mirror of
git://git.gnupg.org/gnupg.git
synced 2024-11-10 21:38:50 +01:00
5db236f4e7
(AUTOMAKE_OPTIONS): New. * configure.ac: Check whether vasprintf needs a replacement. * app-openpgp.c (parse_login_data): New. (app_select_openpgp): Call it. (do_setattr): Reparse it after change. * Makefile.am: Add ksutil.h.
1843 lines
50 KiB
C
1843 lines
50 KiB
C
/* app-openpgp.c - The OpenPGP card application.
|
|
* Copyright (C) 2003, 2004 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
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <time.h>
|
|
|
|
#if GNUPG_MAJOR_VERSION == 1
|
|
/* This is used with GnuPG version < 1.9. The code has been source
|
|
copied from the current GnuPG >= 1.9 and is maintained over
|
|
there. */
|
|
#include "options.h"
|
|
#include "errors.h"
|
|
#include "memory.h"
|
|
#include "util.h"
|
|
#include "cardglue.h"
|
|
#else /* GNUPG_MAJOR_VERSION != 1 */
|
|
#include "scdaemon.h"
|
|
#endif /* GNUPG_MAJOR_VERSION != 1 */
|
|
|
|
#include "i18n.h"
|
|
#include "iso7816.h"
|
|
#include "app-common.h"
|
|
#include "tlv.h"
|
|
|
|
|
|
static struct {
|
|
int tag;
|
|
int constructed;
|
|
int get_from; /* Constructed DO with this DO or 0 for direct access. */
|
|
int binary;
|
|
int dont_cache;
|
|
int flush_on_error;
|
|
int get_immediate_in_v11; /* Enable a hack to bypass the cache of
|
|
this data object if it is used in 1.1
|
|
and later versions of the card. This
|
|
does not work with composite DO and is
|
|
currently only useful for the CHV
|
|
status bytes. */
|
|
char *desc;
|
|
} data_objects[] = {
|
|
{ 0x005E, 0, 0, 1, 0, 0, 0, "Login Data" },
|
|
{ 0x5F50, 0, 0, 0, 0, 0, 0, "URL" },
|
|
{ 0x0065, 1, 0, 1, 0, 0, 0, "Cardholder Related Data"},
|
|
{ 0x005B, 0, 0x65, 0, 0, 0, 0, "Name" },
|
|
{ 0x5F2D, 0, 0x65, 0, 0, 0, 0, "Language preferences" },
|
|
{ 0x5F35, 0, 0x65, 0, 0, 0, 0, "Sex" },
|
|
{ 0x006E, 1, 0, 1, 0, 0, 0, "Application Related Data" },
|
|
{ 0x004F, 0, 0x6E, 1, 0, 0, 0, "AID" },
|
|
{ 0x0073, 1, 0, 1, 0, 0, 0, "Discretionary Data Objects" },
|
|
{ 0x0047, 0, 0x6E, 1, 1, 0, 0, "Card Capabilities" },
|
|
{ 0x00C0, 0, 0x6E, 1, 1, 0, 0, "Extended Card Capabilities" },
|
|
{ 0x00C1, 0, 0x6E, 1, 1, 0, 0, "Algorithm Attributes Signature" },
|
|
{ 0x00C2, 0, 0x6E, 1, 1, 0, 0, "Algorithm Attributes Decryption" },
|
|
{ 0x00C3, 0, 0x6E, 1, 1, 0, 0, "Algorithm Attributes Authentication" },
|
|
{ 0x00C4, 0, 0x6E, 1, 0, 1, 1, "CHV Status Bytes" },
|
|
{ 0x00C5, 0, 0x6E, 1, 0, 0, 0, "Fingerprints" },
|
|
{ 0x00C6, 0, 0x6E, 1, 0, 0, 0, "CA Fingerprints" },
|
|
{ 0x007A, 1, 0, 1, 0, 0, 0, "Security Support Template" },
|
|
{ 0x0093, 0, 0x7A, 1, 1, 0, 0, "Digital Signature Counter" },
|
|
{ 0 }
|
|
};
|
|
|
|
|
|
struct cache_s {
|
|
struct cache_s *next;
|
|
int tag;
|
|
size_t length;
|
|
unsigned char data[1];
|
|
};
|
|
|
|
struct app_local_s {
|
|
struct cache_s *cache;
|
|
struct
|
|
{
|
|
unsigned int get_challenge:1;
|
|
unsigned int key_import:1;
|
|
unsigned int change_force_chv:1;
|
|
unsigned int private_dos:1;
|
|
} extcap;
|
|
struct
|
|
{
|
|
unsigned int no_sync:1; /* Do not sync CHV1 and CHV2 */
|
|
unsigned int def_chv2:1; /* Use 123456 for CHV2. */
|
|
} flags;
|
|
};
|
|
|
|
|
|
static unsigned long convert_sig_counter_value (const unsigned char *value,
|
|
size_t valuelen);
|
|
static unsigned long get_sig_counter (APP app);
|
|
|
|
/* Deconstructor. */
|
|
static void
|
|
do_deinit (app_t app)
|
|
{
|
|
if (app && app->app_local)
|
|
{
|
|
struct cache_s *c, *c2;
|
|
|
|
for (c = app->app_local->cache; c; c = c2)
|
|
{
|
|
c2 = c->next;
|
|
xfree (c);
|
|
}
|
|
xfree (app->app_local);
|
|
app->app_local = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
/* Wrapper around iso7816_get_data which first tries to get the data
|
|
from the cache. */
|
|
static gpg_error_t
|
|
get_cached_data (app_t app, int tag,
|
|
unsigned char **result, size_t *resultlen)
|
|
{
|
|
gpg_error_t err;
|
|
int i;
|
|
unsigned char *p;
|
|
size_t len;
|
|
struct cache_s *c;
|
|
|
|
*result = NULL;
|
|
*resultlen = 0;
|
|
|
|
for (c=app->app_local->cache; c; c = c->next)
|
|
if (c->tag == tag)
|
|
{
|
|
if(c->length)
|
|
{
|
|
p = xtrymalloc (c->length);
|
|
if (!p)
|
|
return gpg_error (gpg_err_code_from_errno (errno));
|
|
memcpy (p, c->data, c->length);
|
|
*result = p;
|
|
}
|
|
|
|
*resultlen = c->length;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
err = iso7816_get_data (app->slot, tag, &p, &len);
|
|
if (err)
|
|
return err;
|
|
*result = p;
|
|
*resultlen = len;
|
|
|
|
/* Check whether we should cache this object. */
|
|
for (i=0; data_objects[i].tag; i++)
|
|
if (data_objects[i].tag == tag)
|
|
{
|
|
if (data_objects[i].dont_cache)
|
|
return 0;
|
|
break;
|
|
}
|
|
|
|
/* No, cache it. */
|
|
|
|
for (c=app->app_local->cache; c; c = c->next)
|
|
assert (c->tag != tag);
|
|
|
|
c = xtrymalloc (sizeof *c + len);
|
|
if (c)
|
|
{
|
|
memcpy (c->data, p, len);
|
|
c->length = len;
|
|
c->tag = tag;
|
|
c->next = app->app_local->cache;
|
|
app->app_local->cache = c;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Remove DO at TAG from the cache. */
|
|
static void
|
|
flush_cache_item (app_t app, int tag)
|
|
{
|
|
struct cache_s *c, *cprev;
|
|
int i;
|
|
|
|
if (!app->app_local)
|
|
return;
|
|
|
|
for (c=app->app_local->cache, cprev=NULL; c ; cprev=c, c = c->next)
|
|
if (c->tag == tag)
|
|
{
|
|
if (cprev)
|
|
cprev->next = c->next;
|
|
else
|
|
app->app_local->cache = c->next;
|
|
xfree (c);
|
|
|
|
