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/*
---------------------------------------------------------------------------
Copyright (c) 2002, Dr Brian Gladman, Worcester, UK. All rights reserved.
LICENSE TERMS
The free distribution and use of this software in both source and binary
form is allowed (with or without changes) provided that:
1. distributions of this source code include the above copyright
notice, this list of conditions and the following disclaimer;
2. distributions in binary form include the above copyright
notice, this list of conditions and the following disclaimer
in the documentation and/or other associated materials;
3. the copyright holder's name is not used to endorse products
built using this software without specific written permission.
ALTERNATIVELY, provided that this notice is retained in full, this product
may be distributed under the terms of the GNU General Public License (GPL),
in which case the provisions of the GPL apply INSTEAD OF those given above.
DISCLAIMER
This software is provided 'as is' with no explicit or implied warranties
in respect of its properties, including, but not limited to, correctness
and/or fitness for purpose.
---------------------------------------------------------------------------
Issue Date: 01/08/2005
*/
#ifndef _SHA2_H
#define _SHA2_H
#include <stdlib.h>
#define SHA_64BIT
/* define the hash functions that you need */
#define SHA_2 /* for dynamic hash length */
#define SHA_224
#define SHA_256
#ifdef SHA_64BIT
# define SHA_384
# define SHA_512
# define NEED_UINT_64T
#endif
#include "brg_types.h"
#if defined(__cplusplus)
extern "C"
{
#endif
/* Note that the following function prototypes are the same */
/* for both the bit and byte oriented implementations. But */
/* the length fields are in bytes or bits as is appropriate */
/* for the version used. Bit sequences are arrays of bytes */
/* in which bit sequence indexes increase from the most to */
/* the least significant end of each byte */
#define SHA224_DIGEST_SIZE 28
#define SHA224_BLOCK_SIZE 64
#define SHA256_DIGEST_SIZE 32
#define SHA256_BLOCK_SIZE 64
/* type to hold the SHA256 (and SHA224) context */
typedef struct
{ uint_32t count[2];
uint_32t hash[8];
uint_32t wbuf[16];
} sha256_ctx;
typedef sha256_ctx sha224_ctx;
VOID_RETURN sha256_compile(sha256_ctx ctx[1]);
VOID_RETURN sha224_begin(sha224_ctx ctx[1]);
#define sha224_hash sha256_hash
VOID_RETURN sha224_end(unsigned char hval[], sha224_ctx ctx[1]);
VOID_RETURN sha224(unsigned char hval[], const unsigned char data[], unsigned long len);
VOID_RETURN sha256_begin(sha256_ctx ctx[1]);
VOID_RETURN sha256_hash(const unsigned char data[], unsigned long len, sha256_ctx ctx[1]);
VOID_RETURN sha256_end(unsigned char hval[], sha256_ctx ctx[1]);
VOID_RETURN sha256(unsigned char hval[], const unsigned char data[], unsigned long len);
#ifndef SHA_64BIT
typedef struct
{ union
{ sha256_ctx ctx256[1];
} uu[1];
uint_32t sha2_len;
} sha2_ctx;
#define SHA2_MAX_DIGEST_SIZE SHA256_DIGEST_SIZE
#else
#define SHA384_DIGEST_SIZE 48
#define SHA384_BLOCK_SIZE 128
#define SHA512_DIGEST_SIZE 64
#define SHA512_BLOCK_SIZE 128
#define SHA2_MAX_DIGEST_SIZE SHA512_DIGEST_SIZE
/* type to hold the SHA384 (and SHA512) context */
typedef struct
{ uint_64t count[2];
uint_64t hash[8];
uint_64t wbuf[16];
} sha512_ctx;
typedef sha512_ctx sha384_ctx;
typedef struct
{ union
{ sha256_ctx ctx256[1];
sha512_ctx ctx512[1];
} uu[1];
uint_32t sha2_len;
} sha2_ctx;
VOID_RETURN sha512_compile(sha512_ctx ctx[1]);
VOID_RETURN sha384_begin(sha384_ctx ctx[1]);
#define sha384_hash sha512_hash
VOID_RETURN sha384_end(unsigned char hval[], sha384_ctx ctx[1]);
VOID_RETURN sha384(unsigned char hval[], const unsigned char data[], unsigned long len);
VOID_RETURN sha512_begin(sha512_ctx ctx[1]);
VOID_RETURN sha512_hash(const unsigned char data[], unsigned long len, sha512_ctx ctx[1]);
VOID_RETURN sha512_end(unsigned char hval[], sha512_ctx ctx[1]);
VOID_RETURN sha512(unsigned char hval[], const unsigned char data[], unsigned long len);
INT_RETURN sha2_begin(unsigned long size, sha2_ctx ctx[1]);
VOID_RETURN sha2_hash(const unsigned char data[], unsigned long len, sha2_ctx ctx[1]);
VOID_RETURN sha2_end(unsigned char hval[], sha2_ctx ctx[1]);
INT_RETURN sha2(unsigned char hval[], unsigned long size, const unsigned char data[], unsigned long len);
#endif
#if defined(__cplusplus)
}
#endif
#endif
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