![Eric Biggers](/assets/img/avatar_default.png)
Some ahash algorithms set .cra_type = &crypto_ahash_type. But this is redundant with the C structure type ('struct ahash_alg'), and crypto_register_ahash() already sets the .cra_type automatically. Apparently the useless assignment has just been copy+pasted around. So, remove the useless assignment from all the ahash algorithms. This patch shouldn't change any actual behavior. Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
1014 lines
28 KiB
C
1014 lines
28 KiB
C
/*
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* Multi buffer SHA256 algorithm Glue Code
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2016 Intel Corporation.
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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 version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* Contact Information:
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* Megha Dey <megha.dey@linux.intel.com>
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*
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* BSD LICENSE
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*
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* Copyright(c) 2016 Intel Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/cryptohash.h>
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#include <linux/types.h>
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#include <linux/list.h>
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#include <crypto/scatterwalk.h>
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#include <crypto/sha.h>
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#include <crypto/mcryptd.h>
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#include <crypto/crypto_wq.h>
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#include <asm/byteorder.h>
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#include <linux/hardirq.h>
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#include <asm/fpu/api.h>
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#include "sha256_mb_ctx.h"
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#define FLUSH_INTERVAL 1000 /* in usec */
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static struct mcryptd_alg_state sha256_mb_alg_state;
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struct sha256_mb_ctx {
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struct mcryptd_ahash *mcryptd_tfm;
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};
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static inline struct mcryptd_hash_request_ctx
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*cast_hash_to_mcryptd_ctx(struct sha256_hash_ctx *hash_ctx)
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{
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struct ahash_request *areq;
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areq = container_of((void *) hash_ctx, struct ahash_request, __ctx);
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return container_of(areq, struct mcryptd_hash_request_ctx, areq);
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}
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static inline struct ahash_request
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*cast_mcryptd_ctx_to_req(struct mcryptd_hash_request_ctx *ctx)
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{
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return container_of((void *) ctx, struct ahash_request, __ctx);
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}
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static void req_ctx_init(struct mcryptd_hash_request_ctx *rctx,
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struct ahash_request *areq)
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{
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rctx->flag = HASH_UPDATE;
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}
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static asmlinkage void (*sha256_job_mgr_init)(struct sha256_mb_mgr *state);
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static asmlinkage struct job_sha256* (*sha256_job_mgr_submit)
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(struct sha256_mb_mgr *state, struct job_sha256 *job);
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static asmlinkage struct job_sha256* (*sha256_job_mgr_flush)
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(struct sha256_mb_mgr *state);
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static asmlinkage struct job_sha256* (*sha256_job_mgr_get_comp_job)
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(struct sha256_mb_mgr *state);
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inline uint32_t sha256_pad(uint8_t padblock[SHA256_BLOCK_SIZE * 2],
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uint64_t total_len)
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{
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uint32_t i = total_len & (SHA256_BLOCK_SIZE - 1);
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memset(&padblock[i], 0, SHA256_BLOCK_SIZE);
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padblock[i] = 0x80;
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i += ((SHA256_BLOCK_SIZE - 1) &
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(0 - (total_len + SHA256_PADLENGTHFIELD_SIZE + 1)))
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+ 1 + SHA256_PADLENGTHFIELD_SIZE;
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#if SHA256_PADLENGTHFIELD_SIZE == 16
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*((uint64_t *) &padblock[i - 16]) = 0;
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#endif
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*((uint64_t *) &padblock[i - 8]) = cpu_to_be64(total_len << 3);
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/* Number of extra blocks to hash */
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return i >> SHA256_LOG2_BLOCK_SIZE;
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}
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static struct sha256_hash_ctx
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*sha256_ctx_mgr_resubmit(struct sha256_ctx_mgr *mgr,
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struct sha256_hash_ctx *ctx)
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{
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while (ctx) {
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if (ctx->status & HASH_CTX_STS_COMPLETE) {
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/* Clear PROCESSING bit */
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ctx->status = HASH_CTX_STS_COMPLETE;
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return ctx;
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}
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/*
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* If the extra blocks are empty, begin hashing what remains
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* in the user's buffer.
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*/
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if (ctx->partial_block_buffer_length == 0 &&
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ctx->incoming_buffer_length) {
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const void *buffer = ctx->incoming_buffer;
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uint32_t len = ctx->incoming_buffer_length;
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uint32_t copy_len;
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/*
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* Only entire blocks can be hashed.
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* Copy remainder to extra blocks buffer.