for (c=app->app_local->cache; c ; c = c->next)
|
|
{
|
|
assert (c->tag != tag); /* Oops: duplicated entry. */
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Try again if we have an outer tag. */
|
|
for (i=0; data_objects[i].tag; i++)
|
|
if (data_objects[i].tag == tag && data_objects[i].get_from
|
|
&& data_objects[i].get_from != tag)
|
|
flush_cache_item (app, data_objects[i].get_from);
|
|
}
|
|
|
|
/* Flush all entries from the cache which might be out of sync after
|
|
an error. */
|
|
static void
|
|
flush_cache_after_error (app_t app)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; data_objects[i].tag; i++)
|
|
if (data_objects[i].flush_on_error)
|
|
flush_cache_item (app, data_objects[i].tag);
|
|
}
|
|
|
|
|
|
/* Flush the entire cache. */
|
|
static void
|
|
flush_cache (app_t app)
|
|
{
|
|
if (app && app->app_local)
|
|
{
|
|
struct cache_s *c, *c2;
|
|
|
|
for (c = app->app_local->cache; c; c = c2)
|
|
{
|
|
c2 = c->next;
|
|
xfree (c);
|
|
}
|
|
app->app_local->cache = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
/* Get the DO identified by TAG from the card in SLOT and return a
|
|
buffer with its content in RESULT and NBYTES. The return value is
|
|
NULL if not found or a pointer which must be used to release the
|
|
buffer holding value. */
|
|
static void *
|
|
get_one_do (app_t app, int tag, unsigned char **result, size_t *nbytes)
|
|
{
|
|
int rc, i;
|
|
unsigned char *buffer;
|
|
size_t buflen;
|
|
unsigned char *value;
|
|
size_t valuelen;
|
|
|
|
*result = NULL;
|
|
*nbytes = 0;
|
|
for (i=0; data_objects[i].tag && data_objects[i].tag != tag; i++)
|
|
;
|
|
|
|
if (app->card_version > 0x0100 && data_objects[i].get_immediate_in_v11)
|
|
{
|
|
if( iso7816_get_data (app->slot, tag, &buffer, &buflen))
|
|
return NULL;
|
|
*result = buffer;
|
|
*nbytes = buflen;
|
|
return buffer;
|
|
}
|
|
|
|
value = NULL;
|
|
rc = -1;
|
|
if (data_objects[i].tag && data_objects[i].get_from)
|
|
{
|
|
rc = get_cached_data (app, data_objects[i].get_from,
|
|
&buffer, &buflen);
|
|
if (!rc)
|
|
{
|
|
const unsigned char *s;
|
|
|
|
s = find_tlv (buffer, buflen, tag, &valuelen);
|
|
if (!s)
|
|
value = NULL; /* not found */
|
|
else if (valuelen > buflen - (s - buffer))
|
|
{
|
|
log_error ("warning: constructed DO too short\n");
|
|
value = NULL;
|
|
xfree (buffer); buffer = NULL;
|
|
}
|
|
else
|
|
value = buffer + (s - buffer);
|
|
}
|
|
}
|
|
|
|
if (!value) /* Not in a constructed DO, try simple. */
|
|
{
|
|
rc = get_cached_data (app, tag, &buffer, &buflen);
|
|
if (!rc)
|
|
{
|
|
value = buffer;
|
|
valuelen = buflen;
|
|
}
|
|
}
|
|
|
|
if (!rc)
|
|
{
|
|
*nbytes = valuelen;
|
|
*result = value;
|
|
return buffer;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static void
|
|
dump_all_do (int slot)
|
|
{
|
|
int rc, i, j;
|
|
unsigned char *buffer;
|
|
size_t buflen;
|
|
|
|
for (i=0; data_objects[i].tag; i++)
|
|
{
|
|
if (data_objects[i].get_from)
|
|
continue;
|
|
|
|
rc = iso7816_get_data (slot, data_objects[i].tag, &buffer, &buflen);
|
|
if (gpg_err_code (rc) == GPG_ERR_NO_OBJ)
|
|
;
|
|
else if (rc)
|
|
log_info ("DO `%s' not available: %s\n",
|
|
data_objects[i].desc, gpg_strerror (rc));
|
|
else
|
|
{
|
|
if (data_objects[i].binary)
|
|
{
|
|
log_info ("DO `%s': ", data_objects[i].desc);
|
|
log_printhex ("", buffer, buflen);
|
|
}
|
|
else
|
|
log_info ("DO `%s': `%.*s'\n",
|
|
data_objects[i].desc,
|
|
(int)buflen, buffer); /* FIXME: sanitize */
|
|
|
|
if (data_objects[i].constructed)
|
|
{
|
|
for (j=0; data_objects[j].tag; j++)
|
|
{
|
|
const unsigned char *value;
|
|
size_t valuelen;
|
|
|
|
if (j==i || data_objects[i].tag != data_objects[j].get_from)
|
|
continue;
|
|
value = find_tlv (buffer, buflen,
|
|
data_objects[j].tag, &valuelen);
|
|
if (!value)
|
|
; /* not found */
|
|
else if (valuelen > buflen - (value - buffer))
|
|
log_error ("warning: constructed DO too short\n");
|
|
else
|
|
{
|
|
if (data_objects[j].binary)
|
|
{
|
|
log_info ("DO `%s': ", data_objects[j].desc);
|
|
log_printhex ("", value, valuelen);
|
|
}
|
|
else
|
|
log_info ("DO `%s': `%.*s'\n",
|
|
data_objects[j].desc,
|
|
(int)valuelen, value); /* FIXME: sanitize */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
xfree (buffer); buffer = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
/* Count the number of bits, assuming the A represents an unsigned big
|
|
integer of length LEN bytes. */
|
|
static unsigned int
|
|
count_bits (const unsigned char *a, size_t len)
|
|
{
|
|
unsigned int n = len * 8;
|
|
int i;
|
|
|
|
for (; len && !*a; len--, a++, n -=8)
|
|
;
|
|
if (len)
|
|
{
|
|
for (i=7; i && !(*a & (1<<i)); i--)
|
|
n--;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
/* GnuPG makes special use of the login-data DO, this fucntion parses
|
|
the login data to store the flags for later use. It may be called
|
|
at any time and should be called after changing the login-data DO.
|
|
|
|
Everything up to a LF is considered a mailbox or account name. If
|
|
the first LF is follewed by DC4 (0x14) control sequence are
|
|
expected up to the next LF. Control sequences are separated by FS
|
|
(0x28) and consist of key=value pairs. There is one key defined:
|
|
|
|
F=<flags>
|
|
|
|
Were FLAGS is a plain hexadecimal number representing flag values.
|
|
The lsb is here the rightmost bit. Defined flags bits are:
|
|
|
|
Bit 0 = CHV1 and CHV2 are not syncronized
|
|
Bit 1 = CHV2 has been been set to the default PIN of "123456"
|
|
(this implies that bit 0 is also set).
