1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Linux/arm64 port of the OpenSSL SHA512 implementation for AArch64
4 *
5 * Copyright (c) 2016 Linaro Ltd. <ard.biesheuvel@linaro.org>
6 */
7
8 #include <crypto/internal/hash.h>
9 #include <linux/types.h>
10 #include <linux/string.h>
11 #include <crypto/sha2.h>
12 #include <crypto/sha512_base.h>
13 #include <asm/neon.h>
14
15 MODULE_DESCRIPTION("SHA-384/SHA-512 secure hash for arm64");
16 MODULE_AUTHOR("Andy Polyakov <appro@openssl.org>");
17 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
18 MODULE_LICENSE("GPL v2");
19 MODULE_ALIAS_CRYPTO("sha384");
20 MODULE_ALIAS_CRYPTO("sha512");
21
22 asmlinkage void sha512_block_data_order(u64 *digest, const void *data,
23 unsigned int num_blks);
24 EXPORT_SYMBOL(sha512_block_data_order);
25
26 static void sha512_arm64_transform(struct sha512_state *sst, u8 const *src,
27 int blocks)
28 {
29 sha512_block_data_order(sst->state, src, blocks);
30 }
31
32 static int sha512_update(struct shash_desc *desc, const u8 *data,
33 unsigned int len)
34 {
35 return sha512_base_do_update(desc, data, len, sha512_arm64_transform);
36 }
37
38 static int sha512_finup(struct shash_desc *desc, const u8 *data,
39 unsigned int len, u8 *out)
40 {
41 if (len)
42 sha512_base_do_update(desc, data, len, sha512_arm64_transform);
43 sha512_base_do_finalize(desc, sha512_arm64_transform);
44
45 return sha512_base_finish(desc, out);
46 }
47
48 static int sha512_final(struct shash_desc *desc, u8 *out)
49 {
50 return sha512_finup(desc, NULL, 0, out);
51 }
52
53 static struct shash_alg algs[] = { {
54 .digestsize = SHA512_DIGEST_SIZE,
55 .init = sha512_base_init,
56 .update = sha512_update,
57 .final = sha512_final,
58 .finup = sha512_finup,
59 .descsize = sizeof(struct sha512_state),
60 .base.cra_name = "sha512",
61 .base.cra_driver_name = "sha512-arm64",
62 .base.cra_priority = 150,
63 .base.cra_blocksize = SHA512_BLOCK_SIZE,
64 .base.cra_module = THIS_MODULE,
65 }, {
66 .digestsize = SHA384_DIGEST_SIZE,
67 .init = sha384_base_init,
68 .update = sha512_update,
69 .final = sha512_final,
70 .finup = sha512_finup,
71 .descsize = sizeof(struct sha512_state),
72 .base.cra_name = "sha384",
73 .base.cra_driver_name = "sha384-arm64",
74 .base.cra_priority = 150,
75 .base.cra_blocksize = SHA384_BLOCK_SIZE,
76 .base.cra_module = THIS_MODULE,
77 } };
78
79 static int __init sha512_mod_init(void)
80 {
81 return crypto_register_shashes(algs, ARRAY_SIZE(algs));
82 }
83
84 static void __exit sha512_mod_fini(void)
85 {
86 crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
87 }
88
89 module_init(sha512_mod_init);
90 module_exit(sha512_mod_fini);
91
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