diff --git a/scd/apdu.c b/scd/apdu.c index b369a268c..962eb7191 100644 --- a/scd/apdu.c +++ b/scd/apdu.c @@ -1,4075 +1,4054 @@ /* apdu.c - ISO 7816 APDU functions and low level I/O * Copyright (C) 2003, 2004, 2008, 2009 Free Software Foundation, Inc. * * This file is part of GnuPG. * * GnuPG is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * GnuPG is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ /* NOTE: This module is also used by other software, thus the use of the macro USE_GNU_PTH is mandatory. For GnuPG this macro is guaranteed to be defined true. */ #include #include #include #include #include #include #include #ifdef USE_GNU_PTH # include # include # include #endif /* If requested include the definitions for the remote APDU protocol code. */ #ifdef USE_G10CODE_RAPDU #include "rapdu.h" #endif /*USE_G10CODE_RAPDU*/ #if defined(GNUPG_SCD_MAIN_HEADER) #include GNUPG_SCD_MAIN_HEADER #elif 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 "util.h" #include "i18n.h" #include "dynload.h" #include "cardglue.h" #else /* GNUPG_MAJOR_VERSION != 1 */ #include "scdaemon.h" #include "exechelp.h" #endif /* GNUPG_MAJOR_VERSION != 1 */ #include "apdu.h" #include "ccid-driver.h" #include "iso7816.h" /* Due to conflicting use of threading libraries we usually can't link against libpcsclite. Instead we use a wrapper program. */ #ifdef USE_GNU_PTH #if !defined(HAVE_W32_SYSTEM) && !defined(__CYGWIN__) #define NEED_PCSC_WRAPPER 1 #endif #endif #define MAX_READER 4 /* Number of readers we support concurrently. */ #if defined(_WIN32) || defined(__CYGWIN__) #define DLSTDCALL __stdcall #else #define DLSTDCALL #endif /* Helper to pass parameters related to keypad based operations. */ struct pininfo_s { int mode; int minlen; int maxlen; int padlen; }; /* A structure to collect information pertaining to one reader slot. */ struct reader_table_s { int used; /* True if slot is used. */ unsigned short port; /* Port number: 0 = unused, 1 - dev/tty */ /* Function pointers intialized to the various backends. */ int (*connect_card)(int); int (*disconnect_card)(int); int (*close_reader)(int); int (*shutdown_reader)(int); int (*reset_reader)(int); int (*get_status_reader)(int, unsigned int *); int (*send_apdu_reader)(int,unsigned char *,size_t, unsigned char *, size_t *, struct pininfo_s *); int (*check_keypad)(int, int, int, int, int, int); void (*dump_status_reader)(int); int (*set_progress_cb)(int, gcry_handler_progress_t, void*); int (*keypad_verify)(int, int, int, int, int, struct pininfo_s *); int (*keypad_modify)(int, int, int, int, int, struct pininfo_s *); struct { ccid_driver_t handle; } ccid; struct { unsigned long context; unsigned long card; unsigned long protocol; unsigned long verify_ioctl; unsigned long modify_ioctl; #ifdef NEED_PCSC_WRAPPER int req_fd; int rsp_fd; pid_t pid; #endif /*NEED_PCSC_WRAPPER*/ } pcsc; #ifdef USE_G10CODE_RAPDU struct { rapdu_t handle; } rapdu; #endif /*USE_G10CODE_RAPDU*/ char *rdrname; /* Name of the connected reader or NULL if unknown. */ int any_status; /* True if we have seen any status. */ int last_status; int status; int is_t0; /* True if we know that we are running T=0. */ unsigned char atr[33]; size_t atrlen; /* A zero length indicates that the ATR has not yet been read; i.e. the card is not ready for use. */ unsigned int change_counter; #ifdef USE_GNU_PTH int lock_initialized; pth_mutex_t lock; #endif }; typedef struct reader_table_s *reader_table_t; /* A global table to keep track of active readers. */ static struct reader_table_s reader_table[MAX_READER]; /* ct API function pointer. */ static char (* DLSTDCALL CT_init) (unsigned short ctn, unsigned short Pn); static char (* DLSTDCALL CT_data) (unsigned short ctn, unsigned char *dad, unsigned char *sad, unsigned short lc, unsigned char *cmd, unsigned short *lr, unsigned char *rsp); static char (* DLSTDCALL CT_close) (unsigned short ctn); /* PC/SC constants and function pointer. */ #define PCSC_SCOPE_USER 0 #define PCSC_SCOPE_TERMINAL 1 #define PCSC_SCOPE_SYSTEM 2 #define PCSC_SCOPE_GLOBAL 3 #define PCSC_PROTOCOL_T0 1 #define PCSC_PROTOCOL_T1 2 #define PCSC_PROTOCOL_RAW 4 #define PCSC_SHARE_EXCLUSIVE 1 #define PCSC_SHARE_SHARED 2 #define PCSC_SHARE_DIRECT 3 #define PCSC_LEAVE_CARD 0 #define PCSC_RESET_CARD 1 #define PCSC_UNPOWER_CARD 2 #define PCSC_EJECT_CARD 3 #define PCSC_UNKNOWN 0x0001 #define PCSC_ABSENT 0x0002 /* Card is absent. */ #define PCSC_PRESENT 0x0004 /* Card is present. */ #define PCSC_SWALLOWED 0x0008 /* Card is present and electrical connected. */ #define PCSC_POWERED 0x0010 /* Card is powered. */ #define PCSC_NEGOTIABLE 0x0020 /* Card is awaiting PTS. */ #define PCSC_SPECIFIC 0x0040 /* Card is ready for use. */ #define PCSC_STATE_UNAWARE 0x0000 /* Want status. */ #define PCSC_STATE_IGNORE 0x0001 /* Ignore this reader. */ #define PCSC_STATE_CHANGED 0x0002 /* State has changed. */ #define PCSC_STATE_UNKNOWN 0x0004 /* Reader unknown. */ #define PCSC_STATE_UNAVAILABLE 0x0008 /* Status unavailable. */ #define PCSC_STATE_EMPTY 0x0010 /* Card removed. */ #define PCSC_STATE_PRESENT 0x0020 /* Card inserted. */ #define PCSC_STATE_ATRMATCH 0x0040 /* ATR matches card. */ #define PCSC_STATE_EXCLUSIVE 0x0080 /* Exclusive Mode. */ #define PCSC_STATE_INUSE 0x0100 /* Shared mode. */ #define PCSC_STATE_MUTE 0x0200 /* Unresponsive card. */ /* Some PC/SC error codes. */ #define PCSC_E_CANCELLED 0x80100002 #define PCSC_E_CANT_DISPOSE 0x8010000E #define PCSC_E_INSUFFICIENT_BUFFER 0x80100008 #define PCSC_E_INVALID_ATR 0x80100015 #define PCSC_E_INVALID_HANDLE 0x80100003 #define PCSC_E_INVALID_PARAMETER 0x80100004 #define PCSC_E_INVALID_TARGET 0x80100005 #define PCSC_E_INVALID_VALUE 0x80100011 #define PCSC_E_NO_MEMORY 0x80100006 #define PCSC_E_UNKNOWN_READER 0x80100009 #define PCSC_E_TIMEOUT 0x8010000A #define PCSC_E_SHARING_VIOLATION 0x8010000B #define PCSC_E_NO_SMARTCARD 0x8010000C #define PCSC_E_UNKNOWN_CARD 0x8010000D #define PCSC_E_PROTO_MISMATCH 0x8010000F #define PCSC_E_NOT_READY 0x80100010 #define PCSC_E_SYSTEM_CANCELLED 0x80100012 #define PCSC_E_NOT_TRANSACTED 0x80100016 #define PCSC_E_READER_UNAVAILABLE 0x80100017 #define PCSC_E_NO_SERVICE 0x8010001D #define PCSC_W_REMOVED_CARD 0x80100069 #define CM_IOCTL_GET_FEATURE_REQUEST (0x42000000 + 3400) #define FEATURE_VERIFY_PIN_DIRECT 0x06 #define FEATURE_MODIFY_PIN_DIRECT 0x07 /* The PC/SC error is defined as a long as per specs. Due to left shifts bit 31 will get sign extended. We use this mask to fix it. */ #define PCSC_ERR_MASK(a) ((a) & 0xffffffff) struct pcsc_io_request_s { unsigned long protocol; unsigned long pci_len; }; typedef struct pcsc_io_request_s *pcsc_io_request_t; struct pcsc_readerstate_s { const char *reader; void *user_data; unsigned long current_state; unsigned long event_state; unsigned long atrlen; unsigned char atr[33]; }; typedef struct pcsc_readerstate_s *pcsc_readerstate_t; long (* DLSTDCALL pcsc_establish_context) (unsigned long scope, const void *reserved1, const void *reserved2, unsigned long *r_context); long (* DLSTDCALL pcsc_release_context) (unsigned long context); long (* DLSTDCALL pcsc_list_readers) (unsigned long context, const char *groups, char *readers, unsigned long*readerslen); long (* DLSTDCALL pcsc_get_status_change) (unsigned long context, unsigned long timeout, pcsc_readerstate_t readerstates, unsigned long nreaderstates); long (* DLSTDCALL pcsc_connect) (unsigned long context, const char *reader, unsigned long share_mode, unsigned long preferred_protocols, unsigned long *r_card, unsigned long *r_active_protocol); long (* DLSTDCALL pcsc_reconnect) (unsigned long card, unsigned long share_mode, unsigned long preferred_protocols, unsigned long initialization, unsigned long *r_active_protocol); long (* DLSTDCALL pcsc_disconnect) (unsigned long card, unsigned long disposition); long (* DLSTDCALL pcsc_status) (unsigned long card, char *reader, unsigned long *readerlen, unsigned long *r_state, unsigned long *r_protocol, unsigned char *atr, unsigned long *atrlen); long (* DLSTDCALL pcsc_begin_transaction) (unsigned long card); long (* DLSTDCALL pcsc_end_transaction) (unsigned long card, unsigned long disposition); long (* DLSTDCALL pcsc_transmit) (unsigned long card, const pcsc_io_request_t send_pci, const unsigned char *send_buffer, unsigned long send_len, pcsc_io_request_t recv_pci, unsigned char *recv_buffer, unsigned long *recv_len); long (* DLSTDCALL pcsc_set_timeout) (unsigned long context, unsigned long timeout); long (* DLSTDCALL pcsc_control) (unsigned long card, unsigned long control_code, const void *send_buffer, unsigned long send_len, void *recv_buffer, unsigned long recv_len, unsigned long *bytes_returned); -/* Flag set if PC/SC returned the no-service error. */ -static int pcsc_no_service; - /* Prototypes. */ static int pcsc_get_status (int slot, unsigned int *status); static int reset_pcsc_reader (int slot); static int apdu_get_status_internal (int slot, int hang, int no_atr_reset, unsigned int *status, unsigned int *changed); static int check_pcsc_keypad (int slot, int command, int pin_mode, int pinlen_min, int pinlen_max, int pin_padlen); static int pcsc_keypad_verify (int slot, int class, int ins, int p0, int p1, struct pininfo_s *pininfo); static int pcsc_keypad_modify (int slot, int class, int ins, int p0, int p1, struct pininfo_s *pininfo); /* Helper */ static int lock_slot (int slot) { #ifdef USE_GNU_PTH if (!pth_mutex_acquire (&reader_table[slot].lock, 0, NULL)) { log_error ("failed to acquire apdu lock: %s\n", strerror (errno)); return SW_HOST_LOCKING_FAILED; } #endif /*USE_GNU_PTH*/ return 0; } static int trylock_slot (int slot) { #ifdef USE_GNU_PTH if (!pth_mutex_acquire (&reader_table[slot].lock, TRUE, NULL)) { if (errno == EBUSY) return SW_HOST_BUSY; log_error ("failed to acquire apdu lock: %s\n", strerror (errno)); return SW_HOST_LOCKING_FAILED; } #endif /*USE_GNU_PTH*/ return 0; } static void unlock_slot (int slot) { #ifdef USE_GNU_PTH if (!pth_mutex_release (&reader_table[slot].lock)) log_error ("failed to release apdu lock: %s\n", strerror (errno)); #endif /*USE_GNU_PTH*/ } /* Find an unused reader slot for PORTSTR and put it into the reader table. Return -1 on error or the index into the reader table. Acquire slot's lock on successful return. Caller needs to unlock it. */ static int new_reader_slot (void) { int i, reader = -1; for (i=0; i < MAX_READER; i++) { if (!reader_table[i].used && reader == -1) reader = i; } if (reader == -1) { log_error ("new_reader_slot: out of slots\n"); return -1; } #ifdef USE_GNU_PTH if (!reader_table[reader].lock_initialized) { if (!pth_mutex_init (&reader_table[reader].lock)) { log_error ("error initializing mutex: %s\n", strerror (errno)); return -1; } reader_table[reader].lock_initialized = 1; } #endif /*USE_GNU_PTH*/ if (lock_slot (reader)) { log_error ("error locking mutex: %s\n", strerror (errno)); return -1; } reader_table[reader].connect_card = NULL; reader_table[reader].disconnect_card = NULL; reader_table[reader].close_reader = NULL; reader_table[reader].shutdown_reader = NULL; reader_table[reader].reset_reader = NULL; reader_table[reader].get_status_reader = NULL; reader_table[reader].send_apdu_reader = NULL; reader_table[reader].check_keypad = check_pcsc_keypad; reader_table[reader].dump_status_reader = NULL; reader_table[reader].set_progress_cb = NULL; reader_table[reader].keypad_verify = pcsc_keypad_verify; reader_table[reader].keypad_modify = pcsc_keypad_modify; reader_table[reader].used = 1; reader_table[reader].any_status = 0; reader_table[reader].last_status = 0; reader_table[reader].is_t0 = 1; #ifdef NEED_PCSC_WRAPPER reader_table[reader].pcsc.req_fd = -1; reader_table[reader].pcsc.rsp_fd = -1; reader_table[reader].pcsc.pid = (pid_t)(-1); #endif reader_table[reader].pcsc.verify_ioctl = 0; reader_table[reader].pcsc.modify_ioctl = 0; return reader; } static void dump_reader_status (int slot) { if (!opt.verbose) return; if (reader_table[slot].dump_status_reader) reader_table[slot].dump_status_reader (slot); if (reader_table[slot].status != -1 && reader_table[slot].atrlen) { log_info ("slot %d: ATR=", slot); log_printhex ("", reader_table[slot].atr, reader_table[slot].atrlen); } } static const char * host_sw_string (long err) { switch (err) { case 0: return "okay"; case SW_HOST_OUT_OF_CORE: return "out of core"; case SW_HOST_INV_VALUE: return "invalid value"; case SW_HOST_NO_DRIVER: return "no driver"; case SW_HOST_NOT_SUPPORTED: return "not supported"; case SW_HOST_LOCKING_FAILED: return "locking failed"; case SW_HOST_BUSY: return "busy"; case SW_HOST_NO_CARD: return "no card"; case SW_HOST_CARD_INACTIVE: return "card inactive"; case SW_HOST_CARD_IO_ERROR: return "card I/O error"; case SW_HOST_GENERAL_ERROR: return "general error"; case SW_HOST_NO_READER: return "no reader"; case SW_HOST_ABORTED: return "aborted"; case SW_HOST_NO_KEYPAD: return "no keypad"; case SW_HOST_ALREADY_CONNECTED: return "already connected"; default: return "unknown host status error"; } } const char * apdu_strerror (int rc) { switch (rc) { case SW_EOF_REACHED : return "eof reached"; case SW_EEPROM_FAILURE : return "eeprom failure"; case SW_WRONG_LENGTH : return "wrong length"; case SW_CHV_WRONG : return "CHV wrong"; case SW_CHV_BLOCKED : return "CHV blocked"; case SW_USE_CONDITIONS : return "use conditions not satisfied"; case SW_BAD_PARAMETER : return "bad parameter"; case SW_NOT_SUPPORTED : return "not supported"; case SW_FILE_NOT_FOUND : return "file not found"; case SW_RECORD_NOT_FOUND:return "record not found"; case SW_REF_NOT_FOUND : return "reference not found"; case SW_BAD_LC : return "bad Lc"; case SW_BAD_P0_P1 : return "bad P0 or P1"; case SW_INS_NOT_SUP : return "instruction not supported"; case SW_CLA_NOT_SUP : return "class not supported"; case SW_SUCCESS : return "success"; default: if ((rc & ~0x00ff) == SW_MORE_DATA) return "more data available"; if ( (rc & 0x10000) ) return host_sw_string (rc); return "unknown status error"; } } /* ct API Interface */ static const char * ct_error_string (long err) { switch (err) { case 0: return "okay"; case -1: return "invalid data"; case -8: return "ct error"; case -10: return "transmission error"; case -11: return "memory allocation error"; case -128: return "HTSI error"; default: return "unknown CT-API error"; } } static void ct_dump_reader_status (int slot) { log_info ("reader slot %d: %s\n", slot, reader_table[slot].status == 1? "Processor ICC present" : reader_table[slot].status == 0? "Memory ICC present" : "ICC not present" ); } /* Wait for the card in SLOT and activate it. Return a status word error or 0 on success. */ static int ct_activate_card (int slot) { int rc; unsigned char dad[1], sad[1], cmd[11], buf[256]; unsigned short buflen; /* Check whether card has been inserted. */ dad[0] = 1; /* Destination address: CT. */ sad[0] = 2; /* Source address: Host. */ cmd[0] = 0x20; /* Class byte. */ cmd[1] = 0x13; /* Request status. */ cmd[2] = 0x00; /* From kernel. */ cmd[3] = 0x80; /* Return card's DO. */ cmd[4] = 0x00; buflen = DIM(buf); rc = CT_data (slot, dad, sad, 5, cmd, &buflen, buf); if (rc || buflen < 2 || buf[buflen-2] != 0x90) { log_error ("ct_activate_card: can't get status of reader %d: %s\n", slot, ct_error_string (rc)); return SW_HOST_CARD_IO_ERROR; } /* Connected, now activate the card. */ dad[0] = 1; /* Destination address: CT. */ sad[0] = 2; /* Source address: Host. */ cmd[0] = 0x20; /* Class byte. */ cmd[1] = 0x12; /* Request ICC. */ cmd[2] = 0x01; /* From first interface. */ cmd[3] = 0x01; /* Return card's ATR. */ cmd[4] = 0x00; buflen = DIM(buf); rc = CT_data (slot, dad, sad, 5, cmd, &buflen, buf); if (rc || buflen < 2 || buf[buflen-2] != 0x90) { log_error ("ct_activate_card(%d): activation failed: %s\n", slot, ct_error_string (rc)); if (!rc) log_printhex (" received data:", buf, buflen); return SW_HOST_CARD_IO_ERROR; } /* Store the type and the ATR. */ if (buflen - 2 > DIM (reader_table[0].atr)) { log_error ("ct_activate_card(%d): ATR too long\n", slot); return SW_HOST_CARD_IO_ERROR; } reader_table[slot].status = buf[buflen - 1]; memcpy (reader_table[slot].atr, buf, buflen - 2); reader_table[slot].atrlen = buflen - 2; return 0; } static int close_ct_reader (int slot) { CT_close (slot); reader_table[slot].used = 0; return 0; } static int reset_ct_reader (int slot) { /* FIXME: Check is this is sufficient do do a reset. */ return ct_activate_card (slot); } static int ct_get_status (int slot, unsigned int *status) { (void)slot; /* The status we returned is wrong but we don't care becuase ctAPI is not anymore required. */ *status = APDU_CARD_USABLE|APDU_CARD_PRESENT|APDU_CARD_ACTIVE; return 0; } /* Actually send the APDU of length APDULEN to SLOT and return a maximum of *BUFLEN data in BUFFER, the actual retruned size will be set to BUFLEN. Returns: CT API error code. */ static int ct_send_apdu (int slot, unsigned char *apdu, size_t apdulen, unsigned char *buffer, size_t *buflen, struct pininfo_s *pininfo) { int rc; unsigned char dad[1], sad[1]; unsigned short ctbuflen; (void)pininfo; /* If we don't have an ATR, we need to reset the reader first. */ if (!reader_table[slot].atrlen && (rc = reset_ct_reader (slot))) return rc; dad[0] = 0; /* Destination address: Card. */ sad[0] = 2; /* Source address: Host. */ ctbuflen = *buflen; if (DBG_CARD_IO) log_printhex (" CT_data:", apdu, apdulen); rc = CT_data (slot, dad, sad, apdulen, apdu, &ctbuflen, buffer); *buflen = ctbuflen; return rc? SW_HOST_CARD_IO_ERROR: 0; } /* Open a reader and return an internal handle for it. PORT is a non-negative value with the port number of the reader. USB readers do have port numbers starting at 32769. */ static int open_ct_reader (int port) { int rc, reader; if (port < 0 || port > 0xffff) { log_error ("open_ct_reader: invalid port %d requested\n", port); return -1; } reader = new_reader_slot (); if (reader == -1) return reader; reader_table[reader].port = port; rc = CT_init (reader, (unsigned short)port); if (rc) { log_error ("apdu_open_ct_reader failed on port %d: %s\n", port, ct_error_string (rc)); reader_table[reader].used = 0; unlock_slot (reader); return -1; } /* Only try to activate the card. */ rc = ct_activate_card (reader); if (rc) { reader_table[reader].atrlen = 0; rc = 0; } reader_table[reader].close_reader = close_ct_reader; reader_table[reader].reset_reader = reset_ct_reader; reader_table[reader].get_status_reader = ct_get_status; reader_table[reader].send_apdu_reader = ct_send_apdu; reader_table[reader].check_keypad = NULL; reader_table[reader].dump_status_reader = ct_dump_reader_status; reader_table[reader].keypad_verify = NULL; reader_table[reader].keypad_modify = NULL; dump_reader_status (reader); unlock_slot (reader); return reader; } /* PC/SC Interface */ #ifdef NEED_PCSC_WRAPPER static int writen (int fd, const void *buf, size_t nbytes) { size_t nleft = nbytes; int nwritten; /* log_printhex (" writen:", buf, nbytes); */ while (nleft > 0) { #ifdef USE_GNU_PTH nwritten = pth_write (fd, buf, nleft); #else nwritten = write (fd, buf, nleft); #endif if (nwritten < 0 && errno == EINTR) continue; if (nwritten < 0) return -1; nleft -= nwritten; buf = (const char*)buf + nwritten; } return 0; } /* Read up to BUFLEN bytes from FD and return the number of bytes actually read in NREAD. Returns -1 on error or 0 on success. */ static int readn (int fd, void *buf, size_t buflen, size_t *nread) { size_t nleft = buflen; int n; /* void *orig_buf = buf; */ while (nleft > 0) { #ifdef USE_GNU_PTH # ifdef HAVE_W32_SYSTEM # error Cannot use pth_read here because it expects a system HANDLE. # endif n = pth_read (fd, buf, nleft); #else n = read (fd, buf, nleft); #endif if (n < 0 && errno == EINTR) continue; if (n < 0) return -1; /* read error. */ if (!n) break; /* EOF */ nleft -= n; buf = (char*)buf + n; } if (nread) *nread = buflen - nleft; /* log_printhex (" readn:", orig_buf, *nread); */ return 0; } #endif /*NEED_PCSC_WRAPPER*/ static const char * pcsc_error_string (long err) { const char *s; if (!err) return "okay"; if ((err & 0x80100000) != 0x80100000) return "invalid PC/SC error code"; err &= 0xffff; switch (err) { case 0x0002: s = "cancelled"; break; case 0x000e: s = "can't dispose"; break; case 0x0008: s = "insufficient buffer"; break; case 0x0015: s = "invalid ATR"; break; case 0x0003: s = "invalid handle"; break; case 0x0004: s = "invalid parameter"; break; case 0x0005: s = "invalid target"; break; case 0x0011: s = "invalid value"; break; case 0x0006: s = "no memory"; break; case 0x0013: s = "comm error"; break; case 0x0001: s = "internal error"; break; case 0x0014: s = "unknown error"; break; case 0x0007: s = "waited too long"; break; case 0x0009: s = "unknown reader"; break; case 0x000a: s = "timeout"; break; case 0x000b: s = "sharing violation"; break; case 0x000c: s = "no smartcard"; break; case 0x000d: s = "unknown card"; break; case 0x000f: s = "proto mismatch"; break; case 0x0010: s = "not ready"; break; case 0x0012: s = "system cancelled"; break; case 0x0016: s = "not transacted"; break; case 0x0017: s = "reader unavailable"; break; case 0x0065: s = "unsupported card"; break; case 0x0066: s = "unresponsive card"; break; case 0x0067: s = "unpowered card"; break; case 0x0068: s = "reset card"; break; case 0x0069: s = "removed card"; break; case 0x006a: s = "inserted card"; break; case 0x001f: s = "unsupported feature"; break; case 0x0019: s = "PCI too small"; break; case 0x001a: s = "reader unsupported"; break; case 0x001b: s = "duplicate reader"; break; case 0x001c: s = "card unsupported"; break; case 0x001d: s = "no service"; break; case 0x001e: s = "service stopped"; break; default: s = "unknown PC/SC error code"; break; } return s; } /* Map PC/SC error codes to our special host status words. */ static int pcsc_error_to_sw (long ec) { int rc; switch ( PCSC_ERR_MASK (ec) ) { case 0: rc = 0; break; case PCSC_E_CANCELLED: rc = SW_HOST_ABORTED; break; case PCSC_E_NO_MEMORY: rc = SW_HOST_OUT_OF_CORE; break; case PCSC_E_TIMEOUT: rc = SW_HOST_CARD_IO_ERROR; break; case PCSC_E_UNKNOWN_READER: rc = SW_HOST_NO_READER; break; case PCSC_E_SHARING_VIOLATION: rc = SW_HOST_LOCKING_FAILED; break; case PCSC_E_NO_SMARTCARD: rc = SW_HOST_NO_CARD; break; case PCSC_W_REMOVED_CARD: rc = SW_HOST_NO_CARD; break; case PCSC_E_INVALID_TARGET: case PCSC_E_INVALID_VALUE: case PCSC_E_INVALID_HANDLE: case PCSC_E_INVALID_PARAMETER: case PCSC_E_INSUFFICIENT_BUFFER: rc = SW_HOST_INV_VALUE; break; default: rc = SW_HOST_GENERAL_ERROR; break; } return rc; } static void dump_pcsc_reader_status (int slot) { if (reader_table[slot].pcsc.card) { log_info ("reader slot %d: active protocol:", slot); if ((reader_table[slot].pcsc.protocol & PCSC_PROTOCOL_T0)) log_printf (" T0"); else if ((reader_table[slot].pcsc.protocol & PCSC_PROTOCOL_T1)) log_printf (" T1"); else if ((reader_table[slot].pcsc.protocol & PCSC_PROTOCOL_RAW)) log_printf (" raw"); log_printf ("\n"); } else log_info ("reader slot %d: not connected\n", slot); } #ifndef NEED_PCSC_WRAPPER static int pcsc_get_status_direct (int slot, unsigned int *status) { long err; struct pcsc_readerstate_s rdrstates[1]; memset (rdrstates, 0, sizeof *rdrstates); rdrstates[0].reader = reader_table[slot].rdrname; rdrstates[0].current_state = PCSC_STATE_UNAWARE; err = pcsc_get_status_change (reader_table[slot].pcsc.context, 0, rdrstates, 1); if (err == PCSC_E_TIMEOUT) err = 0; /* Timeout is no error error here. */ if (err) { log_error ("pcsc_get_status_change failed: %s (0x%lx)\n", pcsc_error_string (err), err); return pcsc_error_to_sw (err); } /* log_debug */ /* ("pcsc_get_status_change: %s%s%s%s%s%s%s%s%s%s\n", */ /* (rdrstates[0].event_state & PCSC_STATE_IGNORE)? " ignore":"", */ /* (rdrstates[0].event_state & PCSC_STATE_CHANGED)? " changed":"", */ /* (rdrstates[0].event_state & PCSC_STATE_UNKNOWN)? " unknown":"", */ /* (rdrstates[0].event_state & PCSC_STATE_UNAVAILABLE)?" unavail":"", */ /* (rdrstates[0].event_state & PCSC_STATE_EMPTY)? " empty":"", */ /* (rdrstates[0].event_state & PCSC_STATE_PRESENT)? " present":"", */ /* (rdrstates[0].event_state & PCSC_STATE_ATRMATCH)? " atr":"", */ /* (rdrstates[0].event_state & PCSC_STATE_EXCLUSIVE)? " excl":"", */ /* (rdrstates[0].event_state & PCSC_STATE_INUSE)? " unuse":"", */ /* (rdrstates[0].event_state & PCSC_STATE_MUTE)? " mute":"" ); */ *status = 0; if ( (rdrstates[0].event_state & PCSC_STATE_PRESENT) ) *status |= APDU_CARD_PRESENT; if ( !(rdrstates[0].event_state & PCSC_STATE_MUTE) ) *status |= APDU_CARD_ACTIVE; #ifndef HAVE_W32_SYSTEM /* We indicate a useful card if it is not in use by another application. This is because we only use exclusive access mode. */ if ( (*status & (APDU_CARD_PRESENT|APDU_CARD_ACTIVE)) == (APDU_CARD_PRESENT|APDU_CARD_ACTIVE) && !(rdrstates[0].event_state & PCSC_STATE_INUSE) ) *status |= APDU_CARD_USABLE; #else /* Some winscard drivers may set EXCLUSIVE and INUSE at the same time when we are the only user (SCM SCR335) under Windows. */ if ((*status & (APDU_CARD_PRESENT|APDU_CARD_ACTIVE)) == (APDU_CARD_PRESENT|APDU_CARD_ACTIVE)) *status |= APDU_CARD_USABLE; #endif return 0; } #endif /*!NEED_PCSC_WRAPPER*/ #ifdef NEED_PCSC_WRAPPER static int pcsc_get_status_wrapped (int slot, unsigned int *status) { long err; reader_table_t slotp; size_t len, full_len; int i, n; unsigned char msgbuf[9]; unsigned char buffer[16]; int sw = SW_HOST_CARD_IO_ERROR; slotp = reader_table + slot; if (slotp->pcsc.req_fd == -1 || slotp->pcsc.rsp_fd == -1 || slotp->pcsc.pid == (pid_t)(-1) ) { log_error ("pcsc_get_status: pcsc-wrapper not running\n"); return sw; } msgbuf[0] = 0x04; /* STATUS command. */ len = 0; msgbuf[1] = (len >> 24); msgbuf[2] = (len >> 16); msgbuf[3] = (len >> 8); msgbuf[4] = (len ); if ( writen (slotp->pcsc.req_fd, msgbuf, 5) ) { log_error ("error sending PC/SC STATUS request: %s\n", strerror (errno)); goto command_failed; } /* Read the response. */ if ((i=readn (slotp->pcsc.rsp_fd, msgbuf, 9, &len)) || len != 9) { log_error ("error receiving PC/SC STATUS response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } len = (msgbuf[1] << 24) | (msgbuf[2] << 16) | (msgbuf[3] << 8 ) | msgbuf[4]; if (msgbuf[0] != 0x81 || len < 4) { log_error ("invalid response header from PC/SC received\n"); goto command_failed; } len -= 4; /* Already read the error code. */ err = PCSC_ERR_MASK ((msgbuf[5] << 24) | (msgbuf[6] << 16) | (msgbuf[7] << 8 ) | msgbuf[8]); if (err) { log_error ("pcsc_status failed: %s (0x%lx)\n", pcsc_error_string (err), err); /* This is a proper error code, so return immediately. */ return pcsc_error_to_sw (err); } full_len = len; /* The current version returns 3 words but we allow also for old versions returning only 2 words. */ n = 12 < len ? 12 : len; if ((i=readn (slotp->pcsc.rsp_fd, buffer, n, &len)) || (len != 8 && len != 12)) { log_error ("error receiving PC/SC STATUS response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } slotp->is_t0 = (len == 12 && !!(buffer[11] & PCSC_PROTOCOL_T0)); full_len -= len; /* Newer versions of the wrapper might send more status bytes. Read them. */ while (full_len) { unsigned char dummybuf[128]; n = full_len < DIM (dummybuf) ? full_len : DIM (dummybuf); if ((i=readn (slotp->pcsc.rsp_fd, dummybuf, n, &len)) || len != n) { log_error ("error receiving PC/SC TRANSMIT response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } full_len -= n; } /* We are lucky: The wrapper already returns the data in the required format. */ *status = buffer[3]; return 0; command_failed: close (slotp->pcsc.req_fd); close (slotp->pcsc.rsp_fd); slotp->pcsc.req_fd = -1; slotp->pcsc.rsp_fd = -1; kill (slotp->pcsc.pid, SIGTERM); slotp->pcsc.pid = (pid_t)(-1); slotp->used = 0; return sw; } #endif /*NEED_PCSC_WRAPPER*/ static int pcsc_get_status (int slot, unsigned int *status) { #ifdef NEED_PCSC_WRAPPER return pcsc_get_status_wrapped (slot, status); #else return pcsc_get_status_direct (slot, status); #endif } #ifndef NEED_PCSC_WRAPPER static int pcsc_send_apdu_direct (int slot, unsigned char *apdu, size_t apdulen, unsigned char *buffer, size_t *buflen, struct pininfo_s *pininfo) { long err; struct pcsc_io_request_s send_pci; unsigned long recv_len; if (!reader_table[slot].atrlen && (err = reset_pcsc_reader (slot))) return err; if (DBG_CARD_IO) log_printhex (" PCSC_data:", apdu, apdulen); if ((reader_table[slot].pcsc.protocol & PCSC_PROTOCOL_T1)) send_pci.protocol = PCSC_PROTOCOL_T1; else send_pci.protocol = PCSC_PROTOCOL_T0; send_pci.pci_len = sizeof send_pci; recv_len = *buflen; err = pcsc_transmit (reader_table[slot].pcsc.card, &send_pci, apdu, apdulen, NULL, buffer, &recv_len); *buflen = recv_len; if (err) log_error ("pcsc_transmit failed: %s (0x%lx)\n", pcsc_error_string (err), err); return pcsc_error_to_sw (err); } #endif /*!NEED_PCSC_WRAPPER*/ #ifdef NEED_PCSC_WRAPPER static int pcsc_send_apdu_wrapped (int slot, unsigned char *apdu, size_t apdulen, unsigned char *buffer, size_t *buflen, struct pininfo_s *pininfo) { long err; reader_table_t slotp; size_t len, full_len; int i, n; unsigned char msgbuf[9]; int sw = SW_HOST_CARD_IO_ERROR; (void)pininfo; if (!reader_table[slot].atrlen && (err = reset_pcsc_reader (slot))) return err; if (DBG_CARD_IO) log_printhex (" PCSC_data:", apdu, apdulen); slotp = reader_table + slot; if (slotp->pcsc.req_fd == -1 || slotp->pcsc.rsp_fd == -1 || slotp->pcsc.pid == (pid_t)(-1) ) { log_error ("pcsc_send_apdu: pcsc-wrapper not running\n"); return sw; } msgbuf[0] = 0x03; /* TRANSMIT command. */ len = apdulen; msgbuf[1] = (len >> 24); msgbuf[2] = (len >> 16); msgbuf[3] = (len >> 8); msgbuf[4] = (len ); if ( writen (slotp->pcsc.req_fd, msgbuf, 5) || writen (slotp->pcsc.req_fd, apdu, len)) { log_error ("error sending PC/SC TRANSMIT request: %s\n", strerror (errno)); goto command_failed; } /* Read the response. */ if ((i=readn (slotp->pcsc.rsp_fd, msgbuf, 9, &len)) || len != 9) { log_error ("error receiving PC/SC TRANSMIT response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } len = (msgbuf[1] << 24) | (msgbuf[2] << 16) | (msgbuf[3] << 8 ) | msgbuf[4]; if (msgbuf[0] != 0x81 || len < 4) { log_error ("invalid response header from PC/SC received\n"); goto command_failed; } len -= 4; /* Already read the error code. */ err = PCSC_ERR_MASK ((msgbuf[5] << 24) | (msgbuf[6] << 16) | (msgbuf[7] << 8 ) | msgbuf[8]); if (err) { log_error ("pcsc_transmit failed: %s (0x%lx)\n", pcsc_error_string (err), err); return pcsc_error_to_sw (err); } full_len = len; n = *buflen < len ? *buflen : len; if ((i=readn (slotp->pcsc.rsp_fd, buffer, n, &len)) || len != n) { log_error ("error receiving PC/SC TRANSMIT response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } *buflen = n; full_len -= len; if (full_len) { log_error ("pcsc_send_apdu: provided buffer too short - truncated\n"); err = SW_HOST_INV_VALUE; } /* We need to read any rest of the response, to keep the protocol running. */ while (full_len) { unsigned char dummybuf[128]; n = full_len < DIM (dummybuf) ? full_len : DIM (dummybuf); if ((i=readn (slotp->pcsc.rsp_fd, dummybuf, n, &len)) || len != n) { log_error ("error receiving PC/SC TRANSMIT response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } full_len -= n; } return err; command_failed: close (slotp->pcsc.req_fd); close (slotp->pcsc.rsp_fd); slotp->pcsc.req_fd = -1; slotp->pcsc.rsp_fd = -1; kill (slotp->pcsc.pid, SIGTERM); slotp->pcsc.pid = (pid_t)(-1); slotp->used = 0; return sw; } #endif /*NEED_PCSC_WRAPPER*/ /* Send the APDU of length APDULEN to SLOT and return a maximum of *BUFLEN data in BUFFER, the actual returned size will be stored at BUFLEN. Returns: A status word. */ static int pcsc_send_apdu (int slot, unsigned char *apdu, size_t apdulen, unsigned char *buffer, size_t *buflen, struct pininfo_s *pininfo) { #ifdef NEED_PCSC_WRAPPER return pcsc_send_apdu_wrapped (slot, apdu, apdulen, buffer, buflen, pininfo); #else return pcsc_send_apdu_direct (slot, apdu, apdulen, buffer, buflen, pininfo); #endif } #ifndef NEED_PCSC_WRAPPER static int control_pcsc_direct (int slot, unsigned long ioctl_code, const unsigned char *cntlbuf, size_t len, unsigned char *buffer, size_t *buflen) { long err; err = pcsc_control (reader_table[slot].pcsc.card, ioctl_code, cntlbuf, len, buffer, *buflen, buflen); if (err) { log_error ("pcsc_control failed: %s (0x%lx)\n", pcsc_error_string (err), err); return pcsc_error_to_sw (err); } return 0; } #endif /*!NEED_PCSC_WRAPPER*/ #ifdef NEED_PCSC_WRAPPER static int control_pcsc_wrapped (int slot, unsigned long ioctl_code, const unsigned char *cntlbuf, size_t len, unsigned char *buffer, size_t *buflen) { long err = PCSC_E_NOT_TRANSACTED; reader_table_t slotp; unsigned char msgbuf[9]; int i, n; size_t full_len; slotp = reader_table + slot; msgbuf[0] = 0x06; /* CONTROL command. */ msgbuf[1] = ((len + 4) >> 24); msgbuf[2] = ((len + 4) >> 16); msgbuf[3] = ((len + 4) >> 8); msgbuf[4] = ((len + 4) ); msgbuf[5] = (ioctl_code >> 24); msgbuf[6] = (ioctl_code >> 16); msgbuf[7] = (ioctl_code >> 8); msgbuf[8] = (ioctl_code ); if ( writen (slotp->pcsc.req_fd, msgbuf, 9) || writen (slotp->pcsc.req_fd, cntlbuf, len)) { log_error ("error sending PC/SC CONTROL request: %s\n", strerror (errno)); goto command_failed; } /* Read the response. */ if ((i=readn (slotp->pcsc.rsp_fd, msgbuf, 9, &len)) || len != 9) { log_error ("error receiving PC/SC CONTROL response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } len = (msgbuf[1] << 24) | (msgbuf[2] << 16) | (msgbuf[3] << 8 ) | msgbuf[4]; if (msgbuf[0] != 0x81 || len < 4) { log_error ("invalid response header from PC/SC received\n"); goto command_failed; } len -= 4; /* Already read the error code. */ err = PCSC_ERR_MASK ((msgbuf[5] << 24) | (msgbuf[6] << 16) | (msgbuf[7] << 8 ) | msgbuf[8]); if (err) { log_error ("pcsc_control failed: %s (0x%lx)\n", pcsc_error_string (err), err); return pcsc_error_to_sw (err); } full_len = len; n = *buflen < len ? *buflen : len; if ((i=readn (slotp->pcsc.rsp_fd, buffer, n, &len)) || len != n) { log_error ("error receiving PC/SC CONTROL response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } *buflen = n; full_len -= len; if (full_len) { log_error ("pcsc_send_apdu: provided buffer too short - truncated\n"); err = PCSC_E_INVALID_VALUE; } /* We need to read any rest of the response, to keep the protocol running. */ while (full_len) { unsigned char dummybuf[128]; n = full_len < DIM (dummybuf) ? full_len : DIM (dummybuf); if ((i=readn (slotp->pcsc.rsp_fd, dummybuf, n, &len)) || len != n) { log_error ("error receiving PC/SC CONTROL response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } full_len -= n; } if (!err) return 0; command_failed: close (slotp->pcsc.req_fd); close (slotp->pcsc.rsp_fd); slotp->pcsc.req_fd = -1; slotp->pcsc.rsp_fd = -1; kill (slotp->pcsc.pid, SIGTERM); slotp->pcsc.pid = (pid_t)(-1); slotp->used = 0; return pcsc_error_to_sw (err); } #endif /*NEED_PCSC_WRAPPER*/ /* Do some control with the value of IOCTL_CODE to the card inserted to SLOT. Input buffer is specified by CNTLBUF of length LEN. Output buffer is specified by BUFFER of length *BUFLEN, and the actual output size will be stored at BUFLEN. Returns: A status word. This routine is used for PIN pad input support. */ static int control_pcsc (int slot, unsigned long ioctl_code, const unsigned char *cntlbuf, size_t len, unsigned char *buffer, size_t *buflen) { #ifdef NEED_PCSC_WRAPPER return control_pcsc_wrapped (slot, ioctl_code, cntlbuf, len, buffer, buflen); #else return control_pcsc_direct (slot, ioctl_code, cntlbuf, len, buffer, buflen); #endif } #ifndef NEED_PCSC_WRAPPER static int close_pcsc_reader_direct (int slot) { pcsc_release_context (reader_table[slot].pcsc.context); xfree (reader_table[slot].rdrname); reader_table[slot].rdrname = NULL; reader_table[slot].used = 0; return 0; } #endif /*!NEED_PCSC_WRAPPER*/ #ifdef NEED_PCSC_WRAPPER static int close_pcsc_reader_wrapped (int slot) { long err; reader_table_t slotp; size_t len; int i; unsigned char msgbuf[9]; slotp = reader_table + slot; if (slotp->pcsc.req_fd == -1 || slotp->pcsc.rsp_fd == -1 || slotp->pcsc.pid == (pid_t)(-1) ) { log_error ("close_pcsc_reader: pcsc-wrapper not running\n"); return 0; } msgbuf[0] = 0x02; /* CLOSE command. */ len = 0; msgbuf[1] = (len >> 24); msgbuf[2] = (len >> 16); msgbuf[3] = (len >> 8); msgbuf[4] = (len ); if ( writen (slotp->pcsc.req_fd, msgbuf, 5) ) { log_error ("error sending PC/SC CLOSE request: %s\n", strerror (errno)); goto command_failed; } /* Read the response. */ if ((i=readn (slotp->pcsc.rsp_fd, msgbuf, 9, &len)) || len != 9) { log_error ("error receiving PC/SC CLOSE response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } len = (msgbuf[1] << 24) | (msgbuf[2] << 16) | (msgbuf[3] << 8 ) | msgbuf[4]; if (msgbuf[0] != 0x81 || len < 4) { log_error ("invalid response header from PC/SC received\n"); goto command_failed; } len -= 4; /* Already read the error code. */ err = PCSC_ERR_MASK ((msgbuf[5] << 24) | (msgbuf[6] << 16) | (msgbuf[7] << 8 ) | msgbuf[8]); if (err) log_error ("pcsc_close failed: %s (0x%lx)\n", pcsc_error_string (err), err); /* We will close the wrapper in any case - errors are merely informational. */ command_failed: close (slotp->pcsc.req_fd); close (slotp->pcsc.rsp_fd); slotp->pcsc.req_fd = -1; slotp->pcsc.rsp_fd = -1; kill (slotp->pcsc.pid, SIGTERM); slotp->pcsc.pid = (pid_t)(-1); slotp->used = 0; return 0; } #endif /*NEED_PCSC_WRAPPER*/ static int close_pcsc_reader (int slot) { #ifdef NEED_PCSC_WRAPPER return close_pcsc_reader_wrapped (slot); #else return close_pcsc_reader_direct (slot); #endif } /* Connect a PC/SC card. */ #ifndef NEED_PCSC_WRAPPER static int connect_pcsc_card (int slot) { long err; assert (slot >= 0 && slot < MAX_READER); if (reader_table[slot].pcsc.card) return SW_HOST_ALREADY_CONNECTED; reader_table[slot].atrlen = 0; reader_table[slot].last_status = 0; reader_table[slot].is_t0 = 0; err = pcsc_connect (reader_table[slot].pcsc.context, reader_table[slot].rdrname, PCSC_SHARE_EXCLUSIVE, PCSC_PROTOCOL_T0|PCSC_PROTOCOL_T1, &reader_table[slot].pcsc.card, &reader_table[slot].pcsc.protocol); if (err) { reader_table[slot].pcsc.card = 0; if (err != PCSC_E_NO_SMARTCARD) log_error ("pcsc_connect failed: %s (0x%lx)\n", pcsc_error_string (err), err); } else { char reader[250]; unsigned long readerlen, atrlen; unsigned long card_state, card_protocol; atrlen = DIM (reader_table[0].atr); readerlen = sizeof reader -1 ; err = pcsc_status (reader_table[slot].pcsc.card, reader, &readerlen, &card_state, &card_protocol, reader_table[slot].atr, &atrlen); if (err) log_error ("pcsc_status failed: %s (0x%lx) %lu\n", pcsc_error_string (err), err, readerlen); else { if (atrlen > DIM (reader_table[0].atr)) log_bug ("ATR returned by pcsc_status is too large\n"); reader_table[slot].atrlen = atrlen; /* If we got to here we know that a card is present and usable. Remember this. */ reader_table[slot].last_status = ( APDU_CARD_USABLE | APDU_CARD_PRESENT | APDU_CARD_ACTIVE); reader_table[slot].is_t0 = !!(card_protocol & PCSC_PROTOCOL_T0); } } dump_reader_status (slot); return pcsc_error_to_sw (err); } #endif /*!NEED_PCSC_WRAPPER*/ /* Disconnect a PC/SC card. Note that this succeeds even if the card is not connected. */ #ifndef NEED_PCSC_WRAPPER static int disconnect_pcsc_card (int slot) { long err; assert (slot >= 0 && slot < MAX_READER); if (!reader_table[slot].pcsc.card) return 0; err = pcsc_disconnect (reader_table[slot].pcsc.card, PCSC_LEAVE_CARD); if (err) { log_error ("pcsc_disconnect failed: %s (0x%lx)\n", pcsc_error_string (err), err); return SW_HOST_CARD_IO_ERROR; } reader_table[slot].pcsc.card = 0; return 0; } #endif /*!NEED_PCSC_WRAPPER*/ #ifndef NEED_PCSC_WRAPPER static int reset_pcsc_reader_direct (int slot) { int sw; sw = disconnect_pcsc_card (slot); if (!sw) sw = connect_pcsc_card (slot); return sw; } #endif /*NEED_PCSC_WRAPPER*/ #ifdef NEED_PCSC_WRAPPER static int reset_pcsc_reader_wrapped (int slot) { long err; reader_table_t slotp; size_t len; int i, n; unsigned char msgbuf[9]; unsigned int dummy_status; int sw = SW_HOST_CARD_IO_ERROR; slotp = reader_table + slot; if (slotp->pcsc.req_fd == -1 || slotp->pcsc.rsp_fd == -1 || slotp->pcsc.pid == (pid_t)(-1) ) { log_error ("pcsc_get_status: pcsc-wrapper not running\n"); return sw; } msgbuf[0] = 0x05; /* RESET command. */ len = 0; msgbuf[1] = (len >> 24); msgbuf[2] = (len >> 16); msgbuf[3] = (len >> 8); msgbuf[4] = (len ); if ( writen (slotp->pcsc.req_fd, msgbuf, 5) ) { log_error ("error sending PC/SC RESET request: %s\n", strerror (errno)); goto command_failed; } /* Read the response. */ if ((i=readn (slotp->pcsc.rsp_fd, msgbuf, 9, &len)) || len != 9) { log_error ("error receiving PC/SC RESET response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } len = (msgbuf[1] << 24) | (msgbuf[2] << 16) | (msgbuf[3] << 8 ) | msgbuf[4]; if (msgbuf[0] != 0x81 || len < 4) { log_error ("invalid response header from PC/SC received\n"); goto command_failed; } len -= 4; /* Already read the error code. */ if (len > DIM (slotp->atr)) { log_error ("PC/SC returned a too large ATR (len=%lx)\n", (unsigned long)len); sw = SW_HOST_GENERAL_ERROR; goto command_failed; } err = PCSC_ERR_MASK ((msgbuf[5] << 24) | (msgbuf[6] << 16) | (msgbuf[7] << 8 ) | msgbuf[8]); if (err) { log_error ("PC/SC RESET failed: %s (0x%lx)\n", pcsc_error_string (err), err); /* If the error code is no smart card, we should not considere this a major error and close the wrapper. */ sw = pcsc_error_to_sw (err); if (err == PCSC_E_NO_SMARTCARD) return sw; goto command_failed; } /* The open function may return a zero for the ATR length to indicate that no card is present. */ n = len; if (n) { if ((i=readn (slotp->pcsc.rsp_fd, slotp->atr, n, &len)) || len != n) { log_error ("error receiving PC/SC RESET response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } } slotp->atrlen = len; /* Read the status so that IS_T0 will be set. */ pcsc_get_status (slot, &dummy_status); return 0; command_failed: close (slotp->pcsc.req_fd); close (slotp->pcsc.rsp_fd); slotp->pcsc.req_fd = -1; slotp->pcsc.rsp_fd = -1; kill (slotp->pcsc.pid, SIGTERM); slotp->pcsc.pid = (pid_t)(-1); slotp->used = 0; return sw; } #endif /* !NEED_PCSC_WRAPPER */ /* Send an PC/SC reset command and return a status word on error or 0 on success. */ static int reset_pcsc_reader (int slot) { #ifdef NEED_PCSC_WRAPPER return reset_pcsc_reader_wrapped (slot); #else return reset_pcsc_reader_direct (slot); #endif } /* Open the PC/SC reader without using the wrapper. Returns -1 on error or a slot number for the reader. */ #ifndef NEED_PCSC_WRAPPER static int open_pcsc_reader_direct (const char *portstr) { long err; int slot; char *list = NULL; unsigned long nreader, listlen; char *p; slot = new_reader_slot (); if (slot == -1) return -1; /* Fixme: Allocating a context for each slot is not required. One global context should be sufficient. */ err = pcsc_establish_context (PCSC_SCOPE_SYSTEM, NULL, NULL, &reader_table[slot].pcsc.context); if (err) { log_error ("pcsc_establish_context failed: %s (0x%lx)\n", pcsc_error_string (err), err); reader_table[slot].used = 0; unlock_slot (slot); - if (err == PCSC_E_NO_SERVICE) - pcsc_no_service = 1; return -1; } - pcsc_no_service = 0; err = pcsc_list_readers (reader_table[slot].pcsc.context, NULL, NULL, &nreader); if (!err) { list = xtrymalloc (nreader+1); /* Better add 1 for safety reasons. */ if (!list) { log_error ("error allocating memory for reader list\n"); pcsc_release_context (reader_table[slot].pcsc.context); reader_table[slot].used = 0; unlock_slot (slot); return -1 /*SW_HOST_OUT_OF_CORE*/; } err = pcsc_list_readers (reader_table[slot].pcsc.context, NULL, list, &nreader); } if (err) { log_error ("pcsc_list_readers failed: %s (0x%lx)\n", pcsc_error_string (err), err); pcsc_release_context (reader_table[slot].pcsc.context); reader_table[slot].used = 0; xfree (list); unlock_slot (slot); return -1; } listlen = nreader; p = list; while (nreader) { if (!