tests: Add new test tool run-decrypt

* tests/run-decrypt.c: New.
* tests/Makefile.am (noinst_PROGRAMS): Add run-decrypt.

tests/Makefile.am

@@ -32,7 +32,7 @@ LDADD = ../src/libgpgme.la @GPG_ERROR_LIBS@
 noinst_HEADERS = run-support.h
 
 noinst_PROGRAMS = $(TESTS) run-keylist run-export run-import run-sign \
-		  run-verify run-encrypt run-identify
+		  run-verify run-encrypt run-identify run-decrypt
 
 
 if RUN_GPG_TESTS

tests/run-decrypt.c

@@ -0,0 +1,189 @@
+/* run-decrypt.c  - Helper to perform a verify operation
+   Copyright (C) 2009 g10 Code GmbH
+                 2016 Intevation GmbH
+
+   This file is part of GPGME.
+
+   GPGME is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of
+   the License, or (at your option) any later version.
+
+   GPGME is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* We need to include config.h so that we know whether we are building
+   with large file system (LFS) support. */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <gpgme.h>
+
+#define PGM "run-decrypt"
+
+#include "run-support.h"
+
+
+static int verbose;
+
+static gpg_error_t
+status_cb (void *opaque, const char *keyword, const char *value)
+{
+  (void)opaque;
+  fprintf (stderr, "status_cb: %s %s\n", keyword, value);
+  return 0;
+}
+
+
+static void
+print_result (gpgme_decrypt_result_t result)
+{
+  gpgme_recipient_t recp;
+  int count = 0;
+  printf ("Original file name: %s\n", nonnull(result->file_name));
+  printf ("Wrong key usage: %i\n", result->wrong_key_usage);
+  printf ("Unsupported algorithm: %s\n ", nonnull(result->unsupported_algorithm));
+
+  for (recp = result->recipients; recp->next; recp = recp->next)
+    {
+      printf ("recipient %d\n", count++);
+      printf ("  status ....: %s\n", gpgme_strerror (recp->status));
+      printf ("  keyid: %s\n", nonnull (recp->keyid));
+      printf ("  algo ...: %s\n", gpgme_pubkey_algo_name (recp->pubkey_algo));
+    }
+}
+
+
+static int
+show_usage (int ex)
+{
+  fputs ("usage: " PGM " [options] FILE\n\n"
+         "Options:\n"
+         "  --verbose        run in verbose mode\n"
+         "  --status         print status lines from the backend\n"
+         "  --openpgp        use the OpenPGP protocol (default)\n"
+         "  --cms            use the CMS protocol\n"
+         , stderr);
+  exit (ex);
+}
+
+
+int
+main (int argc, char **argv)
+{
+  int last_argc = -1;
+  gpgme_error_t err;
+  gpgme_ctx_t ctx;
+  gpgme_protocol_t protocol = GPGME_PROTOCOL_OpenPGP;
+  FILE *fp_in = NULL;
+  gpgme_data_t in = NULL;
+  gpgme_data_t out = NULL;
+  gpgme_decrypt_result_t result;
+  int print_status = 0;
+
+  if (argc)
+    { argc--; argv++; }
+
+  while (argc && last_argc != argc )
+    {
+      last_argc = argc;
+      if (!strcmp (*argv, "--"))
+        {
+          argc--; argv++;
+          break;
+        }
+      else if (!strcmp (*argv, "--help"))
+        show_usage (0);
+      else if (!strcmp (*argv, "--verbose"))
+        {
+          verbose = 1;
+          argc--; argv++;
+        }
+      else if (!strcmp (*argv, "--status"))
+        {
+          print_status = 1;
+          argc--; argv++;
+        }
+      else if (!strcmp (*argv, "--openpgp"))
+        {
+          protocol = GPGME_PROTOCOL_OpenPGP;
+          argc--; argv++;
+        }
+      else if (!strcmp (*argv, "--cms"))
+        {
+          protocol = GPGME_PROTOCOL_CMS;
+          argc--; argv++;
+        }
+      else if (!strncmp (*argv, "--", 2))
+        show_usage (1);
+
+    }
+
+  if (argc < 1 || argc > 2)
+    show_usage (1);
+
+  fp_in = fopen (argv[0], "rb");
+  if (!fp_in)
+    {
+      err = gpgme_error_from_syserror ();
+      fprintf (stderr, PGM ": can't open `%s': %s\n",
+               argv[0], gpgme_strerror (err));
+      exit (1);
+    }
+
+  init_gpgme (protocol);
+
+  err = gpgme_new (&ctx);
+  fail_if_err (err);
+  gpgme_set_protocol (ctx, protocol);
+  if (print_status)
+    {
+      gpgme_set_status_cb (ctx, status_cb, NULL);
+      gpgme_set_ctx_flag (ctx, "full-status", "1");
+    }
+
+  err = gpgme_data_new_from_stream (&in, fp_in);
+  if (err)
+    {
+      fprintf (stderr, PGM ": error allocating data object: %s\n",
+               gpgme_strerror (err));
+      exit (1);
+    }
+
+  err = gpgme_data_new (&out);
+  if (err)
+    {
+      fprintf (stderr, PGM ": error allocating data object: %s\n",
+               gpgme_strerror (err));
+      exit (1);
+    }
+
+  err = gpgme_op_decrypt (ctx, in, out);
+  result = gpgme_op_decrypt_result (ctx);
+  if (err)
+    {
+      fprintf (stderr, PGM ": decrypt failed: %s\n", gpgme_strerror (err));
+      exit (1);
+    }
+  if (result) {
+    print_result (result);
+    print_data (out);
+  }
+
+  gpgme_data_release (out);
+  gpgme_data_release (in);
+
+  gpgme_release (ctx);
+  return 0;
+}