diff --git a/g10/call-agent.c b/g10/call-agent.c index ea530e7ac..fdacf6a90 100644 --- a/g10/call-agent.c +++ b/g10/call-agent.c @@ -1,2356 +1,2358 @@ /* call-agent.c - Divert GPG operations to the agent. * Copyright (C) 2001-2003, 2006-2011, 2013 Free Software Foundation, Inc. * Copyright (C) 2013-2015 Werner Koch * * 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 . */ #include #include #include #include #include #include #include #ifdef HAVE_LOCALE_H #include #endif #include "gpg.h" #include #include "../common/util.h" #include "../common/membuf.h" #include "options.h" #include "../common/i18n.h" #include "../common/asshelp.h" #include "../common/sysutils.h" #include "call-agent.h" #include "../common/status.h" #include "../common/shareddefs.h" #include "../common/host2net.h" #define CONTROL_D ('D' - 'A' + 1) static assuan_context_t agent_ctx = NULL; static int did_early_card_test; struct default_inq_parm_s { ctrl_t ctrl; assuan_context_t ctx; struct { u32 *keyid; u32 *mainkeyid; int pubkey_algo; } keyinfo; }; struct cipher_parm_s { struct default_inq_parm_s *dflt; assuan_context_t ctx; unsigned char *ciphertext; size_t ciphertextlen; }; struct writecert_parm_s { struct default_inq_parm_s *dflt; const unsigned char *certdata; size_t certdatalen; }; struct writekey_parm_s { struct default_inq_parm_s *dflt; const unsigned char *keydata; size_t keydatalen; }; struct genkey_parm_s { struct default_inq_parm_s *dflt; const char *keyparms; const char *passphrase; }; struct import_key_parm_s { struct default_inq_parm_s *dflt; const void *key; size_t keylen; }; struct cache_nonce_parm_s { char **cache_nonce_addr; char **passwd_nonce_addr; }; static gpg_error_t learn_status_cb (void *opaque, const char *line); /* If RC is not 0, write an appropriate status message. */ static void status_sc_op_failure (int rc) { switch (gpg_err_code (rc)) { case 0: break; case GPG_ERR_CANCELED: case GPG_ERR_FULLY_CANCELED: write_status_text (STATUS_SC_OP_FAILURE, "1"); break; case GPG_ERR_BAD_PIN: write_status_text (STATUS_SC_OP_FAILURE, "2"); break; default: write_status (STATUS_SC_OP_FAILURE); break; } } /* This is the default inquiry callback. It mainly handles the Pinentry notifications. */ static gpg_error_t default_inq_cb (void *opaque, const char *line) { gpg_error_t err = 0; struct default_inq_parm_s *parm = opaque; if (has_leading_keyword (line, "PINENTRY_LAUNCHED")) { err = gpg_proxy_pinentry_notify (parm->ctrl, line); if (err) log_error (_("failed to proxy %s inquiry to client\n"), "PINENTRY_LAUNCHED"); /* We do not pass errors to avoid breaking other code. */ } else if ((has_leading_keyword (line, "PASSPHRASE") || has_leading_keyword (line, "NEW_PASSPHRASE")) && opt.pinentry_mode == PINENTRY_MODE_LOOPBACK) { if (have_static_passphrase ()) { const char *s = get_static_passphrase (); err = assuan_send_data (parm->ctx, s, strlen (s)); } else { char *pw; char buf[32]; if (parm->keyinfo.keyid) emit_status_need_passphrase (parm->ctrl, parm->keyinfo.keyid, parm->keyinfo.mainkeyid, parm->keyinfo.pubkey_algo); snprintf (buf, sizeof (buf), "%u", 100); write_status_text (STATUS_INQUIRE_MAXLEN, buf); pw = cpr_get_hidden ("passphrase.enter", _("Enter passphrase: ")); cpr_kill_prompt (); if (*pw == CONTROL_D && !pw[1]) err = gpg_error (GPG_ERR_CANCELED); else err = assuan_send_data (parm->ctx, pw, strlen (pw)); xfree (pw); } } else log_debug ("ignoring gpg-agent inquiry '%s'\n", line); return err; } /* Print a warning if the server's version number is less than our version number. Returns an error code on a connection problem. */ static gpg_error_t warn_version_mismatch (assuan_context_t ctx, const char *servername, int mode) { gpg_error_t err; char *serverversion; const char *myversion = strusage (13); err = get_assuan_server_version (ctx, mode, &serverversion); if (err) log_log (gpg_err_code (err) == GPG_ERR_NOT_SUPPORTED? GPGRT_LOG_INFO : GPGRT_LOG_ERROR, _("error getting version from '%s': %s\n"), servername, gpg_strerror (err)); else if (compare_version_strings (serverversion, myversion) < 0) { char *warn; warn = xtryasprintf (_("server '%s' is older than us (%s < %s)"), servername, serverversion, myversion); if (!warn) err = gpg_error_from_syserror (); else { log_info (_("WARNING: %s\n"), warn); if (!opt.quiet) { log_info (_("Note: Outdated servers may lack important" " security fixes.\n")); log_info (_("Note: Use the command \"%s\" to restart them.\n"), "gpgconf --kill all"); } write_status_strings (STATUS_WARNING, "server_version_mismatch 0", " ", warn, NULL); xfree (warn); } } xfree (serverversion); return err; } #define FLAG_FOR_CARD_SUPPRESS_ERRORS 2 /* Try to connect to the agent via socket or fork it off and work by pipes. Handle the server's initial greeting */ static int start_agent (ctrl_t ctrl, int flag_for_card) { int rc; (void)ctrl; /* Not yet used. */ /* Fixme: We need a context for each thread or serialize the access to the agent. */ if (agent_ctx) rc = 0; else { rc = start_new_gpg_agent (&agent_ctx, GPG_ERR_SOURCE_DEFAULT, opt.agent_program, opt.lc_ctype, opt.lc_messages, opt.session_env, opt.autostart, opt.verbose, DBG_IPC, NULL, NULL); if (!opt.autostart && gpg_err_code (rc) == GPG_ERR_NO_AGENT) { static int shown; if (!shown) { shown = 1; log_info (_("no gpg-agent running in this session\n")); } } else if (!rc && !(rc = warn_version_mismatch (agent_ctx, GPG_AGENT_NAME, 0))) { /* Tell the agent that we support Pinentry notifications. No error checking so that it will work also with older agents. */ assuan_transact (agent_ctx, "OPTION allow-pinentry-notify", NULL, NULL, NULL, NULL, NULL, NULL); /* Tell the agent about what version we are aware. This is here used to indirectly enable GPG_ERR_FULLY_CANCELED. */ assuan_transact (agent_ctx, "OPTION agent-awareness=2.1.0", NULL, NULL, NULL, NULL, NULL, NULL); /* Pass on the pinentry mode. */ if (opt.pinentry_mode) { char *tmp = xasprintf ("OPTION pinentry-mode=%s", str_pinentry_mode (opt.pinentry_mode)); rc = assuan_transact (agent_ctx, tmp, NULL, NULL, NULL, NULL, NULL, NULL); xfree (tmp); if (rc) { log_error ("setting pinentry mode '%s' failed: %s\n", str_pinentry_mode (opt.pinentry_mode), gpg_strerror (rc)); write_status_error ("set_pinentry_mode", rc); } } /* In DE_VS mode under Windows we require that the JENT RNG * is active. */ #ifdef HAVE_W32_SYSTEM if (!rc && opt.compliance == CO_DE_VS) { if (assuan_transact (agent_ctx, "GETINFO jent_active", NULL, NULL, NULL, NULL, NULL, NULL)) { rc = gpg_error (GPG_ERR_FORBIDDEN); log_error (_("%s is not compliant with %s mode\n"), GPG_AGENT_NAME, gnupg_compliance_option_string (opt.compliance)); write_status_error ("random-compliance", rc); } } #endif /*HAVE_W32_SYSTEM*/ } } if (!rc && flag_for_card && !did_early_card_test) { /* Request the serial number of the card for an early test. */ struct agent_card_info_s info; memset (&info, 0, sizeof info); if (!(flag_for_card & FLAG_FOR_CARD_SUPPRESS_ERRORS)) rc = warn_version_mismatch (agent_ctx, SCDAEMON_NAME, 2); if (!rc) rc = assuan_transact (agent_ctx, "SCD SERIALNO openpgp", NULL, NULL, NULL, NULL, learn_status_cb, &info); if (rc && !(flag_for_card & FLAG_FOR_CARD_SUPPRESS_ERRORS)) { switch (gpg_err_code (rc)) { case GPG_ERR_NOT_SUPPORTED: case GPG_ERR_NO_SCDAEMON: write_status_text (STATUS_CARDCTRL, "6"); break; case GPG_ERR_OBJ_TERM_STATE: write_status_text (STATUS_CARDCTRL, "7"); break; default: write_status_text (STATUS_CARDCTRL, "4"); log_info ("selecting openpgp failed: %s\n", gpg_strerror (rc)); break; } } if (!rc && is_status_enabled () && info.serialno) { char *buf; buf = xasprintf ("3 %s", info.serialno); write_status_text (STATUS_CARDCTRL, buf); xfree (buf); } agent_release_card_info (&info); if (!rc) did_early_card_test = 1; } return rc; } /* Return a new malloced string by unescaping the string S. Escaping is percent escaping and '+'/space mapping. A binary nul will silently be replaced by a 0xFF. Function returns NULL to indicate an out of memory status. */ static char * unescape_status_string (const unsigned char *s) { return percent_plus_unescape (s, 0xff); } /* Take a 20 byte hexencoded string and put it into the provided 20 byte buffer FPR in binary format. */ static int unhexify_fpr (const char *hexstr, unsigned char *fpr) { const char *s; int n; for (s=hexstr, n=0; hexdigitp (s); s++, n++) ; if ((*s && *s != ' ') || (n != 40)) return 0; /* no fingerprint (invalid or wrong length). */ for (s=hexstr, n=0; *s && n < 20; s += 2, n++) fpr[n] = xtoi_2 (s); return 1; /* okay */ } /* Take the serial number from LINE and return it verbatim in a newly allocated string. We make sure that only hex characters are returned. */ static char * store_serialno (const char *line) { const char *s; char *p; for (s=line; hexdigitp (s); s++) ; p = xtrymalloc (s + 1 - line); if (p) { memcpy (p, line, s-line); p[s-line] = 0; } return p; } /* This is a dummy data line callback. */ static gpg_error_t dummy_data_cb (void *opaque, const void *buffer, size_t length) { (void)opaque; (void)buffer; (void)length; return 0; } /* A simple callback used to return the serialnumber of a card. */ static gpg_error_t get_serialno_cb (void *opaque, const char *line) { char **serialno = opaque; const char *keyword = line; const char *s; int keywordlen, n; for (keywordlen=0; *line && !spacep (line); line++, keywordlen++) ; while (spacep (line)) line++; if (keywordlen == 8 && !memcmp (keyword, "SERIALNO", keywordlen)) { if (*serialno) return gpg_error (GPG_ERR_CONFLICT); /* Unexpected status line. */ for (n=0,s=line; hexdigitp (s); s++, n++) ; if (!n || (n&1)|| !(spacep (s) || !*s) ) return gpg_error (GPG_ERR_ASS_PARAMETER); *serialno = xtrymalloc (n+1); if (!*serialno) return out_of_core (); memcpy (*serialno, line, n); (*serialno)[n] = 0; } return 0; } /* Release the card info structure INFO. */ void agent_release_card_info (struct agent_card_info_s *info) { int i; if (!info) return; xfree (info->reader); info->reader = NULL; xfree (info->serialno); info->serialno = NULL; xfree (info->apptype); info->apptype = NULL; xfree (info->disp_name); info->disp_name = NULL; xfree (info->disp_lang); info->disp_lang = NULL; xfree (info->pubkey_url); info->pubkey_url = NULL; xfree (info->login_data); info->login_data = NULL; info->cafpr1valid = info->cafpr2valid = info->cafpr3valid = 0; info->fpr1valid = info->fpr2valid = info->fpr3valid = 0; for (i=0; i < DIM(info->private_do); i++) { xfree (info->private_do[i]); info->private_do[i] = NULL; } } static gpg_error_t learn_status_cb (void *opaque, const char *line) { struct agent_card_info_s *parm = opaque; const char *keyword = line; int keywordlen; int i; for (keywordlen=0; *line && !spacep (line); line++, keywordlen++) ; while (spacep (line)) line++; if (keywordlen == 6 && !memcmp (keyword, "READER", keywordlen)) { xfree (parm->reader); parm->reader = unescape_status_string (line); } else if (keywordlen == 8 && !memcmp (keyword, "SERIALNO", keywordlen)) { xfree (parm->serialno); parm->serialno = store_serialno (line); parm->is_v2 = (strlen (parm->serialno) >= 16 && xtoi_2 (parm->serialno+12) >= 2 ); } else if (keywordlen == 7 && !memcmp (keyword, "APPTYPE", keywordlen)) { xfree (parm->apptype); parm->apptype = unescape_status_string (line); } else if (keywordlen == 9 && !memcmp (keyword, "DISP-NAME", keywordlen)) { xfree (parm->disp_name); parm->disp_name = unescape_status_string (line); } else if (keywordlen == 9 && !memcmp (keyword, "DISP-LANG", keywordlen)) { xfree (parm->disp_lang); parm->disp_lang = unescape_status_string (line); } else if (keywordlen == 8 && !memcmp (keyword, "DISP-SEX", keywordlen)) { parm->disp_sex = *line == '1'? 1 : *line == '2' ? 2: 0; } else if (keywordlen == 10 && !memcmp (keyword, "PUBKEY-URL", keywordlen)) { xfree (parm->pubkey_url); parm->pubkey_url = unescape_status_string (line); } else if (keywordlen == 10 && !memcmp (keyword, "LOGIN-DATA", keywordlen)) { xfree (parm->login_data); parm->login_data = unescape_status_string (line); } else if (keywordlen == 11 && !memcmp (keyword, "SIG-COUNTER", keywordlen)) { parm->sig_counter = strtoul (line, NULL, 0); } else if (keywordlen == 10 && !memcmp (keyword, "CHV-STATUS", keywordlen)) { char *p, *buf; buf = p = unescape_status_string (line); if (buf) { while (spacep (p)) p++; parm->chv1_cached = atoi (p); while (*p && !spacep (p)) p++; while (spacep (p)) p++; for (i=0; *p && i < 3; i++) { parm->chvmaxlen[i] = atoi (p); while (*p && !spacep (p)) p++; while (spacep (p)) p++; } for (i=0; *p && i < 3; i++) { parm->chvretry[i] = atoi (p); while (*p && !spacep (p)) p++; while (spacep (p)) p++; } xfree (buf); } } else if (keywordlen == 6 && !memcmp (keyword, "EXTCAP", keywordlen)) { char *p, *p2, *buf; int abool; buf = p = unescape_status_string (line); if (buf) { for (p = strtok (buf, " "); p; p = strtok (NULL, " ")) { p2 = strchr (p, '='); if (p2) { *p2++ = 0; abool = (*p2 == '1'); if (!strcmp (p, "ki")) parm->extcap.ki = abool; else if (!strcmp (p, "aac")) parm->extcap.aac = abool; + else if (!strcmp (p, "kdf")) + parm->extcap.kdf = abool; else if (!strcmp (p, "si")) parm->status_indicator = strtoul (p2, NULL, 10); } } xfree (buf); } } else if (keywordlen == 7 && !memcmp (keyword, "KEY-FPR", keywordlen)) { int no = atoi (line); while (*line && !spacep (line)) line++; while (spacep (line)) line++; if (no == 1) parm->fpr1valid = unhexify_fpr (line, parm->fpr1); else if (no == 2) parm->fpr2valid = unhexify_fpr (line, parm->fpr2); else if (no == 3) parm->fpr3valid = unhexify_fpr (line, parm->fpr3); } else if (keywordlen == 8 && !memcmp (keyword, "KEY-TIME", keywordlen)) { int no = atoi (line); while (* line && !spacep (line)) line++; while (spacep (line)) line++; if (no == 1) parm->fpr1time = strtoul (line, NULL, 10); else if (no == 2) parm->fpr2time = strtoul (line, NULL, 10); else if (no == 3) parm->fpr3time = strtoul (line, NULL, 10); } else if (keywordlen == 11 && !memcmp (keyword, "KEYPAIRINFO", keywordlen)) { const char *hexgrp = line; int no; while (*line && !spacep (line)) line++; while (spacep (line)) line++; if (strncmp (line, "OPENPGP.", 8)) ; else if ((no = atoi (line+8)) == 1) unhexify_fpr (hexgrp, parm->grp1); else if (no == 2) unhexify_fpr (hexgrp, parm->grp2); else if (no == 3) unhexify_fpr (hexgrp, parm->grp3); } else if (keywordlen == 6 && !memcmp (keyword, "CA-FPR", keywordlen)) { int no = atoi (line); while (*line && !spacep (line)) line++; while (spacep (line)) line++; if (no == 1) parm->cafpr1valid = unhexify_fpr (line, parm->cafpr1); else if (no == 2) parm->cafpr2valid = unhexify_fpr (line, parm->cafpr2); else if (no == 3) parm->cafpr3valid = unhexify_fpr (line, parm->cafpr3); } else if (keywordlen == 8 && !memcmp (keyword, "KEY-ATTR", keywordlen)) { int keyno = 0; int algo = PUBKEY_ALGO_RSA; int n = 0; sscanf (line, "%d %d %n", &keyno, &algo, &n); keyno--; if (keyno < 0 || keyno >= DIM (parm->key_attr)) return 0; parm->key_attr[keyno].algo = algo; if (algo == PUBKEY_ALGO_RSA) parm->key_attr[keyno].nbits = strtoul (line+n+3, NULL, 10); else if (algo == PUBKEY_ALGO_ECDH || algo == PUBKEY_ALGO_ECDSA || algo == PUBKEY_ALGO_EDDSA) parm->key_attr[keyno].curve = openpgp_is_curve_supported (line + n, NULL, NULL); } else if (keywordlen == 12 && !memcmp (keyword, "PRIVATE-DO-", 11) && strchr("1234", keyword[11])) { int no = keyword[11] - '1'; log_assert (no >= 0 && no <= 3); xfree (parm->private_do[no]); parm->private_do[no] = unescape_status_string (line); } return 0; } /* Call the scdaemon to learn about a smartcard */ int agent_scd_learn (struct agent_card_info_s *info, int force) { int rc; struct default_inq_parm_s parm; struct agent_card_info_s dummyinfo; if (!info) info = &dummyinfo; memset (info, 0, sizeof *info); memset (&parm, 0, sizeof parm); rc = start_agent (NULL, 1); if (rc) return rc; parm.ctx = agent_ctx; rc = assuan_transact (agent_ctx, force ? "LEARN --sendinfo --force" : "LEARN --sendinfo", dummy_data_cb, NULL, default_inq_cb, &parm, learn_status_cb, info); /* Also try to get the key attributes. */ if (!rc) agent_scd_getattr ("KEY-ATTR", info); if (info == &dummyinfo) agent_release_card_info (info); return rc; } /* Send an APDU to the current card. On success the status word is stored at R_SW. With HEXAPDU being NULL only a RESET command is send to scd. With HEXAPDU being the string "undefined" the command "SERIALNO undefined" is send to scd. */ gpg_error_t agent_scd_apdu (const char *hexapdu, unsigned int *r_sw) { gpg_error_t err; /* Start the agent but not with the card flag so that we do not autoselect the openpgp application. */ err = start_agent (NULL, 0); if (err) return err; if (!hexapdu) { err = assuan_transact (agent_ctx, "SCD RESET", NULL, NULL, NULL, NULL, NULL, NULL); } else if (!strcmp (hexapdu, "undefined")) { err = assuan_transact (agent_ctx, "SCD SERIALNO undefined", NULL, NULL, NULL, NULL, NULL, NULL); } else { char line[ASSUAN_LINELENGTH]; membuf_t mb; unsigned char *data; size_t datalen; init_membuf (&mb, 256); snprintf (line, DIM(line), "SCD APDU %s", hexapdu); err = assuan_transact (agent_ctx, line, put_membuf_cb, &mb, NULL, NULL, NULL, NULL); if (!err) { data = get_membuf (&mb, &datalen); if (!data) err = gpg_error_from_syserror (); else if (datalen < 2) /* Ooops */ err = gpg_error (GPG_ERR_CARD); else { *r_sw = buf16_to_uint (data+datalen-2); } xfree (data); } } return err; } int agent_keytocard (const char *hexgrip, int keyno, int force, const char *serialno, const char *timestamp) { int rc; char line[ASSUAN_LINELENGTH]; struct default_inq_parm_s parm; memset (&parm, 0, sizeof parm); snprintf (line, DIM(line), "KEYTOCARD %s%s %s OPENPGP.%d %s", force?"--force ": "", hexgrip, serialno, keyno, timestamp); rc = start_agent (NULL, 1); if (rc) return rc; parm.ctx = agent_ctx; rc = assuan_transact (agent_ctx, line, NULL, NULL, default_inq_cb, &parm, NULL, NULL); if (rc) return rc; return rc; } /* Call the agent to retrieve a data object. This function returns the data in the same structure as used by the learn command. It is allowed to update such a structure using this command. */ int agent_scd_getattr (const char *name, struct agent_card_info_s *info) { int rc; char line[ASSUAN_LINELENGTH]; struct default_inq_parm_s parm; memset (&parm, 0, sizeof parm); if (!*name) return gpg_error (GPG_ERR_INV_VALUE); /* We assume that NAME does not need escaping. */ if (12 + strlen (name) > DIM(line)-1) return gpg_error (GPG_ERR_TOO_LARGE); stpcpy (stpcpy (line, "SCD GETATTR "), name); rc = start_agent (NULL, 1); if (rc) return rc; parm.ctx = agent_ctx; rc = assuan_transact (agent_ctx, line, NULL, NULL, default_inq_cb, &parm, learn_status_cb, info); return rc; } /* Send an setattr command to the SCdaemon. SERIALNO is not actually used here but required by gpg 1.4's implementation of this code in cardglue.c. */ int agent_scd_setattr (const char *name, const unsigned char *value, size_t valuelen, const char *serialno) { int rc; char line[ASSUAN_LINELENGTH]; char *p; struct default_inq_parm_s parm; memset (&parm, 0, sizeof parm); (void)serialno; if (!*name || !valuelen) return gpg_error (GPG_ERR_INV_VALUE); /* We assume that NAME does not need escaping. */ if (12 + strlen (name) > DIM(line)-1) return gpg_error (GPG_ERR_TOO_LARGE); p = stpcpy (stpcpy (line, "SCD SETATTR "), name); *p++ = ' '; for (; valuelen; value++, valuelen--) { if (p >= line + DIM(line)-5 ) return gpg_error (GPG_ERR_TOO_LARGE); if (*value < ' ' || *value == '+' || *value == '%') { sprintf (p, "%%%02X", *value); p += 3; } else if (*value == ' ') *p++ = '+'; else *p++ = *value; } *p = 0; rc = start_agent (NULL, 1); if (!rc) { parm.ctx = agent_ctx; rc = assuan_transact (agent_ctx, line, NULL, NULL, default_inq_cb, &parm, NULL, NULL); } status_sc_op_failure (rc); return rc; } /* Handle a CERTDATA inquiry. Note, we only send the data, assuan_transact takes care of flushing and writing the END command. */ static gpg_error_t inq_writecert_parms (void *opaque, const char *line) { int rc; struct writecert_parm_s *parm = opaque; if (has_leading_keyword (line, "CERTDATA")) { rc = assuan_send_data (parm->dflt->ctx, parm->certdata, parm->certdatalen); } else rc = default_inq_cb (parm->dflt, line); return rc; } /* Send a WRITECERT command to the SCdaemon. */ int agent_scd_writecert (const char *certidstr, const unsigned char *certdata, size_t certdatalen) { int rc; char line[ASSUAN_LINELENGTH]; struct writecert_parm_s parms; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); rc = start_agent (NULL, 1); if (rc) return rc; memset (&parms, 0, sizeof parms); snprintf (line, DIM(line), "SCD WRITECERT %s", certidstr); dfltparm.ctx = agent_ctx; parms.dflt = &dfltparm; parms.certdata = certdata; parms.certdatalen = certdatalen; rc = assuan_transact (agent_ctx, line, NULL, NULL, inq_writecert_parms, &parms, NULL, NULL); return rc; } /* Handle a KEYDATA inquiry. Note, we only send the data, assuan_transact takes care of flushing and writing the end */ static gpg_error_t inq_writekey_parms (void *opaque, const char *line) { int rc; struct writekey_parm_s *parm = opaque; if (has_leading_keyword (line, "KEYDATA")) { rc = assuan_send_data (parm->dflt->ctx, parm->keydata, parm->keydatalen); } else rc = default_inq_cb (parm->dflt, line); return rc; } /* Send a WRITEKEY command to the SCdaemon. */ int agent_scd_writekey (int keyno, const char *serialno, const unsigned char *keydata, size_t keydatalen) { int rc; char line[ASSUAN_LINELENGTH]; struct writekey_parm_s parms; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); (void)serialno; rc = start_agent (NULL, 1); if (rc) return rc; memset (&parms, 0, sizeof parms); snprintf (line, DIM(line), "SCD WRITEKEY --force OPENPGP.%d", keyno); dfltparm.ctx = agent_ctx; parms.dflt = &dfltparm; parms.keydata = keydata; parms.keydatalen = keydatalen; rc = assuan_transact (agent_ctx, line, NULL, NULL, inq_writekey_parms, &parms, NULL, NULL); status_sc_op_failure (rc); return rc; } /* Status callback for the SCD GENKEY command. */ static gpg_error_t scd_genkey_cb (void *opaque, const char *line) { u32 *createtime = opaque; const char *keyword = line; int keywordlen; for (keywordlen=0; *line && !spacep (line); line++, keywordlen++) ; while (spacep (line)) line++; if (keywordlen == 14 && !memcmp (keyword,"KEY-CREATED-AT", keywordlen)) { *createtime = (u32)strtoul (line, NULL, 10); } else if (keywordlen == 8 && !memcmp (keyword, "PROGRESS", keywordlen)) { write_status_text (STATUS_PROGRESS, line); } return 0; } /* Send a GENKEY command to the SCdaemon. If *CREATETIME is not 0, the value will be passed to SCDAEMON with --timestamp option so that the key is created with this. Otherwise, timestamp was generated by SCDEAMON. On success, creation time is stored back to CREATETIME. */ int agent_scd_genkey (int keyno, int force, u32 *createtime) { int rc; char line[ASSUAN_LINELENGTH]; gnupg_isotime_t tbuf; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); rc = start_agent (NULL, 1); if (rc) return rc; if (*createtime) epoch2isotime (tbuf, *createtime); else *tbuf = 0; snprintf (line, DIM(line), "SCD GENKEY %s%s %s %d", *tbuf? "--timestamp=":"", tbuf, force? "--force":"", keyno); dfltparm.ctx = agent_ctx; rc = assuan_transact (agent_ctx, line, NULL, NULL, default_inq_cb, &dfltparm, scd_genkey_cb, createtime); status_sc_op_failure (rc); return rc; } /* Return the serial number of the card or an appropriate error. The serial number is returned as a hexstring. */ int agent_scd_serialno (char **r_serialno, const char *demand) { int err; char *serialno = NULL; char line[ASSUAN_LINELENGTH]; err = start_agent (NULL, 1 | FLAG_FOR_CARD_SUPPRESS_ERRORS); if (err) return err; if (!demand) strcpy (line, "SCD SERIALNO"); else snprintf (line, DIM(line), "SCD SERIALNO --demand=%s", demand); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, get_serialno_cb, &serialno); if (err) { xfree (serialno); return err; } *r_serialno = serialno; return 0; } /* Send a READCERT command to the SCdaemon. */ int agent_scd_readcert (const char *certidstr, void **r_buf, size_t *r_buflen) { int rc; char line[ASSUAN_LINELENGTH]; membuf_t data; size_t len; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); *r_buf = NULL; rc = start_agent (NULL, 1); if (rc) return rc; dfltparm.ctx = agent_ctx; init_membuf (&data, 2048); snprintf (line, DIM(line), "SCD READCERT %s", certidstr); rc = assuan_transact (agent_ctx, line, put_membuf_cb, &data, default_inq_cb, &dfltparm, NULL, NULL); if (rc) { xfree (get_membuf (&data, &len)); return rc; } *r_buf = get_membuf (&data, r_buflen); if (!*r_buf) return gpg_error (GPG_ERR_ENOMEM); return 0; } struct card_cardlist_parm_s { int error; strlist_t list; }; /* Callback function for agent_card_cardlist. */ static gpg_error_t card_cardlist_cb (void *opaque, const char *line) { struct card_cardlist_parm_s *parm = opaque; const char *keyword = line; int keywordlen; for (keywordlen=0; *line && !spacep (line); line++, keywordlen++) ; while (spacep (line)) line++; if (keywordlen == 8 && !memcmp (keyword, "SERIALNO", keywordlen)) { const char *s; int n; for (n=0,s=line; hexdigitp (s); s++, n++) ; if (!n || (n&1) || *s) parm->error = gpg_error (GPG_ERR_ASS_PARAMETER); else add_to_strlist (&parm->list, line); } return 0; } /* Return cardlist. */ int agent_scd_cardlist (strlist_t *result) { int err; char line[ASSUAN_LINELENGTH]; struct card_cardlist_parm_s parm; memset (&parm, 0, sizeof parm); *result = NULL; err = start_agent (NULL, 1); if (err) return err; strcpy (line, "SCD GETINFO card_list"); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, card_cardlist_cb, &parm); if (!err && parm.error) err = parm.error; if (!err) *result = parm.list; else free_strlist (parm.list); return 0; } /* Change the PIN of an OpenPGP card or reset the retry counter. CHVNO 1: Change the PIN 2: For v1 cards: Same as 1. For v2 cards: Reset the PIN using the Reset Code. 3: Change the admin PIN 101: Set a new PIN and reset the retry counter 102: For v1 cars: Same as 101. For v2 cards: Set a new Reset Code. SERIALNO is not used. */ int agent_scd_change_pin (int chvno, const char *serialno) { int rc; char line[ASSUAN_LINELENGTH]; const char *reset = ""; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); (void)serialno; if (chvno >= 100) reset = "--reset"; chvno %= 100; rc = start_agent (NULL, 1); if (rc) return rc; dfltparm.ctx = agent_ctx; snprintf (line, DIM(line), "SCD PASSWD %s %d", reset, chvno); rc = assuan_transact (agent_ctx, line, NULL, NULL, default_inq_cb, &dfltparm, NULL, NULL); status_sc_op_failure (rc); return rc; } /* Perform a CHECKPIN operation. SERIALNO should be the serial number of the card - optionally followed by the fingerprint; however the fingerprint is ignored here. */ int agent_scd_checkpin (const char *serialno) { int rc; char line[ASSUAN_LINELENGTH]; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); rc = start_agent (NULL, 1); if (rc) return rc; dfltparm.ctx = agent_ctx; snprintf (line, DIM(line), "SCD CHECKPIN %s", serialno); rc = assuan_transact (agent_ctx, line, NULL, NULL, default_inq_cb, &dfltparm, NULL, NULL); status_sc_op_failure (rc); return rc; } /* Dummy function, only used by the gpg 1.4 implementation. */ void agent_clear_pin_cache (const char *sn) { (void)sn; } /* Note: All strings shall be UTF-8. On success the caller needs to free the string stored at R_PASSPHRASE. On error NULL will be stored at R_PASSPHRASE and an appropriate fpf error code returned. */ gpg_error_t agent_get_passphrase (const char *cache_id, const char *err_msg, const char *prompt, const char *desc_msg, int repeat, int check, char **r_passphrase) { int rc; char line[ASSUAN_LINELENGTH]; char *arg1 = NULL; char *arg2 = NULL; char *arg3 = NULL; char *arg4 = NULL; membuf_t data; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); *r_passphrase = NULL; rc = start_agent (NULL, 0); if (rc) return rc; dfltparm.ctx = agent_ctx; /* Check that the gpg-agent understands the repeat option. */ if (assuan_transact (agent_ctx, "GETINFO cmd_has_option GET_PASSPHRASE repeat", NULL, NULL, NULL, NULL, NULL, NULL)) return gpg_error (GPG_ERR_NOT_SUPPORTED); if (cache_id && *cache_id) if (!(arg1 = percent_plus_escape (cache_id))) goto no_mem; if (err_msg && *err_msg) if (!