anubis.c

/*
 * Cryptographic API.
 *
 * Anubis Algorithm
 *
 * The Anubis algorithm was developed by Paulo S. L. M. Barreto and
 * Vincent Rijmen.
 *
 * See
 *
 *	P.S.L.M. Barreto, V. Rijmen,
 *	``The Anubis block cipher,''
 *	NESSIE submission, 2000.
 *
 * This software implements the "tweaked" version of Anubis.
 * Only the S-box and (consequently) the rounds constants have been
 * changed.
 *
 * The original authors have disclaimed all copyright interest in this
 * code and thus put it in the public domain. The subsequent authors
 * have put this under the GNU General Public License.
 *
 * By Aaron Grothe ajgrothe@yahoo.com, October 28, 2004
 *
 * 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 <crypto/algapi.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <asm/byteorder.h>
#include <linux/types.h>

#define ANUBIS_MIN_KEY_SIZE	16
#define ANUBIS_MAX_KEY_SIZE	40
#define ANUBIS_BLOCK_SIZE	16
#define ANUBIS_MAX_N		10
#define ANUBIS_MAX_ROUNDS	(8 + ANUBIS_MAX_N)

struct anubis_ctx {
	int key_len; // in bits
	int R;
	u32 E[ANUBIS_MAX_ROUNDS + 1][4];
	u32 D[ANUBIS_MAX_ROUNDS + 1][4];
};

static const u32 T0[256] = {
	0xba69d2bbU, 0x54a84de5U, 0x2f5ebce2U, 0x74e8cd25U,
	0x53a651f7U, 0xd3bb6bd0U, 0xd2b96fd6U, 0x4d9a29b3U,
	0x50a05dfdU, 0xac458acfU, 0x8d070e09U, 0xbf63c6a5U,
	0x70e0dd3dU, 0x52a455f1U, 0x9a29527bU, 0x4c982db5U,
	0xeac98f46U, 0xd5b773c4U, 0x97336655U, 0xd1bf63dcU,
	0x3366ccaaU, 0x51a259fbU, 0x5bb671c7U, 0xa651a2f3U,
	0xdea15ffeU, 0x48903dadU, 0xa84d9ad7U, 0x992f5e71U,
	0xdbab4be0U, 0x3264c8acU, 0xb773e695U, 0xfce5d732U,
	0xe3dbab70U, 0x9e214263U, 0x913f7e41U, 0x9b2b567dU,
	0xe2d9af76U, 0xbb6bd6bdU, 0x4182199bU, 0x6edca579U,
	0xa557aef9U, 0xcb8b0b80U, 0x6bd6b167U, 0x95376e59U,
	0xa15fbee1U, 0xf3fbeb10U, 0xb17ffe81U, 0x0204080cU,
	0xcc851792U, 0xc49537a2U, 0x1d3a744eU, 0x14285078U,
	0xc39b2bb0U, 0x63c69157U, 0xdaa94fe6U, 0x5dba69d3U,
	0x5fbe61dfU, 0xdca557f2U, 0x7dfae913U, 0xcd871394U,
	0x7ffee11fU, 0x5ab475c1U, 0x6cd8ad75U, 0x5cb86dd5U,
	0xf7f3fb08U, 0x264c98d4U, 0xffe3db38U, 0xedc79354U,
	0xe8cd874aU, 0x9d274e69U, 0x6fdea17fU, 0x8e010203U,