1af39daaad
A few years ago the FSF moved and "59 Temple Place" is wrong. Having this still in our source files feels old and unmaintained. Let's take the license statement serious and not confuse users. As https://www.gnu.org/licenses/gpl-howto.html suggests, we replace the postal address with "<http://www.gnu.org/licenses/>". Signed-off-by: Martin Kepplinger <martink@posteo.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
151 lines
4.3 KiB
C
151 lines
4.3 KiB
C
/*
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* Shared async block cipher helpers
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*
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* Copyright (c) 2012 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
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*
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* Based on aesni-intel_glue.c by:
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* Copyright (C) 2008, Intel Corp.
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* Author: Huang Ying <ying.huang@intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/crypto.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/hardirq.h>
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#include <crypto/algapi.h>
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#include <crypto/cryptd.h>
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#include <crypto/ablk_helper.h>
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#include <asm/simd.h>
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int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
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unsigned int key_len)
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{
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struct async_helper_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base;
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int err;
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crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
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crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm)
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& CRYPTO_TFM_REQ_MASK);
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err = crypto_ablkcipher_setkey(child, key, key_len);
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crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child)
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& CRYPTO_TFM_RES_MASK);
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return err;
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}
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EXPORT_SYMBOL_GPL(ablk_set_key);
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int __ablk_encrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct async_helper_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct blkcipher_desc desc;
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desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
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desc.info = req->info;
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desc.flags = 0;
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return crypto_blkcipher_crt(desc.tfm)->encrypt(
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&desc, req->dst, req->src, req->nbytes);
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}
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EXPORT_SYMBOL_GPL(__ablk_encrypt);
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int ablk_encrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct async_helper_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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if (!may_use_simd() ||
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(in_atomic() && cryptd_ablkcipher_queued(ctx->cryptd_tfm))) {
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struct ablkcipher_request *cryptd_req =
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ablkcipher_request_ctx(req);
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*cryptd_req = *req;
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ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
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return crypto_ablkcipher_encrypt(cryptd_req);
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} else {
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return __ablk_encrypt(req);
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}
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}
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EXPORT_SYMBOL_GPL(ablk_encrypt);
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int ablk_decrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct async_helper_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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if (!may_use_simd() ||
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(in_atomic() && cryptd_ablkcipher_queued(ctx->cryptd_tfm))) {
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struct ablkcipher_request *cryptd_req =
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ablkcipher_request_ctx(req);
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*cryptd_req = *req;
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ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
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return crypto_ablkcipher_decrypt(cryptd_req);
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} else {
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struct blkcipher_desc desc;
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desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
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desc.info = req->info;
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desc.flags = 0;
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return crypto_blkcipher_crt(desc.tfm)->decrypt(
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&desc, req->dst, req->src, req->nbytes);
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}
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}
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EXPORT_SYMBOL_GPL(ablk_decrypt);
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void ablk_exit(struct crypto_tfm *tfm)
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{
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struct async_helper_ctx *ctx = crypto_tfm_ctx(tfm);
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cryptd_free_ablkcipher(ctx->cryptd_tfm);
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}
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EXPORT_SYMBOL_GPL(ablk_exit);
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int ablk_init_common(struct crypto_tfm *tfm, const char *drv_name)
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{
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struct async_helper_ctx *ctx = crypto_tfm_ctx(tfm);
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struct cryptd_ablkcipher *cryptd_tfm;
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cryptd_tfm = cryptd_alloc_ablkcipher(drv_name, CRYPTO_ALG_INTERNAL,
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CRYPTO_ALG_INTERNAL);
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if (IS_ERR(cryptd_tfm))
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return PTR_ERR(cryptd_tfm);
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ctx->cryptd_tfm = cryptd_tfm;
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tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) +
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crypto_ablkcipher_reqsize(&cryptd_tfm->base);
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return 0;
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}
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EXPORT_SYMBOL_GPL(ablk_init_common);
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int ablk_init(struct crypto_tfm *tfm)
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{
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char drv_name[CRYPTO_MAX_ALG_NAME];
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snprintf(drv_name, sizeof(drv_name), "__driver-%s",
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crypto_tfm_alg_driver_name(tfm));
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return ablk_init_common(tfm, drv_name);
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}
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EXPORT_SYMBOL_GPL(ablk_init);
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MODULE_LICENSE("GPL");
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