[linux-2.6-block.git] / crypto / seqiv.c

/*
 * seqiv: Sequence Number IV Generator
 *
 * This generator generates an IV based on a sequence number by xoring it
 * with a salt.  This algorithm is mainly useful for CTR and similar modes.
 *
 * Copyright (c) 2007 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/internal/aead.h>
#include <crypto/internal/skcipher.h>
#include <crypto/rng.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/string.h>

struct seqiv_ctx {
	spinlock_t lock;
	u8 salt[] __attribute__ ((aligned(__alignof__(u32))));
};

static void seqiv_complete2(struct skcipher_givcrypt_request *req, int err)
{
	struct ablkcipher_request *subreq = skcipher_givcrypt_reqctx(req);
	struct crypto_ablkcipher *geniv;

	if (err == -EINPROGRESS)
		return;

	if (err)
		goto out;

	geniv = skcipher_givcrypt_reqtfm(req);
	memcpy(req->creq.info, subreq->info, crypto_ablkcipher_ivsize(geniv));

out:
	kfree(subreq->info);
}

static void seqiv_complete(struct crypto_async_request *base, int err)
{
	struct skcipher_givcrypt_request *req = base->data;

	seqiv_complete2(req, err);
	skcipher_givcrypt_complete(req, err);
}

static void seqiv_aead_complete2(struct aead_givcrypt_request *req, int err)
{
	struct aead_request *subreq = aead_givcrypt_reqctx(req);
	struct crypto_aead *geniv;

	if (err == -EINPROGRESS)
		return;

	if (err)
		goto out;

	geniv = aead_givcrypt_reqtfm(req);
	memcpy(req->areq.iv, subreq->iv, crypto_aead_ivsize(geniv));

out:
	kfree(subreq->iv);
}

static void seqiv_aead_complete(struct crypto_async_request *base, int err)
{
	struct aead_givcrypt_request *req = base->data;

	seqiv_aead_complete2(req, err);
	aead_givcrypt_complete(req, err);
}

static void seqiv_geniv(struct seqiv_ctx *ctx, u8 *info, u64 seq,
			unsigned int ivsize)
{
	unsigned int len = ivsize;

	if (ivsize > sizeof(u64)) {
		memset(info, 0, ivsize - sizeof(u64));
		len = sizeof(u64);
	}
	seq = cpu_to_be64(seq);
	memcpy(info + ivsize - len, &seq, len);
	crypto_xor(info, ctx->salt, ivsize);
}

static int seqiv_givencrypt(struct skcipher_givcrypt_request *req)
{
	struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
	struct seqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
	struct ablkcipher_request *subreq = skcipher_givcrypt_reqctx(req);
	crypto_completion_t complete;
	void *data;
	u8 *info;
	unsigned int ivsize;
	int err;

	ablkcipher_request_set_tfm(subreq, skcipher_geniv_cipher(geniv));

	complete = req->creq.base.complete;
	data = req->creq.base.data;
	info = req->creq.info;

	ivsize = crypto_ablkcipher_ivsize(geniv);

	if (unlikely(!IS_ALIGNED((unsigned long)info,
				 crypto_ablkcipher_alignmask(geniv) + 1))) {
		info = kmalloc(ivsize, req->creq.base.flags &
				       CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL:
								  GFP_ATOMIC);
		if (!info)
			return -ENOMEM;

		complete = seqiv_complete;
		data = req;
	}

	ablkcipher_request_set_callback(subreq, req->creq.base.flags, complete,
					data);
	ablkcipher_request_set_crypt(subreq, req->creq.src, req->creq.dst,
				     req->creq.nbytes, info);

	seqiv_geniv(ctx, info, req->seq, ivsize);
	memcpy(req->giv, info, ivsize);

	err = crypto_ablkcipher_encrypt(subreq);
	if (unlikely(info != req->creq.info))
		seqiv_complete2(req, err);
	return err;
}