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*/
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copy_len = len & (SHA256_BLOCK_SIZE-1);
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if (copy_len) {
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len -= copy_len;
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memcpy(ctx->partial_block_buffer,
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((const char *) buffer + len),
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copy_len);
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ctx->partial_block_buffer_length = copy_len;
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}
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ctx->incoming_buffer_length = 0;
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/* len should be a multiple of the block size now */
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assert((len % SHA256_BLOCK_SIZE) == 0);
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/* Set len to the number of blocks to be hashed */
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len >>= SHA256_LOG2_BLOCK_SIZE;
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if (len) {
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ctx->job.buffer = (uint8_t *) buffer;
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ctx->job.len = len;
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ctx = (struct sha256_hash_ctx *)
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sha256_job_mgr_submit(&mgr->mgr, &ctx->job);
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continue;
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}
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}
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/*
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* If the extra blocks are not empty, then we are
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* either on the last block(s) or we need more
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* user input before continuing.
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*/
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if (ctx->status & HASH_CTX_STS_LAST) {
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uint8_t *buf = ctx->partial_block_buffer;
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uint32_t n_extra_blocks =
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sha256_pad(buf, ctx->total_length);
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ctx->status = (HASH_CTX_STS_PROCESSING |
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HASH_CTX_STS_COMPLETE);
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ctx->job.buffer = buf;
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ctx->job.len = (uint32_t) n_extra_blocks;
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ctx = (struct sha256_hash_ctx *)
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sha256_job_mgr_submit(&mgr->mgr, &ctx->job);
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continue;
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}
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ctx->status = HASH_CTX_STS_IDLE;
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return ctx;
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}
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return NULL;
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}
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static struct sha256_hash_ctx
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*sha256_ctx_mgr_get_comp_ctx(struct sha256_ctx_mgr *mgr)
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{
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/*
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* If get_comp_job returns NULL, there are no jobs complete.
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* If get_comp_job returns a job, verify that it is safe to return to
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* the user. If it is not ready, resubmit the job to finish processing.
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* If sha256_ctx_mgr_resubmit returned a job, it is ready to be
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* returned. Otherwise, all jobs currently being managed by the
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* hash_ctx_mgr still need processing.
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*/
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struct sha256_hash_ctx *ctx;
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ctx = (struct sha256_hash_ctx *) sha256_job_mgr_get_comp_job(&mgr->mgr);
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return sha256_ctx_mgr_resubmit(mgr, ctx);
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}
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static void sha256_ctx_mgr_init(struct sha256_ctx_mgr *mgr)
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{
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sha256_job_mgr_init(&mgr->mgr);
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}
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static struct sha256_hash_ctx *sha256_ctx_mgr_submit(struct sha256_ctx_mgr *mgr,
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struct sha256_hash_ctx *ctx,
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const void *buffer,
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uint32_t len,
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int flags)
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{
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if (flags & ~(HASH_UPDATE | HASH_LAST)) {
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/* User should not pass anything other than UPDATE or LAST */
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ctx->error = HASH_CTX_ERROR_INVALID_FLAGS;
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return ctx;
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}
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if (ctx->status & HASH_CTX_STS_PROCESSING) {
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/* Cannot submit to a currently processing job. */
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ctx->error = HASH_CTX_ERROR_ALREADY_PROCESSING;
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return ctx;
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}
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if (ctx->status & HASH_CTX_STS_COMPLETE) {
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/* Cannot update a finished job. */
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ctx->error = HASH_CTX_ERROR_ALREADY_COMPLETED;
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return ctx;
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}
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/* If we made it here, there was no error during this call to submit */
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ctx->error = HASH_CTX_ERROR_NONE;
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/* Store buffer ptr info from user */
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ctx->incoming_buffer = buffer;
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ctx->incoming_buffer_length = len;
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/*
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* Store the user's request flags and mark this ctx as currently
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* being processed.
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*/
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ctx->status = (flags & HASH_LAST) ?
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(HASH_CTX_STS_PROCESSING | HASH_CTX_STS_LAST) :
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HASH_CTX_STS_PROCESSING;
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/* Advance byte counter */
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ctx->total_length += len;
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/*
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* If there is anything currently buffered in the extra blocks,
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* append to it until it contains a whole block.
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* Or if the user's buffer contains less than a whole block,
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* append as much as possible to the extra block.
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*/
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if (ctx->partial_block_buffer_length || len < SHA256_BLOCK_SIZE) {
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/*
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* Compute how many bytes to copy from user buffer into
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* extra block
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*/
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uint32_t copy_len = SHA256_BLOCK_SIZE -
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ctx->partial_block_buffer_length;
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if (len < copy_len)
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copy_len = len;
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if (copy_len) {
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/* Copy and update relevant pointers and counters */
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memcpy(
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&ctx->partial_block_buffer[ctx->partial_block_buffer_length],
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buffer, copy_len);
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ctx->partial_block_buffer_length += copy_len;
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ctx->incoming_buffer = (const void *)
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((const char *)buffer + copy_len);
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ctx->incoming_buffer_length = len - copy_len;
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}
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/* The extra block should never contain more than 1 block */
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assert(ctx->partial_block_buffer_length <= SHA256_BLOCK_SIZE);
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/*
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* If the extra block buffer contains exactly 1 block,
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* it can be hashed.
