/* Copyright 2003-2006, Voltage Security, all rights reserved.
 */

#include "vibecrypto.h"
#include "environment.h"
#include "base.h"
#include "libctx.h"
#include "algobj.h"
#include "keyobj.h"

#ifndef _OFB_H
#define _OFB_H

#ifdef __cplusplus
extern "C" {
#endif

/* Implements VEncryptInit.
 */
int VOLT_CALLING_CONV OFBEncryptInit VOLT_PROTO_LIST ((
   VoltAlgorithmObject *algObj,
   VoltKeyObject *keyObj
));

/* Implements VEncryptUpdate.
 */
int VOLT_CALLING_CONV OFBEncryptUpdate VOLT_PROTO_LIST ((
   VoltAlgorithmObject *algObj,
   VtRandomObject random,
   unsigned char *dataToEncrypt,
   unsigned int dataToEncryptLen,
   unsigned char *encryptedData
));

/* Implments VDecryptInit.
 */
int VOLT_CALLING_CONV OFBDecryptInit VOLT_PROTO_LIST ((
   VoltAlgorithmObject *algObj,
   VoltKeyObject *keyObj
));

/* The feedCtx for OFB looks like this.
 */
typedef struct
{
  VoltFeedbackCtx feedCtx;
  unsigned int xorUsed;
  VEncryptInit AlgEncryptInit;
  VEncryptUpdate AlgEncryptUpdate;
} VoltOFBCtx;

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

#ifdef __cplusplus
}
#endif

#endif /* _OFB_H */