"
"The --hash option is optional; the default is SHA1.";
static gpg_error_t
cmd_pksign (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
unsigned char *outdata;
size_t outdatalen;
char *keyidstr;
int hash_algo;
if (has_option (line, "--hash=rmd160"))
hash_algo = GCRY_MD_RMD160;
else if (has_option (line, "--hash=sha1"))
hash_algo = GCRY_MD_SHA1;
else if (has_option (line, "--hash=sha224"))
hash_algo = GCRY_MD_SHA224;
else if (has_option (line, "--hash=sha256"))
hash_algo = GCRY_MD_SHA256;
else if (has_option (line, "--hash=sha384"))
hash_algo = GCRY_MD_SHA384;
else if (has_option (line, "--hash=sha512"))
hash_algo = GCRY_MD_SHA512;
else if (has_option (line, "--hash=md5"))
hash_algo = GCRY_MD_MD5;
else if (!strstr (line, "--"))
hash_algo = GCRY_MD_SHA1;
else
return set_error (GPG_ERR_ASS_PARAMETER, "invalid hash algorithm");
line = skip_options (line);
if ((rc = open_card (ctrl)))
return rc;
/* We have to use a copy of the key ID because the function may use
the pin_cb which in turn uses the assuan line buffer and thus
overwriting the original line with the keyid */
keyidstr = xtrystrdup (line);
if (!keyidstr)
return out_of_core ();
rc = app_sign (ctrl->app_ctx, ctrl,
keyidstr, hash_algo,
pin_cb, ctx,
ctrl->in_data.value, ctrl->in_data.valuelen,
&outdata, &outdatalen);
xfree (keyidstr);
if (rc)
{
log_error ("app_sign failed: %s\n", gpg_strerror (rc));
}
else
{
rc = assuan_send_data (ctx, outdata, outdatalen);
xfree (outdata);
if (rc)
return rc; /* that is already an assuan error code */
}
return rc;
}
static const char hlp_pkauth[] =
"PKAUTH <hexified_id>";
static gpg_error_t
cmd_pkauth (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
unsigned char *outdata;
size_t outdatalen;
char *keyidstr;
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
/* We have to use a copy of the key ID because the function may use
the pin_cb which in turn uses the assuan line buffer and thus
overwriting the original line with the keyid */
keyidstr = xtrystrdup (line);
if (!keyidstr)
return out_of_core ();
rc = app_auth (ctrl->app_ctx, ctrl, keyidstr, pin_cb, ctx,
ctrl->in_data.value, ctrl->in_data.valuelen,
&outdata, &outdatalen);
xfree (keyidstr);
if (rc)
{
log_error ("app_auth failed: %s\n", gpg_strerror (rc));
}
else
{
rc = assuan_send_data (ctx, outdata, outdatalen);
xfree (outdata);
if (rc)
return rc; /* that is already an assuan error code */
}
return rc;
}
static const char hlp_pkdecrypt[] =
"PKDECRYPT <hexified_id>";
static gpg_error_t
cmd_pkdecrypt (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
unsigned char *outdata;
size_t outdatalen;
char *keyidstr;
unsigned int infoflags;
if ((rc = open_card (ctrl)))
return rc;
keyidstr = xtrystrdup (line);
if (!keyidstr)
return out_of_core ();
rc = app_decipher (ctrl->app_ctx, ctrl, keyidstr, pin_cb, ctx,
ctrl->in_data.value, ctrl->in_data.valuelen,
&outdata, &outdatalen, &infoflags);
xfree (keyidstr);
if (rc)
{
log_error ("app_decipher failed: %s\n", gpg_strerror (rc));
}
else
{
/* If the card driver told us that there is no padding, send a
status line. If there is a padding it is assumed that the
caller knows what padding is used. It would have been better
to always send that information but for backward
compatibility we can't do that. */
if ((infoflags & APP_DECIPHER_INFO_NOPAD))
send_status_direct (ctrl, "PADDING", "0");
rc = assuan_send_data (ctx, outdata, outdatalen);
xfree (outdata);
if (rc)
return rc; /* that is already an assuan error code */
}
return rc;
}
static const char hlp_getattr[] =
"GETATTR <name>\n"
"\n"
"This command is used to retrieve data from a smartcard. The\n"
"allowed names depend on the currently selected smartcard\n"
"application. NAME must be percent and '+' escaped. The value is\n"
"returned through status message, see the LEARN command for details.\n"
"\n"
"However, the current implementation assumes that Name is not escaped;\n"
"this works as long as no one uses arbitrary escaping. \n"
"\n"
"Note, that this function may even be used on a locked card.";
static gpg_error_t
cmd_getattr (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
const char *keyword;
if ((rc = open_card (ctrl)))
return rc;
keyword = line;
for (; *line && !spacep (line); line++)
;
if (*line)
*line++ = 0;
/* (We ignore any garbage for now.) */
/* FIXME: Applications should not return sensitive data if the card
is locked. */
rc = app_getattr (ctrl->app_ctx, ctrl, keyword);
return rc;
}
static const char hlp_setattr[] =
"SETATTR <name> <value> \n"
"\n"