|
|
|
|
*/
|
|
static void
|
|
parse_login_data (app_t app)
|
|
{
|
|
unsigned char *buffer, *p;
|
|
size_t buflen, len;
|
|
void *relptr;
|
|
|
|
/* Set defaults. */
|
|
app->app_local->flags.no_sync = 0;
|
|
app->app_local->flags.def_chv2 = 0;
|
|
|
|
/* Read the DO. */
|
|
relptr = get_one_do (app, 0x005E, &buffer, &buflen);
|
|
if (!relptr)
|
|
return; /* Ooops. */
|
|
for (; buflen; buflen--, buffer++)
|
|
if (*buffer == '\n')
|
|
break;
|
|
if (buflen < 2 || buffer[1] != '\x14')
|
|
return; /* No control sequences. */
|
|
buflen--;
|
|
buffer++;
|
|
do
|
|
{
|
|
buflen--;
|
|
buffer++;
|
|
if (buflen > 1 && *buffer == 'F' && buffer[1] == '=')
|
|
{
|
|
/* Flags control sequence found. */
|
|
int lastdig = 0;
|
|
|
|
/* For now we are only interested in the last digit, so skip
|
|
any leading digits but bail out on invalid characters. */
|
|
for (p=buffer+2, len = buflen-2; len && hexdigitp (p); p++, len--)
|
|
lastdig = xtoi_1 (p);
|
|
if (len && !(*p == '\n' || *p == '\x18'))
|
|
goto next; /* Invalid characters in field. */
|
|
app->app_local->flags.no_sync = !!(lastdig & 1);
|
|
app->app_local->flags.def_chv2 = (lastdig & 3) == 3;
|
|
}
|
|
next:
|
|
for (; buflen && *buffer != '\x18'; buflen--, buffer++)
|
|
if (*buffer == '\n')
|
|
buflen = 1;
|
|
}
|
|
while (buflen);
|
|
|
|
xfree (relptr);
|
|
}
|
|
|
|
/* Note, that FPR must be at least 20 bytes. */
|
|
static int
|
|
store_fpr (int slot, int keynumber, u32 timestamp,
|
|
const unsigned char *m, size_t mlen,
|
|
const unsigned char *e, size_t elen,
|
|
unsigned char *fpr, unsigned int card_version)
|
|
{
|
|
unsigned int n, nbits;
|
|
unsigned char *buffer, *p;
|
|
int rc;
|
|
|
|
for (; mlen && !*m; mlen--, m++) /* strip leading zeroes */
|
|
;
|
|
for (; elen && !*e; elen--, e++) /* strip leading zeroes */
|
|
;
|
|
|
|
n = 6 + 2 + mlen + 2 + elen;
|
|
p = buffer = xtrymalloc (3 + n);
|
|
if (!buffer)
|
|
return gpg_error (gpg_err_code_from_errno (errno));
|
|
|
|
*p++ = 0x99; /* ctb */
|
|
*p++ = n >> 8; /* 2 byte length header */
|
|
*p++ = n;
|
|
*p++ = 4; /* key packet version */
|
|
*p++ = timestamp >> 24;
|
|
*p++ = timestamp >> 16;
|
|
*p++ = timestamp >> 8;
|
|
*p++ = timestamp;
|
|
*p++ = 1; /* RSA */
|
|
nbits = count_bits (m, mlen);
|
|
*p++ = nbits >> 8;
|
|
*p++ = nbits;
|
|
memcpy (p, m, mlen); p += mlen;
|
|
nbits = count_bits (e, elen);
|
|
*p++ = nbits >> 8;
|
|
*p++ = nbits;
|
|
memcpy (p, e, elen); p += elen;
|
|
|
|
gcry_md_hash_buffer (GCRY_MD_SHA1, fpr, buffer, n+3);
|
|
|
|
xfree (buffer);
|
|
|
|
rc = iso7816_put_data (slot, (card_version > 0x0007? 0xC7 : 0xC6)
|
|
+ keynumber, fpr, 20);
|
|
if (rc)
|
|
log_error (_("failed to store the fingerprint: %s\n"),gpg_strerror (rc));
|
|
|
|
if (!rc && card_version > 0x0100)
|
|
{
|
|
unsigned char buf[4];
|
|
|
|
buf[0] = timestamp >> 24;
|
|
buf[1] = timestamp >> 16;
|
|
buf[2] = timestamp >> 8;
|
|
buf[3] = timestamp;
|
|
|
|
rc = iso7816_put_data (slot, 0xCE + keynumber, buf, 4);
|
|
if (rc)
|
|
log_error (_("failed to store the creation date: %s\n"),
|
|
gpg_strerror (rc));
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
static void
|
|
send_fpr_if_not_null (ctrl_t ctrl, const char *keyword,
|
|
int number, const unsigned char *fpr)
|
|
{
|
|
int i;
|
|
char buf[41];
|
|
char numbuf[25];
|
|
|
|
for (i=0; i < 20 && !fpr[i]; i++)
|
|
;
|
|
if (i==20)
|
|
return; /* All zero. */
|
|
for (i=0; i< 20; i++)
|
|
sprintf (buf+2*i, "%02X", fpr[i]);
|
|
if (number == -1)
|
|
*numbuf = 0; /* Don't print the key number */
|
|
else
|
|
sprintf (numbuf, "%d", number);
|
|
send_status_info (ctrl, keyword,
|
|
numbuf, (size_t)strlen(numbuf),
|
|
buf, (size_t)strlen (buf), NULL, 0);
|
|
}
|
|
|
|
static void
|
|
send_key_data (ctrl_t ctrl, const char *name,
|
|
const unsigned char *a, size_t alen)
|
|
{
|
|
char *p, *buf = xmalloc (alen*2+1);
|
|
|
|
for (p=buf; alen; a++, alen--, p += 2)
|
|
sprintf (p, "%02X", *a);
|
|
|
|
send_status_info (ctrl, "KEY-DATA",
|
|
name, (size_t)strlen(name),
|
|
buf, (size_t)strlen (buf),
|
|
NULL, 0);
|
|
xfree (buf);
|
|
}
|
|
|
|
/* Implement the GETATTR command. This is similar to the LEARN
|
|
command but returns just one value via the status interface. */
|
|
static int
|
|
do_getattr (app_t app, ctrl_t ctrl, const char *name)
|
|
{
|
|
static struct {
|
|
const char *name;
|
|
int tag;
|
|
int special;
|
|
} table[] = {
|
|
{ "DISP-NAME", 0x005B },
|
|
{ "LOGIN-DATA", 0x005E },
|
|
{ "DISP-LANG", 0x5F2D },
|
|
{ "DISP-SEX", 0x5F35 },
|
|
{ "PUBKEY-URL", 0x5F50 },
|
|
{ "KEY-FPR", 0x00C5, 3 },
|
|
{ "CA-FPR", 0x00C6, 3 },
|
|
{ "CHV-STATUS", 0x00C4, 1 },
|
|
{ "SIG-COUNTER", 0x0093, 2 },
|
|
{ "SERIALNO", 0x004F, -1 },
|
|
{ "AID", 0x004F },
|
|
{ "EXTCAP", 0x0000, -2 },
|
|
{ NULL, 0 }
|
|
};
|
|
int idx, i;
|
|
void *relptr;
|
|
unsigned char *value;
|
|
size_t valuelen;
|
|
|
|
for (idx=0; table[idx].name && strcmp (table[idx].name, name); idx++)
|
|
;
|
|
if (!table[idx].name)
|
|
return gpg_error (GPG_ERR_INV_NAME);
|
|
|
|
if (table[idx].special == -1)
|
|
{
|
|
/* The serial number is very special. We could have used the
|
|
AID DO to retrieve it, but we have it already in the app
|
|
context and the stamp argument is required anyway which we
|
|
can't by other means. The AID DO is available anyway but not
|
|
hex formatted. */
|
|
char *serial;
|
|
time_t stamp;
|
|
char tmp[50];
|
|
|
|
if (!app_get_serial_and_stamp (app, &serial, &stamp))
|
|
{
|
|
sprintf (tmp, "%lu", (unsigned long)stamp);
|
|
send_status_info (ctrl, "SERIALNO",
|
|
serial, strlen (serial),
|
|
tmp, strlen (tmp),
|
|
NULL, 0);
|
|
xfree (serial);
|
|
}
|
|
return 0;
|
|
}
|
|
if (table[idx].special == -2)
|
|
{
|
|
char tmp[50];
|
|
|
|
sprintf (tmp, "gc=%d ki=%d fc=%d pd=%d",
|
|
app->app_local->extcap.get_challenge,
|
|
app->app_local->extcap.key_import,
|
|
app->app_local->extcap.change_force_chv,
|
|
app->app_local->extcap.private_dos);
|
|
send_status_info (ctrl, table[idx].name, tmp, strlen (tmp), NULL, 0);
|
|
return 0;
|
|
}
|
|
|
|
relptr = get_one_do (app, table[idx].tag, &value, &valuelen);
|
|
if (relptr)
|
|
{
|
|
if (table[idx].special == 1)
|
|
{
|
|
char numbuf[7*23];
|
|
|
|
for (i=0,*numbuf=0; i < valuelen && i < 7; i++)
|
|
sprintf (numbuf+strlen (numbuf), " %d", value[i]);
|
|
send_status_info (ctrl, table[idx].name,
|
|
numbuf, strlen (numbuf), NULL, 0);
|
|
}
|
|
else if (table[idx].special == 2)
|
|
{
|
|
char numbuf[50];
|
|
|
|
sprintf (numbuf, "%lu", convert_sig_counter_value (value, valuelen));
|
|
send_status_info (ctrl, table[idx].name,
|
|
numbuf, strlen (numbuf), NULL, 0);
|
|
}
|
|
else if (table[idx].special == 3)
|
|
{
|
|
if (valuelen >= 60)
|
|
for (i=0; i < 3; i++)
|
|
send_fpr_if_not_null (ctrl, table[idx].name, i+1, value+i*20);
|
|
}
|
|
else
|
|
send_status_info (ctrl, table[idx].name, value, valuelen, NULL, 0);
