1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * sha512-neon-glue.c - accelerated SHA-384/512 for ARM NEON
4 *
5 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
6 */
7
8 #include <crypto/internal/hash.h>
9 #include <crypto/internal/simd.h>
10 #include <crypto/sha2.h>
11 #include <crypto/sha512_base.h>
12 #include <linux/crypto.h>
13 #include <linux/module.h>
14
15 #include <asm/simd.h>
16 #include <asm/neon.h>
17
18 #include "sha512.h"
19
20 MODULE_ALIAS_CRYPTO("sha384-neon");
21 MODULE_ALIAS_CRYPTO("sha512-neon");
22
23 asmlinkage void sha512_block_data_order_neon(struct sha512_state *state,
24 const u8 *src, int blocks);
25
26 static int sha512_neon_update(struct shash_desc *desc, const u8 *data,
27 unsigned int len)
28 {
29 struct sha512_state *sctx = shash_desc_ctx(desc);
30
31 if (!crypto_simd_usable() ||
32 (sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE)
33 return sha512_arm_update(desc, data, len);
34
35 kernel_neon_begin();
36 sha512_base_do_update(desc, data, len, sha512_block_data_order_neon);
37 kernel_neon_end();
38
39 return 0;
40 }
41
42 static int sha512_neon_finup(struct shash_desc *desc, const u8 *data,
43 unsigned int len, u8 *out)
44 {
45 if (!crypto_simd_usable())
46 return sha512_arm_finup(desc, data, len, out);
47
48 kernel_neon_begin();
49 if (len)
50 sha512_base_do_update(desc, data, len,
51 sha512_block_data_order_neon);
52 sha512_base_do_finalize(desc, sha512_block_data_order_neon);
53 kernel_neon_end();
54
55 return sha512_base_finish(desc, out);
56 }
57
58 static int sha512_neon_final(struct shash_desc *desc, u8 *out)
59 {
60 return sha512_neon_finup(desc, NULL, 0, out);
61 }
62
63 struct shash_alg sha512_neon_algs[] = { {
64 .init = sha384_base_init,
65 .update = sha512_neon_update,
66 .final = sha512_neon_final,
67 .finup = sha512_neon_finup,
68 .descsize = sizeof(struct sha512_state),
69 .digestsize = SHA384_DIGEST_SIZE,
70 .base = {
71 .cra_name = "sha384",
72 .cra_driver_name = "sha384-neon",
73 .cra_priority = 300,
74 .cra_blocksize = SHA384_BLOCK_SIZE,
75 .cra_module = THIS_MODULE,
76
77 }
78 }, {
79 .init = sha512_base_init,
80 .update = sha512_neon_update,
81 .final = sha512_neon_final,
82 .finup = sha512_neon_finup,
83 .descsize = sizeof(struct sha512_state),
84 .digestsize = SHA512_DIGEST_SIZE,
85 .base = {
86 .cra_name = "sha512",
87 .cra_driver_name = "sha512-neon",
88 .cra_priority = 300,
89 .cra_blocksize = SHA512_BLOCK_SIZE,
90 .cra_module = THIS_MODULE,
91 }
92 } };
93
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