static int seqiv_aead_givencrypt(struct aead_givcrypt_request *req)
{
	struct crypto_aead *geniv = aead_givcrypt_reqtfm(req);
	struct seqiv_ctx *ctx = crypto_aead_ctx(geniv);
	struct aead_request *areq = &req->areq;
	struct aead_request *subreq = aead_givcrypt_reqctx(req);
	crypto_completion_t complete;
	void *data;
	u8 *info;
	unsigned int ivsize;
	int err;

	aead_request_set_tfm(subreq, aead_geniv_base(geniv));

	complete = areq->base.complete;
	data = areq->base.data;
	info = areq->iv;

	ivsize = crypto_aead_ivsize(geniv);

	if (unlikely(!IS_ALIGNED((unsigned long)info,
				 crypto_aead_alignmask(geniv) + 1))) {
		info = kmalloc(ivsize, areq->base.flags &
				       CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL:
								  GFP_ATOMIC);
		if (!info)
			return -ENOMEM;

		complete = seqiv_aead_complete;
		data = req;
	}

	aead_request_set_callback(subreq, areq->base.flags, complete, data);
	aead_request_set_crypt(subreq, areq->src, areq->dst, areq->cryptlen,
			       info);
	aead_request_set_assoc(subreq, areq->assoc, areq->assoclen);

	seqiv_geniv(ctx, info, req->seq, ivsize);
	memcpy(req->giv, info, ivsize);

	err = crypto_aead_encrypt(subreq);
	if (unlikely(info != areq->iv))
		seqiv_aead_complete2(req, err);
	return err;
}

static int seqiv_givencrypt_first(struct skcipher_givcrypt_request *req)
{
	struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
	struct seqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
	int err = 0;

	spin_lock_bh(&ctx->lock);
	if (crypto_ablkcipher_crt(geniv)->givencrypt != seqiv_givencrypt_first)
		goto unlock;

	crypto_ablkcipher_crt(geniv)->givencrypt = seqiv_givencrypt;
	err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,
				   crypto_ablkcipher_ivsize(geniv));

unlock:
	spin_unlock_bh(&ctx->lock);

	if (err)
		return err;

	return seqiv_givencrypt(req);
}

static int seqiv_aead_givencrypt_first(struct aead_givcrypt_request *req)
{
	struct crypto_aead *geniv = aead_givcrypt_reqtfm(req);
	struct seqiv_ctx *ctx = crypto_aead_ctx(geniv);
	int err = 0;

	spin_lock_bh(&ctx->lock);
	if (crypto_aead_crt(geniv)->givencrypt != seqiv_aead_givencrypt_first)
		goto unlock;

	crypto_aead_crt(geniv)->givencrypt = seqiv_aead_givencrypt;
	err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,
				   crypto_aead_ivsize(geniv));

unlock:
	spin_unlock_bh(&ctx->lock);

	if (err)
		return err;

	return seqiv_aead_givencrypt(req);
}

static int seqiv_init(struct crypto_tfm *tfm)
{
	struct crypto_ablkcipher *geniv = __crypto_ablkcipher_cast(tfm);
	struct seqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);

	spin_lock_init(&ctx->lock);

	tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request);

	return skcipher_geniv_init(tfm);
}

static int seqiv_aead_init(struct crypto_tfm *tfm)
{
	struct crypto_aead *geniv = __crypto_aead_cast(tfm);
	struct seqiv_ctx *ctx = crypto_aead_ctx(geniv);

	spin_lock_init(&ctx->lock);

	tfm->crt_aead.reqsize = sizeof(struct aead_request);

	return aead_geniv_init(tfm);
}

static struct crypto_template seqiv_tmpl;

static struct crypto_instance *seqiv_ablkcipher_alloc(struct rtattr **tb)
{
	struct crypto_instance *inst;

	inst = skcipher_geniv_alloc(&seqiv_tmpl, tb, 0, 0);

	if (IS_ERR(inst))
		goto out;

	inst->alg.cra_ablkcipher.givencrypt = seqiv_givencrypt_first;

