[mirror_ubuntu-bionic-kernel.git] / crypto / tea.c

/* 
 * Cryptographic API.
 *
 * TEA, XTEA, and XETA crypto alogrithms
 *
 * The TEA and Xtended TEA algorithms were developed by David Wheeler 
 * and Roger Needham at the Computer Laboratory of Cambridge University.
 *
 * Due to the order of evaluation in XTEA many people have incorrectly
 * implemented it.  XETA (XTEA in the wrong order), exists for
 * compatibility with these implementations.
 *
 * Copyright (c) 2004 Aaron Grothe ajgrothe@yahoo.com
 *
 * 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 <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <asm/byteorder.h>
#include <asm/scatterlist.h>
#include <linux/crypto.h>
#include <linux/types.h>

#define TEA_KEY_SIZE		16
#define TEA_BLOCK_SIZE		8
#define TEA_ROUNDS		32
#define TEA_DELTA		0x9e3779b9

#define XTEA_KEY_SIZE		16
#define XTEA_BLOCK_SIZE		8
#define XTEA_ROUNDS		32
#define XTEA_DELTA		0x9e3779b9

struct tea_ctx {
	u32 KEY[4];
};

struct xtea_ctx {
	u32 KEY[4];
};

static int tea_setkey(struct crypto_tfm *tfm, const u8 *in_key,
		      unsigned int key_len, u32 *flags)
{
	struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
	const __le32 *key = (const __le32 *)in_key;
	
	if (key_len != 16)
	{
		*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
		return -EINVAL;
	}

	ctx->KEY[0] = le32_to_cpu(key[0]);
	ctx->KEY[1] = le32_to_cpu(key[1]);
	ctx->KEY[2] = le32_to_cpu(key[2]);
	ctx->KEY[3] = le32_to_cpu(key[3]);

	return 0; 

}

static void tea_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	u32 y, z, n, sum = 0;
	u32 k0, k1, k2, k3;
	struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
	const __le32 *in = (const __le32 *)src;
	__le32 *out = (__le32 *)dst;

	y = le32_to_cpu(in[0]);
	z = le32_to_cpu(in[1]);

	k0 = ctx->KEY[0];
	k1 = ctx->KEY[1];
	k2 = ctx->KEY[2];
	k3 = ctx->KEY[3];

	n = TEA_ROUNDS;

	while (n-- > 0) {
		sum += TEA_DELTA;
		y += ((z << 4) + k0) ^ (z + sum) ^ ((z >> 5) + k1);
		z += ((y << 4) + k2) ^ (y + sum) ^ ((y >> 5) + k3);
	}
	
	out[0] = cpu_to_le32(y);
	out[1] = cpu_to_le32(z);
}

static void tea_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	u32 y, z, n, sum;
	u32 k0, k1, k2, k3;
	struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
	const __le32 *in = (const __le32 *)src;
	__le32 *out = (__le32 *)dst;

	y = le32_to_cpu(in[0]);
	z = le32_to_cpu(in[1]);

	k0 = ctx->KEY[0];
	k1 = ctx->KEY[1];
	k2 = ctx->KEY[2];
	k3 = ctx->KEY[3];

	sum = TEA_DELTA << 5;

	n = TEA_ROUNDS;

	while (n-- > 0) {
		z -= ((y << 4) + k2) ^ (y + sum) ^ ((y >> 5) + k3);
		y -= ((z << 4) + k0) ^ (z + sum) ^ ((z >> 5) + k1);
		sum -= TEA_DELTA;
	}
	
	out[0] = cpu_to_le32(y);
	out[1] = cpu_to_le32(z);
}

static int xtea_setkey(struct crypto_tfm *tfm, const u8 *in_key,
		       unsigned int key_len, u32 *flags)
{
	struct xtea_ctx *ctx = crypto_tfm_ctx(tfm);
	const __le32 *key = (const __le32 *)in_key;
	
	if (key_len != 16)
	{
		*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
		return -EINVAL;
	}

	ctx->KEY[0] = le32_to_cpu(key[0]);
	ctx->KEY[1] = le32_to_cpu(key[1]);
	ctx->KEY[2] = le32_to_cpu(key[2]);
	ctx->KEY[3] = le32_to_cpu(key[3]);

	return 0; 

