1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Cryptographic API.
*
* SHA-512 and SHA-384 Secure Hash Algorithm.
*
* Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
*
* Based on crypto/sha512_generic.c, which is:
*
* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
* Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
*/
#include <asm/octeon/octeon.h>
#include <crypto/internal/hash.h>
#include <crypto/sha2.h>
#include <crypto/sha512_base.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include "octeon-crypto.h"
/*
* We pass everything as 64-bit. OCTEON can handle misaligned data.
*/
static void octeon_sha512_store_hash(struct sha512_state *sctx)
{
write_octeon_64bit_hash_sha512(sctx->state[0], 0);
write_octeon_64bit_hash_sha512(sctx->state[1], 1);
write_octeon_64bit_hash_sha512(sctx->state[2], 2);
write_octeon_64bit_hash_sha512(sctx->state[3], 3);
write_octeon_64bit_hash_sha512(sctx->state[4], 4);
write_octeon_64bit_hash_sha512(sctx->state[5], 5);
write_octeon_64bit_hash_sha512(sctx->state[6], 6);
write_octeon_64bit_hash_sha512(sctx->state[7], 7);
}
static void octeon_sha512_read_hash(struct sha512_state *sctx)
{
sctx->state[0] = read_octeon_64bit_hash_sha512(0);
sctx->state[1] = read_octeon_64bit_hash_sha512(1);
sctx->state[2] = read_octeon_64bit_hash_sha512(2);
sctx->state[3] = read_octeon_64bit_hash_sha512(3);
sctx->state[4] = read_octeon_64bit_hash_sha512(4);
sctx->state[5] = read_octeon_64bit_hash_sha512(5);
sctx->state[6] = read_octeon_64bit_hash_sha512(6);
sctx->state[7] = read_octeon_64bit_hash_sha512(7);
}
static void octeon_sha512_transform(struct sha512_state *sctx,
const u8 *src, int blocks)
{
do {
const u64 *block = (const u64 *)src;
write_octeon_64bit_block_sha512(block[0], 0);
write_octeon_64bit_block_sha512(block[1], 1);
write_octeon_64bit_block_sha512(block[2], 2);
write_octeon_64bit_block_sha512(block[3], 3);
write_octeon_64bit_block_sha512(block[4], 4);
write_octeon_64bit_block_sha512(block[5], 5);
write_octeon_64bit_block_sha512(block[6], 6);
write_octeon_64bit_block_sha512(block[7], 7);
write_octeon_64bit_block_sha512(block[8], 8);
write_octeon_64bit_block_sha512(block[9], 9);
write_octeon_64bit_block_sha512(block[10], 10);
write_octeon_64bit_block_sha512(block[11], 11);
write_octeon_64bit_block_sha512(block[12], 12);
write_octeon_64bit_block_sha512(block[13], 13);
write_octeon_64bit_block_sha512(block[14], 14);
octeon_sha512_start(block[15]);
src += SHA512_BLOCK_SIZE;
} while (--blocks);
}
static int octeon_sha512_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
struct sha512_state *sctx = shash_desc_ctx(desc);
struct octeon_cop2_state state;
unsigned long flags;
int remain;
flags = octeon_crypto_enable(&state);
octeon_sha512_store_hash(sctx);
remain = sha512_base_do_update_blocks(desc, data, len,
octeon_sha512_transform);
octeon_sha512_read_hash(sctx);
octeon_crypto_disable(&state, flags);
return remain;
}
static int octeon_sha512_finup(struct shash_desc *desc, const u8 *src,
unsigned int len, u8 *hash)
{
struct sha512_state *sctx = shash_desc_ctx(desc);
struct octeon_cop2_state state;
unsigned long flags;
flags = octeon_crypto_enable(&state);
octeon_sha512_store_hash(sctx);
sha512_base_do_finup(desc, src, len, octeon_sha512_transform);
octeon_sha512_read_hash(sctx);
octeon_crypto_disable(&state, flags);
return sha512_base_finish(desc, hash);
}
static struct shash_alg octeon_sha512_algs[2] = { {
.digestsize = SHA512_DIGEST_SIZE,
.init = sha512_base_init,
.update = octeon_sha512_update,
.finup = octeon_sha512_finup,
.descsize = SHA512_STATE_SIZE,
.base = {
.cra_name = "sha512",
.cra_driver_name= "octeon-sha512",
.cra_priority = OCTEON_CR_OPCODE_PRIORITY,
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY |
CRYPTO_AHASH_ALG_FINUP_MAX,
.cra_blocksize = SHA512_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
}, {
.digestsize = SHA384_DIGEST_SIZE,
.init = sha384_base_init,
.update = octeon_sha512_update,
.finup = octeon_sha512_finup,
.descsize = SHA512_STATE_SIZE,
.base = {
.cra_name = "sha384",
.cra_driver_name= "octeon-sha384",
.cra_priority = OCTEON_CR_OPCODE_PRIORITY,
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY |
CRYPTO_AHASH_ALG_FINUP_MAX,
.cra_blocksize = SHA384_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
} };
static int __init octeon_sha512_mod_init(void)
{
if (!octeon_has_crypto())
return -ENOTSUPP;
return crypto_register_shashes(octeon_sha512_algs,
ARRAY_SIZE(octeon_sha512_algs));
}
static void __exit octeon_sha512_mod_fini(void)
{
crypto_unregister_shashes(octeon_sha512_algs,
ARRAY_SIZE(octeon_sha512_algs));
}
module_init(octeon_sha512_mod_init);
module_exit(octeon_sha512_mod_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms (OCTEON)");
MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");
|