"This command is used to store data on a smartcard. The allowed\n"
"names and values are depend on the currently selected smartcard\n"
"application. NAME and VALUE must be percent and '+' escaped.\n"
"\n"
"However, the current implementation assumes that NAME is not\n"
"escaped; this works as long as no one uses arbitrary escaping.\n"
"\n"
"A PIN will be requested for most NAMEs. See the corresponding\n"
"setattr function of the actually used application (app-*.c) for\n"
"details.";
static gpg_error_t
cmd_setattr (assuan_context_t ctx, char *orig_line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
char *keyword;
int keywordlen;
size_t nbytes;
char *line, *linebuf;
if ((rc = open_card (ctrl)))
return rc;
/* We need to use a copy of LINE, because PIN_CB uses the same
context and thus reuses the Assuan provided LINE. */
line = linebuf = xtrystrdup (orig_line);
if (!line)
return out_of_core ();
keyword = line;
for (keywordlen=0; *line && !spacep (line); line++, keywordlen++)
;
if (*line)
*line++ = 0;
while (spacep (line))
line++;
nbytes = percent_plus_unescape_inplace (line, 0);
rc = app_setattr (ctrl->app_ctx, ctrl, keyword, pin_cb, ctx,
(const unsigned char*)line, nbytes);
xfree (linebuf);
return rc;
}
static const char hlp_writecert[] =
"WRITECERT <hexified_certid>\n"
"\n"
"This command is used to store a certifciate on a smartcard. The\n"
"allowed certids depend on the currently selected smartcard\n"
"application. The actual certifciate is requested using the inquiry\n"
"\"CERTDATA\" and needs to be provided in its raw (e.g. DER) form.\n"
"\n"
"In almost all cases a PIN will be requested. See the related\n"
"writecert function of the actually used application (app-*.c) for\n"
"details.";
static gpg_error_t
cmd_writecert (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
char *certid;
unsigned char *certdata;
size_t certdatalen;
line = skip_options (line);
if (!*line)
return set_error (GPG_ERR_ASS_PARAMETER, "no certid given");
certid = line;
while (*line && !spacep (line))
line++;
*line = 0;
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
certid = xtrystrdup (certid);
if (!certid)
return out_of_core ();
/* Now get the actual keydata. */
rc = assuan_inquire (ctx, "CERTDATA",
&certdata, &certdatalen, MAXLEN_CERTDATA);
if (rc)
{
xfree (certid);
return rc;
}
/* Write the certificate to the card. */
rc = app_writecert (ctrl->app_ctx, ctrl, certid,
pin_cb, ctx, certdata, certdatalen);
xfree (certid);
xfree (certdata);
return rc;
}
static const char hlp_writekey[] =
"WRITEKEY [--force] <keyid> \n"
"\n"
"This command is used to store a secret key on a smartcard. The\n"
"allowed keyids depend on the currently selected smartcard\n"
"application. The actual keydata is requested using the inquiry\n"
"\"KEYDATA\" and need to be provided without any protection. With\n"
"--force set an existing key under this KEYID will get overwritten.\n"
"The keydata is expected to be the usual canonical encoded\n"
"S-expression.\n"
"\n"
"A PIN will be requested for most NAMEs. See the corresponding\n"
"writekey function of the actually used application (app-*.c) for\n"
"details.";
static gpg_error_t
cmd_writekey (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
char *keyid;
int force = has_option (line, "--force");
unsigned char *keydata;
size_t keydatalen;
line = skip_options (line);
if (!*line)
return set_error (GPG_ERR_ASS_PARAMETER, "no keyid given");
keyid = line;
while (*line && !spacep (line))
line++;
*line = 0;
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
keyid = xtrystrdup (keyid);
if (!keyid)
return out_of_core ();
/* Now get the actual keydata. */
assuan_begin_confidential (ctx);
rc = assuan_inquire (ctx, "KEYDATA", &keydata, &keydatalen, MAXLEN_KEYDATA);
assuan_end_confidential (ctx);
if (rc)
{
xfree (keyid);
return rc;
}
/* Write the key to the card. */
rc = app_writekey (ctrl->app_ctx, ctrl, keyid, force? 1:0,
pin_cb, ctx, keydata, keydatalen);
xfree (keyid);
xfree (keydata);
return rc;
}
static const char hlp_genkey[] =
"GENKEY [--force] [--timestamp=<isodate>] <no>\n"
"\n"
"Generate a key on-card identified by NO, which is application\n"
"specific. Return values are application specific. For OpenPGP\n"
"cards 3 status lines are returned:\n"
"\n"
" S KEY-FPR <hexstring>\n"
" S KEY-CREATED-AT <seconds_since_epoch>\n"
" S KEY-DATA [-|p|n] <hexdata>\n"
"\n"
" 'p' and 'n' are the names of the RSA parameters; '-' is used to\n"
" indicate that HEXDATA is the first chunk of a parameter given\n"
" by the next KEY-DATA.\n"
