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Make use of the card's extended capabilities.

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This commit is contained in:
Werner Koch 2009-07-22 17:21:47 +00:00
parent ef2995f5d0
commit b37b85e722
4 changed files with 89 additions and 13 deletions
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7
g10/ChangeLog
View File

@ -1,5 +1,11 @@
2009-07-22 Werner Koch <wk@g10code.com>
* card-util.c (generate_card_keys): Ask for off-card keys only if
the card supports it.
(get_info_for_key_operation): Read EXTCAP.
(card_store_subkey): Check for non matching sizes.
* call-agent.h (struct agent_card_info_s): Add field EXTCAP.
* call-agent.c (agent_learn): Use a direct SCD command.
(did_early_card_test): New.
(start_agent): Perform an early test for the card. Add arg FOR_CARD.
@ -7,6 +13,7 @@
(agent_scd_setattr, agent_scd_writekey, agent_scd_genkey)
(agent_scd_pksign, agent_scd_pkdecrypt, agent_scd_change_pin)
(agent_scd_checkpin): Call new function.
(learn_status_cb): Parse KEY_TIME and EXTCAP.
* gpg.c (main) <aFixTrustDB>: Show commands to run.
* trustdb.c (how_to_fix_the_trustdb): New.

38
g10/call-agent.c
View File

@ -366,6 +366,30 @@ learn_status_cb (void *opaque, const char *line)
xfree (buf);
}
}
else if (keywordlen == 6 && !memcmp (keyword, "EXTCAP", keywordlen))
{
char *p, *p2, *buf;
int abool;
buf = p = unescape_status_string (line);
if (buf)
{
for (p = strtok (buf, " "); p; p = strtok (NULL, " "))
{
p2 = strchr (p, '=');
if (p2)
{
*p2++ = 0;
abool = (*p2 == '1');
if (!strcmp (p, "ki"))
parm->extcap.ki = abool;
else if (!strcmp (p, "aac"))
parm->extcap.aac = abool;
}
}
xfree (buf);
}
}
else if (keywordlen == 7 && !memcmp (keyword, "KEY-FPR", keywordlen))
{
int no = atoi (line);
@ -380,6 +404,20 @@ learn_status_cb (void *opaque, const char *line)
else if (no == 3)
parm->fpr3valid = unhexify_fpr (line, parm->fpr3);
}
else if (keywordlen == 8 && !memcmp (keyword, "KEY-TIME", keywordlen))
{
int no = atoi (line);
while (* line && !spacep (line))
line++;
while (spacep (line))
line++;
if (no == 1)
parm->fpr1time = strtoul (line, NULL, 10);
else if (no == 2)
parm->fpr2time = strtoul (line, NULL, 10);
else if (no == 3)
parm->fpr3time = strtoul (line, NULL, 10);
}
else if (keywordlen == 6 && !memcmp (keyword, "CA-FPR", keywordlen))
{
int no = atoi (line);

4
g10/call-agent.h
View File

@ -57,6 +57,10 @@ struct agent_card_info_s
int algo; /* Algorithm identifier. */
unsigned int nbits; /* Supported keysize. */
} key_attr[3];
struct {
unsigned int ki:1; /* Key import available. */
unsigned int aac:1; /* Algorithm attributes are changeable. */
} extcap;
};
struct agent_card_genkey_s {

37
g10/card-util.c
View File

@ -1156,6 +1156,8 @@ get_info_for_key_operation (struct agent_card_info_s *info)
rc = agent_scd_getattr ("CHV-STATUS", info);
if (!rc)
rc = agent_scd_getattr ("DISP-NAME", info);
if (!rc)
rc = agent_scd_getattr ("EXTCAP", info);
if (rc)
log_error (_("error getting current key info: %s\n"), gpg_strerror (rc));
return rc;
@ -1261,21 +1263,27 @@ generate_card_keys (void)
if (get_info_for_key_operation (&info))
return;
#if GNUPG_MAJOR_VERSION == 1
if (info.extcap.ki)
{
char *answer=cpr_get("cardedit.genkeys.backup_enc",
#if GNUPG_MAJOR_VERSION == 1
char *answer;
answer = cpr_get ("cardedit.genkeys.backup_enc",
_("Make off-card backup of encryption key? (Y/n) "));
want_backup=answer_is_yes_no_default(answer,1);
cpr_kill_prompt();
xfree(answer);
}
#else
want_backup = cpr_get_answer_is_yes
( "cardedit.genkeys.backup_enc",
_("Make off-card backup of encryption key? (Y/n) "));
/*FIXME: we need answer_is_yes_no_default()*/
#endif
}
else
want_backup = 0;
if ( (info.fpr1valid && !fpr_is_zero (info.fpr1))
|| (info.fpr2valid && !fpr_is_zero (info.fpr2))
@ -1383,6 +1391,8 @@ card_store_subkey (KBNODE node, int use)
size_t n;
const char *s;
int allow_keyno[3];
unsigned int nbits;
assert (node->pkt->pkttype == PKT_SECRET_KEY
|| node->pkt->pkttype == PKT_SECRET_SUBKEY);
@ -1391,10 +1401,18 @@ card_store_subkey (KBNODE node, int use)
if (get_info_for_key_operation (&info))
return 0;
if (!info.extcap.ki)
{
tty_printf ("The card does not support the import of keys\n");
tty_printf ("\n");
goto leave;
}
show_card_key_info (&info);
if (!is_RSA (sk->pubkey_algo)
|| (!info.is_v2 && nbits_from_sk (sk) != 1024) )
nbits = nbits_from_sk (sk);
if (!is_RSA (sk->pubkey_algo) || (!info.is_v2 && nbits != 1024) )
{
tty_printf ("You may only store a 1024 bit RSA key on the card\n");
tty_printf ("\n");
@ -1427,7 +1445,16 @@ card_store_subkey (KBNODE node, int use)
keyno = *answer? atoi(answer): 0;
xfree(answer);
if (keyno >= 1 && keyno <= 3 && allow_keyno[keyno-1])
{
if (info.is_v2 && !info.extcap.aac
&& info.key_attr[keyno-1].nbits != nbits)
{
tty_printf ("Key does not match the card's capability.\n");
}
else
break; /* Okay. */
}
else
tty_printf(_("Invalid selection.\n"));
}