|
|
|
|
xfree (relptr);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
do_learn_status (app_t app, ctrl_t ctrl)
|
|
{
|
|
do_getattr (app, ctrl, "EXTCAP");
|
|
do_getattr (app, ctrl, "DISP-NAME");
|
|
do_getattr (app, ctrl, "DISP-LANG");
|
|
do_getattr (app, ctrl, "DISP-SEX");
|
|
do_getattr (app, ctrl, "PUBKEY-URL");
|
|
do_getattr (app, ctrl, "LOGIN-DATA");
|
|
do_getattr (app, ctrl, "KEY-FPR");
|
|
do_getattr (app, ctrl, "CA-FPR");
|
|
do_getattr (app, ctrl, "CHV-STATUS");
|
|
do_getattr (app, ctrl, "SIG-COUNTER");
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Verify CHV2 if required. Depending on the configuration of the
|
|
card CHV1 will also be verified. */
|
|
static int
|
|
verify_chv2 (app_t app,
|
|
int (*pincb)(void*, const char *, char **),
|
|
void *pincb_arg)
|
|
{
|
|
int rc = 0;
|
|
|
|
if (!app->did_chv2)
|
|
{
|
|
char *pinvalue;
|
|
|
|
rc = pincb (pincb_arg, "PIN", &pinvalue);
|
|
if (rc)
|
|
{
|
|
log_info (_("PIN callback returned error: %s\n"), gpg_strerror (rc));
|
|
return rc;
|
|
}
|
|
|
|
if (strlen (pinvalue) < 6)
|
|
{
|
|
log_error (_("PIN for CHV%d is too short;"
|
|
" minimum length is %d\n"), 2, 6);
|
|
xfree (pinvalue);
|
|
return gpg_error (GPG_ERR_BAD_PIN);
|
|
}
|
|
|
|
rc = iso7816_verify (app->slot, 0x82, pinvalue, strlen (pinvalue));
|
|
if (rc)
|
|
{
|
|
log_error (_("verify CHV%d failed: %s\n"), 2, gpg_strerror (rc));
|
|
xfree (pinvalue);
|
|
flush_cache_after_error (app);
|
|
return rc;
|
|
}
|
|
app->did_chv2 = 1;
|
|
|
|
if (!app->did_chv1 && !app->force_chv1)
|
|
{
|
|
rc = iso7816_verify (app->slot, 0x81, pinvalue, strlen (pinvalue));
|
|
if (gpg_err_code (rc) == GPG_ERR_BAD_PIN)
|
|
rc = gpg_error (GPG_ERR_PIN_NOT_SYNCED);
|
|
if (rc)
|
|
{
|
|
log_error (_("verify CHV%d failed: %s\n"), 1, gpg_strerror (rc));
|
|
xfree (pinvalue);
|
|
flush_cache_after_error (app);
|
|
return rc;
|
|
}
|
|
app->did_chv1 = 1;
|
|
}
|
|
xfree (pinvalue);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/* Verify CHV3 if required. */
|
|
static int
|
|
verify_chv3 (app_t app,
|
|
int (*pincb)(void*, const char *, char **),
|
|
void *pincb_arg)
|
|
{
|
|
int rc = 0;
|
|
|
|
#if GNUPG_MAJOR_VERSION != 1
|
|
if (!opt.allow_admin)
|
|
{
|
|
log_info (_("access to admin commands is not configured\n"));
|
|
return gpg_error (GPG_ERR_EACCES);
|
|
}
|
|
#endif
|
|
|
|
if (!app->did_chv3)
|
|
{
|
|
char *pinvalue;
|
|
void *relptr;
|
|
unsigned char *value;
|
|
size_t valuelen;
|
|
int reread_chv_status;
|
|
|
|
|
|
relptr = get_one_do (app, 0x00C4, &value, &valuelen);
|
|
if (!relptr || valuelen < 7)
|
|
{
|
|
log_error (_("error retrieving CHV status from card\n"));
|
|
xfree (relptr);
|
|
return gpg_error (GPG_ERR_CARD);
|
|
}
|
|
if (value[6] == 0)
|
|
{
|
|
log_info (_("card is permanently locked!\n"));
|
|
xfree (relptr);
|
|
return gpg_error (GPG_ERR_BAD_PIN);
|
|
}
|
|
|
|
reread_chv_status = (value[6] < 3);
|
|
|
|
log_info(_("%d Admin PIN attempts remaining before card"
|
|
" is permanently locked\n"), value[6]);
|
|
xfree (relptr);
|
|
|
|
rc = pincb (pincb_arg, _("Admin PIN"), &pinvalue);
|
|
if (rc)
|
|
{
|
|
log_info (_("PIN callback returned error: %s\n"), gpg_strerror (rc));
|
|
return rc;
|
|
}
|
|
|
|
if (strlen (pinvalue) < 6)
|
|
{
|
|
log_error (_("prassphrase (CHV%d) is too short;"
|
|
" minimum length is %d\n"), 3, 6);
|
|
xfree (pinvalue);
|
|
return gpg_error (GPG_ERR_BAD_PIN);
|
|
}
|
|
|
|
rc = iso7816_verify (app->slot, 0x83, pinvalue, strlen (pinvalue));
|
|
xfree (pinvalue);
|
|
if (rc)
|
|
{
|
|
log_error (_("verify CHV%d failed: %s\n"), 3, gpg_strerror (rc));
|
|
flush_cache_after_error (app);
|
|
return rc;
|
|
}
|
|
app->did_chv3 = 1;
|
|
/* If the PIN has been entered wrongly before, we need to flush
|
|
the cached value so that the next read correctly reflects the
|
|
resetted retry counter. Note that version 1.1 of the specs
|
|
allow direct reading of that DO, so that we could actually
|
|
flush it in all cases. */
|
|
if (reread_chv_status)
|
|
flush_cache_item (app, 0x00C4);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
|
|
/* Handle the SETATTR operation. All arguments are already basically
|
|
checked. */
|
|
static int
|
|
do_setattr (app_t app, const char *name,
|
|
int (*pincb)(void*, const char *, char **),
|
|
void *pincb_arg,
|
|
const unsigned char *value, size_t valuelen)
|
|
{
|
|
gpg_error_t rc;
|
|
int idx;
|
|
static struct {
|
|
const char *name;
|
|
int tag;
|
|
int special;
|
|
} table[] = {
|
|
{ "DISP-NAME", 0x005B },
|
|
{ "LOGIN-DATA", 0x005E, 2 },
|
|
{ "DISP-LANG", 0x5F2D },
|
|
{ "DISP-SEX", 0x5F35 },
|
|
{ "PUBKEY-URL", 0x5F50 },
|
|
{ "CHV-STATUS-1", 0x00C4, 1 },
|
|
{ "CA-FPR-1", 0x00CA },
|
|
{ "CA-FPR-2", 0x00CB },
|
|
{ "CA-FPR-3", 0x00CC },
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
|
|
for (idx=0; table[idx].name && strcmp (table[idx].name, name); idx++)
|
|
;
|
|
if (!table[idx].name)
|
|
return gpg_error (GPG_ERR_INV_NAME);
|
|
|
|
rc = verify_chv3 (app, pincb, pincb_arg);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* Flush the cache before writing it, so that the next get operation
|
|
will reread the data from the card and thus get synced in case of
|
|
errors (e.g. data truncated by the card). */
|
|
flush_cache_item (app, table[idx].tag);
|
|
rc = iso7816_put_data (app->slot, table[idx].tag, value, valuelen);
|
|
if (rc)
|
|
log_error ("failed to set `%s': %s\n", table[idx].name, gpg_strerror (rc));
|
|
|
|
if (table[idx].special == 1)
|
|
app->force_chv1 = (valuelen && *value == 0);
|
|
else if (table[idx].special == 2)
|
|
parse_login_data (app);
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
/* Handle the PASSWD command. */
|
|
static int
|
|
do_change_pin (app_t app, ctrl_t ctrl, const char *chvnostr, int reset_mode,
|
|
int (*pincb)(void*, const char *, char **),
|
|
void *pincb_arg)
|
|
{
|
|
int rc = 0;
|
|
int chvno = atoi (chvnostr);
|
|
char *pinvalue;
|
|
|
|
if (reset_mode && chvno == 3)
|
|
{
|
|
rc = gpg_error (GPG_ERR_INV_ID);
|
|
goto leave;
|
|
}
|
|
else if (reset_mode || chvno == 3)
|
|
{
|
|
/* we always require that the PIN is entered. */
|
|
app->did_chv3 = 0;
|
|
rc = verify_chv3 (app, pincb, pincb_arg);
|
|
if (rc)
|
|
goto leave;
|
|
}
|
|
else if (chvno == 1 || chvno == 2)
|
|
{
|
|
/* CHV1 and CVH2 should always have the same value, thus we
|
|
enforce it here. */
|
|
int save_force = app->force_chv1;
|
|
|
|
app->force_chv1 = 0;
|
|
app->did_chv1 = 0;
|
|
app->did_chv2 = 0;
|
|
rc = verify_chv2 (app, pincb, pincb_arg);
|
|
app->force_chv1 = save_force;
|
|
if (rc)
|
|
goto leave;
|
|
}
|
|
else
|
|
{
|
|
rc = gpg_error (GPG_ERR_INV_ID);
|
|
goto leave;
|
|
}
|
|
|
|
if (chvno == 3)
|
|
app->did_chv3 = 0;
|
|
else
|
|
app->did_chv1 = app->did_chv2 = 0;
|
|
|
|
rc = pincb (pincb_arg, chvno == 3? "New Admin PIN" : "New PIN", &pinvalue);
