1 /* SPDX-License-Identifier: GPL-2.0 */
3 * sha512-ce-glue.c - SHA-384/SHA-512 using ARMv8 Crypto Extensions
5 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
14 #include <asm/unaligned.h>
15 #include <crypto/internal/hash.h>
16 #include <crypto/internal/simd.h>
17 #include <crypto/sha.h>
18 #include <crypto/sha512_base.h>
19 #include <linux/cpufeature.h>
20 #include <linux/crypto.h>
21 #include <linux/module.h>
23 MODULE_DESCRIPTION("SHA-384/SHA-512 secure hash using ARMv8 Crypto Extensions");
24 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
25 MODULE_LICENSE("GPL v2");
26 MODULE_ALIAS_CRYPTO("sha384");
27 MODULE_ALIAS_CRYPTO("sha512");
29 asmlinkage void sha512_ce_transform(struct sha512_state *sst, u8 const *src,
32 asmlinkage void sha512_block_data_order(u64 *digest, u8 const *src, int blocks);
34 static int sha512_ce_update(struct shash_desc *desc, const u8 *data,
37 if (!crypto_simd_usable())
38 return sha512_base_do_update(desc, data, len,
39 (sha512_block_fn *)sha512_block_data_order);
42 sha512_base_do_update(desc, data, len,
43 (sha512_block_fn *)sha512_ce_transform);
49 static int sha512_ce_finup(struct shash_desc *desc, const u8 *data,
50 unsigned int len, u8 *out)
52 if (!crypto_simd_usable()) {
54 sha512_base_do_update(desc, data, len,
55 (sha512_block_fn *)sha512_block_data_order);
56 sha512_base_do_finalize(desc,
57 (sha512_block_fn *)sha512_block_data_order);
58 return sha512_base_finish(desc, out);
62 sha512_base_do_update(desc, data, len,
63 (sha512_block_fn *)sha512_ce_transform);
64 sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform);
66 return sha512_base_finish(desc, out);
69 static int sha512_ce_final(struct shash_desc *desc, u8 *out)
71 if (!crypto_simd_usable()) {
72 sha512_base_do_finalize(desc,
73 (sha512_block_fn *)sha512_block_data_order);
74 return sha512_base_finish(desc, out);
78 sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform);
80 return sha512_base_finish(desc, out);
83 static struct shash_alg algs[] = { {
84 .init = sha384_base_init,
85 .update = sha512_ce_update,
86 .final = sha512_ce_final,
87 .finup = sha512_ce_finup,
88 .descsize = sizeof(struct sha512_state),
89 .digestsize = SHA384_DIGEST_SIZE,
90 .base.cra_name = "sha384",
91 .base.cra_driver_name = "sha384-ce",
92 .base.cra_priority = 200,
93 .base.cra_blocksize = SHA512_BLOCK_SIZE,
94 .base.cra_module = THIS_MODULE,
96 .init = sha512_base_init,
97 .update = sha512_ce_update,
98 .final = sha512_ce_final,
99 .finup = sha512_ce_finup,
100 .descsize = sizeof(struct sha512_state),
101 .digestsize = SHA512_DIGEST_SIZE,
102 .base.cra_name = "sha512",
103 .base.cra_driver_name = "sha512-ce",
104 .base.cra_priority = 200,
105 .base.cra_blocksize = SHA512_BLOCK_SIZE,
106 .base.cra_module = THIS_MODULE,
109 static int __init sha512_ce_mod_init(void)
111 return crypto_register_shashes(algs, ARRAY_SIZE(algs));
114 static void __exit sha512_ce_mod_fini(void)
116 crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
119 module_cpu_feature_match(SHA512, sha512_ce_mod_init);
120 module_exit(sha512_ce_mod_fini);