150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/*
|
|
* Shared async block cipher helpers
|
|
*
|
|
* Copyright (c) 2012 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
|
|
*
|
|
* 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 <linux/kernel.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/hardirq.h>
|
|
#include <crypto/algapi.h>
|
|
#include <crypto/cryptd.h>
|
|
#include <crypto/ablk_helper.h>
|
|
#include <asm/simd.h>
|
|
|
|
int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
|
|
unsigned int key_len)
|
|
{
|
|
struct async_helper_ctx *ctx = crypto_ablkcipher_ctx(tfm);
|
|
struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base;
|
|
int err;
|
|
|
|
crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
|
|
crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm)
|
|
& CRYPTO_TFM_REQ_MASK);
|
|
err = crypto_ablkcipher_setkey(child, key, key_len);
|
|
crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child)
|
|
& CRYPTO_TFM_RES_MASK);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ablk_set_key);
|
|
|
|
int __ablk_encrypt(struct ablkcipher_request *req)
|
|
{
|
|
struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
|
|
struct async_helper_ctx *ctx = crypto_ablkcipher_ctx(tfm);
|
|
struct blkcipher_desc desc;
|
|
|
|
desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
|
|
desc.info = req->info;
|
|
desc.flags = 0;
|
|
|
|
return crypto_blkcipher_crt(desc.tfm)->encrypt(
|
|
&desc, req->dst, req->src, req->nbytes);
|
|
}
|
|
EXPORT_SYMBOL_GPL(__ablk_encrypt);
|
|
|
|
int ablk_encrypt(struct ablkcipher_request *req)
|
|
{
|
|
struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
|
|
struct async_helper_ctx *ctx = crypto_ablkcipher_ctx(tfm);
|
|
|
|
if (!may_use_simd()) {
|
|
struct ablkcipher_request *cryptd_req =
|
|
ablkcipher_request_ctx(req);
|
|
|
|
*cryptd_req = *req;
|
|
ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
|
|
|
|
return crypto_ablkcipher_encrypt(cryptd_req);
|
|
} else {
|
|
return __ablk_encrypt(req);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(ablk_encrypt);
|
|
|
|
int ablk_decrypt(struct ablkcipher_request *req)
|
|
{
|
|
struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
|
|
struct async_helper_ctx *ctx = crypto_ablkcipher_ctx(tfm);
|
|
|
|
if (!may_use_simd()) {
|
|
struct ablkcipher_request *cryptd_req =
|
|
ablkcipher_request_ctx(req);
|
|
|
|
*cryptd_req = *req;
|
|
ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
|
|
|
|
return crypto_ablkcipher_decrypt(cryptd_req);
|
|
} else {
|
|
struct blkcipher_desc desc;
|
|
|
|
desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
|
|
desc.info = req->info;
|
|
desc.flags = 0;
|
|
|
|
return crypto_blkcipher_crt(desc.tfm)->decrypt(
|
|
&desc, req->dst, req->src, req->nbytes);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(ablk_decrypt);
|
|
|
|
void ablk_exit(struct crypto_tfm *tfm)
|
|
{
|
|
struct async_helper_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
cryptd_free_ablkcipher(ctx->cryptd_tfm);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ablk_exit);
|
|
|
|
int ablk_init_common(struct crypto_tfm *tfm, const char *drv_name)
|
|
{
|
|
struct async_helper_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
struct cryptd_ablkcipher *cryptd_tfm;
|
|
|
|
cryptd_tfm = cryptd_alloc_ablkcipher(drv_name, 0, 0);
|
|
if (IS_ERR(cryptd_tfm))
|
|
return PTR_ERR(cryptd_tfm);
|
|
|
|
ctx->cryptd_tfm = cryptd_tfm;
|
|
tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) +
|
|
crypto_ablkcipher_reqsize(&cryptd_tfm->base);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ablk_init_common);
|
|
|
|
int ablk_init(struct crypto_tfm *tfm)
|
|
{
|
|
char drv_name[CRYPTO_MAX_ALG_NAME];
|
|
|
|
snprintf(drv_name, sizeof(drv_name), "__driver-%s",
|
|
crypto_tfm_alg_driver_name(tfm));
|
|
|
|
return ablk_init_common(tfm, drv_name);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ablk_init);
|
|
|
|
MODULE_LICENSE("GPL");
|