Some changes to suport g13.

g13/backend.c

@@ -0,0 +1,83 @@
+/* backend.c - Dispatcher to the various backends.
+ * Copyright (C) 2009 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include "g13.h"
+#include "i18n.h"
+#include "keyblob.h"
+#include "backend.h"
+#include "be-encfs.h"
+#include "be-truecrypt.h"
+
+
+static gpg_error_t
+no_such_backend (int conttype)
+{
+  log_error ("invalid backend %d given - this is most likely a bug\n",
+             conttype);
+  return gpg_error (GPG_ERR_INTERNAL);
+}
+
+
+/* If the backend requires a separate file or directory for the
+   container, return its name by computing it from FNAME which gives
+   the g13 filename.  The new file name is allocated and stored at
+   R_NAME, if this is expected to be a directory true is stored at
+   R_ISDIR.  If no detached name is expected or an error occurs NULL
+   is stored at R_NAME. The function returns 0 on success or an error
+   code.  */
+gpg_error_t
+be_get_detached_name (int conttype, const char *fname,
+                      char **r_name, int *r_isdir)
+{
+  *r_name = NULL;
+  *r_isdir = 0;
+  switch (conttype)
+    {
+    case CONTTYPE_ENCFS: 
+      return be_encfs_get_detached_name (fname, r_name, r_isdir);
+
+    default:
+      return no_such_backend (conttype);
+    }
+}
+
+
+gpg_error_t
+be_create_new_keys (int conttype, membuf_t *mb)
+{
+  switch (conttype)
+    {
+    case CONTTYPE_ENCFS: 
+      return be_encfs_create_new_keys (mb);
+
+    case CONTTYPE_TRUECRYPT: 
+      return be_truecrypt_create_new_keys (mb);
+
+    default:
+      return no_such_backend (conttype);
+    }
+}
+