lib/crypto-null.c

   1 /* crypto-null.c --- NULL crypto functions
   2  * Copyright (C) 2002, 2003, 2004, 2007  Simon Josefsson
   3  *
   4  * This file is part of Shishi.
   5  *
   6  * Shishi is free software; you can redistribute it and/or modify it
   7  * 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  * Shishi is distributed in the hope that it will be useful, but
  12  * 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, see http://www.gnu.org/licenses or write
  18  * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
  19  * Floor, Boston, MA 02110-1301, USA
  20  *
  21  */
  22
  23 #include "internal.h"
  24
  25 #include "crypto.h"
  26
  27 static int
  28 null_encrypt (Shishi * handle,
  29               Shishi_key * key,
  30               int keyusage,
  31               const char *iv, size_t ivlen,
  32               char **ivout, size_t * ivoutlen,
  33               const char *in, size_t inlen, char **out, size_t * outlen)
  34 {
  35   *outlen = inlen;
  36   *out = xmalloc (*outlen);
  37   memcpy (*out, in, inlen);
  38
  39   if (ivout)
  40     *ivout = NULL;
  41   if (ivoutlen)
  42     *ivoutlen = 0;
  43
  44   return SHISHI_OK;
  45 }
  46
  47 static int
  48 null_decrypt (Shishi * handle,
  49               Shishi_key * key,
  50               int keyusage,
  51               const char *iv, size_t ivlen,
  52               char **ivout, size_t * ivoutlen,
  53               const char *in, size_t inlen, char **out, size_t * outlen)
  54 {
  55   *outlen = inlen;
  56   *out = xmalloc (*outlen);
  57   memcpy (*out, in, inlen);
  58
  59   if (ivout)
  60     *ivout = NULL;
  61   if (ivoutlen)
  62     *ivoutlen = 0;
  63
  64   return SHISHI_OK;
  65 }
  66
  67 static int
  68 null_random_to_key (Shishi * handle,
  69                     const char *rnd, size_t rndlen, Shishi_key * outkey)
  70 {
  71   return SHISHI_OK;
  72 }
  73
  74 static int
  75 null_string_to_key (Shishi * handle,
  76                     const char *password, size_t passwordlen,
  77                     const char *salt, size_t saltlen,
  78                     const char *parameter, Shishi_key * outkey)
  79 {
  80   return SHISHI_OK;
  81 }
  82
  83 cipherinfo null_info = {
  84   SHISHI_NULL,
  85   "NULL",
  86   1,
  87   0,
  88   0,
  89   0,
  90   SHISHI_RSA_MD5,
  91   null_random_to_key,
  92   null_string_to_key,
  93   null_encrypt,
  94   null_decrypt
  95 };