mirror of
https://github.com/torvalds/linux
synced 2024-09-06 18:01:05 +00:00
crypto: simd - Add simd skcipher helper
This patch adds the simd skcipher helper which is meant to be a replacement for ablk helper. It replaces the underlying blkcipher interface with skcipher, and also presents the top-level algorithm as an skcipher. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
parent
4e0958d19b
commit
266d051601
|
@ -246,6 +246,10 @@ config CRYPTO_ABLK_HELPER
|
|||
tristate
|
||||
select CRYPTO_CRYPTD
|
||||
|
||||
config CRYPTO_SIMD
|
||||
tristate
|
||||
select CRYPTO_CRYPTD
|
||||
|
||||
config CRYPTO_GLUE_HELPER_X86
|
||||
tristate
|
||||
depends on X86
|
||||
|
|
|
@ -142,3 +142,5 @@ obj-$(CONFIG_ASYNC_CORE) += async_tx/
|
|||
obj-$(CONFIG_ASYMMETRIC_KEY_TYPE) += asymmetric_keys/
|
||||
obj-$(CONFIG_CRYPTO_HASH_INFO) += hash_info.o
|
||||
obj-$(CONFIG_CRYPTO_ABLK_HELPER) += ablk_helper.o
|
||||
crypto_simd-y := simd.o
|
||||
obj-$(CONFIG_CRYPTO_SIMD) += crypto_simd.o
|
||||
|
|
226
crypto/simd.c
Normal file
226
crypto/simd.c
Normal file
|
@ -0,0 +1,226 @@
|
|||
/*
|
||||
* Shared crypto simd helpers
|
||||
*
|
||||
* Copyright (c) 2012 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
|
||||
* Copyright (c) 2016 Herbert Xu <herbert@gondor.apana.org.au>
|
||||
*
|
||||
* Based on aesni-intel_glue.c by:
|
||||
* Copyright (C) 2008, Intel Corp.
|
||||
* Author: Huang Ying <ying.huang@intel.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.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
||||
* USA
|
||||
*
|
||||
*/
|
||||
|
||||
#include <crypto/cryptd.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>
|
||||
|
||||
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;
|
||||
int err;
|
||||
|
||||
crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
|
||||
crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(tfm) &
|
||||
CRYPTO_TFM_REQ_MASK);
|
||||
err = crypto_skcipher_setkey(child, key, key_len);
|
||||
crypto_skcipher_set_flags(tfm, crypto_skcipher_get_flags(child) &
|
||||
CRYPTO_TFM_RES_MASK);
|
||||
return err;
|
||||
}
|
||||
|
||||
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 (!may_use_simd() ||
|
||||
(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 (!may_use_simd() ||
|
||||
(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 = sizeof(struct skcipher_request);
|
||||
reqsize += crypto_skcipher_reqsize(&cryptd_tfm->base);
|
||||
|
||||
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;
|
||||
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);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
17
include/crypto/internal/simd.h
Normal file
17
include/crypto/internal/simd.h
Normal file
|
@ -0,0 +1,17 @@
|
|||
/*
|
||||
* Shared crypto simd helpers
|
||||
*/
|
||||
|
||||
#ifndef _CRYPTO_INTERNAL_SIMD_H
|
||||
#define _CRYPTO_INTERNAL_SIMD_H
|
||||
|
||||
struct simd_skcipher_alg;
|
||||
|
||||
struct simd_skcipher_alg *simd_skcipher_create_compat(const char *algname,
|
||||
const char *drvname,
|
||||
const char *basename);
|
||||
struct simd_skcipher_alg *simd_skcipher_create(const char *algname,
|
||||
const char *basename);
|
||||
void simd_skcipher_free(struct simd_skcipher_alg *alg);
|
||||
|
||||
#endif /* _CRYPTO_INTERNAL_SIMD_H */
|
Loading…
Reference in a new issue