src/libstrongswan/crypto/hashers/hasher.c

   1 /*
   2  * Copyright (C) 2005 Jan Hutter
   3  * Copyright (C) 2005-2006 Martin Willi
   4  *
   5  * Hochschule fuer Technik Rapperswil
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2 of the License, or (at your
  10  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  * for more details.
  16  */
  17
  18 #include "hasher.h"
  19
  20 #include <asn1/oid.h>
  21
  22 ENUM(hash_algorithm_names, HASH_UNKNOWN, HASH_MD4,
  23         "HASH_UNKNOWN",
  24         "HASH_PREFERRED",
  25         "HASH_MD2",
  26         "HASH_MD5",
  27         "HASH_SHA1",
  28         "HASH_SHA256",
  29         "HASH_SHA384",
  30         "HASH_SHA512",
  31         "HASH_MD4"
  32 );
  33
  34 /*
  35  * Described in header.
  36  */
  37 hash_algorithm_t hasher_algorithm_from_oid(int oid)
  38 {
  39         switch (oid)
  40         {
  41                 case OID_MD2:
  42                 case OID_MD2_WITH_RSA:
  43                         return HASH_MD2;
  44                 case OID_MD5:
  45                 case OID_MD5_WITH_RSA:
  46                         return HASH_MD5;
  47                 case OID_SHA1:
  48                 case OID_SHA1_WITH_RSA:
  49                         return HASH_SHA1;
  50                 case OID_SHA256:
  51                 case OID_SHA256_WITH_RSA:
  52                         return HASH_SHA256;
  53                 case OID_SHA384:
  54                 case OID_SHA384_WITH_RSA:
  55                         return HASH_SHA384;
  56                 case OID_SHA512:
  57                 case OID_SHA512_WITH_RSA:
  58                         return HASH_SHA512;
  59                 default:
  60                         return HASH_UNKNOWN;
  61         }
  62 }
  63
  64 /*
  65  * Described in header.
  66  */
  67 int hasher_algorithm_to_oid(hash_algorithm_t alg)
  68 {
  69         int oid;
  70
  71         switch (alg)
  72         {
  73                 case HASH_MD2:
  74                         oid = OID_MD2;
  75                         break;
  76                 case HASH_MD5:
  77                         oid = OID_MD5;
  78                         break;
  79                 case HASH_SHA1:
  80                         oid = OID_SHA1;
  81                         break;
  82                 case HASH_SHA256:
  83                         oid = OID_SHA256;
  84                         break;
  85                 case HASH_SHA384:
  86                         oid = OID_SHA384;
  87                         break;
  88                 case HASH_SHA512:
  89                         oid = OID_SHA512;
  90                         break;
  91                 default:
  92                         oid = OID_UNKNOWN;
  93         }
  94         return oid;
  95 }
  96
  97 /*
  98  * Described in header.
  99  */
 100 int hasher_signature_algorithm_to_oid(hash_algorithm_t alg)
 101 {
 102         int oid;
 103
 104         switch (alg)
 105         {
 106                 case HASH_MD2:
 107                         oid = OID_MD2_WITH_RSA;
 108                         break;
 109                 case HASH_MD5:
 110                         oid = OID_MD5_WITH_RSA;
 111                         break;
 112                 case HASH_SHA1:
 113                         oid = OID_SHA1_WITH_RSA;
 114                         break;
 115                 case HASH_SHA256:
 116                         oid = OID_SHA256_WITH_RSA;
 117                         break;
 118                 case HASH_SHA384:
 119                         oid = OID_SHA384_WITH_RSA;
 120                         break;
 121                 case HASH_SHA512:
 122                         oid = OID_SHA512_WITH_RSA;
 123                         break;
 124                 default:
 125                         oid = OID_UNKNOWN;
 126         }
 127         return oid;
 128 }
 129