core: Allow specifying an expiration date for key signatures

* src/context.h (struct gpgme_context): Add 'cert_expire'.
* src/engine-gpg.c (append_args_from_cert_expire): New.
(gpg_edit): Set option according to the new flag.
* src/gpgme.c (gpgme_release): Free 'cert_expire'.
(gpgme_set_ctx_flag, gpgme_get_ctx_flag): Add "cert-expire".

* tests/gpg/Makefile.am (c_tests): Add new test.
(gpg.conf): Write "allow-weak-key-signatures" to gpg.conf.
* tests/gpg/t-edit-sign.c: New.
--

The new context flag "cert-expire" allows setting the expiration date
for key signatures created with gpgme_op_interact.

GnuPG-bug-id: 5336, 5505

1 files changed, 12 insertions, 0 deletions

diff --git a/src/gpgme.c b/src/gpgme.c
index 8bc11d51..255d1165 100644
--- a/src/gpgme.c
+++ b/src/gpgme.c
@@ -253,6 +253,7 @@ gpgme_release (gpgme_ctx_t ctx)
   free (ctx->request_origin);
   free (ctx->auto_key_locate);
   free (ctx->trust_model);
+  free (ctx->cert_expire);
   _gpgme_engine_info_release (ctx->engine_info);
   ctx->engine_info = NULL;
   DESTROY_LOCK (ctx->lock);
@@ -578,6 +579,13 @@ gpgme_set_ctx_flag (gpgme_ctx_t ctx, const char *name, const char *value)
     {
       ctx->extended_edit = abool;
     }
+  else if (!strcmp (name, "cert-expire"))
+    {
+      free (ctx->cert_expire);
+      ctx->cert_expire = strdup (value);
+      if (!ctx->cert_expire)
+        err = gpg_error_from_syserror ();
+    }
   else
     err = gpg_error (GPG_ERR_UNKNOWN_NAME);
 
@@ -647,6 +655,10 @@ gpgme_get_ctx_flag (gpgme_ctx_t ctx, const char *name)
     {
       return ctx->extended_edit ? "1":"";
     }
+  else if (!strcmp (name, "cert-expire"))
+    {
+      return ctx->cert_expire? ctx->cert_expire : "";
+    }
   else
     return NULL;
 }