"\n"
"--force is required to overwrite an already existing key. The\n"
"KEY-CREATED-AT is required for further processing because it is\n"
"part of the hashed key material for the fingerprint.\n"
"\n"
"If --timestamp is given an OpenPGP key will be created using this\n"
"value. The value needs to be in ISO Format; e.g.\n"
"\"--timestamp=20030316T120000\" and after 1970-01-01 00:00:00.\n"
"\n"
"The public part of the key can also later be retrieved using the\n"
"READKEY command.";
static gpg_error_t
cmd_genkey (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
char *keyno;
int force;
const char *s;
time_t timestamp;
force = has_option (line, "--force");
if ((s=has_option_name (line, "--timestamp")))
{
if (*s != '=')
return set_error (GPG_ERR_ASS_PARAMETER, "missing value for option");
timestamp = isotime2epoch (s+1);
if (timestamp < 1)
return set_error (GPG_ERR_ASS_PARAMETER, "invalid time value");
}
else
timestamp = 0;
line = skip_options (line);
if (!*line)
return set_error (GPG_ERR_ASS_PARAMETER, "no key number given");
keyno = line;
while (*line && !spacep (line))
line++;
*line = 0;
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
keyno = xtrystrdup (keyno);
if (!keyno)
return out_of_core ();
rc = app_genkey (ctrl->app_ctx, ctrl, keyno, force? 1:0,
timestamp, pin_cb, ctx);
xfree (keyno);
return rc;
}
static const char hlp_random[] =
"RANDOM <nbytes>\n"
"\n"
"Get NBYTES of random from the card and send them back as data.\n"
"This usually involves EEPROM write on the card and thus excessive\n"
"use of this command may destroy the card.\n"
"\n"
"Note, that this function may be even be used on a locked card.";
static gpg_error_t
cmd_random (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
size_t nbytes;
unsigned char *buffer;
if (!*line)
return set_error (GPG_ERR_ASS_PARAMETER,
"number of requested bytes missing");
nbytes = strtoul (line, NULL, 0);
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
buffer = xtrymalloc (nbytes);
if (!buffer)
return out_of_core ();
rc = app_get_challenge (ctrl->app_ctx, ctrl, nbytes, buffer);
if (!rc)
{
rc = assuan_send_data (ctx, buffer, nbytes);
xfree (buffer);
return rc; /* that is already an assuan error code */
}
xfree (buffer);
return rc;
}
static const char hlp_passwd[] =
- "PASSWD [--reset] [--nullpin] <chvno>\n"
+ "PASSWD [--reset] [--nullpin] [--clear] <chvno>\n"
"\n"
"Change the PIN or, if --reset is given, reset the retry counter of\n"
"the card holder verification vector CHVNO. The option --nullpin is\n"
- "used for TCOS cards to set the initial PIN. The format of CHVNO\n"
- "depends on the card application.";
+ "used for TCOS cards to set the initial PIN. The option --clear clears\n"
+ "the security status associated with the PIN so that the PIN needs to\n"
+ "be presented again. The format of CHVNO depends on the card application.";
static gpg_error_t
cmd_passwd (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
char *chvnostr;
unsigned int flags = 0;
if (has_option (line, "--reset"))
flags |= APP_CHANGE_FLAG_RESET;
if (has_option (line, "--nullpin"))
flags |= APP_CHANGE_FLAG_NULLPIN;
+ if (has_option (line, "--clear"))
+ flags |= APP_CHANGE_FLAG_CLEAR;
line = skip_options (line);
if (!*line)
return set_error (GPG_ERR_ASS_PARAMETER, "no CHV number given");
chvnostr = line;
while (*line && !spacep (line))
line++;
*line = 0;
+ /* Do not allow other flags aside of --clear. */
+ if ((flags & APP_CHANGE_FLAG_CLEAR) && (flags & ~APP_CHANGE_FLAG_CLEAR))
+ return set_error (GPG_ERR_UNSUPPORTED_OPERATION,
+ "--clear used with other options");
+
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
chvnostr = xtrystrdup (chvnostr);
if (!chvnostr)
return out_of_core ();
rc = app_change_pin (ctrl->app_ctx, ctrl, chvnostr, flags, pin_cb, ctx);
if (rc)
log_error ("command passwd failed: %s\n", gpg_strerror (rc));
xfree (chvnostr);
return rc;
}
static const char hlp_checkpin[] =
"CHECKPIN <idstr>\n"
"\n"
"Perform a VERIFY operation without doing anything else. This may\n"
"be used to initialize a the PIN cache earlier to long lasting\n"
"operations. Its use is highly application dependent.\n"
"\n"
"For OpenPGP:\n"
"\n"
" Perform a simple verify operation for CHV1 and CHV2, so that\n"
" further operations won't ask for CHV2 and it is possible to do a\n"
" cheap check on the PIN: If there is something wrong with the PIN\n"
" entry system, only the regular CHV will get blocked and not the\n"
" dangerous CHV3. IDSTR is the usual card's serial number in hex\n"
