/* 
 * Cryptographic API.
 *
 * DES & Triple DES EDE Cipher Algorithms.
 *
 * Originally released as descore by Dana L. How <how@isl.stanford.edu>.
 * Modified by Raimar Falke <rf13@inf.tu-dresden.de> for the Linux-Kernel.
 * Derived from Cryptoapi and Nettle implementations, adapted for in-place
 * scatterlist interface.  Changed LGPL to GPL per section 3 of the LGPL.
 *
 * Copyright (c) 1992 Dana L. How.
 * Copyright (c) Raimar Falke <rf13@inf.tu-dresden.de> 
 * Copyright (c) Gisle Sælensminde <gisle@ii.uib.no>
 * Copyright (C) 2001 Niels Möller.
 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */
#ifndef _DES_
#define _DES_

#include "uint.h"

#define DES_KEY_SIZE		8
#define DES_EXPKEY_WORDS	32
#define DES_BLOCK_SIZE		8

#define DES3_EDE_KEY_SIZE	(3 * DES_KEY_SIZE)
#define DES3_EDE_EXPKEY_WORDS	(3 * DES_EXPKEY_WORDS)
#define DES3_EDE_BLOCK_SIZE	DES_BLOCK_SIZE

#define CRYPTO_TFM_REQ_WEAK_KEY		0x00000100
#define CRYPTO_TFM_RES_WEAK_KEY		0x00100000
#define CRYPTO_TFM_RES_BAD_KEY_SCHED 	0x00400000

struct des_ctx {
	u8 iv[DES_BLOCK_SIZE];
	u32 expkey[DES_EXPKEY_WORDS];
};

struct des3_ede_ctx {
	u8 iv[DES_BLOCK_SIZE];
	u32 expkey[DES3_EDE_EXPKEY_WORDS];
};

int des_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags);

void des_encrypt(void *ctx, u8 *dst, const u8 *src);

void des_decrypt(void *ctx, u8 *dst, const u8 *src);


int des3_ede_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags);

void des3_ede_encrypt(void *ctx, u8 *dst, const u8 *src);

void des3_ede_decrypt(void *ctx, u8 *dst, const u8 *src);

#endif