[thirdparty/kernel/stable.git] / crypto / pcbc.c

/*
 * PCBC: Propagating Cipher Block Chaining mode
 *
 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * Derived from cbc.c
 * - Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
 *
 * 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 <crypto/internal/skcipher.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/compiler.h>

struct crypto_pcbc_ctx {
	struct crypto_cipher *child;
};

static int crypto_pcbc_setkey(struct crypto_skcipher *parent, const u8 *key,
			      unsigned int keylen)
{
	struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(parent);
	struct crypto_cipher *child = ctx->child;
	int err;

	crypto_cipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
	crypto_cipher_set_flags(child, crypto_skcipher_get_flags(parent) &
				       CRYPTO_TFM_REQ_MASK);
	err = crypto_cipher_setkey(child, key, keylen);
	crypto_skcipher_set_flags(parent, crypto_cipher_get_flags(child) &
					  CRYPTO_TFM_RES_MASK);
	return err;
}

static int crypto_pcbc_encrypt_segment(struct skcipher_request *req,
				       struct skcipher_walk *walk,
				       struct crypto_cipher *tfm)
{
	int bsize = crypto_cipher_blocksize(tfm);
	unsigned int nbytes = walk->nbytes;
	u8 *src = walk->src.virt.addr;
	u8 *dst = walk->dst.virt.addr;
	u8 * const iv = walk->iv;

	do {
		crypto_xor(iv, src, bsize);
		crypto_cipher_encrypt_one(tfm, dst, iv);
		crypto_xor_cpy(iv, dst, src, bsize);

		src += bsize;
		dst += bsize;
	} while ((nbytes -= bsize) >= bsize);

	return nbytes;
}

static int crypto_pcbc_encrypt_inplace(struct skcipher_request *req,
				       struct skcipher_walk *walk,
				       struct crypto_cipher *tfm)
{
	int bsize = crypto_cipher_blocksize(tfm);
	unsigned int nbytes = walk->nbytes;
	u8 *src = walk->src.virt.addr;
	u8 * const iv = walk->iv;
	u8 tmpbuf[MAX_CIPHER_BLOCKSIZE];

	do {
		memcpy(tmpbuf, src, bsize);
		crypto_xor(iv, src, bsize);
		crypto_cipher_encrypt_one(tfm, src, iv);
		crypto_xor_cpy(iv, tmpbuf, src, bsize);

		src += bsize;
	} while ((nbytes -= bsize) >= bsize);

	return nbytes;
}

static int crypto_pcbc_encrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct crypto_cipher *child = ctx->child;
	struct skcipher_walk walk;
	unsigned int nbytes;
	int err;

	err = skcipher_walk_virt(&walk, req, false);

	while ((nbytes = walk.nbytes)) {
		if (walk.src.virt.addr == walk.dst.virt.addr)
			nbytes = crypto_pcbc_encrypt_inplace(req, &walk,
							     child);
		else
			nbytes = crypto_pcbc_encrypt_segment(req, &walk,
							     child);
		err = skcipher_walk_done(&walk, nbytes);
	}

	return err;
}

static int crypto_pcbc_decrypt_segment(struct skcipher_request *req,
				       struct skcipher_walk *walk,
				       struct crypto_cipher *tfm)
{
	int bsize = crypto_cipher_blocksize(tfm);
	unsigned int nbytes = walk->nbytes;
	u8 *src = walk->src.virt.addr;
	u8 *dst = walk->dst.virt.addr;
	u8 * const iv = walk->iv;

	do {
		crypto_cipher_decrypt_one(tfm, dst, src);
		crypto_xor(dst, iv, bsize);
		crypto_xor_cpy(iv, dst, src, bsize);

		src += bsize;
		dst += bsize;
	} while ((nbytes -= bsize) >= bsize);

