gpg: Make decryption with the OpenPGP card work.

* scd/app-common.h (APP_DECIPHER_INFO_NOPAD): New.
* scd/app-openpgp.c (do_decipher): Add arg R_INFO.
* scd/app-nks.c (do_decipher): Add arg R_INFO as a dummy.
* scd/app.c (app_decipher): Add arg R_INFO.
* scd/command.c (cmd_pkdecrypt): Print status line "PADDING".
* agent/call-scd.c (padding_info_cb): New.
(agent_card_pkdecrypt): Add arg R_PADDING.
* agent/divert-scd.c (divert_pkdecrypt): Ditto.
* agent/pkdecrypt.c (agent_pkdecrypt): Ditto.
* agent/command.c (cmd_pkdecrypt):  Print status line "PADDING".
* g10/call-agent.c (padding_info_cb): New.
(agent_pkdecrypt): Add arg R_PADDING.
* g10/pubkey-enc.c (get_it): Use padding info.
--

Decryption using a card never worked in gpg 2.1 because the
information whether the pkcs#1 padding needs to be removed was not
available.  Gpg < 2.1 too this info from the secret sub key but that
has gone in 2.1.

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

1 files changed, 10 insertions, 2 deletions

diff --git a/agent/command.c b/agent/command.c
index 8e5d1803a..938778ac4 100644
--- a/agent/command.c
+++ b/agent/command.c
@@ -865,6 +865,7 @@ cmd_pkdecrypt (assuan_context_t ctx, char *line)
   unsigned char *value;
   size_t valuelen;
   membuf_t outbuf;
+  int padding;
 
   (void)line;
 
@@ -879,12 +880,19 @@ cmd_pkdecrypt (assuan_context_t ctx, char *line)
   init_membuf (&outbuf, 512);
 
   rc = agent_pkdecrypt (ctrl, ctrl->server_local->keydesc,
-                        value, valuelen, &outbuf);
+                        value, valuelen, &outbuf, &padding);
   xfree (value);
   if (rc)
     clear_outbuf (&outbuf);
   else
-    rc = write_and_clear_outbuf (ctx, &outbuf);
+    {
+      if (padding != -1)
+        rc = print_assuan_status (ctx, "PADDING", "%d", padding);
+      else
+        rc = 0;
+      if (!rc)
+        rc = write_and_clear_outbuf (ctx, &outbuf);
+    }
   xfree (ctrl->server_local->keydesc);
   ctrl->server_local->keydesc = NULL;
   return leave_cmd (ctx, rc);