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
|
/* Copyright (C) 2015-2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */
#ifndef CHACHA20POLY1305_H
#define CHACHA20POLY1305_H
#include <linux/types.h>
struct scatterlist;
enum chacha20poly1305_lengths {
CHACHA20POLY1305_KEYLEN = 32,
CHACHA20POLY1305_AUTHTAGLEN = 16
};
void chacha20poly1305_init(void);
bool chacha20poly1305_encrypt(uint8_t *dst, const uint8_t *src, const size_t src_len,
const uint8_t *ad, const size_t ad_len,
const uint64_t nonce, const uint8_t key[CHACHA20POLY1305_KEYLEN]);
bool chacha20poly1305_encrypt_sg(struct scatterlist *dst, struct scatterlist *src, const size_t src_len,
const uint8_t *ad, const size_t ad_len,
const uint64_t nonce, const uint8_t key[CHACHA20POLY1305_KEYLEN],
bool have_simd);
bool chacha20poly1305_decrypt(uint8_t *dst, const uint8_t *src, const size_t src_len,
const uint8_t *ad, const size_t ad_len,
const uint64_t nonce, const uint8_t key[CHACHA20POLY1305_KEYLEN]);
bool chacha20poly1305_decrypt_sg(struct scatterlist *dst, struct scatterlist *src, const size_t src_len,
const uint8_t *ad, const size_t ad_len,
const uint64_t nonce, const uint8_t key[CHACHA20POLY1305_KEYLEN]);
#ifdef CONFIG_X86_64
#include <linux/version.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0)
#include <asm/fpu/api.h>
#include <asm/simd.h>
#else
#include <asm/i387.h>
#endif
#endif
static inline bool chacha20poly1305_init_simd(void)
{
bool have_simd = false;
#ifdef CONFIG_X86_64
have_simd = irq_fpu_usable();
if (have_simd)
kernel_fpu_begin();
#endif
return have_simd;
}
static inline void chacha20poly1305_deinit_simd(bool was_on)
{
#ifdef CONFIG_X86_64
if (was_on)
kernel_fpu_end();
#endif
}
#ifdef DEBUG
bool chacha20poly1305_selftest(void);
#endif
#endif
|
