lib/crypto-null.c

   1 /* crypto-null.c --- NULL crypto functions
   2  * Copyright (C) 2002, 2003, 2004  Simon Josefsson
   3  *
   4  * This file is part of Shishi.
   5  *
   6  * Shishi 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 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Shishi 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 Shishi; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  */
  21
  22 #include "internal.h"
  23
  24 #include "crypto.h"
  25
  26 static int
  27 null_encrypt (Shishi * handle,
  28               Shishi_key * key,
  29               int keyusage,
  30               const char *iv, size_t ivlen,
  31               char **ivout, size_t * ivoutlen,
  32               const char *in, size_t inlen, char **out, size_t * outlen)
  33 {
  34   *outlen = inlen;
  35   *out = xmalloc (*outlen);
  36   memcpy (*out, in, inlen);
  37
  38   if (ivout)
  39     *ivout = NULL;
  40   if (ivoutlen)
  41     *ivoutlen = 0;
  42
  43   return SHISHI_OK;
  44 }
  45
  46 static int
  47 null_decrypt (Shishi * handle,
  48               Shishi_key * key,
  49               int keyusage,
  50               const char *iv, size_t ivlen,
  51               char **ivout, size_t * ivoutlen,
  52               const char *in, size_t inlen, char **out, size_t * outlen)
  53 {
  54   *outlen = inlen;
  55   *out = xmalloc (*outlen);
  56   memcpy (*out, in, inlen);
  57
  58   if (ivout)
  59     *ivout = NULL;
  60   if (ivoutlen)
  61     *ivoutlen = 0;
  62
  63   return SHISHI_OK;
  64 }
  65
  66 static int
  67 null_random_to_key (Shishi * handle,
  68                     const char *rnd, size_t rndlen, Shishi_key * outkey)
  69 {
  70   return SHISHI_OK;
  71 }
  72
  73 static int
  74 null_string_to_key (Shishi * handle,
  75                     const char *password, size_t passwordlen,
  76                     const char *salt, size_t saltlen,
  77                     const char *parameter, Shishi_key * outkey)
  78 {
  79   return SHISHI_OK;
  80 }
  81
  82 cipherinfo null_info = {
  83   SHISHI_NULL,
  84   "NULL",
  85   1,
  86   0,
  87   0,
  88   0,
  89   SHISHI_RSA_MD5,
  90   null_random_to_key,
  91   null_string_to_key,
  92   null_encrypt,
  93   null_decrypt
  94 };