*p && !p[1]) break; if (*p) log_info ("detected reader `%s'\n", p); if (nreader < (strlen (p)+1)) { log_error ("invalid response from pcsc_list_readers\n"); break; } nreader -= strlen (p)+1; p += strlen (p) + 1; } reader_table[slot].rdrname = xtrymalloc (strlen (portstr? portstr : list)+1); if (!reader_table[slot].rdrname) { log_error ("error allocating memory for reader name\n"); pcsc_release_context (reader_table[slot].pcsc.context); reader_table[slot].used = 0; unlock_slot (slot); return -1; } strcpy (reader_table[slot].rdrname, portstr? portstr : list); xfree (list); list = NULL; reader_table[slot].pcsc.card = 0; reader_table[slot].atrlen = 0; reader_table[slot].last_status = 0; reader_table[slot].connect_card = connect_pcsc_card; reader_table[slot].disconnect_card = disconnect_pcsc_card; reader_table[slot].close_reader = close_pcsc_reader; reader_table[slot].reset_reader = reset_pcsc_reader; reader_table[slot].get_status_reader = pcsc_get_status; reader_table[slot].send_apdu_reader = pcsc_send_apdu; reader_table[slot].dump_status_reader = dump_pcsc_reader_status; dump_reader_status (slot); unlock_slot (slot); return slot; } #endif /*!NEED_PCSC_WRAPPER */ /* Open the PC/SC reader using the pcsc_wrapper program. This is needed to cope with different thread models and other peculiarities of libpcsclite. */ #ifdef NEED_PCSC_WRAPPER static int open_pcsc_reader_wrapped (const char *portstr) { int slot; reader_table_t slotp; int fd, rp[2], wp[2]; int n, i; pid_t pid; size_t len; unsigned char msgbuf[9]; int err; unsigned int dummy_status; /*int sw = SW_HOST_CARD_IO_ERROR;*/ /* Note that we use the constant and not the fucntion because this code won't be be used under Windows. */ const char *wrapperpgm = GNUPG_LIBEXECDIR "/gnupg-pcsc-wrapper"; if (access (wrapperpgm, X_OK)) { log_error ("can't run PC/SC access module `%s': %s\n", wrapperpgm, strerror (errno)); - pcsc_no_service = 1; return -1; } slot = new_reader_slot (); if (slot == -1) return -1; slotp = reader_table + slot; /* Fire up the PC/SCc wrapper. We don't use any fork/exec code from the common directy but implement it directly so that this file may still be source copied. */ if (pipe (rp) == -1) { log_error ("error creating a pipe: %s\n", strerror (errno)); slotp->used = 0; unlock_slot (slot); return -1; } if (pipe (wp) == -1) { log_error ("error creating a pipe: %s\n", strerror (errno)); close (rp[0]); close (rp[1]); slotp->used = 0; unlock_slot (slot); return -1; } pid = fork (); if (pid == -1) { log_error ("error forking process: %s\n", strerror (errno)); close (rp[0]); close (rp[1]); close (wp[0]); close (wp[1]); slotp->used = 0; unlock_slot (slot); return -1; } slotp->pcsc.pid = pid; if (!pid) { /* === Child === */ /* Double fork. */ pid = fork (); if (pid == -1) _exit (31); if (pid) _exit (0); /* Immediate exit this parent, so that the child gets cleaned up by the init process. */ /* Connect our pipes. */ if (wp[0] != 0 && dup2 (wp[0], 0) == -1) log_fatal ("dup2 stdin failed: %s\n", strerror (errno)); if (rp[1] != 1 && dup2 (rp[1], 1) == -1) log_fatal ("dup2 stdout failed: %s\n", strerror (errno)); /* Send stderr to the bit bucket. */ fd = open ("/dev/null", O_WRONLY); if (fd == -1) log_fatal ("can't open `/dev/null': %s", strerror (errno)); if (fd != 2 && dup2 (fd, 2) == -1) log_fatal ("dup2 stderr failed: %s\n", strerror (errno)); /* Close all other files. */ close_all_fds (3, NULL); execl (wrapperpgm, "pcsc-wrapper", "--", "1", /* API version */ opt.pcsc_driver, /* Name of the PC/SC library. */ NULL); _exit (31); } /* === Parent === */ close (wp[0]); close (rp[1]); slotp->pcsc.req_fd = wp[1]; slotp->pcsc.rsp_fd = rp[0]; /* Wait for the intermediate child to terminate. */ #ifdef USE_GNU_PTH #define WAIT pth_waitpid #else #define WAIT waitpid #endif while ( (i=WAIT (pid, NULL, 0)) == -1 && errno == EINTR) ; #undef WAIT - pcsc_no_service = 1; - /* Now send the open request. */ msgbuf[0] = 0x01; /* OPEN command. */ len = portstr? strlen (portstr):0; msgbuf[1] = (len >> 24); msgbuf[2] = (len >> 16); msgbuf[3] = (len >> 8); msgbuf[4] = (len ); if ( writen (slotp->pcsc.req_fd, msgbuf, 5) || (portstr && writen (slotp->pcsc.req_fd, portstr, len))) { log_error ("error sending PC/SC OPEN request: %s\n", strerror (errno)); goto command_failed; } /* Read the response. */ if ((i=readn (slotp->pcsc.rsp_fd, msgbuf, 9, &len)) || len != 9) { log_error ("error receiving PC/SC OPEN response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } len = (msgbuf[1] << 24) | (msgbuf[2] << 16) | (msgbuf[3] << 8 ) | msgbuf[4]; if (msgbuf[0] != 0x81 || len < 4) { log_error ("invalid response header from PC/SC received\n"); goto command_failed; } len -= 4; /* Already read the error code. */ if (len > DIM (slotp->atr)) { log_error ("PC/SC returned a too large ATR (len=%lx)\n", (unsigned long)len); - pcsc_no_service = 0; goto command_failed; } err = PCSC_ERR_MASK ((msgbuf[5] << 24) | (msgbuf[6] << 16) | (msgbuf[7] << 8 ) | msgbuf[8]); - if (err != PCSC_E_NO_SERVICE) - pcsc_no_service = 0; - if (err) { log_error ("PC/SC OPEN failed: %s (0x%08x)\n", pcsc_error_string (err), err); /*sw = pcsc_error_to_sw (err);*/ goto command_failed; } slotp->last_status = 0; /* The open request may return a zero for the ATR length to indicate that no card is present. */ n = len; if (n) { if ((i=readn (slotp->pcsc.rsp_fd, slotp->atr, n, &len)) || len != n) { log_error ("error receiving PC/SC OPEN response: %s\n", i? strerror (errno) : "premature EOF"); goto command_failed; } /* If we got to here we know that a card is present and usable. Thus remember this. */ slotp->last_status = ( APDU_CARD_USABLE | APDU_CARD_PRESENT | APDU_CARD_ACTIVE); } slotp->atrlen = len; reader_table[slot].close_reader = close_pcsc_reader; reader_table[slot].reset_reader = reset_pcsc_reader; reader_table[slot].get_status_reader = pcsc_get_status; reader_table[slot].send_apdu_reader = pcsc_send_apdu; reader_table[slot].dump_status_reader = dump_pcsc_reader_status; /* Read the status so that IS_T0 will be set. */ pcsc_get_status (slot, &dummy_status); dump_reader_status (slot); unlock_slot (slot); return slot; command_failed: close (slotp->pcsc.req_fd); close (slotp->pcsc.rsp_fd); slotp->pcsc.req_fd = -1; slotp->pcsc.rsp_fd = -1; kill (slotp->pcsc.pid, SIGTERM); slotp->pcsc.pid = (pid_t)(-1); slotp->used = 0; unlock_slot (slot); /* There is no way to return SW. */ return -1; } #endif /*NEED_PCSC_WRAPPER*/ static int open_pcsc_reader (const char *portstr) { #ifdef NEED_PCSC_WRAPPER return open_pcsc_reader_wrapped (portstr); #else return open_pcsc_reader_direct (portstr); #endif } /* Check whether the reader supports the ISO command code COMMAND on the keypad. Return 0 on success. */ static int check_pcsc_keypad (int slot, int command, int pin_mode, int pinlen_min, int pinlen_max, int pin_padlen) { unsigned char buf[256]; size_t len = 256; int sw; (void)pin_mode; (void)pinlen_min; (void)pinlen_max; (void)pin_padlen; check_again: if (command == ISO7816_VERIFY) { if (reader_table[slot].pcsc.verify_ioctl == (unsigned long)-1) return SW_NOT_SUPPORTED; else if (reader_table[slot].pcsc.verify_ioctl != 0) return 0; /* Success */ } else if (command == ISO7816_CHANGE_REFERENCE_DATA) { if (reader_table[slot].pcsc.modify_ioctl == (unsigned long)-1) return SW_NOT_SUPPORTED; else if (reader_table[slot].pcsc.modify_ioctl != 0) return 0; /* Success */ } else return SW_NOT_SUPPORTED; reader_table[slot].pcsc.verify_ioctl = (unsigned long)-1; reader_table[slot].pcsc.modify_ioctl = (unsigned long)-1; sw = control_pcsc (slot, CM_IOCTL_GET_FEATURE_REQUEST, NULL, 0, buf, &len); if (sw) return SW_NOT_SUPPORTED; else { unsigned char *p = buf; while (p < buf + len) { unsigned char code = *p++; p++; /* Skip length */ if (code == FEATURE_VERIFY_PIN_DIRECT) reader_table[slot].pcsc.verify_ioctl = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]; else if (code == FEATURE_MODIFY_PIN_DIRECT) reader_table[slot].pcsc.modify_ioctl = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]; p += 4; } } goto check_again; } #define PIN_VERIFY_STRUCTURE_SIZE 24 static int pcsc_keypad_verify (int slot, int class, int ins, int p0, int p1, struct pininfo_s *pininfo) { int sw; unsigned char *pin_verify; int len = PIN_VERIFY_STRUCTURE_SIZE; unsigned char result[2]; size_t resultlen = 2; if (!reader_table[slot].atrlen && (sw = reset_pcsc_reader (slot))) return sw; if (pininfo->mode != 1) return SW_NOT_SUPPORTED; if (pininfo->padlen != 0) return SW_NOT_SUPPORTED; if (!pininfo->minlen) pininfo->minlen = 1; if (!pininfo->maxlen) pininfo->maxlen = 25; /* Note that the 25 is the maximum value the SPR532 allows. */ if (pininfo->minlen < 1 || pininfo->minlen > 25 || pininfo->maxlen < 1 || pininfo->maxlen > 25 || pininfo->minlen > pininfo->maxlen) return SW_HOST_INV_VALUE; pin_verify = xtrymalloc (len); if (!pin_verify) return SW_HOST_OUT_OF_CORE; pin_verify[0] = 0x00; /* bTimerOut */ pin_verify[1] = 0x00; /* bTimerOut2 */ pin_verify[2] = 0x82; /* bmFormatString: Byte, pos=0, left, ASCII. */ pin_verify[3] = 0x00; /* bmPINBlockString */ pin_verify[4] = 0x00; /* bmPINLengthFormat */ pin_verify[5] = pininfo->maxlen; /* wPINMaxExtraDigit */ pin_verify[6] = pininfo->minlen; /* wPINMaxExtraDigit */ pin_verify[7] = 0x02; /* bEntryValidationCondition: Validation key pressed */ if (pininfo->minlen && pininfo->maxlen && pininfo->minlen == pininfo->maxlen) pin_verify[7] |= 0x01; /* Max size reached. */ pin_verify[8] = 0xff; /* bNumberMessage: Default */ pin_verify[9] = 0x09; /* wLangId: 0x0409: US English */ pin_verify[10] = 0x04; /* wLangId: 0x0409: US English */ pin_verify[11] = 0x00; /* bMsgIndex */ pin_verify[12] = 0x00; /* bTeoPrologue[0] */ pin_verify[13] = 0x00; /* bTeoPrologue[1] */ pin_verify[14] = 0x00; /* bTeoPrologue[2] */ pin_verify[15] = 0x05; /* ulDataLength */ pin_verify[16] = 0x00; /* ulDataLength */ pin_verify[17] = 0x00; /* ulDataLength */ pin_verify[18] = 0x00; /* ulDataLength */ pin_verify[19] = class; /* abData[0] */ pin_verify[20] = ins; /* abData[1] */ pin_verify[21] = p0; /* abData[2] */ pin_verify[22] = p1; /* abData[3] */ pin_verify[23] = 0x00; /* abData[4] */ if (DBG_CARD_IO) log_debug ("send secure: c=%02X i=%02X p1=%02X p2=%02X len=%d pinmax=%d\n", class, ins, p0, p1, len, pininfo->maxlen); sw = control_pcsc (slot, reader_table[slot].pcsc.verify_ioctl, pin_verify, len, result, &resultlen); xfree (pin_verify); if (sw || resultlen < 2) { log_error ("control_pcsc failed: %d\n", sw); return sw? sw: SW_HOST_INCOMPLETE_CARD_RESPONSE; } sw = (result[resultlen-2] << 8) | result[resultlen-1]; if (DBG_CARD_IO) log_debug (" response: sw=%04X datalen=%d\n", sw, (unsigned int)resultlen); return sw; } #define PIN_MODIFY_STRUCTURE_SIZE 29 static int pcsc_keypad_modify (int slot, int class, int ins, int p0, int p1, struct pininfo_s *pininfo) { int sw; unsigned char *pin_modify; int len = PIN_MODIFY_STRUCTURE_SIZE; unsigned char result[2]; size_t resultlen = 2; if (!reader_table[slot].atrlen && (sw = reset_pcsc_reader (slot))) return sw; if (pininfo->mode != 1) return SW_NOT_SUPPORTED; if (pininfo->padlen != 0) return SW_NOT_SUPPORTED; if (!pininfo->minlen) pininfo->minlen = 1; if (!pininfo->maxlen) pininfo->maxlen = 25; /* Note that the 25 is the maximum value the SPR532 allows. */ if (pininfo->minlen < 1 || pininfo->minlen > 25 || pininfo->maxlen < 1 || pininfo->maxlen > 25 || pininfo->minlen > pininfo->maxlen) return SW_HOST_INV_VALUE; pin_modify = xtrymalloc (len); if (!pin_modify) return SW_HOST_OUT_OF_CORE; pin_modify[0] = 0x00; /* bTimerOut */ pin_modify[1] = 0x00; /* bTimerOut2 */ pin_modify[2] = 0x82; /* bmFormatString: Byte, pos=0, left, ASCII. */ pin_modify[3] = 0x00; /* bmPINBlockString */ pin_modify[4] = 0x00; /* bmPINLengthFormat */ pin_modify[5] = 0x00; /* bInsertionOffsetOld */ pin_modify[6] = 0x00; /* bInsertionOffsetNew */ pin_modify[7] = pininfo->maxlen; /* wPINMaxExtraDigit */ pin_modify[8] = pininfo->minlen; /* wPINMaxExtraDigit */ pin_modify[9] = (p0 == 0 ? 0x03 : 0x01); /* bConfirmPIN * 0x00: new PIN once * 0x01: new PIN twice (confirmation) * 0x02: old PIN and new PIN once * 0x03: old PIN and new PIN twice (confirmation) */ pin_modify[10] = 0x02; /* bEntryValidationCondition: Validation key pressed */ if (pininfo->minlen && pininfo->maxlen && pininfo->minlen == pininfo->maxlen) pin_modify[10] |= 0x01; /* Max size reached. */ pin_modify[11] = 0xff; /* bNumberMessage: Default */ pin_modify[12] = 0x09; /* wLangId: 0x0409: US English */ pin_modify[13] = 0x04; /* wLangId: 0x0409: US English */ pin_modify[14] = 0x00; /* bMsgIndex1 */ pin_modify[15] = 0x00; /* bMsgIndex2 */ pin_modify[16] = 0x00; /* bMsgIndex3 */ pin_modify[17] = 0x00; /* bTeoPrologue[0] */ pin_modify[18] = 0x00; /* bTeoPrologue[1] */ pin_modify[19] = 0x00; /* bTeoPrologue[2] */ pin_modify[20] = 0x05; /* ulDataLength */ pin_modify[21] = 0x00; /* ulDataLength */ pin_modify[22] = 0x00; /* ulDataLength */ pin_modify[23] = 0x00; /* ulDataLength */ pin_modify[24] = class; /* abData[0] */ pin_modify[25] = ins; /* abData[1] */ pin_modify[26] = p0; /* abData[2] */ pin_modify[27] = p1; /* abData[3] */ pin_modify[28] = 0x00; /* abData[4] */ if (DBG_CARD_IO) log_debug ("send secure: c=%02X i=%02X p1=%02X p2=%02X len=%d pinmax=%d\n", class, ins, p0, p1, len, (int)pininfo->maxlen); sw = control_pcsc (slot, reader_table[slot].pcsc.modify_ioctl, pin_modify, len, result, &resultlen); xfree (pin_modify); if (sw || resultlen < 2) { log_error ("control_pcsc failed: %d\n", sw); return sw? sw : SW_HOST_INCOMPLETE_CARD_RESPONSE; } sw = (result[resultlen-2] << 8) | result[resultlen-1]; if (DBG_CARD_IO) log_debug (" response: sw=%04X datalen=%d\n", sw, (unsigned int)resultlen); return sw; } #ifdef HAVE_LIBUSB /* Internal CCID driver interface. */ static void dump_ccid_reader_status (int slot) { log_info ("reader slot %d: using ccid driver\n", slot); } static int close_ccid_reader (int slot) { ccid_close_reader (reader_table[slot].ccid.handle); reader_table[slot].used = 0; return 0; } static int shutdown_ccid_reader (int slot) { ccid_shutdown_reader (reader_table[slot].ccid.handle); return 0; } static int reset_ccid_reader (int slot) { int err; reader_table_t slotp = reader_table + slot; unsigned char atr[33]; size_t atrlen; err = ccid_get_atr (slotp->ccid.handle, atr, sizeof atr, &atrlen); if (err) return err; /* If the reset was successful, update the ATR. */ assert (sizeof slotp->atr >= sizeof atr); slotp->atrlen = atrlen; memcpy (slotp->atr, atr, atrlen); dump_reader_status (slot); return 0; } static int set_progress_cb_ccid_reader (int slot, gcry_handler_progress_t cb, void *cb_arg) { reader_table_t slotp = reader_table + slot; return ccid_set_progress_cb (slotp->ccid.handle, cb, cb_arg); } static int get_status_ccid (int slot, unsigned int *status) { int rc; int bits; rc = ccid_slot_status (reader_table[slot].ccid.handle, &bits); if (rc) return rc; if (bits == 0) *status = (APDU_CARD_USABLE|APDU_CARD_PRESENT|APDU_CARD_ACTIVE); else if (bits == 1) *status = APDU_CARD_PRESENT; else *status = 0; return 0; } /* Actually send the APDU of length APDULEN to SLOT and return a maximum of *BUFLEN data in BUFFER, the actual returned size will be set to BUFLEN. Returns: Internal CCID driver error code. */ static int send_apdu_ccid (int slot, unsigned char *apdu, size_t apdulen, unsigned char *buffer, size_t *buflen, struct pininfo_s *pininfo) { long err; size_t maxbuflen; /* If we don't have an ATR, we need to reset the reader first. */ if (!reader_table[slot].atrlen && (err = reset_ccid_reader (slot))) return err; if (DBG_CARD_IO) log_printhex (" raw apdu:", apdu, apdulen); maxbuflen = *buflen; if (pininfo) err = ccid_transceive_secure (reader_table[slot].ccid.handle, apdu, apdulen, pininfo->mode, pininfo->minlen, pininfo->maxlen, pininfo->padlen, buffer, maxbuflen, buflen); else err = ccid_transceive (reader_table[slot].ccid.handle, apdu, apdulen, buffer, maxbuflen, buflen); if (err) log_error ("ccid_transceive failed: (0x%lx)\n", err); return err; } /* Check whether the CCID reader supports the ISO command code COMMAND on the keypad. Return 0 on success. For a description of the pin parameters, see ccid-driver.c */ static int check_ccid_keypad (int slot, int command, int pin_mode, int pinlen_min, int pinlen_max, int pin_padlen) { unsigned char apdu[] = { 0, 0, 0, 0x81 }; apdu[1] = command; return ccid_transceive_secure (reader_table[slot].ccid.handle, apdu, sizeof apdu, pin_mode, pinlen_min, pinlen_max, pin_padlen, NULL, 0, NULL); } static int ccid_keypad_operation (int slot, int class, int ins, int p0, int p1, struct pininfo_s *pininfo) { unsigned char apdu[4]; int err, sw; unsigned char result[2]; size_t resultlen = 2; apdu[0] = class; apdu[1] = ins; apdu[2] = p0; apdu[3] = p1; err = ccid_transceive_secure (reader_table[slot].ccid.handle, apdu, sizeof apdu, pininfo->mode, pininfo->minlen, pininfo->maxlen, pininfo->padlen, result, 2, &resultlen); if (err) return err; if (resultlen < 2) return SW_HOST_INCOMPLETE_CARD_RESPONSE; sw = (result[resultlen-2] << 8) | result[resultlen-1]; return sw; } /* Open the reader and try to read an ATR. */ static int open_ccid_reader (const char *portstr) { int err; int slot; reader_table_t slotp; slot = new_reader_slot (); if (slot == -1) return -1; slotp = reader_table + slot; err = ccid_open_reader (&slotp->ccid.handle, portstr); if (err) { slotp->used = 0; unlock_slot (slot); return -1; } err = ccid_get_atr (slotp->ccid.handle, slotp->atr, sizeof slotp->atr, &slotp->atrlen); if (err) { slotp->atrlen = 0; err = 0; } else { /* If we got to here we know that a card is present and usable. Thus remember this. */ reader_table[slot].last_status = (APDU_CARD_USABLE | APDU_CARD_PRESENT | APDU_CARD_ACTIVE); } reader_table[slot].close_reader = close_ccid_reader; reader_table[slot].shutdown_reader = shutdown_ccid_reader; reader_table[slot].reset_reader = reset_ccid_reader; reader_table[slot].get_status_reader = get_status_ccid; reader_table[slot].send_apdu_reader = send_apdu_ccid; reader_table[slot].check_keypad = check_ccid_keypad; reader_table[slot].dump_status_reader = dump_ccid_reader_status; reader_table[slot].set_progress_cb = set_progress_cb_ccid_reader; reader_table[slot].keypad_verify = ccid_keypad_operation; reader_table[slot].keypad_modify = ccid_keypad_operation; /* Our CCID reader code does not support T=0 at all, thus reset the flag. */ reader_table[slot].is_t0 = 0; dump_reader_status (slot); unlock_slot (slot); return slot; } #endif /* HAVE_LIBUSB */ #ifdef USE_G10CODE_RAPDU /* The Remote APDU Interface. This uses the Remote APDU protocol to contact a reader. The port number is actually an index into the list of ports as returned via the protocol. */ static int rapdu_status_to_sw (int status) { int rc; switch (status) { case RAPDU_STATUS_SUCCESS: rc = 0; break; case RAPDU_STATUS_INVCMD: case RAPDU_STATUS_INVPROT: case RAPDU_STATUS_INVSEQ: case RAPDU_STATUS_INVCOOKIE: case RAPDU_STATUS_INVREADER: rc = SW_HOST_INV_VALUE; break; case RAPDU_STATUS_TIMEOUT: rc = SW_HOST_CARD_IO_ERROR; break; case RAPDU_STATUS_CARDIO: rc = SW_HOST_CARD_IO_ERROR; break; case RAPDU_STATUS_NOCARD: rc = SW_HOST_NO_CARD; break; case RAPDU_STATUS_CARDCHG: rc = SW_HOST_NO_CARD; break; case RAPDU_STATUS_BUSY: rc = SW_HOST_BUSY; break; case RAPDU_STATUS_NEEDRESET: rc = SW_HOST_CARD_INACTIVE; break; default: rc = SW_HOST_GENERAL_ERROR; break; } return rc; } static int close_rapdu_reader (int slot) { rapdu_release (reader_table[slot].rapdu.handle); reader_table[slot].used = 0; return 0; } static int reset_rapdu_reader (int slot) { int err; reader_table_t slotp; rapdu_msg_t msg = NULL; slotp = reader_table + slot; err = rapdu_send_cmd (slotp->rapdu.handle, RAPDU_CMD_RESET); if (err) { log_error ("sending rapdu command RESET failed: %s\n", err < 0 ? strerror (errno): rapdu_strerror (err)); rapdu_msg_release (msg); return rapdu_status_to_sw (err); } err = rapdu_read_msg (slotp->rapdu.handle, &msg); if (err) { log_error ("receiving rapdu message failed: %s\n", err < 0 ? strerror (errno): rapdu_strerror (err)); rapdu_msg_release (msg); return rapdu_status_to_sw (err); } if (msg->cmd != RAPDU_STATUS_SUCCESS || !msg->datalen) { int sw = rapdu_status_to_sw (msg->cmd); log_error ("rapdu command RESET failed: %s\n", rapdu_strerror (msg->cmd)); rapdu_msg_release (msg); return sw; } if (msg->datalen > DIM (slotp->atr)) { log_error ("ATR returned by the RAPDU layer is too large\n"); rapdu_msg_release (msg); return SW_HOST_INV_VALUE; } slotp->atrlen = msg->datalen; memcpy (slotp->atr, msg->data, msg->datalen); rapdu_msg_release (msg); return 0; } static int my_rapdu_get_status (int slot, unsigned int *status) { int err; reader_table_t slotp; rapdu_msg_t msg = NULL; int oldslot; slotp = reader_table + slot; oldslot = rapdu_set_reader (slotp->rapdu.handle, slot); err = rapdu_send_cmd (slotp->rapdu.handle, RAPDU_CMD_GET_STATUS); rapdu_set_reader (slotp->rapdu.handle, oldslot); if (err) { log_error ("sending rapdu command GET_STATUS failed: %s\n", err < 0 ? strerror (errno): rapdu_strerror (err)); return rapdu_status_to_sw (err); } err = rapdu_read_msg (slotp->rapdu.handle, &msg); if (err) { log_error ("receiving rapdu message failed: %s\n", err < 0 ? strerror (errno): rapdu_strerror (err)); rapdu_msg_release (msg); return rapdu_status_to_sw (err); } if (msg->cmd != RAPDU_STATUS_SUCCESS || !msg->datalen) { int sw = rapdu_status_to_sw (msg->cmd); log_error ("rapdu command GET_STATUS failed: %s\n", rapdu_strerror (msg->cmd)); rapdu_msg_release (msg); return sw; } *status = msg->data[0]; rapdu_msg_release (msg); return 0; } /* Actually send the APDU of length APDULEN to SLOT and return a maximum of *BUFLEN data in BUFFER, the actual returned size will be set to BUFLEN. Returns: APDU error code. */ static int my_rapdu_send_apdu (int slot, unsigned char *apdu, size_t apdulen, unsigned char *buffer, size_t *buflen, struct pininfo_s *pininfo) { int err; reader_table_t slotp; rapdu_msg_t msg = NULL; size_t maxlen = *buflen; slotp = reader_table + slot; *buflen = 0; if (DBG_CARD_IO) log_printhex (" APDU_data:", apdu, apdulen); if (apdulen < 4) { log_error ("rapdu_send_apdu: APDU is too short\n"); return SW_HOST_INV_VALUE; } err = rapdu_send_apdu (slotp->rapdu.handle, apdu, apdulen); if (err) { log_error ("sending rapdu command APDU failed: %s\n", err < 0 ? strerror (errno): rapdu_strerror (err)); rapdu_msg_release (msg); return rapdu_status_to_sw (err); } err = rapdu_read_msg (slotp->rapdu.handle, &msg); if (err) { log_error ("receiving rapdu message failed: %s\n", err < 0 ? strerror (errno): rapdu_strerror (err)); rapdu_msg_release (msg); return rapdu_status_to_sw (err); } if (msg->cmd != RAPDU_STATUS_SUCCESS || !msg->datalen) { int sw = rapdu_status_to_sw (msg->cmd); log_error ("rapdu command APDU failed: %s\n", rapdu_strerror (msg->cmd)); rapdu_msg_release (msg); return sw; } if (msg->datalen > maxlen) { log_error ("rapdu response apdu too large\n"); rapdu_msg_release (msg); return SW_HOST_INV_VALUE; } *buflen = msg->datalen; memcpy (buffer, msg->data, msg->datalen); rapdu_msg_release (msg); return 0; } static int open_rapdu_reader (int portno, const unsigned char *cookie, size_t length, int (*readfnc) (void *opaque, void *buffer, size_t size), void *readfnc_value, int (*writefnc) (void *opaque, const void *buffer, size_t size), void *writefnc_value, void (*closefnc) (void *opaque), void *closefnc_value) { int err; int slot; reader_table_t slotp; rapdu_msg_t msg = NULL; slot = new_reader_slot (); if (slot == -1) return -1; slotp = reader_table + slot; slotp->rapdu.handle = rapdu_new (); if (!slotp->rapdu.handle) { slotp->used = 0; unlock_slot (slot); return -1; } rapdu_set_reader (slotp->rapdu.handle, portno); rapdu_set_iofunc (slotp->rapdu.handle, readfnc, readfnc_value, writefnc, writefnc_value, closefnc, closefnc_value); rapdu_set_cookie (slotp->rapdu.handle, cookie, length); /* First try to get the current ATR, but if the card is inactive issue a reset instead. */ err = rapdu_send_cmd (slotp->rapdu.handle, RAPDU_CMD_GET_ATR); if (err == RAPDU_STATUS_NEEDRESET) err = rapdu_send_cmd (slotp->rapdu.handle, RAPDU_CMD_RESET); if (err) { log_info ("sending rapdu command GET_ATR/RESET failed: %s\n", err < 0 ? strerror (errno): rapdu_strerror (err)); goto failure; } err = rapdu_read_msg (slotp->rapdu.handle, &msg); if (err) { log_info ("receiving rapdu message failed: %s\n", err < 0 ? strerror (errno): rapdu_strerror (err)); goto failure; } if (msg->cmd != RAPDU_STATUS_SUCCESS || !msg->datalen) { log_info ("rapdu command GET ATR failed: %s\n", rapdu_strerror (msg->cmd)); goto failure; } if (msg->datalen > DIM (slotp->atr)) { log_error ("ATR returned by the RAPDU layer is too large\n"); goto failure; } slotp->atrlen = msg->datalen; memcpy (slotp->atr, msg->data, msg->datalen); reader_table[slot].close_reader = close_rapdu_reader; reader_table[slot].reset_reader = reset_rapdu_reader; reader_table[slot].get_status_reader = my_rapdu_get_status; reader_table[slot].send_apdu_reader = my_rapdu_send_apdu; reader_table[slot].check_keypad = NULL; reader_table[slot].dump_status_reader = NULL; reader_table[slot].keypad_verify = NULL; reader_table[slot].keypad_modify = NULL; dump_reader_status (slot); rapdu_msg_release (msg); unlock_slot (slot); return slot; failure: rapdu_msg_release (msg); rapdu_release (slotp->rapdu.handle); slotp->used = 0; unlock_slot (slot); return -1; } #endif /*USE_G10CODE_RAPDU*/ /* Driver Access */ /* Open the reader and return an internal slot number or -1 on error. If PORTSTR is NULL we default to a suitable port (for ctAPI: the first USB reader. For PC/SC the first listed reader). */ int -apdu_open_reader (const char *portstr, int *r_no_service) +apdu_open_reader (const char *portstr) { static int pcsc_api_loaded, ct_api_loaded; - int slot; - - if (r_no_service) - *r_no_service = 0; #ifdef HAVE_LIBUSB if (!opt.disable_ccid) { - int i; + int slot, i; const char *s; slot = open_ccid_reader (portstr); if (slot != -1) return slot; /* got one */ /* If a CCID reader specification has been given, the user does not want a fallback to other drivers. */ if (portstr) for (s=portstr, i=0; *s; s++) if (*s == ':' && (++i == 3)) return -1; } #endif /* HAVE_LIBUSB */ if (opt.ctapi_driver && *opt.ctapi_driver) { int port = portstr? atoi (portstr) : 32768; if (!ct_api_loaded) { void *handle; handle = dlopen (opt.ctapi_driver, RTLD_LAZY); if (!handle) { log_error ("apdu_open_reader: failed to open driver: %s\n", dlerror ()); return -1; } CT_init = dlsym (handle, "CT_init"); CT_data = dlsym (handle, "CT_data"); CT_close = dlsym (handle, "CT_close"); if (!CT_init || !CT_data || !CT_close) { log_error ("apdu_open_reader: invalid CT-API driver\n"); dlclose (handle); return -1; } ct_api_loaded = 1; } return open_ct_reader (port); } /* No ctAPI configured, so lets try the PC/SC API */ if (!pcsc_api_loaded) { #ifndef NEED_PCSC_WRAPPER void *handle; handle = dlopen (opt.pcsc_driver, RTLD_LAZY); if (!handle) { log_error ("apdu_open_reader: failed to open driver `%s': %s\n", opt.pcsc_driver, dlerror ()); return -1; } pcsc_establish_context = dlsym (handle, "SCardEstablishContext"); pcsc_release_context = dlsym (handle, "SCardReleaseContext"); pcsc_list_readers = dlsym (handle, "SCardListReaders"); #if defined(_WIN32) || defined(__CYGWIN__) if (!pcsc_list_readers) pcsc_list_readers = dlsym (handle, "SCardListReadersA"); #endif pcsc_get_status_change = dlsym (handle, "SCardGetStatusChange"); #if defined(_WIN32) || defined(__CYGWIN__) if (!pcsc_get_status_change) pcsc_get_status_change = dlsym (handle, "SCardGetStatusChangeA"); #endif pcsc_connect = dlsym (handle, "SCardConnect"); #if defined(_WIN32) || defined(__CYGWIN__) if (!pcsc_connect) pcsc_connect = dlsym (handle, "SCardConnectA"); #endif pcsc_reconnect = dlsym (handle, "SCardReconnect"); #if defined(_WIN32) || defined(__CYGWIN__) if (!pcsc_reconnect) pcsc_reconnect = dlsym (handle, "SCardReconnectA"); #endif pcsc_disconnect = dlsym (handle, "SCardDisconnect"); pcsc_status = dlsym (handle, "SCardStatus"); #if defined(_WIN32) || defined(__CYGWIN__) if (!pcsc_status) pcsc_status = dlsym (handle, "SCardStatusA"); #endif pcsc_begin_transaction = dlsym (handle, "SCardBeginTransaction"); pcsc_end_transaction = dlsym (handle, "SCardEndTransaction"); pcsc_transmit = dlsym (handle, "SCardTransmit"); pcsc_set_timeout = dlsym (handle, "SCardSetTimeout"); pcsc_control = dlsym (handle, "SCardControl"); if (!pcsc_establish_context || !pcsc_release_context || !pcsc_list_readers || !pcsc_get_status_change || !pcsc_connect || !pcsc_reconnect || !pcsc_disconnect || !pcsc_status || !pcsc_begin_transaction || !pcsc_end_transaction || !pcsc_transmit || !pcsc_control /* || !pcsc_set_timeout */) { /* Note that set_timeout is currently not used and also not available under Windows. */ log_error ("apdu_open_reader: invalid PC/SC driver " "(%d%d%d%d%d%d%d%d%d%d%d%d%d)\n", !!pcsc_establish_context, !!pcsc_release_context, !!pcsc_list_readers, !!pcsc_get_status_change, !!pcsc_connect, !!pcsc_reconnect, !!pcsc_disconnect, !!pcsc_status, !!pcsc_begin_transaction, !!pcsc_end_transaction, !!pcsc_transmit, !!pcsc_set_timeout, !!pcsc_control ); dlclose (handle); return -1; } #endif /*!NEED_PCSC_WRAPPER*/ pcsc_api_loaded = 1; } - slot = open_pcsc_reader (portstr); - if (slot == -1 && r_no_service && pcsc_no_service) - *r_no_service = 1; - - return slot; + return open_pcsc_reader (portstr); } /* Open an remote reader and return an internal slot number or -1 on error. This function is an alternative to apdu_open_reader and used with remote readers only. Note that the supplied CLOSEFNC will only be called once and the slot will not be valid afther this. If PORTSTR is NULL we default to the first availabe port. */ int apdu_open_remote_reader (const char *portstr, const unsigned char *cookie, size_t length, int (*readfnc) (void *opaque, void *buffer, size_t size), void *readfnc_value, int (*writefnc) (void *opaque, const void *buffer, size_t size), void *writefnc_value, void (*closefnc) (void *opaque), void *closefnc_value) { #ifdef USE_G10CODE_RAPDU return open_rapdu_reader (portstr? atoi (portstr) : 0, cookie, length, readfnc, readfnc_value, writefnc, writefnc_value, closefnc, closefnc_value); #else (void)portstr; (void)cookie; (void)length; (void)readfnc; (void)readfnc_value; (void)writefnc; (void)writefnc_value; (void)closefnc; (void)closefnc_value; #ifdef _WIN32 errno = ENOENT; #else errno = ENOSYS; #endif return -1; #endif } int apdu_close_reader (int slot) { int sw; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; sw = apdu_disconnect (slot); if (sw) return sw; if (reader_table[slot].close_reader) return reader_table[slot].close_reader (slot); return SW_HOST_NOT_SUPPORTED; } /* Function suitable for a cleanup function to close all reader. It should not be used if the reader will be opened again. The reason for implementing this to properly close USB devices so that they will startup the next time without error. */ void apdu_prepare_exit (void) { static int sentinel; int slot; if (!sentinel) { sentinel = 1; for (slot = 0; slot < MAX_READER; slot++) if (reader_table[slot].used) { apdu_disconnect (slot); if (reader_table[slot].close_reader) reader_table[slot].close_reader (slot); reader_table[slot].used = 0; } sentinel = 0; } } /* Shutdown a reader; that is basically the same as a close but keeps the handle ready for later use. A apdu_reset_reader or apdu_connect should be used to get it active again. */ int apdu_shutdown_reader (int slot) { int sw; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; sw = apdu_disconnect (slot); if (sw) return sw; if (reader_table[slot].shutdown_reader) return reader_table[slot].shutdown_reader (slot); return SW_HOST_NOT_SUPPORTED; } /* Enumerate all readers and return information on whether this reader is in use. The caller should start with SLOT set to 0 and increment it with each call until an error is returned. */ int apdu_enum_reader (int slot, int *used) { if (slot < 0 || slot >= MAX_READER) return SW_HOST_NO_DRIVER; *used = reader_table[slot].used; return 0; } /* Connect a card. This is used to power up the card and make sure that an ATR is available. Depending on the reader backend it may return an error for an inactive card or if no card is available. */ int apdu_connect (int slot) { int sw; unsigned int status; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; /* Only if the access method provides a connect function we use it. If not, we expect that the card has been implicitly connected by apdu_open_reader. */ if (reader_table[slot].connect_card) { sw = lock_slot (slot); if (!sw) { sw = reader_table[slot].connect_card (slot); unlock_slot (slot); } } else sw = 0; /* We need to call apdu_get_status_internal, so that the last-status machinery gets setup properly even if a card is inserted while scdaemon is fired up and apdu_get_status has not yet been called. Without that we would force a reset of the card with the next call to apdu_get_status. */ apdu_get_status_internal (slot, 1, 1, &status, NULL); if (sw) ; else if (!(status & APDU_CARD_PRESENT)) sw = SW_HOST_NO_CARD; else if ((status & APDU_CARD_PRESENT) && !(status & APDU_CARD_ACTIVE)) sw = SW_HOST_CARD_INACTIVE; return sw; } int apdu_disconnect (int slot) { int sw; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; if (reader_table[slot].disconnect_card) { sw = lock_slot (slot); if (!sw) { sw = reader_table[slot].disconnect_card (slot); unlock_slot (slot); } } else sw = 0; return sw; } /* Set the progress callback of SLOT to CB and its args to CB_ARG. If CB is NULL the progress callback is removed. */ int apdu_set_progress_cb (int slot, gcry_handler_progress_t cb, void *cb_arg) { int sw; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; if (reader_table[slot].set_progress_cb) { sw = lock_slot (slot); if (!sw) { sw = reader_table[slot].set_progress_cb (slot, cb, cb_arg); unlock_slot (slot); } } else sw = 0; return sw; } /* Do a reset for the card in reader at SLOT. */ int apdu_reset (int slot) { int sw; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; if ((sw = lock_slot (slot))) return sw; reader_table[slot].last_status = 0; if (reader_table[slot].reset_reader) sw = reader_table[slot].reset_reader (slot); if (!sw) { /* If we got to here we know that a card is present and usable. Thus remember this. */ reader_table[slot].last_status = (APDU_CARD_USABLE | APDU_CARD_PRESENT | APDU_CARD_ACTIVE); } unlock_slot (slot); return sw; } /* Activate a card if it has not yet been done. This is a kind of reset-if-required. It is useful to test for presence of a card before issuing a bunch of apdu commands. It does not wait on a locked card. */ int apdu_activate (int slot) { int sw; unsigned int s; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; if ((sw = trylock_slot (slot))) return sw; if (reader_table[slot].get_status_reader) sw = reader_table[slot].get_status_reader (slot, &s); if (!sw) { if (!(s & 2)) /* Card not present. */ sw = SW_HOST_NO_CARD; else if ( ((s & 2) && !(s & 4)) || !reader_table[slot].atrlen ) { /* We don't have an ATR or a card is present though inactive: do a reset now. */ if (reader_table[slot].reset_reader) { reader_table[slot].last_status = 0; sw = reader_table[slot].reset_reader (slot); if (!sw) { /* If we got to here we know that a card is present and usable. Thus remember this. */ reader_table[slot].last_status = (APDU_CARD_USABLE | APDU_CARD_PRESENT | APDU_CARD_ACTIVE); } } } } unlock_slot (slot); return sw; } unsigned char * apdu_get_atr (int slot, size_t *atrlen) { unsigned char *buf; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return NULL; if (!reader_table[slot].atrlen) return NULL; buf = xtrymalloc (reader_table[slot].atrlen); if (!buf) return NULL; memcpy (buf, reader_table[slot].atr, reader_table[slot].atrlen); *atrlen = reader_table[slot].atrlen; return buf; } /* Retrieve the status for SLOT. The function does only wait for the card to become available if HANG is set to true. On success the bits in STATUS will be set to APDU_CARD_USABLE (bit 0) = card present and usable APDU_CARD_PRESENT (bit 1) = card present APDU_CARD_ACTIVE (bit 2) = card active (bit 3) = card access locked [not yet implemented] For must applications, testing bit 0 is sufficient. CHANGED will receive the value of the counter tracking the number of card insertions. This value may be used to detect a card change. */ static int apdu_get_status_internal (int slot, int hang, int no_atr_reset, unsigned int *status, unsigned int *changed) { int sw; unsigned int s; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; if ((sw = hang? lock_slot (slot) : trylock_slot (slot))) return sw; if (reader_table[slot].get_status_reader) sw = reader_table[slot].get_status_reader (slot, &s); unlock_slot (slot); if (sw) { reader_table[slot].last_status = 0; return sw; } /* Keep track of changes. */ if (s != reader_table[slot].last_status || !reader_table[slot].any_status ) { reader_table[slot].change_counter++; /* Make sure that the ATR is invalid so that a reset will be triggered by apdu_activate. */ if (!no_atr_reset) reader_table[slot].atrlen = 0; } reader_table[slot].any_status = 1; reader_table[slot].last_status = s; if (status) *status = s; if (changed) *changed = reader_table[slot].change_counter; return 0; } /* See above for a description. */ int apdu_get_status (int slot, int hang, unsigned int *status, unsigned int *changed) { return apdu_get_status_internal (slot, hang, 0, status, changed); } /* Check whether the reader supports the ISO command code COMMAND on the keypad. Return 0 on success. For a description of the pin parameters, see ccid-driver.c */ int apdu_check_keypad (int slot, int command, int pin_mode, int pinlen_min, int pinlen_max, int pin_padlen) { if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; if (reader_table[slot].check_keypad) return reader_table[slot].check_keypad (slot, command, pin_mode, pinlen_min, pinlen_max, pin_padlen); else return SW_HOST_NOT_SUPPORTED; } int apdu_keypad_verify (int slot, int class, int ins, int p0, int p1, int pin_mode, int pinlen_min, int pinlen_max, int pin_padlen) { struct pininfo_s pininfo; pininfo.mode = pin_mode; pininfo.minlen = pinlen_min; pininfo.maxlen = pinlen_max; pininfo.padlen = pin_padlen; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; if (reader_table[slot].keypad_verify) return reader_table[slot].keypad_verify (slot, class, ins, p0, p1, &pininfo); else return SW_HOST_NOT_SUPPORTED; } int apdu_keypad_modify (int slot, int class, int ins, int p0, int p1, int pin_mode, int pinlen_min, int pinlen_max, int pin_padlen) { struct pininfo_s pininfo; pininfo.mode = pin_mode; pininfo.minlen = pinlen_min; pininfo.maxlen = pinlen_max; pininfo.padlen = pin_padlen; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; if (reader_table[slot].keypad_modify) return reader_table[slot].keypad_modify (slot, class, ins, p0, p1, &pininfo); else return SW_HOST_NOT_SUPPORTED; } /* Dispatcher for the actual send_apdu function. Note, that this function should be called in locked state. */ static int send_apdu (int slot, unsigned char *apdu, size_t apdulen, unsigned char *buffer, size_t *buflen, struct pininfo_s *pininfo) { if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; if (reader_table[slot].send_apdu_reader) return reader_table[slot].send_apdu_reader (slot, apdu, apdulen, buffer, buflen, pininfo); else return SW_HOST_NOT_SUPPORTED; } /* Core APDU tranceiver function. Parameters are described at apdu_send_le with the exception of PININFO which indicates keypad related operations if not NULL. If EXTENDED_MODE is not 0 command chaining or extended length will be used according to these values: n < 0 := Use command chaining with the data part limited to -n in each chunk. If -1 is used a default value is used. n == 0 := No extended mode or command chaining. n == 1 := Use extended length for input and output without a length limit. n > 1 := Use extended length with up to N bytes. */ static int send_le (int slot, int class, int ins, int p0, int p1, int lc, const char *data, int le, unsigned char **retbuf, size_t *retbuflen, struct pininfo_s *pininfo, int extended_mode) { #define SHORT_RESULT_BUFFER_SIZE 258 /* We allocate 8 extra bytes as a safety margin towards a driver bug. */ unsigned char short_result_buffer[SHORT_RESULT_BUFFER_SIZE+10]; unsigned char *result_buffer = NULL; size_t result_buffer_size; unsigned char *result; size_t resultlen; unsigned char short_apdu_buffer[5+256+1]; unsigned char *apdu_buffer = NULL; size_t apdu_buffer_size; unsigned char *apdu; size_t apdulen; int sw; long rc; /* We need a long here due to PC/SC. */ int did_exact_length_hack = 0; int use_chaining = 0; int use_extended_length = 0; int lc_chunk; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; if (DBG_CARD_IO) log_debug ("send apdu: c=%02X i=%02X p1=%02X p2=%02X lc=%d le=%d em=%d\n", class, ins, p0, p1, lc, le, extended_mode); if (lc != -1 && (lc > 255 || lc < 0)) { /* Data does not fit into an APDU. What we do now depends on the EXTENDED_MODE parameter. */ if (!extended_mode) return SW_WRONG_LENGTH; /* No way to send such an APDU. */ else if (extended_mode > 0) use_extended_length = 1; else if (extended_mode < 0) { /* Send APDU using chaining mode. */ if (lc > 16384) return SW_WRONG_LENGTH; /* Sanity check. */ if ((class&0xf0) != 0) return SW_HOST_INV_VALUE; /* Upper 4 bits need to be 0. */ use_chaining = extended_mode == -1? 