	inst->alg.cra_init = seqiv_init;
	inst->alg.cra_exit = skcipher_geniv_exit;

	inst->alg.cra_ctxsize += inst->alg.cra_ablkcipher.ivsize;

out:
	return inst;
}

static struct crypto_instance *seqiv_aead_alloc(struct rtattr **tb)
{
	struct crypto_instance *inst;

	inst = aead_geniv_alloc(&seqiv_tmpl, tb, 0, 0);

	if (IS_ERR(inst))
		goto out;

	inst->alg.cra_aead.givencrypt = seqiv_aead_givencrypt_first;

	inst->alg.cra_init = seqiv_aead_init;
	inst->alg.cra_exit = aead_geniv_exit;

	inst->alg.cra_ctxsize = inst->alg.cra_aead.ivsize;

out:
	return inst;
}

static struct crypto_instance *seqiv_alloc(struct rtattr **tb)
{
	struct crypto_attr_type *algt;
	struct crypto_instance *inst;
	int err;

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

	err = crypto_get_default_rng();
	if (err)
		return ERR_PTR(err);

	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK)
		inst = seqiv_ablkcipher_alloc(tb);
	else
		inst = seqiv_aead_alloc(tb);

	if (IS_ERR(inst))
		goto put_rng;

	inst->alg.cra_alignmask |= __alignof__(u32) - 1;
	inst->alg.cra_ctxsize += sizeof(struct seqiv_ctx);

out:
	return inst;

put_rng:
	crypto_put_default_rng();
	goto out;
}

static void seqiv_free(struct crypto_instance *inst)
{
	if ((inst->alg.cra_flags ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK)
		skcipher_geniv_free(inst);
	else
		aead_geniv_free(inst);
	crypto_put_default_rng();
}

static struct crypto_template seqiv_tmpl = {
	.name = "seqiv",
	.alloc = seqiv_alloc,
	.free = seqiv_free,
	.module = THIS_MODULE,
};

static int __init seqiv_module_init(void)
{
	return crypto_register_template(&seqiv_tmpl);
}

static void __exit seqiv_module_exit(void)
{
	crypto_unregister_template(&seqiv_tmpl);
}