}

static void xtea_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	u32 y, z, sum = 0;
	u32 limit = XTEA_DELTA * XTEA_ROUNDS;
	struct xtea_ctx *ctx = crypto_tfm_ctx(tfm);
	const __le32 *in = (const __le32 *)src;
	__le32 *out = (__le32 *)dst;

	y = le32_to_cpu(in[0]);
	z = le32_to_cpu(in[1]);

	while (sum != limit) {
		y += ((z << 4 ^ z >> 5) + z) ^ (sum + ctx->KEY[sum&3]); 
		sum += XTEA_DELTA;
		z += ((y << 4 ^ y >> 5) + y) ^ (sum + ctx->KEY[sum>>11 &3]); 
	}
	
	out[0] = cpu_to_le32(y);
	out[1] = cpu_to_le32(z);
}

static void xtea_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	u32 y, z, sum;
	struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
	const __le32 *in = (const __le32 *)src;
	__le32 *out = (__le32 *)dst;

	y = le32_to_cpu(in[0]);
	z = le32_to_cpu(in[1]);

	sum = XTEA_DELTA * XTEA_ROUNDS;

	while (sum) {
		z -= ((y << 4 ^ y >> 5) + y) ^ (sum + ctx->KEY[sum>>11 & 3]);
		sum -= XTEA_DELTA;
		y -= ((z << 4 ^ z >> 5) + z) ^ (sum + ctx->KEY[sum & 3]);
	}
	
	out[0] = cpu_to_le32(y);
	out[1] = cpu_to_le32(z);
}


static void xeta_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	u32 y, z, sum = 0;
	u32 limit = XTEA_DELTA * XTEA_ROUNDS;
	struct xtea_ctx *ctx = crypto_tfm_ctx(tfm);
	const __le32 *in = (const __le32 *)src;
	__le32 *out = (__le32 *)dst;

	y = le32_to_cpu(in[0]);
	z = le32_to_cpu(in[1]);

	while (sum != limit) {
		y += (z << 4 ^ z >> 5) + (z ^ sum) + ctx->KEY[sum&3];
		sum += XTEA_DELTA;
		z += (y << 4 ^ y >> 5) + (y ^ sum) + ctx->KEY[sum>>11 &3];
	}
	
	out[0] = cpu_to_le32(y);
	out[1] = cpu_to_le32(z);
}

static void xeta_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
	u32 y, z, sum;
	struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
	const __le32 *in = (const __le32 *)src;
	__le32 *out = (__le32 *)dst;

	y = le32_to_cpu(in[0]);
	z = le32_to_cpu(in[1]);

	sum = XTEA_DELTA * XTEA_ROUNDS;

	while (sum) {
		z -= (y << 4 ^ y >> 5) + (y ^ sum) + ctx->KEY[sum>>11 & 3];
		sum -= XTEA_DELTA;
		y -= (z << 4 ^ z >> 5) + (z ^ sum) + ctx->KEY[sum & 3];
	}
	
	out[0] = cpu_to_le32(y);
	out[1] = cpu_to_le32(z);
}

static struct crypto_alg tea_alg = {
	.cra_name		=	"tea",
	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize		=	TEA_BLOCK_SIZE,
	.cra_ctxsize		=	sizeof (struct tea_ctx),
	.cra_alignmask		=	3,
	.cra_module		=	THIS_MODULE,
	.cra_list		=	LIST_HEAD_INIT(tea_alg.cra_list),
	.cra_u			=	{ .cipher = {
	.cia_min_keysize	=	TEA_KEY_SIZE,
	.cia_max_keysize	=	TEA_KEY_SIZE,
	.cia_setkey		= 	tea_setkey,
	.cia_encrypt		=	tea_encrypt,
	.cia_decrypt		=	tea_decrypt } }
};

static struct crypto_alg xtea_alg = {
	.cra_name		=	"xtea",
	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize		=	XTEA_BLOCK_SIZE,
	.cra_ctxsize		=	sizeof (struct xtea_ctx),
	.cra_alignmask		=	3,
	.cra_module		=	THIS_MODULE,
	.cra_list		=	LIST_HEAD_INIT(xtea_alg.cra_list),
	.cra_u			=	{ .cipher = {
	.cia_min_keysize	=	XTEA_KEY_SIZE,
	.cia_max_keysize	=	XTEA_KEY_SIZE,
	.cia_setkey		= 	xtea_setkey,
	.cia_encrypt		=	xtea_encrypt,
	.cia_decrypt		=	xtea_decrypt } }
};