255 : -extended_mode; use_chaining &= 0xff; } else return SW_HOST_INV_VALUE; } else if (lc == -1 && extended_mode > 0) use_extended_length = 1; if (le != -1 && (le > (extended_mode > 0? 255:256) || le < 0)) { /* Expected Data does not fit into an APDU. What we do now depends on the EXTENDED_MODE parameter. Note that a check for command chaining does not make sense because we are looking at Le. */ if (!extended_mode) return SW_WRONG_LENGTH; /* No way to send such an APDU. */ else if (use_extended_length) ; /* We are already using extended length. */ else if (extended_mode > 0) use_extended_length = 1; else return SW_HOST_INV_VALUE; } if ((!data && lc != -1) || (data && lc == -1)) return SW_HOST_INV_VALUE; if (use_extended_length) { if (reader_table[slot].is_t0) return SW_HOST_NOT_SUPPORTED; /* Space for: cls/ins/p1/p2+Z+2_byte_Lc+Lc+2_byte_Le. */ apdu_buffer_size = 4 + 1 + (lc >= 0? (2+lc):0) + 2; apdu_buffer = xtrymalloc (apdu_buffer_size + 10); if (!apdu_buffer) return SW_HOST_OUT_OF_CORE; apdu = apdu_buffer; } else { apdu_buffer_size = sizeof short_apdu_buffer; apdu = short_apdu_buffer; } if (use_extended_length && (le > 256 || le < 0)) { result_buffer_size = le < 0? 4096 : le; result_buffer = xtrymalloc (result_buffer_size + 10); if (!result_buffer) { xfree (apdu_buffer); return SW_HOST_OUT_OF_CORE; } result = result_buffer; } else { result_buffer_size = SHORT_RESULT_BUFFER_SIZE; result = short_result_buffer; } #undef SHORT_RESULT_BUFFER_SIZE if ((sw = lock_slot (slot))) { xfree (apdu_buffer); xfree (result_buffer); return sw; } do { if (use_extended_length) { use_chaining = 0; apdulen = 0; apdu[apdulen++] = class; apdu[apdulen++] = ins; apdu[apdulen++] = p0; apdu[apdulen++] = p1; apdu[apdulen++] = 0; /* Z byte: Extended length marker. */ if (lc >= 0) { apdu[apdulen++] = ((lc >> 8) & 0xff); apdu[apdulen++] = (lc & 0xff); memcpy (apdu+apdulen, data, lc); data += lc; apdulen += lc; } if (le != -1) { apdu[apdulen++] = ((le >> 8) & 0xff); apdu[apdulen++] = (le & 0xff); } } else { apdulen = 0; apdu[apdulen] = class; if (use_chaining && lc > 255) { apdu[apdulen] |= 0x10; assert (use_chaining < 256); lc_chunk = use_chaining; lc -= use_chaining; } else { use_chaining = 0; lc_chunk = lc; } apdulen++; apdu[apdulen++] = ins; apdu[apdulen++] = p0; apdu[apdulen++] = p1; if (lc_chunk != -1) { apdu[apdulen++] = lc_chunk; memcpy (apdu+apdulen, data, lc_chunk); data += lc_chunk; apdulen += lc_chunk; /* T=0 does not allow the use of Lc together with Le; thus disable Le in this case. */ if (reader_table[slot].is_t0) le = -1; } if (le != -1 && !use_chaining) apdu[apdulen++] = le; /* Truncation is okay (0 means 256). */ } exact_length_hack: /* As a safeguard don't pass any garbage to the driver. */ assert (apdulen <= apdu_buffer_size); memset (apdu+apdulen, 0, apdu_buffer_size - apdulen); resultlen = result_buffer_size; rc = send_apdu (slot, apdu, apdulen, result, &resultlen, pininfo); if (rc || resultlen < 2) { log_info ("apdu_send_simple(%d) failed: %s\n", slot, apdu_strerror (rc)); unlock_slot (slot); xfree (apdu_buffer); xfree (result_buffer); return rc? rc : SW_HOST_INCOMPLETE_CARD_RESPONSE; } sw = (result[resultlen-2] << 8) | result[resultlen-1]; if (!use_extended_length && !did_exact_length_hack && SW_EXACT_LENGTH_P (sw)) { apdu[apdulen-1] = (sw & 0x00ff); did_exact_length_hack = 1; goto exact_length_hack; } } while (use_chaining && sw == SW_SUCCESS); if (apdu_buffer) { xfree (apdu_buffer); apdu_buffer = NULL; apdu_buffer_size = 0; } /* Store away the returned data but strip the statusword. */ resultlen -= 2; if (DBG_CARD_IO) { log_debug (" response: sw=%04X datalen=%d\n", sw, (unsigned int)resultlen); if ( !retbuf && (sw == SW_SUCCESS || (sw & 0xff00) == SW_MORE_DATA)) log_printhex (" dump: ", result, resultlen); } if (sw == SW_SUCCESS || sw == SW_EOF_REACHED) { if (retbuf) { *retbuf = xtrymalloc (resultlen? resultlen : 1); if (!*retbuf) { unlock_slot (slot); xfree (result_buffer); return SW_HOST_OUT_OF_CORE; } *retbuflen = resultlen; memcpy (*retbuf, result, resultlen); } } else if ((sw & 0xff00) == SW_MORE_DATA) { unsigned char *p = NULL, *tmp; size_t bufsize = 4096; /* It is likely that we need to return much more data, so we start off with a large buffer. */ if (retbuf) { *retbuf = p = xtrymalloc (bufsize); if (!*retbuf) { unlock_slot (slot); xfree (result_buffer); return SW_HOST_OUT_OF_CORE; } assert (resultlen < bufsize); memcpy (p, result, resultlen); p += resultlen; } do { int len = (sw & 0x00ff); if (DBG_CARD_IO) log_debug ("apdu_send_simple(%d): %d more bytes available\n", slot, len); apdu_buffer_size = sizeof short_apdu_buffer; apdu = short_apdu_buffer; apdulen = 0; apdu[apdulen++] = class; apdu[apdulen++] = 0xC0; apdu[apdulen++] = 0; apdu[apdulen++] = 0; apdu[apdulen++] = len; assert (apdulen <= apdu_buffer_size); memset (apdu+apdulen, 0, apdu_buffer_size - apdulen); resultlen = result_buffer_size; rc = send_apdu (slot, apdu, apdulen, result, &resultlen, NULL); if (rc || resultlen < 2) { log_error ("apdu_send_simple(%d) for get response failed: %s\n", slot, apdu_strerror (rc)); unlock_slot (slot); xfree (result_buffer); return rc? rc : SW_HOST_INCOMPLETE_CARD_RESPONSE; } sw = (result[resultlen-2] << 8) | result[resultlen-1]; resultlen -= 2; if (DBG_CARD_IO) { log_debug (" more: sw=%04X datalen=%d\n", sw, (unsigned int)resultlen); if (!retbuf && (sw==SW_SUCCESS || (sw&0xff00)==SW_MORE_DATA)) log_printhex (" dump: ", result, resultlen); } if ((sw & 0xff00) == SW_MORE_DATA || sw == SW_SUCCESS || sw == SW_EOF_REACHED ) { if (retbuf && resultlen) { if (p - *retbuf + resultlen > bufsize) { bufsize += resultlen > 4096? resultlen: 4096; tmp = xtryrealloc (*retbuf, bufsize); if (!tmp) { unlock_slot (slot); xfree (result_buffer); return SW_HOST_OUT_OF_CORE; } p = tmp + (p - *retbuf); *retbuf = tmp; } memcpy (p, result, resultlen); p += resultlen; } } else log_info ("apdu_send_simple(%d) " "got unexpected status %04X from get response\n", slot, sw); } while ((sw & 0xff00) == SW_MORE_DATA); if (retbuf) { *retbuflen = p - *retbuf; tmp = xtryrealloc (*retbuf, *retbuflen); if (tmp) *retbuf = tmp; } } unlock_slot (slot); xfree (result_buffer); if (DBG_CARD_IO && retbuf && sw == SW_SUCCESS) log_printhex (" dump: ", *retbuf, *retbuflen); return sw; } /* Send an APDU to the card in SLOT. The APDU is created from all given parameters: CLASS, INS, P0, P1, LC, DATA, LE. A value of -1 for LC won't sent this field and the data field; in this case DATA must also be passed as NULL. If EXTENDED_MODE is not 0 command chaining or extended length will be used; see send_le for details. The return value is the status word or -1 for an invalid SLOT or other non card related error. If RETBUF is not NULL, it will receive an allocated buffer with the returned data. The length of that data will be put into *RETBUFLEN. The caller is reponsible for releasing the buffer even in case of errors. */ int apdu_send_le(int slot, int extended_mode, int class, int ins, int p0, int p1, int lc, const char *data, int le, unsigned char **retbuf, size_t *retbuflen) { return send_le (slot, class, ins, p0, p1, lc, data, le, retbuf, retbuflen, NULL, extended_mode); } /* Send an APDU to the card in SLOT. The APDU is created from all given parameters: CLASS, INS, P0, P1, LC, DATA. A value of -1 for LC won't sent this field and the data field; in this case DATA must also be passed as NULL. If EXTENDED_MODE is not 0 command chaining or extended length will be used; see send_le for details. The return value is the status word or -1 for an invalid SLOT or other non card related error. If RETBUF is not NULL, it will receive an allocated buffer with the returned data. The length of that data will be put into *RETBUFLEN. The caller is reponsible for releasing the buffer even in case of errors. */ int apdu_send (int slot, int extended_mode, int class, int ins, int p0, int p1, int lc, const char *data, unsigned char **retbuf, size_t *retbuflen) { return send_le (slot, class, ins, p0, p1, lc, data, 256, retbuf, retbuflen, NULL, extended_mode); } /* Send an APDU to the card in SLOT. The APDU is created from all given parameters: CLASS, INS, P0, P1, LC, DATA. A value of -1 for LC won't sent this field and the data field; in this case DATA must also be passed as NULL. If EXTENDED_MODE is not 0 command chaining or extended length will be used; see send_le for details. The return value is the status word or -1 for an invalid SLOT or other non card related error. No data will be returned. */ int apdu_send_simple (int slot, int extended_mode, int class, int ins, int p0, int p1, int lc, const char *data) { return send_le (slot, class, ins, p0, p1, lc, data, -1, NULL, NULL, NULL, extended_mode); } /* Same as apdu_send_simple but uses the keypad of the reader. */ int apdu_send_simple_kp (int slot, int class, int ins, int p0, int p1, int lc, const char *data, int pin_mode, int pinlen_min, int pinlen_max, int pin_padlen) { struct pininfo_s pininfo; pininfo.mode = pin_mode; pininfo.minlen = pinlen_min; pininfo.maxlen = pinlen_max; pininfo.padlen = pin_padlen; return send_le (slot, class, ins, p0, p1, lc, data, -1, NULL, NULL, &pininfo, 0); } /* This is a more generic version of the apdu sending routine. It takes an already formatted APDU in APDUDATA or length APDUDATALEN and returns with an APDU including the status word. With HANDLE_MORE set to true this function will handle the MORE DATA status and return all APDUs concatenated with one status word at the end. If EXTENDED_LENGTH is != 0 extended lengths are allowed with a max. result data length of EXTENDED_LENGTH bytes. The function does not return a regular status word but 0 on success. If the slot is locked, the function returns immediately with an error. */ int apdu_send_direct (int slot, size_t extended_length, const unsigned char *apdudata, size_t apdudatalen, int handle_more, unsigned char **retbuf, size_t *retbuflen) { #define SHORT_RESULT_BUFFER_SIZE 258 unsigned char short_result_buffer[SHORT_RESULT_BUFFER_SIZE+10]; unsigned char *result_buffer = NULL; size_t result_buffer_size; unsigned char *result; size_t resultlen; unsigned char short_apdu_buffer[5+256+10]; unsigned char *apdu_buffer = NULL; unsigned char *apdu; size_t apdulen; int sw; long rc; /* we need a long here due to PC/SC. */ int class; if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used ) return SW_HOST_NO_DRIVER; if (apdudatalen > 65535) return SW_HOST_INV_VALUE; if (apdudatalen > sizeof short_apdu_buffer - 5) { apdu_buffer = xtrymalloc (apdudatalen + 5); if (!apdu_buffer) return SW_HOST_OUT_OF_CORE; apdu = apdu_buffer; } else { apdu = short_apdu_buffer; } apdulen = apdudatalen; memcpy (apdu, apdudata, apdudatalen); class = apdulen? *apdu : 0; if (extended_length >= 256 && extended_length <= 65536) { result_buffer_size = extended_length; result_buffer = xtrymalloc (result_buffer_size + 10); if (!result_buffer) { xfree (apdu_buffer); return SW_HOST_OUT_OF_CORE; } result = result_buffer; } else { result_buffer_size = SHORT_RESULT_BUFFER_SIZE; result = short_result_buffer; } #undef SHORT_RESULT_BUFFER_SIZE if ((sw = trylock_slot (slot))) { xfree (apdu_buffer); xfree (result_buffer); return sw; } resultlen = result_buffer_size; rc = send_apdu (slot, apdu, apdulen, result, &resultlen, NULL); xfree (apdu_buffer); apdu_buffer = NULL; if (rc || resultlen < 2) { log_error ("apdu_send_direct(%d) failed: %s\n", slot, apdu_strerror (rc)); unlock_slot (slot); xfree (result_buffer); return rc? rc : SW_HOST_INCOMPLETE_CARD_RESPONSE; } sw = (result[resultlen-2] << 8) | result[resultlen-1]; /* Store away the returned data but strip the statusword. */ resultlen -= 2; if (DBG_CARD_IO) { log_debug (" response: sw=%04X datalen=%d\n", sw, (unsigned int)resultlen); if ( !retbuf && (sw == SW_SUCCESS || (sw & 0xff00) == SW_MORE_DATA)) log_printhex (" dump: ", result, resultlen); } if (handle_more && (sw & 0xff00) == SW_MORE_DATA) { unsigned char *p = NULL, *tmp; size_t bufsize = 4096; /* It is likely that we need to return much more data, so we start off with a large buffer. */ if (retbuf) { *retbuf = p = xtrymalloc (bufsize + 2); if (!*retbuf) { unlock_slot (slot); xfree (result_buffer); return SW_HOST_OUT_OF_CORE; } assert (resultlen < bufsize); memcpy (p, result, resultlen); p += resultlen; } do { int len = (sw & 0x00ff); if (DBG_CARD_IO) log_debug ("apdu_send_direct(%d): %d more bytes available\n", slot, len); apdu = short_apdu_buffer; apdulen = 0; apdu[apdulen++] = class; apdu[apdulen++] = 0xC0; apdu[apdulen++] = 0; apdu[apdulen++] = 0; apdu[apdulen++] = len; memset (apdu+apdulen, 0, sizeof (short_apdu_buffer) - apdulen); resultlen = result_buffer_size; rc = send_apdu (slot, apdu, apdulen, result, &resultlen, NULL); if (rc || resultlen < 2) { log_error ("apdu_send_direct(%d) for get response failed: %s\n", slot, apdu_strerror (rc)); unlock_slot (slot); xfree (result_buffer); return rc ? rc : SW_HOST_INCOMPLETE_CARD_RESPONSE; } sw = (result[resultlen-2] << 8) | result[resultlen-1]; resultlen -= 2; if (DBG_CARD_IO) { log_debug (" more: sw=%04X datalen=%d\n", sw, (unsigned int)resultlen); if (!retbuf && (sw==SW_SUCCESS || (sw&0xff00)==SW_MORE_DATA)) log_printhex (" dump: ", result, resultlen); } if ((sw & 0xff00) == SW_MORE_DATA || sw == SW_SUCCESS || sw == SW_EOF_REACHED ) { if (retbuf && resultlen) { if (p - *retbuf + resultlen > bufsize) { bufsize += resultlen > 4096? resultlen: 4096; tmp = xtryrealloc (*retbuf, bufsize + 2); if (!tmp) { unlock_slot (slot); xfree (result_buffer); return SW_HOST_OUT_OF_CORE; } p = tmp + (p - *retbuf); *retbuf = tmp; } memcpy (p, result, resultlen); p += resultlen; } } else log_info ("apdu_send_direct(%d) " "got unexpected status %04X from get response\n", slot, sw); } while ((sw & 0xff00) == SW_MORE_DATA); if (retbuf) { *retbuflen = p - *retbuf; tmp = xtryrealloc (*retbuf, *retbuflen + 2); if (tmp) *retbuf = tmp; } } else { if (retbuf) { *retbuf = xtrymalloc ((resultlen? resultlen : 1)+2); if (!*retbuf) { unlock_slot (slot); xfree (result_buffer); return SW_HOST_OUT_OF_CORE; } *retbuflen = resultlen; memcpy (*retbuf, result, resultlen); } } unlock_slot (slot); xfree (result_buffer); /* Append the status word. Note that we reserved the two extra bytes while allocating the buffer. */ if (retbuf) { (*retbuf)[(*retbuflen)++] = (sw >> 8); (*retbuf)[(*retbuflen)++] = sw; } if (DBG_CARD_IO && retbuf) log_printhex (" dump: ", *retbuf, *retbuflen); return 0; } diff --git a/scd/apdu.h b/scd/apdu.h index 94d7449bb..61501c43b 100644 --- a/scd/apdu.h +++ b/scd/apdu.h @@ -1,146 +1,146 @@ /* apdu.h - ISO 7816 APDU functions and low level I/O * Copyright (C) 2003, 2008 Free Software Foundation, Inc. * * This file is part of GnuPG. * * GnuPG is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * GnuPG is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . * * $Id$ */ #ifndef APDU_H #define APDU_H /* ISO 7816 values for the statusword are defined here because they should not be visible to the users of the actual ISO command API. */ enum { SW_MORE_DATA = 0x6100, /* Note: that the low byte must be masked of.*/ SW_EOF_REACHED = 0x6282, SW_TERM_STATE = 0x6285, /* Selected file is in termination state. */ SW_EEPROM_FAILURE = 0x6581, SW_WRONG_LENGTH = 0x6700, SW_SM_NOT_SUP = 0x6882, /* Secure Messaging is not supported. */ SW_CC_NOT_SUP = 0x6884, /* Command Chaining is not supported. */ SW_CHV_WRONG = 0x6982, SW_CHV_BLOCKED = 0x6983, SW_USE_CONDITIONS = 0x6985, SW_BAD_PARAMETER = 0x6a80, /* (in the data field) */ SW_NOT_SUPPORTED = 0x6a81, SW_FILE_NOT_FOUND = 0x6a82, SW_RECORD_NOT_FOUND = 0x6a83, SW_BAD_LC = 0x6a87, /* Lc does not match command or p1/p2. */ SW_REF_NOT_FOUND = 0x6a88, SW_BAD_P0_P1 = 0x6b00, SW_EXACT_LENGTH = 0x6c00, SW_INS_NOT_SUP = 0x6d00, SW_CLA_NOT_SUP = 0x6e00, SW_SUCCESS = 0x9000, /* The follwoing statuswords are no real ones but used to map host OS errors into status words. A status word is 16 bit so that those values can't be issued by a card. */ SW_HOST_OUT_OF_CORE = 0x10001, /* No way yet to differentiate between errnos on a failed malloc. */ SW_HOST_INV_VALUE = 0x10002, SW_HOST_INCOMPLETE_CARD_RESPONSE = 0x10003, SW_HOST_NO_DRIVER = 0x10004, SW_HOST_NOT_SUPPORTED = 0x10005, SW_HOST_LOCKING_FAILED= 0x10006, SW_HOST_BUSY = 0x10007, SW_HOST_NO_CARD = 0x10008, SW_HOST_CARD_INACTIVE = 0x10009, SW_HOST_CARD_IO_ERROR = 0x1000a, SW_HOST_GENERAL_ERROR = 0x1000b, SW_HOST_NO_READER = 0x1000c, SW_HOST_ABORTED = 0x1000d, SW_HOST_NO_KEYPAD = 0x1000e, SW_HOST_ALREADY_CONNECTED = 0x1000f }; #define SW_EXACT_LENGTH_P(a) (((a)&~0xff) == SW_EXACT_LENGTH) /* Bit flags for the card status. */ #define APDU_CARD_USABLE (1) /* Card is present and ready for use. */ #define APDU_CARD_PRESENT (2) /* Card is just present. */ #define APDU_CARD_ACTIVE (4) /* Card is active. */ /* Note, that apdu_open_reader returns no status word but -1 on error. */ -int apdu_open_reader (const char *portstr, int *r_no_service); +int apdu_open_reader (const char *portstr); int apdu_open_remote_reader (const char *portstr, const unsigned char *cookie, size_t length, int (*readfnc) (void *opaque, void *buffer, size_t size), void *readfnc_value, int (*writefnc) (void *opaque, const void *buffer, size_t size), void *writefnc_value, void (*closefnc) (void *opaque), void *closefnc_value); int apdu_shutdown_reader (int slot); int apdu_close_reader (int slot); void apdu_prepare_exit (void); int apdu_enum_reader (int slot, int *used); unsigned char *apdu_get_atr (int slot, size_t *atrlen); const char *apdu_strerror (int rc); /* These APDU functions return status words. */ int apdu_connect (int slot); int apdu_disconnect (int slot); int apdu_set_progress_cb (int slot, gcry_handler_progress_t cb, void *cb_arg); int apdu_activate (int slot); int apdu_reset (int slot); int apdu_get_status (int slot, int hang, unsigned int *status, unsigned int *changed); int apdu_check_keypad (int slot, int command, int pin_mode, int pinlen_min, int pinlen_max, int pin_padlen); int apdu_keypad_verify (int slot, int class, int ins, int p0, int p1, int pin_mode, int pinlen_min, int pinlen_max, int pin_padlen); int apdu_keypad_modify (int slot, int class, int ins, int p0, int p1, int pin_mode, int pinlen_min, int pinlen_max, int pin_padlen); int apdu_send_simple (int slot, int extended_mode, int class, int ins, int p0, int p1, int lc, const char *data); int apdu_send_simple_kp (int slot, int class, int ins, int p0, int p1, int lc, const char *data, int pin_mode, int pinlen_min, int pinlen_max, int pin_padlen); int apdu_send (int slot, int extended_mode, int class, int ins, int p0, int p1, int lc, const char *data, unsigned char **retbuf, size_t *retbuflen); int apdu_send_le (int slot, int extended_mode, int class, int ins, int p0, int p1, int lc, const char *data, int le, unsigned char **retbuf, size_t *retbuflen); int apdu_send_direct (int slot, size_t extended_length, const unsigned char *apdudata, size_t apdudatalen, int handle_more, unsigned char **retbuf, size_t *retbuflen); #endif /*APDU_H*/ diff --git a/scd/command.c b/scd/command.c index da11e881f..2123b9d6d 100644 --- a/scd/command.c +++ b/scd/command.c @@ -1,2367 +1,2353 @@ /* command.c - SCdaemon command handler * Copyright (C) 2001, 2002, 2003, 2004, 2005, * 2007, 2008, 2009 Free Software Foundation, Inc. * * This file is part of GnuPG. * * GnuPG is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * GnuPG is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ #include #include #include #include #include #include #include #include #ifdef USE_GNU_PTH # include #endif #include "scdaemon.h" #include #include #include "app-common.h" #include "apdu.h" /* Required for apdu_*_reader (). */ #include "exechelp.h" #ifdef HAVE_LIBUSB #include "ccid-driver.h" #endif /* Maximum length allowed as a PIN; used for INQUIRE NEEDPIN */ #define MAXLEN_PIN 100 /* Maximum allowed size of key data as used in inquiries. */ #define MAXLEN_KEYDATA 4096 /* Maximum allowed total data size for SETDATA. */ #define MAXLEN_SETDATA 4096 /* Maximum allowed size of certificate data as used in inquiries. */ #define MAXLEN_CERTDATA 16384 #define set_error(e,t) assuan_set_error (ctx, gpg_error (e), (t)) /* Macro to flag a removed card. ENODEV is also tested to catch teh case of a removed reader. */ #define TEST_CARD_REMOVAL(c,r) \ do { \ int _r = (r); \ if (gpg_err_code (_r) == GPG_ERR_CARD_NOT_PRESENT \ || gpg_err_code (_r) == GPG_ERR_CARD_REMOVED \ || gpg_err_code (_r) == GPG_ERR_CARD_RESET \ || gpg_err_code (_r) == GPG_ERR_ENODEV ) \ update_card_removed ((c)->reader_slot, 1); \ } while (0) #define IS_LOCKED(c) \ (locked_session && locked_session != (c)->server_local \ && (c)->reader_slot != -1 && locked_session->ctrl_backlink \ && (c)->reader_slot == locked_session->ctrl_backlink->reader_slot) -/* Flag indicating that the reader has been disabled. */ -static int reader_disabled; - - /* This structure is used to keep track of open readers (slots). */ struct slot_status_s { int valid; /* True if the other objects are valid. */ int slot; /* Slot number of the reader or -1 if not open. */ int reset_failed; /* A reset failed. */ int any; /* Flag indicating whether any status check has been done. This is set once to indicate that the status tracking for the slot has been initialized. */ unsigned int status; /* Last status of the slot. */ unsigned int changed; /* Last change counter of the slot. */ }; /* Data used to associate an Assuan context with local server data. This object describes the local properties of one session. */ struct server_local_s { /* We keep a list of all active sessions with the anchor at SESSION_LIST (see below). This field is used for linking. */ struct server_local_s *next_session; /* This object is usually assigned to a CTRL object (which is globally visible). While enumerating all sessions we sometimes need to access data of the CTRL object; thus we keep a backpointer here. */ ctrl_t ctrl_backlink; /* The Assuan context used by this session/server. */ assuan_context_t assuan_ctx; #ifdef HAVE_W32_SYSTEM unsigned long event_signal; /* Or 0 if not used. */ #else int event_signal; /* Or 0 if not used. */ #endif /* True if the card has been removed and a reset is required to continue operation. */ int card_removed; /* Flag indicating that the application context needs to be released at the next opportunity. */ int app_ctx_marked_for_release; /* A disconnect command has been sent. */ int disconnect_allowed; /* If set to true we will be terminate ourself at the end of the this session. */ int stopme; }; /* The table with information on all used slots. FIXME: This is a different slot number than the one used by the APDU layer, and should be renamed. */ static struct slot_status_s slot_table[10]; /* To keep track of all running sessions, we link all active server contexts and the anchor in this variable. */ static struct server_local_s *session_list; /* If a session has been locked we store a link to its server object in this variable. */ static struct server_local_s *locked_session; /* While doing a reset we need to make sure that the ticker does not call scd_update_reader_status_file while we are using it. */ static pth_mutex_t status_file_update_lock; /*-- Local prototypes --*/ static void update_reader_status_file (int set_card_removed_flag); /* This function must be called once to initialize this module. This has to be done before a second thread is spawned. We can't do the static initialization because Pth emulation code might not be able to do a static init; in particular, it is not possible for W32. */ void initialize_module_command (void) { static int initialized; if (!initialized) { if (pth_mutex_init (&status_file_update_lock)) initialized = 1; } } /* Update the CARD_REMOVED element of all sessions using the reader given by SLOT to VALUE. */ static void update_card_removed (int slot, int value) { struct server_local_s *sl; if (slot == -1) return; for (sl=session_list; sl; sl = sl->next_session) if (sl->ctrl_backlink && sl->ctrl_backlink->reader_slot == slot) { sl->card_removed = value; } /* Let the card application layer know about the removal. */ if (value) application_notify_card_reset (slot); } /* Check whether the option NAME appears in LINE. Returns 1 or 0. */ static int has_option (const char *line, const char *name) { const char *s; int n = strlen (name); s = strstr (line, name); return (s && (s == line || spacep (s-1)) && (!s[n] || spacep (s+n))); } /* Same as has_option but does only test for the name of the option and ignores an argument, i.e. with NAME being "--hash" it would return a pointer for "--hash" as well as for "--hash=foo". If there is no such option NULL is returned. The pointer returned points right behind the option name, this may be an equal sign, Nul or a space. */ static const char * has_option_name (const char *line, const char *name) { const char *s; int n = strlen (name); s = strstr (line, name); return (s && (s == line || spacep (s-1)) && (!s[n] || spacep (s+n) || s[n] == '=')) ? (s+n) : NULL; } /* Skip over options. It is assumed that leading spaces have been removed (this is the case for lines passed to a handler from assuan). Blanks after the options are also removed. */ static char * skip_options (char *line) { while ( *line == '-' && line[1] == '-' ) { while (*line && !spacep (line)) line++; while (spacep (line)) line++; } return line; } /* Convert the STRING into a newly allocated buffer while translating the hex numbers. Stops at the first invalid character. Blanks and colons are allowed to separate the hex digits. Returns NULL on error or a newly malloced buffer and its length in LENGTH. */ static unsigned char * hex_to_buffer (const char *string, size_t *r_length) { unsigned char *buffer; const char *s; size_t n; buffer = xtrymalloc (strlen (string)+1); if (!buffer) return NULL; for (s=string, n=0; *s; s++) { if (spacep (s) || *s == ':') continue; if (hexdigitp (s) && hexdigitp (s+1)) { buffer[n++] = xtoi_2 (s); s++; } else break; } *r_length = n; return buffer; } /* Reset the card and free the application context. With SEND_RESET set to true actually send a RESET to the reader; this is the normal way of calling the function. */ static void do_reset (ctrl_t ctrl, int send_reset) { int slot = ctrl->reader_slot; if (!(slot == -1 || (slot >= 0 && slot < DIM(slot_table)))) BUG (); /* If there is an active application, release it. Tell all other sessions using the same application to release the application. */ if (ctrl->app_ctx) { release_application (ctrl->app_ctx); ctrl->app_ctx = NULL; if (send_reset) { struct server_local_s *sl; for (sl=session_list; sl; sl = sl->next_session) if (sl->ctrl_backlink && sl->ctrl_backlink->reader_slot == slot) { sl->app_ctx_marked_for_release = 1; } } } /* If we want a real reset for the card, send the reset APDU and tell the application layer about it. */ if (slot != -1 && send_reset && !IS_LOCKED (ctrl) ) { application_notify_card_reset (slot); switch (apdu_reset (slot)) { case 0: break; case SW_HOST_NO_CARD: case SW_HOST_CARD_INACTIVE: break; default: apdu_close_reader (slot); slot_table[slot].slot = -1; break; } } /* If we hold a lock, unlock now. */ if (locked_session && ctrl->server_local == locked_session) { locked_session = NULL; log_info ("implicitly unlocking due to RESET\n"); } /* Reset the card removed flag for the current reader. We need to take the lock here so that the ticker thread won't concurrently try to update the file. Calling update_reader_status_file is required to get hold of the new status of the card in the slot table. */ if (!pth_mutex_acquire (&status_file_update_lock, 0, NULL)) { log_error ("failed to acquire status_fle_update lock\n"); ctrl->reader_slot = -1; return; } update_reader_status_file (0); /* Update slot status table. */ update_card_removed (slot, 0); /* Clear card_removed flag. */ if (!pth_mutex_release (&status_file_update_lock)) log_error ("failed to release status_file_update lock\n"); /* Do this last, so that the update_card_removed above does its job. */ ctrl->reader_slot = -1; } static gpg_error_t reset_notify (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); (void) line; do_reset (ctrl, 1); return 0; } static gpg_error_t option_handler (assuan_context_t ctx, const char *key, const char *value) { ctrl_t ctrl = assuan_get_pointer (ctx); if (!strcmp (key, "event-signal")) { /* A value of 0 is allowed to reset the event signal. */ #ifdef HAVE_W32_SYSTEM if (!*value) return gpg_error (GPG_ERR_ASS_PARAMETER); ctrl->server_local->event_signal = strtoul (value, NULL, 16); #else int i = *value? atoi (value) : -1; if (i < 0) return gpg_error (GPG_ERR_ASS_PARAMETER); ctrl->server_local->event_signal = i; #endif } return 0; } /* Return the slot of the current reader or open the reader if no other sessions are using a reader. Note, that we currently support only one reader but most of the code (except for this function) should be able to cope with several readers. */ static int get_reader_slot (void) { struct slot_status_s *ss; ss = &slot_table[0]; /* One reader for now. */ /* Initialize the item if needed. */ if (!ss->valid) { ss->slot = -1; ss->valid = 1; } /* Try to open the reader. */ if (ss->slot == -1) { - int no_service_flag; - ss->slot = apdu_open_reader (opt.reader_port, &no_service_flag); - - if (no_service_flag) - { - log_info ("no card services - disabling scdaemon\n"); - reader_disabled = 1; - } + ss->slot = apdu_open_reader (opt.reader_port); /* If we still don't have a slot, we have no readers. Invalidate for now until a reader is attached. */ if(ss->slot == -1) { ss->valid = 0; return -1; } } /* Return the slot_table index. */ return 0; } /* If the card has not yet been opened, do it. */ static gpg_error_t open_card (ctrl_t ctrl, const char *apptype) { gpg_error_t err; int slot; - if (reader_disabled) - return gpg_error (GPG_ERR_NOT_OPERATIONAL); - /* If we ever got a card not present error code, return that. Only the SERIALNO command and a reset are able to clear from that state. */ if (ctrl->server_local->card_removed) return gpg_error (GPG_ERR_CARD_REMOVED); if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); /* If the application has been marked for release do it now. We can't do it immediately in do_reset because the application may still be in use. */ if (ctrl->server_local->app_ctx_marked_for_release) { ctrl->server_local->app_ctx_marked_for_release = 0; release_application (ctrl->app_ctx); ctrl->app_ctx = NULL; } /* If we are already initialized for one specific application we need to check that the client didn't requested a specific application different from the one in use before we continue. */ if (ctrl->app_ctx) return check_application_conflict (ctrl, apptype); /* Setup the slot and select the application. */ if (ctrl->reader_slot != -1) slot = ctrl->reader_slot; else slot = get_reader_slot (); ctrl->reader_slot = slot; if (slot == -1) - err = gpg_error (reader_disabled? GPG_ERR_NOT_OPERATIONAL: GPG_ERR_CARD); + err = gpg_error (GPG_ERR_CARD); else { /* Fixme: We should move the apdu_connect call to select_application. */ int sw; ctrl->server_local->disconnect_allowed = 0; sw = apdu_connect (slot); if (sw && sw != SW_HOST_ALREADY_CONNECTED) { if (sw == SW_HOST_NO_CARD) err = gpg_error (GPG_ERR_CARD_NOT_PRESENT); else if (sw == SW_HOST_CARD_INACTIVE) err = gpg_error (GPG_ERR_CARD_RESET); else err = gpg_error (GPG_ERR_CARD); } else err = select_application (ctrl, slot, apptype, &ctrl->app_ctx); } TEST_CARD_REMOVAL (ctrl, err); return err; } static const char hlp_serialno[] = "SERIALNO []\n" "\n" "Return the serial number of the card using a status reponse. This\n" "function should be used to check for the presence of a card.\n" "\n" "If APPTYPE is given, an application of that type is selected and an\n" "error is returned if the application is not supported or available.\n" "The default is to auto-select the application using a hardwired\n" "preference system. Note, that a future extension to this function\n" "may allow to specify a list and order of applications to try.\n" "\n" "This function is special in that it can be used to reset the card.\n" "Most other functions will return an error when a card change has\n" "been detected and the use of this function is therefore required.\n" "\n" "Background: We want to keep the client clear of handling card\n" "changes between operations; i.e. the client can assume that all\n" "operations are done on the same card unless he calls this function."; static gpg_error_t cmd_serialno (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc = 0; char *serial_and_stamp; char *serial; time_t stamp; int retries = 0; /* Clear the remove flag so that the open_card is able to reread it. */ retry: - if (!reader_disabled && ctrl->server_local->card_removed) + if (ctrl->server_local->card_removed) { if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); do_reset (ctrl, 1); } if ((rc = open_card (ctrl, *line? line:NULL))) { /* In case of an inactive card, retry once. */ if (gpg_err_code (rc) == GPG_ERR_CARD_RESET && retries++ < 1) goto retry; return rc; } rc = app_get_serial_and_stamp (ctrl->app_ctx, &serial, &stamp); if (rc) return rc; rc = estream_asprintf (&serial_and_stamp, "%s %lu", serial, (unsigned long)stamp); xfree (serial); if (rc < 0) return out_of_core (); rc = 0; assuan_write_status (ctx, "SERIALNO", serial_and_stamp); xfree (serial_and_stamp); return 0; } static const char hlp_learn[] = "LEARN [--force] [--keypairinfo]\n" "\n" "Learn all useful information of the currently inserted card. When\n" "used without the force options, the command might do an INQUIRE\n" "like this:\n" "\n" " INQUIRE KNOWNCARDP \n" "\n" "The client should just send an \"END\" if the processing should go on\n" "or a \"CANCEL\" to force the function to terminate with a Cancel\n" "error message.\n" "\n" "With the option --keypairinfo only KEYPARIINFO lstatus lines are\n" "returned.\n" "\n" "The response of this command is a list of status lines formatted as\n" "this:\n" "\n" " S APPTYPE \n" "\n" "This returns the type of the application, currently the strings:\n" "\n" " P15 = PKCS-15 structure used\n" " DINSIG = DIN SIG\n" " OPENPGP = OpenPGP card\n" " NKS = NetKey card\n" "\n" "are implemented. These strings are aliases for the AID\n" "\n" " S KEYPAIRINFO \n" "\n" "If there is no certificate yet stored on the card a single 'X' is\n" "returned as the keygrip. In addition to the keypair info, information\n" "about all certificates stored on the card is also returned:\n" "\n" " S CERTINFO \n" "\n" "Where CERTTYPE is a number indicating the type of certificate:\n" " 0 := Unknown\n" " 100 := Regular X.509 cert\n" " 101 := Trusted X.509 cert\n" " 102 := Useful X.509 cert\n" " 110 := Root CA cert in a special format (e.g. DINSIG)\n" " 111 := Root CA cert as standard X509 cert.\n" "\n" "For certain cards, more information will be returned:\n" "\n" " S KEY-FPR \n" "\n" "For OpenPGP cards this returns the stored fingerprints of the\n" "keys. This can be used check whether a key is available on the\n" "card. NO may be 1, 2 or 3.\n" "\n" " S CA-FPR \n" "\n" "Similar to above, these are the fingerprints of keys assumed to be\n" "ultimately trusted.\n" "\n" " S DISP-NAME \n" "\n" "The name of the card holder as stored on the card; percent\n" "escaping takes place, spaces are encoded as '+'\n" "\n" " S PUBKEY-URL \n" "\n" "The URL to be used for locating the entire public key.\n" " \n" "Note, that this function may even be used on a locked card."; static gpg_error_t cmd_learn (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc = 0; int only_keypairinfo = has_option (line, "--keypairinfo"); if ((rc = open_card (ctrl, NULL))) return rc; /* Unless the force option is used we try a shortcut by identifying the card using a serial number and inquiring the client with that. The client may choose to cancel the operation if he already knows about this card */ if (!only_keypairinfo) { char *serial_and_stamp; char *serial; time_t stamp; rc = app_get_serial_and_stamp (ctrl->app_ctx, &serial, &stamp); if (rc) return rc; rc = estream_asprintf (&serial_and_stamp, "%s %lu", serial, (unsigned long)stamp); xfree (serial); if (rc < 0) return out_of_core (); rc = 0; assuan_write_status (ctx, "SERIALNO", serial_and_stamp); if (!has_option (line, "--force")) { char *command; rc = estream_asprintf (&command, "KNOWNCARDP %s", serial_and_stamp); if (rc < 0) { xfree (serial_and_stamp); return out_of_core (); } rc = 0; rc = assuan_inquire (ctx, command, NULL, NULL, 0); xfree (command); if (rc) { if (gpg_err_code (rc) != GPG_ERR_ASS_CANCELED) log_error ("inquire KNOWNCARDP failed: %s\n", gpg_strerror (rc)); xfree (serial_and_stamp); return rc; } /* Not canceled, so we have to proceeed. */ } xfree (serial_and_stamp); } /* Let the application print out its collection of useful status information. */ if (!rc) rc = app_write_learn_status (ctrl->app_ctx, ctrl, only_keypairinfo); TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_readcert[] = "READCERT |\n" "\n" "Note, that this function may even be used on a locked card."; static gpg_error_t cmd_readcert (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; unsigned char *cert; size_t ncert; if ((rc = open_card (ctrl, NULL))) return rc; line = xstrdup (line); /* Need a copy of the line. */ rc = app_readcert (ctrl->app_ctx, line, &cert, &ncert); if (rc) log_error ("app_readcert failed: %s\n", gpg_strerror (rc)); xfree (line); line = NULL; if (!rc) { rc = assuan_send_data (ctx, cert, ncert); xfree (cert); if (rc) return rc; } TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_readkey[] = "READKEY \n" "\n" "Return the public key for the given cert or key ID as a standard\n" "S-expression.\n" "\n" "Note, that this function may even be used on a locked card."; static gpg_error_t cmd_readkey (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; unsigned char *cert = NULL; size_t ncert, n; ksba_cert_t kc = NULL; ksba_sexp_t p; unsigned char *pk; size_t pklen; if ((rc = open_card (ctrl, NULL))) return rc; line = xstrdup (line); /* Need a copy of the line. */ /* If the application supports the READKEY function we use that. Otherwise we use the old way by extracting it from the certificate. */ rc = app_readkey (ctrl->app_ctx, line, &pk, &pklen); if (!rc) { /* Yeah, got that key - send it back. */ rc = assuan_send_data (ctx, pk, pklen); xfree (pk); xfree (line); line = NULL; goto leave; } if (gpg_err_code (rc) != GPG_ERR_UNSUPPORTED_OPERATION) log_error ("app_readkey failed: %s\n", gpg_strerror (rc)); else { rc = app_readcert (ctrl->app_ctx, line, &cert, &ncert); if (rc) log_error ("app_readcert failed: %s\n", gpg_strerror (rc)); } xfree (line); line = NULL; if (rc) goto leave; rc = ksba_cert_new (&kc); if (rc) { xfree (cert); goto leave; } rc = ksba_cert_init_from_mem (kc, cert, ncert); if (rc) { log_error ("failed to parse the certificate: %s\n", gpg_strerror (rc)); goto leave; } p = ksba_cert_get_public_key (kc); if (!p) { rc = gpg_error (GPG_ERR_NO_PUBKEY); goto leave; } n = gcry_sexp_canon_len (p, 0, NULL, NULL); rc = assuan_send_data (ctx, p, n); xfree (p); leave: ksba_cert_release (kc); xfree (cert); TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_setdata[] = "SETDATA [--append] \n" "\n" "The client should use this command to tell us the data he want to sign.\n" "With the option --append, the data is appended to the data set by a\n" "previous SETDATA command."; static gpg_error_t cmd_setdata (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int append; int n, i, off; char *p; unsigned char *buf; append = (ctrl->in_data.value && has_option (line, "--append")); line = skip_options (line); if (locked_session && locked_session != ctrl->server_local) return gpg_error (GPG_ERR_LOCKED); /* Parse the hexstring. */ for (p=line,n=0; hexdigitp (p); p++, n++) ; if (*p) return set_error (GPG_ERR_ASS_PARAMETER, "invalid hexstring"); if (!n) return set_error (GPG_ERR_ASS_PARAMETER, "no data given"); if ((n&1)) return set_error (GPG_ERR_ASS_PARAMETER, "odd number of digits"); n /= 2; if (append) { if (ctrl->in_data.valuelen + n > MAXLEN_SETDATA) return set_error (GPG_ERR_TOO_LARGE, "limit on total size of data reached"); buf = xtrymalloc (ctrl->in_data.valuelen + n); } else buf = xtrymalloc (n); if (!buf) return out_of_core (); if (append) { memcpy (buf, ctrl->in_data.value, ctrl->in_data.valuelen); off = ctrl->in_data.valuelen; } else off = 0; for (p=line, i=0; i < n; p += 2, i++) buf[off+i] = xtoi_2 (p); ctrl->in_data.value = buf; ctrl->in_data.valuelen = off + n; return 0; } static gpg_error_t pin_cb (void *opaque, const char *info, char **retstr) { assuan_context_t ctx = opaque; char *command; int rc; unsigned char *value; size_t valuelen; if (!retstr) { /* We prompt for keypad entry. To make sure that the popup has been show we use an inquire and not just a status message. We ignore any value returned. */ if (info) { log_debug ("prompting for keypad entry '%s'\n", info); rc = estream_asprintf (&command, "POPUPKEYPADPROMPT %s", info); if (rc < 0) return gpg_error (gpg_err_code_from_errno (errno)); rc = assuan_inquire (ctx, command, &value, &valuelen, MAXLEN_PIN); xfree (command); } else { log_debug ("dismiss keypad entry prompt\n"); rc = assuan_inquire (ctx, "DISMISSKEYPADPROMPT", &value, &valuelen, MAXLEN_PIN); } if (!rc) xfree (value); return rc; } *retstr = NULL; log_debug ("asking for PIN '%s'\n", info); rc = estream_asprintf (&command, "NEEDPIN %s", info); if (rc < 0) return gpg_error (gpg_err_code_from_errno (errno)); /* Fixme: Write an inquire function which returns the result in secure memory and check all further handling of the PIN. */ rc = assuan_inquire (ctx, command, &value, &valuelen, MAXLEN_PIN); xfree (command); if (rc) return rc; if (!valuelen || value[valuelen-1]) { /* We require that the returned value is an UTF-8 string */ xfree (value); return gpg_error (GPG_ERR_INV_RESPONSE); } *retstr = (char*)value; return 0; } static const char hlp_pksign[] = "PKSIGN [--hash=[rmd160|sha{1,224,256,384,512}|md5]] \n" "\n" "The --hash option is optional; the default is SHA1."; static gpg_error_t cmd_pksign (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; unsigned char *outdata; size_t outdatalen; char *keyidstr; int hash_algo; if (has_option (line, "--hash=rmd160")) hash_algo = GCRY_MD_RMD160; else if (has_option (line, "--hash=sha1")) hash_algo = GCRY_MD_SHA1; else if (has_option (line, "--hash=sha224")) hash_algo = GCRY_MD_SHA224; else if (has_option (line, "--hash=sha256")) hash_algo = GCRY_MD_SHA256; else if (has_option (line, "--hash=sha384")) hash_algo = GCRY_MD_SHA384; else if (has_option (line, "--hash=sha512")) hash_algo = GCRY_MD_SHA512; else if (has_option (line, "--hash=md5")) hash_algo = GCRY_MD_MD5; else if (!strstr (line, "--")) hash_algo = GCRY_MD_SHA1; else return set_error (GPG_ERR_ASS_PARAMETER, "invalid hash algorithm"); line = skip_options (line); if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); if ((rc = open_card (ctrl, NULL))) return rc; /* We have to use a copy of the key ID because the function may use the pin_cb which in turn uses the assuan line buffer and thus overwriting the original line with the keyid */ keyidstr = xtrystrdup (line); if (!keyidstr) return out_of_core (); rc = app_sign (ctrl->app_ctx, keyidstr, hash_algo, pin_cb, ctx, ctrl->in_data.value, ctrl->in_data.valuelen, &outdata, &outdatalen); xfree (keyidstr); if (rc) { log_error ("app_sign failed: %s\n", gpg_strerror (rc)); } else { rc = assuan_send_data (ctx, outdata, outdatalen); xfree (outdata); if (rc) return rc; /* that is already an assuan error code */ } TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_pkauth[] = "PKAUTH "; static gpg_error_t cmd_pkauth (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; unsigned char *outdata; size_t outdatalen; char *keyidstr; if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); if ((rc = open_card (ctrl, NULL))) return rc; if (!ctrl->app_ctx) return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION); /* We have to use a copy of the key ID because the function may use the pin_cb which in turn uses the assuan line buffer and thus overwriting the original line with the keyid */ keyidstr = xtrystrdup (line); if (!keyidstr) return out_of_core (); rc = app_auth (ctrl->app_ctx, keyidstr, pin_cb, ctx, ctrl->in_data.value, ctrl->in_data.valuelen, &outdata, &outdatalen); xfree (keyidstr); if (rc) { log_error ("app_auth failed: %s\n", gpg_strerror (rc)); } else { rc = assuan_send_data (ctx, outdata, outdatalen); xfree (outdata); if (rc) return rc; /* that is already an assuan error code */ } TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_pkdecrypt[] = "PKDECRYPT "; static gpg_error_t cmd_pkdecrypt (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; unsigned char *outdata; size_t outdatalen; char *keyidstr; if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); if ((rc = open_card (ctrl, NULL))) return rc; keyidstr = xtrystrdup (line); if (!keyidstr) return out_of_core (); rc = app_decipher (ctrl->app_ctx, keyidstr, pin_cb, ctx, ctrl->in_data.value, ctrl->in_data.valuelen, &outdata, &outdatalen); xfree (keyidstr); if (rc) { log_error ("app_decipher failed: %s\n", gpg_strerror (rc)); } else { rc = assuan_send_data (ctx, outdata, outdatalen); xfree (outdata); if (rc) return rc; /* that is already an assuan error code */ } TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_getattr[] = "GETATTR \n" "\n" "This command is used to retrieve data from a smartcard. The\n" "allowed names depend on the currently selected smartcard\n" "application. NAME must be percent and '+' escaped. The value is\n" "returned through status message, see the LEARN command for details.\n" "\n" "However, the current implementation assumes that Name is not escaped;\n" "this works as long as noone uses arbitrary escaping. \n" "\n" "Note, that this function may even be used on a locked card."; static gpg_error_t cmd_getattr (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; const char *keyword; if ((rc = open_card (ctrl, NULL))) return rc; keyword = line; for (; *line && !spacep (line); line++) ; if (*line) *line++ = 0; /* (We ignore any garbage for now.) */ /* FIXME: Applications should not return sensitive data if the card is locked. */ rc = app_getattr (ctrl->app_ctx, ctrl, keyword); TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_setattr[] = "SETATTR \n" "\n" "This command is used to store data on a a smartcard. The allowed\n" "names and values are depend on the currently selected smartcard\n" "application. NAME and VALUE must be percent and '+' escaped.\n" "\n" "However, the current implementation assumes that NAME is not\n" "escaped; this works as long as noone uses arbitrary escaping.\n" "\n" "A PIN will be requested for most NAMEs. See the corresponding\n" "setattr function of the actually used application (app-*.c) for\n" "details."; static gpg_error_t cmd_setattr (assuan_context_t ctx, char *orig_line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; char *keyword; int keywordlen; size_t nbytes; char *line, *linebuf; if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); if ((rc = open_card (ctrl, NULL))) return rc; /* We need to use a copy of LINE, because PIN_CB uses the same context and thus reuses the Assuan provided LINE. */ line = linebuf = xtrystrdup (orig_line); if (!line) return out_of_core (); keyword = line; for (keywordlen=0; *line && !spacep (line); line++, keywordlen++) ; if (*line) *line++ = 0; while (spacep (line)) line++; nbytes = percent_plus_unescape_inplace (line, 0); rc = app_setattr (ctrl->app_ctx, keyword, pin_cb, ctx, (const unsigned char*)line, nbytes); xfree (linebuf); TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_writecert[] = "WRITECERT \n" "\n" "This command is used to store a certifciate on a smartcard. The\n" "allowed certids depend on the currently selected smartcard\n" "application. The actual certifciate is requested using the inquiry\n" "\"CERTDATA\" and needs to be provided in its raw (e.g. DER) form.\n" "\n" "In almost all cases a a PIN will be requested. See the related\n" "writecert function of the actually used application (app-*.c) for\n" "details."; static gpg_error_t cmd_writecert (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; char *certid; unsigned char *certdata; size_t certdatalen; if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); line = skip_options (line); if (!*line) return set_error (GPG_ERR_ASS_PARAMETER, "no certid given"); certid = line; while (*line && !spacep (line)) line++; *line = 0; if ((rc = open_card (ctrl, NULL))) return rc; if (!ctrl->app_ctx) return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION); certid = xtrystrdup (certid); if (!certid) return out_of_core (); /* Now get the actual keydata. */ rc = assuan_inquire (ctx, "CERTDATA", &certdata, &certdatalen, MAXLEN_CERTDATA); if (rc) { xfree (certid); return rc; } /* Write the certificate to the card. */ rc = app_writecert (ctrl->app_ctx, ctrl, certid, pin_cb, ctx, certdata, certdatalen); xfree (certid); xfree (certdata); TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_writekey[] = "WRITEKEY [--force] \n" "\n" "This command is used to store a secret key on a a smartcard. The\n" "allowed keyids depend on the currently selected smartcard\n" "application. The actual keydata is requested using the inquiry\n" "\"KEYDATA\" and need to be provided without any protection. With\n" "--force set an existing key under this KEYID will get overwritten.\n" "The keydata is expected to be the usual canonical encoded\n" "S-expression.\n" "\n" "A PIN will be requested for most NAMEs. See the corresponding\n" "writekey function of the actually used application (app-*.c) for\n" "details."; static gpg_error_t cmd_writekey (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; char *keyid; int force = has_option (line, "--force"); unsigned char *keydata; size_t keydatalen; if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); line = skip_options (line); if (!*line) return set_error (GPG_ERR_ASS_PARAMETER, "no keyid given"); keyid = line; while (*line && !spacep (line)) line++; *line = 0; if ((rc = open_card (ctrl, NULL))) return rc; if (!ctrl->app_ctx) return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION); keyid = xtrystrdup (keyid); if (!keyid) return out_of_core (); /* Now get the actual keydata. */ assuan_begin_confidential (ctx); rc = assuan_inquire (ctx, "KEYDATA", &keydata, &keydatalen, MAXLEN_KEYDATA); assuan_end_confidential (ctx); if (rc) { xfree (keyid); return rc; } /* Write the key to the card. */ rc = app_writekey (ctrl->app_ctx, ctrl, keyid, force? 1:0, pin_cb, ctx, keydata, keydatalen); xfree (keyid); xfree (keydata); TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_genkey[] = "GENKEY [--force] [--timestamp=] \n" "\n" "Generate a key on-card identified by NO, which is application\n" "specific. Return values are application specific. For OpenPGP\n" "cards 3 status lines are returned:\n" "\n" " S KEY-FPR \n" " S KEY-CREATED-AT \n" " S KEY-DATA [-|p|n] \n" "\n" " 'p' and 'n' are the names of the RSA parameters; '-' is used to\n" " indicate that HEXDATA is the first chunk of a parameter given\n" " by the next KEY-DATA.\n" "\n" "--force is required to overwrite an already existing key. The\n" "KEY-CREATED-AT is required for further processing because it is\n" "part of the hashed key material for the fingerprint.\n" "\n" "If --timestamp is given an OpenPGP key will be created using this\n" "value. The value needs to be in ISO Format; e.g.\n" "\"--timestamp=20030316T120000\" and after 1970-01-01 00:00:00.\n" "\n" "The public part of the key can also later be retrieved using the\n" "READKEY command."; static gpg_error_t cmd_genkey (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; char *keyno; int force; const char *s; time_t timestamp; if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); force = has_option (line, "--force"); if ((s=has_option_name (line, "--timestamp"))) { if (*s != '=') return set_error (GPG_ERR_ASS_PARAMETER, "missing value for option"); timestamp = isotime2epoch (s+1); if (timestamp < 1) return set_error (GPG_ERR_ASS_PARAMETER, "invalid time value"); } else timestamp = 0; line = skip_options (line); if (!*line) return set_error (GPG_ERR_ASS_PARAMETER, "no key number given"); keyno = line; while (*line && !spacep (line)) line++; *line = 0; if ((rc = open_card (ctrl, NULL))) return rc; if (!ctrl->app_ctx) return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION); keyno = xtrystrdup (keyno); if (!keyno) return out_of_core (); rc = app_genkey (ctrl->app_ctx, ctrl, keyno, force? 1:0, timestamp, pin_cb, ctx); xfree (keyno); TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_random[] = "RANDOM \n" "\n" "Get NBYTES of random from the card and send them back as data.\n" "This usually involves EEPROM write on the card and thus excessive\n" "use of this command may destroy the card.\n" "\n" "Note, that this function may be even be used on a locked card."; static gpg_error_t cmd_random (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; size_t nbytes; unsigned char *buffer; if (!*line) return set_error (GPG_ERR_ASS_PARAMETER, "number of requested bytes missing"); nbytes = strtoul (line, NULL, 0); if ((rc = open_card (ctrl, NULL))) return rc; if (!ctrl->app_ctx) return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION); buffer = xtrymalloc (nbytes); if (!buffer) return out_of_core (); rc = app_get_challenge (ctrl->app_ctx, nbytes, buffer); if (!rc) { rc = assuan_send_data (ctx, buffer, nbytes); xfree (buffer); return rc; /* that is already an assuan error code */ } xfree (buffer); TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_passwd[] = "PASSWD [--reset] [--nullpin] \n" "\n" "Change the PIN or, if --reset is given, reset the retry counter of\n" "the card holder verfication vector CHVNO. The option --nullpin is\n" "used for TCOS cards to set the initial PIN. The format of CHVNO\n" "depends on the card application."; static gpg_error_t cmd_passwd (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; char *chvnostr; unsigned int flags = 0; if (has_option (line, "--reset")) flags |= APP_CHANGE_FLAG_RESET; if (has_option (line, "--nullpin")) flags |= APP_CHANGE_FLAG_NULLPIN; if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); line = skip_options (line); if (!*line) return set_error (GPG_ERR_ASS_PARAMETER, "no CHV number given"); chvnostr = line; while (*line && !spacep (line)) line++; *line = 0; if ((rc = open_card (ctrl, NULL))) return rc; if (!ctrl->app_ctx) return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION); chvnostr = xtrystrdup (chvnostr); if (!chvnostr) return out_of_core (); rc = app_change_pin (ctrl->app_ctx, ctrl, chvnostr, flags, pin_cb, ctx); if (rc) log_error ("command passwd failed: %s\n", gpg_strerror (rc)); xfree (chvnostr); TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_checkpin[] = "CHECKPIN \n" "\n" "Perform a VERIFY operation without doing anything else. This may\n" "be used to initialize a the PIN cache earlier to long lasting\n" "operations. Its use is highly application dependent.\n" "\n" "For OpenPGP:\n" "\n" " Perform a simple verify operation for CHV1 and CHV2, so that\n" " further operations won't ask for CHV2 and it is possible to do a\n" " cheap check on the PIN: If there is something wrong with the PIN\n" " entry system, only the regular CHV will get blocked and not the\n" " dangerous CHV3. IDSTR is the usual card's serial number in hex\n" " notation; an optional fingerprint part will get ignored. There\n" " is however a special mode if the IDSTR is sffixed with the\n" " literal string \"[CHV3]\": In this case the Admin PIN is checked\n" " if and only if the retry counter is still at 3.\n" "\n" "For Netkey:\n" "\n" " Any of the valid PIN Ids may be used. These are the strings:\n" "\n" " PW1.CH - Global password 1\n" " PW2.CH - Global password 2\n" " PW1.CH.SIG - SigG password 1\n" " PW2.CH.SIG - SigG password 2\n" "\n" " For a definitive list, see the implementation in app-nks.c.\n" " Note that we call a PW2.* PIN a \"PUK\" despite that since TCOS\n" " 3.0 they are technically alternative PINs used to mutally\n" " unblock each other."; static gpg_error_t cmd_checkpin (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; char *idstr; if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); if ((rc = open_card (ctrl, NULL))) return rc; if (!ctrl->app_ctx) return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION); /* We have to use a copy of the key ID because the function may use the pin_cb which in turn uses the assuan line buffer and thus overwriting the original line with the keyid. */ idstr = xtrystrdup (line); if (!idstr) return out_of_core (); rc = app_check_pin (ctrl->app_ctx, idstr, pin_cb, ctx); xfree (idstr); if (rc) log_error ("app_check_pin failed: %s\n", gpg_strerror (rc)); TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_lock[] = "LOCK [--wait]\n" "\n" "Grant exclusive card access to this session. Note that there is\n" "no lock counter used and a second lock from the same session will\n" "be ignored. A single unlock (or RESET) unlocks the session.\n" "Return GPG_ERR_LOCKED if another session has locked the reader.\n" "\n" "If the option --wait is given the command will wait until a\n" "lock has been released."; static gpg_error_t cmd_lock (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc = 0; retry: if (locked_session) { if (locked_session != ctrl->server_local) rc = gpg_error (GPG_ERR_LOCKED); } else locked_session = ctrl->server_local; #ifdef USE_GNU_PTH if (rc && has_option (line, "--wait")) { rc = 0; pth_sleep (1); /* Better implement an event mechanism. However, for card operations this should be sufficient. */ /* FIXME: Need to check that the connection is still alive. This can be done by issuing status messages. */ goto retry; } #endif /*USE_GNU_PTH*/ if (rc) log_error ("cmd_lock failed: %s\n", gpg_strerror (rc)); return rc; } static const char hlp_unlock[] = "UNLOCK\n" "\n" "Release exclusive card access."; static gpg_error_t cmd_unlock (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc = 0; (void)line; if (locked_session) { if (locked_session != ctrl->server_local) rc = gpg_error (GPG_ERR_LOCKED); else locked_session = NULL; } else rc = gpg_error (GPG_ERR_NOT_LOCKED); if (rc) log_error ("cmd_unlock failed: %s\n", gpg_strerror (rc)); return rc; } static const char hlp_getinfo[] = "GETINFO \n" "\n" "Multi purpose command to return certain information. \n" "Supported values of WHAT are:\n" "\n" "version - Return the version of the program.\n" "pid - Return the process id of the server.\n" "\n" "socket_name - Return the name of the socket.\n" "\n" "status - Return the status of the current slot (in the future, may\n" "also return the status of all slots). The status is a list of\n" "one-character flags. The following flags are currently defined:\n" " 'u' Usable card present. This is the normal state during operation.\n" " 'r' Card removed. A reset is necessary.\n" "These flags are exclusive.\n" "\n" "reader_list - Return a list of detected card readers. Does\n" " currently only work with the internal CCID driver.\n" "\n" "deny_admin - Returns OK if admin commands are not allowed or\n" " GPG_ERR_GENERAL if admin commands are allowed.\n" "\n" "app_list - Return a list of supported applications. One\n" " application per line, fields delimited by colons,\n" " first field is the name."; static gpg_error_t cmd_getinfo (assuan_context_t ctx, char *line) { int rc = 0; if (!strcmp (line, "version")) { const char *s = VERSION; rc = assuan_send_data (ctx, s, strlen (s)); } else if (!strcmp (line, "pid")) { char numbuf[50]; snprintf (numbuf, sizeof numbuf, "%lu", (unsigned long)getpid ()); rc = assuan_send_data (ctx, numbuf, strlen (numbuf)); } else if (!strcmp (line, "socket_name")) { const char *s = scd_get_socket_name (); if (s) rc = assuan_send_data (ctx, s, strlen (s)); else rc = gpg_error (GPG_ERR_NO_DATA); } else if (!strcmp (line, "status")) { ctrl_t ctrl = assuan_get_pointer (ctx); int slot = ctrl->reader_slot; char flag = 'r'; if (!ctrl->server_local->card_removed && slot != -1) { struct slot_status_s *ss; if (!(slot >= 0 && slot < DIM(slot_table))) BUG (); ss = &slot_table[slot]; if (ss->valid && ss->any && (ss->status & 1)) flag = 'u'; } rc = assuan_send_data (ctx, &flag, 1); } else if (!strcmp (line, "reader_list")) { #ifdef HAVE_LIBUSB char *s = ccid_get_reader_list (); #else char *s = NULL; #endif if (s) rc = assuan_send_data (ctx, s, strlen (s)); else rc = gpg_error (GPG_ERR_NO_DATA); xfree (s); } else if (!strcmp (line, "deny_admin")) rc = opt.allow_admin? gpg_error (GPG_ERR_GENERAL) : 0; else if (!strcmp (line, "app_list")) { char *s = get_supported_applications (); if (s) rc = assuan_send_data (ctx, s, strlen (s)); else rc = 0; xfree (s); } else rc = set_error (GPG_ERR_ASS_PARAMETER, "unknown value for WHAT"); return rc; } static const char hlp_restart[] = "RESTART\n" "\n" "Restart the current connection; this is a kind of warm reset. It\n" "deletes the context used by this connection but does not send a\n" "RESET to the card. Thus the card itself won't get reset. \n" "\n" "This is used by gpg-agent to reuse a primary pipe connection and\n" "may be used by clients to backup from a conflict in the serial\n" "command; i.e. to select another application."; static gpg_error_t cmd_restart (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); (void)line; if (ctrl->app_ctx) { release_application (ctrl->app_ctx); ctrl->app_ctx = NULL; } if (locked_session && ctrl->server_local == locked_session) { locked_session = NULL; log_info ("implicitly unlocking due to RESTART\n"); } return 0; } static const char hlp_disconnect[] = "DISCONNECT\n" "\n" "Disconnect the card if it is not any longer used by other\n" "connections and the backend supports a disconnect operation."; static gpg_error_t cmd_disconnect (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); (void)line; ctrl->server_local->disconnect_allowed = 1; return 0; } static const char hlp_apdu[] = "APDU [--atr] [--more] [--exlen[=N]] [hexstring]\n" "\n" "Send an APDU to the current reader. This command bypasses the high\n" "level functions and sends the data directly to the card. HEXSTRING\n" "is expected to be a proper APDU. If HEXSTRING is not given no\n" "commands are set to the card but the command will implictly check\n" "whether the card is ready for use. \n" "\n" "Using the option \"--atr\" returns the ATR of the card as a status\n" "message before any data like this:\n" " S CARD-ATR 3BFA1300FF813180450031C173C00100009000B1\n" "\n" "Using the option --more handles the card status word MORE_DATA\n" "(61xx) and concatenates all reponses to one block.