[linux-block.git] / crypto / simd.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Shared crypto simd helpers
 *
 * Copyright (c) 2012 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
 * Copyright (c) 2016 Herbert Xu <herbert@gondor.apana.org.au>
 * Copyright (c) 2019 Google LLC
 *
 * Based on aesni-intel_glue.c by:
 *  Copyright (C) 2008, Intel Corp.
 *    Author: Huang Ying <ying.huang@intel.com>
 */

/*
 * Shared crypto SIMD helpers.  These functions dynamically create and register
 * an skcipher or AEAD algorithm that wraps another, internal algorithm.  The
 * wrapper ensures that the internal algorithm is only executed in a context
 * where SIMD instructions are usable, i.e. where may_use_simd() returns true.
 * If SIMD is already usable, the wrapper directly calls the internal algorithm.
 * Otherwise it defers execution to a workqueue via cryptd.
 *
 * This is an alternative to the internal algorithm implementing a fallback for
 * the !may_use_simd() case itself.
 *
 * Note that the wrapper algorithm is asynchronous, i.e. it has the
 * CRYPTO_ALG_ASYNC flag set.  Therefore it won't be found by users who
 * explicitly allocate a synchronous algorithm.
 */

#include <crypto/cryptd.h>
#include <crypto/internal/aead.h>
#include <crypto/internal/simd.h>
#include <crypto/internal/skcipher.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/preempt.h>
#include <asm/simd.h>

/* skcipher support */

struct simd_skcipher_alg {
	const char *ialg_name;
	struct skcipher_alg alg;
};

struct simd_skcipher_ctx {
	struct cryptd_skcipher *cryptd_tfm;
};

static int simd_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
				unsigned int key_len)
{
	struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct crypto_skcipher *child = &ctx->cryptd_tfm->base;

	crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
	crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(tfm) &
					 CRYPTO_TFM_REQ_MASK);
	return crypto_skcipher_setkey(child, key, key_len);
}

static int simd_skcipher_encrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_request *subreq;
	struct crypto_skcipher *child;

	subreq = skcipher_request_ctx(req);
	*subreq = *req;

	if (!crypto_simd_usable() ||
	    (in_atomic() && cryptd_skcipher_queued(ctx->cryptd_tfm)))
		child = &ctx->cryptd_tfm->base;
	else
		child = cryptd_skcipher_child(ctx->cryptd_tfm);

	skcipher_request_set_tfm(subreq, child);

	return crypto_skcipher_encrypt(subreq);
}

static int simd_skcipher_decrypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_request *subreq;
	struct crypto_skcipher *child;

	subreq = skcipher_request_ctx(req);
	*subreq = *req;

	if (!crypto_simd_usable() ||
	    (in_atomic() && cryptd_skcipher_queued(ctx->cryptd_tfm)))
		child = &ctx->cryptd_tfm->base;
	else
		child = cryptd_skcipher_child(ctx->cryptd_tfm);

	skcipher_request_set_tfm(subreq, child);

	return crypto_skcipher_decrypt(subreq);
}

static void simd_skcipher_exit(struct crypto_skcipher *tfm)
{
	struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);

	cryptd_free_skcipher(ctx->cryptd_tfm);
}

static int simd_skcipher_init(struct crypto_skcipher *tfm)
{
	struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct cryptd_skcipher *cryptd_tfm;
	struct simd_skcipher_alg *salg;
	struct skcipher_alg *alg;
	unsigned reqsize;

	alg = crypto_skcipher_alg(tfm);
	salg = container_of(alg, struct simd_skcipher_alg, alg);

	cryptd_tfm = cryptd_alloc_skcipher(salg->ialg_name,
					   CRYPTO_ALG_INTERNAL,
					   CRYPTO_ALG_INTERNAL);
	if (IS_ERR(cryptd_tfm))
		return PTR_ERR(cryptd_tfm);

	ctx->cryptd_tfm = cryptd_tfm;

	reqsize = crypto_skcipher_reqsize(cryptd_skcipher_child(cryptd_tfm));
	reqsize = max(reqsize, crypto_skcipher_reqsize(&cryptd_tfm->base));
	reqsize += sizeof(struct skcipher_request);

	crypto_skcipher_set_reqsize(tfm, reqsize);

	return 0;
}

struct simd_skcipher_alg *simd_skcipher_create_compat(const char *algname,
						      const char *drvname,
						      const char *basename)
{
	struct simd_skcipher_alg *salg;
	struct crypto_skcipher *tfm;
	struct skcipher_alg *ialg;
	struct skcipher_alg *alg;
	int err;

	tfm = crypto_alloc_skcipher(basename, CRYPTO_ALG_INTERNAL,
				    CRYPTO_ALG_INTERNAL | CRYPTO_ALG_ASYNC);
	if (IS_ERR(tfm))
		return ERR_CAST(tfm);