(arg2 = percent_plus_escape (err_msg))) goto no_mem; if (prompt && *prompt) if (!(arg3 = percent_plus_escape (prompt))) goto no_mem; if (desc_msg && *desc_msg) if (!(arg4 = percent_plus_escape (desc_msg))) goto no_mem; snprintf (line, DIM(line), "GET_PASSPHRASE --data --repeat=%d%s -- %s %s %s %s", repeat, check? " --check --qualitybar":"", arg1? arg1:"X", arg2? arg2:"X", arg3? arg3:"X", arg4? arg4:"X"); xfree (arg1); xfree (arg2); xfree (arg3); xfree (arg4); init_membuf_secure (&data, 64); rc = assuan_transact (agent_ctx, line, put_membuf_cb, &data, default_inq_cb, &dfltparm, NULL, NULL); if (rc) xfree (get_membuf (&data, NULL)); else { put_membuf (&data, "", 1); *r_passphrase = get_membuf (&data, NULL); if (!*r_passphrase) rc = gpg_error_from_syserror (); } return rc; no_mem: rc = gpg_error_from_syserror (); xfree (arg1); xfree (arg2); xfree (arg3); xfree (arg4); return rc; } gpg_error_t agent_clear_passphrase (const char *cache_id) { int rc; char line[ASSUAN_LINELENGTH]; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); if (!cache_id || !*cache_id) return 0; rc = start_agent (NULL, 0); if (rc) return rc; dfltparm.ctx = agent_ctx; snprintf (line, DIM(line), "CLEAR_PASSPHRASE %s", cache_id); return assuan_transact (agent_ctx, line, NULL, NULL, default_inq_cb, &dfltparm, NULL, NULL); } /* Ask the agent to pop up a confirmation dialog with the text DESC and an okay and cancel button. */ gpg_error_t gpg_agent_get_confirmation (const char *desc) { int rc; char *tmp; char line[ASSUAN_LINELENGTH]; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); rc = start_agent (NULL, 0); if (rc) return rc; dfltparm.ctx = agent_ctx; tmp = percent_plus_escape (desc); if (!tmp) return gpg_error_from_syserror (); snprintf (line, DIM(line), "GET_CONFIRMATION %s", tmp); xfree (tmp); rc = assuan_transact (agent_ctx, line, NULL, NULL, default_inq_cb, &dfltparm, NULL, NULL); return rc; } /* Return the S2K iteration count as computed by gpg-agent. */ gpg_error_t agent_get_s2k_count (unsigned long *r_count) { gpg_error_t err; membuf_t data; char *buf; *r_count = 0; err = start_agent (NULL, 0); if (err) return err; init_membuf (&data, 32); err = assuan_transact (agent_ctx, "GETINFO s2k_count", put_membuf_cb, &data, NULL, NULL, NULL, NULL); if (err) xfree (get_membuf (&data, NULL)); else { put_membuf (&data, "", 1); buf = get_membuf (&data, NULL); if (!buf) err = gpg_error_from_syserror (); else { *r_count = strtoul (buf, NULL, 10); xfree (buf); } } return err; } /* Ask the agent whether a secret key for the given public key is available. Returns 0 if available. */ gpg_error_t agent_probe_secret_key (ctrl_t ctrl, PKT_public_key *pk) { gpg_error_t err; char line[ASSUAN_LINELENGTH]; char *hexgrip; err = start_agent (ctrl, 0); if (err) return err; err = hexkeygrip_from_pk (pk, &hexgrip); if (err) return err; snprintf (line, sizeof line, "HAVEKEY %s", hexgrip); xfree (hexgrip); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); return err; } /* Ask the agent whether a secret key is available for any of the keys (primary or sub) in KEYBLOCK. Returns 0 if available. */ gpg_error_t agent_probe_any_secret_key (ctrl_t ctrl, kbnode_t keyblock) { gpg_error_t err; char line[ASSUAN_LINELENGTH]; char *p; kbnode_t kbctx, node; int nkeys; unsigned char grip[20]; err = start_agent (ctrl, 0); if (err) return err; err = gpg_error (GPG_ERR_NO_SECKEY); /* Just in case no key was found in KEYBLOCK. */ p = stpcpy (line, "HAVEKEY"); for (kbctx=NULL, nkeys=0; (node = walk_kbnode (keyblock, &kbctx, 0)); ) if (node->pkt->pkttype == PKT_PUBLIC_KEY || node->pkt->pkttype == PKT_PUBLIC_SUBKEY || node->pkt->pkttype == PKT_SECRET_KEY || node->pkt->pkttype == PKT_SECRET_SUBKEY) { if (nkeys && ((p - line) + 41) > (ASSUAN_LINELENGTH - 2)) { err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); if (err != gpg_err_code (GPG_ERR_NO_SECKEY)) break; /* Seckey available or unexpected error - ready. */ p = stpcpy (line, "HAVEKEY"); nkeys = 0; } err = keygrip_from_pk (node->pkt->pkt.public_key, grip); if (err) return err; *p++ = ' '; bin2hex (grip, 20, p); p += 40; nkeys++; } if (!err && nkeys) err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); return err; } struct keyinfo_data_parm_s { char *serialno; int cleartext; }; static gpg_error_t keyinfo_status_cb (void *opaque, const char *line) { struct keyinfo_data_parm_s *data = opaque; int is_smartcard; char *s; if ((s = has_leading_keyword (line, "KEYINFO")) && data) { /* Parse the arguments: * 0 1 2 3 4 5 * */ char *fields[6]; if (split_fields (s, fields, DIM (fields)) == 6) { is_smartcard = (fields[1][0] == 'T'); if (is_smartcard && !data->serialno && strcmp (fields[2], "-")) data->serialno = xtrystrdup (fields[2]); /* 'P' for protected, 'C' for clear */ data->cleartext = (fields[5][0] == 'C'); } } return 0; } /* Return the serial number for a secret key. If the returned serial number is NULL, the key is not stored on a smartcard. Caller needs to free R_SERIALNO. if r_cleartext is not NULL, the referenced int will be set to 1 if the agent's copy of the key is stored in the clear, or 0 otherwise */ gpg_error_t agent_get_keyinfo (ctrl_t ctrl, const char *hexkeygrip, char **r_serialno, int *r_cleartext) { gpg_error_t err; char line[ASSUAN_LINELENGTH]; struct keyinfo_data_parm_s keyinfo; memset (&keyinfo, 0,sizeof keyinfo); *r_serialno = NULL; err = start_agent (ctrl, 0); if (err) return err; if (!hexkeygrip || strlen (hexkeygrip) != 40) return gpg_error (GPG_ERR_INV_VALUE); snprintf (line, DIM(line), "KEYINFO %s", hexkeygrip); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, keyinfo_status_cb, &keyinfo); if (!err && keyinfo.serialno) { /* Sanity check for bad characters. */ if (strpbrk (keyinfo.serialno, ":\n\r")) err = GPG_ERR_INV_VALUE; } if (err) xfree (keyinfo.serialno); else { *r_serialno = keyinfo.serialno; if (r_cleartext) *r_cleartext = keyinfo.cleartext; } return err; } /* Status callback for agent_import_key, agent_export_key and agent_genkey. */ static gpg_error_t cache_nonce_status_cb (void *opaque, const char *line) { struct cache_nonce_parm_s *parm = opaque; const char *s; if ((s = has_leading_keyword (line, "CACHE_NONCE"))) { if (parm->cache_nonce_addr) { xfree (*parm->cache_nonce_addr); *parm->cache_nonce_addr = xtrystrdup (s); } } else if ((s = has_leading_keyword (line, "PASSWD_NONCE"))) { if (parm->passwd_nonce_addr) { xfree (*parm->passwd_nonce_addr); *parm->passwd_nonce_addr = xtrystrdup (s); } } else if ((s = has_leading_keyword (line, "PROGRESS"))) { if (opt.enable_progress_filter) write_status_text (STATUS_PROGRESS, s); } return 0; } /* Handle a KEYPARMS inquiry. Note, we only send the data, assuan_transact takes care of flushing and writing the end */ static gpg_error_t inq_genkey_parms (void *opaque, const char *line) { struct genkey_parm_s *parm = opaque; gpg_error_t err; if (has_leading_keyword (line, "KEYPARAM")) { err = assuan_send_data (parm->dflt->ctx, parm->keyparms, strlen (parm->keyparms)); } else if (has_leading_keyword (line, "NEWPASSWD") && parm->passphrase) { err = assuan_send_data (parm->dflt->ctx, parm->passphrase, strlen (parm->passphrase)); } else err = default_inq_cb (parm->dflt, line); return err; } /* Call the agent to generate a new key. KEYPARMS is the usual S-expression giving the parameters of the key. gpg-agent passes it gcry_pk_genkey. If NO_PROTECTION is true the agent is advised not to protect the generated key. If NO_PROTECTION is not set and PASSPHRASE is not NULL the agent is requested to protect the key with that passphrase instead of asking for one. */ gpg_error_t agent_genkey (ctrl_t ctrl, char **cache_nonce_addr, char **passwd_nonce_addr, const char *keyparms, int no_protection, const char *passphrase, gcry_sexp_t *r_pubkey) { gpg_error_t err; struct genkey_parm_s gk_parm; struct cache_nonce_parm_s cn_parm; struct default_inq_parm_s dfltparm; membuf_t data; size_t len; unsigned char *buf; char line[ASSUAN_LINELENGTH]; memset (&dfltparm, 0, sizeof dfltparm); dfltparm.ctrl = ctrl; *r_pubkey = NULL; err = start_agent (ctrl, 0); if (err) return err; dfltparm.ctx = agent_ctx; if (passwd_nonce_addr && *passwd_nonce_addr) ; /* A RESET would flush the passwd nonce cache. */ else { err = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; } init_membuf (&data, 1024); gk_parm.dflt = &dfltparm; gk_parm.keyparms = keyparms; gk_parm.passphrase = passphrase; snprintf (line, sizeof line, "GENKEY%s%s%s%s%s", no_protection? " --no-protection" : passphrase ? " --inq-passwd" : /* */ "", passwd_nonce_addr && *passwd_nonce_addr? " --passwd-nonce=":"", passwd_nonce_addr && *passwd_nonce_addr? *passwd_nonce_addr:"", cache_nonce_addr && *cache_nonce_addr? " ":"", cache_nonce_addr && *cache_nonce_addr? *cache_nonce_addr:""); cn_parm.cache_nonce_addr = cache_nonce_addr; cn_parm.passwd_nonce_addr = NULL; err = assuan_transact (agent_ctx, line, put_membuf_cb, &data, inq_genkey_parms, &gk_parm, cache_nonce_status_cb, &cn_parm); if (err) { xfree (get_membuf (&data, &len)); return err; } buf = get_membuf (&data, &len); if (!buf) err = gpg_error_from_syserror (); else { err = gcry_sexp_sscan (r_pubkey, NULL, buf, len); xfree (buf); } return err; } /* Call the agent to read the public key part for a given keygrip. If FROMCARD is true, the key is directly read from the current smartcard. In this case HEXKEYGRIP should be the keyID (e.g. OPENPGP.3). */ gpg_error_t agent_readkey (ctrl_t ctrl, int fromcard, const char *hexkeygrip, unsigned char **r_pubkey) { gpg_error_t err; membuf_t data; size_t len; unsigned char *buf; char line[ASSUAN_LINELENGTH]; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); dfltparm.ctrl = ctrl; *r_pubkey = NULL; err = start_agent (ctrl, 0); if (err) return err; dfltparm.ctx = agent_ctx; err = assuan_transact (agent_ctx, "RESET",NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; snprintf (line, DIM(line), "READKEY %s%s", fromcard? "--card ":"", hexkeygrip); init_membuf (&data, 1024); err = assuan_transact (agent_ctx, line, put_membuf_cb, &data, default_inq_cb, &dfltparm, NULL, NULL); if (err) { xfree (get_membuf (&data, &len)); return err; } buf = get_membuf (&data, &len); if (!buf) return gpg_error_from_syserror (); if (!gcry_sexp_canon_len (buf, len, NULL, NULL)) { xfree (buf); return gpg_error (GPG_ERR_INV_SEXP); } *r_pubkey = buf; return 0; } /* Call the agent to do a sign operation using the key identified by the hex string KEYGRIP. DESC is a description of the key to be displayed if the agent needs to ask for the PIN. DIGEST and DIGESTLEN is the hash value to sign and DIGESTALGO the algorithm id used to compute the digest. If CACHE_NONCE is used the agent is advised to first try a passphrase associated with that nonce. */ gpg_error_t agent_pksign (ctrl_t ctrl, const char *cache_nonce, const char *keygrip, const char *desc, u32 *keyid, u32 *mainkeyid, int pubkey_algo, unsigned char *digest, size_t digestlen, int digestalgo, gcry_sexp_t *r_sigval) { gpg_error_t err; char line[ASSUAN_LINELENGTH]; membuf_t data; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); dfltparm.ctrl = ctrl; dfltparm.keyinfo.keyid = keyid; dfltparm.keyinfo.mainkeyid = mainkeyid; dfltparm.keyinfo.pubkey_algo = pubkey_algo; *r_sigval = NULL; err = start_agent (ctrl, 0); if (err) return err; dfltparm.ctx = agent_ctx; if (digestlen*2 + 50 > DIM(line)) return gpg_error (GPG_ERR_GENERAL); err = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; snprintf (line, DIM(line), "SIGKEY %s", keygrip); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; if (desc) { snprintf (line, DIM(line), "SETKEYDESC %s", desc); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; } snprintf (line, sizeof line, "SETHASH %d ", digestalgo); bin2hex (digest, digestlen, line + strlen (line)); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; init_membuf (&data, 1024); snprintf (line, sizeof line, "PKSIGN%s%s", cache_nonce? " -- ":"", cache_nonce? cache_nonce:""); err = assuan_transact (agent_ctx, line, put_membuf_cb, &data, default_inq_cb, &dfltparm, NULL, NULL); if (err) xfree (get_membuf (&data, NULL)); else { unsigned char *buf; size_t len; buf = get_membuf (&data, &len); if (!buf) err = gpg_error_from_syserror (); else { err = gcry_sexp_sscan (r_sigval, NULL, buf, len); xfree (buf); } } return err; } /* Handle a CIPHERTEXT inquiry. Note, we only send the data, assuan_transact takes care of flushing and writing the END. */ static gpg_error_t inq_ciphertext_cb (void *opaque, const char *line) { struct cipher_parm_s *parm = opaque; int rc; if (has_leading_keyword (line, "CIPHERTEXT")) { assuan_begin_confidential (parm->ctx); rc = assuan_send_data (parm->dflt->ctx, parm->ciphertext, parm->ciphertextlen); assuan_end_confidential (parm->ctx); } else rc = default_inq_cb (parm->dflt, line); return rc; } /* Check whether there is any padding info from the agent. */ static gpg_error_t padding_info_cb (void *opaque, const char *line) { int *r_padding = opaque; const char *s; if ((s=has_leading_keyword (line, "PADDING"))) { *r_padding = atoi (s); } return 0; } /* Call the agent to do a decrypt operation using the key identified by the hex string KEYGRIP and the input data S_CIPHERTEXT. On the success the decoded value is stored verbatim at R_BUF and its length at R_BUF; the callers needs to release it. KEYID, MAINKEYID and PUBKEY_ALGO are used to construct additional promots or status messages. The padding information is stored at R_PADDING with -1 for not known. */ gpg_error_t agent_pkdecrypt (ctrl_t ctrl, const char *keygrip, const char *desc, u32 *keyid, u32 *mainkeyid, int pubkey_algo, gcry_sexp_t s_ciphertext, unsigned char **r_buf, size_t *r_buflen, int *r_padding) { gpg_error_t err; char line[ASSUAN_LINELENGTH]; membuf_t data; size_t n, len; char *p, *buf, *endp; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); dfltparm.ctrl = ctrl; dfltparm.keyinfo.keyid = keyid; dfltparm.keyinfo.mainkeyid = mainkeyid; dfltparm.keyinfo.pubkey_algo = pubkey_algo; if (!keygrip || strlen(keygrip) != 40 || !s_ciphertext || !r_buf || !r_buflen || !r_padding) return