[linux.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 [email protected]
 *
 * 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(void *ctx_arg, const u8 *in_key,
                       unsigned int key_len, u32 *flags)
{ 
	struct tea_ctx *ctx = ctx_arg;
	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(void *ctx_arg, u8 *dst, const u8 *src)
{ 
	u32 y, z, n, sum = 0;
	u32 k0, k1, k2, k3;

	struct tea_ctx *ctx = ctx_arg;
	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(void *ctx_arg, u8 *dst, const u8 *src)
{ 
	u32 y, z, n, sum;
	u32 k0, k1, k2, k3;
	struct tea_ctx *ctx = ctx_arg;
	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(void *ctx_arg, const u8 *in_key,
                       unsigned int key_len, u32 *flags)
{ 
	struct xtea_ctx *ctx = ctx_arg;
	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(void *ctx_arg, u8 *dst, const u8 *src)
{ 
	u32 y, z, sum = 0;
	u32 limit = XTEA_DELTA * XTEA_ROUNDS;

	struct xtea_ctx *ctx = ctx_arg;
	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(void *ctx_arg, u8 *dst, const u8 *src)
{ 
	u32 y, z, sum;
	struct tea_ctx *ctx = ctx_arg;
	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(void *ctx_arg, u8 *dst, const u8 *src)
{ 
	u32 y, z, sum = 0;
	u32 limit = XTEA_DELTA * XTEA_ROUNDS;

	struct xtea_ctx *ctx = ctx_arg;
	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(void *ctx_arg, u8 *dst, const u8 *src)
{ 
	u32 y, z, sum;
	struct tea_ctx *ctx = ctx_arg;
	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 [email protected]
	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
	48	static int tea_setkey(void ctx_arg, const u8 in_key,
	49	unsigned int key_len, u32 *flags)
	50	{
1da177e4	51	struct tea_ctx *ctx = ctx_arg;
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
	69	static void tea_encrypt(void ctx_arg, u8 dst, const u8 *src)
	70	{
	71	u32 y, z, n, sum = 0;
	72	u32 k0, k1, k2, k3;
	73
	74	struct tea_ctx *ctx = ctx_arg;
06ace7a9 HX	75	const __le32 in = (const __le32 )src;
06ace7a9 HX	76	__le32 out = (__le32 )dst;
1da177e4	77
06ace7a9 HX	78	y = le32_to_cpu(in[0]);
06ace7a9 HX	79	z = le32_to_cpu(in[1]);
1da177e4 LT	80
	81	k0 = ctx->KEY[0];
	82	k1 = ctx->KEY[1];
	83	k2 = ctx->KEY[2];
	84	k3 = ctx->KEY[3];
	85
	86	n = TEA_ROUNDS;
	87
	88	while (n-- > 0) {
	89	sum += TEA_DELTA;
	90	y += ((z << 4) + k0) ^ (z + sum) ^ ((z >> 5) + k1);
	91	z += ((y << 4) + k2) ^ (y + sum) ^ ((y >> 5) + k3);
	92	}
	93
06ace7a9 HX	94	out[0] = cpu_to_le32(y);
06ace7a9 HX	95	out[1] = cpu_to_le32(z);
1da177e4 LT	96	}
	97
	98	static void tea_decrypt(void ctx_arg, u8 dst, const u8 *src)
	99	{
	100	u32 y, z, n, sum;
	101	u32 k0, k1, k2, k3;
1da177e4	102	struct tea_ctx *ctx = ctx_arg;
06ace7a9 HX	103	const __le32 in = (const __le32 )src;
06ace7a9 HX	104	__le32 out = (__le32 )dst;
1da177e4	105
06ace7a9 HX	106	y = le32_to_cpu(in[0]);
06ace7a9 HX	107	z = le32_to_cpu(in[1]);
1da177e4 LT	108
	109	k0 = ctx->KEY[0];
	110	k1 = ctx->KEY[1];
	111	k2 = ctx->KEY[2];
	112	k3 = ctx->KEY[3];
	113
	114	sum = TEA_DELTA << 5;
	115
	116	n = TEA_ROUNDS;
	117
	118	while (n-- > 0) {
	119	z -= ((y << 4) + k2) ^ (y + sum) ^ ((y >> 5) + k3);
