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The keypad is now also used for OpenPGP signing keys.

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This commit is contained in:
Werner Koch 2006-12-21 12:13:44 +00:00
parent fa17b95b39
commit 0ed45ac1b3
2 changed files with 155 additions and 104 deletions
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8
scd/ChangeLog
View File

@ -1,3 +1,11 @@
2006-12-21 Werner Koch <wk@g10code.com>
* app-openpgp.c (verify_chv2): Factored most code out into...
(verify_a_chv): ... new.
(do_sign): Factored verification code out to new function and
take care of a keypad entered PIN.
(compare_fingerprint): Print an additional diagnostic.
2006-11-28 Werner Koch <wk@g10code.com>
* apdu.c (send_le, apdu_send_direct): Increase RESULTLEN to 258 to

251
scd/app-openpgp.c
View File

@ -1277,6 +1277,121 @@ do_readkey (app_t app, const char *keyid, unsigned char **pk, size_t *pklen)
}
/* Verify a CHV either using using the pinentry or if possibile by
using a keypad. PINCB and PINCB_ARG describe the usual callback
for the pinentry. CHVNO must be either 1 or 2. SIGCOUNT is only
ised with CHV1. PINVALUE is the address of a pointer which will
receive a newly allocated block with the actual PIN (this is useful
in case that PIN shall be used for another verifiy operation). The
caller needs to free this value. If the function returns with
success and NULL is stored at PINVALUE, the caller should take this
as an indication that the keypad has been used.
*/
static gpg_error_t
verify_a_chv (app_t app,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg,
int chvno, unsigned long sigcount, char **pinvalue)
{
int rc = 0;
char *prompt;
iso7816_pininfo_t pininfo;
int minlen = 6;
assert (chvno == 1 || chvno == 2);
*pinvalue = NULL;
memset (&pininfo, 0, sizeof pininfo);
pininfo.mode = 1;
pininfo.minlen = minlen;
if (!opt.disable_keypad
&& !iso7816_check_keypad (app->slot, ISO7816_VERIFY, &pininfo) )
{
/* The reader supports the verify command through the keypad. */
if (chvno == 1)
{
#define PROMPTSTRING _("||Please enter your PIN at the reader's keypad%%0A" \
"[sigs done: %lu]")
size_t promptsize = strlen (PROMPTSTRING) + 50;
prompt = xmalloc (promptsize);
if (!prompt)
return gpg_error_from_syserror ();
snprintf (prompt, promptsize-1, PROMPTSTRING, sigcount);
rc = pincb (pincb_arg, prompt, NULL);
xfree (prompt);
#undef PROMPTSTRING
}
else
rc = pincb (pincb_arg,
_("||Please enter your PIN at the reader's keypad"),
NULL);
if (rc)
{
log_info (_("PIN callback returned error: %s\n"),
gpg_strerror (rc));
return rc;
}
rc = iso7816_verify_kp (app->slot, 0x80+chvno, "", 0, &pininfo);
/* Dismiss the prompt. */
pincb (pincb_arg, NULL, NULL);
assert (!*pinvalue);
}
else
{
/* The reader has no keypad or we don't want to use it. */
if (chvno == 1)
{
#define PROMPTSTRING _("||Please enter the PIN%%0A[sigs done: %lu]")
size_t promptsize = strlen (PROMPTSTRING) + 50;
prompt = xmalloc (promptsize);
if (!prompt)
return gpg_error_from_syserror ();
snprintf (prompt, promptsize-1, PROMPTSTRING, sigcount);
rc = pincb (pincb_arg, prompt, pinvalue);
xfree (prompt);
#undef PROMPTSTRING
}
else
rc = pincb (pincb_arg, "PIN", pinvalue);
if (rc)
{
log_info (_("PIN callback returned error: %s\n"),
gpg_strerror (rc));
return rc;
}
if (strlen (*pinvalue) < minlen)
{
log_error (_("PIN for CHV%d is too short;"
