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ed065bd06e
Reimplement the "sm3" crypto_shash on top of the SM3 library, closely mirroring the other hash algorithms (e.g. SHA-*). The result, after later commits migrate the architecture-optimized SM3 code into the library as well, is that crypto/sm3.c will be the single point of integration between crypto_shash and the actual SM3 implementations, simplifying the code. Note: to see the diff from crypto/sm3_generic.c to crypto/sm3.c, view this commit with 'git show -M10'. Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20260321040935.410034-7-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
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* described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
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*
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* Copyright (C) 2017 ARM Limited or its affiliates.
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* Written by Gilad Ben-Yossef <gilad@benyossef.com>
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* Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
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* Copyright 2026 Google LLC
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*/
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#include <crypto/internal/hash.h>
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#include <crypto/sm3.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#define SM3_CTX(desc) ((struct sm3_ctx *)shash_desc_ctx(desc))
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static int crypto_sm3_init(struct shash_desc *desc)
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{
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sm3_init(SM3_CTX(desc));
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return 0;
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}
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static int crypto_sm3_update(struct shash_desc *desc,
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const u8 *data, unsigned int len)
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{
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sm3_update(SM3_CTX(desc), data, len);
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return 0;
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}
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static int crypto_sm3_final(struct shash_desc *desc, u8 *out)
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{
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sm3_final(SM3_CTX(desc), out);
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return 0;
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}
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static int crypto_sm3_digest(struct shash_desc *desc,
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const u8 *data, unsigned int len, u8 *out)
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{
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sm3(data, len, out);
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return 0;
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}
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static int crypto_sm3_export_core(struct shash_desc *desc, void *out)
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{
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memcpy(out, SM3_CTX(desc), sizeof(struct sm3_ctx));
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return 0;
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}
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static int crypto_sm3_import_core(struct shash_desc *desc, const void *in)
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{
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memcpy(SM3_CTX(desc), in, sizeof(struct sm3_ctx));
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return 0;
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}
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static struct shash_alg sm3_alg = {
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.base.cra_name = "sm3",
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.base.cra_driver_name = "sm3-lib",
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.base.cra_priority = 300,
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.base.cra_blocksize = SM3_BLOCK_SIZE,
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.base.cra_module = THIS_MODULE,
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.digestsize = SM3_DIGEST_SIZE,
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.init = crypto_sm3_init,
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.update = crypto_sm3_update,
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.final = crypto_sm3_final,
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.digest = crypto_sm3_digest,
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.export_core = crypto_sm3_export_core,
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.import_core = crypto_sm3_import_core,
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.descsize = sizeof(struct sm3_ctx),
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};
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static int __init crypto_sm3_mod_init(void)
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{
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return crypto_register_shash(&sm3_alg);
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}
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module_init(crypto_sm3_mod_init);
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static void __exit crypto_sm3_mod_exit(void)
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{
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crypto_unregister_shash(&sm3_alg);
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}
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module_exit(crypto_sm3_mod_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("Crypto API support for SM3");
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MODULE_ALIAS_CRYPTO("sm3");
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MODULE_ALIAS_CRYPTO("sm3-lib");
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