scd: Return USAGE information for KEYINFO command.

* scd/command.c (hlp_keyinfo): Update.
(send_keyinfo): Add a USAGE argument.
* scd/scdaemon.h (send_keyinfo): Add a USAGE argument.
* scd/app-nks.c (set_usage_string): New.
(do_learn_status_core, do_readkey): Use set_usage_string.
(do_with_keygrip): Add USAGE to call send_keyinfo,
using set_usage_string.
* scd/app-openpgp.c (get_usage_string): New.
(send_keypair_info): Use get_usage_string.
(send_keyinfo_if_available): Add USAGE to call send_keyinfo,
using get_usage_string.
* scd/app-p15.c (set_usage_string): New.
(send_keypairinfo): Use set_usage_string.
(do_with_keygrip): Add USAGE to call send_keyinfo,
using set_usage_string.
* scd/app-piv.c (do_with_keygrip): Add USAGE to call send_keyinfo.

--

Signed-off-by: NIIBE Yutaka <[email protected]>

1 files changed, 8 insertions, 1 deletions

diff --git a/scd/app-piv.c b/scd/app-piv.c
index 23b50bf99..a51ac31ec 100644
--- a/scd/app-piv.c
+++ b/scd/app-piv.c
@@ -3529,6 +3529,13 @@ do_with_keygrip (app_t app, ctrl_t ctrl, int action,
         }
       else if (!want_keygripstr || !strcmp (keygripstr, want_keygripstr))
         {
+          const char *usage;
+
+          if (data_objects[i].usage)
+            usage = data_objects[i].usage;
+          else
+            usage = "-";
+
           if (capability == GCRY_PK_USAGE_SIGN)
             {
               if (strcmp (data_objects[i].keyref, "9C"))
@@ -3546,7 +3553,7 @@ do_with_keygrip (app_t app, ctrl_t ctrl, int action,
             }
 
           snprintf (idbuf, sizeof idbuf, "PIV.%s", data_objects[i].keyref);
-          send_keyinfo (ctrl, data, keygripstr, serialno, idbuf);
+          send_keyinfo (ctrl, data, keygripstr, serialno, idbuf, usage);
           if (want_keygripstr)
             {
               err = 0; /* Found */