	return nbytes;
}

static int crypto_pcbc_decrypt_inplace(struct skcipher_request *req,
				       struct skcipher_walk *walk,
				       struct crypto_cipher *tfm)
{
	int bsize = crypto_cipher_blocksize(tfm);
	unsigned int nbytes = walk->nbytes;
	u8 *src = walk->src.virt.addr;
	u8 * const iv = walk->iv;
	u8 tmpbuf[MAX_CIPHER_BLOCKSIZE] __aligned(__alignof__(u32));

	do {
		memcpy(tmpbuf, src, bsize);
		crypto_cipher_decrypt_one(tfm, src, src);
		crypto_xor(src, iv, bsize);
		crypto_xor_cpy(iv, src, tmpbuf, bsize);

		src += bsize;
	} while ((nbytes -= bsize) >= bsize);

	return nbytes;
}

static int crypto_pcbc_decrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct crypto_cipher *child = ctx->child;
	struct skcipher_walk walk;
	unsigned int nbytes;
	int err;

	err = skcipher_walk_virt(&walk, req, false);

	while ((nbytes = walk.nbytes)) {
		if (walk.src.virt.addr == walk.dst.virt.addr)
			nbytes = crypto_pcbc_decrypt_inplace(req, &walk,
							     child);
		else
			nbytes = crypto_pcbc_decrypt_segment(req, &walk,
							     child);
		err = skcipher_walk_done(&walk, nbytes);
	}

	return err;
}

static int crypto_pcbc_init_tfm(struct crypto_skcipher *tfm)
{
	struct skcipher_instance *inst = skcipher_alg_instance(tfm);
	struct crypto_spawn *spawn = skcipher_instance_ctx(inst);
	struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct crypto_cipher *cipher;

	cipher = crypto_spawn_cipher(spawn);
	if (IS_ERR(cipher))
		return PTR_ERR(cipher);

	ctx->child = cipher;
	return 0;
}

static void crypto_pcbc_exit_tfm(struct crypto_skcipher *tfm)
{
	struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm);

	crypto_free_cipher(ctx->child);
}

static void crypto_pcbc_free(struct skcipher_instance *inst)
{
	crypto_drop_skcipher(skcipher_instance_ctx(inst));
	kfree(inst);
}

static int crypto_pcbc_create(struct crypto_template *tmpl, struct rtattr **tb)
{
	struct skcipher_instance *inst;
	struct crypto_attr_type *algt;
	struct crypto_spawn *spawn;
	struct crypto_alg *alg;
	int err;

	algt = crypto_get_attr_type(tb);
	if (IS_ERR(algt))
		return PTR_ERR(algt);

	if (((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask) &
	    ~CRYPTO_ALG_INTERNAL)
		return -EINVAL;

	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
	if (!inst)
		return -ENOMEM;

	alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER |
				      (algt->type & CRYPTO_ALG_INTERNAL),
				  CRYPTO_ALG_TYPE_MASK |
				  (algt->mask & CRYPTO_ALG_INTERNAL));
	err = PTR_ERR(alg);
	if (IS_ERR(alg))
		goto err_free_inst;

	spawn = skcipher_instance_ctx(inst);
	err = crypto_init_spawn(spawn, alg, skcipher_crypto_instance(inst),
				CRYPTO_ALG_TYPE_MASK);
	if (err)
		goto err_put_alg;

	err = crypto_inst_setname(skcipher_crypto_instance(inst), "pcbc", alg);
	if (err)
		goto err_drop_spawn;

	inst->alg.base.cra_flags = alg->cra_flags & CRYPTO_ALG_INTERNAL;
	inst->alg.base.cra_priority = alg->cra_priority;
	inst->alg.base.cra_blocksize = alg->cra_blocksize;
	inst->alg.base.cra_alignmask = alg->cra_alignmask;

	inst->alg.ivsize = alg->cra_blocksize;
	inst->alg.min_keysize = alg->cra_cipher.cia_min_keysize;
	inst->alg.max_keysize = alg->cra_cipher.cia_max_keysize;