static struct crypto_alg xeta_alg = {
	.cra_name		=	"xeta",
	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize		=	XTEA_BLOCK_SIZE,
	.cra_ctxsize		=	sizeof (struct xtea_ctx),
	.cra_alignmask		=	3,
	.cra_module		=	THIS_MODULE,
	.cra_list		=	LIST_HEAD_INIT(xtea_alg.cra_list),
	.cra_u			=	{ .cipher = {
	.cia_min_keysize	=	XTEA_KEY_SIZE,
	.cia_max_keysize	=	XTEA_KEY_SIZE,
	.cia_setkey		= 	xtea_setkey,
	.cia_encrypt		=	xeta_encrypt,
	.cia_decrypt		=	xeta_decrypt } }
};

static int __init init(void)
{
	int ret = 0;
	
	ret = crypto_register_alg(&tea_alg);
	if (ret < 0)
		goto out;

	ret = crypto_register_alg(&xtea_alg);
	if (ret < 0) {
		crypto_unregister_alg(&tea_alg);
		goto out;
	}

	ret = crypto_register_alg(&xeta_alg);
	if (ret < 0) {
		crypto_unregister_alg(&tea_alg);
		crypto_unregister_alg(&xtea_alg);
		goto out;
	}

out:	
	return ret;
}

static void __exit fini(void)
{
	crypto_unregister_alg(&tea_alg);
	crypto_unregister_alg(&xtea_alg);
	crypto_unregister_alg(&xeta_alg);
}

MODULE_ALIAS("xtea");
MODULE_ALIAS("xeta");

