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/*
* sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions
*
* Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <asm/neon.h>
#include <asm/simd.h>
#include <asm/unaligned.h>
#include <crypto/internal/hash.h>
#include <crypto/sm3.h>
#include <crypto/sm3_base.h>
#include <linux/cpufeature.h>
#include <linux/crypto.h>
#include <linux/module.h>
MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
MODULE_LICENSE("GPL v2");
asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src,
int blocks);
static int sm3_ce_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
if (!may_use_simd())
return crypto_sm3_update(desc, data, len);
kernel_neon_begin();
sm3_base_do_update(desc, data, len, sm3_ce_transform);
kernel_neon_end();
return 0;
}
static int sm3_ce_final(struct shash_desc *desc, u8 *out)
{
if (!may_use_simd())
return crypto_sm3_finup(desc, NULL, 0, out);
kernel_neon_begin();
sm3_base_do_finalize(desc, sm3_ce_transform);
kernel_neon_end();
return sm3_base_finish(desc, out);
}
static int sm3_ce_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out)
{
if (!may_use_simd())
return crypto_sm3_finup(desc, data, len, out);
kernel_neon_begin();
sm3_base_do_update(desc, data, len, sm3_ce_transform);
kernel_neon_end();
return sm3_ce_final(desc, out);
}
static struct shash_alg sm3_alg = {
.digestsize = SM3_DIGEST_SIZE,
.init = sm3_base_init,
.update = sm3_ce_update,
.final = sm3_ce_final,
.finup = sm3_ce_finup,
.descsize = sizeof(struct sm3_state),
.base.cra_name = "sm3",
.base.cra_driver_name = "sm3-ce",
.base.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.base.cra_blocksize = SM3_BLOCK_SIZE,
.base.cra_module = THIS_MODULE,
.base.cra_priority = 200,
};
static int __init sm3_ce_mod_init(void)
{
return crypto_register_shash(&sm3_alg);
}
static void __exit sm3_ce_mod_fini(void)
{
crypto_unregister_shash(&sm3_alg);
}
module_cpu_feature_match(SM3, sm3_ce_mod_init);
module_exit(sm3_ce_mod_fini);
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