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// SPDX-License-Identifier: GPL-2.0-only
/*
* sha1-ce-glue.c - SHA-1 secure hash using ARMv8 Crypto Extensions
*
* Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
*/
#include <asm/neon.h>
#include <crypto/internal/hash.h>
#include <crypto/sha1.h>
#include <crypto/sha1_base.h>
#include <linux/cpufeature.h>
#include <linux/kernel.h>
#include <linux/module.h>
MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
MODULE_LICENSE("GPL v2");
asmlinkage void sha1_ce_transform(struct sha1_state *sst, u8 const *src,
int blocks);
static int sha1_ce_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
int remain;
kernel_neon_begin();
remain = sha1_base_do_update_blocks(desc, data, len, sha1_ce_transform);
kernel_neon_end();
return remain;
}
static int sha1_ce_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out)
{
kernel_neon_begin();
sha1_base_do_finup(desc, data, len, sha1_ce_transform);
kernel_neon_end();
return sha1_base_finish(desc, out);
}
static struct shash_alg alg = {
.init = sha1_base_init,
.update = sha1_ce_update,
.finup = sha1_ce_finup,
.descsize = SHA1_STATE_SIZE,
.digestsize = SHA1_DIGEST_SIZE,
.base = {
.cra_name = "sha1",
.cra_driver_name = "sha1-ce",
.cra_priority = 200,
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init sha1_ce_mod_init(void)
{
return crypto_register_shash(&alg);
}
static void __exit sha1_ce_mod_fini(void)
{
crypto_unregister_shash(&alg);
}
module_cpu_feature_match(SHA1, sha1_ce_mod_init);
module_exit(sha1_ce_mod_fini);
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