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*/
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if (ctx->partial_block_buffer_length >= SHA256_BLOCK_SIZE) {
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ctx->partial_block_buffer_length = 0;
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ctx->job.buffer = ctx->partial_block_buffer;
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ctx->job.len = 1;
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ctx = (struct sha256_hash_ctx *)
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sha256_job_mgr_submit(&mgr->mgr, &ctx->job);
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}
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}
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return sha256_ctx_mgr_resubmit(mgr, ctx);
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}
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static struct sha256_hash_ctx *sha256_ctx_mgr_flush(struct sha256_ctx_mgr *mgr)
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{
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struct sha256_hash_ctx *ctx;
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while (1) {
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ctx = (struct sha256_hash_ctx *)
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sha256_job_mgr_flush(&mgr->mgr);
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/* If flush returned 0, there are no more jobs in flight. */
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if (!ctx)
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return NULL;
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/*
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* If flush returned a job, resubmit the job to finish
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* processing.
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*/
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ctx = sha256_ctx_mgr_resubmit(mgr, ctx);
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/*
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* If sha256_ctx_mgr_resubmit returned a job, it is ready to
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* be returned. Otherwise, all jobs currently being managed by
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* the sha256_ctx_mgr still need processing. Loop.
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*/
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if (ctx)
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return ctx;
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}
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}
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static int sha256_mb_init(struct ahash_request *areq)
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{
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struct sha256_hash_ctx *sctx = ahash_request_ctx(areq);
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hash_ctx_init(sctx);
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sctx->job.result_digest[0] = SHA256_H0;
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sctx->job.result_digest[1] = SHA256_H1;
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sctx->job.result_digest[2] = SHA256_H2;
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sctx->job.result_digest[3] = SHA256_H3;
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sctx->job.result_digest[4] = SHA256_H4;
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sctx->job.result_digest[5] = SHA256_H5;
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sctx->job.result_digest[6] = SHA256_H6;
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sctx->job.result_digest[7] = SHA256_H7;
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sctx->total_length = 0;
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sctx->partial_block_buffer_length = 0;
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sctx->status = HASH_CTX_STS_IDLE;
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return 0;
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}
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static int sha256_mb_set_results(struct mcryptd_hash_request_ctx *rctx)
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{
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int i;
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struct sha256_hash_ctx *sctx = ahash_request_ctx(&rctx->areq);
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__be32 *dst = (__be32 *) rctx->out;
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for (i = 0; i < 8; ++i)
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dst[i] = cpu_to_be32(sctx->job.result_digest[i]);
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return 0;