gpg_error (GPG_ERR_INV_VALUE); *r_buf = NULL; *r_padding = -1; err = start_agent (ctrl, 0); if (err) return err; dfltparm.ctx = agent_ctx; err = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; snprintf (line, sizeof line, "SETKEY %s", keygrip); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; if (desc) { snprintf (line, DIM(line), "SETKEYDESC %s", desc); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; } init_membuf_secure (&data, 1024); { struct cipher_parm_s parm; parm.dflt = &dfltparm; parm.ctx = agent_ctx; err = make_canon_sexp (s_ciphertext, &parm.ciphertext, &parm.ciphertextlen); if (err) return err; err = assuan_transact (agent_ctx, "PKDECRYPT", put_membuf_cb, &data, inq_ciphertext_cb, &parm, padding_info_cb, r_padding); xfree (parm.ciphertext); } if (err) { xfree (get_membuf (&data, &len)); return err; } put_membuf (&data, "", 1); /* Make sure it is 0 terminated. */ buf = get_membuf (&data, &len); if (!buf) return gpg_error_from_syserror (); log_assert (len); /* (we forced Nul termination.) */ if (*buf != '(') { xfree (buf); return gpg_error (GPG_ERR_INV_SEXP); } if (len < 13 || memcmp (buf, "(5:value", 8) ) /* "(5:valueN:D)\0" */ { xfree (buf); return gpg_error (GPG_ERR_INV_SEXP); } len -= 10; /* Count only the data of the second part. */ p = buf + 8; /* Skip leading parenthesis and the value tag. */ n = strtoul (p, &endp, 10); if (!n || *endp != ':') { xfree (buf); return gpg_error (GPG_ERR_INV_SEXP); } endp++; if (endp-p+n > len) { xfree (buf); return gpg_error (GPG_ERR_INV_SEXP); /* Oops: Inconsistent S-Exp. */ } memmove (buf, endp, n); *r_buflen = n; *r_buf = buf; return 0; } /* Retrieve a key encryption key from the agent. With FOREXPORT true the key shall be used for export, with false for import. On success the new key is stored at R_KEY and its length at R_KEKLEN. */ gpg_error_t agent_keywrap_key (ctrl_t ctrl, int forexport, void **r_kek, size_t *r_keklen) { gpg_error_t err; membuf_t data; size_t len; unsigned char *buf; char line[ASSUAN_LINELENGTH]; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); dfltparm.ctrl = ctrl; *r_kek = NULL; err = start_agent (ctrl, 0); if (err) return err; dfltparm.ctx = agent_ctx; snprintf (line, DIM(line), "KEYWRAP_KEY %s", forexport? "--export":"--import"); init_membuf_secure (&data, 64); err = assuan_transact (agent_ctx, line, put_membuf_cb, &data, default_inq_cb, &dfltparm, NULL, NULL); if (err) { xfree (get_membuf (&data, &len)); return err; } buf = get_membuf (&data, &len); if (!buf) return gpg_error_from_syserror (); *r_kek = buf; *r_keklen = len; return 0; } /* Handle the inquiry for an IMPORT_KEY command. */ static gpg_error_t inq_import_key_parms (void *opaque, const char *line) { struct import_key_parm_s *parm = opaque; gpg_error_t err; if (has_leading_keyword (line, "KEYDATA")) { err = assuan_send_data (parm->dflt->ctx, parm->key, parm->keylen); } else err = default_inq_cb (parm->dflt, line); return err; } /* Call the agent to import a key into the agent. */ gpg_error_t agent_import_key (ctrl_t ctrl, const char *desc, char **cache_nonce_addr, const void *key, size_t keylen, int unattended, int force, u32 *keyid, u32 *mainkeyid, int pubkey_algo) { gpg_error_t err; struct import_key_parm_s parm; struct cache_nonce_parm_s cn_parm; char line[ASSUAN_LINELENGTH]; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); dfltparm.ctrl = ctrl; dfltparm.keyinfo.keyid = keyid; dfltparm.keyinfo.mainkeyid = mainkeyid; dfltparm.keyinfo.pubkey_algo = pubkey_algo; err = start_agent (ctrl, 0); if (err) return err; dfltparm.ctx = agent_ctx; if (desc) { snprintf (line, DIM(line), "SETKEYDESC %s", desc); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; } parm.dflt = &dfltparm; parm.key = key; parm.keylen = keylen; snprintf (line, sizeof line, "IMPORT_KEY%s%s%s%s", unattended? " --unattended":"", force? " --force":"", cache_nonce_addr && *cache_nonce_addr? " ":"", cache_nonce_addr && *cache_nonce_addr? *cache_nonce_addr:""); cn_parm.cache_nonce_addr = cache_nonce_addr; cn_parm.passwd_nonce_addr = NULL; err = assuan_transact (agent_ctx, line, NULL, NULL, inq_import_key_parms, &parm, cache_nonce_status_cb, &cn_parm); return err; } /* Receive a secret key from the agent. HEXKEYGRIP is the hexified keygrip, DESC a prompt to be displayed with the agent's passphrase question (needs to be plus+percent escaped). if OPENPGP_PROTECTED is not zero, ensure that the key material is returned in RFC 4880-compatible passphrased-protected form. If CACHE_NONCE_ADDR is not NULL the agent is advised to first try a passphrase associated with that nonce. On success the key is stored as a canonical S-expression at R_RESULT and R_RESULTLEN. */ gpg_error_t agent_export_key (ctrl_t ctrl, const char *hexkeygrip, const char *desc, int openpgp_protected, char **cache_nonce_addr, unsigned char **r_result, size_t *r_resultlen, u32 *keyid, u32 *mainkeyid, int pubkey_algo) { gpg_error_t err; struct cache_nonce_parm_s cn_parm; membuf_t data; size_t len; unsigned char *buf; char line[ASSUAN_LINELENGTH]; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); dfltparm.ctrl = ctrl; dfltparm.keyinfo.keyid = keyid; dfltparm.keyinfo.mainkeyid = mainkeyid; dfltparm.keyinfo.pubkey_algo = pubkey_algo; *r_result = NULL; err = start_agent (ctrl, 0); if (err) return err; dfltparm.ctx = agent_ctx; if (desc) { snprintf (line, DIM(line), "SETKEYDESC %s", desc); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; } snprintf (line, DIM(line), "EXPORT_KEY %s%s%s %s", openpgp_protected ? "--openpgp ":"", cache_nonce_addr && *cache_nonce_addr? "--cache-nonce=":"", cache_nonce_addr && *cache_nonce_addr? *cache_nonce_addr:"", hexkeygrip); init_membuf_secure (&data, 1024); cn_parm.cache_nonce_addr = cache_nonce_addr; cn_parm.passwd_nonce_addr = NULL; err = assuan_transact (agent_ctx, line, put_membuf_cb, &data, default_inq_cb, &dfltparm, cache_nonce_status_cb, &cn_parm); if (err) { xfree (get_membuf (&data, &len)); return err; } buf = get_membuf (&data, &len); if (!buf) return gpg_error_from_syserror (); *r_result = buf; *r_resultlen = len; return 0; } /* Ask the agent to delete the key identified by HEXKEYGRIP. If DESC is not NULL, display DESC instead of the default description message. If FORCE is true the agent is advised not to ask for confirmation. */ gpg_error_t agent_delete_key (ctrl_t ctrl, const char *hexkeygrip, const char *desc, int force) { gpg_error_t err; char line[ASSUAN_LINELENGTH]; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); dfltparm.ctrl = ctrl; err = start_agent (ctrl, 0); if (err) return err; if (!hexkeygrip || strlen (hexkeygrip) != 40) return gpg_error (GPG_ERR_INV_VALUE); if (desc) { snprintf (line, DIM(line), "SETKEYDESC %s", desc); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; } snprintf (line, DIM(line), "DELETE_KEY%s %s", force? " --force":"", hexkeygrip); err = assuan_transact (agent_ctx, line, NULL, NULL, default_inq_cb, &dfltparm, NULL, NULL); return err; } /* Ask the agent to change the passphrase of the key identified by * HEXKEYGRIP. If DESC is not NULL, display DESC instead of the * default description message. If CACHE_NONCE_ADDR is not NULL the * agent is advised to first try a passphrase associated with that * nonce. If PASSWD_NONCE_ADDR is not NULL the agent will try to use * the passphrase associated with that nonce for the new passphrase. * If VERIFY is true the passphrase is only verified. */ gpg_error_t agent_passwd (ctrl_t ctrl, const char *hexkeygrip, const char *desc, int verify, char **cache_nonce_addr, char **passwd_nonce_addr) { gpg_error_t err; struct cache_nonce_parm_s cn_parm; char line[ASSUAN_LINELENGTH]; struct default_inq_parm_s dfltparm; memset (&dfltparm, 0, sizeof dfltparm); dfltparm.ctrl = ctrl; err = start_agent (ctrl, 0); if (err) return err; dfltparm.ctx = agent_ctx; if (!hexkeygrip || strlen (hexkeygrip) != 40) return gpg_error (GPG_ERR_INV_VALUE); if (desc) { snprintf (line, DIM(line), "SETKEYDESC %s", desc); err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL); if (err) return err; } if (verify) snprintf (line, DIM(line), "PASSWD %s%s --verify %s", cache_nonce_addr && *cache_nonce_addr? "--cache-nonce=":"", cache_nonce_addr && *cache_nonce_addr? *cache_nonce_addr:"", hexkeygrip); else snprintf (line, DIM(line), "PASSWD %s%s %s%s %s", cache_nonce_addr && *cache_nonce_addr? "--cache-nonce=":"", cache_nonce_addr && *cache_nonce_addr? *cache_nonce_addr:"", passwd_nonce_addr && *passwd_nonce_addr? "--passwd-nonce=":"", passwd_nonce_addr && *passwd_nonce_addr? *passwd_nonce_addr:"", hexkeygrip); cn_parm.cache_nonce_addr = cache_nonce_addr; cn_parm.passwd_nonce_addr = passwd_nonce_addr; err = assuan_transact (agent_ctx, line, NULL, NULL, default_inq_cb, &dfltparm, cache_nonce_status_cb, &cn_parm); return err; } /* Return the version reported by gpg-agent. */ gpg_error_t agent_get_version (ctrl_t ctrl, char **r_version) { gpg_error_t err; err = start_agent (ctrl, 0); if (err) return err; err = get_assuan_server_version (agent_ctx, 0, r_version); return err; } diff --git a/g10/call-agent.h b/g10/call-agent.h index 53775c5c8..8de0d13fd 100644 --- a/g10/call-agent.h +++ b/g10/call-agent.h @@ -1,214 +1,215 @@ /* call-agent.h - Divert operations to the agent * Copyright (C) 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 . */ #ifndef GNUPG_G10_CALL_AGENT_H #define GNUPG_G10_CALL_AGENT_H struct agent_card_info_s { int error; /* private. */ char *reader; /* Reader information. */ char *apptype; /* Malloced application type string. */ char *serialno; /* malloced hex string. */ char *disp_name; /* malloced. */ char *disp_lang; /* malloced. */ int disp_sex; /* 0 = unspecified, 1 = male, 2 = female */ char *pubkey_url; /* malloced. */ char *login_data; /* malloced. */ char *private_do[4]; /* malloced. */ char cafpr1valid; char cafpr2valid; char cafpr3valid; char cafpr1[20]; char cafpr2[20]; char cafpr3[20]; char fpr1valid; char fpr2valid; char fpr3valid; char fpr1[20]; char fpr2[20]; char fpr3[20]; u32 fpr1time; u32 fpr2time; u32 fpr3time; char grp1[20]; /* The keygrip for OPENPGP.1 */ char grp2[20]; /* The keygrip for OPENPGP.2 */ char grp3[20]; /* The keygrip for OPENPGP.3 */ unsigned long sig_counter; int chv1_cached; /* True if a PIN is not required for each signing. Note that the gpg-agent might cache it anyway. */ int is_v2; /* True if this is a v2 card. */ int chvmaxlen[3]; /* Maximum allowed length of a CHV. */ int chvretry[3]; /* Allowed retries for the CHV; 0 = blocked. */ struct { /* Array with key attributes. */ int algo; /* Algorithm identifier. */ union { unsigned int nbits; /* Supported keysize. */ const char *curve; /* Name of curve. */ }; } key_attr[3]; struct { unsigned int ki:1; /* Key import available. */ unsigned int aac:1; /* Algorithm attributes are changeable. */ + unsigned int kdf:1; /* KDF object to support PIN hashing available. */ } extcap; unsigned int status_indicator; }; /* Release the card info structure. */ void agent_release_card_info (struct agent_card_info_s *info); /* Return card info. */ int agent_scd_learn (struct agent_card_info_s *info, int force); /* Return list of cards. */ int agent_scd_cardlist (strlist_t *result); /* Return the serial number, possibly select by DEMAND. */ int agent_scd_serialno (char **r_serialno, const char *demand); /* Send an APDU to the card. */ gpg_error_t agent_scd_apdu (const char *hexapdu, unsigned int *r_sw); /* Update INFO with the attribute NAME. */ int agent_scd_getattr (const char *name, struct agent_card_info_s *info); /* Send the KEYTOCARD command. */ int agent_keytocard (const char *hexgrip, int keyno, int force, const char *serialno, const char *timestamp); /* Send a SETATTR command to the SCdaemon. */ int agent_scd_setattr (const char *name, const unsigned char *value, size_t valuelen, const char *serialno); /* Send a WRITECERT command to the SCdaemon. */ int agent_scd_writecert (const char *certidstr, const unsigned char *certdata, size_t certdatalen); /* Send a WRITEKEY command to the SCdaemon. */ int agent_scd_writekey (int keyno, const char *serialno, const unsigned char *keydata, size_t keydatalen); /* Send a GENKEY command to the SCdaemon. */ int agent_scd_genkey (int keyno, int force, u32 *createtime); /* Send a READKEY command to the SCdaemon. */ int agent_scd_readcert (const char *certidstr, void **r_buf, size_t *r_buflen); /* Change the PIN of an OpenPGP card or reset the retry counter. */ int agent_scd_change_pin (int chvno, const char *serialno); /* Send the CHECKPIN command to the SCdaemon. */ int agent_scd_checkpin (const char *serialno); /* Dummy function, only implemented by gpg 1.4. */ void agent_clear_pin_cache (const char *sn); /* Send the GET_PASSPHRASE command to the agent. */ gpg_error_t agent_get_passphrase (const char *cache_id, const char *err_msg, const char *prompt, const char *desc_msg, int repeat, int check, char **r_passphrase); /* Send the CLEAR_PASSPHRASE command to the agent. */ gpg_error_t agent_clear_passphrase (const char *cache_id); /* Present the prompt DESC and ask the user to confirm. */ gpg_error_t gpg_agent_get_confirmation (const char *desc); /* Return the S2K iteration count as computed by gpg-agent. */ gpg_error_t agent_get_s2k_count (unsigned long *r_count); /* Check whether a secret key for public key PK is available. Returns 0 if the secret key is available. */ gpg_error_t agent_probe_secret_key (ctrl_t ctrl, PKT_public_key *pk); /* Ask the agent whether a secret key is availabale for any of the keys (primary or sub) in KEYBLOCK. Returns 0 if available. */ gpg_error_t agent_probe_any_secret_key (ctrl_t ctrl, kbnode_t keyblock); /* Return infos about the secret key with HEXKEYGRIP. */ gpg_error_t agent_get_keyinfo (ctrl_t ctrl, const char *hexkeygrip, char **r_serialno, int *r_cleartext); /* Generate a new key. */ gpg_error_t agent_genkey (ctrl_t ctrl, char **cache_nonce_addr, char **passwd_nonce_addr, const char *keyparms, int no_protection, const char *passphrase, gcry_sexp_t *r_pubkey); /* Read a public key. */ gpg_error_t agent_readkey (ctrl_t ctrl, int fromcard, const