	ialg = crypto_skcipher_alg(tfm);

	salg = kzalloc(sizeof(*salg), GFP_KERNEL);
	if (!salg) {
		salg = ERR_PTR(-ENOMEM);
		goto out_put_tfm;
	}

	salg->ialg_name = basename;
	alg = &salg->alg;

	err = -ENAMETOOLONG;
	if (snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", algname) >=
	    CRYPTO_MAX_ALG_NAME)
		goto out_free_salg;

	if (snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
		     drvname) >= CRYPTO_MAX_ALG_NAME)
		goto out_free_salg;

	alg->base.cra_flags = CRYPTO_ALG_ASYNC |
		(ialg->base.cra_flags & CRYPTO_ALG_INHERITED_FLAGS);
	alg->base.cra_priority = ialg->base.cra_priority;
	alg->base.cra_blocksize = ialg->base.cra_blocksize;
	alg->base.cra_alignmask = ialg->base.cra_alignmask;
	alg->base.cra_module = ialg->base.cra_module;
	alg->base.cra_ctxsize = sizeof(struct simd_skcipher_ctx);

	alg->ivsize = ialg->ivsize;
	alg->chunksize = ialg->chunksize;
	alg->min_keysize = ialg->min_keysize;
	alg->max_keysize = ialg->max_keysize;

	alg->init = simd_skcipher_init;
	alg->exit = simd_skcipher_exit;

	alg->setkey = simd_skcipher_setkey;
	alg->encrypt = simd_skcipher_encrypt;
	alg->decrypt = simd_skcipher_decrypt;

	err = crypto_register_skcipher(alg);
	if (err)
		goto out_free_salg;

out_put_tfm:
	crypto_free_skcipher(tfm);
	return salg;

out_free_salg:
	kfree(salg);
	salg = ERR_PTR(err);
	goto out_put_tfm;
}
EXPORT_SYMBOL_GPL(simd_skcipher_create_compat);

struct simd_skcipher_alg *simd_skcipher_create(const char *algname,
					       const char *basename)
{
	char drvname[CRYPTO_MAX_ALG_NAME];

	if (snprintf(drvname, CRYPTO_MAX_ALG_NAME, "simd-%s", basename) >=
	    CRYPTO_MAX_ALG_NAME)
		return ERR_PTR(-ENAMETOOLONG);

	return simd_skcipher_create_compat(algname, drvname, basename);
}
EXPORT_SYMBOL_GPL(simd_skcipher_create);

void simd_skcipher_free(struct simd_skcipher_alg *salg)
{
	crypto_unregister_skcipher(&salg->alg);
	kfree(salg);
}
EXPORT_SYMBOL_GPL(simd_skcipher_free);

int simd_register_skciphers_compat(struct skcipher_alg *algs, int count,
				   struct simd_skcipher_alg **simd_algs)
{
	int err;
	int i;
	const char *algname;
	const char *drvname;
	const char *basename;
	struct simd_skcipher_alg *simd;

	err = crypto_register_skciphers(algs, count);
	if (err)
		return err;

	for (i = 0; i < count; i++) {
		WARN_ON(strncmp(algs[i].base.cra_name, "__", 2));
		WARN_ON(strncmp(algs[i].base.cra_driver_name, "__", 2));
		algname = algs[i].base.cra_name + 2;
		drvname = algs[i].base.cra_driver_name + 2;
		basename = algs[i].base.cra_driver_name;
		simd = simd_skcipher_create_compat(algname, drvname, basename);
		err = PTR_ERR(simd);
		if (IS_ERR(simd))
			goto err_unregister;
		simd_algs[i] = simd;
	}
	return 0;

err_unregister:
	simd_unregister_skciphers(algs, count, simd_algs);
	return err;
}
EXPORT_SYMBOL_GPL(simd_register_skciphers_compat);

void simd_unregister_skciphers(struct skcipher_alg *algs, int count,
			       struct simd_skcipher_alg **simd_algs)
{
	int i;

	crypto_unregister_skciphers(algs, count);

	for (i = 0; i < count; i++) {
		if (simd_algs[i]) {
			simd_skcipher_free(simd_algs[i]);
			simd_algs[i] = NULL;
		}
	}
}
EXPORT_SYMBOL_GPL(simd_unregister_skciphers);