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}
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static int sha_finish_walk(struct mcryptd_hash_request_ctx **ret_rctx,
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struct mcryptd_alg_cstate *cstate, bool flush)
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{
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int flag = HASH_UPDATE;
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int nbytes, err = 0;
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struct mcryptd_hash_request_ctx *rctx = *ret_rctx;
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struct sha256_hash_ctx *sha_ctx;
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/* more work ? */
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while (!(rctx->flag & HASH_DONE)) {
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nbytes = crypto_ahash_walk_done(&rctx->walk, 0);
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if (nbytes < 0) {
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err = nbytes;
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goto out;
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}
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/* check if the walk is done */
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if (crypto_ahash_walk_last(&rctx->walk)) {
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rctx->flag |= HASH_DONE;
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if (rctx->flag & HASH_FINAL)
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flag |= HASH_LAST;
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}
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sha_ctx = (struct sha256_hash_ctx *)
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ahash_request_ctx(&rctx->areq);
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kernel_fpu_begin();
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sha_ctx = sha256_ctx_mgr_submit(cstate->mgr, sha_ctx,
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rctx->walk.data, nbytes, flag);
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if (!sha_ctx) {
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if (flush)
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sha_ctx = sha256_ctx_mgr_flush(cstate->mgr);
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}
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kernel_fpu_end();
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if (sha_ctx)
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rctx = cast_hash_to_mcryptd_ctx(sha_ctx);
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else {
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rctx = NULL;
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goto out;
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}
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}
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/* copy the results */
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if (rctx->flag & HASH_FINAL)
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sha256_mb_set_results(rctx);
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out:
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*ret_rctx = rctx;
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return err;
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}
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|
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static int sha_complete_job(struct mcryptd_hash_request_ctx *rctx,
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struct mcryptd_alg_cstate *cstate,
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int err)
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{
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struct ahash_request *req = cast_mcryptd_ctx_to_req(rctx);
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struct sha256_hash_ctx *sha_ctx;
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struct mcryptd_hash_request_ctx *req_ctx;
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int ret;
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/* remove from work list */
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spin_lock(&cstate->work_lock);
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list_del(&rctx->waiter);
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spin_unlock(&cstate->work_lock);
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if (irqs_disabled())
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rctx->complete(&req->base, err);
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else {
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local_bh_disable();
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rctx->complete(&req->base, err);