char *hexkeygrip, unsigned char **r_pubkey); /* Create a signature. */ gpg_error_t agent_pksign (ctrl_t ctrl, const char *cache_nonce, const char *hexkeygrip, const char *desc, u32 *keyid, u32 *mainkeyid, int pubkey_algo, unsigned char *digest, size_t digestlen, int digestalgo, gcry_sexp_t *r_sigval); /* Decrypt a ciphertext. */ gpg_error_t agent_pkdecrypt (ctrl_t ctrl, const char *keygrip, const char *desc, u32 *keyid, u32 *mainkeyid, int pubkey_algo, gcry_sexp_t s_ciphertext, unsigned char **r_buf, size_t *r_buflen, int *r_padding); /* Retrieve a key encryption key. */ gpg_error_t agent_keywrap_key (ctrl_t ctrl, int forexport, void **r_kek, size_t *r_keklen); /* Send a key to the agent. */ gpg_error_t agent_import_key (ctrl_t ctrl, const char *desc, char **cache_nonce_addr, const void *key, size_t keylen, int unattended, int force, u32 *keyid, u32 *mainkeyid, int pubkey_algo); /* Receive a key from the agent. */ gpg_error_t agent_export_key (ctrl_t ctrl, const char *keygrip, const char *desc, int openpgp_protected, char **cache_nonce_addr, unsigned char **r_result, size_t *r_resultlen, u32 *keyid, u32 *mainkeyid, int pubkey_algo); /* Delete a key from the agent. */ gpg_error_t agent_delete_key (ctrl_t ctrl, const char *hexkeygrip, const char *desc, int force); /* Change the passphrase of a key. */ gpg_error_t agent_passwd (ctrl_t ctrl, const char *hexkeygrip, const char *desc, int verify, char **cache_nonce_addr, char **passwd_nonce_addr); /* Get the version reported by gpg-agent. */ gpg_error_t agent_get_version (ctrl_t ctrl, char **r_version); #endif /*GNUPG_G10_CALL_AGENT_H*/ diff --git a/g10/card-util.c b/g10/card-util.c index 7616dbb5b..d78e9bd8e 100644 --- a/g10/card-util.c +++ b/g10/card-util.c @@ -1,2241 +1,2344 @@ /* card-util.c - Utility functions for the OpenPGP card. * Copyright (C) 2003-2005, 2009 Free Software Foundation, Inc. * Copyright (C) 2003-2005, 2009 Werner Koch * * 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 . */ #include #include #include #include #include #ifdef HAVE_LIBREADLINE # define GNUPG_LIBREADLINE_H_INCLUDED # include #endif /*HAVE_LIBREADLINE*/ #if GNUPG_MAJOR_VERSION != 1 # include "gpg.h" #endif /*GNUPG_MAJOR_VERSION != 1*/ #include "../common/util.h" #include "../common/i18n.h" #include "../common/ttyio.h" #include "../common/status.h" #include "options.h" #include "main.h" #include "keyserver-internal.h" #if GNUPG_MAJOR_VERSION == 1 # include "cardglue.h" #else /*GNUPG_MAJOR_VERSION!=1*/ # include "call-agent.h" #endif /*GNUPG_MAJOR_VERSION!=1*/ #define CONTROL_D ('D' - 'A' + 1) static void write_sc_op_status (gpg_error_t err) { switch (gpg_err_code (err)) { case 0: write_status (STATUS_SC_OP_SUCCESS); break; #if GNUPG_MAJOR_VERSION != 1 case GPG_ERR_CANCELED: case GPG_ERR_FULLY_CANCELED: write_status_text (STATUS_SC_OP_FAILURE, "1"); break; case GPG_ERR_BAD_PIN: write_status_text (STATUS_SC_OP_FAILURE, "2"); break; default: write_status (STATUS_SC_OP_FAILURE); break; #endif /* GNUPG_MAJOR_VERSION != 1 */ } } /* Change the PIN of an OpenPGP card. This is an interactive function. */ void change_pin (int unblock_v2, int allow_admin) { struct agent_card_info_s info; int rc; rc = agent_scd_learn (&info, 0); if (rc) { log_error (_("OpenPGP card not available: %s\n"), gpg_strerror (rc)); return; } log_info (_("OpenPGP card no. %s detected\n"), info.serialno? info.serialno : "[none]"); agent_clear_pin_cache (info.serialno); if (opt.batch) { agent_release_card_info (&info); log_error (_("can't do this in batch mode\n")); return; } if (unblock_v2) { if (!info.is_v2) log_error (_("This command is only available for version 2 cards\n")); else if (!info.chvretry[1]) log_error (_("Reset Code not or not anymore available\n")); else { rc = agent_scd_change_pin (2, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error changing the PIN: %s\n", gpg_strerror (rc)); else tty_printf ("PIN changed.\n"); } } else if (!allow_admin) { rc = agent_scd_change_pin (1, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error changing the PIN: %s\n", gpg_strerror (rc)); else tty_printf ("PIN changed.\n"); } else for (;;) { char *answer; tty_printf ("\n"); tty_printf ("1 - change PIN\n" "2 - unblock PIN\n" "3 - change Admin PIN\n" "4 - set the Reset Code\n" "Q - quit\n"); tty_printf ("\n"); answer = cpr_get("cardutil.change_pin.menu",_("Your selection? ")); cpr_kill_prompt(); if (strlen (answer) != 1) continue; if (*answer == '1') { /* Change PIN. */ rc = agent_scd_change_pin (1, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error changing the PIN: %s\n", gpg_strerror (rc)); else tty_printf ("PIN changed.\n"); } else if (*answer == '2') { /* Unblock PIN. */ rc = agent_scd_change_pin (101, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error unblocking the PIN: %s\n", gpg_strerror (rc)); else tty_printf ("PIN unblocked and new PIN set.\n"); } else if (*answer == '3') { /* Change Admin PIN. */ rc = agent_scd_change_pin (3, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error changing the PIN: %s\n", gpg_strerror (rc)); else tty_printf ("PIN changed.\n"); } else if (*answer == '4') { /* Set a new Reset Code. */ rc = agent_scd_change_pin (102, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error setting the Reset Code: %s\n", gpg_strerror (rc)); else tty_printf ("Reset Code set.\n"); } else if (*answer == 'q' || *answer == 'Q') { break; } } agent_release_card_info (&info); } static const char * get_manufacturer (unsigned int no) { /* Note: Make sure that there is no colon or linefeed in the string. */ switch (no) { case 0x0001: return "PPC Card Systems"; case 0x0002: return "Prism"; case 0x0003: return "OpenFortress"; case 0x0004: return "Wewid"; case 0x0005: return "ZeitControl"; case 0x0006: return "Yubico"; case 0x0007: return "OpenKMS"; case 0x0008: return "LogoEmail"; case 0x0009: return "Fidesmo"; case 0x000A: return "Dangerous Things"; case 0x002A: return "Magrathea"; case 0x0042: return "GnuPG e.V."; case 0x1337: return "Warsaw Hackerspace"; case 0x2342: return "warpzone"; /* hackerspace Muenster. */ case 0xBD0E: return "Paranoidlabs"; case 0xF517: return "FSIJ"; /* 0x0000 and 0xFFFF are defined as test cards per spec, 0xFF00 to 0xFFFE are assigned for use with randomly created serial numbers. */ case 0x0000: case 0xffff: return "test card"; default: return (no & 0xff00) == 0xff00? "unmanaged S/N range":"unknown"; } } static void print_sha1_fpr (estream_t fp, const unsigned char *fpr) { int i; if (fpr) { for (i=0; i < 20 ; i+=2, fpr += 2 ) { if (i == 10 ) tty_fprintf (fp, " "); tty_fprintf (fp, " %02X%02X", *fpr, fpr[1]); } } else tty_fprintf (fp, " [none]"); tty_fprintf (fp, "\n"); } static void print_sha1_fpr_colon (estream_t fp, const unsigned char *fpr) { int i; if (fpr) { for (i=0; i < 20 ; i++, fpr++) es_fprintf (fp, "%02X", *fpr); } es_putc (':', fp); } static void print_keygrip (estream_t fp, const unsigned char *grp) { int i; if (opt.with_keygrip) { tty_fprintf (fp, " keygrip ....: "); for (i=0; i < 20 ; i++, grp++) es_fprintf (fp, "%02X", *grp); tty_fprintf (fp, "\n"); } } static void print_name (estream_t fp, const char *text, const char *name) { tty_fprintf (fp, "%s", text); /* FIXME: tty_printf_utf8_string2 eats everything after and including an @ - e.g. when printing an url. */ if (name && *name) { if (fp) print_utf8_buffer2 (fp, name, strlen (name), '\n'); else tty_print_utf8_string2 (NULL, name, strlen (name), 0); } else tty_fprintf (fp, _("[not set]")); tty_fprintf (fp, "\n"); } static void print_isoname (estream_t fp, const char *text, const char *tag, const char *name) { if (opt.with_colons) es_fprintf (fp, "%s:", tag); else tty_fprintf (fp, "%s", text); if (name && *name) { char *p, *given, *buf = xstrdup (name); given = strstr (buf, "<<"); for (p=buf; *p; p++) if (*p == '<') *p = ' '; if (given && given[2]) { *given = 0; given += 2; if (opt.with_colons) es_write_sanitized (fp, given, strlen (given), ":", NULL); else if (fp) print_utf8_buffer2 (fp, given, strlen (given), '\n'); else tty_print_utf8_string2 (NULL, given, strlen (given), 0); if (opt.with_colons) es_putc (':', fp); else if (*buf) tty_fprintf (fp, " "); } if (opt.with_colons) es_write_sanitized (fp, buf, strlen (buf), ":", NULL); else if (fp) print_utf8_buffer2 (fp, buf, strlen (buf), '\n'); else tty_print_utf8_string2 (NULL, buf, strlen (buf), 0); xfree (buf); } else { if (opt.with_colons) es_putc (':', fp); else tty_fprintf (fp, _("[not set]")); } if (opt.with_colons) es_fputs (":\n", fp); else tty_fprintf (fp, "\n"); } /* Return true if the SHA1 fingerprint FPR consists only of zeroes. */ static int fpr_is_zero (const char *fpr) { int i; for (i=0; i < 20 && !fpr[i]; i++) ; return (i == 20); } /* Return true if the SHA1 fingerprint FPR consists only of 0xFF. */ static int fpr_is_ff (const char *fpr) { int i; for (i=0; i < 20 && fpr[i] == '\xff'; i++) ; return (i == 20); } /* Print all available information about the current card. */ static void current_card_status (ctrl_t ctrl, estream_t fp, char *serialno, size_t serialnobuflen) { struct agent_card_info_s info; PKT_public_key *pk = xcalloc (1, sizeof *pk); kbnode_t keyblock = NULL; int rc; unsigned int uval; const unsigned char *thefpr; int i; if (serialno && serialnobuflen) *serialno = 0; rc = agent_scd_learn (&info, 0); if (rc) { if (opt.with_colons) es_fputs ("AID:::\n", fp); log_error (_("OpenPGP card not available: %s\n"), gpg_strerror (rc)); xfree (pk); return; } if (opt.with_colons) es_fprintf (fp, "Reader:%s:", info.reader? info.reader : ""); else tty_fprintf (fp, "Reader ...........: %s\n", info.reader? info.reader : "[none]"); if (opt.with_colons) es_fprintf (fp, "AID:%s:", info.serialno? info.serialno : ""); else tty_fprintf (fp, "Application ID ...: %s\n", info.serialno? info.serialno : "[none]"); if (!info.serialno || strncmp (info.serialno, "D27600012401", 12) || strlen (info.serialno) != 32 ) { if (info.apptype && !strcmp (info.apptype, "NKS")) { if (opt.with_colons) es_fputs ("netkey-card:\n", fp); log_info ("this is a NetKey card\n"); } else if (info.apptype && !strcmp (info.apptype, "DINSIG")) { if (opt.with_colons) es_fputs ("dinsig-card:\n", fp); log_info ("this is a DINSIG compliant card\n"); } else if (info.apptype && !strcmp (info.apptype, "P15")) { if (opt.with_colons) es_fputs ("pkcs15-card:\n", fp); log_info ("this is a PKCS#15 compliant card\n"); } else if (info.apptype && !strcmp (info.apptype, "GELDKARTE")) { if (opt.with_colons) es_fputs ("geldkarte-card:\n", fp); log_info ("this is a Geldkarte compliant card\n"); } else { if (opt.with_colons) es_fputs ("unknown:\n", fp); } log_info ("not an OpenPGP card\n"); agent_release_card_info (&info); xfree (pk); return; } if (!serialno) ; else if (strlen (info.serialno)+1 > serialnobuflen) log_error ("serial number longer than expected\n"); else strcpy (serialno, info.serialno); if (opt.with_colons) es_fputs ("openpgp-card:\n", fp); if (opt.with_colons) { es_fprintf (fp, "version:%.4s:\n", info.serialno+12); uval = xtoi_2(info.serialno+16)*256 + xtoi_2 (info.serialno+18); es_fprintf (fp, "vendor:%04x:%s:\n", uval, get_manufacturer (uval)); es_fprintf (fp, "serial:%.8s:\n", info.serialno+20); print_isoname (fp, "Name of cardholder: ", "name", info.disp_name); es_fputs ("lang:", fp); if (info.disp_lang) es_write_sanitized (fp, info.disp_lang, strlen (info.disp_lang), ":", NULL); es_fputs (":\n", fp); es_fprintf (fp, "sex:%c:\n", (info.disp_sex == 1? 'm': info.disp_sex == 2? 'f' : 'u')); es_fputs ("url:", fp); if (info.pubkey_url) es_write_sanitized (fp, info.pubkey_url, strlen (info.pubkey_url), ":", NULL); es_fputs (":\n", fp); es_fputs ("login:", fp); if (info.login_data) es_write_sanitized (fp, info.login_data, strlen (info.login_data), ":", NULL); es_fputs (":\n", fp); es_fprintf (fp, "forcepin:%d:::\n", !info.chv1_cached); for (i=0; i < DIM (info.key_attr); i++) if (info.key_attr[i].algo == PUBKEY_ALGO_RSA) es_fprintf (fp, "keyattr:%d:%d:%u:\n", i+1, info.key_attr[i].algo, info.key_attr[i].nbits); else if (info.key_attr[i].algo == PUBKEY_ALGO_ECDH || info.key_attr[i].algo == PUBKEY_ALGO_ECDSA || info.key_attr[i].algo == PUBKEY_ALGO_EDDSA) es_fprintf (fp, "keyattr:%d:%d:%s:\n", i+1, info.key_attr[i].algo, info.key_attr[i].curve); es_fprintf (fp, "maxpinlen:%d:%d:%d:\n", info.chvmaxlen[0], info.chvmaxlen[1], info.chvmaxlen[2]); es_fprintf (fp, "pinretry:%d:%d:%d:\n", info.chvretry[0], info.chvretry[1], info.chvretry[2]); es_fprintf (fp, "sigcount:%lu:::\n", info.sig_counter); for (i=0; i < 4; i++) { if (info.private_do[i]) { es_fprintf (fp, "private_do:%d:", i+1); es_write_sanitized (fp, info.private_do[i], strlen (info.private_do[i]), ":", NULL); es_fputs (":\n", fp); } } es_fputs ("cafpr:", fp); print_sha1_fpr_colon (fp, info.cafpr1valid? info.cafpr1:NULL); print_sha1_fpr_colon (fp, info.cafpr2valid? info.cafpr2:NULL); print_sha1_fpr_colon (fp, info.cafpr3valid? info.cafpr3:NULL); es_putc ('\n', fp); es_fputs ("fpr:", fp); print_sha1_fpr_colon (fp, info.fpr1valid? info.fpr1:NULL); print_sha1_fpr_colon (fp, info.fpr2valid? info.fpr2:NULL); print_sha1_fpr_colon (fp, info.fpr3valid? info.fpr3:NULL); es_putc ('\n', fp); es_fprintf (fp, "fprtime:%lu:%lu:%lu:\n", (unsigned long)info.fpr1time, (unsigned long)info.fpr2time, (unsigned long)info.fpr3time); es_fputs ("grp:", fp); print_sha1_fpr_colon (fp, info.grp1); print_sha1_fpr_colon (fp, info.grp2); print_sha1_fpr_colon (fp, info.grp3); es_putc ('\n', fp); } else { tty_fprintf (fp, "Version ..........: %.1s%c.