93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
/*
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* sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions
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*
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* Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
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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 version 2 as
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* published by the Free Software Foundation.
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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/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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MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions");
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MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
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MODULE_LICENSE("GPL v2");
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asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src,
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int blocks);
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static int sm3_ce_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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if (!may_use_simd())
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return crypto_sm3_update(desc, data, len);
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kernel_neon_begin();
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sm3_base_do_update(desc, data, len, sm3_ce_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_ce_final(struct shash_desc *desc, u8 *out)
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{
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if (!may_use_simd())
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return crypto_sm3_finup(desc, NULL, 0, out);
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kernel_neon_begin();
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sm3_base_do_finalize(desc, sm3_ce_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_ce_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 (!may_use_simd())
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return crypto_sm3_finup(desc, data, len, out);
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kernel_neon_begin();
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sm3_base_do_update(desc, data, len, sm3_ce_transform);
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kernel_neon_end();
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return sm3_ce_final(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_ce_update,
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.final = sm3_ce_final,
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.finup = sm3_ce_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-ce",
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.base.cra_flags = CRYPTO_ALG_TYPE_SHASH,
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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_ce_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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static void __exit sm3_ce_mod_fini(void)
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{
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crypto_unregister_shash(&sm3_alg);
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}
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module_cpu_feature_match(SM3, sm3_ce_mod_init);
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module_exit(sm3_ce_mod_fini);
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