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local_bh_enable();
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}
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/* check to see if there are other jobs that are done */
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sha_ctx = sha256_ctx_mgr_get_comp_ctx(cstate->mgr);
|
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while (sha_ctx) {
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req_ctx = cast_hash_to_mcryptd_ctx(sha_ctx);
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ret = sha_finish_walk(&req_ctx, cstate, false);
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if (req_ctx) {
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spin_lock(&cstate->work_lock);
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list_del(&req_ctx->waiter);
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spin_unlock(&cstate->work_lock);
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req = cast_mcryptd_ctx_to_req(req_ctx);
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if (irqs_disabled())
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req_ctx->complete(&req->base, ret);
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else {
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local_bh_disable();
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req_ctx->complete(&req->base, ret);
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local_bh_enable();
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}
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}
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sha_ctx = sha256_ctx_mgr_get_comp_ctx(cstate->mgr);
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}
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return 0;
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}
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|
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static void sha256_mb_add_list(struct mcryptd_hash_request_ctx *rctx,
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struct mcryptd_alg_cstate *cstate)
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{
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unsigned long next_flush;
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unsigned long delay = usecs_to_jiffies(FLUSH_INTERVAL);
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|
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/* initialize tag */
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rctx->tag.arrival = jiffies; /* tag the arrival time */
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rctx->tag.seq_num = cstate->next_seq_num++;
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next_flush = rctx->tag.arrival + delay;
|
|
rctx->tag.expire = next_flush;
|
|
|
|
spin_lock(&cstate->work_lock);
|
|
list_add_tail(&rctx->waiter, &cstate->work_list);
|
|
spin_unlock(&cstate->work_lock);
|
|
|
|
mcryptd_arm_flusher(cstate, delay);
|
|
}
|
|
|
|
static int sha256_mb_update(struct ahash_request *areq)
|
|
{
|
|
struct mcryptd_hash_request_ctx *rctx =
|
|
container_of(areq, struct mcryptd_hash_request_ctx, areq);
|
|
struct mcryptd_alg_cstate *cstate =
|
|
this_cpu_ptr(sha256_mb_alg_state.alg_cstate);
|
|
|
|
struct ahash_request *req = cast_mcryptd_ctx_to_req(rctx);
|
|
struct sha256_hash_ctx *sha_ctx;
|
|
int ret = 0, nbytes;
|
|
|
|
/* sanity check */
|
|
if (rctx->tag.cpu != smp_processor_id()) {
|
|
pr_err("mcryptd error: cpu clash\n");
|
|
goto done;
|
|
}
|
|
|
|
/* need to init context */
|
|
req_ctx_init(rctx, areq);
|
|
|
|
nbytes = crypto_ahash_walk_first(req, &rctx->walk);
|
|
|
|
if (nbytes < 0) {
|
|
ret = nbytes;
|
|
goto done;
|
|
}
|
|
|
|
if (crypto_ahash_walk_last(&rctx->walk))
|
|
rctx->flag |= HASH_DONE;
|
|
|
|
/* submit */
|
|
sha_ctx = (struct sha256_hash_ctx *) ahash_request_ctx(areq);
|
|
sha256_mb_add_list(rctx, cstate);
|
|
kernel_fpu_begin();
|
|
sha_ctx = sha256_ctx_mgr_submit(cstate->mgr, sha_ctx, rctx->walk.data,
|
|
nbytes, HASH_UPDATE);
|
|
kernel_fpu_end();
|
|
|
|
/* check if anything is returned */
|
|
if (!sha_ctx)
|
|
return -EINPROGRESS;
|
|
|
|
if (sha_ctx->error) {
|
|
ret = sha_ctx->error;
|
|
rctx = cast_hash_to_mcryptd_ctx(sha_ctx);
|
|
goto done;
|
|
}
|
|
|
|
rctx = cast_hash_to_mcryptd_ctx(sha_ctx);
|
|
ret = sha_finish_walk(&rctx, cstate, false);
|
|
|
|
if (!rctx)
|
|
return -EINPROGRESS;
|
|
done:
|
|
sha_complete_job(rctx, cstate, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int sha256_mb_finup(struct ahash_request *areq)
|
|
{
|
|
struct mcryptd_hash_request_ctx *rctx =
|
|
container_of(areq, struct mcryptd_hash_request_ctx, areq);
|
|
struct mcryptd_alg_cstate *cstate =
|
|
this_cpu_ptr(sha256_mb_alg_state.alg_cstate);
|
|
|
|
