programs/charon/lib/crypto/prfs/prf.c

   1 /**
   2  * @file prf.c
   3  *
   4  * @brief Generic constructor for all prf_t
   5  *
   6  */
   7
   8 /*
   9  * Copyright (C) 2005 Jan Hutter, Martin Willi
  10  * Hochschule fuer Technik Rapperswil
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License as published by the
  14  * Free Software Foundation; either version 2 of the License, or (at your
  15  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  19  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  20  * for more details.
  21  */
  22
  23
  24 #include "prf.h"
  25
  26 #include <crypto/hashers/hasher.h>
  27 #include <crypto/prfs/hmac_prf.h>
  28
  29
  30 /**
  31  * String mappings for encryption_algorithm_t.
  32  */
  33 mapping_t pseudo_random_function_m[] = {
  34 {PRF_UNDEFINED, "PRF_UNDEFINED"},
  35 {PRF_HMAC_MD5, "PRF_HMAC_MD5"},
  36 {PRF_HMAC_SHA1, "PRF_HMAC_SHA1"},
  37 {PRF_HMAC_TIGER, "PRF_HMAC_TIGER"},
  38 {PRF_AES128_CBC, "PRF_AES128_CBC"},
  39 {MAPPING_END, NULL}
  40 };
  41
  42 /*
  43  * Described in header.
  44  */
  45 prf_t *prf_create(pseudo_random_function_t pseudo_random_function)
  46 {
  47         switch (pseudo_random_function)
  48         {
  49                 case PRF_HMAC_SHA1:
  50                 {
  51                         return (prf_t*)hmac_prf_create(HASH_SHA1);
  52                 }
  53                 case PRF_HMAC_MD5:
  54                 {
  55                         return (prf_t*)hmac_prf_create(HASH_MD5);
  56                 }
  57                 case PRF_HMAC_TIGER:
  58                 case PRF_AES128_CBC:
  59                 default:
  60                         return NULL;
  61         }
  62 }
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