module_init(init);
module_exit(fini);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("TEA, XTEA & XETA Cryptographic Algorithms");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Cryptographic API.
	3	*
fb4f10ed	4	* TEA, XTEA, and XETA crypto alogrithms
1da177e4 LT	5	*
	6	* The TEA and Xtended TEA algorithms were developed by David Wheeler
	7	* and Roger Needham at the Computer Laboratory of Cambridge University.
	8	*
fb4f10ed AG	9	* Due to the order of evaluation in XTEA many people have incorrectly
	10	* implemented it. XETA (XTEA in the wrong order), exists for
	11	* compatibility with these implementations.
	12	*
1da177e4 LT	13	* Copyright (c) 2004 Aaron Grothe ajgrothe@yahoo.com
	14	*
	15	* This program is free software; you can redistribute it and/or modify
	16	* it under the terms of the GNU General Public License as published by
	17	* the Free Software Foundation; either version 2 of the License, or
	18	* (at your option) any later version.
	19	*
	20	*/
	21
	22	#include <linux/init.h>
	23	#include <linux/module.h>
	24	#include <linux/mm.h>
06ace7a9	25	#include <asm/byteorder.h>
1da177e4 LT	26	#include <asm/scatterlist.h>
1da177e4 LT	27	#include <linux/crypto.h>
06ace7a9	28	#include <linux/types.h>
1da177e4 LT	29
	30	#define TEA_KEY_SIZE 16
	31	#define TEA_BLOCK_SIZE 8
	32	#define TEA_ROUNDS 32
	33	#define TEA_DELTA 0x9e3779b9
	34
	35	#define XTEA_KEY_SIZE 16
	36	#define XTEA_BLOCK_SIZE 8
	37	#define XTEA_ROUNDS 32
	38	#define XTEA_DELTA 0x9e3779b9
	39
1da177e4 LT	40	struct tea_ctx {
	41	u32 KEY[4];
	42	};
	43
	44	struct xtea_ctx {
	45	u32 KEY[4];
	46	};
	47
6c2bb98b HX	48	static int tea_setkey(struct crypto_tfm tfm, const u8 in_key,
	49	unsigned int key_len, u32 *flags)
	50	{
	51	struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
06ace7a9	52	const __le32 key = (const __le32 )in_key;
1da177e4 LT	53
	54	if (key_len != 16)
	55	{
	56	*flags \|= CRYPTO_TFM_RES_BAD_KEY_LEN;
	57	return -EINVAL;
	58	}
	59
06ace7a9 HX	60	ctx->KEY[0] = le32_to_cpu(key[0]);
	61	ctx->KEY[1] = le32_to_cpu(key[1]);
	62	ctx->KEY[2] = le32_to_cpu(key[2]);
	63	ctx->KEY[3] = le32_to_cpu(key[3]);
1da177e4 LT	64
	65	return 0;
	66
	67	}
	68
6c2bb98b HX	69	static void tea_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
6c2bb98b HX	70	{
1da177e4 LT	71	u32 y, z, n, sum = 0;
1da177e4 LT	72	u32 k0, k1, k2, k3;
6c2bb98b	73	struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
06ace7a9 HX	74	const __le32 in = (const __le32 )src;
06ace7a9 HX	75	__le32 out = (__le32 )dst;
1da177e4	76
06ace7a9 HX	77	y = le32_to_cpu(in[0]);
06ace7a9 HX	78	z = le32_to_cpu(in[1]);
1da177e4 LT	79
	80	k0 = ctx->KEY[0];
	81	k1 = ctx->KEY[1];
	82	k2 = ctx->KEY[2];
	83	k3 = ctx->KEY[3];
	84
	85	n = TEA_ROUNDS;
	86
	87	while (n-- > 0) {
	88	sum += TEA_DELTA;
	89	y += ((z << 4) + k0) ^ (z + sum) ^ ((z >> 5) + k1);
	90	z += ((y << 4) + k2) ^ (y + sum) ^ ((y >> 5) + k3);
	91	}
	92
06ace7a9 HX	93	out[0] = cpu_to_le32(y);
06ace7a9 HX	94	out[1] = cpu_to_le32(z);
1da177e4 LT	95	}
1da177e4 LT	96
6c2bb98b HX	97	static void tea_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
6c2bb98b HX	98	{
1da177e4 LT	99	u32 y, z, n, sum;
1da177e4 LT	100	u32 k0, k1, k2, k3;
6c2bb98b	101	struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
06ace7a9 HX	102	const __le32 in = (const __le32 )src;
06ace7a9 HX	103	__le32 out = (__le32 )dst;
1da177e4	104
06ace7a9 HX	105	y = le32_to_cpu(in[0]);