	inst->alg.base.cra_ctxsize = sizeof(struct crypto_pcbc_ctx);

	inst->alg.init = crypto_pcbc_init_tfm;
	inst->alg.exit = crypto_pcbc_exit_tfm;

	inst->alg.setkey = crypto_pcbc_setkey;
	inst->alg.encrypt = crypto_pcbc_encrypt;
	inst->alg.decrypt = crypto_pcbc_decrypt;

	inst->free = crypto_pcbc_free;

	err = skcipher_register_instance(tmpl, inst);
	if (err)
		goto err_drop_spawn;
	crypto_mod_put(alg);

out:
	return err;

err_drop_spawn:
	crypto_drop_spawn(spawn);
err_put_alg:
	crypto_mod_put(alg);
err_free_inst:
	kfree(inst);
	goto out;
}

static struct crypto_template crypto_pcbc_tmpl = {
	.name = "pcbc",
	.create = crypto_pcbc_create,
	.module = THIS_MODULE,
};

static int __init crypto_pcbc_module_init(void)
{
	return crypto_register_template(&crypto_pcbc_tmpl);
}

static void __exit crypto_pcbc_module_exit(void)
{
	crypto_unregister_template(&crypto_pcbc_tmpl);
}

module_init(crypto_pcbc_module_init);
module_exit(crypto_pcbc_module_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PCBC block cipher algorithm");
MODULE_ALIAS_CRYPTO("pcbc");
Commit	Line	Data
91652be5 DH	1	/*
	2	* PCBC: Propagating Cipher Block Chaining mode
	3	*
	4	* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
	5	* Written by David Howells (dhowells@redhat.com)
	6	*
	7	* Derived from cbc.c
	8	* - Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the Free
	12	* Software Foundation; either version 2 of the License, or (at your option)
	13	* any later version.
	14	*
	15	*/
	16
6650c4de	17	#include <crypto/algapi.h>
043a4400	18	#include <crypto/internal/skcipher.h>
91652be5 DH	19	#include <linux/err.h>
	20	#include <linux/init.h>
	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
91652be5	23	#include <linux/slab.h>
d8c34b94	24	#include <linux/compiler.h>
91652be5 DH	25
	26	struct crypto_pcbc_ctx {
	27	struct crypto_cipher *child;
91652be5 DH	28	};
91652be5 DH	29
043a4400	30	static int crypto_pcbc_setkey(struct crypto_skcipher parent, const u8 key,
91652be5 DH	31	unsigned int keylen)
91652be5 DH	32	{
043a4400	33	struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(parent);
91652be5 DH	34	struct crypto_cipher *child = ctx->child;
	35	int err;
	36
	37	crypto_cipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
043a4400 HX	38	crypto_cipher_set_flags(child, crypto_skcipher_get_flags(parent) &
043a4400 HX	39	CRYPTO_TFM_REQ_MASK);
91652be5	40	err = crypto_cipher_setkey(child, key, keylen);
043a4400 HX	41	crypto_skcipher_set_flags(parent, crypto_cipher_get_flags(child) &
043a4400 HX	42	CRYPTO_TFM_RES_MASK);
91652be5 DH	43	return err;
	44	}
	45
043a4400 HX	46	static int crypto_pcbc_encrypt_segment(struct skcipher_request *req,
043a4400 HX	47	struct skcipher_walk *walk,
d0b9007a	48	struct crypto_cipher *tfm)
91652be5	49	{
91652be5 DH	50	int bsize = crypto_cipher_blocksize(tfm);
	51	unsigned int nbytes = walk->nbytes;
