core: Add new context flag "no-symkey-cache".

* src/gpgme.c (gpgme_set_ctx_flag): Set flag.
(gpgme_get_ctx_flag): Get flag.
* src/context.h (struct gpgme_context): Add field no_symkey_cache.
* src/engine-gpg.c (struct engine_gpg): Ditto.
(gpg_set_engine_flags): Set flag.
(build_argv): Pass option --no-symkey-cache to gpg.

* tests/run-decrypt.c (print_result): Fix segv for symmetric messages.
(main): New option --no-symkey-cache.
* tests/run-encrypt.c (main): New option --no-symkey-cache.

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

1 files changed, 22 insertions, 1 deletions

diff --git a/src/engine-gpg.c b/src/engine-gpg.c
index 3b9a6ff5..a37d1f7b 100644
--- a/src/engine-gpg.c
+++ b/src/engine-gpg.c
@@ -145,6 +145,10 @@ struct engine_gpg
   gpgme_pinentry_mode_t pinentry_mode;
   char request_origin[10];
 
+  struct {
+    unsigned int no_symkey_cache : 1;
+  } flags;
+
   /* NULL or the data object fed to --override_session_key-fd.  */
   gpgme_data_t override_session_key;
 };
@@ -642,6 +646,10 @@ gpg_set_engine_flags (void *engine, const gpgme_ctx_t ctx)
       else
         strcpy (gpg->request_origin, ctx->request_origin);
     }
+  else if (ctx->no_symkey_cache && have_gpg_version (gpg, "2.2.7"))
+    {
+      gpg->flags.no_symkey_cache = 1;
+    }
   else
     *gpg->request_origin = 0;
 }
@@ -875,7 +883,7 @@ build_argv (engine_gpg_t gpg, const char *pgmname)
     argc++;
   if (!gpg->cmd.used)
     argc++;	/* --batch */
-  argc += 2;	/* --no-sk-comments, --request-origin */
+  argc += 3;	/* --no-sk-comments, --request-origin, --no-symkey-cache */
 
   argv = calloc (argc + 1, sizeof *argv);
   if (!argv)
@@ -937,6 +945,19 @@ build_argv (engine_gpg_t gpg, const char *pgmname)
       argc++;
     }
 
+  if (gpg->flags.no_symkey_cache)
+    {
+      argv[argc] = strdup ("--no-symkey-cache");
+      if (!argv[argc])
+	{
+          int saved_err = gpg_error_from_syserror ();
+	  free (fd_data_map);
+	  free_argv (argv);
+	  return saved_err;
+        }
+      argc++;
+    }
+
   if (gpg->pinentry_mode && have_gpg_version (gpg, "2.1.0"))
     {
       const char *s = NULL;