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, 2 insertions, 1 deletions

diff --git a/src/decrypt.c b/src/decrypt.c
index eb7ec4d3..8c2cd4d7 100644
--- a/src/decrypt.c
+++ b/src/decrypt.c
@@ -452,7 +452,8 @@ _gpgme_decrypt_start (gpgme_ctx_t ctx, int synchronous,
                                    flags,
                                    cipher, plain,
                                    ctx->export_session_keys,
-                                   ctx->override_session_key);
+                                   ctx->override_session_key,
+                                   ctx->auto_key_retrieve);
 }