%.1s%c\n", info.serialno[12] == '0'?"":info.serialno+12, info.serialno[13], info.serialno[14] == '0'?"":info.serialno+14, info.serialno[15]); tty_fprintf (fp, "Manufacturer .....: %s\n", get_manufacturer (xtoi_2(info.serialno+16)*256 + xtoi_2 (info.serialno+18))); tty_fprintf (fp, "Serial number ....: %.8s\n", info.serialno+20); print_isoname (fp, "Name of cardholder: ", "name", info.disp_name); print_name (fp, "Language prefs ...: ", info.disp_lang); tty_fprintf (fp, "Sex ..............: %s\n", info.disp_sex == 1? _("male"): info.disp_sex == 2? _("female") : _("unspecified")); print_name (fp, "URL of public key : ", info.pubkey_url); print_name (fp, "Login data .......: ", info.login_data); if (info.private_do[0]) print_name (fp, "Private DO 1 .....: ", info.private_do[0]); if (info.private_do[1]) print_name (fp, "Private DO 2 .....: ", info.private_do[1]); if (info.private_do[2]) print_name (fp, "Private DO 3 .....: ", info.private_do[2]); if (info.private_do[3]) print_name (fp, "Private DO 4 .....: ", info.private_do[3]); if (info.cafpr1valid) { tty_fprintf (fp, "CA fingerprint %d .:", 1); print_sha1_fpr (fp, info.cafpr1); } if (info.cafpr2valid) { tty_fprintf (fp, "CA fingerprint %d .:", 2); print_sha1_fpr (fp, info.cafpr2); } if (info.cafpr3valid) { tty_fprintf (fp, "CA fingerprint %d .:", 3); print_sha1_fpr (fp, info.cafpr3); } tty_fprintf (fp, "Signature PIN ....: %s\n", info.chv1_cached? _("not forced"): _("forced")); if (info.key_attr[0].algo) { tty_fprintf (fp, "Key attributes ...:"); for (i=0; i < DIM (info.key_attr); i++) if (info.key_attr[i].algo == PUBKEY_ALGO_RSA) tty_fprintf (fp, " rsa%u", info.key_attr[i].nbits); else if (info.key_attr[i].algo == PUBKEY_ALGO_ECDH || info.key_attr[i].algo == PUBKEY_ALGO_ECDSA || info.key_attr[i].algo == PUBKEY_ALGO_EDDSA) { const char *curve_for_print = "?"; if (info.key_attr[i].curve) { const char *oid; oid = openpgp_curve_to_oid (info.key_attr[i].curve, NULL); if (oid) curve_for_print = openpgp_oid_to_curve (oid, 0); } tty_fprintf (fp, " %s", curve_for_print); } tty_fprintf (fp, "\n"); } tty_fprintf (fp, "Max. PIN lengths .: %d %d %d\n", info.chvmaxlen[0], info.chvmaxlen[1], info.chvmaxlen[2]); tty_fprintf (fp, "PIN retry counter : %d %d %d\n", info.chvretry[0], info.chvretry[1], info.chvretry[2]); tty_fprintf (fp, "Signature counter : %lu\n", info.sig_counter); tty_fprintf (fp, "Signature key ....:"); print_sha1_fpr (fp, info.fpr1valid? info.fpr1:NULL); if (info.fpr1valid && info.fpr1time) { tty_fprintf (fp, " created ....: %s\n", isotimestamp (info.fpr1time)); print_keygrip (fp, info.grp1); } tty_fprintf (fp, "Encryption key....:"); print_sha1_fpr (fp, info.fpr2valid? info.fpr2:NULL); if (info.fpr2valid && info.fpr2time) { tty_fprintf (fp, " created ....: %s\n", isotimestamp (info.fpr2time)); print_keygrip (fp, info.grp2); } tty_fprintf (fp, "Authentication key:"); print_sha1_fpr (fp, info.fpr3valid? info.fpr3:NULL); if (info.fpr3valid && info.fpr3time) { tty_fprintf (fp, " created ....: %s\n", isotimestamp (info.fpr3time)); print_keygrip (fp, info.grp2); } tty_fprintf (fp, "General key info..: "); thefpr = (info.fpr1valid? info.fpr1 : info.fpr2valid? info.fpr2 : info.fpr3valid? info.fpr3 : NULL); /* If the fingerprint is all 0xff, the key has no asssociated OpenPGP certificate. */ if ( thefpr && !fpr_is_ff (thefpr) && !get_pubkey_byfprint (ctrl, pk, &keyblock, thefpr, 20)) { print_pubkey_info (ctrl, fp, pk); if (keyblock) print_card_key_info (fp, keyblock); } else tty_fprintf (fp, "[none]\n"); } release_kbnode (keyblock); free_public_key (pk); agent_release_card_info (&info); } /* Print all available information for specific card with SERIALNO. Print all available information for current card when SERIALNO is NULL. Or print for all cards when SERIALNO is "all". */ void card_status (ctrl_t ctrl, estream_t fp, const char *serialno) { int err; strlist_t card_list, sl; char *serialno0; int all_cards = 0; if (serialno == NULL) { current_card_status (ctrl, fp, NULL, 0); return; } if (!strcmp (serialno, "all")) all_cards = 1; err = agent_scd_serialno (&serialno0, NULL); if (err) { if (gpg_err_code (err) != GPG_ERR_ENODEV && opt.verbose) log_info (_("error getting serial number of card: %s\n"), gpg_strerror (err)); /* Nothing available. */ return; } err = agent_scd_cardlist (&card_list); for (sl = card_list; sl; sl = sl->next) { char *serialno1; if (!all_cards && strcmp (serialno, sl->d)) continue; err = agent_scd_serialno (&serialno1, sl->d); if (err) { if (opt.verbose) log_info (_("error getting serial number of card: %s\n"), gpg_strerror (err)); continue; } current_card_status (ctrl, fp, NULL, 0); xfree (serialno1); if (!all_cards) goto leave; } /* Select the original card again. */ err = agent_scd_serialno (&serialno0, serialno0); leave: xfree (serialno0); free_strlist (card_list); } static char * get_one_name (const char *prompt1, const char *prompt2) { char *name; int i; for (;;) { name = cpr_get (prompt1, prompt2); if (!name) return NULL; trim_spaces (name); cpr_kill_prompt (); for (i=0; name[i] && name[i] >= ' ' && name[i] <= 126; i++) ; /* The name must be in Latin-1 and not UTF-8 - lacking the code to ensure this we restrict it to ASCII. */ if (name[i]) tty_printf (_("Error: Only plain ASCII is currently allowed.\n")); else if (strchr (name, '<')) tty_printf (_("Error: The \"<\" character may not be used.\n")); else if (strstr (name, " ")) tty_printf (_("Error: Double spaces are not allowed.\n")); else return name; xfree (name); } } static int change_name (void) { char *surname = NULL, *givenname = NULL; char *isoname, *p; int rc; surname = get_one_name ("keygen.smartcard.surname", _("Cardholder's surname: ")); givenname = get_one_name ("keygen.smartcard.givenname", _("Cardholder's given name: ")); if (!surname || !givenname || (!*surname && !*givenname)) { xfree (surname); xfree (givenname); return -1; /*canceled*/ } isoname = xmalloc ( strlen (surname) + 2 + strlen (givenname) + 1); strcpy (stpcpy (stpcpy (isoname, surname), "<<"), givenname); xfree (surname); xfree (givenname); for (p=isoname; *p; p++) if (*p == ' ') *p = '<'; if (strlen (isoname) > 39 ) { tty_printf (_("Error: Combined name too long " "(limit is %d characters).\n"), 39); xfree (isoname); return -1; } rc = agent_scd_setattr ("DISP-NAME", isoname, strlen (isoname), NULL ); if (rc) log_error ("error setting Name: %s\n", gpg_strerror (rc)); xfree (isoname); return rc; } static int change_url (void) { char *url; int rc; url = cpr_get ("cardedit.change_url", _("URL to retrieve public key: ")); if (!url) return -1; trim_spaces (url); cpr_kill_prompt (); rc = agent_scd_setattr ("PUBKEY-URL", url, strlen (url), NULL ); if (rc) log_error ("error setting URL: %s\n", gpg_strerror (rc)); xfree (url); write_sc_op_status (rc); return rc; } /* Fetch the key from the URL given on the card or try to get it from the default keyserver. */ static int fetch_url (ctrl_t ctrl) { int rc; struct agent_card_info_s info; memset(&info,0,sizeof(info)); rc=agent_scd_getattr("PUBKEY-URL",&info); if(rc) log_error("error retrieving URL from card: %s\n",gpg_strerror(rc)); else { rc=agent_scd_getattr("KEY-FPR",&info); if(rc) log_error("error retrieving key fingerprint from card: %s\n", gpg_strerror(rc)); else if (info.pubkey_url && *info.pubkey_url) { strlist_t sl = NULL; add_to_strlist (&sl, info.pubkey_url); rc = keyserver_fetch (ctrl, sl, KEYORG_URL); free_strlist (sl); } else if (info.fpr1valid) { rc = keyserver_import_fprint (ctrl, info.fpr1, 20, opt.keyserver, 0); } } return rc; } #define MAX_GET_DATA_FROM_FILE 16384 /* Read data from file FNAME up to MAX_GET_DATA_FROM_FILE characters. On error return -1 and store NULL at R_BUFFER; on success return the number of bytes read and store the address of a newly allocated buffer at R_BUFFER. */ static int get_data_from_file (const char *fname, char **r_buffer) { estream_t fp; char *data; int n; *r_buffer = NULL; fp = es_fopen (fname, "rb"); #if GNUPG_MAJOR_VERSION == 1 if (fp && is_secured_file (fileno (fp))) { fclose (fp); fp = NULL; errno = EPERM; } #endif if (!fp) { tty_printf (_("can't open '%s': %s\n"), fname, strerror (errno)); return -1; } data = xtrymalloc (MAX_GET_DATA_FROM_FILE); if (!data) { tty_printf (_("error allocating enough memory: %s\n"), strerror (errno)); es_fclose (fp); return -1; } n = es_fread (data, 1, MAX_GET_DATA_FROM_FILE, fp); es_fclose (fp); if (n < 0) { tty_printf (_("error reading '%s': %s\n"), fname, strerror (errno)); xfree (data); return -1; } *r_buffer = data; return n; } /* Write LENGTH bytes from BUFFER to file FNAME. Return 0 on success. */ static int put_data_to_file (const char *fname, const void *buffer, size_t length) { estream_t fp; fp = es_fopen (fname, "wb"); #if GNUPG_MAJOR_VERSION == 1 if (fp && is_secured_file (fileno (fp))) { fclose (fp); fp = NULL; errno = EPERM; } #endif if (!fp) { tty_printf (_("can't create '%s': %s\n"), fname, strerror (errno)); return -1; } if (length && es_fwrite (buffer, length, 1, fp) != 1) { tty_printf (_("error writing '%s': %s\n"), fname, strerror (errno)); es_fclose (fp); return -1; } es_fclose (fp); return 0; } static int change_login (const char *args) { char *data; int n; int rc; if (args && *args == '<') /* Read it from a file */ { for (args++; spacep (args); args++) ; n = get_data_from_file (args, &data); if (n < 0) return -1; } else { data = cpr_get ("cardedit.change_login", _("Login data (account name): ")); if (!data) return -1; trim_spaces (data); cpr_kill_prompt (); n = strlen (data); } rc = agent_scd_setattr ("LOGIN-DATA", data, n, NULL ); if (rc) log_error ("error setting login data: %s\n", gpg_strerror (rc)); xfree (data); write_sc_op_status (rc); return rc; } static int change_private_do (const char *args, int nr) { char do_name[] = "PRIVATE-DO-X"; char *data; int n; int rc; log_assert (nr >= 1 && nr <= 4); do_name[11] = '0' + nr; if (args && (args = strchr (args, '<'))) /* Read it from a file */ { for (args++; spacep (args); args++) ; n = get_data_from_file (args, &data); if (n < 0) return -1; } else { data = cpr_get ("cardedit.change_private_do", _("Private DO data: ")); if (!data) return -1; trim_spaces (data); cpr_kill_prompt (); n = strlen (data); } rc = agent_scd_setattr (do_name, data, n, NULL ); if (rc) log_error ("error setting private DO: %s\n", gpg_strerror (rc)); xfree (data); write_sc_op_status (rc); return rc; } static int change_cert (const char *args) { char *data; int n; int rc; if (args && *args == '<') /* Read it from a file */ { for (args++; spacep (args); args++) ; n = get_data_from_file (args, &data); if (n < 0) return -1; } else { tty_printf ("usage error: redirection to file required\n"); return -1; } rc = agent_scd_writecert ("OPENPGP.3", data, n); if (rc) log_error ("error writing certificate to card: %s\n", gpg_strerror (rc)); xfree (data); write_sc_op_status (rc); return rc; } static int read_cert (const char *args) { const char *fname; void *buffer; size_t length; int rc; if (args && *args == '>') /* Write it to a file */ { for (args++; spacep (args); args++) ; fname = args; } else { tty_printf ("usage error: redirection to file required\n"); return -1; } rc = agent_scd_readcert ("OPENPGP.3", &buffer, &length); if (rc) log_error ("error reading certificate from card: %s\n", gpg_strerror (rc)); else rc = put_data_to_file (fname, buffer, length); xfree (buffer); write_sc_op_status (rc); return rc; } static int change_lang (void) { char *data, *p; int rc; data = cpr_get ("cardedit.change_lang", _("Language preferences: ")); if (!data) return -1; trim_spaces (data); cpr_kill_prompt (); if (strlen (data) > 8 || (strlen (data) & 1)) { tty_printf (_("Error: invalid length of preference string.\n")); xfree (data); return -1; } for (p=data; *p && *p >= 'a' && *p <= 'z'; p++) ; if (*p) { tty_printf (_("Error: invalid characters in preference string.\n")); xfree (data); return -1; } rc = agent_scd_setattr ("DISP-LANG", data, strlen (data), NULL ); if (rc) log_error ("error setting lang: %s\n", gpg_strerror (rc)); xfree (data); write_sc_op_status (rc); return rc; } static int change_sex (void) { char *data; const char *str; int rc; data = cpr_get ("cardedit.change_sex", _("Sex ((M)ale, (F)emale or space): ")); if (!data) return -1; trim_spaces (data); cpr_kill_prompt (); if (!*data) str = "9"; else if ((*data == 'M' || *data == 'm') && !data[1]) str = "1"; else if ((*data == 'F' || *data == 'f') && !data[1]) str = "2"; else { tty_printf (_("Error: invalid response.\n")); xfree (data); return -1; } rc = agent_scd_setattr ("DISP-SEX", str, 1, NULL ); if (rc) log_error ("error setting sex: %s\n", gpg_strerror (rc)); xfree (data); write_sc_op_status (rc); return rc; } static int change_cafpr (int fprno) { char *data; const char *s; int i, c, rc; unsigned char fpr[20]; data = cpr_get ("cardedit.change_cafpr", _("CA fingerprint: ")); if (!data) return -1; trim_spaces (data); cpr_kill_prompt (); for (i=0, s=data; i < 20 && *s; ) { while (spacep(s)) s++; if (*s == ':') s++; while (spacep(s)) s++; c = hextobyte (s); if (c == -1) break; fpr[i++] = c; s += 2; } xfree (data); if (i != 20 || *s) { tty_printf (_("Error: invalid formatted fingerprint.