module_init(seqiv_module_init);
module_exit(seqiv_module_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Sequence Number IV Generator");
Commit	Line	Data
0a270321 HX	1	/*
	2	* seqiv: Sequence Number IV Generator
	3	*
	4	* This generator generates an IV based on a sequence number by xoring it
	5	* with a salt. This algorithm is mainly useful for CTR and similar modes.
	6	*
	7	* Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the Free
	11	* Software Foundation; either version 2 of the License, or (at your option)
	12	* any later version.
	13	*
	14	*/
	15
14df4d80	16	#include <crypto/internal/aead.h>
0a270321	17	#include <crypto/internal/skcipher.h>
a0f000ec	18	#include <crypto/rng.h>
0a270321 HX	19	#include <linux/err.h>
	20	#include <linux/init.h>
	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
5a0e3ad6	23	#include <linux/slab.h>
0a270321 HX	24	#include <linux/spinlock.h>
	25	#include <linux/string.h>
	26
	27	struct seqiv_ctx {
	28	spinlock_t lock;
	29	u8 salt[] __attribute__ ((aligned(__alignof__(u32))));
	30	};
	31
	32	static void seqiv_complete2(struct skcipher_givcrypt_request *req, int err)
	33	{
	34	struct ablkcipher_request *subreq = skcipher_givcrypt_reqctx(req);
	35	struct crypto_ablkcipher *geniv;
	36
	37	if (err == -EINPROGRESS)
	38	return;
	39
	40	if (err)
	41	goto out;
	42
	43	geniv = skcipher_givcrypt_reqtfm(req);
	44	memcpy(req->creq.info, subreq->info, crypto_ablkcipher_ivsize(geniv));
	45
	46	out:
	47	kfree(subreq->info);
	48	}
	49
	50	static void seqiv_complete(struct crypto_async_request *base, int err)
	51	{
	52	struct skcipher_givcrypt_request *req = base->data;
	53
	54	seqiv_complete2(req, err);
	55	skcipher_givcrypt_complete(req, err);
	56	}
	57
14df4d80 HX	58	static void seqiv_aead_complete2(struct aead_givcrypt_request *req, int err)
	59	{
	60	struct aead_request *subreq = aead_givcrypt_reqctx(req);
	61	struct crypto_aead *geniv;
	62
	63	if (err == -EINPROGRESS)
	64	return;
	65
	66	if (err)
	67	goto out;
	68
	69	geniv = aead_givcrypt_reqtfm(req);
	70	memcpy(req->areq.iv, subreq->iv, crypto_aead_ivsize(geniv));
	71
	72	out:
	73	kfree(subreq->iv);
	74	}
	75
	76	static void seqiv_aead_complete(struct crypto_async_request *base, int err)
	77	{
	78	struct aead_givcrypt_request *req = base->data;
	79
	80	seqiv_aead_complete2(req, err);
	81	aead_givcrypt_complete(req, err);
	82	}
	83
	84	static void seqiv_geniv(struct seqiv_ctx ctx, u8 info, u64 seq,
	85	unsigned int ivsize)
	86	{
	87	unsigned int len = ivsize;
	88
	89	if (ivsize > sizeof(u64)) {
	90	memset(info, 0, ivsize - sizeof(u64));
	91	len = sizeof(u64);
	92	}
	93	seq = cpu_to_be64(seq);
	94	memcpy(info + ivsize - len, &seq, len);
	95	crypto_xor(info, ctx->salt, ivsize);
	96	}
	97
0a270321 HX	98	static int seqiv_givencrypt(struct skcipher_givcrypt_request *req)
	99	{
	100	struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
	101	struct seqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
	102	struct ablkcipher_request *subreq = skcipher_givcrypt_reqctx(req);
	103	crypto_completion_t complete;
	104	void *data;
	105	u8 *info;
0a270321	106	unsigned int ivsize;
0a270321 HX	107	int err;
	108
	109	ablkcipher_request_set_tfm(subreq, skcipher_geniv_cipher(geniv));
	110
	111	complete = req->creq.base.complete;
	112	data = req->creq.base.data;
	113	info = req->creq.info;
	114
	115	ivsize = crypto_ablkcipher_ivsize(geniv);
	116
	117	if (unlikely(!IS_ALIGNED((unsigned long)info,
	118	crypto_ablkcipher_alignmask(geniv) + 1))) {
	119	info = kmalloc(ivsize, req->creq.base.flags &
