1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * sha512-glue.c - accelerated SHA-384/512 for ARM
  4 *
  5 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
  6 */
  7
  8#include <crypto/internal/hash.h>
  9#include <crypto/sha.h>
 10#include <crypto/sha512_base.h>
 11#include <linux/crypto.h>
 12#include <linux/module.h>
 13
 14#include <asm/hwcap.h>
 15#include <asm/neon.h>
 16
 17#include "sha512.h"
 18
 19MODULE_DESCRIPTION("Accelerated SHA-384/SHA-512 secure hash for ARM");
 20MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
 21MODULE_LICENSE("GPL v2");
 22
 23MODULE_ALIAS_CRYPTO("sha384");
 24MODULE_ALIAS_CRYPTO("sha512");
 25MODULE_ALIAS_CRYPTO("sha384-arm");
 26MODULE_ALIAS_CRYPTO("sha512-arm");
 27
 28asmlinkage void sha512_block_data_order(u64 *state, u8 const *src, int blocks);
 29
 30int sha512_arm_update(struct shash_desc *desc, const u8 *data,
 31		      unsigned int len)
 32{
 33	return sha512_base_do_update(desc, data, len,
 34		(sha512_block_fn *)sha512_block_data_order);
 35}
 36
 37static int sha512_arm_final(struct shash_desc *desc, u8 *out)
 38{
 39	sha512_base_do_finalize(desc,
 40		(sha512_block_fn *)sha512_block_data_order);
 41	return sha512_base_finish(desc, out);
 42}
 43
 44int sha512_arm_finup(struct shash_desc *desc, const u8 *data,
 45		     unsigned int len, u8 *out)
 46{
 47	sha512_base_do_update(desc, data, len,
 48		(sha512_block_fn *)sha512_block_data_order);
 49	return sha512_arm_final(desc, out);
 50}
 51
 52static struct shash_alg sha512_arm_algs[] = { {
 53	.init			= sha384_base_init,
 54	.update			= sha512_arm_update,
 55	.final			= sha512_arm_final,
 56	.finup			= sha512_arm_finup,
 57	.descsize		= sizeof(struct sha512_state),
 58	.digestsize		= SHA384_DIGEST_SIZE,
 59	.base			= {
 60		.cra_name		= "sha384",
 61		.cra_driver_name	= "sha384-arm",
 62		.cra_priority		= 250,
 63		.cra_blocksize		= SHA512_BLOCK_SIZE,
 64		.cra_module		= THIS_MODULE,
 65	}
 66},  {
 67	.init			= sha512_base_init,
 68	.update			= sha512_arm_update,
 69	.final			= sha512_arm_final,
 70	.finup			= sha512_arm_finup,
 71	.descsize		= sizeof(struct sha512_state),
 72	.digestsize		= SHA512_DIGEST_SIZE,
 73	.base			= {
 74		.cra_name		= "sha512",
 75		.cra_driver_name	= "sha512-arm",
 76		.cra_priority		= 250,
 77		.cra_blocksize		= SHA512_BLOCK_SIZE,
 78		.cra_module		= THIS_MODULE,
 79	}
 80} };
 81
 82static int __init sha512_arm_mod_init(void)
 83{
 84	int err;
 85
 86	err = crypto_register_shashes(sha512_arm_algs,
 87				      ARRAY_SIZE(sha512_arm_algs));
 88	if (err)
 89		return err;
 90
 91	if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) {
 92		err = crypto_register_shashes(sha512_neon_algs,
 93					      ARRAY_SIZE(sha512_neon_algs));
 94		if (err)
 95			goto err_unregister;
 96	}
 97	return 0;
 98
 99err_unregister:
100	crypto_unregister_shashes(sha512_arm_algs,
101				  ARRAY_SIZE(sha512_arm_algs));
102
103	return err;
104}
105
106static void __exit sha512_arm_mod_fini(void)
107{
108	crypto_unregister_shashes(sha512_arm_algs,
109				  ARRAY_SIZE(sha512_arm_algs));
110	if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon())
111		crypto_unregister_shashes(sha512_neon_algs,
112					  ARRAY_SIZE(sha512_neon_algs));
113}
114
115module_init(sha512_arm_mod_init);
116module_exit(sha512_arm_mod_fini);