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1290 lines
37 KiB
C
1290 lines
37 KiB
C
/* apdu.c - ISO 7816 APDU functions and low level I/O
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* Copyright (C) 2003 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#ifdef HAVE_OPENSC
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# include <opensc/opensc.h>
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#endif
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#if GNUPG_MAJOR_VERSION == 1
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/* This is used with GnuPG version < 1.9. The code has been source
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copied from the current GnuPG >= 1.9 and is maintained over
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there. */
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#include "options.h"
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#include "errors.h"
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#include "memory.h"
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#include "util.h"
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#include "i18n.h"
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#include "cardglue.h"
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#else /* GNUPG_MAJOR_VERSION != 1 */
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#include "scdaemon.h"
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#endif /* GNUPG_MAJOR_VERSION != 1 */
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#include "apdu.h"
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#include "dynload.h"
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#include "ccid-driver.h"
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#define MAX_READER 4 /* Number of readers we support concurrently. */
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#define CARD_CONNECT_TIMEOUT 1 /* Number of seconds to wait for
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insertion of the card (1 = don't wait). */
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#ifdef _WIN32
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#define DLSTDCALL __stdcall
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#else
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#define DLSTDCALL
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#endif
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/* A structure to collect information pertaining to one reader
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slot. */
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struct reader_table_s {
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int used; /* True if slot is used. */
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unsigned short port; /* Port number: 0 = unused, 1 - dev/tty */
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int is_ccid; /* Uses the internal CCID driver. */
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struct {
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ccid_driver_t handle;
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} ccid;
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int is_ctapi; /* This is a ctAPI driver. */
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struct {
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unsigned long context;
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unsigned long card;
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unsigned long protocol;
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} pcsc;
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#ifdef HAVE_OPENSC
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int is_osc; /* We are using the OpenSC driver layer. */
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struct {
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struct sc_context *ctx;
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struct sc_card *scard;
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} osc;
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#endif /*HAVE_OPENSC*/
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int status;
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unsigned char atr[33];
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size_t atrlen;
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};
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typedef struct reader_table_s *reader_table_t;
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/* A global table to keep track of active readers. */
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static struct reader_table_s reader_table[MAX_READER];
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/* ct API function pointer. */
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static char (* DLSTDCALL CT_init) (unsigned short ctn, unsigned short Pn);
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static char (* DLSTDCALL CT_data) (unsigned short ctn, unsigned char *dad,
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unsigned char *sad, unsigned short lc,
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unsigned char *cmd, unsigned short *lr,
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unsigned char *rsp);
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static char (* DLSTDCALL CT_close) (unsigned short ctn);
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/* PC/SC constants and function pointer. */
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#define PCSC_SCOPE_USER 0
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#define PCSC_SCOPE_TERMINAL 1
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#define PCSC_SCOPE_SYSTEM 2
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#define PCSC_SCOPE_GLOBAL 3
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#define PCSC_PROTOCOL_T0 1
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#define PCSC_PROTOCOL_T1 2
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#define PCSC_PROTOCOL_RAW 4
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#define PCSC_SHARE_EXCLUSIVE 1
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#define PCSC_SHARE_SHARED 2
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#define PCSC_SHARE_DIRECT 3
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#define PCSC_LEAVE_CARD 0
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#define PCSC_RESET_CARD 1
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#define PCSC_UNPOWER_CARD 2
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#define PCSC_EJECT_CARD 3
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struct pcsc_io_request_s {
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unsigned long protocol;
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unsigned long pci_len;
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};
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typedef struct pcsc_io_request_s *pcsc_io_request_t;
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long (* DLSTDCALL pcsc_establish_context) (unsigned long scope,
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const void *reserved1,
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const void *reserved2,
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unsigned long *r_context);
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long (* DLSTDCALL pcsc_release_context) (unsigned long context);
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long (* DLSTDCALL pcsc_list_readers) (unsigned long context,
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const char *groups,
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char *readers, unsigned long*readerslen);
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long (* DLSTDCALL pcsc_connect) (unsigned long context,
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const char *reader,
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unsigned long share_mode,
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unsigned long preferred_protocols,
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unsigned long *r_card,
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unsigned long *r_active_protocol);
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long (* DLSTDCALL pcsc_disconnect) (unsigned long card,
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unsigned long disposition);
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long (* DLSTDCALL pcsc_status) (unsigned long card,
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char *reader, unsigned long *readerlen,
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unsigned long *r_state,