	120	CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL:
	121	GFP_ATOMIC);
	122	if (!info)
	123	return -ENOMEM;
	124
	125	complete = seqiv_complete;
	126	data = req;
	127	}
	128
	129	ablkcipher_request_set_callback(subreq, req->creq.base.flags, complete,
	130	data);
	131	ablkcipher_request_set_crypt(subreq, req->creq.src, req->creq.dst,
	132	req->creq.nbytes, info);
	133
14df4d80	134	seqiv_geniv(ctx, info, req->seq, ivsize);
0a270321 HX	135	memcpy(req->giv, info, ivsize);
	136
	137	err = crypto_ablkcipher_encrypt(subreq);
	138	if (unlikely(info != req->creq.info))
	139	seqiv_complete2(req, err);
	140	return err;
	141	}
	142
14df4d80 HX	143	static int seqiv_aead_givencrypt(struct aead_givcrypt_request *req)
	144	{
	145	struct crypto_aead *geniv = aead_givcrypt_reqtfm(req);
	146	struct seqiv_ctx *ctx = crypto_aead_ctx(geniv);
	147	struct aead_request *areq = &req->areq;
	148	struct aead_request *subreq = aead_givcrypt_reqctx(req);
	149	crypto_completion_t complete;
	150	void *data;
	151	u8 *info;
	152	unsigned int ivsize;
	153	int err;
	154
	155	aead_request_set_tfm(subreq, aead_geniv_base(geniv));
	156
	157	complete = areq->base.complete;
	158	data = areq->base.data;
	159	info = areq->iv;
	160
	161	ivsize = crypto_aead_ivsize(geniv);
	162
	163	if (unlikely(!IS_ALIGNED((unsigned long)info,
	164	crypto_aead_alignmask(geniv) + 1))) {
	165	info = kmalloc(ivsize, areq->base.flags &
	166	CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL:
	167	GFP_ATOMIC);
	168	if (!info)
	169	return -ENOMEM;
	170
	171	complete = seqiv_aead_complete;
	172	data = req;
	173	}
	174
	175	aead_request_set_callback(subreq, areq->base.flags, complete, data);
	176	aead_request_set_crypt(subreq, areq->src, areq->dst, areq->cryptlen,
	177	info);
	178	aead_request_set_assoc(subreq, areq->assoc, areq->assoclen);
	179
	180	seqiv_geniv(ctx, info, req->seq, ivsize);
	181	memcpy(req->giv, info, ivsize);
	182
	183	err = crypto_aead_encrypt(subreq);
	184	if (unlikely(info != areq->iv))
	185	seqiv_aead_complete2(req, err);
	186	return err;
	187	}
	188
0a270321 HX	189	static int seqiv_givencrypt_first(struct skcipher_givcrypt_request *req)
	190	{
	191	struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
	192	struct seqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
a0f000ec	193	int err = 0;
0a270321 HX	194
	195	spin_lock_bh(&ctx->lock);
	196	if (crypto_ablkcipher_crt(geniv)->givencrypt != seqiv_givencrypt_first)
	197	goto unlock;
	198
	199	crypto_ablkcipher_crt(geniv)->givencrypt = seqiv_givencrypt;
a0f000ec HX	200	err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,
a0f000ec HX	201	crypto_ablkcipher_ivsize(geniv));
0a270321 HX	202
	203	unlock:
	204	spin_unlock_bh(&ctx->lock);
	205
a0f000ec HX	206	if (err)
	207	return err;
	208
0a270321 HX	209	return seqiv_givencrypt(req);
	210	}
	211
14df4d80 HX	212	static int seqiv_aead_givencrypt_first(struct aead_givcrypt_request *req)
	213	{
	214	struct crypto_aead *geniv = aead_givcrypt_reqtfm(req);
	215	struct seqiv_ctx *ctx = crypto_aead_ctx(geniv);
a0f000ec	216	int err = 0;
14df4d80 HX	217
	218	spin_lock_bh(&ctx->lock);
	219	if (crypto_aead_crt(geniv)->givencrypt != seqiv_aead_givencrypt_first)
	220	goto unlock;
	221
	222	crypto_aead_crt(geniv)->givencrypt = seqiv_aead_givencrypt;
a0f000ec HX	223	err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,
a0f000ec HX	224	crypto_aead_ivsize(geniv));
14df4d80 HX	225
	226	unlock:
	227	spin_unlock_bh(&ctx->lock);
	228
a0f000ec HX	229	if (err)
	230	return err;
	231
14df4d80 HX	232	return seqiv_aead_givencrypt(req);
	233	}
	234