	52	u8 *src = walk->src.virt.addr;
	53	u8 *dst = walk->dst.virt.addr;
bb1ae0aa	54	u8 * const iv = walk->iv;
91652be5 DH	55
91652be5 DH	56	do {
d0b9007a	57	crypto_xor(iv, src, bsize);
043a4400	58	crypto_cipher_encrypt_one(tfm, dst, iv);
45fe93df	59	crypto_xor_cpy(iv, dst, src, bsize);
91652be5 DH	60
	61	src += bsize;
	62	dst += bsize;
	63	} while ((nbytes -= bsize) >= bsize);
	64
	65	return nbytes;
	66	}
	67
043a4400 HX	68	static int crypto_pcbc_encrypt_inplace(struct skcipher_request *req,
043a4400 HX	69	struct skcipher_walk *walk,
d0b9007a	70	struct crypto_cipher *tfm)
91652be5	71	{
91652be5 DH	72	int bsize = crypto_cipher_blocksize(tfm);
	73	unsigned int nbytes = walk->nbytes;
	74	u8 *src = walk->src.virt.addr;
bb1ae0aa	75	u8 * const iv = walk->iv;
6650c4de	76	u8 tmpbuf[MAX_CIPHER_BLOCKSIZE];
91652be5 DH	77
	78	do {
	79	memcpy(tmpbuf, src, bsize);
d0b9007a	80	crypto_xor(iv, src, bsize);
043a4400	81	crypto_cipher_encrypt_one(tfm, src, iv);
45fe93df	82	crypto_xor_cpy(iv, tmpbuf, src, bsize);
91652be5 DH	83
	84	src += bsize;
	85	} while ((nbytes -= bsize) >= bsize);
	86
91652be5 DH	87	return nbytes;
	88	}
	89
043a4400	90	static int crypto_pcbc_encrypt(struct skcipher_request *req)
91652be5	91	{
043a4400 HX	92	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
043a4400 HX	93	struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm);
91652be5	94	struct crypto_cipher *child = ctx->child;
043a4400 HX	95	struct skcipher_walk walk;
043a4400 HX	96	unsigned int nbytes;
91652be5 DH	97	int err;
91652be5 DH	98
043a4400	99	err = skcipher_walk_virt(&walk, req, false);
91652be5 DH	100
	101	while ((nbytes = walk.nbytes)) {
	102	if (walk.src.virt.addr == walk.dst.virt.addr)
043a4400	103	nbytes = crypto_pcbc_encrypt_inplace(req, &walk,
d0b9007a	104	child);
91652be5	105	else
043a4400	106	nbytes = crypto_pcbc_encrypt_segment(req, &walk,
d0b9007a	107	child);
043a4400	108	err = skcipher_walk_done(&walk, nbytes);
91652be5 DH	109	}
	110
	111	return err;
	112	}
	113
043a4400 HX	114	static int crypto_pcbc_decrypt_segment(struct skcipher_request *req,
043a4400 HX	115	struct skcipher_walk *walk,
d0b9007a	116	struct crypto_cipher *tfm)
91652be5	117	{
91652be5 DH	118	int bsize = crypto_cipher_blocksize(tfm);
	119	unsigned int nbytes = walk->nbytes;
	120	u8 *src = walk->src.virt.addr;
	121	u8 *dst = walk->dst.virt.addr;
bb1ae0aa	122	u8 * const iv = walk->iv;
91652be5 DH	123
91652be5 DH	124	do {
043a4400	125	crypto_cipher_decrypt_one(tfm, dst, src);
d0b9007a	126	crypto_xor(dst, iv, bsize);
45fe93df	127	crypto_xor_cpy(iv, dst, src, bsize);
91652be5 DH	128
	129	src += bsize;
	130	dst += bsize;
	131	} while ((nbytes -= bsize) >= bsize);
	132
91652be5 DH	133	return nbytes;
	134	}
	135
043a4400 HX	136	static int crypto_pcbc_decrypt_inplace(struct skcipher_request *req,
043a4400 HX	137	struct skcipher_walk *walk,
