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(u64 *state, u8 const *src,
24 int blocks);
25
sha512_neon_update(struct shash_desc * desc,const u8 * data,unsigned int len)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,
37 (sha512_block_fn *)sha512_block_data_order_neon);
38 kernel_neon_end();
39
40 return 0;
41 }
42
sha512_neon_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out)43 static int sha512_neon_finup(struct shash_desc *desc, const u8 *data,
44 unsigned int len, u8 *out)
45 {
46 if (!crypto_simd_usable())
47 return sha512_arm_finup(desc, data, len, out);
48
49 kernel_neon_begin();
50 if (len)
51 sha512_base_do_update(desc, data, len,
52 (sha512_block_fn *)sha512_block_data_order_neon);
53 sha512_base_do_finalize(desc,
54 (sha512_block_fn *)sha512_block_data_order_neon);
55 kernel_neon_end();
56
57 return sha512_base_finish(desc, out);
58 }
59
sha512_neon_final(struct shash_desc * desc,u8 * out)60 static int sha512_neon_final(struct shash_desc *desc, u8 *out)
61 {
62 return sha512_neon_finup(desc, NULL, 0, out);
63 }
64
65 struct shash_alg sha512_neon_algs[] = { {
66 .init = sha384_base_init,
67 .update = sha512_neon_update,
68 .final = sha512_neon_final,
69 .finup = sha512_neon_finup,
70 .descsize = sizeof(struct sha512_state),
71 .digestsize = SHA384_DIGEST_SIZE,
72 .base = {
73 .cra_name = "sha384",
74 .cra_driver_name = "sha384-neon",
75 .cra_priority = 300,
76 .cra_blocksize = SHA384_BLOCK_SIZE,
77 .cra_module = THIS_MODULE,
78
79 }
80 }, {
81 .init = sha512_base_init,
82 .update = sha512_neon_update,
83 .final = sha512_neon_final,
84 .finup = sha512_neon_finup,
85 .descsize = sizeof(struct sha512_state),
86 .digestsize = SHA512_DIGEST_SIZE,
87 .base = {
88 .cra_name = "sha512",
89 .cra_driver_name = "sha512-neon",
90 .cra_priority = 300,
91 .cra_blocksize = SHA512_BLOCK_SIZE,
92 .cra_module = THIS_MODULE,
93 }
94 } };
95