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  * $Id$
  18  */
  19
  20 #include "hasher.h"
  21
  22 #include <asn1/oid.h>
  23
  24 ENUM(hash_algorithm_names, HASH_UNKNOWN, HASH_MD4,
  25         "HASH_UNKNOWN",
  26         "HASH_PREFERRED",
  27         "HASH_MD2",
  28         "HASH_MD5",
  29         "HASH_SHA1",
  30         "HASH_SHA256",
  31         "HASH_SHA384",
  32         "HASH_SHA512",
  33         "HASH_MD4"
  34 );
  35
  36 /*
  37  * Described in header.
  38  */
  39 hash_algorithm_t hasher_algorithm_from_oid(int oid)
  40 {
  41         switch (oid)
  42         {
  43                 case OID_MD2:
  44                 case OID_MD2_WITH_RSA:
  45                         return HASH_MD2;
  46                 case OID_MD5:
  47                 case OID_MD5_WITH_RSA:
  48                         return HASH_MD5;
  49                 case OID_SHA1:
  50                 case OID_SHA1_WITH_RSA:
  51                         return HASH_SHA1;
  52                 case OID_SHA256:
  53                 case OID_SHA256_WITH_RSA:
  54                         return HASH_SHA256;
  55                 case OID_SHA384:
  56                 case OID_SHA384_WITH_RSA:
  57                         return HASH_SHA384;
  58                 case OID_SHA512:
  59                 case OID_SHA512_WITH_RSA:
  60                         return HASH_SHA512;
  61                 default:
  62                         return HASH_UNKNOWN;
  63         }
  64 }
  65
  66 /*
  67  * Described in header.
  68  */
  69 int hasher_algorithm_to_oid(hash_algorithm_t alg)
  70 {
  71         int oid;
  72
  73         switch (alg)
  74         {
  75                 case HASH_MD2:
  76                         oid = OID_MD2;
  77                         break;
  78                 case HASH_MD5:
  79                         oid = OID_MD5;
  80                         break;
  81                 case HASH_SHA1:
  82                         oid = OID_SHA1;
  83                         break;
  84                 case HASH_SHA256:
  85                         oid = OID_SHA256;
  86                         break;
  87                 case HASH_SHA384:
  88                         oid = OID_SHA384;
  89                         break;
  90                 case HASH_SHA512:
  91                         oid = OID_SHA512;
  92                         break;
  93                 default:
  94                         oid = OID_UNKNOWN;
  95         }
  96         return oid;
  97 }
  98
  99 /*
 100  * Described in header.
 101  */
 102 int hasher_signature_algorithm_to_oid(hash_algorithm_t alg)
 103 {
 104         int oid;
 105
 106         switch (alg)
 107         {
 108                 case HASH_MD2:
 109                         oid = OID_MD2_WITH_RSA;
 110                         break;
 111                 case HASH_MD5:
 112                         oid = OID_MD5_WITH_RSA;
 113                         break;
 114                 case HASH_SHA1:
 115                         oid = OID_SHA1_WITH_RSA;
 116                         break;
 117                 case HASH_SHA256:
 118                         oid = OID_SHA256_WITH_RSA;
 119                         break;
 120                 case HASH_SHA384:
 121                         oid = OID_SHA384_WITH_RSA;
 122                         break;
 123                 case HASH_SHA512:
 124                         oid = OID_SHA512_WITH_RSA;
 125                         break;
 126                 default:
 127                         oid = OID_UNKNOWN;
 128         }
 129         return oid;
 130 }
 131