\n")); return -1; } rc = agent_scd_setattr (fprno==1?"CA-FPR-1": fprno==2?"CA-FPR-2": fprno==3?"CA-FPR-3":"x", fpr, 20, NULL ); if (rc) log_error ("error setting cafpr: %s\n", gpg_strerror (rc)); write_sc_op_status (rc); return rc; } static void toggle_forcesig (void) { struct agent_card_info_s info; int rc; int newstate; memset (&info, 0, sizeof info); rc = agent_scd_getattr ("CHV-STATUS", &info); if (rc) { log_error ("error getting current status: %s\n", gpg_strerror (rc)); return; } newstate = !info.chv1_cached; agent_release_card_info (&info); rc = agent_scd_setattr ("CHV-STATUS-1", newstate? "\x01":"", 1, NULL); if (rc) log_error ("error toggling signature PIN flag: %s\n", gpg_strerror (rc)); write_sc_op_status (rc); } /* Helper for the key generation/edit functions. */ static int get_info_for_key_operation (struct agent_card_info_s *info) { int rc; memset (info, 0, sizeof *info); rc = agent_scd_getattr ("SERIALNO", info); if (rc || !info->serialno || strncmp (info->serialno, "D27600012401", 12) || strlen (info->serialno) != 32 ) { log_error (_("key operation not possible: %s\n"), rc ? gpg_strerror (rc) : _("not an OpenPGP card")); return rc? rc: -1; } rc = agent_scd_getattr ("KEY-FPR", info); if (!rc) rc = agent_scd_getattr ("CHV-STATUS", info); if (!rc) rc = agent_scd_getattr ("DISP-NAME", info); if (!rc) rc = agent_scd_getattr ("EXTCAP", info); if (!rc) rc = agent_scd_getattr ("KEY-ATTR", info); if (rc) log_error (_("error getting current key info: %s\n"), gpg_strerror (rc)); return rc; } /* Helper for the key generation/edit functions. */ static int check_pin_for_key_operation (struct agent_card_info_s *info, int *forced_chv1) { int rc = 0; agent_clear_pin_cache (info->serialno); *forced_chv1 = !info->chv1_cached; if (*forced_chv1) { /* Switch off the forced mode so that during key generation we don't get bothered with PIN queries for each self-signature. */ rc = agent_scd_setattr ("CHV-STATUS-1", "\x01", 1, info->serialno); if (rc) { log_error ("error clearing forced signature PIN flag: %s\n", gpg_strerror (rc)); *forced_chv1 = 0; } } if (!rc) { /* Check the PIN now, so that we won't get asked later for each binding signature. */ rc = agent_scd_checkpin (info->serialno); if (rc) { log_error ("error checking the PIN: %s\n", gpg_strerror (rc)); write_sc_op_status (rc); } } return rc; } /* Helper for the key generation/edit functions. */ static void restore_forced_chv1 (int *forced_chv1) { int rc; if (*forced_chv1) { /* Switch back to forced state. */ rc = agent_scd_setattr ("CHV-STATUS-1", "", 1, NULL); if (rc) { log_error ("error setting forced signature PIN flag: %s\n", gpg_strerror (rc)); } } } /* Helper for the key generation/edit functions. */ static void show_card_key_info (struct agent_card_info_s *info) { tty_fprintf (NULL, "Signature key ....:"); print_sha1_fpr (NULL, info->fpr1valid? info->fpr1:NULL); tty_fprintf (NULL, "Encryption key....:"); print_sha1_fpr (NULL, info->fpr2valid? info->fpr2:NULL); tty_fprintf (NULL, "Authentication key:"); print_sha1_fpr (NULL, info->fpr3valid? info->fpr3:NULL); tty_printf ("\n"); } /* Helper for the key generation/edit functions. */ static int replace_existing_key_p (struct agent_card_info_s *info, int keyno) { log_assert (keyno >= 0 && keyno <= 3); if ((keyno == 1 && info->fpr1valid) || (keyno == 2 && info->fpr2valid) || (keyno == 3 && info->fpr3valid)) { tty_printf ("\n"); log_info ("WARNING: such a key has already been stored on the card!\n"); tty_printf ("\n"); if ( !cpr_get_answer_is_yes( "cardedit.genkeys.replace_key", _("Replace existing key? (y/N) "))) return -1; return 1; } return 0; } static void show_keysize_warning (void) { static int shown; if (shown) return; shown = 1; tty_printf (_("Note: There is no guarantee that the card " "supports the requested size.\n" " If the key generation does not succeed, " "please check the\n" " documentation of your card to see what " "sizes are allowed.\n")); } /* Ask for the size of a card key. NBITS is the current size configured for the card. KEYNO is the number of the key used to select the prompt. Returns 0 to use the default size (i.e. NBITS) or the selected size. */ static unsigned int ask_card_keyattr (int keyno, unsigned int nbits) { unsigned int min_nbits = 1024; unsigned int max_nbits = 4096; char *prompt, *answer; unsigned int req_nbits; for (;;) { prompt = xasprintf (keyno == 0? _("What keysize do you want for the Signature key? (%u) "): keyno == 1? _("What keysize do you want for the Encryption key? (%u) "): _("What keysize do you want for the Authentication key? (%u) "), nbits); answer = cpr_get ("cardedit.genkeys.size", prompt); cpr_kill_prompt (); req_nbits = *answer? atoi (answer): nbits; xfree (prompt); xfree (answer); if (req_nbits == 25519) { if (req_nbits == nbits) return 0; /* Use default. */ tty_printf (_("The card will now be re-configured" " to generate a key of type: %s\n"), keyno==1? "cv25519":"ed25519"); show_keysize_warning (); return req_nbits; } else { if (req_nbits != nbits && (req_nbits % 32) ) { req_nbits = ((req_nbits + 31) / 32) * 32; tty_printf (_("rounded up to %u bits\n"), req_nbits); } if (req_nbits == nbits) return 0; /* Use default. */ if (req_nbits < min_nbits || req_nbits > max_nbits) { tty_printf (_("%s keysizes must be in the range %u-%u\n"), "RSA", min_nbits, max_nbits); } else { tty_printf (_("The card will now be re-configured" " to generate a key of %u bits\n"), req_nbits); show_keysize_warning (); return req_nbits; } } } } /* Change the size of key KEYNO (0..2) to NBITS and show an error * message if that fails. Using the magic value 25519 for NBITS * switches to ed25519 or cv25519 depending on the KEYNO. */ static gpg_error_t do_change_keyattr (int keyno, unsigned int nbits) { gpg_error_t err; char args[100]; if (nbits == 25519) snprintf (args, sizeof args, "--force %d %d %s", keyno+1, keyno == 1? PUBKEY_ALGO_ECDH : PUBKEY_ALGO_EDDSA, keyno == 1? "cv25519" : "ed25519"); else snprintf (args, sizeof args, "--force %d 1 rsa%u", keyno+1, nbits); err = agent_scd_setattr ("KEY-ATTR", args, strlen (args), NULL); if (err) log_error (_("error changing size of key %d to %u bits: %s\n"), keyno+1, nbits, gpg_strerror (err)); return err; } static void generate_card_keys (ctrl_t ctrl) { struct agent_card_info_s info; int forced_chv1; int want_backup; int keyno; if (get_info_for_key_operation (&info)) return; if (info.extcap.ki) { char *answer; /* FIXME: Should be something like cpr_get_bool so that a status GET_BOOL will be emitted. */ answer = cpr_get ("cardedit.genkeys.backup_enc", _("Make off-card backup of encryption key? (Y/n) ")); want_backup = answer_is_yes_no_default (answer, 1/*(default to Yes)*/); cpr_kill_prompt (); xfree (answer); } else want_backup = 0; if ( (info.fpr1valid && !fpr_is_zero (info.fpr1)) || (info.fpr2valid && !fpr_is_zero (info.fpr2)) || (info.fpr3valid && !fpr_is_zero (info.fpr3))) { tty_printf ("\n"); log_info (_("Note: keys are already stored on the card!\n")); tty_printf ("\n"); if ( !cpr_get_answer_is_yes ("cardedit.genkeys.replace_keys", _("Replace existing keys? (y/N) "))) { agent_release_card_info (&info); return; } } /* If no displayed name has been set, we assume that this is a fresh card and print a hint about the default PINs. */ if (!info.disp_name || !*info.disp_name) { tty_printf ("\n"); tty_printf (_("Please note that the factory settings of the PINs are\n" " PIN = '%s' Admin PIN = '%s'\n" "You should change them using the command --change-pin\n"), "123456", "12345678"); tty_printf ("\n"); } if (check_pin_for_key_operation (&info, &forced_chv1)) goto leave; /* If the cards features changeable key attributes, we ask for the key size. */ if (info.is_v2 && info.extcap.aac) { unsigned int nbits; for (keyno = 0; keyno < DIM (info.key_attr); keyno++) { if (info.key_attr[keyno].algo == PUBKEY_ALGO_RSA || info.key_attr[keyno].algo == PUBKEY_ALGO_ECDH || info.key_attr[keyno].algo == PUBKEY_ALGO_EDDSA) { if (info.key_attr[keyno].algo == PUBKEY_ALGO_RSA) nbits = ask_card_keyattr (keyno, info.key_attr[keyno].nbits); else nbits = ask_card_keyattr (keyno, 25519 /* magic */); if (nbits && do_change_keyattr (keyno, nbits)) { /* Error: Better read the default key size again. */ agent_release_card_info (&info); if (get_info_for_key_operation (&info)) goto leave; /* Ask again for this key size. */ keyno--; } } } /* Note that INFO has not be synced. However we will only use the serialnumber and thus it won't harm. */ } generate_keypair (ctrl, 1, NULL, info.serialno, want_backup); leave: agent_release_card_info (&info); restore_forced_chv1 (&forced_chv1); } /* This function is used by the key edit menu to generate an arbitrary subkey. */ gpg_error_t card_generate_subkey (ctrl_t ctrl, kbnode_t pub_keyblock) { gpg_error_t err; struct agent_card_info_s info; int forced_chv1 = 0; int keyno; err = get_info_for_key_operation (&info); if (err) return err; show_card_key_info (&info); tty_printf (_("Please select the type of key to generate:\n")); tty_printf (_(" (1) Signature key\n")); tty_printf (_(" (2) Encryption key\n")); tty_printf (_(" (3) Authentication key\n")); for (;;) { char *answer = cpr_get ("cardedit.genkeys.subkeytype", _("Your selection? ")); cpr_kill_prompt(); if (*answer == CONTROL_D) { xfree (answer); err = gpg_error (GPG_ERR_CANCELED); goto leave; } keyno = *answer? atoi(answer): 0; xfree(answer); if (keyno >= 1 && keyno <= 3) break; /* Okay. */ tty_printf(_("Invalid selection.\n")); } if (replace_existing_key_p (&info, keyno) < 0) { err = gpg_error (GPG_ERR_CANCELED); goto leave; } err = check_pin_for_key_operation (&info, &forced_chv1); if (err) goto leave; /* If the cards features changeable key attributes, we ask for the key size. */ if (info.is_v2 && info.extcap.aac) { if (info.key_attr[keyno-1].algo == PUBKEY_ALGO_RSA || info.key_attr[keyno].algo == PUBKEY_ALGO_ECDH || info.key_attr[keyno].algo == PUBKEY_ALGO_EDDSA) { unsigned int nbits; ask_again: if (info.key_attr[keyno].algo == PUBKEY_ALGO_RSA) nbits = ask_card_keyattr (keyno-1, info.key_attr[keyno-1].nbits); else nbits = ask_card_keyattr (keyno-1, 25519); if (nbits && do_change_keyattr (keyno-1, nbits)) { /* Error: Better read the default key size again. */ agent_release_card_info (&info); err = get_info_for_key_operation (&info); if (err) goto leave; goto ask_again; } } /* Note that INFO has not be synced. However we will only use the serialnumber and thus it won't harm. */ } err = generate_card_subkeypair (ctrl, pub_keyblock, keyno, info.serialno); leave: agent_release_card_info (&info); restore_forced_chv1 (&forced_chv1); return err; } /* Store the key at NODE into the smartcard and modify NODE to carry the serialno stuff instead of the actual secret key parameters. USE is the usage for that key; 0 means any usage. */ int card_store_subkey (KBNODE node, int use) { struct agent_card_info_s info; int okay = 0; unsigned int nbits; int allow_keyno[3]; int keyno; PKT_public_key *pk; gpg_error_t err; char *hexgrip; int rc; gnupg_isotime_t timebuf; log_assert (node->pkt->pkttype == PKT_PUBLIC_KEY || node->pkt->pkttype == PKT_PUBLIC_SUBKEY); pk = node->pkt->pkt.public_key; if (get_info_for_key_operation (&info)) return 0; if (!info.extcap.ki) { tty_printf ("The card does not support the import of keys\n"); tty_printf ("\n"); goto leave; } nbits = nbits_from_pk (pk); if (!info.is_v2 && nbits != 1024) { tty_printf ("You may only store a 1024 bit RSA key on the card\n"); tty_printf ("\n"); goto leave; } allow_keyno[0] = (!use || (use & (PUBKEY_USAGE_SIG|PUBKEY_USAGE_CERT))); allow_keyno[1] = (!use || (use & (PUBKEY_USAGE_ENC))); allow_keyno[2] = (!use || (use & (PUBKEY_USAGE_SIG|PUBKEY_USAGE_AUTH))); tty_printf (_("Please select where to store the key:\n")); if (allow_keyno[0]) tty_printf (_(" (1) Signature key\n")); if (allow_keyno[1]) tty_printf (_(" (2) Encryption key\n")); if (allow_keyno[2]) tty_printf (_(" (3) Authentication key\n")); for (;;) { char *answer = cpr_get ("cardedit.genkeys.storekeytype", _("Your selection? ")); cpr_kill_prompt(); if (*answer == CONTROL_D || !*answer) { xfree (answer); goto leave; } keyno = *answer? atoi(answer): 0; xfree(answer); if (keyno >= 1 && keyno <= 3 && allow_keyno[keyno-1]) { if (info.is_v2 && !info.extcap.aac && info.key_attr[keyno-1].nbits != nbits) { tty_printf ("Key does not match the card's capability.\n"); } else break; /* Okay. */ } else tty_printf(_("Invalid selection.\n")); } if ((rc = replace_existing_key_p (&info, keyno)) < 0) goto leave; err = hexkeygrip_from_pk (pk, &hexgrip); if (err) goto leave; epoch2isotime (timebuf, (time_t)pk->timestamp); rc = agent_keytocard (hexgrip, keyno, rc, info.serialno, timebuf); if (rc) log_error (_("KEYTOCARD failed: %s\n"), gpg_strerror (rc)); else okay = 1; xfree (hexgrip); leave: agent_release_card_info (&info); return okay; } /* Direct sending of an hex encoded APDU with error printing. */ static gpg_error_t send_apdu (const char *hexapdu, const char *desc, unsigned int ignore) { gpg_error_t err; unsigned int sw; err = agent_scd_apdu (hexapdu, &sw); if (err) tty_printf ("sending card command %s failed: %s\n", desc, gpg_strerror (err)); else if (!hexapdu || !strcmp (hexapdu, "undefined")) ; else if (ignore == 0xffff) ; /* Ignore all status words. */ else if (sw != 0x9000) { switch (sw) { case 0x6285: err = gpg_error (GPG_ERR_OBJ_TERM_STATE); break; case 0x6982: err = gpg_error (GPG_ERR_BAD_PIN); break; case 0x6985: err = gpg_error (GPG_ERR_USE_CONDITIONS); break; default: err = gpg_error (GPG_ERR_CARD); } if (!(ignore && ignore == sw)) tty_printf ("card command %s failed: %s (0x%04x)\n", desc, gpg_strerror (err), sw); } return err; } /* Do a factory reset after confirmation. */ static void factory_reset (void) { struct agent_card_info_s info; gpg_error_t err; char *answer = NULL; int termstate = 0; int i; /* The code below basically does the same what this gpg-connect-agent script does: scd reset scd serialno undefined scd apdu 00 A4 04 00 06 D2 76 00 01 24 01 scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40 scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40 scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40 scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40 scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40 scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40 scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40 scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40 scd apdu 00 e6 00 00 scd apdu 00 44 00 00 scd reset /echo Card has been reset to factory defaults but tries to find out something about the card first. */ err = agent_scd_learn (&info, 0); if (gpg_err_code (err) == GPG_ERR_OBJ_TERM_STATE && gpg_err_source (err) == GPG_ERR_SOURCE_SCD) termstate = 1; else if (err) { log_error (_("OpenPGP card not available: %s\n"), gpg_strerror (err)); goto leave; } if (!termstate) { log_info (_("OpenPGP card no. %s detected\n"), info.serialno? info.serialno : "[none]"); if (!(info.status_indicator == 3 || info.status_indicator == 5)) { /* Note: We won't see status-indicator 3 here because it is not possible to select a card application in termination state. */ log_error (_("This command is not supported by this card\n")); goto leave; } tty_printf ("\n"); log_info (_("Note: This command destroys all keys stored on the card!