core: New context flag "auto-key-retrieve"

* src/gpgme.c (gpgme_set_ctx_flag, gpgme_get_ctx_flag): New flag
"auto-key-retrieve".
* src/context.h (gpgme_context): New field auto_key_retrieve.
* src/engine-backend.h (struct engine_ops): Add arg auto_key_retrieve
to field 'decrypt'.
* src/engine-gpg.c (gpg_decrypt): Add arg auto_key_retrieve and pass
option --auto-key-retrieve to gpg.  Adjust all callers.
(gpg_verify): Ditto.
* src/engine-gpgsm.c (gpgsm_decrypt): Add dummy arg auto_key_retrieve.
* src/engine-uiserver.c (uiserver_decrypt): Ditto.
* tests/run-verify.c (main): Add option --auto-key-retrieve.
--

This makes the --auto-key-retrieve option available in the GPGME API.

Test plan:
Run

  GPGME_DEBUG=9:out tests/run-verify SIGNEDFILE

with and without its new option --auto-key-retrieve and check in the
trace stored in "out" whether --auto-key-retrieve was passed to gpg.

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

1 files changed, 5 insertions, 1 deletions

diff --git a/src/engine-gpgsm.c b/src/engine-gpgsm.c
index f23b0bfd..e337fedd 100644
--- a/src/engine-gpgsm.c
+++ b/src/engine-gpgsm.c
@@ -1130,7 +1130,8 @@ static gpgme_error_t
 gpgsm_decrypt (void *engine,
                gpgme_decrypt_flags_t flags,
                gpgme_data_t ciph, gpgme_data_t plain,
-               int export_session_key, const char *override_session_key)
+               int export_session_key, const char *override_session_key,
+               int auto_key_retrieve)
 {
   engine_gpgsm_t gpgsm = engine;
   gpgme_error_t err;
@@ -1142,6 +1143,9 @@ gpgsm_decrypt (void *engine,
   (void)export_session_key;
   (void)override_session_key;
 
+  /* --auto-key-retrieve is also not supported.  */
+  (void)auto_key_retrieve;
+
   if (!gpgsm)
     return gpg_error (GPG_ERR_INV_VALUE);