/* AEAD support */

struct simd_aead_alg {
	const char *ialg_name;
	struct aead_alg alg;
};

struct simd_aead_ctx {
	struct cryptd_aead *cryptd_tfm;
};

static int simd_aead_setkey(struct crypto_aead *tfm, const u8 *key,
				unsigned int key_len)
{
	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
	struct crypto_aead *child = &ctx->cryptd_tfm->base;

	crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK);
	crypto_aead_set_flags(child, crypto_aead_get_flags(tfm) &
				     CRYPTO_TFM_REQ_MASK);
	return crypto_aead_setkey(child, key, key_len);
}

static int simd_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
{
	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
	struct crypto_aead *child = &ctx->cryptd_tfm->base;

	return crypto_aead_setauthsize(child, authsize);
}

static int simd_aead_encrypt(struct aead_request *req)
{
	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
	struct aead_request *subreq;
	struct crypto_aead *child;

	subreq = aead_request_ctx(req);
	*subreq = *req;

	if (!crypto_simd_usable() ||
	    (in_atomic() && cryptd_aead_queued(ctx->cryptd_tfm)))
		child = &ctx->cryptd_tfm->base;
	else
		child = cryptd_aead_child(ctx->cryptd_tfm);

	aead_request_set_tfm(subreq, child);

	return crypto_aead_encrypt(subreq);
}

static int simd_aead_decrypt(struct aead_request *req)
{
	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
	struct aead_request *subreq;
	struct crypto_aead *child;

	subreq = aead_request_ctx(req);
	*subreq = *req;

	if (!crypto_simd_usable() ||
	    (in_atomic() && cryptd_aead_queued(ctx->cryptd_tfm)))
		child = &ctx->cryptd_tfm->base;
	else
		child = cryptd_aead_child(ctx->cryptd_tfm);

	aead_request_set_tfm(subreq, child);

	return crypto_aead_decrypt(subreq);
}

static void simd_aead_exit(struct crypto_aead *tfm)
{
	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);

	cryptd_free_aead(ctx->cryptd_tfm);
}

static int simd_aead_init(struct crypto_aead *tfm)
{
	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
	struct cryptd_aead *cryptd_tfm;
	struct simd_aead_alg *salg;
	struct aead_alg *alg;
	unsigned reqsize;

	alg = crypto_aead_alg(tfm);
	salg = container_of(alg, struct simd_aead_alg, alg);

	cryptd_tfm = cryptd_alloc_aead(salg->ialg_name, CRYPTO_ALG_INTERNAL,
				       CRYPTO_ALG_INTERNAL);
	if (IS_ERR(cryptd_tfm))
		return PTR_ERR(cryptd_tfm);

	ctx->cryptd_tfm = cryptd_tfm;

	reqsize = crypto_aead_reqsize(cryptd_aead_child(cryptd_tfm));
	reqsize = max(reqsize, crypto_aead_reqsize(&cryptd_tfm->base));
	reqsize += sizeof(struct aead_request);

	crypto_aead_set_reqsize(tfm, reqsize);

	return 0;
}

struct simd_aead_alg *simd_aead_create_compat(const char *algname,
					      const char *drvname,
					      const char *basename)
{
	struct simd_aead_alg *salg;
	struct crypto_aead *tfm;
	struct aead_alg *ialg;
	struct aead_alg *alg;
	int err;

	tfm = crypto_alloc_aead(basename, CRYPTO_ALG_INTERNAL,
				CRYPTO_ALG_INTERNAL | CRYPTO_ALG_ASYNC);
	if (IS_ERR(tfm))
		return ERR_CAST(tfm);

	ialg = crypto_aead_alg(tfm);

	salg = kzalloc(sizeof(*salg), GFP_KERNEL);
	if (!salg) {
		salg = ERR_PTR(-ENOMEM);
		goto out_put_tfm;
	}

	salg->ialg_name = basename;
	alg = &salg->alg;

	err = -ENAMETOOLONG;
	if (snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", algname) >=
	    CRYPTO_MAX_ALG_NAME)
		goto out_free_salg;

	if (snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
		     drvname) >= CRYPTO_MAX_ALG_NAME)
		goto out_free_salg;

	alg->base.cra_flags = CRYPTO_ALG_ASYNC |
		(ialg->base.cra_flags & CRYPTO_ALG_INHERITED_FLAGS);
	alg->base.cra_priority = ialg->base.cra_priority;
	alg->base.cra_blocksize = ialg->base.cra_blocksize;
	alg->base.cra_alignmask = ialg->base.cra_alignmask;
	alg->base.cra_module = ialg->base.cra_module;
	alg->base.cra_ctxsize = sizeof(struct simd_aead_ctx);

	alg->ivsize = ialg->ivsize;
	alg->maxauthsize = ialg->maxauthsize;
	alg->chunksize = ialg->chunksize;

	alg->init = simd_aead_init;
	alg->exit = simd_aead_exit;

	alg->setkey = simd_aead_setkey;
	alg->setauthsize = simd_aead_setauthsize;
	alg->encrypt = simd_aead_encrypt;
	alg->decrypt = simd_aead_decrypt;

