scd: Implement direct access by KEYGRIP for GETATTR and READKEY.

* scd/app-openpgp.c (do_readkey): Handle KEYGRIP access.
* scd/command.c (do_readkey): New.
(cmd_readkey): Use do_readkey supporting KEYGRIP access.
(cmd_getattr): Supporting KEYGRIP access.

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

1 files changed, 15 insertions, 1 deletions

diff --git a/scd/app-openpgp.c b/scd/app-openpgp.c
index b5906f887..2301ba3f5 100644
--- a/scd/app-openpgp.c
+++ b/scd/app-openpgp.c
@@ -1920,7 +1920,21 @@ do_readkey (app_t app, ctrl_t ctrl, const char *keyid, unsigned int flags,
   int keyno;
   unsigned char *buf;
 
-  if (!strcmp (keyid, "OPENPGP.1"))
+  if (strlen (keyid) == 40)
+    {
+      const unsigned char *keygrip_str;
+
+      for (keyno = 0; keyno < 3; keyno++)
+        {
+          keygrip_str = app->app_local->pk[keyno].keygrip_str;
+          if (!strncmp (keygrip_str, keyid, 40))
+            break;
+        }
+
+      if (keyno >= 3)
+        return gpg_error (GPG_ERR_INV_ID);
+    }
+  else if (!strcmp (keyid, "OPENPGP.1"))
     keyno = 0;
   else if (!strcmp (keyid, "OPENPGP.2"))
     keyno = 1;