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unsigned long *r_protocol,
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unsigned char *atr, unsigned long *atrlen);
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long (* DLSTDCALL pcsc_begin_transaction) (unsigned long card);
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long (* DLSTDCALL pcsc_end_transaction) (unsigned long card);
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long (* DLSTDCALL pcsc_transmit) (unsigned long card,
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const pcsc_io_request_t send_pci,
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const unsigned char *send_buffer,
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unsigned long send_len,
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pcsc_io_request_t recv_pci,
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unsigned char *recv_buffer,
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unsigned long *recv_len);
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long (* DLSTDCALL pcsc_set_timeout) (unsigned long context,
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unsigned long timeout);
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/*
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Helper
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*/
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/* Find an unused reader slot for PORTSTR and put it into the reader
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table. Return -1 on error or the index into the reader table. */
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static int
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new_reader_slot (void)
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{
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int i, reader = -1;
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for (i=0; i < MAX_READER; i++)
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{
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if (!reader_table[i].used && reader == -1)
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reader = i;
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}
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if (reader == -1)
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{
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log_error ("new_reader_slot: out of slots\n");
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return -1;
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}
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reader_table[reader].used = 1;
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reader_table[reader].is_ccid = 0;
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reader_table[reader].is_ctapi = 0;
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#ifdef HAVE_OPENSC
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reader_table[reader].is_osc = 0;
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#endif
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return reader;
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}
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static void
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dump_reader_status (int reader)
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{
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if (reader_table[reader].is_ccid)
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log_info ("reader slot %d: using ccid driver\n", reader);
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else if (reader_table[reader].is_ctapi)
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{
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log_info ("reader slot %d: %s\n", reader,
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reader_table[reader].status == 1? "Processor ICC present" :
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reader_table[reader].status == 0? "Memory ICC present" :
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"ICC not present" );
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}
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else
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{
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log_info ("reader slot %d: active protocol:", reader);
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if ((reader_table[reader].pcsc.protocol & PCSC_PROTOCOL_T0))
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log_printf (" T0");
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else if ((reader_table[reader].pcsc.protocol & PCSC_PROTOCOL_T1))
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log_printf (" T1");
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else if ((reader_table[reader].pcsc.protocol & PCSC_PROTOCOL_RAW))
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log_printf (" raw");
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log_printf ("\n");
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}
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if (reader_table[reader].status != -1)
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{
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log_info ("reader %d: ATR=", reader);
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log_printhex ("", reader_table[reader].atr,
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reader_table[reader].atrlen);
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}
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}
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/*
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ct API Interface
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*/
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static const char *
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ct_error_string (long err)
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{
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switch (err)
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{
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case 0: return "okay";
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case -1: return "invalid data";
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case -8: return "ct error";
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case -10: return "transmission error";
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case -11: return "memory allocation error";
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case -128: return "HTSI error";
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default: return "unknown CT-API error";
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}
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}
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/* Wait for the card in READER and activate it. Return -1 on error or
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0 on success. */
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static int
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ct_activate_card (int reader)
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{
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int rc, count;
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for (count = 0; count < CARD_CONNECT_TIMEOUT; count++)
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{
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unsigned char dad[1], sad[1], cmd[11], buf[256];
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unsigned short buflen;
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if (count)
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; /* FIXME: we should use a more reliable timer than sleep. */
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/* Check whether card has been inserted. */
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dad[0] = 1; /* Destination address: CT. */
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sad[0] = 2; /* Source address: Host. */
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cmd[0] = 0x20; /* Class byte. */
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cmd[1] = 0x13; /* Request status. */
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cmd[2] = 0x00; /* From kernel. */
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cmd[3] = 0x80; /* Return card's DO. */
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cmd[4] = 0x00;
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buflen = DIM(buf);
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rc = CT_data (reader, dad, sad, 5, cmd, &buflen, buf);