" minimum length is %d\n"), chvno, minlen);
xfree (*pinvalue);
*pinvalue = NULL;
return gpg_error (GPG_ERR_BAD_PIN);
}
rc = iso7816_verify (app->slot, 0x80+chvno,
*pinvalue, strlen (*pinvalue));
}
if (rc)
{
log_error (_("verify CHV%d failed: %s\n"), chvno, gpg_strerror (rc));
xfree (*pinvalue);
*pinvalue = NULL;
flush_cache_after_error (app);
}
return rc;
}
/* Verify CHV2 if required. Depending on the configuration of the
card CHV1 will also be verified. */
@ -1285,86 +1400,41 @@ verify_chv2 (app_t app,
gpg_error_t (*pincb)(void*, const char *, char **),
void *pincb_arg)
{
int rc = 0;
int rc;
char *pinvalue;
if (!app->did_chv2)
if (app->did_chv2)
return 0; /* We already verified CHV2. */
rc = verify_a_chv (app, pincb, pincb_arg, 2, 0, &pinvalue);
if (rc)
return rc;
app->did_chv2 = 1;
if (!app->did_chv1 && !app->force_chv1 && pinvalue)
{
char *pinvalue;
iso7816_pininfo_t pininfo;
int did_keypad = 0;
memset (&pininfo, 0, sizeof pininfo);
pininfo.mode = 1;
pininfo.minlen = 6;
if (!opt.disable_keypad
&& !iso7816_check_keypad (app->slot, ISO7816_VERIFY, &pininfo) )
{
/* The reader supports the verify command through the keypad. */
did_keypad = 1;
rc = pincb (pincb_arg,
_("||Please enter your PIN at the reader's keypad"),
NULL);
if (rc)
{
log_info (_("PIN callback returned error: %s\n"),
gpg_strerror (rc));
return rc;
}
rc = iso7816_verify_kp (app->slot, 0x82, "", 0, &pininfo);
/* Dismiss the prompt. */
pincb (pincb_arg, NULL, NULL);
}
else
{
/* The reader has no keypad or we don't want to use it. */
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));
}
/* For convenience we verify CHV1 here too. We do this only if
the card is not configured to require a verification before
each CHV1 controlled operation (force_chv1) and if we are not
using the keypad (PINVALUE == NULL). */
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"), 2, gpg_strerror (rc));
xfree (pinvalue);
log_error (_("verify CHV%d failed: %s\n"), 1, gpg_strerror (rc));
flush_cache_after_error (app);
return rc;
}
app->did_chv2 = 1;
if (!app->did_chv1 && !app->force_chv1 && !did_keypad)
{
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);
else
app->did_chv1 = 1;
}
xfree (pinvalue);
return rc;
}
/* Verify CHV3 if required. */
static gpg_error_t
verify_chv3 (app_t app,
@ -2076,6 +2146,7 @@ compare_fingerprint (app_t app, int keyno, unsigned char *sha1fpr)
if (sha1fpr[i] != fpr[i])
{
xfree (buffer);
log_info (_("fingerprint on card does not match requested one\n"));
return gpg_error (GPG_ERR_WRONG_SECKEY);
}
xfree (buffer);
@ -2230,44 +2301,16 @@ do_sign (app_t app, const char *keyidstr, int hashalgo,
{
char *pinvalue;
{
char *prompt;
#define PROMPTSTRING _("||Please enter the PIN%%0A[sigs done: %lu]")
prompt = malloc (strlen (PROMPTSTRING) + 50);
if (!prompt)
return gpg_error_from_syserror ();
sprintf (prompt, PROMPTSTRING, sigcount);
rc = pincb (pincb_arg, prompt, &pinvalue);
free (prompt);
#undef PROMPTSTRING
}
rc = verify_a_chv (app, pincb, pincb_arg, 1, sigcount, &pinvalue);
if (rc)
{
log_info (_("PIN callback returned error: %s\n"), gpg_strerror (rc));
return 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)
if (!app->did_chv2 && pinvalue)
{
/* We should also verify CHV2. */
/* We should also verify CHV2. Note, that we can't do that
if the keypad has been used. */
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);