src/cipher.c

   1 /*
   2     Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
   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 #include <gcrypt.h>
  21 #include "cipher.h"
  22
  23 unsigned
  24 gcrypt_to_cipher (int n)
  25 {
  26   if (n == GCRY_CIPHER_AES128)
  27     return PWMD_CIPHER_AES128;
  28   else if (n == GCRY_CIPHER_AES192)
  29     return PWMD_CIPHER_AES192;
  30   else if (n == GCRY_CIPHER_AES256)
  31     return PWMD_CIPHER_AES256;
  32   else if (n == GCRY_CIPHER_SERPENT128)
  33     return PWMD_CIPHER_SERPENT128;
  34   else if (n == GCRY_CIPHER_SERPENT192)
  35     return PWMD_CIPHER_SERPENT192;
  36   else if (n == GCRY_CIPHER_SERPENT256)
  37     return PWMD_CIPHER_SERPENT256;
  38   else if (n == GCRY_CIPHER_CAMELLIA128)
  39     return PWMD_CIPHER_CAMELLIA128;
  40   else if (n == GCRY_CIPHER_CAMELLIA192)
  41     return PWMD_CIPHER_CAMELLIA192;
  42   else if (n == GCRY_CIPHER_CAMELLIA256)
  43     return PWMD_CIPHER_CAMELLIA256;
  44   else if (n == GCRY_CIPHER_BLOWFISH)
  45     return PWMD_CIPHER_BLOWFISH;
  46   else if (n == GCRY_CIPHER_3DES)
  47     return PWMD_CIPHER_3DES;
  48   else if (n == GCRY_CIPHER_CAST5)
  49     return PWMD_CIPHER_CAST5;
  50   else if (n == GCRY_CIPHER_TWOFISH)
  51     return PWMD_CIPHER_TWOFISH;
  52   else if (n == GCRY_CIPHER_TWOFISH128)
  53     return PWMD_CIPHER_TWOFISH128;
  54
  55   return PWMD_CIPHER_AES256;
  56 }
  57
  58 int
  59 cipher_to_gcrypt (int flags)
  60 {
  61   if (flags < 0)
  62     return flags;
  63
  64   if (flags & PWMD_CIPHER_AES128)
  65     return GCRY_CIPHER_AES128;
  66   else if (flags & PWMD_CIPHER_AES192)
  67     return GCRY_CIPHER_AES192;
  68   else if (flags & PWMD_CIPHER_AES256)
  69     return GCRY_CIPHER_AES256;
  70   else if (flags & PWMD_CIPHER_SERPENT128)
  71     return GCRY_CIPHER_SERPENT128;
  72   else if (flags & PWMD_CIPHER_SERPENT192)
  73     return GCRY_CIPHER_SERPENT192;
  74   else if (flags & PWMD_CIPHER_SERPENT256)
  75     return GCRY_CIPHER_SERPENT256;
  76   else if (flags & PWMD_CIPHER_CAMELLIA128)
  77     return GCRY_CIPHER_CAMELLIA128;
  78   else if (flags & PWMD_CIPHER_CAMELLIA192)
  79     return GCRY_CIPHER_CAMELLIA192;
  80   else if (flags & PWMD_CIPHER_CAMELLIA256)
  81     return GCRY_CIPHER_CAMELLIA256;
  82   else if (flags & PWMD_CIPHER_BLOWFISH)
  83     return GCRY_CIPHER_BLOWFISH;
  84   else if (flags & PWMD_CIPHER_3DES)
  85     return GCRY_CIPHER_3DES;
  86   else if (flags & PWMD_CIPHER_CAST5)
  87     return GCRY_CIPHER_CAST5;
  88   else if (flags & PWMD_CIPHER_TWOFISH)
  89     return GCRY_CIPHER_TWOFISH;
  90   else if (flags & PWMD_CIPHER_TWOFISH128)
  91     return GCRY_CIPHER_TWOFISH128;
  92
  93   return -1;
  94 }
  95
  96 int
  97 cipher_string_to_cipher (const char *str)
  98 {
  99   int flags = 0;
 100
 101   if (!strcasecmp (str, "aes128"))
 102     flags = PWMD_CIPHER_AES128;
 103   else if (!strcasecmp (str, "aes192"))
 104     flags = PWMD_CIPHER_AES192;
 105   else if (!strcasecmp (str, "aes256"))
 106     flags = PWMD_CIPHER_AES256;
 107   else if (!strcasecmp (str, "serpent128"))
 108     flags = PWMD_CIPHER_SERPENT128;
 109   else if (!strcasecmp (str, "serpent192"))
 110     flags = PWMD_CIPHER_SERPENT192;
 111   else if (!strcasecmp (str, "serpent256"))
 112     flags = PWMD_CIPHER_SERPENT256;
 113   else if (!strcasecmp (str, "camellia128"))
 114     flags = PWMD_CIPHER_CAMELLIA128;
 115   else if (!strcasecmp (str, "camellia192"))
 116     flags = PWMD_CIPHER_CAMELLIA192;
 117   else if (!strcasecmp (str, "camellia256"))
 118     flags = PWMD_CIPHER_CAMELLIA256;
 119   else if (!strcasecmp (str, "blowfish"))
 120     flags = PWMD_CIPHER_BLOWFISH;
 121   else if (!strcasecmp (str, "cast5"))
 122     flags = PWMD_CIPHER_CAST5;
 123   else if (!strcasecmp (str, "3des"))
 124     flags = PWMD_CIPHER_3DES;
 125   else if (!strcasecmp (str, "twofish256"))
 126     flags = PWMD_CIPHER_TWOFISH;
 127   else if (!strcasecmp (str, "twofish128"))
 128     flags = PWMD_CIPHER_TWOFISH128;
 129   else
 130     return -1;
 131
 132   return flags;
 133 }
 134
 135 int
 136 cipher_string_to_gcrypt (const char *str)
 137 {
 138   return cipher_to_gcrypt (cipher_string_to_cipher (str));
 139 }
 140
 141 uint64_t
 142 set_cipher_flag (uint64_t flags, int algo)
 143 {
 144   // Clear all previous cipher bits but keep the flags.
 145   flags &= ~((uint16_t) ((uint32_t) (flags & 0xFFFFFFFF)));
 146   flags |= gcrypt_to_cipher (algo);
 147   return flags;
 148 }