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if (rc || buflen < 2 || buf[buflen-2] != 0x90)
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{
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log_error ("ct_activate_card: can't get status of reader %d: %s\n",
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reader, ct_error_string (rc));
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return -1;
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}
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/* Connected, now activate the card. */
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dad[0] = 1; /* Destination address: CT. */
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sad[0] = 2; /* Source address: Host. */
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cmd[0] = 0x20; /* Class byte. */
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cmd[1] = 0x12; /* Request ICC. */
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cmd[2] = 0x01; /* From first interface. */
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cmd[3] = 0x01; /* Return card's ATR. */
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cmd[4] = 0x00;
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buflen = DIM(buf);
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rc = CT_data (reader, dad, sad, 5, cmd, &buflen, buf);
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if (rc || buflen < 2 || buf[buflen-2] != 0x90)
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{
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log_error ("ct_activate_card(%d): activation failed: %s\n",
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reader, ct_error_string (rc));
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if (!rc)
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log_printhex (" received data:", buf, buflen);
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return -1;
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}
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/* Store the type and the ATR. */
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if (buflen - 2 > DIM (reader_table[0].atr))
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{
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log_error ("ct_activate_card(%d): ATR too long\n", reader);
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return -1;
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}
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reader_table[reader].status = buf[buflen - 1];
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memcpy (reader_table[reader].atr, buf, buflen - 2);
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reader_table[reader].atrlen = buflen - 2;
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return 0;
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}
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log_info ("ct_activate_card(%d): timeout waiting for card\n", reader);
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return -1;
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}
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/* Open a reader and return an internal handle for it. PORT is a
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non-negative value with the port number of the reader. USB readers
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do have port numbers starting at 32769. */
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static int
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open_ct_reader (int port)
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{
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int rc, reader;
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if (port < 0 || port > 0xffff)
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{
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log_error ("open_ct_reader: invalid port %d requested\n", port);
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return -1;
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}
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reader = new_reader_slot ();
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if (reader == -1)
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return reader;
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reader_table[reader].port = port;
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rc = CT_init (reader, (unsigned short)port);
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if (rc)
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{
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log_error ("apdu_open_ct_reader failed on port %d: %s\n",
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port, ct_error_string (rc));
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reader_table[reader].used = 0;
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return -1;
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}
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rc = ct_activate_card (reader);
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if (rc)
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{
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reader_table[reader].used = 0;
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return -1;
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}
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reader_table[reader].is_ctapi = 1;
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dump_reader_status (reader);
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return reader;
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}
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static int
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close_ct_reader (int slot)
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{
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/* FIXME: Implement. */
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reader_table[slot].used = 0;
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return 0;
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}
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/* Actually send the APDU of length APDULEN to SLOT and return a
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maximum of *BUFLEN data in BUFFER, the actual retruned size will be
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set to BUFLEN. Returns: CT API error code. */
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static int
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ct_send_apdu (int slot, unsigned char *apdu, size_t apdulen,
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unsigned char *buffer, size_t *buflen)
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{
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int rc;
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unsigned char dad[1], sad[1];
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unsigned short ctbuflen;
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dad[0] = 0; /* Destination address: Card. */
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sad[0] = 2; /* Source address: Host. */
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ctbuflen = *buflen;
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if (DBG_CARD_IO)
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log_printhex (" CT_data:", apdu, apdulen);
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rc = CT_data (slot, dad, sad, apdulen, apdu, &ctbuflen, buffer);
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*buflen = ctbuflen;
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/* FIXME: map the errorcodes to GNUPG ones, so that they can be
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shared between CTAPI and PCSC. */
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return rc;
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}
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static const char *
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pcsc_error_string (long err)
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{
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const char *s;
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if (!err)
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return "okay";
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if ((err & 0x80100000) != 0x80100000)
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return "invalid PC/SC error code";
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err &= 0xffff;
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switch (err)
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{