	err = crypto_register_aead(alg);
	if (err)
		goto out_free_salg;

out_put_tfm:
	crypto_free_aead(tfm);
	return salg;

out_free_salg:
	kfree(salg);
	salg = ERR_PTR(err);
	goto out_put_tfm;
}
EXPORT_SYMBOL_GPL(simd_aead_create_compat);

struct simd_aead_alg *simd_aead_create(const char *algname,
				       const char *basename)
{
	char drvname[CRYPTO_MAX_ALG_NAME];

	if (snprintf(drvname, CRYPTO_MAX_ALG_NAME, "simd-%s", basename) >=
	    CRYPTO_MAX_ALG_NAME)
		return ERR_PTR(-ENAMETOOLONG);

	return simd_aead_create_compat(algname, drvname, basename);
}
EXPORT_SYMBOL_GPL(simd_aead_create);

void simd_aead_free(struct simd_aead_alg *salg)
{
	crypto_unregister_aead(&salg->alg);
	kfree(salg);
}
EXPORT_SYMBOL_GPL(simd_aead_free);

int simd_register_aeads_compat(struct aead_alg *algs, int count,
			       struct simd_aead_alg **simd_algs)
{
	int err;
	int i;
	const char *algname;
	const char *drvname;
	const char *basename;
	struct simd_aead_alg *simd;

	err = crypto_register_aeads(algs, count);
	if (err)
		return err;

	for (i = 0; i < count; i++) {
		WARN_ON(strncmp(algs[i].base.cra_name, "__", 2));
		WARN_ON(strncmp(algs[i].base.cra_driver_name, "__", 2));
		algname = algs[i].base.cra_name + 2;
		drvname = algs[i].base.cra_driver_name + 2;
		basename = algs[i].base.cra_driver_name;
		simd = simd_aead_create_compat(algname, drvname, basename);
		err = PTR_ERR(simd);
		if (IS_ERR(simd))
			goto err_unregister;
		simd_algs[i] = simd;
	}
	return 0;

err_unregister:
	simd_unregister_aeads(algs, count, simd_algs);
	return err;
}
EXPORT_SYMBOL_GPL(simd_register_aeads_compat);

void simd_unregister_aeads(struct aead_alg *algs, int count,
			   struct simd_aead_alg **simd_algs)
{
	int i;

	crypto_unregister_aeads(algs, count);

	for (i = 0; i < count; i++) {
		if (simd_algs[i]) {
			simd_aead_free(simd_algs[i]);
			simd_algs[i] = NULL;
		}
	}
}
EXPORT_SYMBOL_GPL(simd_unregister_aeads);

