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gnupg/scd/apdu.c
Werner Koch 9e6c5f9a61 * scdaemon.c: New options --print-atr and --reader-port
* apdu.c, apdu.h: New

* card.c, card-p15.c, card-dinsig.c: Allow build without OpenSC.
2003-04-29 19:08:35 +00:00

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/* apdu.c - ISO 7816 APDU functions and low level I/O
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>
#include "scdaemon.h"
#include "apdu.h"
#define HAVE_CTAPI 1
#define MAX_READER 4 /* Number of readers we support concurrently. */
#define CARD_CONNECT_TIMEOUT 30 /* Number of seconds to wait for
insertion of the card. */
/* A global table to keep track of active readers. */
static struct {
int used; /* True if slot is used. */
unsigned short port; /* port number0 = unused, 1 - dev/tty */
int status;
unsigned char atr[33];
size_t atrlen;
} reader_table[MAX_READER];
/* ct API function pointer. */
static char (*CT_init) (unsigned short ctn, unsigned short Pn);
static char (*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 (*CT_close) (unsigned short ctn);
/*
Helper
*/
/* Find an unused reader slot for PORT and put it into the reader
table. Return -1 on error or the index into the reader table. */
static int
new_reader_slot (int port)
{
int i, reader = -1;
if (port < 0 || port > 0xffff)
{
log_error ("new_reader_slot: invalid port %d requested\n", port);
return -1;
}
for (i=0; i < MAX_READER; i++)
{
if (reader_table[i].used && reader_table[i].port == port)
{
log_error ("new_reader_slot: requested port %d already in use\n",
reader);
return -1;
}
else if (!reader_table[i].used && reader == -1)
reader = i;
}
if (reader == -1)
{
log_error ("new_reader_slot: out of slots\n");
return -1;
}
reader_table[reader].used = 1;
reader_table[reader].port = port;
return reader;
}
static void
dump_reader_status (int reader)
{
log_info ("reader %d: %s\n", reader,
reader_table[reader].status == 1? "Processor ICC present" :
reader_table[reader].status == 0? "Memory ICC present" :
"ICC not present" );
if (reader_table[reader].status != -1)
{
log_info ("reader %d: ATR=", reader);
log_printhex ("", reader_table[reader].atr,
reader_table[reader].atrlen);
}
}
#ifdef HAVE_CTAPI
/*
ct API Interface
*/
static const char *
ct_error_string (int 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";
}
}
/* Wait for the card in READER and activate it. Return -1 on error or
0 on success. */
static int
ct_activate_card (int reader)
{
int rc, count;
for (count = 0; count < CARD_CONNECT_TIMEOUT; count++)
{
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 (reader, 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",
reader, ct_error_string (rc));
return -1;
}
if (buf[0] == 0x05)
{ /* 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 (reader, dad, sad, 5, cmd, &buflen, buf);
if (rc || buflen < 2 || buf[buflen-2] != 0x90)
{
log_error ("ct_activate_card(%d): activation failed: %s\n",
reader, ct_error_string (rc));
return -1;
}
/* Store the type and the ATR. */
if (buflen - 2 > DIM (reader_table[0].atr))
{
log_error ("ct_activate_card(%d): ATR too long\n", reader);
return -1;
}
reader_table[reader].status = buf[buflen - 1];
memcpy (reader_table[reader].atr, buf, buflen - 2);
reader_table[reader].atrlen = buflen - 2;
return 0;
}
sleep (1); /* FIXME: we should use a more reliable timer. */
}
log_info ("ct_activate_card(%d): timeout waiting for card\n", reader);
return -1;
}
/* 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 habe port numbers starting at 32769. */
static int
open_ct_reader (int port)
{
int rc, reader;
reader = new_reader_slot (port);
if (reader == -1)
return reader;
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;
return -1;
}
rc = ct_activate_card (reader);
if (rc)
{
reader_table[reader].used = 0;
return -1;
}
dump_reader_status (reader);
return reader;
}
#endif /*HAVE_CTAPI*/
#ifdef HAVE_PCSC
/*
PC/SC Interface
*/
#endif /*HAVE_PCSC*/
/*
Driver Access
*/
/* Open the reader and return an internal slot number or -1 on
error. */
int
apdu_open_reader (int port)
{
static int ct_api_loaded;
if (!ct_api_loaded)
{
void *handle;
handle = dlopen ("libtowitoko.so", 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 driver\n");
dlclose (handle);
return -1;
}
ct_api_loaded = 1;
}
return open_ct_reader (port);
}