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case 0x0002: s = "cancelled"; break;
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case 0x000e: s = "can't dispose"; break;
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case 0x0008: s = "insufficient buffer"; break;
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case 0x0015: s = "invalid ATR"; break;
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case 0x0003: s = "invalid handle"; break;
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case 0x0004: s = "invalid parameter"; break;
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case 0x0005: s = "invalid target"; break;
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case 0x0011: s = "invalid value"; break;
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case 0x0006: s = "no memory"; break;
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case 0x0013: s = "comm error"; break;
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case 0x0001: s = "internal error"; break;
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case 0x0014: s = "unknown error"; break;
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case 0x0007: s = "waited too long"; break;
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case 0x0009: s = "unknown reader"; break;
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case 0x000a: s = "timeout"; break;
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case 0x000b: s = "sharing violation"; break;
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case 0x000c: s = "no smartcard"; break;
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case 0x000d: s = "unknown card"; break;
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case 0x000f: s = "proto mismatch"; break;
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case 0x0010: s = "not ready"; break;
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case 0x0012: s = "system cancelled"; break;
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case 0x0016: s = "not transacted"; break;
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case 0x0017: s = "reader unavailable"; break;
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case 0x0065: s = "unsupported card"; break;
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case 0x0066: s = "unresponsive card"; break;
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case 0x0067: s = "unpowered card"; break;
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case 0x0068: s = "reset card"; break;
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case 0x0069: s = "removed card"; break;
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case 0x006a: s = "inserted card"; break;
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case 0x001f: s = "unsupported feature"; break;
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||
case 0x0019: s = "PCI too small"; break;
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case 0x001a: s = "reader unsupported"; break;
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case 0x001b: s = "duplicate reader"; break;
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case 0x001c: s = "card unsupported"; break;
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case 0x001d: s = "no service"; break;
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case 0x001e: s = "service stopped"; break;
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||
default: s = "unknown PC/SC error code"; break;
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}
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||
return s;
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||
}
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||
|
||
/*
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||
PC/SC Interface
|
||
*/
|
||
|
||
static int
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||
open_pcsc_reader (const char *portstr)
|
||
{
|
||
long err;
|
||
int slot;
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||
char *list = NULL;
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||
unsigned long nreader, listlen, atrlen;
|
||
char *p;
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||
unsigned long card_state, card_protocol;
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slot = new_reader_slot ();
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if (slot == -1)
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return -1;
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err = pcsc_establish_context (PCSC_SCOPE_SYSTEM, NULL, NULL,
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&reader_table[slot].pcsc.context);
|
||
if (err)
|
||
{
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log_error ("pcsc_establish_context failed: %s (0x%lx)\n",
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pcsc_error_string (err), err);
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reader_table[slot].used = 0;
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return -1;
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}
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err = pcsc_list_readers (reader_table[slot].pcsc.context,
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NULL, NULL, &nreader);
|
||
if (!err)
|
||
{
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||
list = xtrymalloc (nreader+1); /* Better add 1 for safety reasons. */
|
||
if (!list)
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||
{
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log_error ("error allocating memory for reader list\n");
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pcsc_release_context (reader_table[slot].pcsc.context);
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reader_table[slot].used = 0;
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return -1;
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}
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||
err = pcsc_list_readers (reader_table[slot].pcsc.context,
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||
NULL, list, &nreader);
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||
}
|
||
if (err)
|
||
{
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||
log_error ("pcsc_list_readers failed: %s (0x%lx)\n",
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||
pcsc_error_string (err), err);
|
||
pcsc_release_context (reader_table[slot].pcsc.context);
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||
reader_table[slot].used = 0;
|
||
xfree (list);
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||
return -1;
|
||
}
|
||
|
||
listlen = nreader;
|
||
p = list;
|
||
while (nreader)
|
||
{
|
||
if (!*p && !p[1])
|
||
break;
|
||
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;
|
||
}
|
||
|
||
err = pcsc_connect (reader_table[slot].pcsc.context,
|
||
portstr? portstr : list,
|
||
PCSC_SHARE_EXCLUSIVE,
|
||
PCSC_PROTOCOL_T0|PCSC_PROTOCOL_T1,
|
||
&reader_table[slot].pcsc.card,
|
||
&reader_table[slot].pcsc.protocol);
|
||
if (err)
|
||
{
|
||
log_error ("pcsc_connect 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);
|
||
return -1;
|
||
}
|
||
|
||
atrlen = 32;
|
||
/* (We need to pass a dummy buffer. We use LIST because it ought to
|
||
be large enough.) */
|
||
err = pcsc_status (reader_table[slot].pcsc.card,
|
||
list, &listlen,
|
||
&card_state, &card_protocol,
|
||
reader_table[slot].atr, &atrlen);
|
||
xfree (list);
|
||
if (err)
|
||
{
|
||
log_error ("pcsc_status failed: %s (0x%lx)\n",
|
||
pcsc_error_string (err), err);
|
||
pcsc_release_context (reader_table[slot].pcsc.context);
|
||
reader_table[slot].used = 0;
|
||
return -1;
|
||
}
|
||
if (atrlen >= DIM (reader_table[0].atr))
|
||
log_bug ("ATR returned by pcsc_status is too large\n");
|
||
reader_table[slot].atrlen = atrlen;
|
||
/* log_debug ("state from pcsc_status: 0x%lx\n", card_state); */
|
||
/* log_debug ("protocol from pcsc_status: 0x%lx\n", card_protocol); */
|
||
|
||
dump_reader_status (slot);
|
||
return slot;
|
||
}
|
||
|
||
|
||
/* 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: CT API error code. */
|
||
static int
|
||
pcsc_send_apdu (int slot, unsigned char *apdu, size_t apdulen,
|
||
unsigned char *buffer, size_t *buflen)
|
||
{
|
||
long err;
|
||
struct pcsc_io_request_s send_pci;
|
||
unsigned long recv_len;
|
||
|
||
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 err? -1:0; /* FIXME: Return appropriate error code. */
|
||
}
|
||
|
||
static int
|
||
close_pcsc_reader (int slot)
|
||
{
|
||
/* FIXME: Implement. */
|
||
reader_table[slot].used = 0;
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
|
||
|
||
#ifdef HAVE_LIBUSB
|
||
/*
|
||
Internal CCID driver interface.
