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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
#define TEST_NAME "aead_xchacha20poly1305"
#include "cmptest.h"
static int
tv(void)
{
#undef MLEN
#define MLEN 114U
#undef ADLEN
#define ADLEN 12U
#undef CLEN
#define CLEN (MLEN + crypto_aead_xchacha20poly1305_ietf_ABYTES)
static const unsigned char firstkey[crypto_aead_xchacha20poly1305_ietf_KEYBYTES]
= {
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f
};
#undef MESSAGE
#define MESSAGE "Ladies and Gentlemen of the class of '99: If I could offer you " \
"only one tip for the future, sunscreen would be it."
unsigned char *m = (unsigned char *) sodium_malloc(MLEN);
static const unsigned char nonce[crypto_aead_xchacha20poly1305_ietf_NPUBBYTES]
= { 0x07, 0x00, 0x00, 0x00, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4a, 0x4b };
static const unsigned char ad[ADLEN]
= { 0x50, 0x51, 0x52, 0x53, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7 };
unsigned char *c = (unsigned char *) sodium_malloc(CLEN);
unsigned char *detached_c = (unsigned char *) sodium_malloc(MLEN);
unsigned char *key2 = (unsigned char *) sodium_malloc(crypto_aead_xchacha20poly1305_ietf_KEYBYTES);
unsigned char *mac = (unsigned char *) sodium_malloc(crypto_aead_xchacha20poly1305_ietf_ABYTES);
unsigned char *m2 = (unsigned char *) sodium_malloc(MLEN);
unsigned long long found_clen;
unsigned long long found_maclen;
unsigned long long m2len;
size_t i;
assert(sizeof MESSAGE - 1U == MLEN);
memcpy(m, MESSAGE, MLEN);
crypto_aead_xchacha20poly1305_ietf_encrypt(c, &found_clen, m, MLEN,
ad, ADLEN,
NULL, nonce, firstkey);
if (found_clen != MLEN + crypto_aead_xchacha20poly1305_ietf_abytes()) {
printf("found_clen is not properly set\n");
}
for (i = 0U; i < CLEN; ++i) {
printf(",0x%02x", (unsigned int) c[i]);
if (i % 8 == 7) {
printf("\n");
}
}
printf("\n");
crypto_aead_xchacha20poly1305_ietf_encrypt_detached(detached_c,
mac, &found_maclen,
m, MLEN,
ad, ADLEN,
NULL, nonce, firstkey);
if (found_maclen != crypto_aead_xchacha20poly1305_ietf_abytes()) {
printf("found_maclen is not properly set\n");
}
if (memcmp(detached_c, c, MLEN) != 0) {
printf("detached ciphertext is bogus\n");
}
if (crypto_aead_xchacha20poly1305_ietf_decrypt(m2, &m2len, NULL, c, CLEN, ad,
ADLEN, nonce, firstkey) != 0) {
printf("crypto_aead_xchacha20poly1305_ietf_decrypt() failed\n");
}
if (m2len != MLEN) {
printf("m2len is not properly set\n");
}
if (memcmp(m, m2, MLEN) != 0) {
printf("m != m2\n");
}
memset(m2, 0, m2len);
if (crypto_aead_xchacha20poly1305_ietf_decrypt_detached(m2, NULL,
c, MLEN, mac,
ad, ADLEN,
nonce, firstkey) != 0) {
printf("crypto_aead_xchacha20poly1305_ietf_decrypt_detached() failed\n");
}
if (memcmp(m, m2, MLEN) != 0) {
printf("detached m != m2\n");
}
for (i = 0U; i < CLEN; i++) {
c[i] ^= (i + 1U);
if (crypto_aead_xchacha20poly1305_ietf_decrypt(m2, NULL, NULL, c, CLEN,
ad, ADLEN, nonce, firstkey)
== 0 || memcmp(m, m2, MLEN) == 0) {
printf("message can be forged\n");
}
c[i] ^= (i + 1U);
}
crypto_aead_xchacha20poly1305_ietf_encrypt(c, &found_clen, m, MLEN,
NULL, 0U, NULL, nonce, firstkey);
if (found_clen != CLEN) {
printf("clen is not properly set (adlen=0)\n");
}
for (i = 0U; i < CLEN; ++i) {