|
|
if (rc)
|
|
{
|
|
log_error ("error getting new PIN: %s\n", gpg_strerror (rc));
|
|
goto leave;
|
|
}
|
|
|
|
if (reset_mode)
|
|
{
|
|
rc = iso7816_reset_retry_counter (app->slot, 0x81,
|
|
pinvalue, strlen (pinvalue));
|
|
if (!rc)
|
|
rc = iso7816_reset_retry_counter (app->slot, 0x82,
|
|
pinvalue, strlen (pinvalue));
|
|
}
|
|
else
|
|
{
|
|
if (chvno == 1 || chvno == 2)
|
|
{
|
|
rc = iso7816_change_reference_data (app->slot, 0x81, NULL, 0,
|
|
pinvalue, strlen (pinvalue));
|
|
if (!rc)
|
|
rc = iso7816_change_reference_data (app->slot, 0x82, NULL, 0,
|
|
pinvalue, strlen (pinvalue));
|
|
}
|
|
else
|
|
rc = iso7816_change_reference_data (app->slot, 0x80 + chvno, NULL, 0,
|
|
pinvalue, strlen (pinvalue));
|
|
}
|
|
xfree (pinvalue);
|
|
if (rc)
|
|
flush_cache_after_error (app);
|
|
|
|
leave:
|
|
return rc;
|
|
}
|
|
|
|
|
|
|
|
/* Handle the GENKEY command. */
|
|
static int
|
|
do_genkey (app_t app, ctrl_t ctrl, const char *keynostr, unsigned int flags,
|
|
int (*pincb)(void*, const char *, char **),
|
|
void *pincb_arg)
|
|
{
|
|
int rc;
|
|
int i;
|
|
char numbuf[30];
|
|
unsigned char fprbuf[20];
|
|
const unsigned char *fpr;
|
|
const unsigned char *keydata, *m, *e;
|
|
unsigned char *buffer;
|
|
size_t buflen, keydatalen, n, mlen, elen;
|
|
time_t created_at;
|
|
int keyno = atoi (keynostr);
|
|
int force = (flags & 1);
|
|
time_t start_at;
|
|
|
|
if (keyno < 1 || keyno > 3)
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
keyno--;
|
|
|
|
/* We flush the cache to increase the traffic before a key
|
|
generation. This _might_ help a card to gather more entropy. */
|
|
flush_cache (app);
|
|
|
|
rc = iso7816_get_data (app->slot, 0x006E, &buffer, &buflen);
|
|
if (rc)
|
|
{
|
|
log_error ("error reading application data\n");
|
|
return gpg_error (GPG_ERR_GENERAL);
|
|
}
|
|
fpr = find_tlv (buffer, buflen, 0x00C5, &n);
|
|
if (!fpr || n != 60)
|
|
{
|
|
rc = gpg_error (GPG_ERR_GENERAL);
|
|
log_error ("error reading fingerprint DO\n");
|
|
goto leave;
|
|
}
|
|
fpr += 20*keyno;
|
|
for (i=0; i < 20 && !fpr[i]; i++)
|
|
;
|
|
if (i!=20 && !force)
|
|
{
|
|
rc = gpg_error (GPG_ERR_EEXIST);
|
|
log_error ("key already exists\n");
|
|
goto leave;
|
|
}
|
|
else if (i!=20)
|
|
log_info ("existing key will be replaced\n");
|
|
else
|
|
log_info ("generating new key\n");
|
|
|
|
|
|
rc = verify_chv3 (app, pincb, pincb_arg);
|
|
if (rc)
|
|
goto leave;
|
|
|
|
xfree (buffer); buffer = NULL;
|
|
|
|
#if 1
|
|
log_info ("please wait while key is being generated ...\n");
|
|
start_at = time (NULL);
|
|
rc = iso7816_generate_keypair
|
|
#else
|
|
#warning key generation temporary replaced by reading an existing key.
|
|
rc = iso7816_read_public_key
|
|
#endif
|
|
(app->slot,
|
|
keyno == 0? "\xB6" :
|
|
keyno == 1? "\xB8" : "\xA4",
|
|
2,
|
|
&buffer, &buflen);
|
|
if (rc)
|
|
{
|
|
rc = gpg_error (GPG_ERR_CARD);
|
|
log_error ("generating key failed\n");
|
|
goto leave;
|
|
}
|
|
log_info ("key generation completed (%d seconds)\n",
|
|
(int)(time (NULL) - start_at));
|
|
keydata = find_tlv (buffer, buflen, 0x7F49, &keydatalen);
|
|
if (!keydata)
|
|
{
|
|
rc = gpg_error (GPG_ERR_CARD);
|
|
log_error ("response does not contain the public key data\n");
|
|
goto leave;
|
|
}
|
|
|
|
m = find_tlv (keydata, keydatalen, 0x0081, &mlen);
|
|
if (!m)
|
|
{
|
|
rc = gpg_error (GPG_ERR_CARD);
|
|
log_error ("response does not contain the RSA modulus\n");
|
|
goto leave;
|
|
}
|
|
/* log_printhex ("RSA n:", m, mlen); */
|
|
send_key_data (ctrl, "n", m, mlen);
|
|
|
|
e = find_tlv (keydata, keydatalen, 0x0082, &elen);
|
|
if (!e)
|
|
{
|
|
rc = gpg_error (GPG_ERR_CARD);
|
|
log_error ("response does not contain the RSA public exponent\n");
|
|
goto leave;
|
|
}
|
|
/* log_printhex ("RSA e:", e, elen); */
|
|
send_key_data (ctrl, "e", e, elen);
|
|
|
|
created_at = gnupg_get_time ();
|
|
sprintf (numbuf, "%lu", (unsigned long)created_at);
|
|
send_status_info (ctrl, "KEY-CREATED-AT",
|
|
numbuf, (size_t)strlen(numbuf), NULL, 0);
|
|
|
|
rc = store_fpr (app->slot, keyno, (u32)created_at,
|
|
m, mlen, e, elen, fprbuf, app->card_version);
|
|
if (rc)
|
|
goto leave;
|
|
send_fpr_if_not_null (ctrl, "KEY-FPR", -1, fprbuf);
|
|
|
|
|
|
leave:
|
|
xfree (buffer);
|
|
return rc;
|
|
}
|
|
|
|
|
|
static unsigned long
|
|
convert_sig_counter_value (const unsigned char *value, size_t valuelen)
|
|
{
|
|
unsigned long ul;
|
|
|
|
if (valuelen == 3 )
|
|
ul = (value[0] << 16) | (value[1] << 8) | value[2];
|
|
else
|
|
{
|
|
log_error ("invalid structure of OpenPGP card (DO 0x93)\n");
|
|
ul = 0;
|
|
}
|
|
return ul;
|
|
}
|
|
|
|
static unsigned long
|
|
get_sig_counter (app_t app)
|
|
{
|
|
void *relptr;
|
|
unsigned char *value;
|
|
size_t valuelen;
|
|
unsigned long ul;
|
|
|
|
relptr = get_one_do (app, 0x0093, &value, &valuelen);
|
|
if (!relptr)
|
|
return 0;
|
|
ul = convert_sig_counter_value (value, valuelen);
|
|
xfree (relptr);
|
|
return ul;
|
|
}
|
|
|
|
static int
|
|
compare_fingerprint (app_t app, int keyno, unsigned char *sha1fpr)
|
|
{
|
|
const unsigned char *fpr;
|
|
unsigned char *buffer;
|
|
size_t buflen, n;
|
|
int rc, i;
|
|
|
|
assert (keyno >= 1 && keyno <= 3);
|
|
|
|
rc = get_cached_data (app, 0x006E, &buffer, &buflen);
|
|
if (rc)
|
|
{
|
|
log_error ("error reading application data\n");
|
|
return gpg_error (GPG_ERR_GENERAL);
|
|
}
|
|
fpr = find_tlv (buffer, buflen, 0x00C5, &n);
|
|
if (!fpr || n != 60)
|
|
{
|
|
xfree (buffer);
|
|
log_error ("error reading fingerprint DO\n");
|
|
return gpg_error (GPG_ERR_GENERAL);
|
|
}
|
|
fpr += (keyno-1)*20;
|
|
for (i=0; i < 20; i++)
|
|
if (sha1fpr[i] != fpr[i])
|
|
{
|
|
xfree (buffer);
|
|
return gpg_error (GPG_ERR_WRONG_SECKEY);
|
|
}
|
|
xfree (buffer);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* If a fingerprint has been specified check it against the one on
|
|
the card. This is allows for a meaningful error message in case
|
|
the key on the card has been replaced but the shadow information
|
|
known to gpg was not updated. If there is no fingerprint we
|
|
assume that this is okay. */
|
|
static int
|
|
check_against_given_fingerprint (app_t app, const char *fpr, int keyno)
|
|
{
|
|
unsigned char tmp[20];
|
|
const char *s;
|
|
int n;
|
|
|
|
for (s=fpr, n=0; hexdigitp (s); s++, n++)
|
|
;
|
|
if (n != 40)
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
else if (!*s)
|
|
; /* okay */
|
|
else
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
|
|
for (s=fpr, n=0; n < 20; s += 2, n++)
|
|
tmp[n] = xtoi_2 (s);
|
|
return compare_fingerprint (app, keyno, tmp);
|
|
}
|
|
|
|
|
|
|
|
/* Compute a digital signature on INDATA which is expected to be the
|
|
raw message digest. For this application the KEYIDSTR consists of
|
|
the serialnumber and the fingerprint delimited by a slash.