|
||
*/
|
||
|
||
static int
|
||
open_ccid_reader (void)
|
||
{
|
||
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, 0);
|
||
if (err)
|
||
{
|
||
slotp->used = 0;
|
||
return -1;
|
||
}
|
||
|
||
err = ccid_get_atr (slotp->ccid.handle,
|
||
slotp->atr, sizeof slotp->atr, &slotp->atrlen);
|
||
if (err)
|
||
{
|
||
slotp->used = 0;
|
||
return -1;
|
||
}
|
||
|
||
slotp->is_ccid = 1;
|
||
|
||
dump_reader_status (slot);
|
||
return slot;
|
||
}
|
||
|
||
static int
|
||
close_ccid_reader (int slot)
|
||
{
|
||
ccid_close_reader (reader_table[slot].ccid.handle);
|
||
reader_table[slot].used = 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)
|
||
{
|
||
long err;
|
||
size_t maxbuflen;
|
||
|
||
if (DBG_CARD_IO)
|
||
log_printhex (" APDU_data:", apdu, apdulen);
|
||
|
||
maxbuflen = *buflen;
|
||
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? -1:0; /* FIXME: Return appropriate error code. */
|
||
}
|
||
|
||
#endif /* HAVE_LIBUSB */
|
||
|
||
|
||
|
||
#ifdef HAVE_OPENSC
|
||
/*
|
||
OpenSC Interface.
|
||
|
||
This uses the OpenSC primitives to send APDUs. We need this
|
||
because we can't mix OpenSC and native (i.e. ctAPI or PC/SC)
|
||
access to a card for resource conflict reasons.
|
||
*/
|
||
|
||
static int
|
||
open_osc_reader (int portno)
|
||
{
|
||
int err;
|
||
int slot;
|
||
reader_table_t slotp;
|
||
|
||
slot = new_reader_slot ();
|
||
if (slot == -1)
|
||
return -1;
|
||
slotp = reader_table + slot;
|
||
|
||
err = sc_establish_context (&slotp->osc.ctx, "scdaemon");
|
||
if (err)
|
||
{
|
||
log_error ("failed to establish SC context: %s\n", sc_strerror (err));
|
||
slotp->used = 0;
|
||
return -1;
|
||
}
|
||
if (portno < 0 || portno >= slotp->osc.ctx->reader_count)
|
||
{
|
||
log_error ("no card reader available\n");
|
||
sc_release_context (slotp->osc.ctx);
|
||
slotp->used = 0;
|
||
return -1;
|
||
}
|
||
|
||
/* Redirect to our logging facility. */
|
||
slotp->osc.ctx->error_file = log_get_stream ();
|
||
slotp->osc.ctx->debug = opt.debug_sc;
|
||
slotp->osc.ctx->debug_file = log_get_stream ();
|
||
|
||
if (sc_detect_card_presence (slotp->osc.ctx->reader[portno], 0) != 1)
|
||
{
|
||
log_error ("no card present\n");
|
||
sc_release_context (slotp->osc.ctx);
|
||
slotp->used = 0;
|
||
return -1;
|
||
}
|
||
|
||
/* We want the standard ISO driver. */
|
||
/*FIXME: OpenSC does not like "iso7816", so we use EMV for now. */
|
||
err = sc_set_card_driver(slotp->osc.ctx, "emv");
|
||
if (err)
|
||
{
|
||
log_error ("failed to select the iso7816 driver: %s\n",
|
||
sc_strerror (err));
|
||
sc_release_context (slotp->osc.ctx);
|
||
slotp->used = 0;
|
||
return -1;
|
||
}
|
||
|
||
/* Now connect the card and hope that OpenSC won't try to be too
|
||
smart. */
|
||
err = sc_connect_card (slotp->osc.ctx->reader[portno], 0,
|
||
&slotp->osc.scard);
|
||
if (err)
|
||
{
|
||
log_error ("failed to connect card in reader %d: %s\n",
|
||
portno, sc_strerror (err));
|
||
sc_release_context (slotp->osc.ctx);
|
||
slotp->used = 0;
|
||
return -1;
|
||
}
|
||
if (opt.verbose)
|
||
log_info ("connected to card in opensc reader %d using driver `%s'\n",
|
||
portno, slotp->osc.scard->driver->name);
|
||
|
||
err = sc_lock (slotp->osc.scard);
|
||
if (err)
|
||
{
|
||
log_error ("can't lock card in reader %d: %s\n",
|
||
portno, sc_strerror (err));
|
||
sc_disconnect_card (slotp->osc.scard, 0);
|
||
sc_release_context (slotp->osc.ctx);
|
||
slotp->used = 0;
|
||
return -1;
|
||
}
|
||
|
||
if (slotp->osc.scard->atr_len >= DIM (slotp->atr))
|
||
log_bug ("ATR returned by opensc is too large\n");
