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
|
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
* Helper functions for BLAKE2b implementations.
* Keep this in sync with the corresponding BLAKE2s header.
*/
#ifndef _CRYPTO_INTERNAL_BLAKE2B_H
#define _CRYPTO_INTERNAL_BLAKE2B_H
#include <asm/byteorder.h>
#include <crypto/blake2b.h>
#include <crypto/internal/hash.h>
#include <linux/array_size.h>
#include <linux/compiler.h>
#include <linux/build_bug.h>
#include <linux/errno.h>
#include <linux/math.h>
#include <linux/string.h>
#include <linux/types.h>
static inline void blake2b_set_lastblock(struct blake2b_state *state)
{
state->f[0] = -1;
state->f[1] = 0;
}
static inline void blake2b_set_nonlast(struct blake2b_state *state)
{
state->f[0] = 0;
state->f[1] = 0;
}
typedef void (*blake2b_compress_t)(struct blake2b_state *state,
const u8 *block, size_t nblocks, u32 inc);
/* Helper functions for shash implementations of BLAKE2b */
struct blake2b_tfm_ctx {
u8 key[BLAKE2B_BLOCK_SIZE];
unsigned int keylen;
};
static inline int crypto_blake2b_setkey(struct crypto_shash *tfm,
const u8 *key, unsigned int keylen)
{
struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(tfm);
if (keylen > BLAKE2B_KEY_SIZE)
return -EINVAL;
BUILD_BUG_ON(BLAKE2B_KEY_SIZE > BLAKE2B_BLOCK_SIZE);
memcpy(tctx->key, key, keylen);
memset(tctx->key + keylen, 0, BLAKE2B_BLOCK_SIZE - keylen);
tctx->keylen = keylen;
return 0;
}
static inline int crypto_blake2b_init(struct shash_desc *desc)
{
const struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
struct blake2b_state *state = shash_desc_ctx(desc);
unsigned int outlen = crypto_shash_digestsize(desc->tfm);
__blake2b_init(state, outlen, tctx->keylen);
return tctx->keylen ?
crypto_shash_update(desc, tctx->key, BLAKE2B_BLOCK_SIZE) : 0;
}
static inline int crypto_blake2b_update_bo(struct shash_desc *desc,
const u8 *in, unsigned int inlen,
blake2b_compress_t compress)
{
struct blake2b_state *state = shash_desc_ctx(desc);
blake2b_set_nonlast(state);
compress(state, in, inlen / BLAKE2B_BLOCK_SIZE, BLAKE2B_BLOCK_SIZE);
return inlen - round_down(inlen, BLAKE2B_BLOCK_SIZE);
}
static inline int crypto_blake2b_finup(struct shash_desc *desc, const u8 *in,
unsigned int inlen, u8 *out,
blake2b_compress_t compress)
{
struct blake2b_state *state = shash_desc_ctx(desc);
u8 buf[BLAKE2B_BLOCK_SIZE];
int i;
memcpy(buf, in, inlen);
memset(buf + inlen, 0, BLAKE2B_BLOCK_SIZE - inlen);
blake2b_set_lastblock(state);
compress(state, buf, 1, inlen);
for (i = 0; i < ARRAY_SIZE(state->h); i++)
__cpu_to_le64s(&state->h[i]);
memcpy(out, state->h, crypto_shash_digestsize(desc->tfm));
memzero_explicit(buf, sizeof(buf));
return 0;
}
#endif /* _CRYPTO_INTERNAL_BLAKE2B_H */
|