" notation; an optional fingerprint part will get ignored. There\n"
" is however a special mode if the IDSTR is sffixed with the\n"
" literal string \"[CHV3]\": In this case the Admin PIN is checked\n"
" if and only if the retry counter is still at 3.\n"
"\n"
"For Netkey:\n"
"\n"
" Any of the valid PIN Ids may be used. These are the strings:\n"
"\n"
" PW1.CH - Global password 1\n"
" PW2.CH - Global password 2\n"
" PW1.CH.SIG - SigG password 1\n"
" PW2.CH.SIG - SigG password 2\n"
"\n"
" For a definitive list, see the implementation in app-nks.c.\n"
" Note that we call a PW2.* PIN a \"PUK\" despite that since TCOS\n"
" 3.0 they are technically alternative PINs used to mutally\n"
" unblock each other.";
static gpg_error_t
cmd_checkpin (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
char *idstr;
if ((rc = open_card (ctrl)))
return rc;
if (!ctrl->app_ctx)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
/* We have to use a copy of the key ID because the function may use
the pin_cb which in turn uses the assuan line buffer and thus
overwriting the original line with the keyid. */
idstr = xtrystrdup (line);
if (!idstr)
return out_of_core ();
rc = app_check_pin (ctrl->app_ctx, ctrl, idstr, pin_cb, ctx);
xfree (idstr);
if (rc)
log_error ("app_check_pin failed: %s\n", gpg_strerror (rc));
return rc;
}
static const char hlp_lock[] =
"LOCK [--wait]\n"
"\n"
"Grant exclusive card access to this session. Note that there is\n"
"no lock counter used and a second lock from the same session will\n"
"be ignored. A single unlock (or RESET) unlocks the session.\n"
"Return GPG_ERR_LOCKED if another session has locked the reader.\n"
"\n"
"If the option --wait is given the command will wait until a\n"
"lock has been released.";
static gpg_error_t
cmd_lock (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc = 0;
retry:
if (locked_session)
{
if (locked_session != ctrl->server_local)
rc = gpg_error (GPG_ERR_LOCKED);
}
else
locked_session = ctrl->server_local;
#ifdef USE_NPTH
if (rc && has_option (line, "--wait"))
{
rc = 0;
npth_sleep (1); /* Better implement an event mechanism. However,
for card operations this should be
sufficient. */
/* FIXME: Need to check that the connection is still alive.
This can be done by issuing status messages. */
goto retry;
}
#endif /*USE_NPTH*/
if (rc)
log_error ("cmd_lock failed: %s\n", gpg_strerror (rc));
return rc;
}
static const char hlp_unlock[] =
"UNLOCK\n"
"\n"
"Release exclusive card access.";
static gpg_error_t
cmd_unlock (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc = 0;
(void)line;
if (locked_session)
{
if (locked_session != ctrl->server_local)
rc = gpg_error (GPG_ERR_LOCKED);
else
locked_session = NULL;
}
else
rc = gpg_error (GPG_ERR_NOT_LOCKED);
if (rc)
log_error ("cmd_unlock failed: %s\n", gpg_strerror (rc));
return rc;
}
static const char hlp_getinfo[] =
"GETINFO <what>\n"
"\n"
"Multi purpose command to return certain information. \n"
"Supported values of WHAT are:\n"
"\n"
" version - Return the version of the program.\n"
" pid - Return the process id of the server.\n"
" socket_name - Return the name of the socket.\n"
" connections - Return number of active connections.\n"
" status - Return the status of the current reader (in the future,\n"
" may also return the status of all readers). The status\n"
" is a list of one-character flags. The following flags\n"
" are currently defined:\n"
" 'u' Usable card present.\n"
" 'r' Card removed. A reset is necessary.\n"
" These flags are exclusive.\n"
" reader_list - Return a list of detected card readers. Does\n"
" currently only work with the internal CCID driver.\n"
" deny_admin - Returns OK if admin commands are not allowed or\n"
" GPG_ERR_GENERAL if admin commands are allowed.\n"
" app_list - Return a list of supported applications. One\n"
" application per line, fields delimited by colons,\n"
" first field is the name.\n"
" card_list - Return a list of serial numbers of active cards,\n"
" using a status response.";
static gpg_error_t
cmd_getinfo (assuan_context_t ctx, char *line)
{
int rc = 0;
if (!strcmp (line, "version"))
{
const char *s = VERSION;
rc = assuan_send_data (ctx, s, strlen (s));
}
else if (!strcmp (line, "pid"))
{
char numbuf[50];
snprintf (numbuf, sizeof numbuf, "%lu", (unsigned long)getpid ());
rc = assuan_send_data (ctx, numbuf, strlen (numbuf));
}
else if (!strcmp (line, "socket_name"))
{
const char *s = scd_get_socket_name ();
if (s)
rc = assuan_send_data (ctx, s, strlen (s));
else
rc = gpg_error (GPG_ERR_NO_DATA);