d0b9007a	138	struct crypto_cipher *tfm)
91652be5	139	{
91652be5 DH	140	int bsize = crypto_cipher_blocksize(tfm);
	141	unsigned int nbytes = walk->nbytes;
	142	u8 *src = walk->src.virt.addr;
bb1ae0aa	143	u8 * const iv = walk->iv;
6650c4de	144	u8 tmpbuf[MAX_CIPHER_BLOCKSIZE] __aligned(__alignof__(u32));
91652be5 DH	145
	146	do {
	147	memcpy(tmpbuf, src, bsize);
043a4400	148	crypto_cipher_decrypt_one(tfm, src, src);
d0b9007a	149	crypto_xor(src, iv, bsize);
45fe93df	150	crypto_xor_cpy(iv, src, tmpbuf, bsize);
91652be5 DH	151
	152	src += bsize;
	153	} while ((nbytes -= bsize) >= bsize);
	154
91652be5 DH	155	return nbytes;
	156	}
	157
043a4400	158	static int crypto_pcbc_decrypt(struct skcipher_request *req)
91652be5	159	{
043a4400 HX	160	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
043a4400 HX	161	struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm);
91652be5	162	struct crypto_cipher *child = ctx->child;
043a4400 HX	163	struct skcipher_walk walk;
043a4400 HX	164	unsigned int nbytes;
91652be5 DH	165	int err;
91652be5 DH	166
043a4400	167	err = skcipher_walk_virt(&walk, req, false);
91652be5 DH	168
	169	while ((nbytes = walk.nbytes)) {
	170	if (walk.src.virt.addr == walk.dst.virt.addr)
043a4400	171	nbytes = crypto_pcbc_decrypt_inplace(req, &walk,
d0b9007a	172	child);
91652be5	173	else
043a4400	174	nbytes = crypto_pcbc_decrypt_segment(req, &walk,
d0b9007a	175	child);
043a4400	176	err = skcipher_walk_done(&walk, nbytes);
91652be5 DH	177	}
	178
	179	return err;
	180	}
	181
043a4400	182	static int crypto_pcbc_init_tfm(struct crypto_skcipher *tfm)
91652be5	183	{
043a4400 HX	184	struct skcipher_instance *inst = skcipher_alg_instance(tfm);
	185	struct crypto_spawn *spawn = skcipher_instance_ctx(inst);
	186	struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm);
2e306ee0	187	struct crypto_cipher *cipher;
91652be5	188
2e306ee0 HX	189	cipher = crypto_spawn_cipher(spawn);
	190	if (IS_ERR(cipher))
	191	return PTR_ERR(cipher);
91652be5	192
2e306ee0	193	ctx->child = cipher;
91652be5 DH	194	return 0;
	195	}
	196
043a4400	197	static void crypto_pcbc_exit_tfm(struct crypto_skcipher *tfm)
91652be5	198	{
043a4400 HX	199	struct crypto_pcbc_ctx *ctx = crypto_skcipher_ctx(tfm);
043a4400 HX	200
91652be5 DH	201	crypto_free_cipher(ctx->child);
	202	}
	203
043a4400 HX	204	static void crypto_pcbc_free(struct skcipher_instance *inst)
	205	{
	206	crypto_drop_skcipher(skcipher_instance_ctx(inst));
	207	kfree(inst);
	208	}
	209
	210	static int crypto_pcbc_create(struct crypto_template tmpl, struct rtattr *tb)
91652be5	211	{
043a4400 HX	212	struct skcipher_instance *inst;
	213	struct crypto_attr_type *algt;
	214	struct crypto_spawn *spawn;
91652be5	215	struct crypto_alg *alg;
ebc610e5 HX	216	int err;
ebc610e5 HX	217
043a4400 HX	218	algt = crypto_get_attr_type(tb);
	219	if (IS_ERR(algt))
