text: /*-
   * HMAC-SHA-224/256/384/512 implementation
   * Last update: 06/15/2005
   * Issue date:  06/15/2005
   *
   * Copyright (C) 2005 Olivier Gay <olivier.gay@a3.epfl.ch>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the project nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #ifndef _HMAC_SHA2_H
  #define _HMAC_SHA2_H
  
  #include "sha2.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  typedef struct {
      sha224_ctx ctx_inside;
      sha224_ctx ctx_outside;
  
      /* for hmac_reinit */
      sha224_ctx ctx_inside_reinit;
      sha224_ctx ctx_outside_reinit;
  
      unsigned char block_ipad[SHA224_BLOCK_SIZE];
      unsigned char block_opad[SHA224_BLOCK_SIZE];
  } hmac_sha224_ctx;
  
  typedef struct {
      sha256_ctx ctx_inside;
      sha256_ctx ctx_outside;
  
      /* for hmac_reinit */
      sha256_ctx ctx_inside_reinit;
      sha256_ctx ctx_outside_reinit;
  
      unsigned char block_ipad[SHA256_BLOCK_SIZE];
      unsigned char block_opad[SHA256_BLOCK_SIZE];
  } hmac_sha256_ctx;
  
  typedef struct {
      sha384_ctx ctx_inside;
      sha384_ctx ctx_outside;
  
      /* for hmac_reinit */
      sha384_ctx ctx_inside_reinit;
      sha384_ctx ctx_outside_reinit;
  
      unsigned char block_ipad[SHA384_BLOCK_SIZE];
      unsigned char block_opad[SHA384_BLOCK_SIZE];
  } hmac_sha384_ctx;
  
  typedef struct {
      sha512_ctx ctx_inside;
      sha512_ctx ctx_outside;
  
      /* for hmac_reinit */
      sha512_ctx ctx_inside_reinit;
      sha512_ctx ctx_outside_reinit;
  
      unsigned char block_ipad[SHA512_BLOCK_SIZE];
      unsigned char block_opad[SHA512_BLOCK_SIZE];
  } hmac_sha512_ctx;
  
  void hmac_sha224_init(hmac_sha224_ctx *ctx, unsigned char *key,
                        unsigned int key_size);
  void hmac_sha224_reinit(hmac_sha224_ctx *ctx);
  void hmac_sha224_update(hmac_sha224_ctx *ctx, unsigned char *message,
                          unsigned int message_len);
  void hmac_sha224_final(hmac_sha224_ctx *ctx, unsigned char *mac,
                         unsigned int mac_size);
  void hmac_sha224(unsigned char *key, unsigned int key_size,
                   unsigned char *message, unsigned int message_len,
                   unsigned char *mac, unsigned mac_size);
  
  void hmac_sha256_init(hmac_sha256_ctx *ctx, unsigned char *key,
                        unsigned int key_size);
  void hmac_sha256_reinit(hmac_sha256_ctx *ctx);
  void hmac_sha256_update(hmac_sha256_ctx *ctx, unsigned char *message,
                          unsigned int message_len);
  void hmac_sha256_final(hmac_sha256_ctx *ctx, unsigned char *mac,
                         unsigned int mac_size);
  void hmac_sha256(unsigned char *key, unsigned int key_size,
                   unsigned char *message, unsigned int message_len,
                   unsigned char *mac, unsigned mac_size);
  
  void hmac_sha384_init(hmac_sha384_ctx *ctx, unsigned char *key,
                        unsigned int key_size);
  void hmac_sha384_reinit(hmac_sha384_ctx *ctx);
  void hmac_sha384_update(hmac_sha384_ctx *ctx, unsigned char *message,
                          unsigned int message_len);
  void hmac_sha384_final(hmac_sha384_ctx *ctx, unsigned char *mac,
                         unsigned int mac_size);
  void hmac_sha384(unsigned char *key, unsigned int key_size,
                   unsigned char *message, unsigned int message_len,
                   unsigned char *mac, unsigned mac_size);
  
  void hmac_sha512_init(hmac_sha512_ctx *ctx, unsigned char *key,
                        unsigned int key_size);
  void hmac_sha512_reinit(hmac_sha512_ctx *ctx);
  void hmac_sha512_update(hmac_sha512_ctx *ctx, unsigned char *message,
                          unsigned int message_len);
  void hmac_sha512_final(hmac_sha512_ctx *ctx, unsigned char *mac,
                         unsigned int mac_size);
  void hmac_sha512(unsigned char *key, unsigned int key_size,
                   unsigned char *message, unsigned int message_len,
                   unsigned char *mac, unsigned mac_size);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* ! _HMAC_SHA2_H */
  
  