MODULE_LICENSE("GPL");
Commit	Line	Data
1ccea77e	1	// SPDX-License-Identifier: GPL-2.0-or-later
266d0516 HX	2	/*
	3	* Shared crypto simd helpers
	4	*
	5	* Copyright (c) 2012 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
	6	* Copyright (c) 2016 Herbert Xu <herbert@gondor.apana.org.au>
1661131a	7	* Copyright (c) 2019 Google LLC
266d0516 HX	8	*
	9	* Based on aesni-intel_glue.c by:
	10	* Copyright (C) 2008, Intel Corp.
	11	* Author: Huang Ying <ying.huang@intel.com>
1661131a EB	12	*/
	13
	14	/*
	15	* Shared crypto SIMD helpers. These functions dynamically create and register
	16	* an skcipher or AEAD algorithm that wraps another, internal algorithm. The
	17	* wrapper ensures that the internal algorithm is only executed in a context
	18	* where SIMD instructions are usable, i.e. where may_use_simd() returns true.
	19	* If SIMD is already usable, the wrapper directly calls the internal algorithm.
	20	* Otherwise it defers execution to a workqueue via cryptd.
266d0516	21	*
1661131a EB	22	* This is an alternative to the internal algorithm implementing a fallback for
	23	* the !may_use_simd() case itself.
	24	*
	25	* Note that the wrapper algorithm is asynchronous, i.e. it has the
	26	* CRYPTO_ALG_ASYNC flag set. Therefore it won't be found by users who
	27	* explicitly allocate a synchronous algorithm.
266d0516 HX	28	*/
	29
	30	#include <crypto/cryptd.h>
1661131a	31	#include <crypto/internal/aead.h>
266d0516 HX	32	#include <crypto/internal/simd.h>
	33	#include <crypto/internal/skcipher.h>
	34	#include <linux/kernel.h>
	35	#include <linux/module.h>
	36	#include <linux/preempt.h>
	37	#include <asm/simd.h>
	38
1661131a EB	39	/* skcipher support */
1661131a EB	40
266d0516 HX	41	struct simd_skcipher_alg {
	42	const char *ialg_name;
	43	struct skcipher_alg alg;
	44	};
	45
	46	struct simd_skcipher_ctx {
	47	struct cryptd_skcipher *cryptd_tfm;
	48	};
	49
	50	static int simd_skcipher_setkey(struct crypto_skcipher tfm, const u8 key,
	51	unsigned int key_len)
	52	{
	53	struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	54	struct crypto_skcipher *child = &ctx->cryptd_tfm->base;
266d0516 HX	55
	56	crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
	57	crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(tfm) &
	58	CRYPTO_TFM_REQ_MASK);
af5034e8	59	return crypto_skcipher_setkey(child, key, key_len);
266d0516 HX	60	}
	61
	62	static int simd_skcipher_encrypt(struct skcipher_request *req)
	63	{
	64	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	65	struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	66	struct skcipher_request *subreq;
	67	struct crypto_skcipher *child;
	68
	69	subreq = skcipher_request_ctx(req);
	70	subreq = req;
	71
8b8d91d4	72	if (!crypto_simd_usable() \|\|
266d0516 HX	73	(in_atomic() && cryptd_skcipher_queued(ctx->cryptd_tfm)))
	74	child = &ctx->cryptd_tfm->base;
	75	else
	76	child = cryptd_skcipher_child(ctx->cryptd_tfm);
	77
	78	skcipher_request_set_tfm(subreq, child);
	79
	80	return crypto_skcipher_encrypt(subreq);
	81	}
	82
	83	static int simd_skcipher_decrypt(struct skcipher_request *req)
	84	{
	85	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	86	struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	87	struct skcipher_request *subreq;
	88	struct crypto_skcipher *child;
	89
	90	subreq = skcipher_request_ctx(req);
	91	subreq = req;
	92
8b8d91d4	93	if (!crypto_simd_usable() \|\|
266d0516 HX	94	(in_atomic() && cryptd_skcipher_queued(ctx->cryptd_tfm)))
	95	child = &ctx->cryptd_tfm->base;
	96	else
	97	child = cryptd_skcipher_child(ctx->cryptd_tfm);
	98
	99	skcipher_request_set_tfm(subreq, child);
	100
	101	return crypto_skcipher_decrypt(subreq);
	102	}
	103
	104	static void simd_skcipher_exit(struct crypto_skcipher *tfm)
	105	{
	106	struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	107
	108	cryptd_free_skcipher(ctx->cryptd_tfm);
	109	}
	110
	111	static int simd_skcipher_init(struct crypto_skcipher *tfm)
	112	{
	113	struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