|
|
|
|
Note that this fucntion may return the error code
|
|
GPG_ERR_WRONG_CARD to indicate that the card currently present does
|
|
not match the one required for the requested action (e.g. the
|
|
serial number does not match). */
|
|
static int
|
|
do_sign (app_t app, const char *keyidstr, int hashalgo,
|
|
int (*pincb)(void*, const char *, char **),
|
|
void *pincb_arg,
|
|
const void *indata, size_t indatalen,
|
|
unsigned char **outdata, size_t *outdatalen )
|
|
{
|
|
static unsigned char sha1_prefix[15] = /* Object ID is 1.3.14.3.2.26 */
|
|
{ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03,
|
|
0x02, 0x1a, 0x05, 0x00, 0x04, 0x14 };
|
|
static unsigned char rmd160_prefix[15] = /* Object ID is 1.3.36.3.2.1 */
|
|
{ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x24, 0x03,
|
|
0x02, 0x01, 0x05, 0x00, 0x04, 0x14 };
|
|
int rc;
|
|
unsigned char data[35];
|
|
unsigned char tmp_sn[20]; /* actually 16 but we use it also for the fpr. */
|
|
const char *s;
|
|
int n;
|
|
const char *fpr = NULL;
|
|
unsigned long sigcount;
|
|
|
|
if (!keyidstr || !*keyidstr)
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
if (indatalen != 20)
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
|
|
/* Check whether an OpenPGP card of any version has been requested. */
|
|
if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
|
|
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
|
|
;
|
|
if (n != 32)
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
else if (!*s)
|
|
; /* no fingerprint given: we allow this for now. */
|
|
else if (*s == '/')
|
|
fpr = s + 1;
|
|
else
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
|
|
for (s=keyidstr, n=0; n < 16; s += 2, n++)
|
|
tmp_sn[n] = xtoi_2 (s);
|
|
|
|
if (app->serialnolen != 16)
|
|
return gpg_error (GPG_ERR_INV_CARD);
|
|
if (memcmp (app->serialno, tmp_sn, 16))
|
|
return gpg_error (GPG_ERR_WRONG_CARD);
|
|
|
|
/* If a fingerprint has been specified check it against the one on
|
|
the card. This is allows for a meaningful error message in case
|
|
the key on the card has been replaced but the shadow information
|
|
known to gpg was not updated. If there is no fingerprint, gpg
|
|
will detect a bogus signature anyway due to the
|
|
verify-after-signing feature. */
|
|
rc = fpr? check_against_given_fingerprint (app, fpr, 1) : 0;
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (hashalgo == GCRY_MD_SHA1)
|
|
memcpy (data, sha1_prefix, 15);
|
|
else if (hashalgo == GCRY_MD_RMD160)
|
|
memcpy (data, rmd160_prefix, 15);
|
|
else
|
|
return gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM);
|
|
memcpy (data+15, indata, indatalen);
|
|
|
|
sigcount = get_sig_counter (app);
|
|
log_info ("signatures created so far: %lu\n", sigcount);
|
|
|
|
if (!app->did_chv1 || app->force_chv1 )
|
|
{
|
|
char *pinvalue;
|
|
|
|
{
|
|
char *prompt;
|
|
if (asprintf (&prompt, _("PIN [sigs done: %lu]"), sigcount) < 0)
|
|
return gpg_error_from_errno (errno);
|
|
rc = pincb (pincb_arg, prompt, &pinvalue);
|
|
free (prompt);
|
|
}
|
|
if (rc)
|
|
{
|
|
log_info (_("PIN callback returned error: %s\n"), gpg_strerror (rc));
|
|
return rc;
|
|
}
|
|
|
|
if (strlen (pinvalue) < 6)
|
|
{
|
|
log_error (_("PIN for CHV%d is too short;"
|
|
" minimum length is %d\n"), 1, 6);
|
|
xfree (pinvalue);
|
|
return gpg_error (GPG_ERR_BAD_PIN);
|
|
}
|
|
|
|
rc = iso7816_verify (app->slot, 0x81, pinvalue, strlen (pinvalue));
|
|
if (rc)
|
|
{
|
|
log_error (_("verify CHV%d failed: %s\n"), 1, gpg_strerror (rc));
|
|
xfree (pinvalue);
|
|
flush_cache_after_error (app);
|
|
return rc;
|
|
}
|
|
app->did_chv1 = 1;
|
|
if (!app->did_chv2)
|
|
{
|
|
/* We should also verify CHV2. */
|
|
rc = iso7816_verify (app->slot, 0x82, pinvalue, strlen (pinvalue));
|
|
if (gpg_err_code (rc) == GPG_ERR_BAD_PIN)
|
|
rc = gpg_error (GPG_ERR_PIN_NOT_SYNCED);
|
|
if (rc)
|
|
{
|
|
log_error (_("verify CHV%d failed: %s\n"), 2, gpg_strerror (rc));
|
|
xfree (pinvalue);
|
|
flush_cache_after_error (app);
|
|
return rc;
|
|
}
|
|
app->did_chv2 = 1;
|
|
}
|
|
xfree (pinvalue);
|
|
}
|
|
|
|
rc = iso7816_compute_ds (app->slot, data, 35, outdata, outdatalen);
|
|
return rc;
|
|
}
|
|
|
|
/* Compute a digital signature using the INTERNAL AUTHENTICATE command
|
|
on INDATA which is expected to be the raw message digest. For this
|
|
application the KEYIDSTR consists of the serialnumber and the
|
|
fingerprint delimited by a slash.
