michael@0: /*
michael@0:  *  des.h
michael@0:  *
michael@0:  *  header file for DES-150 library
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef _DES_H_
michael@0: #define _DES_H_ 1
michael@0: 
michael@0: #include "blapi.h"
michael@0: 
michael@0: typedef unsigned char BYTE;
michael@0: typedef unsigned int  HALF;
michael@0: 
michael@0: #define HALFPTR(x) ((HALF *)(x))
michael@0: #define SHORTPTR(x) ((unsigned short *)(x))
michael@0: #define BYTEPTR(x) ((BYTE *)(x))
michael@0: 
michael@0: typedef enum {
michael@0:     DES_ENCRYPT = 0x5555,
michael@0:     DES_DECRYPT = 0xAAAA
michael@0: } DESDirection;
michael@0: 
michael@0: typedef void DESFunc(struct DESContextStr *cx, BYTE *out, const BYTE *in, 
michael@0:                      unsigned int len);
michael@0: 
michael@0: struct DESContextStr {
michael@0:     /* key schedule, 16 internal keys, each with 8 6-bit parts */
michael@0:     HALF ks0 [32];
michael@0:     HALF ks1 [32];
michael@0:     HALF ks2 [32];
michael@0:     HALF iv  [2];
michael@0:     DESDirection direction;
michael@0:     DESFunc  *worker;
michael@0: };
michael@0: 
michael@0: void DES_MakeSchedule( HALF * ks, const BYTE * key,   DESDirection direction);
michael@0: void DES_Do1Block(     HALF * ks, const BYTE * inbuf, BYTE * outbuf);
michael@0: 
michael@0: #endif