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Release 4.15 crypto/simd.c

Directory: crypto
/*
 * 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; }

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Herbert Xu90100.00%1100.00%
Total90100.00%1100.00%


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); }

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Herbert Xu104100.00%1100.00%
Total104100.00%1100.00%


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); }

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Herbert Xu104100.00%1100.00%
Total104100.00%1100.00%


static void simd_skcipher_exit(struct crypto_skcipher *tfm) { struct simd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); cryptd_free_skcipher(ctx->cryptd_tfm); }

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Herbert Xu28100.00%1100.00%
Total28100.00%1100.00%


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; }

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Herbert Xu118100.00%1100.00%
Total118100.00%1100.00%


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; }

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Herbert Xu342100.00%1100.00%
Total342100.00%1100.00%

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); }

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Herbert Xu55100.00%1100.00%
Total55100.00%1100.00%

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

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Herbert Xu23100.00%1100.00%
Total23100.00%1100.00%

EXPORT_SYMBOL_GPL(simd_skcipher_free); MODULE_LICENSE("GPL");

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Herbert Xu930100.00%1100.00%
Total930100.00%1100.00%
Directory: crypto
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