g13/backend.c

   1 /* backend.c - Dispatcher to the various backends.
   2  * Copyright (C) 2009 Free Software Foundation, Inc.
   3  *
   4  * This file is part of GnuPG.
   5  *
   6  * GnuPG is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GnuPG is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <errno.h>
  25 #include <unistd.h>
  26
  27 #include "g13.h"
  28 #include "i18n.h"
  29 #include "keyblob.h"
  30 #include "backend.h"
  31 #include "be-encfs.h"
  32 #include "be-truecrypt.h"
  33
  34
  35 static gpg_error_t
  36 no_such_backend (int conttype)
  37 {
  38   log_error ("invalid backend %d given - this is most likely a bug\n",
  39              conttype);
  40   return gpg_error (GPG_ERR_INTERNAL);
  41 }
  42
  43
  44 /* If the backend requires a separate file or directory for the
  45    container, return its name by computing it from FNAME which gives
  46    the g13 filename.  The new file name is allocated and stored at
  47    R_NAME, if this is expected to be a directory true is stored at
  48    R_ISDIR.  If no detached name is expected or an error occurs NULL
  49    is stored at R_NAME. The function returns 0 on success or an error
  50    code.  */
  51 gpg_error_t
  52 be_get_detached_name (int conttype, const char *fname,
  53                       char **r_name, int *r_isdir)
  54 {
  55   *r_name = NULL;
  56   *r_isdir = 0;
  57   switch (conttype)
  58     {
  59     case CONTTYPE_ENCFS:
  60       return be_encfs_get_detached_name (fname, r_name, r_isdir);
  61
  62     default:
  63       return no_such_backend (conttype);
  64     }
  65 }
  66
  67
  68 gpg_error_t
  69 be_create_new_keys (int conttype, membuf_t *mb)
  70 {
  71   switch (conttype)
  72     {
  73     case CONTTYPE_ENCFS:
  74       return be_encfs_create_new_keys (mb);
  75
  76     case CONTTYPE_TRUECRYPT:
  77       return be_truecrypt_create_new_keys (mb);
  78
  79     default:
  80       return no_such_backend (conttype);
  81     }
  82 }
  83