}
else if (!strcmp (line, "connections"))
{
char numbuf[20];
snprintf (numbuf, sizeof numbuf, "%d", get_active_connection_count ());
rc = assuan_send_data (ctx, numbuf, strlen (numbuf));
}
else if (!strcmp (line, "status"))
{
ctrl_t ctrl = assuan_get_pointer (ctx);
char flag;
if (open_card (ctrl))
flag = 'r';
else
flag = 'u';
rc = assuan_send_data (ctx, &flag, 1);
}
else if (!strcmp (line, "reader_list"))
{
#ifdef HAVE_LIBUSB
char *s = ccid_get_reader_list ();
#else
char *s = NULL;
#endif
if (s)
rc = assuan_send_data (ctx, s, strlen (s));
else
rc = gpg_error (GPG_ERR_NO_DATA);
xfree (s);
}
else if (!strcmp (line, "deny_admin"))
rc = opt.allow_admin? gpg_error (GPG_ERR_GENERAL) : 0;
else if (!strcmp (line, "app_list"))
{
char *s = get_supported_applications ();
if (s)
rc = assuan_send_data (ctx, s, strlen (s));
else
rc = 0;
xfree (s);
}
else if (!strcmp (line, "card_list"))
{
ctrl_t ctrl = assuan_get_pointer (ctx);
app_send_card_list (ctrl);
}
else
rc = set_error (GPG_ERR_ASS_PARAMETER, "unknown value for WHAT");
return rc;
}
static const char hlp_restart[] =
"RESTART\n"
"\n"
"Restart the current connection; this is a kind of warm reset. It\n"
"deletes the context used by this connection but does not send a\n"
"RESET to the card. Thus the card itself won't get reset. \n"
"\n"
"This is used by gpg-agent to reuse a primary pipe connection and\n"
"may be used by clients to backup from a conflict in the serial\n"
"command; i.e. to select another application.";
static gpg_error_t
cmd_restart (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
app_t app = ctrl->app_ctx;
(void)line;
if (app)
{
ctrl->app_ctx = NULL;
release_application (app, 0);
}
if (locked_session && ctrl->server_local == locked_session)
{
locked_session = NULL;
log_info ("implicitly unlocking due to RESTART\n");
}
return 0;
}
static const char hlp_disconnect[] =
"DISCONNECT\n"
"\n"
"Disconnect the card if the backend supports a disconnect operation.";
static gpg_error_t
cmd_disconnect (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
(void)line;
if (!ctrl->app_ctx)
return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
apdu_disconnect (ctrl->app_ctx->slot);
return 0;
}
static const char hlp_apdu[] =
"APDU [--[dump-]atr] [--more] [--exlen[=N]] [hexstring]\n"
"\n"
"Send an APDU to the current reader. This command bypasses the high\n"
"level functions and sends the data directly to the card. HEXSTRING\n"
"is expected to be a proper APDU. If HEXSTRING is not given no\n"
"commands are set to the card but the command will implictly check\n"
"whether the card is ready for use. \n"
"\n"
"Using the option \"--atr\" returns the ATR of the card as a status\n"
"message before any data like this:\n"
" S CARD-ATR 3BFA1300FF813180450031C173C00100009000B1\n"
"\n"
"Using the option --more handles the card status word MORE_DATA\n"
"(61xx) and concatenates all responses to one block.\n"
"\n"
"Using the option \"--exlen\" the returned APDU may use extended\n"
"length up to N bytes. If N is not given a default value is used\n"
"(currently 4096).";
static gpg_error_t
cmd_apdu (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
app_t app;
int rc;
unsigned char *apdu;
size_t apdulen;
int with_atr;
int handle_more;
const char *s;
size_t exlen;
if (has_option (line, "--dump-atr"))
with_atr = 2;
else
with_atr = has_option (line, "--atr");
handle_more = has_option (line, "--more");
if ((s=has_option_name (line, "--exlen")))
{
if (*s == '=')
exlen = strtoul (s+1, NULL, 0);
else
exlen = 4096;
}
else
exlen = 0;
line = skip_options (line);
if ((rc = open_card (ctrl)))
return rc;
app = ctrl->app_ctx;
if (!app)
return gpg_error (GPG_ERR_CARD_NOT_PRESENT);
if (with_atr)
{
unsigned char *atr;
size_t atrlen;
char hexbuf[400];
atr = apdu_get_atr (app->slot, &atrlen);
if (!atr || atrlen > sizeof hexbuf - 2 )
{
rc = gpg_error (GPG_ERR_INV_CARD);
goto leave;
}
if (with_atr == 2)
{
char *string, *p, *pend;
string = atr_dump (atr, atrlen);
if (string)
{
for (rc=0, p=string; !rc && (pend = strchr (p, '\n')); p = pend+1)
{
rc = assuan_send_data (ctx, p, pend - p + 1);
if (!rc)
rc = assuan_send_data (ctx, NULL, 0);
}
if (!rc && *p)
rc = assuan_send_data (ctx, p, strlen (p));
es_free (string);
if (rc)
goto leave;
}
}
else
{
bin2hex (atr, atrlen, hexbuf);
send_status_info (ctrl, "CARD-ATR", hexbuf, strlen (hexbuf), NULL, 0);
}
xfree (atr);
}
apdu = hex_to_buffer (line, &apdulen);
if (!apdu)
{
rc = gpg_error_from_syserror ();
goto leave;
}
if (apdulen)
{
unsigned char *result = NULL;
