gpgsm: Implement a cache for the KEYINFO queries.
* sm/gpgsm.h (struct keyinfo_cache_item_s): New. (struct server_control_s): Add keyinfo_cache and keyinfo_cache_valid. * sm/call-agent.c (keyinfo_cache_disabled): New flag. (release_a_keyinfo_cache): New. (gpgsm_flush_keyinfo_cache): New. (struct keyinfo_status_parm_s): New. (keyinfo_status_cb): Implement a fill mode. (gpgsm_agent_keyinfo): Implement a cache. * sm/server.c (reset_notify): Flush the cache. * sm/gpgsm.c (gpgsm_deinit_default_ctrl): Ditto.
In almost all cases we have just a few private keys in the agent and
thus it is better to fetch them early. This does not work in a
restricted connection but we take care and disable the cache in this
case.
This cache gives a a minor speed up.
- GnuPG-bug-id: T7308