|
||
slotp->atrlen = slotp->osc.scard->atr_len;
|
||
memcpy (slotp->atr, slotp->osc.scard->atr, slotp->atrlen);
|
||
|
||
slotp->is_osc = 1;
|
||
|
||
dump_reader_status (slot);
|
||
return slot;
|
||
}
|
||
|
||
|
||
static int
|
||
close_osc_reader (int slot)
|
||
{
|
||
/* FIXME: Implement. */
|
||
reader_table[slot].used = 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: OpenSC error code. */
|
||
static int
|
||
osc_send_apdu (int slot, unsigned char *apdu, size_t apdulen,
|
||
unsigned char *buffer, size_t *buflen)
|
||
{
|
||
long err;
|
||
struct sc_apdu a;
|
||
unsigned char data[SC_MAX_APDU_BUFFER_SIZE];
|
||
unsigned char result[SC_MAX_APDU_BUFFER_SIZE];
|
||
|
||
if (DBG_CARD_IO)
|
||
log_printhex (" APDU_data:", apdu, apdulen);
|
||
|
||
if (apdulen < 4)
|
||
{
|
||
log_error ("osc_send_apdu: APDU is too short\n");
|
||
return SC_ERROR_CMD_TOO_SHORT;
|
||
}
|
||
|
||
memset(&a, 0, sizeof a);
|
||
a.cla = *apdu++;
|
||
a.ins = *apdu++;
|
||
a.p1 = *apdu++;
|
||
a.p2 = *apdu++;
|
||
apdulen -= 4;
|
||
|
||
if (!apdulen)
|
||
a.cse = SC_APDU_CASE_1;
|
||
else if (apdulen == 1)
|
||
{
|
||
a.le = *apdu? *apdu : 256;
|
||
apdu++; apdulen--;
|
||
a.cse = SC_APDU_CASE_2_SHORT;
|
||
}
|
||
else
|
||
{
|
||
a.lc = *apdu++; apdulen--;
|
||
if (apdulen < a.lc)
|
||
{
|
||
log_error ("osc_send_apdu: APDU shorter than specified in Lc\n");
|
||
return SC_ERROR_CMD_TOO_SHORT;
|
||
|
||
}
|
||
memcpy(data, apdu, a.lc);
|
||
apdu += a.lc; apdulen -= a.lc;
|
||
|
||
a.data = data;
|
||
a.datalen = a.lc;
|
||
|
||
if (!apdulen)
|
||
a.cse = SC_APDU_CASE_3_SHORT;
|
||
else
|
||
{
|
||
a.le = *apdu? *apdu : 256;
|
||
apdu++; apdulen--;
|
||
if (apdulen)
|
||
{
|
||
log_error ("osc_send_apdu: APDU larger than specified\n");
|
||
return SC_ERROR_CMD_TOO_LONG;
|
||
}
|
||
a.cse = SC_APDU_CASE_4_SHORT;
|
||
}
|
||
}
|
||
|
||
a.resp = result;
|
||
a.resplen = DIM(result);
|
||
|
||
err = sc_transmit_apdu (reader_table[slot].osc.scard, &a);
|
||
if (err)
|
||
{
|
||
log_error ("sc_apdu_transmit failed: %s\n", sc_strerror (err));
|
||
return err;
|
||
}
|
||
|
||
if (*buflen < 2 || a.resplen > *buflen - 2)
|
||
{
|
||
log_error ("osc_send_apdu: provided buffer too short to store result\n");
|
||
return SC_ERROR_BUFFER_TOO_SMALL;
|
||
}
|
||
memcpy (buffer, a.resp, a.resplen);
|
||
buffer[a.resplen] = a.sw1;
|
||
buffer[a.resplen+1] = a.sw2;
|
||
*buflen = a.resplen + 2;
|
||
return 0;
|
||
}
|
||
|
||
#endif /* HAVE_OPENSC */
|
||
|
||
|
||
|
||
/*
|
||
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). If
|
||
OpenSC support is compiled in, we first try to use OpenSC. */
|
||
int
|
||
apdu_open_reader (const char *portstr)
|
||
{
|
||
static int pcsc_api_loaded, ct_api_loaded;
|
||
|
||
#ifdef HAVE_LIBUSB
|
||
if (!opt.disable_ccid)
|
||
{
|
||
int slot;
|
||
|
||
slot = open_ccid_reader ();
|
||
if (slot != -1)
|
||
return slot; /* got one */
|
||
}
|
||
#endif /* HAVE_LIBUSB */
|
||
|
||
#ifdef HAVE_OPENSC
|
||
if (!opt.disable_opensc)
|
||
{
|
||
int port = portstr? atoi (portstr) : 0;
|
||
|
||
return open_osc_reader (port);
|
||
}
|
||
#endif /* HAVE_OPENSC */
|
||
|
||
|
||
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",
|
||
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)
|
||
{
|
||
void *handle;
|
||
|
||
handle = dlopen (opt.pcsc_driver, RTLD_LAZY);
|
||
if (!handle)
|
||
{
|
||
log_error ("apdu_open_reader: failed to open driver `%s': %s",
|
||
opt.pcsc_driver, dlerror ());
|
||
return -1;
|
||
}
|
||
|
||
pcsc_establish_context = dlsym (handle, "SCardEstablishContext");
