crypto: create generic version of ablk_helper (a62b01cd) · Commits · 戴 / test

crypto/Kconfig

+4 −0

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		@@ -179,6 +179,10 @@ config CRYPTO_ABLK_HELPER_X86
		depends on X86
		select CRYPTO_CRYPTD

		config CRYPTO_ABLK_HELPER
		tristate
		select CRYPTO_CRYPTD

		config CRYPTO_GLUE_HELPER_X86
		tristate
		depends on X86

crypto/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -104,3 +104,4 @@ obj-$(CONFIG_CRYPTO_USER_API_SKCIPHER) += algif_skcipher.o
		obj-$(CONFIG_XOR_BLOCKS) += xor.o
		obj-$(CONFIG_ASYNC_CORE) += async_tx/
		obj-$(CONFIG_ASYMMETRIC_KEY_TYPE) += asymmetric_keys/
		obj-$(CONFIG_CRYPTO_ABLK_HELPER) += ablk_helper.o

crypto/ablk_helper.c

0 → 100644

+150 −0

Original line number	Diff line number	Diff line
		/*
		* 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);

		memcpy(cryptd_req, req, sizeof(*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);

		memcpy(cryptd_req, req, sizeof(*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");

include/asm-generic/simd.h

0 → 100644

+14 −0

Original line number	Diff line number	Diff line

		#include <linux/hardirq.h>

		/*
		* may_use_simd - whether it is allowable at this time to issue SIMD
		* instructions or access the SIMD register file
		*
		* As architectures typically don't preserve the SIMD register file when
		* taking an interrupt, !in_interrupt() should be a reasonable default.
		*/
		static __must_check inline bool may_use_simd(void)
		{
		return !in_interrupt();
		}

include/crypto/ablk_helper.h

0 → 100644

+31 −0

Original line number	Diff line number	Diff line
		/*
		* Shared async block cipher helpers
		*/

		#ifndef _CRYPTO_ABLK_HELPER_H
		#define _CRYPTO_ABLK_HELPER_H

		#include <linux/crypto.h>
		#include <linux/kernel.h>
		#include <crypto/cryptd.h>

		struct async_helper_ctx {
		struct cryptd_ablkcipher *cryptd_tfm;
		};

		extern int ablk_set_key(struct crypto_ablkcipher tfm, const u8 key,
		unsigned int key_len);

		extern int __ablk_encrypt(struct ablkcipher_request *req);

		extern int ablk_encrypt(struct ablkcipher_request *req);

		extern int ablk_decrypt(struct ablkcipher_request *req);

		extern void ablk_exit(struct crypto_tfm *tfm);

		extern int ablk_init_common(struct crypto_tfm tfm, const char drv_name);

		extern int ablk_init(struct crypto_tfm *tfm);

		#endif /* _CRYPTO_ABLK_HELPER_H */

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