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
|
#include <string.h>
#include "crypto_box_curve25519xsalsa20poly1305.h"
#include "crypto_core_hsalsa20.h"
#include "crypto_hash_sha512.h"
#include "crypto_scalarmult_curve25519.h"
#include "crypto_secretbox_xsalsa20poly1305.h"
#include "randombytes.h"
#include "utils.h"
int
crypto_box_curve25519xsalsa20poly1305_seed_keypair(unsigned char *pk,
unsigned char *sk,
const unsigned char *seed)
{
unsigned char hash[64];
crypto_hash_sha512(hash, seed, 32);
memcpy(sk, hash, 32);
sodium_memzero(hash, sizeof hash);
return crypto_scalarmult_curve25519_base(pk, sk);
}
int
crypto_box_curve25519xsalsa20poly1305_keypair(unsigned char *pk,
unsigned char *sk)
{
randombytes_buf(sk, 32);
return crypto_scalarmult_curve25519_base(pk, sk);
}
int
crypto_box_curve25519xsalsa20poly1305_beforenm(unsigned char *k,
const unsigned char *pk,
const unsigned char *sk)
{
static const unsigned char zero[16] = { 0 };
unsigned char s[32];
if (crypto_scalarmult_curve25519(s, sk, pk) != 0) {
return -1;
}
return crypto_core_hsalsa20(k, zero, s, NULL);
}
int
crypto_box_curve25519xsalsa20poly1305_afternm(unsigned char *c,
const unsigned char *m,
unsigned long long mlen,
const unsigned char *n,
const unsigned char *k)
{
return crypto_secretbox_xsalsa20poly1305(c, m, mlen, n, k);
}
int
crypto_box_curve25519xsalsa20poly1305_open_afternm(unsigned char *m,
const unsigned char *c,
unsigned long long clen,
const unsigned char *n,
const unsigned char *k)
{
return crypto_secretbox_xsalsa20poly1305_open(m, c, clen, n, k);
}
int
crypto_box_curve25519xsalsa20poly1305(unsigned char *c, const unsigned char *m,
unsigned long long mlen,
const unsigned char *n,
const unsigned char *pk,
const unsigned char *sk)
{
unsigned char k[crypto_box_curve25519xsalsa20poly1305_BEFORENMBYTES];
int ret;
if (crypto_box_curve25519xsalsa20poly1305_beforenm(k, pk, sk) != 0) {
return -1;
}
ret = crypto_box_curve25519xsalsa20poly1305_afternm(c, m, mlen, n, k);
sodium_memzero(k, sizeof k);
return ret;
}
int
crypto_box_curve25519xsalsa20poly1305_open(
unsigned char *m, const unsigned char *c, unsigned long long clen,
const unsigned char *n, const unsigned char *pk, const unsigned char *sk)
{
unsigned char k[crypto_box_curve25519xsalsa20poly1305_BEFORENMBYTES];
int ret;
if (crypto_box_curve25519xsalsa20poly1305_beforenm(k, pk, sk) != 0) {
return -1;
}
ret = crypto_box_curve25519xsalsa20poly1305_open_afternm(m, c, clen, n, k);
sodium_memzero(k, sizeof k);
return ret;
}
size_t
crypto_box_curve25519xsalsa20poly1305_seedbytes(void)
{
return crypto_box_curve25519xsalsa20poly1305_SEEDBYTES;
}
size_t
crypto_box_curve25519xsalsa20poly1305_publickeybytes(void)
{
return crypto_box_curve25519xsalsa20poly1305_PUBLICKEYBYTES;
}
size_t
crypto_box_curve25519xsalsa20poly1305_secretkeybytes(void)
{
return crypto_box_curve25519xsalsa20poly1305_SECRETKEYBYTES;
}
size_t
crypto_box_curve25519xsalsa20poly1305_beforenmbytes(void)
{
return crypto_box_curve25519xsalsa20poly1305_BEFORENMBYTES;
}
size_t
crypto_box_curve25519xsalsa20poly1305_noncebytes(void)
{
return crypto_box_curve25519xsalsa20poly1305_NONCEBYTES;
}
size_t
crypto_box_curve25519xsalsa20poly1305_zerobytes(void)
{
return crypto_box_curve25519xsalsa20poly1305_ZEROBYTES;
}
size_t
crypto_box_curve25519xsalsa20poly1305_boxzerobytes(void)
{
return crypto_box_curve25519xsalsa20poly1305_BOXZEROBYTES;
}
size_t
crypto_box_curve25519xsalsa20poly1305_macbytes(void)
{
return crypto_box_curve25519xsalsa20poly1305_MACBYTES;
}
size_t
crypto_box_curve25519xsalsa20poly1305_messagebytes_max(void)
{
return crypto_box_curve25519xsalsa20poly1305_MESSAGEBYTES_MAX;
}
|
