104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* sm3-neon-glue.c - SM3 secure hash using NEON instructions
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*
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* Copyright (C) 2022 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
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*/
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#include <asm/neon.h>
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#include <asm/simd.h>
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#include <asm/unaligned.h>
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#include <crypto/internal/hash.h>
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#include <crypto/internal/simd.h>
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#include <crypto/sm3.h>
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#include <crypto/sm3_base.h>
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#include <linux/cpufeature.h>
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#include <linux/crypto.h>
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#include <linux/module.h>
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asmlinkage void sm3_neon_transform(struct sm3_state *sst, u8 const *src,
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int blocks);
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static int sm3_neon_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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if (!crypto_simd_usable()) {
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sm3_update(shash_desc_ctx(desc), data, len);
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return 0;
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}
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kernel_neon_begin();
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sm3_base_do_update(desc, data, len, sm3_neon_transform);
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kernel_neon_end();
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return 0;
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}
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static int sm3_neon_final(struct shash_desc *desc, u8 *out)
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{
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if (!crypto_simd_usable()) {
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sm3_final(shash_desc_ctx(desc), out);
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return 0;
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}
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kernel_neon_begin();
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sm3_base_do_finalize(desc, sm3_neon_transform);
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kernel_neon_end();
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return sm3_base_finish(desc, out);
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}
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static int sm3_neon_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out)
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{
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if (!crypto_simd_usable()) {
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struct sm3_state *sctx = shash_desc_ctx(desc);
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if (len)
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sm3_update(sctx, data, len);
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sm3_final(sctx, out);
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return 0;
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}
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kernel_neon_begin();
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if (len)
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sm3_base_do_update(desc, data, len, sm3_neon_transform);
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sm3_base_do_finalize(desc, sm3_neon_transform);
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kernel_neon_end();
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return sm3_base_finish(desc, out);
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}
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static struct shash_alg sm3_alg = {
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.digestsize = SM3_DIGEST_SIZE,
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.init = sm3_base_init,
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.update = sm3_neon_update,
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.final = sm3_neon_final,
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.finup = sm3_neon_finup,
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.descsize = sizeof(struct sm3_state),
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.base.cra_name = "sm3",
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.base.cra_driver_name = "sm3-neon",
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.base.cra_blocksize = SM3_BLOCK_SIZE,
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.base.cra_module = THIS_MODULE,
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.base.cra_priority = 200,
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};
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static int __init sm3_neon_init(void)
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{
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return crypto_register_shash(&sm3_alg);
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}
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static void __exit sm3_neon_fini(void)
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{
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crypto_unregister_shash(&sm3_alg);
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}
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module_init(sm3_neon_init);
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module_exit(sm3_neon_fini);
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MODULE_DESCRIPTION("SM3 secure hash using NEON instructions");
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MODULE_AUTHOR("Jussi Kivilinna <jussi.kivilinna@iki.fi>");
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MODULE_AUTHOR("Tianjia Zhang <tianjia.zhang@linux.alibaba.com>");
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MODULE_LICENSE("GPL v2");
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