source4/heimdal/lib/hcrypto/hmac.h

   1 /*
   2  * Copyright (c) 2005 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /* $Id$ */
  35
  36 #ifndef HEIM_HMAC_H
  37 #define HEIM_HMAC_H 1
  38
  39 #include <hcrypto/evp.h>
  40
  41 /* symbol renaming */
  42 #define HMAC_CTX_init hc_HMAC_CTX_init
  43 #define HMAC_CTX_cleanup hc_HMAC_CTX_cleanup
  44 #define HMAC_size hc_HMAC_size
  45 #define HMAC_Init_ex hc_HMAC_Init_ex
  46 #define HMAC_Update hc_HMAC_Update
  47 #define HMAC_Final hc_HMAC_Final
  48 #define HMAC hc_HMAC
  49
  50 /*
  51  *
  52  */
  53
  54 #define HMAC_MAX_MD_CBLOCK      64
  55
  56 typedef struct hc_HMAC_CTX HMAC_CTX;
  57
  58 struct hc_HMAC_CTX {
  59     const EVP_MD *md;
  60     ENGINE *engine;
  61     EVP_MD_CTX *ctx;
  62     size_t key_length;
  63     void *opad;
  64     void *ipad;
  65     void *buf;
  66 };
  67
  68
  69 void    HMAC_CTX_init(HMAC_CTX *);
  70 void    HMAC_CTX_cleanup(HMAC_CTX *ctx);
  71
  72 size_t  HMAC_size(const HMAC_CTX *ctx);
  73
  74 void    HMAC_Init_ex(HMAC_CTX *, const void *, size_t,
  75                      const EVP_MD *, ENGINE *);
  76 void    HMAC_Update(HMAC_CTX *ctx, const void *data, size_t len);
  77 void    HMAC_Final(HMAC_CTX *ctx, void *md, unsigned int *len);
  78
  79 void *  HMAC(const EVP_MD *evp_md, const void *key, size_t key_len,
  80              const void *data, size_t n, void *md, unsigned int *md_len);
  81
  82 #endif /* HEIM_HMAC_H */