/*
 *  sha1.h
 *
 *  Copyright (C) 1998, 2009
 *  Paul E. Jones <paulej@packetizer.com>
 *  All Rights Reserved
 *
 *****************************************************************************
 *  $Id: sha1.h 12 2009-06-22 19:34:25Z paulej $
 *****************************************************************************
 *
 *  Description:
 *      This class implements the Secure Hashing Standard as defined
 *      in FIPS PUB 180-1 published April 17, 1995.
 *
 *      Many of the variable names in the SHA1Context, especially the
 *      single character names, were used because those were the names
 *      used in the publication.
 *
 *      Please read the file sha1.c for more information.
 *
 */

#ifndef _SHA1_H_
#define _SHA1_H_

typedef unsigned int uint32;
typedef unsigned char byte;

/* 
 *  This structure will hold context information for the hashing
 *  operation
 */
typedef struct SHA1Context {
    uint32 Message_Digest[5]; /* Message Digest (output)          */

    unsigned Length_Low;        /* Message length in bits           */
    unsigned Length_High;       /* Message length in bits           */

    unsigned char Buffer[64]; /* 512-bit message blocks      */
    int Pos;    /* Index into message block array   */
} SHA1Context;

/*
 *  Function Prototypes
 */
void SHA1Reset(SHA1Context *);
void SHA1Input(SHA1Context *, const unsigned char *, unsigned);
void SHA1Finish(SHA1Context *, byte digest[20]);

void ShaHash(const byte *data, int data_size, byte digest[20]);

typedef struct SHA1HmacContext {
  SHA1Context sha1, sha2;
} SHA1HmacContext;


void SHA1HmacReset(SHA1HmacContext *, const unsigned char *, unsigned);
void SHA1HmacInput(SHA1HmacContext *, const unsigned char *, unsigned);
void SHA1HmacFinish(SHA1HmacContext *, byte digest[20]);


#endif
