File: sha.h

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/*
 * sha.h
 *
 * Originally taken from the public domain SHA1 implementation
 * written by by Steve Reid <steve@edmweb.com>
 * 
 * Modified by Aaron D. Gifford <agifford@infowest.com>
 *
 * NO COPYRIGHT - THIS IS 100% IN THE PUBLIC DOMAIN
 *
 * The original unmodified version is available at:
 *    ftp://ftp.funet.fi/pub/crypt/hash/sha/sha1.c
 *
 * 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 __SHA1_H__
#define __SHA1_H__

#ifdef __cplusplus
extern "C" {
#endif

/* Make sure you define these types for your architecture: */
typedef unsigned int sha1_quadbyte;	/* 4 byte type */
typedef unsigned char sha1_byte;	/* single byte type */

/*
 * Be sure to get the above definitions right.  For instance, on my
 * x86 based FreeBSD box, I define LITTLE_ENDIAN and use the type
 * "unsigned long" for the quadbyte.  On FreeBSD on the Alpha, however,
 * while I still use LITTLE_ENDIAN, I must define the quadbyte type
 * as "unsigned int" instead.
 */

#define SHA1_BLOCK_LENGTH	64
#define SHA1_DIGEST_LENGTH	20

/* The SHA1 structure: */
typedef struct _SHA_CTX {
	sha1_quadbyte	state[5];
	sha1_quadbyte	count[2];
	sha1_byte	buffer[SHA1_BLOCK_LENGTH];
} SHA_CTX;

void* SHA1_force_memset(void* s, int v, size_t n);

#ifndef NOPROTO
void SHA1_Init(SHA_CTX *context);
void SHA1_Update(SHA_CTX *context, sha1_byte *data, unsigned int len);
void SHA1_Final(sha1_byte digest[SHA1_DIGEST_LENGTH], SHA_CTX* context);
#else
void SHA1_Init();
void SHA1_Update();
void SHA1_Final();
#endif

#ifdef	__cplusplus
}
#endif

#endif