size_t resultlen;
rc = apdu_send_direct (app->slot, exlen,
apdu, apdulen, handle_more,
NULL, &result, &resultlen);
if (rc)
log_error ("apdu_send_direct failed: %s\n", gpg_strerror (rc));
else
{
rc = assuan_send_data (ctx, result, resultlen);
xfree (result);
}
}
xfree (apdu);
leave:
return rc;
}
static const char hlp_killscd[] =
"KILLSCD\n"
"\n"
"Commit suicide.";
static gpg_error_t
cmd_killscd (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
(void)line;
ctrl->server_local->stopme = 1;
assuan_set_flag (ctx, ASSUAN_FORCE_CLOSE, 1);
return 0;
}
/* Tell the assuan library about our commands */
static int
register_commands (assuan_context_t ctx)
{
static struct {
const char *name;
assuan_handler_t handler;
const char * const help;
} table[] = {
{ "SERIALNO", cmd_serialno, hlp_serialno },
{ "LEARN", cmd_learn, hlp_learn },
{ "READCERT", cmd_readcert, hlp_readcert },
{ "READKEY", cmd_readkey, hlp_readkey },
{ "SETDATA", cmd_setdata, hlp_setdata },
{ "PKSIGN", cmd_pksign, hlp_pksign },
{ "PKAUTH", cmd_pkauth, hlp_pkauth },
{ "PKDECRYPT", cmd_pkdecrypt,hlp_pkdecrypt },
{ "INPUT", NULL },
{ "OUTPUT", NULL },
{ "GETATTR", cmd_getattr, hlp_getattr },
{ "SETATTR", cmd_setattr, hlp_setattr },
{ "WRITECERT", cmd_writecert,hlp_writecert },
{ "WRITEKEY", cmd_writekey, hlp_writekey },
{ "GENKEY", cmd_genkey, hlp_genkey },
{ "RANDOM", cmd_random, hlp_random },
{ "PASSWD", cmd_passwd, hlp_passwd },
{ "CHECKPIN", cmd_checkpin, hlp_checkpin },
{ "LOCK", cmd_lock, hlp_lock },
{ "UNLOCK", cmd_unlock, hlp_unlock },
{ "GETINFO", cmd_getinfo, hlp_getinfo },
{ "RESTART", cmd_restart, hlp_restart },
{ "DISCONNECT", cmd_disconnect,hlp_disconnect },
{ "APDU", cmd_apdu, hlp_apdu },
{ "KILLSCD", cmd_killscd, hlp_killscd },
{ NULL }
};
int i, rc;
for (i=0; table[i].name; i++)
{
rc = assuan_register_command (ctx, table[i].name, table[i].handler,
table[i].help);
if (rc)
return rc;
}
assuan_set_hello_line (ctx, "GNU Privacy Guard's Smartcard server ready");
assuan_register_reset_notify (ctx, reset_notify);
assuan_register_option_handler (ctx, option_handler);
return 0;
}
/* Startup the server. If FD is given as -1 this is simple pipe
server, otherwise it is a regular server. Returns true if there
are no more active asessions. */
int
scd_command_handler (ctrl_t ctrl, int fd)
{
int rc;
assuan_context_t ctx = NULL;
int stopme;
rc = assuan_new (&ctx);
if (rc)
{
log_error ("failed to allocate assuan context: %s\n",
gpg_strerror (rc));
scd_exit (2);
}
if (fd == -1)
{
assuan_fd_t filedes[2];
filedes[0] = assuan_fdopen (0);
filedes[1] = assuan_fdopen (1);
rc = assuan_init_pipe_server (ctx, filedes);
}
else
{
rc = assuan_init_socket_server (ctx, INT2FD(fd),
ASSUAN_SOCKET_SERVER_ACCEPTED);
}
if (rc)
{
log_error ("failed to initialize the server: %s\n",
gpg_strerror(rc));
scd_exit (2);
}
rc = register_commands (ctx);
if (rc)
{
log_error ("failed to register commands with Assuan: %s\n",
gpg_strerror(rc));
scd_exit (2);
}
assuan_set_pointer (ctx, ctrl);
/* Allocate and initialize the server object. Put it into the list
of active sessions. */
ctrl->server_local = xcalloc (1, sizeof *ctrl->server_local);
ctrl->server_local->next_session = session_list;
session_list = ctrl->server_local;
ctrl->server_local->ctrl_backlink = ctrl;
ctrl->server_local->assuan_ctx = ctx;
/* Command processing loop. */
for (;;)
{
rc = assuan_accept (ctx);
if (rc == -1)
{
break;
}
else if (rc)
{
log_info ("Assuan accept problem: %s\n", gpg_strerror (rc));
break;
}
rc = assuan_process (ctx);
if (rc)
{
log_info ("Assuan processing failed: %s\n", gpg_strerror (rc));
continue;
}
}
/* Cleanup. We don't send an explicit reset to the card. */
do_reset (ctrl, 0);
/* Release the server object. */
if (session_list == ctrl->server_local)
session_list = ctrl->server_local->next_session;
else
{
struct server_local_s *sl;
for (sl=session_list; sl->next_session; sl = sl->next_session)
if (sl->next_session == ctrl->server_local)
break;
if (!sl->next_session)
BUG ();
sl->next_session = ctrl->server_local->next_session;
}
stopme = ctrl->server_local->stopme;
xfree (ctrl->server_local);
ctrl->server_local = NULL;
/* Release the Assuan context. */
assuan_release (ctx);
if (stopme)
scd_exit (0);
/* If there are no more sessions return true. */
return !session_list;
}
/* Send a line with status information via assuan and escape all given
buffers. The variable elements are pairs of (char *, size_t),
terminated with a (NULL, 0). */
void
send_status_info (ctrl_t ctrl, const char *keyword, ...)