struct ahash_request *req = cast_mcryptd_ctx_to_req(rctx);
|
|
struct sha256_hash_ctx *sha_ctx;
|
|
int ret = 0, flag = HASH_UPDATE, nbytes;
|
|
|
|
/* sanity check */
|
|
if (rctx->tag.cpu != smp_processor_id()) {
|
|
pr_err("mcryptd error: cpu clash\n");
|
|
goto done;
|
|
}
|
|
|
|
/* need to init context */
|
|
req_ctx_init(rctx, areq);
|
|
|
|
nbytes = crypto_ahash_walk_first(req, &rctx->walk);
|
|
|
|
if (nbytes < 0) {
|
|
ret = nbytes;
|
|
goto done;
|
|
}
|
|
|
|
if (crypto_ahash_walk_last(&rctx->walk)) {
|
|
rctx->flag |= HASH_DONE;
|
|
flag = HASH_LAST;
|
|
}
|
|
|
|
/* submit */
|
|
rctx->flag |= HASH_FINAL;
|
|
sha_ctx = (struct sha256_hash_ctx *) ahash_request_ctx(areq);
|
|
sha256_mb_add_list(rctx, cstate);
|
|
|
|
kernel_fpu_begin();
|
|
sha_ctx = sha256_ctx_mgr_submit(cstate->mgr, sha_ctx, rctx->walk.data,
|
|
nbytes, flag);
|
|
kernel_fpu_end();
|
|
|
|
/* check if anything is returned */
|
|
if (!sha_ctx)
|
|
return -EINPROGRESS;
|
|
|
|
if (sha_ctx->error) {
|
|
ret = sha_ctx->error;
|
|
goto done;
|
|
}
|
|
|
|
rctx = cast_hash_to_mcryptd_ctx(sha_ctx);
|
|
ret = sha_finish_walk(&rctx, cstate, false);
|
|
if (!rctx)
|
|
return -EINPROGRESS;
|
|
done:
|
|
sha_complete_job(rctx, cstate, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int sha256_mb_final(struct ahash_request *areq)
|
|
{
|
|
struct mcryptd_hash_request_ctx *rctx =
|
|
container_of(areq, struct mcryptd_hash_request_ctx,
|
|
areq);
|
|
struct mcryptd_alg_cstate *cstate =
|
|
this_cpu_ptr(sha256_mb_alg_state.alg_cstate);
|
|
|
|
struct sha256_hash_ctx *sha_ctx;
|
|
int ret = 0;
|
|
u8 data;
|
|
|
|
/* sanity check */
|
|
if (rctx->tag.cpu != smp_processor_id()) {
|
|
pr_err("mcryptd error: cpu clash\n");
|
|
goto done;
|
|
}
|
|
|
|
/* need to init context */
|
|
req_ctx_init(rctx, areq);
|
|
|
|
rctx->flag |= HASH_DONE | HASH_FINAL;
|
|
|
|
sha_ctx = (struct sha256_hash_ctx *) ahash_request_ctx(areq);
|
|
/* flag HASH_FINAL and 0 data size */
|
|
sha256_mb_add_list(rctx, cstate);
|
|
kernel_fpu_begin();
|
|
sha_ctx = sha256_ctx_mgr_submit(cstate->mgr, sha_ctx, &data, 0,
|
|
HASH_LAST);
|
|
kernel_fpu_end();
|
|
|
|
/* check if anything is returned */
|
|
if (!sha_ctx)
|
|
return -EINPROGRESS;
|
|
|
|
if (sha_ctx->error) {
|
|
ret = sha_ctx->error;
|
|
rctx = cast_hash_to_mcryptd_ctx(sha_ctx);
|
|
goto done;
|
|
}
|
|
|
|
rctx = cast_hash_to_mcryptd_ctx(sha_ctx);
|
|
ret = sha_finish_walk(&rctx, cstate, false);
|
|
if (!rctx)
|
|
return -EINPROGRESS;
|
|
done:
|
|
sha_complete_job(rctx, cstate, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int sha256_mb_export(struct ahash_request *areq, void *out)
|
|
{
|
|
struct sha256_hash_ctx *sctx = ahash_request_ctx(areq);
|
|
|
|
memcpy(out, sctx, sizeof(*sctx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sha256_mb_import(struct ahash_request *areq, const void *in)
|
|
{
|
|
struct sha256_hash_ctx *sctx = ahash_request_ctx(areq);
|
|
|
|
memcpy(sctx, in, sizeof(*sctx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sha256_mb_async_init_tfm(struct crypto_tfm *tfm)
|
|
{
|
|
struct mcryptd_ahash *mcryptd_tfm;
|
|
struct sha256_mb_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
struct mcryptd_hash_ctx *mctx;
|
|
|
|
mcryptd_tfm = mcryptd_alloc_ahash("__intel_sha256-mb",
|
|
CRYPTO_ALG_INTERNAL,
|
|
CRYPTO_ALG_INTERNAL);
|
|
if (IS_ERR(mcryptd_tfm))
|
|
return PTR_ERR(mcryptd_tfm);
|
|
mctx = crypto_ahash_ctx(&mcryptd_tfm->base);
|
|
mctx->alg_state = &sha256_mb_alg_state;
|
|
ctx->mcryptd_tfm = mcryptd_tfm;
|
|
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
|
|
sizeof(struct ahash_request) +
|
|
crypto_ahash_reqsize(&mcryptd_tfm->base));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sha256_mb_async_exit_tfm(struct crypto_tfm *tfm)
|
|
{
|
|
struct sha256_mb_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
mcryptd_free_ahash(ctx->mcryptd_tfm);
|
|
}
|
|
|
|
static int sha256_mb_areq_init_tfm(struct crypto_tfm *tfm)
|
|
{
|
|
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
|
|
sizeof(struct ahash_request) +
|
|
sizeof(struct sha256_hash_ctx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sha256_mb_areq_exit_tfm(struct crypto_tfm *tfm)
|
|
{
|
|
struct sha256_mb_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
mcryptd_free_ahash(ctx->mcryptd_tfm);
|
|
}
|
|
|
|
static struct ahash_alg sha256_mb_areq_alg = {
|
|
.init = sha256_mb_init,
|
|
.update = sha256_mb_update,
|
|
.final = sha256_mb_final,
|
|
.finup = sha256_mb_finup,
|
|
.export = sha256_mb_export,
|
|
.import = sha256_mb_import,
|
|
.halg = {
|
|
.digestsize = SHA256_DIGEST_SIZE,
|
|
.statesize = sizeof(struct sha256_hash_ctx),
|
|
.base = {
|
|
.cra_name = "__sha256-mb",
|
|
.cra_driver_name = "__intel_sha256-mb",
|
|
.cra_priority = 100,
|
|
/*
|
|
* use ASYNC flag as some buffers in multi-buffer
|
|
* algo may not have completed before hashing thread