\n")); tty_printf ("\n"); if (!cpr_get_answer_is_yes ("cardedit.factory-reset.proceed", _("Continue? (y/N) "))) goto leave; answer = cpr_get ("cardedit.factory-reset.really", _("Really do a factory reset? (enter \"yes\") ")); cpr_kill_prompt (); trim_spaces (answer); if (strcmp (answer, "yes")) goto leave; /* We need to select a card application before we can send APDUs to the card without scdaemon doing anything on its own. */ err = send_apdu (NULL, "RESET", 0); if (err) goto leave; err = send_apdu ("undefined", "dummy select ", 0); if (err) goto leave; /* Select the OpenPGP application. */ err = send_apdu ("00A4040006D27600012401", "SELECT AID", 0); if (err) goto leave; /* Do some dummy verifies with wrong PINs to set the retry counter to zero. We can't easily use the card version 2.1 feature of presenting the admin PIN to allow the terminate command because there is no machinery in scdaemon to catch the verify command and ask for the PIN when the "APDU" command is used. */ /* Here, the length of dummy wrong PIN is 32-byte, also supporting authentication with KDF DO. */ for (i=0; i < 4; i++) send_apdu ("0020008120" "40404040404040404040404040404040" "40404040404040404040404040404040", "VERIFY", 0xffff); for (i=0; i < 4; i++) send_apdu ("0020008320" "40404040404040404040404040404040" "40404040404040404040404040404040", "VERIFY", 0xffff); /* Send terminate datafile command. */ err = send_apdu ("00e60000", "TERMINATE DF", 0x6985); if (err) goto leave; } /* Send activate datafile command. This is used without confirmation if the card is already in termination state. */ err = send_apdu ("00440000", "ACTIVATE DF", 0); if (err) goto leave; /* Finally we reset the card reader once more. */ err = send_apdu (NULL, "RESET", 0); /* Then, connect the card again. */ if (!err) { char *serialno0; err = agent_scd_serialno (&serialno0, NULL); if (!err) xfree (serialno0); } leave: xfree (answer); agent_release_card_info (&info); } +#define USER_PIN_DEFAULT "123456" +#define ADMIN_PIN_DEFAULT "12345678" +#define KDF_DATA_LENGTH 110 + +/* Generate KDF data. */ +static gpg_error_t +gen_kdf_data (unsigned char *data) +{ + const unsigned char h0[] = { 0x81, 0x01, 0x03, + 0x82, 0x01, 0x08, + 0x83, 0x04 }; + const unsigned char h1[] = { 0x84, 0x08 }; + const unsigned char h2[] = { 0x85, 0x08 }; + const unsigned char h3[] = { 0x86, 0x08 }; + const unsigned char h4[] = { 0x87, 0x20 }; + const unsigned char h5[] = { 0x88, 0x20 }; + unsigned char *p, *salt_user, *salt_admin; + unsigned char s2k_char; + unsigned int iterations; + unsigned char count_4byte[4]; + gpg_error_t err = 0; + + p = data; + + s2k_char = encode_s2k_iterations (0); + iterations = S2K_DECODE_COUNT (s2k_char); + count_4byte[0] = (iterations >> 24) & 0xff; + count_4byte[1] = (iterations >> 16) & 0xff; + count_4byte[2] = (iterations >> 8) & 0xff; + count_4byte[3] = (iterations & 0xff); + + memcpy (p, h0, sizeof h0); + p += sizeof h0; + memcpy (p, count_4byte, sizeof count_4byte); + p += sizeof count_4byte; + memcpy (p, h1, sizeof h1); + salt_user = (p += sizeof h1); + gcry_randomize (p, 8, GCRY_STRONG_RANDOM); + p += 8; + memcpy (p, h2, sizeof h2); + p += sizeof h2; + gcry_randomize (p, 8, GCRY_STRONG_RANDOM); + p += 8; + memcpy (p, h3, sizeof h3); + salt_admin = (p += sizeof h3); + gcry_randomize (p, 8, GCRY_STRONG_RANDOM); + p += 8; + memcpy (p, h4, sizeof h4); + p += sizeof h4; + err = gcry_kdf_derive (USER_PIN_DEFAULT, strlen (USER_PIN_DEFAULT), + GCRY_KDF_ITERSALTED_S2K, DIGEST_ALGO_SHA256, + salt_user, 8, iterations, 32, p); + p += 32; + if (!err) + { + memcpy (p, h5, sizeof h5); + p += sizeof h5; + err = gcry_kdf_derive (ADMIN_PIN_DEFAULT, strlen (ADMIN_PIN_DEFAULT), + GCRY_KDF_ITERSALTED_S2K, DIGEST_ALGO_SHA256, + salt_admin, 8, iterations, 32, p); + } + + return err; +} + +/* Setup KDF data object which is used for PIN authentication. */ +static void +kdf_setup (void) +{ + struct agent_card_info_s info; + gpg_error_t err; + unsigned char kdf_data[KDF_DATA_LENGTH]; + + memset (&info, 0, sizeof info); + + err = agent_scd_getattr ("EXTCAP", &info); + if (err) + { + log_error (_("error getting card info: %s\n"), gpg_strerror (err)); + return; + } + + if (!info.extcap.kdf) + { + log_error (_("This command is not supported by this card\n")); + goto leave; + } + + if (!(err = gen_kdf_data (kdf_data)) + && !(err = agent_scd_setattr ("KDF", kdf_data, KDF_DATA_LENGTH, NULL))) + err = agent_scd_getattr ("KDF", &info); + + if (err) + log_error (_("error for setup KDF: %s\n"), gpg_strerror (err)); + + leave: + agent_release_card_info (&info); +} /* Data used by the command parser. This needs to be outside of the function scope to allow readline based command completion. */ enum cmdids { cmdNOP = 0, cmdQUIT, cmdADMIN, cmdHELP, cmdLIST, cmdDEBUG, cmdVERIFY, cmdNAME, cmdURL, cmdFETCH, cmdLOGIN, cmdLANG, cmdSEX, cmdCAFPR, cmdFORCESIG, cmdGENERATE, cmdPASSWD, cmdPRIVATEDO, cmdWRITECERT, - cmdREADCERT, cmdUNBLOCK, cmdFACTORYRESET, + cmdREADCERT, cmdUNBLOCK, cmdFACTORYRESET, cmdKDFSETUP, cmdINVCMD }; static struct { const char *name; enum cmdids id; int admin_only; const char *desc; } cmds[] = { { "quit" , cmdQUIT , 0, N_("quit this menu")}, { "q" , cmdQUIT , 0, NULL }, { "admin" , cmdADMIN , 0, N_("show admin commands")}, { "help" , cmdHELP , 0, N_("show this help")}, { "?" , cmdHELP , 0, NULL }, { "list" , cmdLIST , 0, N_("list all available data")}, { "l" , cmdLIST , 0, NULL }, { "debug" , cmdDEBUG , 0, NULL }, { "name" , cmdNAME , 1, N_("change card holder's name")}, { "url" , cmdURL , 1, N_("change URL to retrieve key")}, { "fetch" , cmdFETCH , 0, N_("fetch the key specified in the card URL")}, { "login" , cmdLOGIN , 1, N_("change the login name")}, { "lang" , cmdLANG , 1, N_("change the language preferences")}, { "sex" , cmdSEX , 1, N_("change card holder's sex")}, { "cafpr" , cmdCAFPR , 1, N_("change a CA fingerprint")}, { "forcesig", cmdFORCESIG, 1, N_("toggle the signature force PIN flag")}, { "generate", cmdGENERATE, 1, N_("generate new keys")}, { "passwd" , cmdPASSWD, 0, N_("menu to change or unblock the PIN")}, { "verify" , cmdVERIFY, 0, N_("verify the PIN and list all data")}, { "unblock" , cmdUNBLOCK,0, N_("unblock the PIN using a Reset Code") }, { "factory-reset", cmdFACTORYRESET, 1, N_("destroy all keys and data")}, + { "kdf-setup", cmdKDFSETUP, 1, N_("setup KDF for PIN authentication")}, /* Note, that we do not announce these command yet. */ { "privatedo", cmdPRIVATEDO, 0, NULL }, { "readcert", cmdREADCERT, 0, NULL }, { "writecert", cmdWRITECERT, 1, NULL }, { NULL, cmdINVCMD, 0, NULL } }; #ifdef HAVE_LIBREADLINE /* These two functions are used by readline for command completion. */ static char * command_generator(const char *text,int state) { static int list_index,len; const char *name; /* If this is a new word to complete, initialize now. This includes saving the length of TEXT for efficiency, and initializing the index variable to 0. */ if(!state) { list_index=0; len=strlen(text); } /* Return the next partial match */ while((name=cmds[list_index].name)) { /* Only complete commands that have help text */ if(cmds[list_index++].desc && strncmp(name,text,len)==0) return strdup(name); } return NULL; } static char ** card_edit_completion(const char *text, int start, int end) { (void)end; /* If we are at the start of a line, we try and command-complete. If not, just do nothing for now. */ if(start==0) return rl_completion_matches(text,command_generator); rl_attempted_completion_over=1; return NULL; } #endif /*HAVE_LIBREADLINE*/ /* Menu to edit all user changeable values on an OpenPGP card. Only Key creation is not handled here. */ void card_edit (ctrl_t ctrl, strlist_t commands) { enum cmdids cmd = cmdNOP; int have_commands = !!commands; int redisplay = 1; char *answer = NULL; int allow_admin=0; char serialnobuf[50]; if (opt.command_fd != -1) ; else if (opt.batch && !have_commands) { log_error(_("can't do this in batch mode\n")); goto leave; } for (;;) { int arg_number; const char *arg_string = ""; const char *arg_rest = ""; char *p; int i; int cmd_admin_only; tty_printf("\n"); if (redisplay) { if (opt.with_colons) { current_card_status (ctrl, es_stdout, serialnobuf, DIM (serialnobuf)); fflush (stdout); } else { current_card_status (ctrl, NULL, serialnobuf, DIM (serialnobuf)); tty_printf("\n"); } redisplay = 0; } do { xfree (answer); if (have_commands) { if (commands) { answer = xstrdup (commands->d); commands = commands->next; } else if (opt.batch) { answer = xstrdup ("quit"); } else have_commands = 0; } if (!have_commands) { tty_enable_completion (card_edit_completion); answer = cpr_get_no_help("cardedit.prompt", _("gpg/card> ")); cpr_kill_prompt(); tty_disable_completion (); } trim_spaces(answer); } while ( *answer == '#' ); arg_number = 0; /* Yes, here is the init which egcc complains about */ cmd_admin_only = 0; if (!*answer) cmd = cmdLIST; /* Default to the list command */ else if (*answer == CONTROL_D) cmd = cmdQUIT; else { if ((p=strchr (answer,' '))) { *p++ = 0; trim_spaces (answer); trim_spaces (p); arg_number = atoi(p); arg_string = p; arg_rest = p; while (digitp (arg_rest)) arg_rest++; while (spacep (arg_rest)) arg_rest++; } for (i=0; cmds[i].name; i++ ) if (!ascii_strcasecmp (answer, cmds[i].name )) break; cmd = cmds[i].id; cmd_admin_only = cmds[i].admin_only; } if (!allow_admin && cmd_admin_only) { tty_printf ("\n"); tty_printf (_("Admin-only command\n")); continue; } switch (cmd) { case cmdHELP: for (i=0; cmds[i].name; i++ ) if(cmds[i].desc && (!cmds[i].admin_only || (cmds[i].admin_only && allow_admin))) tty_printf("%-14s %s\n", cmds[i].name, _(cmds[i].desc) ); break; case cmdADMIN: if ( !strcmp (arg_string, "on") ) allow_admin = 1; else if ( !strcmp (arg_string, "off") ) allow_admin = 0; else if ( !strcmp (arg_string, "verify") ) { /* Force verification of the Admin Command. However, this is only done if the retry counter is at initial state. */ char *tmp = xmalloc (strlen (serialnobuf) + 6 + 1); strcpy (stpcpy (tmp, serialnobuf), "[CHV3]"); allow_admin = !agent_scd_checkpin (tmp); xfree (tmp); } else /* Toggle. */ allow_admin=!allow_admin; if(allow_admin) tty_printf(_("Admin commands are allowed\n")); else tty_printf(_("Admin commands are not allowed\n")); break; case cmdVERIFY: agent_scd_checkpin (serialnobuf); redisplay = 1; break; case cmdLIST: redisplay = 1; break; case cmdNAME: change_name (); break; case cmdURL: change_url (); break; case cmdFETCH: fetch_url (ctrl); break; case cmdLOGIN: change_login (arg_string); break; case cmdLANG: change_lang (); break; case cmdSEX: change_sex (); break; case cmdCAFPR: if ( arg_number < 1 || arg_number > 3 ) tty_printf ("usage: cafpr N\n" " 1 <= N <= 3\n"); else change_cafpr (arg_number); break; case cmdPRIVATEDO: if ( arg_number < 1 || arg_number > 4 ) tty_printf ("usage: privatedo N\n" " 1 <= N <= 4\n"); else change_private_do (arg_string, arg_number); break; case cmdWRITECERT: if ( arg_number != 3 ) tty_printf ("usage: writecert 3 < FILE\n"); else change_cert (arg_rest); break; case cmdREADCERT: if ( arg_number != 3 ) tty_printf ("usage: readcert 3 > FILE\n"); else read_cert (arg_rest); break; case cmdFORCESIG: toggle_forcesig (); break; case cmdGENERATE: generate_card_keys (ctrl); break; case cmdPASSWD: change_pin (0, allow_admin); break; case cmdUNBLOCK: change_pin (1, allow_admin); break; case cmdFACTORYRESET: factory_reset (); break; + case cmdKDFSETUP: + kdf_setup (); + break; + case cmdQUIT: goto leave; case cmdNOP: break; case cmdINVCMD: default: tty_printf ("\n"); tty_printf (_("Invalid command (try \"help\")\n")); break; } /* End command switch. */ } /* End of main menu loop. */ leave: xfree (answer); } diff --git a/scd/app-openpgp.c b/scd/app-openpgp.c index f3065edf0..e0c9d5959 100644 --- a/scd/app-openpgp.c +++ b/scd/app-openpgp.c @@ -1,5241 +1,5242 @@ /* 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 . */ /* 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 #include #include #include #include #include #include #include #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, "Sex" }, { 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, 0, 1, 0, 0, 0, 0, "General Feature Management"}, { 0x00D5, 0, 0, 1, 0, 0, 0, 0, "AES key data"}, { 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< 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 syncronized Bit 1 = CHV2 has been set to the default PIN of "123456" (this implies that bit 0 is also set). P= Where PINPAD_REQUEST is in the format of: or ,. 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 }, { "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", + "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.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.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; } /* 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; unsigned char *buffer; size_t buflen; if (app->app_local->extcap.kdf_do && (relptr = get_one_do (app, 0x00F9, &buffer, &buflen, NULL)) && buflen == 110 && (buffer[2] == 0x03)) { char *salt; unsigned long s2k_count; char dek[32]; salt = &buffer[(chvno==3 ? 34 : (chvno==0 ? 24 : 14))]; s2k_count = (((unsigned int)buffer[8] << 24) | (buffer[9] << 16) | (buffer[10] << 8) | buffer[11]); 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); } xfree (relptr); } else *r_pinlen = strlen (pinvalue); 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 }, { "KDF", 0x00F9, 3, 0, 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 == 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); return rc; } /* Handle the WRITECERT command for OpenPGP. This rites the standard certifciate 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 (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 || buf[0] != PUBKEY_ALGO_RSA) { /* Attriutes too short or not an RSA key. */ xfree (relptr); err = gpg_error (GPG_ERR_CARD); } else { /* 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; 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 rsa" ECC: "--force " */ 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 public exponent 0xC1 prime p 0xC2 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); 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 "[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 ("Curve with OID not supported: ", buffer+1, buflen-1); 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; }