\n" "\n" "Using the option \"--exlen\" the returned APDU may use extended\n" "length up to N bytes. If N is not given a default value is used\n" "(currently 4096)."; static gpg_error_t cmd_apdu (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); int rc; unsigned char *apdu; size_t apdulen; int with_atr; int handle_more; const char *s; size_t exlen; with_atr = has_option (line, "--atr"); handle_more = has_option (line, "--more"); if ((s=has_option_name (line, "--exlen"))) { if (*s == '=') exlen = strtoul (s+1, NULL, 0); else exlen = 4096; } else exlen = 0; line = skip_options (line); if ( IS_LOCKED (ctrl) ) return gpg_error (GPG_ERR_LOCKED); if ((rc = open_card (ctrl, NULL))) return rc; if (with_atr) { unsigned char *atr; size_t atrlen; char hexbuf[400]; atr = apdu_get_atr (ctrl->reader_slot, &atrlen); if (!atr || atrlen > sizeof hexbuf - 2 ) { rc = gpg_error (GPG_ERR_INV_CARD); goto leave; } bin2hex (atr, atrlen, hexbuf); xfree (atr); send_status_info (ctrl, "CARD-ATR", hexbuf, strlen (hexbuf), NULL, 0); } apdu = hex_to_buffer (line, &apdulen); if (!apdu) { rc = gpg_error_from_syserror (); goto leave; } if (apdulen) { unsigned char *result = NULL; size_t resultlen; rc = apdu_send_direct (ctrl->reader_slot, exlen, apdu, apdulen, handle_more, &result, &resultlen); if (rc) log_error ("apdu_send_direct failed: %s\n", gpg_strerror (rc)); else { rc = assuan_send_data (ctx, result, resultlen); xfree (result); } } xfree (apdu); leave: TEST_CARD_REMOVAL (ctrl, rc); return rc; } static const char hlp_killscd[] = "KILLSCD\n" "\n" "Commit suicide."; static gpg_error_t cmd_killscd (assuan_context_t ctx, char *line) { ctrl_t ctrl = assuan_get_pointer (ctx); (void)line; ctrl->server_local->stopme = 1; return gpg_error (GPG_ERR_EOF); } /* Tell the assuan library about our commands */ static int register_commands (assuan_context_t ctx) { static struct { const char *name; assuan_handler_t handler; const char * const help; } table[] = { { "SERIALNO", cmd_serialno, hlp_serialno }, { "LEARN", cmd_learn, hlp_learn }, { "READCERT", cmd_readcert, hlp_readcert }, { "READKEY", cmd_readkey, hlp_readkey }, { "SETDATA", cmd_setdata, hlp_setdata }, { "PKSIGN", cmd_pksign, hlp_pksign }, { "PKAUTH", cmd_pkauth, hlp_pkauth }, { "PKDECRYPT", cmd_pkdecrypt,hlp_pkdecrypt }, { "INPUT", NULL }, { "OUTPUT", NULL }, { "GETATTR", cmd_getattr, hlp_getattr }, { "SETATTR", cmd_setattr, hlp_setattr }, { "WRITECERT", cmd_writecert,hlp_writecert }, { "WRITEKEY", cmd_writekey, hlp_writekey }, { "GENKEY", cmd_genkey, hlp_genkey }, { "RANDOM", cmd_random, hlp_random }, { "PASSWD", cmd_passwd, hlp_passwd }, { "CHECKPIN", cmd_checkpin, hlp_checkpin }, { "LOCK", cmd_lock, hlp_lock }, { "UNLOCK", cmd_unlock, hlp_unlock }, { "GETINFO", cmd_getinfo, hlp_getinfo }, { "RESTART", cmd_restart, hlp_restart }, { "DISCONNECT", cmd_disconnect,hlp_disconnect }, { "APDU", cmd_apdu, hlp_apdu }, { "KILLSCD", cmd_killscd, hlp_killscd }, { NULL } }; int i, rc; for (i=0; table[i].name; i++) { rc = assuan_register_command (ctx, table[i].name, table[i].handler, table[i].help); if (rc) return rc; } assuan_set_hello_line (ctx, "GNU Privacy Guard's Smartcard server ready"); assuan_register_reset_notify (ctx, reset_notify); assuan_register_option_handler (ctx, option_handler); return 0; } /* Startup the server. If FD is given as -1 this is simple pipe server, otherwise it is a regular server. Returns true if there are no more active asessions. */ int scd_command_handler (ctrl_t ctrl, int fd) { int rc; assuan_context_t ctx = NULL; int stopme; rc = assuan_new (&ctx); if (rc) { log_error ("failed to allocate assuan context: %s\n", gpg_strerror (rc)); scd_exit (2); } if (fd == -1) { assuan_fd_t filedes[2]; filedes[0] = assuan_fdopen (0); filedes[1] = assuan_fdopen (1); rc = assuan_init_pipe_server (ctx, filedes); } else { rc = assuan_init_socket_server (ctx, INT2FD(fd), ASSUAN_SOCKET_SERVER_ACCEPTED); } if (rc) { log_error ("failed to initialize the server: %s\n", gpg_strerror(rc)); scd_exit (2); } rc = register_commands (ctx); if (rc) { log_error ("failed to register commands with Assuan: %s\n", gpg_strerror(rc)); scd_exit (2); } assuan_set_pointer (ctx, ctrl); /* Allocate and initialize the server object. Put it into the list of active sessions. */ ctrl->server_local = xcalloc (1, sizeof *ctrl->server_local); ctrl->server_local->next_session = session_list; session_list = ctrl->server_local; ctrl->server_local->ctrl_backlink = ctrl; ctrl->server_local->assuan_ctx = ctx; if (DBG_ASSUAN) assuan_set_log_stream (ctx, log_get_stream ()); /* We open the reader right at startup so that the ticker is able to update the status file. */ if (ctrl->reader_slot == -1) { ctrl->reader_slot = get_reader_slot (); } /* Command processing loop. */ for (;;) { rc = assuan_accept (ctx); if (rc == -1) { break; } else if (rc) { log_info ("Assuan accept problem: %s\n", gpg_strerror (rc)); break; } rc = assuan_process (ctx); if (rc) { log_info ("Assuan processing failed: %s\n", gpg_strerror (rc)); continue; } } /* Cleanup. We don't send an explicit reset to the card. */ do_reset (ctrl, 0); /* Release the server object. */ if (session_list == ctrl->server_local) session_list = ctrl->server_local->next_session; else { struct server_local_s *sl; for (sl=session_list; sl->next_session; sl = sl->next_session) if (sl->next_session == ctrl->server_local) break; if (!sl->next_session) BUG (); sl->next_session = ctrl->server_local->next_session; } - stopme = ctrl->server_local->stopme || reader_disabled; + stopme = ctrl->server_local->stopme; xfree (ctrl->server_local); ctrl->server_local = NULL; /* Release the Assuan context. */ assuan_release (ctx); if (stopme) scd_exit (0); /* If there are no more sessions return true. */ return !session_list; } /* Send a line with status information via assuan and escape all given buffers. The variable elements are pairs of (char *, size_t), terminated with a (NULL, 0). */ void send_status_info (ctrl_t ctrl, const char *keyword, ...) { va_list arg_ptr; const unsigned char *value; size_t valuelen; char buf[950], *p; size_t n; assuan_context_t ctx = ctrl->server_local->assuan_ctx; va_start (arg_ptr, keyword); p = buf; n = 0; while ( (value = va_arg (arg_ptr, const unsigned char *)) ) { valuelen = va_arg (arg_ptr, size_t); if (!valuelen) continue; /* empty buffer */ if (n) { *p++ = ' '; n++; } for ( ; valuelen && n < DIM (buf)-2; n++, valuelen--, value++) { if (*value < ' ' || *value == '+') { sprintf (p, "%%%02X", *value); p += 3; } else if (*value == ' ') *p++ = '+'; else *p++ = *value; } } *p = 0; assuan_write_status (ctx, keyword, buf); va_end (arg_ptr); } /* Send a ready formatted status line via assuan. */ void send_status_direct (ctrl_t ctrl, const char *keyword, const char *args) { assuan_context_t ctx = ctrl->server_local->assuan_ctx; if (strchr (args, '\n')) log_error ("error: LF detected in status line - not sending\n"); else assuan_write_status (ctx, keyword, args); } /* Helper to send the clients a status change notification. */ static void send_client_notifications (void) { struct { pid_t pid; #ifdef HAVE_W32_SYSTEM HANDLE handle; #else int signo; #endif } killed[50]; int killidx = 0; int kidx; struct server_local_s *sl; for (sl=session_list; sl; sl = sl->next_session) { if (sl->event_signal && sl->assuan_ctx) { pid_t pid = assuan_get_pid (sl->assuan_ctx); #ifdef HAVE_W32_SYSTEM HANDLE handle = (void *)sl->event_signal; for (kidx=0; kidx < killidx; kidx++) if (killed[kidx].pid == pid && killed[kidx].handle == handle) break; if (kidx < killidx) log_info ("event %lx (%p) already triggered for client %d\n", sl->event_signal, handle, (int)pid); else { log_info ("triggering event %lx (%p) for client %d\n", sl->event_signal, handle, (int)pid); if (!SetEvent (handle)) log_error ("SetEvent(%lx) failed: %s\n", sl->event_signal, w32_strerror (-1)); if (killidx < DIM (killed)) { killed[killidx].pid = pid; killed[killidx].handle = handle; killidx++; } } #else /*!HAVE_W32_SYSTEM*/ int signo = sl->event_signal; if (pid != (pid_t)(-1) && pid && signo > 0) { for (kidx=0; kidx < killidx; kidx++) if (killed[kidx].pid == pid && killed[kidx].signo == signo) break; if (kidx < killidx) log_info ("signal %d already sent to client %d\n", signo, (int)pid); else { log_info ("sending signal %d to client %d\n", signo, (int)pid); kill (pid, signo); if (killidx < DIM (killed)) { killed[killidx].pid = pid; killed[killidx].signo = signo; killidx++; } } } #endif /*!HAVE_W32_SYSTEM*/ } } } /* This is the core of scd_update_reader_status_file but the caller needs to take care of the locking. */ static void update_reader_status_file (int set_card_removed_flag) { int idx; unsigned int status, changed; /* Note, that we only try to get the status, because it does not make sense to wait here for a operation to complete. If we are busy working with a card, delays in the status file update should be acceptable. */ for (idx=0; idx < DIM(slot_table); idx++) { struct slot_status_s *ss = slot_table + idx; struct server_local_s *sl; int sw_apdu; if (!ss->valid || ss->slot == -1) continue; /* Not valid or reader not yet open. */ sw_apdu = apdu_get_status (ss->slot, 0, &status, &changed); if (sw_apdu == SW_HOST_NO_READER) { /* Most likely the _reader_ has been unplugged. */ application_notify_card_reset (ss->slot); apdu_close_reader (ss->slot); ss->valid = 0; status = 0; changed = ss->changed; } else if (sw_apdu) { /* Get status failed. Ignore that. */ continue; } if (!ss->any || ss->status != status || ss->changed != changed ) { char *fname; char templ[50]; FILE *fp; log_info ("updating slot %d status: 0x%04X->0x%04X (%u->%u)\n", ss->slot, ss->status, status, ss->changed, changed); ss->status = status; ss->changed = changed; /* FIXME: Should this be IDX instead of ss->slot? This depends on how client sessions will associate the reader status with their session. */ snprintf (templ, sizeof templ, "reader_%d.status", ss->slot); fname = make_filename (opt.homedir, templ, NULL ); fp = fopen (fname, "w"); if (fp) { fprintf (fp, "%s\n", (status & 1)? "USABLE": (status & 4)? "ACTIVE": (status & 2)? "PRESENT": "NOCARD"); fclose (fp); } xfree (fname); /* If a status script is executable, run it. */ { const char *args[9], *envs[2]; char numbuf1[30], numbuf2[30], numbuf3[30]; char *homestr, *envstr; gpg_error_t err; homestr = make_filename (opt.homedir, NULL); if (estream_asprintf (&envstr, "GNUPGHOME=%s", homestr) < 0) log_error ("out of core while building environment\n"); else { envs[0] = envstr; envs[1] = NULL; sprintf (numbuf1, "%d", ss->slot); sprintf (numbuf2, "0x%04X", ss->status); sprintf (numbuf3, "0x%04X", status); args[0] = "--reader-port"; args[1] = numbuf1; args[2] = "--old-code"; args[3] = numbuf2; args[4] = "--new-code"; args[5] = numbuf3; args[6] = "--status"; args[7] = ((status & 1)? "USABLE": (status & 4)? "ACTIVE": (status & 2)? "PRESENT": "NOCARD"); args[8] = NULL; fname = make_filename (opt.homedir, "scd-event", NULL); err = gnupg_spawn_process_detached (fname, args, envs); if (err && gpg_err_code (err) != GPG_ERR_ENOENT) log_error ("failed to run event handler `%s': %s\n", fname, gpg_strerror (err)); xfree (fname); xfree (envstr); } xfree (homestr); } /* Set the card removed flag for all current sessions. We will set this on any card change because a reset or SERIALNO request must be done in any case. */ if (ss->any && set_card_removed_flag) update_card_removed (idx, 1); ss->any = 1; /* Send a signal to all clients who applied for it. */ send_client_notifications (); } /* Check whether a disconnect is pending. */ if (opt.card_timeout) { for (sl=session_list; sl; sl = sl->next_session) if (!sl->disconnect_allowed) break; if (session_list && !sl) { /* FIXME: Use a real timeout. */ /* At least one connection and all allow a disconnect. */ log_info ("disconnecting card in slot %d\n", ss->slot); apdu_disconnect (ss->slot); } } } } /* This function is called by the ticker thread to check for changes of the reader stati. It updates the reader status files and if requested by the caller also send a signal to the caller. */ void scd_update_reader_status_file (void) { if (!pth_mutex_acquire (&status_file_update_lock, 1, NULL)) return; /* locked - give up. */ update_reader_status_file (1); if (!pth_mutex_release (&status_file_update_lock)) log_error ("failed to release status_file_update lock\n"); } diff --git a/scd/sc-copykeys.c b/scd/sc-copykeys.c index b863b01b3..615e4b28a 100644 --- a/scd/sc-copykeys.c +++ b/scd/sc-copykeys.c @@ -1,717 +1,717 @@ /* sc-copykeys.c - A tool to store keys on a smartcard. * 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 . */ #include #include #include #include #include #include #include #include #define JNLIB_NEED_LOG_LOGV #include "scdaemon.h" #include #include "../common/ttyio.h" #include "../common/simple-pwquery.h" #include "apdu.h" /* for open_reader */ #include "atr.h" #include "app-common.h" #define _(a) (a) enum cmd_and_opt_values { oVerbose = 'v', oReaderPort = 500, octapiDriver, oDebug, oDebugAll, aTest }; static ARGPARSE_OPTS opts[] = { { 301, NULL, 0, "@Options:\n " }, { oVerbose, "verbose", 0, "verbose" }, { oReaderPort, "reader-port", 2, "|N|connect to reader at port N"}, { octapiDriver, "ctapi-driver", 2, "NAME|use NAME as ctAPI driver"}, { oDebug, "debug" ,4|16, "set debugging flags"}, { oDebugAll, "debug-all" ,0, "enable full debugging"}, {0} }; static void copykeys (APP app, const char *fname); static const char * my_strusage (int level) { const char *p; switch (level) { case 11: p = "sc-copykeys (GnuPG)"; break; case 13: p = VERSION; break; case 17: p = PRINTABLE_OS_NAME; break; case 19: p = _("Please report bugs to <@EMAIL@>.\n"); break; case 1: case 40: p = _("Usage: sc-copykeys [options] (-h for help)\n"); break; case 41: p = _("Syntax: sc-copykeys [options] " "file-with-key\n" "Copy keys to a smartcards\n"); break; default: p = NULL; } return p; } int main (int argc, char **argv ) { ARGPARSE_ARGS pargs; int slot, rc; const char *reader_port = NULL; struct app_ctx_s appbuf; memset (&appbuf, 0, sizeof appbuf); set_strusage (my_strusage); gcry_control (GCRYCTL_SUSPEND_SECMEM_WARN); log_set_prefix ("sc-copykeys", 1); /* check that the libraries are suitable. Do it here because the option parsing may need services of the library */ if (!gcry_check_version (NEED_LIBGCRYPT_VERSION) ) { log_fatal (_("%s is too old (need %s, have %s)\n"), "libgcrypt", NEED_LIBGCRYPT_VERSION, gcry_check_version (NULL) ); } setup_libgcrypt_logging (); gcry_control (GCRYCTL_DISABLE_SECMEM, 0); /* FIXME - we want to use it */ /* FIXME? gcry_control (GCRYCTL_USE_SECURE_RNDPOOL);*/ pargs.argc = &argc; pargs.argv = &argv; pargs.flags= 1; /* do not remove the args */ while (arg_parse (&pargs, opts) ) { switch (pargs.r_opt) { case oVerbose: opt.verbose++; break; case oDebug: opt.debug |= pargs.r.ret_ulong; break; case oDebugAll: opt.debug = ~0; break; case oReaderPort: reader_port = pargs.r.ret_str; break; case octapiDriver: opt.ctapi_driver = pargs.r.ret_str; break; default : pargs.err = 2; break; } } if (log_get_errorcount(0)) exit(2); if (argc != 1) usage (1); - slot = apdu_open_reader (reader_port, NULL); + slot = apdu_open_reader (reader_port); if (slot == -1) exit (1); if (apdu_connect (slot)) exit (1); /* FIXME: Use select_application. */ appbuf.slot = slot; rc = app_select_openpgp (&appbuf); if (rc) { log_error ("selecting openpgp failed: %s\n", gpg_strerror (rc)); exit (1); } appbuf.initialized = 1; log_info ("openpgp application selected\n"); copykeys (&appbuf, *argv); return 0; } void send_status_info (CTRL ctrl, const char *keyword, ...) { /* DUMMY */ } static char * read_file (const char *fname, size_t *r_length) { FILE *fp; struct stat st; char *buf; size_t buflen; fp = fname? fopen (fname, "rb") : stdin; if (!fp) { log_error ("can't open `%s': %s\n", fname? fname: "[stdin]", strerror (errno)); return NULL; } if (fstat (fileno(fp), &st)) { log_error ("can't stat `%s': %s\n", fname? fname: "[stdin]", strerror (errno)); if (fname) fclose (fp); return NULL; } buflen = st.st_size; buf = xmalloc (buflen+1); if (fread (buf, buflen, 1, fp) != 1) { log_error ("error reading `%s': %s\n", fname? fname: "[stdin]", strerror (errno)); if (fname) fclose (fp); xfree (buf); return NULL; } if (fname) fclose (fp); *r_length = buflen; return buf; } static gcry_sexp_t read_key (const char *fname) { char *buf; size_t buflen; gcry_sexp_t private; int rc; buf = read_file (fname, &buflen); if (!buf) return NULL; rc = gcry_sexp_new (&private, buf, buflen, 1); if (rc) { log_error ("gcry_sexp_new failed: %s\n", gpg_strerror (rc)); return NULL; } xfree (buf); return private; } static gcry_mpi_t * sexp_to_kparms (gcry_sexp_t sexp, unsigned long *created) { gcry_sexp_t list, l2; const char *name; const char *s; size_t n; int i, idx; const char *elems; gcry_mpi_t *array; *created = 0; list = gcry_sexp_find_token (sexp, "private-key", 0 ); if(!list) return NULL; /* quick hack to get the creation time. */ l2 = gcry_sexp_find_token (list, "created", 0); if (l2 && (name = gcry_sexp_nth_data (l2, 1, &n))) { char *tmp = xmalloc (n+1); memcpy (tmp, name, n); tmp[n] = 0; *created = strtoul (tmp, NULL, 10); xfree (tmp); } gcry_sexp_release (l2); l2 = gcry_sexp_cadr (list); gcry_sexp_release (list); list = l2; name = gcry_sexp_nth_data (list, 0, &n); if(!name || n != 3 || memcmp (name, "rsa", 3)) { gcry_sexp_release (list); return NULL; } /* Parameter names used with RSA. */ elems = "nedpqu"; array = xcalloc (strlen(elems) + 1, sizeof *array); for (idx=0, s=elems; *s; s++, idx++ ) { l2 = gcry_sexp_find_token (list, s, 1); if (!l2) { for (i=0; i 32) { log_error ("public exponent too large (more than 32 bits)\n"); goto failure; } nbits = gcry_mpi_get_nbits (rsa_p); if (nbits != 512) { log_error ("length of first RSA prime is not 512\n"); goto failure; } nbits = gcry_mpi_get_nbits (rsa_q); if (nbits != 512) { log_error ("length of second RSA prime is not 512\n"); goto failure; } nbits = gcry_mpi_get_nbits (rsa_n); if (nbits != 1024) { log_error ("length of RSA modulus is not 1024\n"); goto failure; } keyno = query_card (app); if (!keyno) goto failure; /* Build the private key template as described in section 4.3.3.6 of the specs. 0xC0 public exponent 0xC1 prime p 0xC2 prime q */ template = tp = xmalloc (1+2 + 1+1+4 + 1+1+64 + 1+1+64); *tp++ = 0xC0; *tp++ = 4; rc = gcry_mpi_print (GCRYMPI_FMT_USG, tp, 4, &n, rsa_e); if (rc) { log_error ("mpi_print failed: %s\n", gpg_strerror (rc)); goto failure; } assert (n <= 4); memcpy (e, tp, n); elen = n; if (n != 4) { memmove (tp+4-n, tp, 4-n); memset (tp, 0, 4-n); } tp += 4; *tp++ = 0xC1; *tp++ = 64; rc = gcry_mpi_print (GCRYMPI_FMT_USG, tp, 64, &n, rsa_p); if (rc) { log_error ("mpi_print failed: %s\n", gpg_strerror (rc)); goto failure; } assert (n == 64); tp += 64; *tp++ = 0xC2; *tp++ = 64; rc = gcry_mpi_print (GCRYMPI_FMT_USG, tp, 64, &n, rsa_q); if (rc) { log_error ("mpi_print failed: %s\n", gpg_strerror (rc)); goto failure; } assert (n == 64); tp += 64; assert (tp - template == 138); /* (we need the modulus to calculate the fingerprint) */ rc = gcry_mpi_print (GCRYMPI_FMT_USG, m, 128, &n, rsa_n); if (rc) { log_error ("mpi_print failed: %s\n", gpg_strerror (rc)); goto failure; } assert (n == 128); mlen = 128; rc = app_openpgp_storekey (app, keyno, template, tp - template, created_at, m, mlen, e, elen, pincb, NULL); if (rc) { log_error ("error storing key: %s\n", gpg_strerror (rc)); goto failure; } log_info ("key successfully stored\n"); { unsigned char *mm, *ee; size_t mmlen, eelen; int i; rc = app_openpgp_readkey (app, keyno, &mm, &mmlen, &ee, &eelen); if (rc) { log_error ("error reading key back: %s\n", gpg_strerror (rc)); goto failure; } /* Strip leading zeroes. */ for (i=0; i < mmlen && !mm[i]; i++) ; mmlen -= i; memmove (mm, mm+i, mmlen); for (i=0; i < eelen && !ee[i]; i++) ; eelen -= i; memmove (ee, ee+i, eelen); if (eelen != elen || mmlen != mlen) { log_error ("key parameter length mismatch (n=%u/%u, e=%u/%u)\n", (unsigned int)mlen, (unsigned int)mmlen, (unsigned int)elen, (unsigned int)eelen); xfree (mm); xfree (ee); goto failure; } if (memcmp (m, mm, mlen)) { log_error ("key parameter n mismatch\n"); log_printhex ("original n: ", m, mlen); log_printhex (" copied n: ", mm, mlen); xfree (mm); xfree (ee); goto failure; } if (memcmp (e, ee, elen)) { log_error ("key parameter e mismatch\n"); log_printhex ("original e: ", e, elen); log_printhex (" copied e: ", ee, elen); xfree (mm); xfree (ee); goto failure; } xfree (mm); xfree (ee); } gcry_mpi_release (rsa_e); gcry_mpi_release (rsa_p); gcry_mpi_release (rsa_q); gcry_mpi_release (rsa_n); return; failure: gcry_mpi_release (rsa_e); gcry_mpi_release (rsa_p); gcry_mpi_release (rsa_q); gcry_mpi_release (rsa_n); exit (1); }