	114	struct cryptd_skcipher *cryptd_tfm;
	115	struct simd_skcipher_alg *salg;
	116	struct skcipher_alg *alg;
	117	unsigned reqsize;
	118
	119	alg = crypto_skcipher_alg(tfm);
	120	salg = container_of(alg, struct simd_skcipher_alg, alg);
	121
	122	cryptd_tfm = cryptd_alloc_skcipher(salg->ialg_name,
	123	CRYPTO_ALG_INTERNAL,
	124	CRYPTO_ALG_INTERNAL);
	125	if (IS_ERR(cryptd_tfm))
	126	return PTR_ERR(cryptd_tfm);
	127
	128	ctx->cryptd_tfm = cryptd_tfm;
	129
508a1c4d AB	130	reqsize = crypto_skcipher_reqsize(cryptd_skcipher_child(cryptd_tfm));
	131	reqsize = max(reqsize, crypto_skcipher_reqsize(&cryptd_tfm->base));
	132	reqsize += sizeof(struct skcipher_request);
266d0516 HX	133
	134	crypto_skcipher_set_reqsize(tfm, reqsize);
	135
	136	return 0;
	137	}
	138
	139	struct simd_skcipher_alg simd_skcipher_create_compat(const char algname,
	140	const char *drvname,
	141	const char *basename)
	142	{
	143	struct simd_skcipher_alg *salg;
	144	struct crypto_skcipher *tfm;
	145	struct skcipher_alg *ialg;
	146	struct skcipher_alg *alg;
	147	int err;
	148
	149	tfm = crypto_alloc_skcipher(basename, CRYPTO_ALG_INTERNAL,
	150	CRYPTO_ALG_INTERNAL \| CRYPTO_ALG_ASYNC);
	151	if (IS_ERR(tfm))
	152	return ERR_CAST(tfm);
	153
	154	ialg = crypto_skcipher_alg(tfm);
	155
	156	salg = kzalloc(sizeof(*salg), GFP_KERNEL);
	157	if (!salg) {
	158	salg = ERR_PTR(-ENOMEM);
	159	goto out_put_tfm;
	160	}
	161
	162	salg->ialg_name = basename;
	163	alg = &salg->alg;
	164
	165	err = -ENAMETOOLONG;
	166	if (snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", algname) >=
	167	CRYPTO_MAX_ALG_NAME)
	168	goto out_free_salg;
	169
	170	if (snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
	171	drvname) >= CRYPTO_MAX_ALG_NAME)
	172	goto out_free_salg;
	173
7bcb2c99 EB	174	alg->base.cra_flags = CRYPTO_ALG_ASYNC \|
7bcb2c99 EB	175	(ialg->base.cra_flags & CRYPTO_ALG_INHERITED_FLAGS);
266d0516 HX	176	alg->base.cra_priority = ialg->base.cra_priority;
	177	alg->base.cra_blocksize = ialg->base.cra_blocksize;
	178	alg->base.cra_alignmask = ialg->base.cra_alignmask;
	179	alg->base.cra_module = ialg->base.cra_module;
	180	alg->base.cra_ctxsize = sizeof(struct simd_skcipher_ctx);
	181
	182	alg->ivsize = ialg->ivsize;
	183	alg->chunksize = ialg->chunksize;
	184	alg->min_keysize = ialg->min_keysize;
	185	alg->max_keysize = ialg->max_keysize;
	186
	187	alg->init = simd_skcipher_init;
	188	alg->exit = simd_skcipher_exit;
	189
	190	alg->setkey = simd_skcipher_setkey;
	191	alg->encrypt = simd_skcipher_encrypt;
	192	alg->decrypt = simd_skcipher_decrypt;
	193
	194	err = crypto_register_skcipher(alg);
	195	if (err)
	196	goto out_free_salg;
	197
	198	out_put_tfm:
	199	crypto_free_skcipher(tfm);
	200	return salg;
	201
	202	out_free_salg:
	203	kfree(salg);
	204	salg = ERR_PTR(err);
	205	goto out_put_tfm;
	206	}
	207	EXPORT_SYMBOL_GPL(simd_skcipher_create_compat);
	208
	209	struct simd_skcipher_alg simd_skcipher_create(const char algname,
	210	const char *basename)
	211	{
	212	char drvname[CRYPTO_MAX_ALG_NAME];
	213
	214	if (snprintf(drvname, CRYPTO_MAX_ALG_NAME, "simd-%s", basename) >=
	215	CRYPTO_MAX_ALG_NAME)
	216	return ERR_PTR(-ENAMETOOLONG);
	217
	218	return simd_skcipher_create_compat(algname, drvname, basename);
	219	}
	220	EXPORT_SYMBOL_GPL(simd_skcipher_create);
	221
	222	void simd_skcipher_free(struct simd_skcipher_alg *salg)
	223	{
	224	crypto_unregister_skcipher(&salg->alg);
	225	kfree(salg);
	226	}
	227	EXPORT_SYMBOL_GPL(simd_skcipher_free);
	228
d14f0a1f EB	229	int simd_register_skciphers_compat(struct skcipher_alg *algs, int count,
	230	struct simd_skcipher_alg **simd_algs)
	231	{
	232	int err;
	233	int i;
	234	const char *algname;
	235	const char *drvname;
	236	const char *basename;
	237	struct simd_skcipher_alg *simd;
	238
	239	err = crypto_register_skciphers(algs, count);
	240	if (err)
	241	return err;
	242
	243	for (i = 0; i < count; i++) {
	244	WARN_ON(strncmp(algs[i].base.cra_name, "__", 2));
	245	WARN_ON(strncmp(algs[i].base.cra_driver_name, "__", 2));
	246	algname = algs[i].base.cra_name + 2;