|
|
|
|
Note that this fucntion may return the error code
|
|
GPG_ERR_WRONG_CARD to indicate that the card currently present does
|
|
not match the one required for the requested action (e.g. the
|
|
serial number does not match). */
|
|
static int
|
|
do_auth (app_t app, const char *keyidstr,
|
|
int (*pincb)(void*, const char *, char **),
|
|
void *pincb_arg,
|
|
const void *indata, size_t indatalen,
|
|
unsigned char **outdata, size_t *outdatalen )
|
|
{
|
|
int rc;
|
|
unsigned char tmp_sn[20]; /* actually 16 but we use it also for the fpr. */
|
|
const char *s;
|
|
int n;
|
|
const char *fpr = NULL;
|
|
|
|
if (!keyidstr || !*keyidstr)
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
if (indatalen > 50) /* For a 1024 bit key. */
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
|
|
/* Check whether an OpenPGP card of any version has been requested. */
|
|
if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
|
|
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
|
|
;
|
|
if (n != 32)
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
else if (!*s)
|
|
; /* no fingerprint given: we allow this for now. */
|
|
else if (*s == '/')
|
|
fpr = s + 1;
|
|
else
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
|
|
for (s=keyidstr, n=0; n < 16; s += 2, n++)
|
|
tmp_sn[n] = xtoi_2 (s);
|
|
|
|
if (app->serialnolen != 16)
|
|
return gpg_error (GPG_ERR_INV_CARD);
|
|
if (memcmp (app->serialno, tmp_sn, 16))
|
|
return gpg_error (GPG_ERR_WRONG_CARD);
|
|
|
|
/* If a fingerprint has been specified check it against the one on
|
|
the card. This is allows for a meaningful error message in case
|
|
the key on the card has been replaced but the shadow information
|
|
known to gpg was not updated. If there is no fingerprint, gpg
|
|
will detect a bogus signature anyway due to the
|
|
verify-after-signing feature. */
|
|
rc = fpr? check_against_given_fingerprint (app, fpr, 3) : 0;
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = verify_chv2 (app, pincb, pincb_arg);
|
|
if (!rc)
|
|
rc = iso7816_internal_authenticate (app->slot, indata, indatalen,
|
|
outdata, outdatalen);
|
|
return rc;
|
|
}
|
|
|
|
|
|
static int
|
|
do_decipher (app_t app, const char *keyidstr,
|
|
int (pincb)(void*, const char *, char **),
|
|
void *pincb_arg,
|
|
const void *indata, size_t indatalen,
|
|
unsigned char **outdata, size_t *outdatalen )
|
|
{
|
|
int rc;
|
|
unsigned char tmp_sn[20]; /* actually 16 but we use it also for the fpr. */
|
|
const char *s;
|
|
int n;
|
|
const char *fpr = NULL;
|
|
|
|
if (!keyidstr || !*keyidstr || !indatalen)
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
|
|
/* Check whether an OpenPGP card of any version has been requested. */
|
|
if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
|
|
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
|
|
;
|
|
if (n != 32)
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
else if (!*s)
|
|
; /* no fingerprint given: we allow this for now. */
|
|
else if (*s == '/')
|
|
fpr = s + 1;
|
|
else
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
|
|
for (s=keyidstr, n=0; n < 16; s += 2, n++)
|
|
tmp_sn[n] = xtoi_2 (s);
|
|
|
|
if (app->serialnolen != 16)
|
|
return gpg_error (GPG_ERR_INV_CARD);
|
|
if (memcmp (app->serialno, tmp_sn, 16))
|
|
return gpg_error (GPG_ERR_WRONG_CARD);
|
|
|
|
/* If a fingerprint has been specified check it against the one on
|
|
the card. This is allows for a meaningful error message in case
|
|
the key on the card has been replaced but the shadow information
|
|
known to gpg was not updated. If there is no fingerprint, the
|
|
decryption will won't produce the right plaintext anyway. */
|
|
rc = fpr? check_against_given_fingerprint (app, fpr, 2) : 0;
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = verify_chv2 (app, pincb, pincb_arg);
|
|
if (!rc)
|
|
rc = iso7816_decipher (app->slot, indata, indatalen, 0,
|
|
outdata, outdatalen);
|
|
return rc;
|
|
}
|
|
|
|
|
|
/* Perform a simple verify operation for CHV1 and CHV2, so that
|
|
further operations won't ask for CHV2 and it is possible to do a
|
|
cheap check on the PIN: If there is something wrong with the PIN
|
|
entry system, only the regular CHV will get blocked and not the
|
|
dangerous CHV3. KEYIDSTR is the usual card's serial number; an
|
|
optional fingerprint part will be ignored. */
|
|
static int
|
|
do_check_pin (app_t app, const char *keyidstr,
|
|
int (pincb)(void*, const char *, char **),
|
|
void *pincb_arg)
|
|
{
|
|
unsigned char tmp_sn[20];
|
|
const char *s;
|
|
int n;
|
|
|
|
if (!keyidstr || !*keyidstr)
|
|
return gpg_error (GPG_ERR_INV_VALUE);
|
|
|
|
/* Check whether an OpenPGP card of any version has been requested. */
|
|
if (strlen (keyidstr) < 32 || strncmp (keyidstr, "D27600012401", 12))
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
|
|
for (s=keyidstr, n=0; hexdigitp (s); s++, n++)
|
|
;
|
|
if (n != 32)
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
else if (!*s)
|
|
; /* No fingerprint given: we allow this for now. */
|
|
else if (*s == '/')
|
|
; /* We ignore a fingerprint. */
|
|
else
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
|
|
for (s=keyidstr, n=0; n < 16; s += 2, n++)
|
|
tmp_sn[n] = xtoi_2 (s);
|
|
|
|
if (app->serialnolen != 16)
|
|
return gpg_error (GPG_ERR_INV_CARD);
|
|
if (memcmp (app->serialno, tmp_sn, 16))
|
|
return gpg_error (GPG_ERR_WRONG_CARD);
|
|
/* Yes, there is a race conditions: The user might pull the card
|
|
right here and we won't notice that. However this is not a
|
|
problem and the check above is merely for a graceful failure
|
|
between operations. */
|
|
|
|
return verify_chv2 (app, pincb, pincb_arg);
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Select the OpenPGP application on the card in SLOT. This function
|
|
must be used before any other OpenPGP application functions. */
|
|
int
|
|
app_select_openpgp (app_t app)
|
|
{
|
|
static char const aid[] = { 0xD2, 0x76, 0x00, 0x01, 0x24, 0x01 };
|
|
int slot = app->slot;
|
|
int rc;
|
|
unsigned char *buffer;
|
|
size_t buflen;
|
|
void *relptr;
|
|
|
|
rc = iso7816_select_application (slot, aid, sizeof aid);
|
|
if (!rc)
|
|
{
|
|
unsigned int manufacturer;
|
|
|
|
app->apptype = "OPENPGP";
|
|
|
|
app->did_chv1 = 0;
|
|
app->did_chv2 = 0;
|
|
app->did_chv3 = 0;
|
|
app->app_local = NULL;
|
|
|
|
/* The OpenPGP card returns the serial number as part of the
|
|
AID; because we prefer to use OpenPGP serial numbers, we
|
|
replace a possibly already set one from a EF.GDO with this
|
|
one. Note, that for current OpenPGP cards, no EF.GDO exists
|
|
and thus it won't matter at all. */
|
|
rc = iso7816_get_data (slot, 0x004F, &buffer, &buflen);
|
|
if (rc)
|
|
goto leave;
|
|
if (opt.verbose)
|
|
{
|
|
log_info ("AID: ");
|
|
log_printhex ("", buffer, buflen);
|
|
}
|
|
|
|
app->card_version = buffer[6] << 8;
|
|
app->card_version |= buffer[7];
|
|
