/* Copyright 2003-2006, Voltage Security, all rights reserved.
 */
#include "environment.h"
#include "base.h"
#include "libctx.h"
#include "algobj.h"
#include "keyobj.h"

#ifndef _HMAC_H
#define _HMAC_H

#ifdef __cplusplus
extern "C" {
#endif

/* This is the standard HMAC context.
 * An HMAC object contains a digest object.
 */
typedef struct
{ 
  VoltAlgorithmObject *digestObj;  
  unsigned char *key;
  unsigned int keyLen;   
  unsigned char *ipad;
  unsigned char *opad;  
  unsigned char *ipadHash;
} VoltHMACCtx;

/* Implements VMACInit
*/
int VOLT_CALLING_CONV HMACInit VOLT_PROTO_LIST ((
   VoltAlgorithmObject *obj,
   VoltKeyObject *keyObj  
));

/* Implements VMACUpdate
*/
int VOLT_CALLING_CONV HMACUpdate VOLT_PROTO_LIST ((
    VoltAlgorithmObject *obj,
    unsigned char *data,
    unsigned int dataLen
));

/* Implements VMACFinal
*/
int VOLT_CALLING_CONV HMACFinal VOLT_PROTO_LIST ((
    VoltAlgorithmObject *obj,
    unsigned char *data    
    ));

/* Implements VCtxDestroy.
 */
void VOLT_CALLING_CONV VoltLocalHMACCtxDestroy VOLT_PROTO_LIST ((
   Pointer obj,
   Pointer ctx
));

#ifdef __cplusplus
}
#endif

#endif /* _HMAC_H */