0a270321 HX	235	static int seqiv_init(struct crypto_tfm *tfm)
	236	{
	237	struct crypto_ablkcipher *geniv = __crypto_ablkcipher_cast(tfm);
	238	struct seqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
	239
	240	spin_lock_init(&ctx->lock);
	241
	242	tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request);
	243
	244	return skcipher_geniv_init(tfm);
	245	}
	246
14df4d80 HX	247	static int seqiv_aead_init(struct crypto_tfm *tfm)
	248	{
	249	struct crypto_aead *geniv = __crypto_aead_cast(tfm);
	250	struct seqiv_ctx *ctx = crypto_aead_ctx(geniv);
	251
	252	spin_lock_init(&ctx->lock);
	253
	254	tfm->crt_aead.reqsize = sizeof(struct aead_request);
	255
	256	return aead_geniv_init(tfm);
	257	}
	258
0a270321 HX	259	static struct crypto_template seqiv_tmpl;
0a270321 HX	260
14df4d80	261	static struct crypto_instance seqiv_ablkcipher_alloc(struct rtattr *tb)
0a270321 HX	262	{
	263	struct crypto_instance *inst;
	264
	265	inst = skcipher_geniv_alloc(&seqiv_tmpl, tb, 0, 0);
14df4d80	266
0a270321 HX	267	if (IS_ERR(inst))
	268	goto out;
	269
	270	inst->alg.cra_ablkcipher.givencrypt = seqiv_givencrypt_first;
	271
	272	inst->alg.cra_init = seqiv_init;
	273	inst->alg.cra_exit = skcipher_geniv_exit;
	274
0a270321 HX	275	inst->alg.cra_ctxsize += inst->alg.cra_ablkcipher.ivsize;
	276
	277	out:
	278	return inst;
	279	}
	280
14df4d80 HX	281	static struct crypto_instance seqiv_aead_alloc(struct rtattr *tb)
	282	{
	283	struct crypto_instance *inst;
	284
	285	inst = aead_geniv_alloc(&seqiv_tmpl, tb, 0, 0);
	286
	287	if (IS_ERR(inst))
	288	goto out;
	289
	290	inst->alg.cra_aead.givencrypt = seqiv_aead_givencrypt_first;
	291
	292	inst->alg.cra_init = seqiv_aead_init;
	293	inst->alg.cra_exit = aead_geniv_exit;
	294
	295	inst->alg.cra_ctxsize = inst->alg.cra_aead.ivsize;
	296
	297	out:
	298	return inst;
	299	}
	300
	301	static struct crypto_instance seqiv_alloc(struct rtattr *tb)
	302	{
	303	struct crypto_attr_type *algt;
	304	struct crypto_instance *inst;
	305	int err;
	306
	307	algt = crypto_get_attr_type(tb);
	308	err = PTR_ERR(algt);
	309	if (IS_ERR(algt))
	310	return ERR_PTR(err);
	311
a0f000ec HX	312	err = crypto_get_default_rng();
	313	if (err)
	314	return ERR_PTR(err);
	315
14df4d80 HX	316	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK)
	317	inst = seqiv_ablkcipher_alloc(tb);
	318	else
	319	inst = seqiv_aead_alloc(tb);
	320
	321	if (IS_ERR(inst))
a0f000ec	322	goto put_rng;
14df4d80 HX	323
	324	inst->alg.cra_alignmask \|= __alignof__(u32) - 1;
	325	inst->alg.cra_ctxsize += sizeof(struct seqiv_ctx);
	326
	327	out:
	328	return inst;
a0f000ec HX	329
	330	put_rng:
	331	crypto_put_default_rng();
	332	goto out;
14df4d80 HX	333	}
	334
	335	static void seqiv_free(struct crypto_instance *inst)
	336	{
	337	if ((inst->alg.cra_flags ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK)
	338	skcipher_geniv_free(inst);
	339	else
	340	aead_geniv_free(inst);
a0f000ec	341	crypto_put_default_rng();
14df4d80 HX	342	}
14df4d80 HX	343
0a270321 HX	344	static struct crypto_template seqiv_tmpl = {
	345	.name = "seqiv",
	346	.alloc = seqiv_alloc,
14df4d80	347	.free = seqiv_free,
0a270321 HX	348	.module = THIS_MODULE,
	349	};
	350
	351	static int __init seqiv_module_init(void)
	352	{
	353	return crypto_register_template(&seqiv_tmpl);
	354	}
	355
	356	static void __exit seqiv_module_exit(void)
	357	{
	358	crypto_unregister_template(&seqiv_tmpl);
	359	}
	360
	361	module_init(seqiv_module_init);
	362	module_exit(seqiv_module_exit);
	363
	364	MODULE_LICENSE("GPL");
	365	MODULE_DESCRIPTION("Sequence Number IV Generator");