src/cipher.c

   1 /*
   2     Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014
   3     Ben Kibbey <bjk@luxsci.net>
   4
   5     This file is part of pwmd.
   6
   7     Pwmd is free software: you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation, either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     Pwmd is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with Pwmd.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <gcrypt.h>
  25 #include <string.h>
  26
  27 #ifdef HAVE_STRINGS_H
  28 #include <strings.h>
  29 #endif
  30
  31 #include "cipher.h"
  32
  33 unsigned
  34 gcrypt_to_cipher (int n)
  35 {
  36   if (n == GCRY_CIPHER_AES128)
  37     return PWMD_CIPHER_AES128;
  38   else if (n == GCRY_CIPHER_AES192)
  39     return PWMD_CIPHER_AES192;
  40   else if (n == GCRY_CIPHER_AES256)
  41     return PWMD_CIPHER_AES256;
  42   else if (n == GCRY_CIPHER_SERPENT128)
  43     return PWMD_CIPHER_SERPENT128;
  44   else if (n == GCRY_CIPHER_SERPENT192)
  45     return PWMD_CIPHER_SERPENT192;
  46   else if (n == GCRY_CIPHER_SERPENT256)
  47     return PWMD_CIPHER_SERPENT256;
  48   else if (n == GCRY_CIPHER_CAMELLIA128)
  49     return PWMD_CIPHER_CAMELLIA128;
  50   else if (n == GCRY_CIPHER_CAMELLIA192)
  51     return PWMD_CIPHER_CAMELLIA192;
  52   else if (n == GCRY_CIPHER_CAMELLIA256)
  53     return PWMD_CIPHER_CAMELLIA256;
  54   else if (n == GCRY_CIPHER_BLOWFISH)
  55     return PWMD_CIPHER_BLOWFISH;
  56   else if (n == GCRY_CIPHER_3DES)
  57     return PWMD_CIPHER_3DES;
  58   else if (n == GCRY_CIPHER_CAST5)
  59     return PWMD_CIPHER_CAST5;
  60   else if (n == GCRY_CIPHER_TWOFISH)
  61     return PWMD_CIPHER_TWOFISH;
  62   else if (n == GCRY_CIPHER_TWOFISH128)
  63     return PWMD_CIPHER_TWOFISH128;
  64
  65   return PWMD_CIPHER_AES256;
  66 }
  67
  68 int
  69 cipher_to_gcrypt (int flags)
  70 {
  71   if (flags < 0)
  72     return flags;
  73
  74   if (flags & PWMD_CIPHER_AES128)
  75     return GCRY_CIPHER_AES128;
  76   else if (flags & PWMD_CIPHER_AES192)
  77     return GCRY_CIPHER_AES192;
  78   else if (flags & PWMD_CIPHER_AES256)
  79     return GCRY_CIPHER_AES256;
  80   else if (flags & PWMD_CIPHER_SERPENT128)
  81     return GCRY_CIPHER_SERPENT128;
  82   else if (flags & PWMD_CIPHER_SERPENT192)
  83     return GCRY_CIPHER_SERPENT192;
  84   else if (flags & PWMD_CIPHER_SERPENT256)
  85     return GCRY_CIPHER_SERPENT256;
  86   else if (flags & PWMD_CIPHER_CAMELLIA128)
  87     return GCRY_CIPHER_CAMELLIA128;
  88   else if (flags & PWMD_CIPHER_CAMELLIA192)
  89     return GCRY_CIPHER_CAMELLIA192;
  90   else if (flags & PWMD_CIPHER_CAMELLIA256)
  91     return GCRY_CIPHER_CAMELLIA256;
  92   else if (flags & PWMD_CIPHER_BLOWFISH)
  93     return GCRY_CIPHER_BLOWFISH;
  94   else if (flags & PWMD_CIPHER_3DES)
  95     return GCRY_CIPHER_3DES;
  96   else if (flags & PWMD_CIPHER_CAST5)
  97     return GCRY_CIPHER_CAST5;
  98   else if (flags & PWMD_CIPHER_TWOFISH)
  99     return GCRY_CIPHER_TWOFISH;
 100   else if (flags & PWMD_CIPHER_TWOFISH128)
 101     return GCRY_CIPHER_TWOFISH128;
 102
 103   return -1;
 104 }
 105
 106 int
 107 cipher_string_to_cipher (const char *str)
 108 {
 109   int flags = 0;
 110
 111   if (!strcasecmp (str, "aes128"))
 112     flags = PWMD_CIPHER_AES128;
 113   else if (!strcasecmp (str, "aes192"))
 114     flags = PWMD_CIPHER_AES192;
 115   else if (!strcasecmp (str, "aes256"))
 116     flags = PWMD_CIPHER_AES256;
 117   else if (!strcasecmp (str, "serpent128"))
 118     flags = PWMD_CIPHER_SERPENT128;
 119   else if (!strcasecmp (str, "serpent192"))
 120     flags = PWMD_CIPHER_SERPENT192;
 121   else if (!strcasecmp (str, "serpent256"))
 122     flags = PWMD_CIPHER_SERPENT256;
 123   else if (!strcasecmp (str, "camellia128"))
 124     flags = PWMD_CIPHER_CAMELLIA128;
 125   else if (!strcasecmp (str, "camellia192"))
 126     flags = PWMD_CIPHER_CAMELLIA192;
 127   else if (!strcasecmp (str, "camellia256"))
 128     flags = PWMD_CIPHER_CAMELLIA256;
 129   else if (!strcasecmp (str, "blowfish"))
 130     flags = PWMD_CIPHER_BLOWFISH;
 131   else if (!strcasecmp (str, "cast5"))
 132     flags = PWMD_CIPHER_CAST5;
 133   else if (!strcasecmp (str, "3des"))
 134     flags = PWMD_CIPHER_3DES;
 135   else if (!strcasecmp (str, "twofish256"))
 136     flags = PWMD_CIPHER_TWOFISH;
 137   else if (!strcasecmp (str, "twofish128"))
 138     flags = PWMD_CIPHER_TWOFISH128;
 139   else
 140     return -1;
 141
 142   return flags;
 143 }
 144
 145 int
 146 cipher_string_to_gcrypt (const char *str)
 147 {
 148   return cipher_to_gcrypt (cipher_string_to_cipher (str));
 149 }
 150
 151 uint64_t
 152 set_cipher_flag (uint64_t flags, int algo)
 153 {
 154   // Clear all previous cipher bits but keep the flags.
 155   flags &= ~((uint16_t) ((uint32_t) (flags & 0xFFFFFFFF)));
 156   flags |= gcrypt_to_cipher (algo);
 157   return flags;
 158 }