manufacturer = (buffer[8]<<8 | buffer[9]);
|
|
|
|
xfree (app->serialno);
|
|
app->serialno = buffer;
|
|
app->serialnolen = buflen;
|
|
buffer = NULL;
|
|
app->app_local = xtrycalloc (1, sizeof *app->app_local);
|
|
if (!app->app_local)
|
|
{
|
|
rc = gpg_error (gpg_err_code_from_errno (errno));
|
|
goto leave;
|
|
}
|
|
|
|
relptr = get_one_do (app, 0x00C4, &buffer, &buflen);
|
|
if (!relptr)
|
|
{
|
|
log_error (_("can't access %s - invalid OpenPGP card?\n"),
|
|
"CHV Status Bytes");
|
|
goto leave;
|
|
}
|
|
app->force_chv1 = (buflen && *buffer == 0);
|
|
xfree (relptr);
|
|
|
|
relptr = get_one_do (app, 0x00C0, &buffer, &buflen);
|
|
if (!relptr)
|
|
{
|
|
log_error (_("can't access %s - invalid OpenPGP card?\n"),
|
|
"Extended Capability Flags" );
|
|
goto leave;
|
|
}
|
|
if (buflen)
|
|
{
|
|
app->app_local->extcap.get_challenge = !!(*buffer & 0x40);
|
|
app->app_local->extcap.key_import = !!(*buffer & 0x20);
|
|
app->app_local->extcap.change_force_chv = !!(*buffer & 0x10);
|
|
app->app_local->extcap.private_dos = !!(*buffer & 0x08);
|
|
}
|
|
xfree (relptr);
|
|
|
|
/* Some of the first cards accidently don't set the
|
|
CHANGE_FORCE_CHV bit but allow it anyway. */
|
|
if (app->card_version <= 0x0100 && manufacturer == 1)
|
|
app->app_local->extcap.change_force_chv = 1;
|
|
|
|
parse_login_data (app);
|
|
|
|
if (opt.verbose > 1)
|
|
dump_all_do (slot);
|
|
|
|
app->fnc.deinit = do_deinit;
|
|
app->fnc.learn_status = do_learn_status;
|
|
app->fnc.readcert = NULL;
|
|
app->fnc.getattr = do_getattr;
|
|
app->fnc.setattr = do_setattr;
|
|
app->fnc.genkey = do_genkey;
|
|
app->fnc.sign = do_sign;
|
|
app->fnc.auth = do_auth;
|
|
app->fnc.decipher = do_decipher;
|
|
app->fnc.change_pin = do_change_pin;
|
|
app->fnc.check_pin = do_check_pin;
|
|
}
|
|
|
|
leave:
|
|
if (rc)
|
|
do_deinit (app);
|
|
return rc;
|
|
}
|
|
|
|
|
|
|
|
/* This function is a hack to retrieve essential information about the
|
|
card to be displayed by simple tools. It mostly resembles what the
|
|
LEARN command returns. All parameters return allocated strings or
|
|
buffers or NULL if the data object is not available. All returned
|
|
values are sanitized. */
|
|
int
|
|
app_openpgp_cardinfo (app_t app,
|
|
char **serialno,
|
|
char **disp_name,
|
|
char **pubkey_url,
|
|
unsigned char **fpr1,
|
|
unsigned char **fpr2,
|
|
unsigned char **fpr3)
|
|
{
|
|
int rc;
|
|
void *relptr;
|
|
unsigned char *value;
|
|
size_t valuelen;
|
|
|
|
if (serialno)
|
|
{
|
|
time_t dummy;
|
|
|
|
*serialno = NULL;
|
|
rc = app_get_serial_and_stamp (app, serialno, &dummy);
|
|
if (rc)
|
|
{
|
|
log_error (_("error getting serial number: %s\n"),
|
|
gpg_strerror (rc));
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
if (disp_name)
|
|
{
|
|
*disp_name = NULL;
|
|
relptr = get_one_do (app, 0x005B, &value, &valuelen);
|
|
if (relptr)
|
|
{
|
|
*disp_name = make_printable_string (value, valuelen, 0);
|
|
xfree (relptr);
|
|
}
|
|
}
|
|
|
|
if (pubkey_url)
|
|
{
|
|
*pubkey_url = NULL;
|
|
relptr = get_one_do (app, 0x5F50, &value, &valuelen);
|
|
if (relptr)
|
|
{
|
|
*pubkey_url = make_printable_string (value, valuelen, 0);
|
|
xfree (relptr);
|
|
}
|
|
}
|
|
|
|
if (fpr1)
|
|
*fpr1 = NULL;
|
|
if (fpr2)
|
|
*fpr2 = NULL;
|
|
if (fpr3)
|
|
*fpr3 = NULL;
|
|
relptr = get_one_do (app, 0x00C5, &value, &valuelen);
|
|
if (relptr && valuelen >= 60)
|
|
{
|
|
if (fpr1)
|
|
{
|
|
*fpr1 = xmalloc (20);
|
|
memcpy (*fpr1, value + 0, 20);
|
|
}
|
|
if (fpr2)
|
|
{
|
|
*fpr2 = xmalloc (20);
|
|
memcpy (*fpr2, value + 20, 20);
|
|
}
|
|
if (fpr3)
|
|
{
|
|
*fpr3 = xmalloc (20);
|
|
memcpy (*fpr3, value + 40, 20);
|
|
}
|
|
}
|
|
xfree (relptr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/* This function is currently only used by the sc-copykeys program to
|
|
store a key on the smartcard. app_t ist the application handle,
|
|
KEYNO is the number of the key and PINCB, PINCB_ARG are used to ask
|
|
for the SO PIN. TEMPLATE and TEMPLATE_LEN describe a buffer with
|
|
the key template to store. CREATED_AT is the timestamp used to
|
|
create the fingerprint. M, MLEN is the RSA modulus and E, ELEN the
|
|
RSA public exponent. This function silently overwrites an existing
|
|
key.*/
|
|
int
|
|
app_openpgp_storekey (app_t app, int keyno,
|
|
unsigned char *template, size_t template_len,
|
|
time_t created_at,
|
|
const unsigned char *m, size_t mlen,
|
|
const unsigned char *e, size_t elen,
|
|
int (*pincb)(void*, const char *, char **),
|
|
void *pincb_arg)
|
|
{
|
|
int rc;
|
|
unsigned char fprbuf[20];
|
|
|
|
if (keyno < 1 || keyno > 3)
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
keyno--;
|
|
|
|
rc = verify_chv3 (app, pincb, pincb_arg);
|
|
if (rc)
|
|
goto leave;
|
|
|
|
flush_cache (app);
|
|
|
|
rc = iso7816_put_data (app->slot,
|
|
(app->card_version > 0x0007? 0xE0 : 0xE9) + keyno,
|
|
template, template_len);
|
|
if (rc)
|
|
{
|
|
log_error (_("failed to store the key: %s\n"), gpg_strerror (rc));
|
|
rc = gpg_error (GPG_ERR_CARD);
|
|
goto leave;
|
|
}
|
|
|
|
/* log_printhex ("RSA n:", m, mlen); */
|
|
/* log_printhex ("RSA e:", e, elen); */
|
|
|
|
rc = store_fpr (app->slot, keyno, (u32)created_at,
|
|
m, mlen, e, elen, fprbuf, app->card_version);
|
|
|
|
leave:
|
|
return rc;
|
|
}
|
|
|
|
|
|
/* Utility function for external tools: Read the public RSA key at
|
|
KEYNO and return modulus and exponent in (M,MLEN) and (E,ELEN). */
|
|
int
|
|
app_openpgp_readkey (app_t app, int keyno, unsigned char **m, size_t *mlen,
|
|
unsigned char **e, size_t *elen)
|
|
{
|
|
int rc;
|
|
const unsigned char *keydata, *a;
|
|
unsigned char *buffer;
|
|
size_t buflen, keydatalen, alen;
|
|
|
|
*m = NULL;
|
|
*e = NULL;
|
|
|
|
if (keyno < 1 || keyno > 3)
|
|
return gpg_error (GPG_ERR_INV_ID);
|
|
keyno--;
|
|
|
|
rc = iso7816_read_public_key(app->slot,
|
|
keyno == 0? "\xB6" :
|
|
keyno == 1? "\xB8" : "\xA4",
|
|
2,
|
|
&buffer, &buflen);
|
|
if (rc)
|
|
{
|
|
rc = gpg_error (GPG_ERR_CARD);
|
|
log_error (_("reading the key failed\n"));
|
|
goto leave;
|
|
}
|
|
|
|
keydata = find_tlv (buffer, buflen, 0x7F49, &keydatalen);
|
|
if (!keydata)
|
|
{
|
|
log_error (_("response does not contain the public key data\n"));
|
|
rc = gpg_error (GPG_ERR_CARD);
|
|
goto leave;
|
|
}
|
|
|
|
a = find_tlv (keydata, keydatalen, 0x0081, &alen);
|
|
if (!a)
|
|
{
|
|
log_error (_("response does not contain the RSA modulus\n"));
|
|
rc = gpg_error (GPG_ERR_CARD);
|
|
goto leave;
|
|
}
|
|
*mlen = alen;
|
|
*m = xmalloc (alen);
|
|
memcpy (*m, a, alen);
|
|
|
|
a = find_tlv (keydata, keydatalen, 0x0082, &alen);
|
|
if (!a)
|
|
{
|
|
log_error (_("response does not contain the RSA public exponent\n"));
|
|
rc = gpg_error (GPG_ERR_CARD);
|
|
goto leave;
|
|
}
|
|
*elen = alen;
|
|
*e = xmalloc (alen);
|
|
memcpy (*e, a, alen);
|
|
|
|
leave:
|
|
xfree (buffer);
|
|
if (rc)
|
|
{
|
|
xfree (*m); *m = NULL;
|
|
xfree (*e); *e = NULL;
|
|
}
|
|
return rc;
|
|
}
|