core: Implement context flag "override-session-key".

* src/gpgme.c (gpgme_set_ctx_flag): Add flags "export-session-key" and
"override-session-key".
(gpgme_get_ctx_flag): Ditto.
(gpgme_set_export_session_keys): Remove.
(gpgme_get_export_session_keys): Remove.
* src/gpgme.def, src/libgpgme.vers: Remove them.
* src/context.h (struct gpgme_context): Add field
override_session_key.
* src/decrypt-verify.c (decrypt_verify_start): Pass
override_session_key value to the engine.
* src/decrypt.c (decrypt_start): Ditto.
* src/engine.c (_gpgme_engine_op_decrypt): Ditto.
(_gpgme_engine_op_decrypt_verify): Ditto.
* src/engine-backend.h (struct engine_ops): Extend DECRYPT and
DECRYPT_VERIFY_START with override_session_key.
* src/engine-uiserver.c (_uiserver_decrypt): Add stub arg
override_session_key.
(uiserver_decrypt): Ditto.
(uiserver_decrypt_verify): Ditto.
* src/engine-gpgsm.c (gpgsm_decrypt): Ditto.
* src/engine-gpg.c (gpg_decrypt): Add arg override_session_key and set
corresponding gpg option.

* tests/run-decrypt.c (print_result): Print the session key if
available.
(main): Add options --export-session-key and --override-session-key.

--

To keep the number of context manipulation functions at bay, this
patches removes the just added gpgme_set_export_session_keys and
gpgme_get_export_session_keys by flags for the generic context
function.

The patch also implements the --override-session-key feature.

GnuPG-bug-id: 2754
Signed-off-by: Werner Koch <[email protected]>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/decrypt.c b/src/decrypt.c
index 49c735ca..43717c0d 100644
--- a/src/decrypt.c
+++ b/src/decrypt.c
@@ -360,7 +360,7 @@ _gpgme_op_decrypt_init_result (gpgme_ctx_t ctx)
 
 static gpgme_error_t
 decrypt_start (gpgme_ctx_t ctx, int synchronous,
-		      gpgme_data_t cipher, gpgme_data_t plain)
+               gpgme_data_t cipher, gpgme_data_t plain)
 {
   gpgme_error_t err;
 
@@ -390,7 +390,9 @@ decrypt_start (gpgme_ctx_t ctx, int synchronous,
 
   _gpgme_engine_set_status_handler (ctx->engine, decrypt_status_handler, ctx);
 
-  return _gpgme_engine_op_decrypt (ctx->engine, cipher, plain, ctx->export_session_keys);
+  return _gpgme_engine_op_decrypt (ctx->engine, cipher, plain,
+                                   ctx->export_session_keys,
+                                   ctx->override_session_key);
 }