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gpg: Robust error handling for SCD READKEY.

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* g10/keygen.c (ask_algo): List the card key only when it's valid.

--

GnuPG-bug-id: 7309
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2024-10-01 10:55:11 +09:00
parent 0e283a0ebc
commit e789122578
No known key found for this signature in database
GPG Key ID: 640114AF89DE6054
1 changed files with 10 additions and 8 deletions
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14
g10/keygen.c
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@ -2779,12 +2779,14 @@ ask_algo (ctrl_t ctrl, int addmode, int *r_subkey_algo, unsigned int *r_usage,
const char *keyref = kpi->idstr;
int any = 0;
if (keyref
&& !agent_scd_readkey (ctrl, keyref, &s_pkey, NULL))
{
if (!keyref)
continue;
if (!agent_scd_readkey (ctrl, keyref, &s_pkey, NULL))
continue;
algostr = pubkey_algo_string (s_pkey, &algoid);
gcry_sexp_release (s_pkey);
}
/* We need to tweak the algo in case GCRY_PK_ECC is
* returned because pubkey_algo_string is not aware
@ -2857,9 +2859,9 @@ ask_algo (ctrl_t ctrl, int addmode, int *r_subkey_algo, unsigned int *r_usage,
for (count=1,kpi=keypairlist; kpi; kpi = kpi->next, count++)
if (count == selection)
break;
if (!kpi)
if (!kpi || !kpi->algo)
{
/* Just in case COUNT is zero (no keys). */
/* Just in case no good key. */
free_keypair_info (keypairlist);
goto ask_again;
}