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crypto: ablk_helper - move ablk_* functions from serpent-sse2/avx glu…
…e code to shared module Move ablk-* functions to separate module to share common code between cipher implementations. Signed-off-by: Jussi Kivilinna <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| /* | ||
| * Shared async block cipher helpers | ||
| * | ||
| * Copyright (c) 2012 Jussi Kivilinna <[email protected]> | ||
| * | ||
| * Based on aesni-intel_glue.c by: | ||
| * Copyright (C) 2008, Intel Corp. | ||
| * Author: Huang Ying <[email protected]> | ||
| * | ||
| * 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 <crypto/algapi.h> | ||
| #include <crypto/cryptd.h> | ||
| #include <asm/i387.h> | ||
| #include <asm/crypto/ablk_helper.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 (!irq_fpu_usable()) { | ||
| 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 (!irq_fpu_usable()) { | ||
| 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); | ||
|
|
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| 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); | ||
|
|
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| cryptd_free_ablkcipher(ctx->cryptd_tfm); | ||
| } | ||
| EXPORT_SYMBOL_GPL(ablk_exit); | ||
|
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||
| void ablk_init_common(struct crypto_tfm *tfm, | ||
| struct cryptd_ablkcipher *cryptd_tfm) | ||
| { | ||
| struct async_helper_ctx *ctx = crypto_tfm_ctx(tfm); | ||
|
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||
| ctx->cryptd_tfm = cryptd_tfm; | ||
| tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) + | ||
| crypto_ablkcipher_reqsize(&cryptd_tfm->base); | ||
| } | ||
| EXPORT_SYMBOL_GPL(ablk_init_common); | ||
|
|
||
| int ablk_init(struct crypto_tfm *tfm) | ||
| { | ||
| struct cryptd_ablkcipher *cryptd_tfm; | ||
| char drv_name[CRYPTO_MAX_ALG_NAME]; | ||
|
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||
| snprintf(drv_name, sizeof(drv_name), "__driver-%s", | ||
| crypto_tfm_alg_driver_name(tfm)); | ||
|
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| cryptd_tfm = cryptd_alloc_ablkcipher(drv_name, 0, 0); | ||
| if (IS_ERR(cryptd_tfm)) | ||
| return PTR_ERR(cryptd_tfm); | ||
|
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| ablk_init_common(tfm, cryptd_tfm); | ||
|
|
||
| return 0; | ||
| } | ||
| EXPORT_SYMBOL_GPL(ablk_init); | ||
|
|
||
| MODULE_LICENSE("GPL"); |
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