printf(",0x%02x", (unsigned int) c[i]);
if (i % 8 == 7) {
printf("\n");
}
}
printf("\n");
if (crypto_aead_xchacha20poly1305_ietf_decrypt(m2, &m2len, NULL, c, CLEN,
NULL, 0U, nonce, firstkey) != 0) {
printf("crypto_aead_xchacha20poly1305_ietf_decrypt() failed (adlen=0)\n");
}
if (m2len != MLEN) {
printf("m2len is not properly set (adlen=0)\n");
}
if (memcmp(m, m2, MLEN) != 0) {
printf("m != m2 (adlen=0)\n");
}
m2len = 1;
if (crypto_aead_xchacha20poly1305_ietf_decrypt(
m2, &m2len, NULL, NULL,
randombytes_uniform(crypto_aead_xchacha20poly1305_ietf_ABYTES),
NULL, 0U, nonce, firstkey) != -1) {
printf("crypto_aead_xchacha20poly1305_ietf_decrypt() worked with a short "
"ciphertext\n");
}
if (m2len != 0) {
printf("Message length should have been set to zero after a failure\n");
}
m2len = 1;
if (crypto_aead_xchacha20poly1305_ietf_decrypt(m2, &m2len, NULL, c, 0U, NULL, 0U,
nonce, firstkey) != -1) {
printf("crypto_aead_xchacha20poly1305_ietf_decrypt() worked with an empty "
"ciphertext\n");
}
if (m2len != 0) {
printf("Message length should have been set to zero after a failure\n");
}
memcpy(c, m, MLEN);
crypto_aead_xchacha20poly1305_ietf_encrypt(c, &found_clen, c, MLEN,
NULL, 0U, NULL, nonce, firstkey);
if (found_clen != CLEN) {
printf("clen is not properly set (adlen=0)\n");
}
for (i = 0U; i < CLEN; ++i) {
printf(",0x%02x", (unsigned int) c[i]);
if (i % 8 == 7) {
printf("\n");
}
}
printf("\n");
if (crypto_aead_xchacha20poly1305_ietf_decrypt(c, &m2len, NULL, c, CLEN,
NULL, 0U, nonce, firstkey) != 0) {
printf("crypto_aead_xchacha20poly1305_ietf_decrypt() failed (adlen=0)\n");
}
if (m2len != MLEN) {
printf("m2len is not properly set (adlen=0)\n");
}
if (memcmp(m, c, MLEN) != 0) {
printf("m != c (adlen=0)\n");
}
crypto_aead_xchacha20poly1305_ietf_keygen(key2);
if (crypto_aead_xchacha20poly1305_ietf_decrypt(c, &m2len, NULL, c, CLEN,
NULL, 0U, nonce, key2) == 0) {
printf("crypto_aead_xchacha20poly1305_ietf_decrypt() with a wrong key should have failed\n");
}
sodium_free(c);
sodium_free(detached_c);
sodium_free(key2);
sodium_free(mac);
sodium_free(m2);
sodium_free(m);
assert(crypto_aead_xchacha20poly1305_ietf_abytes() == crypto_aead_xchacha20poly1305_ietf_ABYTES);
assert(crypto_aead_xchacha20poly1305_ietf_keybytes() == crypto_aead_xchacha20poly1305_ietf_KEYBYTES);
assert(crypto_aead_xchacha20poly1305_ietf_npubbytes() == crypto_aead_xchacha20poly1305_ietf_NPUBBYTES);
assert(crypto_aead_xchacha20poly1305_ietf_nsecbytes() == 0U);
assert(crypto_aead_xchacha20poly1305_ietf_nsecbytes() == crypto_aead_xchacha20poly1305_ietf_NSECBYTES);
assert(crypto_aead_xchacha20poly1305_ietf_messagebytes_max() == crypto_aead_xchacha20poly1305_ietf_MESSAGEBYTES_MAX);
assert(crypto_aead_xchacha20poly1305_IETF_KEYBYTES == crypto_aead_xchacha20poly1305_ietf_KEYBYTES);
assert(crypto_aead_xchacha20poly1305_IETF_NSECBYTES == crypto_aead_xchacha20poly1305_ietf_NSECBYTES);
assert(crypto_aead_xchacha20poly1305_IETF_NPUBBYTES == crypto_aead_xchacha20poly1305_ietf_NPUBBYTES);
assert(crypto_aead_xchacha20poly1305_IETF_ABYTES == crypto_aead_xchacha20poly1305_ietf_ABYTES);
assert(crypto_aead_xchacha20poly1305_IETF_MESSAGEBYTES_MAX == crypto_aead_xchacha20poly1305_ietf_MESSAGEBYTES_MAX);
return 0;
}
int
main(void)
{
tv();
return 0;
}
|
