/*
* hmac_sha256.h
*
* Version 1.0.0
*
* Written by Aaron D. Gifford <me@aarongifford.com>
*
* Copyright 1998, 2000 Aaron D. Gifford. 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 copyright holder nor the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) 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 AUTHOR(S) 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 HEADER_HMAC_SHA256_H
#define HEADER_HMAC_SHA256_H
#include "sha2.h"
#ifdef __cplusplus
extern "C" {
#endif
#define HMAC_SHA256_DIGEST_LENGTH 32
#define HMAC_SHA256_BLOCK_LENGTH 64
/* The HMAC_SHA1 structure: */
typedef struct _HMAC_SHA256_CTX {
unsigned char ipad[HMAC_SHA256_BLOCK_LENGTH];
unsigned char opad[HMAC_SHA256_BLOCK_LENGTH];
SHA256_CTX shactx;
unsigned char key[HMAC_SHA256_BLOCK_LENGTH];
unsigned int keylen;
unsigned int hashkey;
} HMAC_SHA256_CTX;
#ifndef NOPROTO
void HMAC_SHA256_Init(HMAC_SHA256_CTX *ctx);
void HMAC_SHA256_UpdateKey(HMAC_SHA256_CTX *ctx, unsigned char *key, unsigned int keylen);
void HMAC_SHA256_EndKey(HMAC_SHA256_CTX *ctx);
void HMAC_SHA256_StartMessage(HMAC_SHA256_CTX *ctx);
void HMAC_SHA256_UpdateMessage(HMAC_SHA256_CTX *ctx, unsigned char *data, unsigned int datalen);
void HMAC_SHA256_EndMessage(unsigned char *out, HMAC_SHA256_CTX *ctx);
void HMAC_SHA256_Done(HMAC_SHA256_CTX *ctx);
#else
void HMAC_SHA256_Init();
void HMAC_SHA256_UpdateKey();
void HMAC_SHA256_EndKey();
void HMAC_SHA256_StartMessage();
void HMAC_SHA256_UpdateMessage();
void HMAC_SHA256_EndMessage();
void HMAC_SHA256_Done();
#endif
#ifdef __cplusplus
}
#endif
#endif
