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gpg: Allow decryption w/o public key but with correct card inserted.

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* agent/command.c (cmd_readkey): Add option --no-data and special
handling for $SIGNKEYID and $AUTHKEYID.
* g10/call-agent.c (agent_scd_getattr): Create shadow keys for KEY-FPR
output.
* g10/skclist.c (enum_secret_keys): Automagically get a missing public
key for the current card.

Signed-off-by: Werner Koch <wk@gnupg.org>
Backported-from-master: 50293ec2eb)
This commit is contained in:
Werner Koch 2021-04-23 08:47:06 +02:00
parent 79e8ea100d
commit e53f603728
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
3 changed files with 64 additions and 7 deletions
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10
g10/call-agent.c
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@ -1097,6 +1097,16 @@ agent_scd_getattr (const char *name, struct agent_card_info_s *info)
parm.ctx = agent_ctx;
rc = assuan_transact (agent_ctx, line, NULL, NULL, default_inq_cb, &parm,
learn_status_cb, info);
if (!rc && !strcmp (name, "KEY-FPR"))
{
/* Let the agent create the shadow keys if not yet done. */
if (info->fpr1valid)
assuan_transact (agent_ctx, "READKEY --card --no-data -- $SIGNKEYID",
NULL, NULL, NULL, NULL, NULL, NULL);
if (info->fpr2valid)
assuan_transact (agent_ctx, "READKEY --card --no-data -- $ENCRKEYID",
NULL, NULL, NULL, NULL, NULL, NULL);
}
return rc;
}