LXR linux/arch/arm64/crypto/sm3-ce-glue.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions
   4 *
   5 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
   6 */
   7
   8#include <asm/neon.h>
   9#include <asm/simd.h>
  10#include <asm/unaligned.h>
  11#include <crypto/internal/hash.h>
  12#include <crypto/internal/simd.h>
  13#include <crypto/sm3.h>
  14#include <crypto/sm3_base.h>
  15#include <linux/cpufeature.h>
  16#include <linux/crypto.h>
  17#include <linux/module.h>
  18
  19MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions");
  20MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
  21MODULE_LICENSE("GPL v2");
  22
  23asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src,
  24                                 int blocks);
  25
  26static int sm3_ce_update(struct shash_desc *desc, const u8 *data,
  27                         unsigned int len)
  28{
  29        if (!crypto_simd_usable())
  30                return crypto_sm3_update(desc, data, len);
  31
  32        kernel_neon_begin();
  33        sm3_base_do_update(desc, data, len, sm3_ce_transform);
  34        kernel_neon_end();
  35
  36        return 0;
  37}
  38
  39static int sm3_ce_final(struct shash_desc *desc, u8 *out)
  40{
  41        if (!crypto_simd_usable())
  42                return crypto_sm3_finup(desc, NULL, 0, out);
  43
  44        kernel_neon_begin();
  45        sm3_base_do_finalize(desc, sm3_ce_transform);
  46        kernel_neon_end();
  47
  48        return sm3_base_finish(desc, out);
  49}
  50
  51static int sm3_ce_finup(struct shash_desc *desc, const u8 *data,
  52                        unsigned int len, u8 *out)
  53{
  54        if (!crypto_simd_usable())
  55                return crypto_sm3_finup(desc, data, len, out);
  56
  57        kernel_neon_begin();
  58        sm3_base_do_update(desc, data, len, sm3_ce_transform);
  59        kernel_neon_end();
  60
  61        return sm3_ce_final(desc, out);
  62}
  63
  64static struct shash_alg sm3_alg = {
  65        .digestsize             = SM3_DIGEST_SIZE,
  66        .init                   = sm3_base_init,
  67        .update                 = sm3_ce_update,
  68        .final                  = sm3_ce_final,
  69        .finup                  = sm3_ce_finup,
  70        .descsize               = sizeof(struct sm3_state),
  71        .base.cra_name          = "sm3",
  72        .base.cra_driver_name   = "sm3-ce",
  73        .base.cra_blocksize     = SM3_BLOCK_SIZE,
  74        .base.cra_module        = THIS_MODULE,
  75        .base.cra_priority      = 200,
  76};
  77
  78static int __init sm3_ce_mod_init(void)
  79{
  80        return crypto_register_shash(&sm3_alg);
  81}
  82
  83static void __exit sm3_ce_mod_fini(void)
  84{
  85        crypto_unregister_shash(&sm3_alg);
  86}
  87
  88module_cpu_feature_match(SM3, sm3_ce_mod_init);
  89module_exit(sm3_ce_mod_fini);
  90