des.h - mozsearch

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/*

 *  des.h

 *  header file for DES-150 library

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef _DES_H_

#define _DES_H_ 1

#include "blapi.h"

typedef unsigned char BYTE;

typedef unsigned int HALF;

#define HALFPTR(x) ((HALF *)(x))

#define SHORTPTR(x) ((unsigned short *)(x))

#define BYTEPTR(x) ((BYTE *)(x))

typedef enum {

    DES_ENCRYPT = 0x5555,

    DES_DECRYPT = 0xAAAA

} DESDirection;

typedef void DESFunc(struct DESContextStr *cx, BYTE *out, const BYTE *in,

                     unsigned int len);

struct DESContextStr {

    /* key schedule, 16 internal keys, each with 8 6-bit parts */

    HALF ks0[32];

    HALF ks1[32];

    HALF ks2[32];

    HALF iv[2];

    DESDirection direction;

    DESFunc *worker;

};

void DES_MakeSchedule(HALF *ks, const BYTE *key, DESDirection direction);

void DES_Do1Block(HALF *ks, const BYTE *inbuf, BYTE *outbuf);

#endif