06ace7a9 HX	106	z = le32_to_cpu(in[1]);
1da177e4 LT	107
	108	k0 = ctx->KEY[0];
	109	k1 = ctx->KEY[1];
	110	k2 = ctx->KEY[2];
	111	k3 = ctx->KEY[3];
	112
	113	sum = TEA_DELTA << 5;
	114
	115	n = TEA_ROUNDS;
	116
	117	while (n-- > 0) {
	118	z -= ((y << 4) + k2) ^ (y + sum) ^ ((y >> 5) + k3);
	119	y -= ((z << 4) + k0) ^ (z + sum) ^ ((z >> 5) + k1);
	120	sum -= TEA_DELTA;
	121	}
	122
06ace7a9 HX	123	out[0] = cpu_to_le32(y);
06ace7a9 HX	124	out[1] = cpu_to_le32(z);
1da177e4 LT	125	}
1da177e4 LT	126
6c2bb98b HX	127	static int xtea_setkey(struct crypto_tfm tfm, const u8 in_key,
	128	unsigned int key_len, u32 *flags)
	129	{
	130	struct xtea_ctx *ctx = crypto_tfm_ctx(tfm);
06ace7a9	131	const __le32 key = (const __le32 )in_key;
1da177e4 LT	132
	133	if (key_len != 16)
	134	{
	135	*flags \|= CRYPTO_TFM_RES_BAD_KEY_LEN;
	136	return -EINVAL;
	137	}
	138
06ace7a9 HX	139	ctx->KEY[0] = le32_to_cpu(key[0]);
	140	ctx->KEY[1] = le32_to_cpu(key[1]);
	141	ctx->KEY[2] = le32_to_cpu(key[2]);
	142	ctx->KEY[3] = le32_to_cpu(key[3]);
1da177e4 LT	143
	144	return 0;
	145
	146	}
	147
6c2bb98b HX	148	static void xtea_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
6c2bb98b HX	149	{
1da177e4 LT	150	u32 y, z, sum = 0;
1da177e4 LT	151	u32 limit = XTEA_DELTA * XTEA_ROUNDS;
6c2bb98b	152	struct xtea_ctx *ctx = crypto_tfm_ctx(tfm);
06ace7a9 HX	153	const __le32 in = (const __le32 )src;
06ace7a9 HX	154	__le32 out = (__le32 )dst;
1da177e4	155
06ace7a9 HX	156	y = le32_to_cpu(in[0]);
06ace7a9 HX	157	z = le32_to_cpu(in[1]);
1da177e4 LT	158
1da177e4 LT	159	while (sum != limit) {
fb4f10ed	160	y += ((z << 4 ^ z >> 5) + z) ^ (sum + ctx->KEY[sum&3]);
1da177e4	161	sum += XTEA_DELTA;
fb4f10ed	162	z += ((y << 4 ^ y >> 5) + y) ^ (sum + ctx->KEY[sum>>11 &3]);
1da177e4 LT	163	}
1da177e4 LT	164
06ace7a9 HX	165	out[0] = cpu_to_le32(y);
06ace7a9 HX	166	out[1] = cpu_to_le32(z);
1da177e4 LT	167	}
1da177e4 LT	168
6c2bb98b HX	169	static void xtea_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
6c2bb98b HX	170	{
1da177e4	171	u32 y, z, sum;
6c2bb98b	172	struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
06ace7a9 HX	173	const __le32 in = (const __le32 )src;
06ace7a9 HX	174	__le32 out = (__le32 )dst;
1da177e4	175
06ace7a9 HX	176	y = le32_to_cpu(in[0]);
06ace7a9 HX	177	z = le32_to_cpu(in[1]);
1da177e4 LT	178
	179	sum = XTEA_DELTA * XTEA_ROUNDS;
	180
fb4f10ed AG	181	while (sum) {
	182	z -= ((y << 4 ^ y >> 5) + y) ^ (sum + ctx->KEY[sum>>11 & 3]);
	183	sum -= XTEA_DELTA;
	184	y -= ((z << 4 ^ z >> 5) + z) ^ (sum + ctx->KEY[sum & 3]);
	185	}
	186
06ace7a9 HX	187	out[0] = cpu_to_le32(y);
06ace7a9 HX	188	out[1] = cpu_to_le32(z);
fb4f10ed AG	189	}
	190
	191
6c2bb98b HX	192	static void xeta_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
6c2bb98b HX	193	{
fb4f10ed AG	194	u32 y, z, sum = 0;
fb4f10ed AG	195	u32 limit = XTEA_DELTA * XTEA_ROUNDS;
6c2bb98b	196	struct xtea_ctx *ctx = crypto_tfm_ctx(tfm);
06ace7a9 HX	197	const __le32 in = (const __le32 )src;
06ace7a9 HX	198	__le32 out = (__le32 )dst;
fb4f10ed	199
06ace7a9 HX	200	y = le32_to_cpu(in[0]);
06ace7a9 HX	201	z = le32_to_cpu(in[1]);
fb4f10ed AG	202
	203	while (sum != limit) {
	204	y += (z << 4 ^ z >> 5) + (z ^ sum) + ctx->KEY[sum&3];
	205	sum += XTEA_DELTA;
	206	z += (y << 4 ^ y >> 5) + (y ^ sum) + ctx->KEY[sum>>11 &3];
	207	}
	208
06ace7a9 HX	209	out[0] = cpu_to_le32(y);
06ace7a9 HX	210	out[1] = cpu_to_le32(z);
fb4f10ed AG	211	}