	247	drvname = algs[i].base.cra_driver_name + 2;
	248	basename = algs[i].base.cra_driver_name;
	249	simd = simd_skcipher_create_compat(algname, drvname, basename);
	250	err = PTR_ERR(simd);
	251	if (IS_ERR(simd))
	252	goto err_unregister;
	253	simd_algs[i] = simd;
	254	}
	255	return 0;
	256
	257	err_unregister:
	258	simd_unregister_skciphers(algs, count, simd_algs);
	259	return err;
	260	}
	261	EXPORT_SYMBOL_GPL(simd_register_skciphers_compat);
	262
	263	void simd_unregister_skciphers(struct skcipher_alg *algs, int count,
	264	struct simd_skcipher_alg **simd_algs)
	265	{
	266	int i;
	267
	268	crypto_unregister_skciphers(algs, count);
	269
	270	for (i = 0; i < count; i++) {
	271	if (simd_algs[i]) {
	272	simd_skcipher_free(simd_algs[i]);
	273	simd_algs[i] = NULL;
	274	}
	275	}
	276	}
	277	EXPORT_SYMBOL_GPL(simd_unregister_skciphers);
	278
1661131a EB	279	/* AEAD support */
	280
	281	struct simd_aead_alg {
	282	const char *ialg_name;
	283	struct aead_alg alg;
	284	};
	285
	286	struct simd_aead_ctx {
	287	struct cryptd_aead *cryptd_tfm;
	288	};
	289
	290	static int simd_aead_setkey(struct crypto_aead tfm, const u8 key,
	291	unsigned int key_len)
	292	{
	293	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
	294	struct crypto_aead *child = &ctx->cryptd_tfm->base;
1661131a EB	295
	296	crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK);
	297	crypto_aead_set_flags(child, crypto_aead_get_flags(tfm) &
	298	CRYPTO_TFM_REQ_MASK);
af5034e8	299	return crypto_aead_setkey(child, key, key_len);
1661131a EB	300	}
	301
	302	static int simd_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
	303	{
	304	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
	305	struct crypto_aead *child = &ctx->cryptd_tfm->base;
	306
	307	return crypto_aead_setauthsize(child, authsize);
	308	}
	309
	310	static int simd_aead_encrypt(struct aead_request *req)
	311	{
	312	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
	313	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
	314	struct aead_request *subreq;
	315	struct crypto_aead *child;
	316
	317	subreq = aead_request_ctx(req);
	318	subreq = req;
	319
8b8d91d4	320	if (!crypto_simd_usable() \|\|
1661131a EB	321	(in_atomic() && cryptd_aead_queued(ctx->cryptd_tfm)))
	322	child = &ctx->cryptd_tfm->base;
	323	else
	324	child = cryptd_aead_child(ctx->cryptd_tfm);
	325
	326	aead_request_set_tfm(subreq, child);
	327
	328	return crypto_aead_encrypt(subreq);
	329	}
	330
	331	static int simd_aead_decrypt(struct aead_request *req)
	332	{
	333	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
	334	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
	335	struct aead_request *subreq;
	336	struct crypto_aead *child;
	337
	338	subreq = aead_request_ctx(req);
	339	subreq = req;
	340
8b8d91d4	341	if (!crypto_simd_usable() \|\|
1661131a EB	342	(in_atomic() && cryptd_aead_queued(ctx->cryptd_tfm)))
	343	child = &ctx->cryptd_tfm->base;
	344	else
	345	child = cryptd_aead_child(ctx->cryptd_tfm);
	346
	347	aead_request_set_tfm(subreq, child);
	348
	349	return crypto_aead_decrypt(subreq);
	350	}
	351
	352	static void simd_aead_exit(struct crypto_aead *tfm)
	353	{
	354	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
	355
	356	cryptd_free_aead(ctx->cryptd_tfm);
	357	}
	358
	359	static int simd_aead_init(struct crypto_aead *tfm)
	360	{
	361	struct simd_aead_ctx *ctx = crypto_aead_ctx(tfm);
	362	struct cryptd_aead *cryptd_tfm;
	363	struct simd_aead_alg *salg;
	364	struct aead_alg *alg;
	365	unsigned reqsize;
	366
	367	alg = crypto_aead_alg(tfm);
	368	salg = container_of(alg, struct simd_aead_alg, alg);
	369
	370	cryptd_tfm = cryptd_alloc_aead(salg->ialg_name, CRYPTO_ALG_INTERNAL,
	371	CRYPTO_ALG_INTERNAL);
	372	if (IS_ERR(cryptd_tfm))
	373	return PTR_ERR(cryptd_tfm);
	374
	375	ctx->cryptd_tfm = cryptd_tfm;
	376
	377	reqsize = crypto_aead_reqsize(cryptd_aead_child(cryptd_tfm));
	378	reqsize = max(reqsize, crypto_aead_reqsize(&cryptd_tfm->base));
	379	reqsize += sizeof(struct aead_request);
	380