|
|
* sleep
|
|
*/
|
|
.cra_flags = CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_INTERNAL,
|
|
.cra_blocksize = SHA256_BLOCK_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_list = LIST_HEAD_INIT
|
|
(sha256_mb_areq_alg.halg.base.cra_list),
|
|
.cra_init = sha256_mb_areq_init_tfm,
|
|
.cra_exit = sha256_mb_areq_exit_tfm,
|
|
.cra_ctxsize = sizeof(struct sha256_hash_ctx),
|
|
}
|
|
}
|
|
};
|
|
|
|
static int sha256_mb_async_init(struct ahash_request *req)
|
|
{
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
|
|
struct sha256_mb_ctx *ctx = crypto_ahash_ctx(tfm);
|
|
struct ahash_request *mcryptd_req = ahash_request_ctx(req);
|
|
struct mcryptd_ahash *mcryptd_tfm = ctx->mcryptd_tfm;
|
|
|
|
memcpy(mcryptd_req, req, sizeof(*req));
|
|
ahash_request_set_tfm(mcryptd_req, &mcryptd_tfm->base);
|
|
return crypto_ahash_init(mcryptd_req);
|
|
}
|
|
|
|
static int sha256_mb_async_update(struct ahash_request *req)
|
|
{
|
|
struct ahash_request *mcryptd_req = ahash_request_ctx(req);
|
|
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
|
|
struct sha256_mb_ctx *ctx = crypto_ahash_ctx(tfm);
|
|
struct mcryptd_ahash *mcryptd_tfm = ctx->mcryptd_tfm;
|
|
|
|
memcpy(mcryptd_req, req, sizeof(*req));
|
|
ahash_request_set_tfm(mcryptd_req, &mcryptd_tfm->base);
|
|
return crypto_ahash_update(mcryptd_req);
|
|
}
|
|
|
|
static int sha256_mb_async_finup(struct ahash_request *req)
|
|
{
|
|
struct ahash_request *mcryptd_req = ahash_request_ctx(req);
|
|
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
|
|
struct sha256_mb_ctx *ctx = crypto_ahash_ctx(tfm);
|
|
struct mcryptd_ahash *mcryptd_tfm = ctx->mcryptd_tfm;
|
|
|
|
memcpy(mcryptd_req, req, sizeof(*req));
|
|
ahash_request_set_tfm(mcryptd_req, &mcryptd_tfm->base);
|
|
return crypto_ahash_finup(mcryptd_req);
|
|
}
|
|
|
|
static int sha256_mb_async_final(struct ahash_request *req)
|
|
{
|
|
struct ahash_request *mcryptd_req = ahash_request_ctx(req);
|
|
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
|
|
struct sha256_mb_ctx *ctx = crypto_ahash_ctx(tfm);
|
|
struct mcryptd_ahash *mcryptd_tfm = ctx->mcryptd_tfm;
|
|
|
|
memcpy(mcryptd_req, req, sizeof(*req));
|
|
ahash_request_set_tfm(mcryptd_req, &mcryptd_tfm->base);
|
|
return crypto_ahash_final(mcryptd_req);
|
|
}
|
|
|
|
static int sha256_mb_async_digest(struct ahash_request *req)
|
|
{
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
|
|
struct sha256_mb_ctx *ctx = crypto_ahash_ctx(tfm);
|
|
struct ahash_request *mcryptd_req = ahash_request_ctx(req);
|
|
struct mcryptd_ahash *mcryptd_tfm = ctx->mcryptd_tfm;
|
|
|
|
memcpy(mcryptd_req, req, sizeof(*req));
|
|
ahash_request_set_tfm(mcryptd_req, &mcryptd_tfm->base);
|
|
return crypto_ahash_digest(mcryptd_req);
|
|
}
|
|
|
|
static int sha256_mb_async_export(struct ahash_request *req, void *out)
|
|
{
|
|
struct ahash_request *mcryptd_req = ahash_request_ctx(req);
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
|
|
struct sha256_mb_ctx *ctx = crypto_ahash_ctx(tfm);
|
|
struct mcryptd_ahash *mcryptd_tfm = ctx->mcryptd_tfm;
|
|
|
|
memcpy(mcryptd_req, req, sizeof(*req));
|
|
ahash_request_set_tfm(mcryptd_req, &mcryptd_tfm->base);
|
|
return crypto_ahash_export(mcryptd_req, out);
|
|
}
|
|
|
|
static int sha256_mb_async_import(struct ahash_request *req, const void *in)
|
|
{
|
|
struct ahash_request *mcryptd_req = ahash_request_ctx(req);
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
|
|
struct sha256_mb_ctx *ctx = crypto_ahash_ctx(tfm);
|
|
struct mcryptd_ahash *mcryptd_tfm = ctx->mcryptd_tfm;
|
|
struct crypto_ahash *child = mcryptd_ahash_child(mcryptd_tfm);
|
|
struct mcryptd_hash_request_ctx *rctx;
|
|
struct ahash_request *areq;
|
|
|
|
memcpy(mcryptd_req, req, sizeof(*req));
|
|
ahash_request_set_tfm(mcryptd_req, &mcryptd_tfm->base);
|
|
rctx = ahash_request_ctx(mcryptd_req);
|
|
areq = &rctx->areq;
|
|
|
|
ahash_request_set_tfm(areq, child);
|
|
ahash_request_set_callback(areq, CRYPTO_TFM_REQ_MAY_SLEEP,
|
|
rctx->complete, req);
|
|
|
|
return crypto_ahash_import(mcryptd_req, in);
|
|
}
|
|
|
|
static struct ahash_alg sha256_mb_async_alg = {
|
|
.init = sha256_mb_async_init,
|
|
.update = sha256_mb_async_update,
|
|
.final = sha256_mb_async_final,
|
|
.finup = sha256_mb_async_finup,
|
|
.export = sha256_mb_async_export,
|
|
.import = sha256_mb_async_import,
|
|
.digest = sha256_mb_async_digest,
|
|
.halg = {
|
|
.digestsize = SHA256_DIGEST_SIZE,
|
|
.statesize = sizeof(struct sha256_hash_ctx),
|
|
.base = {
|
|
.cra_name = "sha256",
|
|
.cra_driver_name = "sha256_mb",
|
|
/*
|
|
* Low priority, since with few concurrent hash requests
|
|
* this is extremely slow due to the flush delay. Users
|
|
* whose workloads would benefit from this can request
|
|
* it explicitly by driver name, or can increase its
|
|
* priority at runtime using NETLINK_CRYPTO.