	120	y -= ((z << 4) + k0) ^ (z + sum) ^ ((z >> 5) + k1);
	121	sum -= TEA_DELTA;
	122	}
	123
06ace7a9 HX	124	out[0] = cpu_to_le32(y);
06ace7a9 HX	125	out[1] = cpu_to_le32(z);
1da177e4 LT	126	}
	127
	128	static int xtea_setkey(void ctx_arg, const u8 in_key,
	129	unsigned int key_len, u32 *flags)
	130	{
1da177e4	131	struct xtea_ctx *ctx = ctx_arg;
06ace7a9	132	const __le32 key = (const __le32 )in_key;
1da177e4 LT	133
	134	if (key_len != 16)
	135	{
	136	*flags \|= CRYPTO_TFM_RES_BAD_KEY_LEN;
	137	return -EINVAL;
	138	}
	139
06ace7a9 HX	140	ctx->KEY[0] = le32_to_cpu(key[0]);
	141	ctx->KEY[1] = le32_to_cpu(key[1]);
	142	ctx->KEY[2] = le32_to_cpu(key[2]);
	143	ctx->KEY[3] = le32_to_cpu(key[3]);
1da177e4 LT	144
	145	return 0;
	146
	147	}
	148
	149	static void xtea_encrypt(void ctx_arg, u8 dst, const u8 *src)
	150	{
1da177e4 LT	151	u32 y, z, sum = 0;
	152	u32 limit = XTEA_DELTA * XTEA_ROUNDS;
	153
	154	struct xtea_ctx *ctx = ctx_arg;
06ace7a9 HX	155	const __le32 in = (const __le32 )src;
06ace7a9 HX	156	__le32 out = (__le32 )dst;
1da177e4	157
06ace7a9 HX	158	y = le32_to_cpu(in[0]);
06ace7a9 HX	159	z = le32_to_cpu(in[1]);
1da177e4 LT	160
1da177e4 LT	161	while (sum != limit) {
fb4f10ed	162	y += ((z << 4 ^ z >> 5) + z) ^ (sum + ctx->KEY[sum&3]);
1da177e4	163	sum += XTEA_DELTA;
fb4f10ed	164	z += ((y << 4 ^ y >> 5) + y) ^ (sum + ctx->KEY[sum>>11 &3]);
1da177e4 LT	165	}
1da177e4 LT	166
06ace7a9 HX	167	out[0] = cpu_to_le32(y);
06ace7a9 HX	168	out[1] = cpu_to_le32(z);
1da177e4 LT	169	}
	170
	171	static void xtea_decrypt(void ctx_arg, u8 dst, const u8 *src)
	172	{
1da177e4 LT	173	u32 y, z, sum;
1da177e4 LT	174	struct tea_ctx *ctx = ctx_arg;
06ace7a9 HX	175	const __le32 in = (const __le32 )src;
06ace7a9 HX	176	__le32 out = (__le32 )dst;
1da177e4	177
06ace7a9 HX	178	y = le32_to_cpu(in[0]);
06ace7a9 HX	179	z = le32_to_cpu(in[1]);
1da177e4 LT	180
	181	sum = XTEA_DELTA * XTEA_ROUNDS;
	182
fb4f10ed AG	183	while (sum) {
	184	z -= ((y << 4 ^ y >> 5) + y) ^ (sum + ctx->KEY[sum>>11 & 3]);
	185	sum -= XTEA_DELTA;
	186	y -= ((z << 4 ^ z >> 5) + z) ^ (sum + ctx->KEY[sum & 3]);
	187	}
	188
06ace7a9 HX	189	out[0] = cpu_to_le32(y);
06ace7a9 HX	190	out[1] = cpu_to_le32(z);
fb4f10ed AG	191	}
	192
	193
	194	static void xeta_encrypt(void ctx_arg, u8 dst, const u8 *src)
	195	{
fb4f10ed AG	196	u32 y, z, sum = 0;
	197	u32 limit = XTEA_DELTA * XTEA_ROUNDS;
	198
	199	struct xtea_ctx *ctx = ctx_arg;
06ace7a9 HX	200	const __le32 in = (const __le32 )src;
06ace7a9 HX	201	__le32 out = (__le32 )dst;
fb4f10ed	202
06ace7a9 HX	203	y = le32_to_cpu(in[0]);
06ace7a9 HX	204	z = le32_to_cpu(in[1]);
fb4f10ed AG	205
	206	while (sum != limit) {
	207	y += (z << 4 ^ z >> 5) + (z ^ sum) + ctx->KEY[sum&3];
	208	sum += XTEA_DELTA;
	209	z += (y << 4 ^ y >> 5) + (y ^ sum) + ctx->KEY[sum>>11 &3];
	210	}
	211
06ace7a9 HX	212	out[0] = cpu_to_le32(y);
06ace7a9 HX	213	out[1] = cpu_to_le32(z);
fb4f10ed AG	214	}
	215
	216	static void xeta_decrypt(void ctx_arg, u8 dst, const u8 *src)
	217	{
fb4f10ed AG	218	u32 y, z, sum;
fb4f10ed AG	219	struct tea_ctx *ctx = ctx_arg;
06ace7a9 HX	220	const __le32 in = (const __le32 )src;
