From a2d1673d6622e39c41f061e1bffb5ca05c803320 Mon Sep 17 00:00:00 2001
From: Werner Koch <wk@gnupg.org>
Date: Mon, 25 Jul 2005 14:35:04 +0000
Subject: * findkey.c (agent_public_key_from_file): Fixed array assignment.
 This was the cause for random segvs.

* call-agent.c (gpgsm_agent_readkey): New.
---
 sm/call-agent.c | 47 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 46 insertions(+), 1 deletion(-)

(limited to 'sm/call-agent.c')

diff --git a/sm/call-agent.c b/sm/call-agent.c
index 92a29928c..c47f6b19a 100644
--- a/sm/call-agent.c
+++ b/sm/call-agent.c
@@ -1,5 +1,5 @@
 /* call-agent.c - divert operations to the agent
- *	Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+ *	Copyright (C) 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
  *
  * This file is part of GnuPG.
  *
@@ -432,6 +432,51 @@ gpgsm_agent_genkey (ctrl_t ctrl,
   return 0;
 }
 
+
+/* Call the agent to read the public key part for a given keygrip.  */
+int
+gpgsm_agent_readkey (ctrl_t ctrl, const char *hexkeygrip,
+                     ksba_sexp_t *r_pubkey)
+{
+  int rc;
+  membuf_t data;
+  size_t len;
+  unsigned char *buf;
+  char line[ASSUAN_LINELENGTH];
+
+  *r_pubkey = NULL;
+  rc = start_agent (ctrl);
+  if (rc)
+    return rc;
+
+  rc = assuan_transact (agent_ctx, "RESET",NULL, NULL, NULL, NULL, NULL, NULL);
+  if (rc)
+    return map_assuan_err (rc);
+
+  snprintf (line, DIM(line)-1, "READKEY %s", hexkeygrip);
+  line[DIM(line)-1] = 0;
+
+  init_membuf (&data, 1024);
+  rc = assuan_transact (agent_ctx, line,
+                        membuf_data_cb, &data, 
+                        NULL, NULL, NULL, NULL);
+  if (rc)
+    {
+      xfree (get_membuf (&data, &len));
+      return map_assuan_err (rc);
+    }
+  buf = get_membuf (&data, &len);
+  if (!buf)
+    return gpg_error (GPG_ERR_ENOMEM);
+  if (!gcry_sexp_canon_len (buf, len, NULL, NULL))
+    {
+      xfree (buf);
+      return gpg_error (GPG_ERR_INV_SEXP);
+    }
+  *r_pubkey = buf;
+  return 0;
+}
+
 
 /* Ask the agent whether the certificate is in the list of trusted
    keys */
-- 
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