|
|
*/
|
|
.cra_priority = 50,
|
|
.cra_flags = CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = SHA256_BLOCK_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_list = LIST_HEAD_INIT
|
|
(sha256_mb_async_alg.halg.base.cra_list),
|
|
.cra_init = sha256_mb_async_init_tfm,
|
|
.cra_exit = sha256_mb_async_exit_tfm,
|
|
.cra_ctxsize = sizeof(struct sha256_mb_ctx),
|
|
.cra_alignmask = 0,
|
|
},
|
|
},
|
|
};
|
|
|
|
static unsigned long sha256_mb_flusher(struct mcryptd_alg_cstate *cstate)
|
|
{
|
|
struct mcryptd_hash_request_ctx *rctx;
|
|
unsigned long cur_time;
|
|
unsigned long next_flush = 0;
|
|
struct sha256_hash_ctx *sha_ctx;
|
|
|
|
|
|
cur_time = jiffies;
|
|
|
|
while (!list_empty(&cstate->work_list)) {
|
|
rctx = list_entry(cstate->work_list.next,
|
|
struct mcryptd_hash_request_ctx, waiter);
|
|
if (time_before(cur_time, rctx->tag.expire))
|
|
break;
|
|
kernel_fpu_begin();
|
|
sha_ctx = (struct sha256_hash_ctx *)
|
|
sha256_ctx_mgr_flush(cstate->mgr);
|
|
kernel_fpu_end();
|
|
if (!sha_ctx) {
|
|
pr_err("sha256_mb error: nothing got"
|
|
" flushed for non-empty list\n");
|
|
break;
|
|
}
|
|
rctx = cast_hash_to_mcryptd_ctx(sha_ctx);
|
|
sha_finish_walk(&rctx, cstate, true);
|
|
sha_complete_job(rctx, cstate, 0);
|
|
}
|
|
|
|
if (!list_empty(&cstate->work_list)) {
|
|
rctx = list_entry(cstate->work_list.next,
|
|
struct mcryptd_hash_request_ctx, waiter);
|
|
/* get the hash context and then flush time */
|
|
next_flush = rctx->tag.expire;
|
|
mcryptd_arm_flusher(cstate, get_delay(next_flush));
|
|
}
|
|
return next_flush;
|
|
}
|
|
|
|
static int __init sha256_mb_mod_init(void)
|
|
{
|
|
|
|
int cpu;
|
|
int err;
|
|
struct mcryptd_alg_cstate *cpu_state;
|
|
|
|
/* check for dependent cpu features */
|
|
if (!boot_cpu_has(X86_FEATURE_AVX2) ||
|
|
!boot_cpu_has(X86_FEATURE_BMI2))
|
|
return -ENODEV;
|
|
|
|
/* initialize multibuffer structures */
|
|
sha256_mb_alg_state.alg_cstate = alloc_percpu
|
|
(struct mcryptd_alg_cstate);
|
|
|
|
sha256_job_mgr_init = sha256_mb_mgr_init_avx2;
|
|
sha256_job_mgr_submit = sha256_mb_mgr_submit_avx2;
|
|
sha256_job_mgr_flush = sha256_mb_mgr_flush_avx2;
|
|
sha256_job_mgr_get_comp_job = sha256_mb_mgr_get_comp_job_avx2;
|
|
|
|
if (!sha256_mb_alg_state.alg_cstate)
|
|
return -ENOMEM;
|
|
for_each_possible_cpu(cpu) {
|
|
cpu_state = per_cpu_ptr(sha256_mb_alg_state.alg_cstate, cpu);
|
|
cpu_state->next_flush = 0;
|
|
cpu_state->next_seq_num = 0;
|
|
cpu_state->flusher_engaged = false;
|
|
INIT_DELAYED_WORK(&cpu_state->flush, mcryptd_flusher);
|
|
cpu_state->cpu = cpu;
|
|
cpu_state->alg_state = &sha256_mb_alg_state;
|
|
cpu_state->mgr = kzalloc(sizeof(struct sha256_ctx_mgr),
|
|
GFP_KERNEL);
|
|
if (!cpu_state->mgr)
|
|
goto err2;
|
|
sha256_ctx_mgr_init(cpu_state->mgr);
|
|
INIT_LIST_HEAD(&cpu_state->work_list);
|
|
spin_lock_init(&cpu_state->work_lock);
|
|
}
|
|
sha256_mb_alg_state.flusher = &sha256_mb_flusher;
|
|
|
|
err = crypto_register_ahash(&sha256_mb_areq_alg);
|
|
if (err)
|
|
goto err2;
|
|
err = crypto_register_ahash(&sha256_mb_async_alg);
|
|
if (err)
|
|
goto err1;
|
|
|
|
|
|
return 0;
|
|
err1:
|
|
crypto_unregister_ahash(&sha256_mb_areq_alg);
|
|
err2:
|
|
for_each_possible_cpu(cpu) {
|
|
cpu_state = per_cpu_ptr(sha256_mb_alg_state.alg_cstate, cpu);
|
|
kfree(cpu_state->mgr);
|
|
}
|
|
free_percpu(sha256_mb_alg_state.alg_cstate);
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void __exit sha256_mb_mod_fini(void)
|
|
{
|
|
int cpu;
|
|
struct mcryptd_alg_cstate *cpu_state;
|
|
|
|
crypto_unregister_ahash(&sha256_mb_async_alg);
|
|
crypto_unregister_ahash(&sha256_mb_areq_alg);
|
|
for_each_possible_cpu(cpu) {
|
|
cpu_state = per_cpu_ptr(sha256_mb_alg_state.alg_cstate, cpu);
|
|
kfree(cpu_state->mgr);
|
|
}
|
|
free_percpu(sha256_mb_alg_state.alg_cstate);
|
|
}
|
|
|
|
module_init(sha256_mb_mod_init);
|
|
module_exit(sha256_mb_mod_fini);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm, multi buffer accelerated");
|
|
|
|
MODULE_ALIAS_CRYPTO("sha256");
|