06ace7a9 HX	221	__le32 out = (__le32 )dst;
fb4f10ed	222
06ace7a9 HX	223	y = le32_to_cpu(in[0]);
06ace7a9 HX	224	z = le32_to_cpu(in[1]);
fb4f10ed AG	225
	226	sum = XTEA_DELTA * XTEA_ROUNDS;
	227
1da177e4 LT	228	while (sum) {
	229	z -= (y << 4 ^ y >> 5) + (y ^ sum) + ctx->KEY[sum>>11 & 3];
	230	sum -= XTEA_DELTA;
	231	y -= (z << 4 ^ z >> 5) + (z ^ sum) + ctx->KEY[sum & 3];
	232	}
	233
06ace7a9 HX	234	out[0] = cpu_to_le32(y);
06ace7a9 HX	235	out[1] = cpu_to_le32(z);
1da177e4 LT	236	}
	237
	238	static struct crypto_alg tea_alg = {
	239	.cra_name = "tea",
	240	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	241	.cra_blocksize = TEA_BLOCK_SIZE,
	242	.cra_ctxsize = sizeof (struct tea_ctx),
a429d260	243	.cra_alignmask = 3,
1da177e4 LT	244	.cra_module = THIS_MODULE,
	245	.cra_list = LIST_HEAD_INIT(tea_alg.cra_list),
	246	.cra_u = { .cipher = {
	247	.cia_min_keysize = TEA_KEY_SIZE,
	248	.cia_max_keysize = TEA_KEY_SIZE,
	249	.cia_setkey = tea_setkey,
	250	.cia_encrypt = tea_encrypt,
	251	.cia_decrypt = tea_decrypt } }
	252	};
	253
	254	static struct crypto_alg xtea_alg = {
	255	.cra_name = "xtea",
	256	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	257	.cra_blocksize = XTEA_BLOCK_SIZE,
	258	.cra_ctxsize = sizeof (struct xtea_ctx),
a429d260	259	.cra_alignmask = 3,
1da177e4 LT	260	.cra_module = THIS_MODULE,
	261	.cra_list = LIST_HEAD_INIT(xtea_alg.cra_list),
	262	.cra_u = { .cipher = {
	263	.cia_min_keysize = XTEA_KEY_SIZE,
	264	.cia_max_keysize = XTEA_KEY_SIZE,
	265	.cia_setkey = xtea_setkey,
	266	.cia_encrypt = xtea_encrypt,
	267	.cia_decrypt = xtea_decrypt } }
	268	};
	269
fb4f10ed AG	270	static struct crypto_alg xeta_alg = {
	271	.cra_name = "xeta",
	272	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	273	.cra_blocksize = XTEA_BLOCK_SIZE,
	274	.cra_ctxsize = sizeof (struct xtea_ctx),
a429d260	275	.cra_alignmask = 3,
fb4f10ed AG	276	.cra_module = THIS_MODULE,
	277	.cra_list = LIST_HEAD_INIT(xtea_alg.cra_list),
	278	.cra_u = { .cipher = {
	279	.cia_min_keysize = XTEA_KEY_SIZE,
	280	.cia_max_keysize = XTEA_KEY_SIZE,
	281	.cia_setkey = xtea_setkey,
	282	.cia_encrypt = xeta_encrypt,
	283	.cia_decrypt = xeta_decrypt } }
	284	};
	285
1da177e4 LT	286	static int __init init(void)
	287	{
	288	int ret = 0;
	289
	290	ret = crypto_register_alg(&tea_alg);
	291	if (ret < 0)
	292	goto out;
	293
	294	ret = crypto_register_alg(&xtea_alg);
	295	if (ret < 0) {
	296	crypto_unregister_alg(&tea_alg);
	297	goto out;
	298	}
	299
fb4f10ed AG	300	ret = crypto_register_alg(&xeta_alg);
	301	if (ret < 0) {
	302	crypto_unregister_alg(&tea_alg);
	303	crypto_unregister_alg(&xtea_alg);
	304	goto out;
	305	}
	306
1da177e4 LT	307	out:
	308	return ret;
	309	}
	310
	311	static void __exit fini(void)
	312	{
	313	crypto_unregister_alg(&tea_alg);
	314	crypto_unregister_alg(&xtea_alg);
fb4f10ed	315	crypto_unregister_alg(&xeta_alg);
1da177e4 LT	316	}
	317
	318	MODULE_ALIAS("xtea");
fb4f10ed	319	MODULE_ALIAS("xeta");
1da177e4 LT	320
	321	module_init(init);
	322	module_exit(fini);
	323
	324	MODULE_LICENSE("GPL");
fb4f10ed	325	MODULE_DESCRIPTION("TEA, XTEA & XETA Cryptographic Algorithms");