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sha256.h

/*-
 * Copyright (c) 2001, 2002 Allan Saddi <allan@saddi.com>
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 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.
 *
 *    $Id: sha256.h,v 1.2 2006/11/04 15:25:34 patthoyts Exp $
 */

#ifndef _SHA256_H
#define _SHA256_H

#if HAVE_INTTYPES_H
# include <inttypes.h>
#else
# if HAVE_STDINT_H
#  include <stdint.h>
# endif
#endif

#define SHA256_HASH_SIZE 32

/* Hash size in 32-bit words */
#define SHA256_HASH_WORDS 8

#ifdef _MSC_VER
typedef unsigned __int64    uint64_t;
#else
typedef unsigned long long  uint64_t;
#endif

typedef unsigned int        uint32_t;
typedef unsigned char       uint8_t;

struct _SHA256Context {
  uint64_t totalLength;
  uint32_t hash[SHA256_HASH_WORDS];
  uint32_t bufferLength;
  union {
    uint32_t words[16];
    uint8_t bytes[64];
  } buffer;
};

typedef struct _SHA256Context SHA256Context;
typedef struct _SHA256Context SHA256_CTX;

#ifdef __cplusplus
extern "C" {
#endif

void SHA256Init (SHA256Context *sc);
void SHA256Update (SHA256Context *sc, const void *data, uint32_t len);
void SHA256Final (SHA256Context *sc, uint8_t hash[SHA256_HASH_SIZE]);

void SHA224Init (SHA256Context *sc);

#ifdef __cplusplus
}
#endif

#endif /* !_SHA256_H */

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