fb4f10ed AG	212
6c2bb98b HX	213	static void xeta_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
6c2bb98b HX	214	{
fb4f10ed	215	u32 y, z, sum;
6c2bb98b	216	struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
06ace7a9 HX	217	const __le32 in = (const __le32 )src;
06ace7a9 HX	218	__le32 out = (__le32 )dst;
fb4f10ed	219
06ace7a9 HX	220	y = le32_to_cpu(in[0]);
06ace7a9 HX	221	z = le32_to_cpu(in[1]);
fb4f10ed AG	222
	223	sum = XTEA_DELTA * XTEA_ROUNDS;
	224
1da177e4 LT	225	while (sum) {
	226	z -= (y << 4 ^ y >> 5) + (y ^ sum) + ctx->KEY[sum>>11 & 3];
	227	sum -= XTEA_DELTA;
	228	y -= (z << 4 ^ z >> 5) + (z ^ sum) + ctx->KEY[sum & 3];
	229	}
	230
06ace7a9 HX	231	out[0] = cpu_to_le32(y);
06ace7a9 HX	232	out[1] = cpu_to_le32(z);
1da177e4 LT	233	}
	234
	235	static struct crypto_alg tea_alg = {
	236	.cra_name = "tea",
	237	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	238	.cra_blocksize = TEA_BLOCK_SIZE,
	239	.cra_ctxsize = sizeof (struct tea_ctx),
a429d260	240	.cra_alignmask = 3,
1da177e4 LT	241	.cra_module = THIS_MODULE,
	242	.cra_list = LIST_HEAD_INIT(tea_alg.cra_list),
	243	.cra_u = { .cipher = {
	244	.cia_min_keysize = TEA_KEY_SIZE,
	245	.cia_max_keysize = TEA_KEY_SIZE,
	246	.cia_setkey = tea_setkey,
	247	.cia_encrypt = tea_encrypt,
	248	.cia_decrypt = tea_decrypt } }
	249	};
	250
	251	static struct crypto_alg xtea_alg = {
	252	.cra_name = "xtea",
	253	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	254	.cra_blocksize = XTEA_BLOCK_SIZE,
	255	.cra_ctxsize = sizeof (struct xtea_ctx),
a429d260	256	.cra_alignmask = 3,
1da177e4 LT	257	.cra_module = THIS_MODULE,
	258	.cra_list = LIST_HEAD_INIT(xtea_alg.cra_list),
	259	.cra_u = { .cipher = {
	260	.cia_min_keysize = XTEA_KEY_SIZE,
	261	.cia_max_keysize = XTEA_KEY_SIZE,
	262	.cia_setkey = xtea_setkey,
	263	.cia_encrypt = xtea_encrypt,
	264	.cia_decrypt = xtea_decrypt } }
	265	};
	266
fb4f10ed AG	267	static struct crypto_alg xeta_alg = {
	268	.cra_name = "xeta",
	269	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	270	.cra_blocksize = XTEA_BLOCK_SIZE,
	271	.cra_ctxsize = sizeof (struct xtea_ctx),
a429d260	272	.cra_alignmask = 3,
fb4f10ed AG	273	.cra_module = THIS_MODULE,
	274	.cra_list = LIST_HEAD_INIT(xtea_alg.cra_list),
	275	.cra_u = { .cipher = {
	276	.cia_min_keysize = XTEA_KEY_SIZE,
	277	.cia_max_keysize = XTEA_KEY_SIZE,
	278	.cia_setkey = xtea_setkey,
	279	.cia_encrypt = xeta_encrypt,
	280	.cia_decrypt = xeta_decrypt } }
	281	};
	282
1da177e4 LT	283	static int __init init(void)
	284	{
	285	int ret = 0;
	286
	287	ret = crypto_register_alg(&tea_alg);
	288	if (ret < 0)
	289	goto out;
	290
	291	ret = crypto_register_alg(&xtea_alg);
	292	if (ret < 0) {
	293	crypto_unregister_alg(&tea_alg);
	294	goto out;
	295	}
	296
fb4f10ed AG	297	ret = crypto_register_alg(&xeta_alg);
	298	if (ret < 0) {
	299	crypto_unregister_alg(&tea_alg);
	300	crypto_unregister_alg(&xtea_alg);
	301	goto out;
	302	}
	303
1da177e4 LT	304	out:
	305	return ret;
	306	}
	307
	308	static void __exit fini(void)
	309	{
	310	crypto_unregister_alg(&tea_alg);
	311	crypto_unregister_alg(&xtea_alg);
fb4f10ed	312	crypto_unregister_alg(&xeta_alg);
1da177e4 LT	313	}
	314
	315	MODULE_ALIAS("xtea");
fb4f10ed	316	MODULE_ALIAS("xeta");
1da177e4 LT	317
	318	module_init(init);
	319	module_exit(fini);
	320
	321	MODULE_LICENSE("GPL");
fb4f10ed	322	MODULE_DESCRIPTION("TEA, XTEA & XETA Cryptographic Algorithms");