|
||
pcsc_release_context = dlsym (handle, "SCardReleaseContext");
|
||
pcsc_list_readers = dlsym (handle, "SCardListReaders");
|
||
#ifdef _WIN32
|
||
if (!pcsc_list_readers)
|
||
pcsc_list_readers = dlsym (handle, "SCardListReadersA");
|
||
#endif
|
||
pcsc_connect = dlsym (handle, "SCardConnect");
|
||
#ifdef _WIN32
|
||
if (!pcsc_connect)
|
||
pcsc_connect = dlsym (handle, "SCardConnectA");
|
||
#endif
|
||
pcsc_disconnect = dlsym (handle, "SCardDisconnect");
|
||
pcsc_status = dlsym (handle, "SCardStatus");
|
||
#ifdef _WIN32
|
||
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");
|
||
|
||
if (!pcsc_establish_context
|
||
|| !pcsc_release_context
|
||
|| !pcsc_list_readers
|
||
|| !pcsc_connect
|
||
|| !pcsc_disconnect
|
||
|| !pcsc_status
|
||
|| !pcsc_begin_transaction
|
||
|| !pcsc_end_transaction
|
||
|| !pcsc_transmit
|
||
/* || !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)\n",
|
||
!!pcsc_establish_context,
|
||
!!pcsc_release_context,
|
||
!!pcsc_list_readers,
|
||
!!pcsc_connect,
|
||
!!pcsc_disconnect,
|
||
!!pcsc_status,
|
||
!!pcsc_begin_transaction,
|
||
!!pcsc_end_transaction,
|
||
!!pcsc_transmit,
|
||
!!pcsc_set_timeout );
|
||
dlclose (handle);
|
||
return -1;
|
||
}
|
||
pcsc_api_loaded = 1;
|
||
}
|
||
|
||
return open_pcsc_reader (portstr);
|
||
}
|
||
|
||
|
||
int
|
||
apdu_close_reader (int slot)
|
||
{
|
||
if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used )
|
||
return SW_HOST_NO_DRIVER;
|
||
if (reader_table[slot].is_ctapi)
|
||
return close_ct_reader (slot);
|
||
#ifdef HAVE_LIBUSB
|
||
else if (reader_table[slot].is_ccid)
|
||
return close_ccid_reader (slot);
|
||
#endif
|
||
#ifdef HAVE_OPENSC
|
||
else if (reader_table[slot].is_osc)
|
||
return close_osc_reader (slot);
|
||
#endif
|
||
else
|
||
return close_pcsc_reader (slot);
|
||
}
|
||
|
||
|
||
unsigned char *
|
||
apdu_get_atr (int slot, size_t *atrlen)
|
||
{
|
||
char *buf;
|
||
|
||
if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used )
|
||
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;
|
||
}
|
||
|
||
|
||
static const char *
|
||
error_string (int slot, long rc)
|
||
{
|
||
if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used )
|
||
return "[invalid slot]";
|
||
if (reader_table[slot].is_ctapi)
|
||
return ct_error_string (rc);
|
||
#ifdef HAVE_LIBUSB
|
||
else if (reader_table[slot].is_ccid)
|
||
return "no CCID driver error strings yet";
|
||
#endif
|
||
#ifdef HAVE_OPENSC
|
||
else if (reader_table[slot].is_osc)
|
||
return sc_strerror (rc);
|
||
#endif
|
||
else
|
||
return pcsc_error_string (rc);
|
||
}
|
||
|
||
|
||
/* Dispatcher for the actual send_apdu fucntion. */
|
||
static int
|
||
send_apdu (int slot, unsigned char *apdu, size_t apdulen,
|
||
unsigned char *buffer, size_t *buflen)
|
||
{
|
||
if (slot < 0 || slot >= MAX_READER || !reader_table[slot].used )
|
||
return SW_HOST_NO_DRIVER;
|
||
if (reader_table[slot].is_ctapi)
|
||
return ct_send_apdu (slot, apdu, apdulen, buffer, buflen);
|
||
#ifdef HAVE_LIBUSB
|
||
else if (reader_table[slot].is_ccid)
|
||
return send_apdu_ccid (slot, apdu, apdulen, buffer, buflen);
|
||
#endif
|
||
#ifdef HAVE_OPENSC
|
||
else if (reader_table[slot].is_osc)
|
||
return osc_send_apdu (slot, apdu, apdulen, buffer, buflen);
|
||
#endif
|
||
else
|
||
return pcsc_send_apdu (slot, apdu, apdulen, buffer, buflen);
|
||
}
|
||
|
||
/* 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. 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 class, int ins, int p0, int p1,
|
||
int lc, const char *data, int le,
