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gpg: Make sure that we are not accidently working with the PIV app.

Browse source 
* g10/call-agent.c (agent_scd_switchapp): New.
* g10/card-util.c (get_info_for_key_operation): Call it.
--

It may happen that the active card was last used for PIV and in that
case certain commands will fail because they assume the OpenPGP app.
Fortunately we have a pretty central place to assure that the right
app has been selected.

The bug can be easily noticed on Windows.

GnuPG-bug-id: 6378
This commit is contained in:
Werner Koch 2023-04-18 17:04:58 +02:00
parent f7e00dc73d
commit fa4f716917
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GPG key ID: E3FDFF218E45B72B
4 changed files with 30 additions and 0 deletions
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g10/card-util.c
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@ -1289,6 +1289,7 @@ get_info_for_key_operation (struct agent_card_info_s *info)
int rc;
memset (info, 0, sizeof *info);
agent_scd_switchapp ("openpgp");
rc = agent_scd_getattr ("SERIALNO", info);
if (rc || !info->serialno || strncmp (info->serialno, "D27600012401", 12)
|| strlen (info->serialno) != 32 )