	381	crypto_aead_set_reqsize(tfm, reqsize);
	382
	383	return 0;
	384	}
	385
	386	struct simd_aead_alg simd_aead_create_compat(const char algname,
	387	const char *drvname,
	388	const char *basename)
	389	{
	390	struct simd_aead_alg *salg;
	391	struct crypto_aead *tfm;
	392	struct aead_alg *ialg;
	393	struct aead_alg *alg;
	394	int err;
	395
	396	tfm = crypto_alloc_aead(basename, CRYPTO_ALG_INTERNAL,
	397	CRYPTO_ALG_INTERNAL \| CRYPTO_ALG_ASYNC);
	398	if (IS_ERR(tfm))
	399	return ERR_CAST(tfm);
	400
	401	ialg = crypto_aead_alg(tfm);
	402
	403	salg = kzalloc(sizeof(*salg), GFP_KERNEL);
	404	if (!salg) {
	405	salg = ERR_PTR(-ENOMEM);
406	goto out_put_tfm;
407	}
408
409	salg->ialg_name = basename;
410	alg = &salg->alg;
411
412	err = -ENAMETOOLONG;
413	if (snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", algname) >=
414	CRYPTO_MAX_ALG_NAME)
415	goto out_free_salg;
416
417	if (snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
418	drvname) >= CRYPTO_MAX_ALG_NAME)
419	goto out_free_salg;
420
7bcb2c99 EB	421	alg->base.cra_flags = CRYPTO_ALG_ASYNC \|
7bcb2c99 EB	422	(ialg->base.cra_flags & CRYPTO_ALG_INHERITED_FLAGS);
1661131a EB	423	alg->base.cra_priority = ialg->base.cra_priority;
	424	alg->base.cra_blocksize = ialg->base.cra_blocksize;
	425	alg->base.cra_alignmask = ialg->base.cra_alignmask;
	426	alg->base.cra_module = ialg->base.cra_module;
	427	alg->base.cra_ctxsize = sizeof(struct simd_aead_ctx);
	428
	429	alg->ivsize = ialg->ivsize;
	430	alg->maxauthsize = ialg->maxauthsize;
	431	alg->chunksize = ialg->chunksize;
	432
	433	alg->init = simd_aead_init;
	434	alg->exit = simd_aead_exit;
	435
	436	alg->setkey = simd_aead_setkey;
	437	alg->setauthsize = simd_aead_setauthsize;
	438	alg->encrypt = simd_aead_encrypt;
	439	alg->decrypt = simd_aead_decrypt;
	440
	441	err = crypto_register_aead(alg);
	442	if (err)
	443	goto out_free_salg;
	444
	445	out_put_tfm:
	446	crypto_free_aead(tfm);
	447	return salg;
	448
	449	out_free_salg:
	450	kfree(salg);
	451	salg = ERR_PTR(err);
	452	goto out_put_tfm;
	453	}
	454	EXPORT_SYMBOL_GPL(simd_aead_create_compat);
	455
	456	struct simd_aead_alg simd_aead_create(const char algname,
	457	const char *basename)
	458	{
	459	char drvname[CRYPTO_MAX_ALG_NAME];
	460
	461	if (snprintf(drvname, CRYPTO_MAX_ALG_NAME, "simd-%s", basename) >=
	462	CRYPTO_MAX_ALG_NAME)
	463	return ERR_PTR(-ENAMETOOLONG);
	464
	465	return simd_aead_create_compat(algname, drvname, basename);
	466	}
	467	EXPORT_SYMBOL_GPL(simd_aead_create);
	468
	469	void simd_aead_free(struct simd_aead_alg *salg)
	470	{
	471	crypto_unregister_aead(&salg->alg);
	472	kfree(salg);
	473	}
	474	EXPORT_SYMBOL_GPL(simd_aead_free);
	475
	476	int simd_register_aeads_compat(struct aead_alg *algs, int count,
	477	struct simd_aead_alg **simd_algs)
	478	{
	479	int err;
	480	int i;
	481	const char *algname;
	482	const char *drvname;
	483	const char *basename;
	484	struct simd_aead_alg *simd;
	485
	486	err = crypto_register_aeads(algs, count);
487	if (err)
488	return err;
489
490	for (i = 0; i < count; i++) {
491	WARN_ON(strncmp(algs[i].base.cra_name, "__", 2));
492	WARN_ON(strncmp(algs[i].base.cra_driver_name, "__", 2));
493	algname = algs[i].base.cra_name + 2;
494	drvname = algs[i].base.cra_driver_name + 2;
495	basename = algs[i].base.cra_driver_name;
496	simd = simd_aead_create_compat(algname, drvname, basename);
497	err = PTR_ERR(simd);
498	if (IS_ERR(simd))
499	goto err_unregister;
500	simd_algs[i] = simd;
501	}
502	return 0;
503
504	err_unregister:
505	simd_unregister_aeads(algs, count, simd_algs);
506	return err;
507	}
508	EXPORT_SYMBOL_GPL(simd_register_aeads_compat);
509
510	void simd_unregister_aeads(struct aead_alg *algs, int count,
511	struct simd_aead_alg **simd_algs)
512	{
513	int i;
514
515	crypto_unregister_aeads(algs, count);
516
517	for (i = 0; i < count; i++) {
518	if (simd_algs[i]) {
519	simd_aead_free(simd_algs[i]);
520	simd_algs[i] = NULL;
521	}
522	}
523	}
524	EXPORT_SYMBOL_GPL(simd_unregister_aeads);
525
266d0516	526	MODULE_LICENSE("GPL");