	220	return PTR_ERR(algt);
	221
	222	if (((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask) &
	223	~CRYPTO_ALG_INTERNAL)
	224	return -EINVAL;
91652be5	225
043a4400 HX	226	inst = kzalloc(sizeof(inst) + sizeof(spawn), GFP_KERNEL);
	227	if (!inst)
	228	return -ENOMEM;
	229
	230	alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER \|
	231	(algt->type & CRYPTO_ALG_INTERNAL),
	232	CRYPTO_ALG_TYPE_MASK \|
	233	(algt->mask & CRYPTO_ALG_INTERNAL));
	234	err = PTR_ERR(alg);
91652be5	235	if (IS_ERR(alg))
043a4400 HX	236	goto err_free_inst;
	237
	238	spawn = skcipher_instance_ctx(inst);
	239	err = crypto_init_spawn(spawn, alg, skcipher_crypto_instance(inst),
	240	CRYPTO_ALG_TYPE_MASK);
043a4400	241	if (err)
2f946051	242	goto err_put_alg;
91652be5	243
043a4400 HX	244	err = crypto_inst_setname(skcipher_crypto_instance(inst), "pcbc", alg);
	245	if (err)
	246	goto err_drop_spawn;
91652be5	247
043a4400 HX	248	inst->alg.base.cra_flags = alg->cra_flags & CRYPTO_ALG_INTERNAL;
	249	inst->alg.base.cra_priority = alg->cra_priority;
	250	inst->alg.base.cra_blocksize = alg->cra_blocksize;
	251	inst->alg.base.cra_alignmask = alg->cra_alignmask;
91652be5	252
043a4400 HX	253	inst->alg.ivsize = alg->cra_blocksize;
	254	inst->alg.min_keysize = alg->cra_cipher.cia_min_keysize;
	255	inst->alg.max_keysize = alg->cra_cipher.cia_max_keysize;
91652be5	256
043a4400	257	inst->alg.base.cra_ctxsize = sizeof(struct crypto_pcbc_ctx);
91652be5	258
043a4400 HX	259	inst->alg.init = crypto_pcbc_init_tfm;
043a4400 HX	260	inst->alg.exit = crypto_pcbc_exit_tfm;
91652be5	261
043a4400 HX	262	inst->alg.setkey = crypto_pcbc_setkey;
	263	inst->alg.encrypt = crypto_pcbc_encrypt;
	264	inst->alg.decrypt = crypto_pcbc_decrypt;
91652be5	265
043a4400	266	inst->free = crypto_pcbc_free;
91652be5	267
043a4400 HX	268	err = skcipher_register_instance(tmpl, inst);
	269	if (err)
	270	goto err_drop_spawn;
2f946051	271	crypto_mod_put(alg);
043a4400 HX	272
	273	out:
	274	return err;
	275
	276	err_drop_spawn:
	277	crypto_drop_spawn(spawn);
2f946051 PB	278	err_put_alg:
2f946051 PB	279	crypto_mod_put(alg);
043a4400	280	err_free_inst:
91652be5	281	kfree(inst);
043a4400	282	goto out;
91652be5 DH	283	}
	284
	285	static struct crypto_template crypto_pcbc_tmpl = {
	286	.name = "pcbc",
043a4400	287	.create = crypto_pcbc_create,
91652be5 DH	288	.module = THIS_MODULE,
	289	};
	290
	291	static int __init crypto_pcbc_module_init(void)
	292	{
	293	return crypto_register_template(&crypto_pcbc_tmpl);
	294	}
	295
	296	static void __exit crypto_pcbc_module_exit(void)
	297	{
	298	crypto_unregister_template(&crypto_pcbc_tmpl);
	299	}
	300
	301	module_init(crypto_pcbc_module_init);
	302	module_exit(crypto_pcbc_module_exit);
	303
	304	MODULE_LICENSE("GPL");
	305	MODULE_DESCRIPTION("PCBC block cipher algorithm");
4943ba16	306	MODULE_ALIAS_CRYPTO("pcbc");