path: root/crypto/aes_generic.c

/*
 * Cryptographic API.
 *
 * AES Cipher Algorithm.
 *
 * Based on Brian Gladman's code.
 *
 * Linux developers:
 *  Alexander Kjeldaas <astor@fast.no>
 *  Herbert Valerio Riedel <hvr@hvrlab.org>
 *  Kyle McMartin <kyle@debian.org>
 *  Adam J. Richter <adam@yggdrasil.com> (conversion to 2.5 API).
 *
 * 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.
 *
 * ---------------------------------------------------------------------------
 * Copyright (c) 2002, Dr Brian Gladman <brg@gladman.me.uk>, Worcester, UK.
 * All rights reserved.
 *
 * LICENSE TERMS
 *
 * The free distribution and use of this software in both source and binary
 * form is allowed (with or without changes) provided that:
 *
 *   1. distributions of this source code include the above copyright
 *      notice, this list of conditions and the following disclaimer;
 *
 *   2. distributions in binary form include the above copyright
 *      notice, this list of conditions and the following disclaimer
 *      in the documentation and/or other associated materials;
 *
 *   3. the copyright holder's name is not used to endorse products
 *      built using this software without specific written permission.
 *
 * ALTERNATIVELY, provided that this notice is retained in full, this product
 * may be distributed under the terms of the GNU General Public License (GPL),
 * in which case the provisions of the GPL apply INSTEAD OF those given above.
 *
 * DISCLAIMER
 *
 * This software is provided 'as is' with no explicit or implied warranties
 * in respect of its properties, including, but not limited to, correctness
 * and/or fitness for purpose.
 * ---------------------------------------------------------------------------
 */

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

static inline u8 byte(const u32 x, const unsigned n)
{
	return x >> (n << 3);
}

/* cacheline-aligned to facilitate prefetching into cache */
__visible const u32 crypto_ft_tab[4][256] ____cacheline_aligned = {
	{
		0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6,
		0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591,
		0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56,
		0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec,
		0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa,
		0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb,
		0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45,
		0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b,
		0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c,
		0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83,
		0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9,
		0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a,
		0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d,
		0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f,
		0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df,
		0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea,
		0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34,
		0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b,
		0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d,
		0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413,
		0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1,
		0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6,
		0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972,
		0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85,
		0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed