path: root/crypto/des_generic.c

/*
 * Cryptographic API.
 *
 * DES & Triple DES EDE Cipher Algorithms.
 *
 * Copyright (c) 2005 Dag Arne Osvik <da@osvik.no>
 *
 * 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.
 *
 */

#include <asm/byteorder.h>
#include <linux/bitops.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/crypto.h>
#include <linux/types.h>

#include <crypto/des.h>

#define ROL(x, r) ((x) = rol32((x), (r)))
#define ROR(x, r) ((x) = ror32((x), (r)))

struct des_ctx {
	u32 expkey[DES_EXPKEY_WORDS];
};

struct des3_ede_ctx {
	u32 expkey[DES3_EDE_EXPKEY_WORDS];
};

/* Lookup tables for key expansion */

static const u8 pc1[256] = {
	0x00, 0x00, 0x40, 0x04, 0x10, 0x10, 0x50, 0x14,
	0x04, 0x40, 0x44, 0x44, 0x14, 0x50, 0x54, 0x54,
	0x02, 0x02, 0x42, 0x06, 0x12, 0x12, 0x52, 0x16,
	0x06, 0x42, 0x46, 0x46, 0x16, 0x52, 0x56, 0x56,
	0x80, 0x08, 0xc0, 0x0c, 0x90, 0x18, 0xd0, 0x1c,
	0x84, 0x48, 0xc4, 0x4c, 0x94, 0x58, 0xd4, 0x5c,
	0x82, 0x0a, 0xc2, 0x0e, 0x92, 0x1a, 0xd2, 0x1e,
	0x86, 0x4a, 0xc6, 0x4e, 0x96, 0x5a, 0xd6, 0x5e,
	0x20, 0x20, 0x60, 0x24, 0x30, 0x30, 0x70, 0x34,
	0x24, 0x60, 0x64, 0x64, 0x34, 0x70, 0x74, 0x74,
	0x22, 0x22, 0x62, 0x26, 0x32, 0x32, 0x72, 0x36,
	0x26, 0x62, 0x66, 0x66, 0x36, 0x72, 0x76, 0x76,
	0xa0, 0x28, 0xe0, 0x2c, 0xb0, 0x38, 0xf0, 0x3c,
	0xa4, 0x68, 0xe4, 0x6c, 0xb4, 0x78, 0xf4, 0x7c,
	0xa2, 0x2a, 0xe2, 0x2e, 0xb2, 0x3a, 0xf2, 0x3e,
	0xa6, 0x6a, 0xe6, 0x6e, 0xb6, 0x7a, 0xf6, 0x7e,
	0x08, 0x80, 0x48, 0x84, 0x18, 0x90, 0x58, 0x94,
	0x0c, 0xc0, 0x4c, 0xc4, 0x1c, 0xd0, 0x5c, 0xd4,
	0x0a, 0x82, 0x4a, 0x86, 0x1a, 0x92, 0x5a, 0x96,
	0x0e, 0xc2, 0x4e, 0xc6, 0x1e, 0xd2, 0x5e, 0xd6,
	0x88, 0x88, 0xc8, 0x8c, 0x98, 0x98, 0xd8, 0x9c,
	0x8c, 0xc8, 0xcc, 0xcc, 0x9c, 0xd8, 0xdc, 0xdc,
	0x8a, 0x8a, 0xca, 0x8e, 0x9a, 0x9a, 0xda, 0x9e,
	0x8e, 0xca, 0xce, 0xce, 0x9e, 0xda, 0xde, 0xde,
	0x28, 0xa0, 0x68, 0xa4, 0x38, 0xb0, 0x78, 0xb4,
	0x2c, 0xe0, 0x6c, 0xe4, 0x3c, 0xf0, 0x7c, 0xf4,
	0x2a, 0xa2, 0x6a, 0xa6, 0x3a, 0xb2, 0x7a, 0xb6,
	0x2e, 0xe2, 0x6e, 0xe6, 0x3e, 0xf2, 0x7e, 0xf6,
	0xa8, 0xa8, 0xe8, 0xac, 0xb8, 0xb8, 0xf8, 0xbc,
	0xac, 0xe8, 0xec, 0xec, 0xbc, 0xf8, 0xfc, 0xfc,
	0xaa, 0xaa, 0xea, 0xae, 0xba, 0xba, 0xfa, 0xbe,
	0xae, 0xea, 0xee, 0xee, 0xbe, 0xfa, 0xfe, 0xfe
};

static const u8 rs[256] = {
	0x00, 0x00, 0x80, 0x80, 0x02,