|
||
unsigned char **retbuf, size_t *retbuflen)
|
||
{
|
||
unsigned char result[256+10]; /* 10 extra in case of bugs in the driver. */
|
||
size_t resultlen = 256;
|
||
unsigned char apdu[5+256+1];
|
||
size_t apdulen;
|
||
int sw;
|
||
long rc; /* we need a long here due to PC/SC. */
|
||
|
||
if (DBG_CARD_IO)
|
||
log_debug ("send apdu: c=%02X i=%02X p0=%02X p1=%02X lc=%d le=%d\n",
|
||
class, ins, p0, p1, lc, le);
|
||
|
||
if (lc != -1 && (lc > 255 || lc < 0))
|
||
return SW_WRONG_LENGTH;
|
||
if (le != -1 && (le > 256 || le < 1))
|
||
return SW_WRONG_LENGTH;
|
||
if ((!data && lc != -1) || (data && lc == -1))
|
||
return SW_HOST_INV_VALUE;
|
||
|
||
apdulen = 0;
|
||
apdu[apdulen++] = class;
|
||
apdu[apdulen++] = ins;
|
||
apdu[apdulen++] = p0;
|
||
apdu[apdulen++] = p1;
|
||
if (lc != -1)
|
||
{
|
||
apdu[apdulen++] = lc;
|
||
memcpy (apdu+apdulen, data, lc);
|
||
apdulen += lc;
|
||
}
|
||
if (le != -1)
|
||
apdu[apdulen++] = le; /* Truncation is okay becuase 0 means 256. */
|
||
assert (sizeof (apdu) >= apdulen);
|
||
/* As safeguard don't pass any garbage from the stack to the driver. */
|
||
memset (apdu+apdulen, 0, sizeof (apdu) - apdulen);
|
||
rc = send_apdu (slot, apdu, apdulen, result, &resultlen);
|
||
if (rc || resultlen < 2)
|
||
{
|
||
log_error ("apdu_send_simple(%d) failed: %s\n",
|
||
slot, error_string (slot, rc));
|
||
return 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, resultlen);
|
||
if ( !retbuf && (sw == SW_SUCCESS || (sw & 0xff00) == SW_MORE_DATA))
|
||
log_printhex (" dump: ", result, resultlen);
|
||
}
|
||
|
||
if (sw == SW_SUCCESS)
|
||
{
|
||
if (retbuf)
|
||
{
|
||
*retbuf = xtrymalloc (resultlen? resultlen : 1);
|
||
if (!*retbuf)
|
||
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)
|
||
return SW_HOST_OUT_OF_CORE;
|
||
assert (resultlen < bufsize);
|
||
memcpy (p, result, resultlen);
|
||
p += resultlen;
|
||
}
|
||
|
||
do
|
||
{
|
||
int len = (sw & 0x00ff);
|
||
|
||
log_debug ("apdu_send_simple(%d): %d more bytes available\n",
|
||
slot, len);
|
||
apdulen = 0;
|
||
apdu[apdulen++] = class;
|
||
apdu[apdulen++] = 0xC0;
|
||
apdu[apdulen++] = 0;
|
||
apdu[apdulen++] = 0;
|
||
apdu[apdulen++] = 64; /* that is 256 bytes for Le */
|
||
memset (apdu+apdulen, 0, sizeof (apdu) - apdulen);
|
||
rc = send_apdu (slot, apdu, apdulen, result, &resultlen);
|
||
if (rc || resultlen < 2)
|
||
{
|
||
log_error ("apdu_send_simple(%d) for get response failed: %s\n",
|
||
slot, error_string (slot, rc));
|
||
return 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, 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)
|
||
{
|
||
if (retbuf)
|
||
{
|
||
if (p - *retbuf + resultlen > bufsize)
|
||
{
|
||
bufsize += resultlen > 4096? resultlen: 4096;
|
||
tmp = xtryrealloc (*retbuf, bufsize);
|
||
if (!tmp)
|
||
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;
|
||
}
|
||
}
|
||
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. 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. 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 class, int ins, int p0, int p1,
|
||
int lc, const char *data, unsigned char **retbuf, size_t *retbuflen)
|
||
{
|
||
return apdu_send_le (slot, class, ins, p0, p1, lc, data, 256,
|
||
retbuf, retbuflen);
|
||
}
|
||
|
||
/* 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. 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 class, int ins, int p0, int p1,
|
||
int lc, const char *data)
|
||
{
|
||
return apdu_send_le (slot, class, ins, p0, p1, lc, data, -1, NULL, NULL);
|
||
}
|
||
|
||
|
||
|
||
|