{
va_list arg_ptr;
const unsigned char *value;
size_t valuelen;
char buf[950], *p;
size_t n;
assuan_context_t ctx = ctrl->server_local->assuan_ctx;
va_start (arg_ptr, keyword);
p = buf;
n = 0;
while ( (value = va_arg (arg_ptr, const unsigned char *))
&& n < DIM (buf)-2 )
{
valuelen = va_arg (arg_ptr, size_t);
if (!valuelen)
continue; /* empty buffer */
if (n)
{
*p++ = ' ';
n++;
}
for ( ; valuelen && n < DIM (buf)-2; n++, valuelen--, value++)
{
if (*value == '+' || *value == '\"' || *value == '%'
|| *value < ' ')
{
sprintf (p, "%%%02X", *value);
p += 3;
n += 2;
}
else if (*value == ' ')
*p++ = '+';
else
*p++ = *value;
}
}
*p = 0;
assuan_write_status (ctx, keyword, buf);
va_end (arg_ptr);
}
/* Send a ready formatted status line via assuan. */
void
send_status_direct (ctrl_t ctrl, const char *keyword, const char *args)
{
assuan_context_t ctx = ctrl->server_local->assuan_ctx;
if (strchr (args, '\n'))
log_error ("error: LF detected in status line - not sending\n");
else
assuan_write_status (ctx, keyword, args);
}
+/* This status functions expects a printf style format string. No
+ * filtering of the data is done instead the orintf formatted data is
+ * send using assuan_send_status. */
+gpg_error_t
+send_status_printf (ctrl_t ctrl, const char *keyword, const char *format, ...)
+{
+ gpg_error_t err;
+ va_list arg_ptr;
+ assuan_context_t ctx;
+
+ if (!ctrl || !ctrl->server_local || !(ctx = ctrl->server_local->assuan_ctx))
+ return 0;
+
+ va_start (arg_ptr, format);
+ err = vprint_assuan_status (ctx, keyword, format, arg_ptr);
+ va_end (arg_ptr);
+ return err;
+}
+
+
void
popup_prompt (void *opaque, int on)
{
ctrl_t ctrl = opaque;
if (ctrl)
{
assuan_context_t ctx = ctrl->server_local->assuan_ctx;
if (ctx)
{
const char *cmd;
gpg_error_t err;
unsigned char *value;
size_t valuelen;
if (on)
cmd = "POPUPPINPADPROMPT --ack";
else
cmd = "DISMISSPINPADPROMPT";
err = assuan_inquire (ctx, cmd, &value, &valuelen, 100);
if (!err)
xfree (value);
}
}
}
/* Helper to send the clients a status change notification. */
void
send_client_notifications (app_t app, int removal)
{
struct {
pid_t pid;
#ifdef HAVE_W32_SYSTEM
HANDLE handle;
#else
int signo;
#endif
} killed[50];
int killidx = 0;
int kidx;
struct server_local_s *sl;
for (sl=session_list; sl; sl = sl->next_session)
if (sl->ctrl_backlink && sl->ctrl_backlink->app_ctx == app)
{
pid_t pid;
#ifdef HAVE_W32_SYSTEM
HANDLE handle;
#else
int signo;
#endif
if (removal)
{
sl->ctrl_backlink->app_ctx = NULL;
sl->card_removed = 1;
release_application (app, 1);
}
if (!sl->event_signal || !sl->assuan_ctx)
continue;
pid = assuan_get_pid (sl->assuan_ctx);
#ifdef HAVE_W32_SYSTEM
handle = sl->event_signal;
for (kidx=0; kidx < killidx; kidx++)
if (killed[kidx].pid == pid
&& killed[kidx].handle == handle)
break;
if (kidx < killidx)
log_info ("event %p (%p) already triggered for client %d\n",
sl->event_signal, handle, (int)pid);
else
{
log_info ("triggering event %p (%p) for client %d\n",
sl->event_signal, handle, (int)pid);
if (!SetEvent (handle))
log_error ("SetEvent(%p) failed: %s\n",
sl->event_signal, w32_strerror (-1));
if (killidx < DIM (killed))
{
killed[killidx].pid = pid;
killed[killidx].handle = handle;
killidx++;
}
}
#else /*!HAVE_W32_SYSTEM*/
signo = sl->event_signal;
if (pid != (pid_t)(-1) && pid && signo > 0)
{
for (kidx=0; kidx < killidx; kidx++)
if (killed[kidx].pid == pid
&& killed[kidx].signo == signo)
break;
if (kidx < killidx)
log_info ("signal %d already sent to client %d\n",
signo, (int)pid);
else
{
log_info ("sending signal %d to client %d\n",
signo, (int)pid);
kill (pid, signo);
if (killidx < DIM (killed))
{
killed[killidx].pid = pid;
killed[killidx].signo = signo;
killidx++;
}
}
}
#endif /*!HAVE_W32_SYSTEM*/
}
}
diff --git a/scd/scdaemon.h b/scd/scdaemon.h
index 238e6a8fd..73589ade8 100644
--- a/scd/scdaemon.h
+++ b/scd/scdaemon.h
@@ -1,134 +1,137 @@
