src/cipher.c

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