agent: First changes to support a PIN cache for scdaemon.

* agent/agent.h (CACHE_MODE_PIN): New.
* agent/cache.c (housekeeping): Special handling of new new mode.
(agent_flush_cache): Ditto.  Add arg 'pincache_only' and change
caller.
(agent_put_cache): Support new mode.
(agent_get_cache): Ditto.
* agent/call-scd.c (wait_child_thread): Flush the entire PIN cache.
(start_scd): Ditto.
(agent_card_killscd): Ditto.
(handle_pincache_put): New.  Uses a dummy encryption key for now.
(pincache_put_cb): New.
(inq_needpin): Prepare for PINCACHE_GET inquiry.
(learn_status_cb): Handle the PINENTRY_PUT status line.
(get_serialno_cb): Ditto
(agent_card_pksign): Ditto.
(padding_info_cb): Ditto.
(agent_card_readcert): Ditto.
(agent_card_readkey): Ditto.
(agent_card_writekey): Ditto.
(card_getattr_cb): Ditto.
(card_cardlist_cb): Ditto.
(card_keyinfo_cb): Ditto.
(pass_status_thru): Ditto.
--

Take care: This is not finished.

Signed-off-by: Werner Koch <[email protected]>

1 files changed, 2 insertions, 1 deletions

diff --git a/agent/agent.h b/agent/agent.h
index 84e5e782b..e08507cb2 100644
--- a/agent/agent.h
+++ b/agent/agent.h
@@ -322,6 +322,7 @@ typedef enum
     CACHE_MODE_USER,       /* GET_PASSPHRASE related cache. */
     CACHE_MODE_SSH,        /* SSH related cache. */
     CACHE_MODE_NONCE,      /* This is a non-predictable nonce.  */
+    CACHE_MODE_PIN,        /* PINs stored/retrieved by scdaemon.  */
     CACHE_MODE_DATA        /* Arbitrary data.  */
   }
 cache_mode_t;
@@ -479,7 +480,7 @@ int agent_clear_passphrase (ctrl_t ctrl,
 void initialize_module_cache (void);
 void deinitialize_module_cache (void);
 void agent_cache_housekeeping (void);
-void agent_flush_cache (void);
+void agent_flush_cache (int pincache_only);
 int agent_put_cache (ctrl_t ctrl, const char *key, cache_mode_t cache_mode,
                      const char *data, int ttl);
 char *agent_get_cache (ctrl_t ctrl, const char *key, cache_mode_t cache_mode);