/* crypto/sha/sha.h */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 * 

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 * 

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 * 

 * 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 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. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from 

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 * 

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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.

 * 

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

#ifndef HEADER_SHA_H

#define HEADER_SHA_H

#include <openssl/e_os2.h>

#ifdef  __cplusplus

extern "C" {

#endif

#if defined(OPENSSL_NO_SHA) || (defined(OPENSSL_NO_SHA0) && defined(OPENSSL_NO_SHA1))

#error SHA is disabled.

#endif

/*

 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 * ! SHA_LONG has to be at least 32 bits wide. If it's wider, then !

 * ! SHA_LONG_LOG2 has to be defined along.                        !

 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 */

#if defined(OPENSSL_SYS_WIN16) || defined(__LP32__)

#define SHA_LONG unsigned long

#elif defined(OPENSSL_SYS_CRAY) || defined(__ILP64__)

#define SHA_LONG unsigned long

#define SHA_LONG_LOG2 3

#else

#define SHA_LONG unsigned int

#endif

#define SHA_LBLOCK	16

#define SHA_CBLOCK	(SHA_LBLOCK*4)	/* SHA treats input data as a

					 * contiguous array of 32 bit

					 * wide big-endian values. */

#define SHA_LAST_BLOCK  (SHA_CBLOCK-8)

#define SHA_DIGEST_LENGTH 20

typedef struct SHAstate_st

	{

	SHA_LONG h0,h1,h2,h3,h4;

	SHA_LONG Nl,Nh;

	SHA_LONG data[SHA_LBLOCK];

	int num;

	} SHA_CTX;

#ifndef OPENSSL_NO_SHA0

int SHA_Init(SHA_CTX *c);

int SHA_Update(SHA_CTX *c, const void *data, unsigned long len);

int SHA_Final(unsigned char *md, SHA_CTX *c);

unsigned char *SHA(const unsigned char *d, unsigned long n,unsigned char *md);

void SHA_Transform(SHA_CTX *c, const unsigned char *data);

#endif

#ifndef OPENSSL_NO_SHA1

int SHA1_Init(SHA_CTX *c);

int SHA1_Update(SHA_CTX *c, const void *data, unsigned long len);

int SHA1_Final(unsigned char *md, SHA_CTX *c);

unsigned char *SHA1(const unsigned char *d, unsigned long n,unsigned char *md);

void SHA1_Transform(SHA_CTX *c, const unsigned char *data);

#endif

#ifdef  __cplusplus

}

#endif

#endif