/* scdaemon.h - Global definitions for the SCdaemon
* Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#ifndef SCDAEMON_H
#define SCDAEMON_H
#ifdef GPG_ERR_SOURCE_DEFAULT
#error GPG_ERR_SOURCE_DEFAULT already defined
#endif
#define GPG_ERR_SOURCE_DEFAULT GPG_ERR_SOURCE_SCD
#include <gpg-error.h>
#include <time.h>
#include <gcrypt.h>
#include "../common/util.h"
#include "../common/sysutils.h"
/* To convey some special hash algorithms we use algorithm numbers
reserved for application use. */
#ifndef GCRY_MODULE_ID_USER
#define GCRY_MODULE_ID_USER 1024
#endif
#define MD_USER_TLS_MD5SHA1 (GCRY_MODULE_ID_USER+1)
/* Maximum length of a digest. */
#define MAX_DIGEST_LEN 64
/* A large struct name "opt" to keep global flags. */
struct
{
unsigned int debug; /* Debug flags (DBG_foo_VALUE). */
int verbose; /* Verbosity level. */
int quiet; /* Be as quiet as possible. */
int dry_run; /* Don't change any persistent data. */
int batch; /* Batch mode. */
const char *ctapi_driver; /* Library to access the ctAPI. */
const char *pcsc_driver; /* Library to access the PC/SC system. */
const char *reader_port; /* NULL or reder port to use. */
int disable_ccid; /* Disable the use of the internal CCID driver. */
int disable_pinpad; /* Do not use a pinpad. */
int enable_pinpad_varlen; /* Use variable length input for pinpad. */
int allow_admin; /* Allow the use of admin commands for certain
cards. */
strlist_t disabled_applications; /* Card applications we do not
want to use. */
unsigned long card_timeout; /* Disconnect after N seconds of inactivity. */
} opt;
#define DBG_MPI_VALUE 2 /* debug mpi details */
#define DBG_CRYPTO_VALUE 4 /* debug low level crypto */
#define DBG_MEMORY_VALUE 32 /* debug memory allocation stuff */
#define DBG_CACHE_VALUE 64 /* debug the caching */
#define DBG_MEMSTAT_VALUE 128 /* show memory statistics */
#define DBG_HASHING_VALUE 512 /* debug hashing operations */
#define DBG_IPC_VALUE 1024
#define DBG_CARD_IO_VALUE 2048
#define DBG_READER_VALUE 4096 /* Trace reader related functions. */
#define DBG_CRYPTO (opt.debug & DBG_CRYPTO_VALUE)
#define DBG_MEMORY (opt.debug & DBG_MEMORY_VALUE)
#define DBG_CACHE (opt.debug & DBG_CACHE_VALUE)
#define DBG_HASHING (opt.debug & DBG_HASHING_VALUE)
#define DBG_IPC (opt.debug & DBG_IPC_VALUE)
#define DBG_CARD_IO (opt.debug & DBG_CARD_IO_VALUE)
#define DBG_READER (opt.debug & DBG_READER_VALUE)
struct server_local_s;
struct app_ctx_s;
struct server_control_s
{
/* Private data used to fire up the connection thread. We use this
structure do avoid an extra allocation for just a few bytes. */
struct {
gnupg_fd_t fd;
} thread_startup;
/* Local data of the server; used only in command.c. */
struct server_local_s *server_local;
/* The application context used with this connection or NULL if none
associated. Note that this is shared with the other connections:
All connections accessing the same reader are using the same
application context. */
struct app_ctx_s *app_ctx;
/* Helper to store the value we are going to sign */
struct
{
unsigned char *value;
int valuelen;
} in_data;
};
typedef struct app_ctx_s *app_t;
/*-- scdaemon.c --*/
void scd_exit (int rc);
const char *scd_get_socket_name (void);
/*-- command.c --*/
gpg_error_t initialize_module_command (void);
int scd_command_handler (ctrl_t, int);
void send_status_info (ctrl_t ctrl, const char *keyword, ...)
GPGRT_ATTR_SENTINEL(1);
void send_status_direct (ctrl_t ctrl, const char *keyword, const char *args);
+gpg_error_t send_status_printf (ctrl_t ctrl, const char *keyword,
+ const char *format, ...) GPGRT_ATTR_PRINTF(3,4);
+
void popup_prompt (void *opaque, int on);
void send_client_notifications (app_t app, int removal);
void scd_kick_the_loop (void);
int get_active_connection_count (void);
/*-- app.c --*/
int scd_update_reader_status_file (void);
#endif /*SCDAEMON_H*/

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