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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/* Copyright 2015 OpenMarket Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "olm/ratchet.hh"
#include "olm/cipher.hh"
#include "unittest.hh"
int main() {
std::uint8_t root_info[] = "Olm";
std::uint8_t ratchet_info[] = "OlmRatchet";
std::uint8_t message_info[] = "OlmMessageKeys";
olm::KdfInfo kdf_info = {
root_info, sizeof(root_info) - 1,
ratchet_info, sizeof(ratchet_info) - 1
};
olm::CipherAesSha256 cipher(
message_info, sizeof(message_info) - 1
);
std::uint8_t random_bytes[] = "0123456789ABDEF0123456789ABCDEF";
olm::Curve25519KeyPair alice_key;
olm::curve25519_generate_key(random_bytes, alice_key);
std::uint8_t shared_secret[] = "A secret";
{ /* Send/Receive test case */
TestCase test_case("Olm Send/Receive");
olm::Ratchet alice(kdf_info, cipher);
olm::Ratchet bob(kdf_info, cipher);
alice.initialise_as_alice(shared_secret, sizeof(shared_secret) - 1, alice_key);
bob.initialise_as_bob(shared_secret, sizeof(shared_secret) - 1, alice_key);
std::uint8_t plaintext[] = "Message";
std::size_t plaintext_length = sizeof(plaintext) - 1;
std::size_t message_length, random_length, output_length;
std::size_t encrypt_length, decrypt_length;
{
/* Alice sends Bob a message */
message_length = alice.encrypt_output_length(plaintext_length);
random_length = alice.encrypt_random_length();
assert_equals(std::size_t(0), random_length);
std::uint8_t message[message_length];
encrypt_length = alice.encrypt(
plaintext, plaintext_length,
NULL, 0,
message, message_length
);
assert_equals(message_length, encrypt_length);
output_length = bob.decrypt_max_plaintext_length(message, message_length);
std::uint8_t output[output_length];
decrypt_length = bob.decrypt(
message, message_length,
output, output_length
);
assert_equals(plaintext_length, decrypt_length);
assert_equals(plaintext, output, decrypt_length);
}
{
/* Bob sends Alice a message */
message_length = bob.encrypt_output_length(plaintext_length);
random_length = bob.encrypt_random_length();
assert_equals(std::size_t(32), random_length);
std::uint8_t message[message_length];
std::uint8_t random[] = "This is a random 32 byte string.";
encrypt_length = bob.encrypt(
plaintext, plaintext_length,
random, 32,
message, message_length
);
assert_equals(message_length, encrypt_length);
output_length = alice.decrypt_max_plaintext_length(message, message_length);
std::uint8_t output[output_length];
decrypt_length = alice.decrypt(
message, message_length,
output, output_length
);
assert_equals(plaintext_length, decrypt_length);
assert_equals(plaintext, output, decrypt_length);
}
} /* Send/receive message test case */
{ /* Out of order test case */
TestCase test_case("Olm Out of Order");
olm::Ratchet alice(kdf_info, cipher);
olm::Ratchet bob(kdf_info, cipher);
alice.initialise_as_alice(shared_secret, sizeof(shared_secret) - 1, alice_key);
bob.initialise_as_bob(shared_secret, sizeof(shared_secret) - 1, alice_key);
std::uint8_t plaintext_1[] = "First Message";
std::size_t plaintext_1_length = sizeof(plaintext_1) - 1;
std::uint8_t plaintext_2[] = "Second Messsage. A bit longer than the first.";
std::size_t plaintext_2_length = sizeof(plaintext_2) - 1;
std::size_t message_1_length, message_2_length, random_length, output_length;
std::size_t encrypt_length, decrypt_length;
{
/* Alice sends Bob two messages and they arrive out of order */
message_1_length = alice.encrypt_output_length(plaintext_1_length);
random_length = alice.encrypt_random_length();
assert_equals(std::size_t(0), random_length);
std::uint8_t message_1[message_1_length];
std::uint8_t random[] = "This is a random 32 byte string.";
encrypt_length = alice.encrypt(
plaintext_1, plaintext_1_length,
random, 32,
message_1, message_1_length
);
assert_equals(message_1_length, encrypt_length);
message_2_length = alice.encrypt_output_length(plaintext_2_length);
random_length = alice.encrypt_random_length();
assert_equals(std::size_t(0), random_length);
std::uint8_t message_2[message_2_length];
encrypt_length = alice.encrypt(
plaintext_2, plaintext_2_length,
NULL, 0,
message_2, message_2_length
);
assert_equals(message_2_length, encrypt_length);
output_length = bob.decrypt_max_plaintext_length(
message_2, message_2_length
);
std::uint8_t output_1[output_length];
decrypt_length = bob.decrypt(
message_2, message_2_length,
output_1, output_length
);
assert_equals(plaintext_2_length, decrypt_length);
assert_equals(plaintext_2, output_1, decrypt_length);
output_length = bob.decrypt_max_plaintext_length(
message_1, message_1_length
);
std::uint8_t output_2[output_length];
decrypt_length = bob.decrypt(
message_1, message_1_length,
output_2, output_length
);
assert_equals(plaintext_1_length, decrypt_length);
assert_equals(plaintext_1, output_2, decrypt_length);
}
} /* Out of order test case */
{ /* More messages */
TestCase test_case("Olm More Messages");
olm::Ratchet alice(kdf_info, cipher);
olm::Ratchet bob(kdf_info, cipher);
alice.initialise_as_alice(shared_secret, sizeof(shared_secret) - 1, alice_key);
bob.initialise_as_bob(shared_secret, sizeof(shared_secret) - 1, alice_key);
std::uint8_t plaintext[] = "These 15 bytes";
assert_equals(std::size_t(15), sizeof(plaintext));
std::uint8_t random[] = "This is a random 32 byte string";
for (unsigned i = 0; i < 8; ++i) {
{
std::uint8_t msg[alice.encrypt_output_length(sizeof(plaintext))];
std::uint8_t encrypt_length = alice.encrypt(
plaintext, 15, random, 32, msg, sizeof(msg)
);
std::uint8_t output[bob.decrypt_max_plaintext_length(msg, sizeof(msg))];
assert_equals(
std::size_t(15), bob.decrypt(msg, sizeof(msg), output, sizeof(output))
);
}
random[31]++;
{
std::uint8_t msg[bob.encrypt_output_length(sizeof(plaintext))];
std::uint8_t encrypt_length = bob.encrypt(
plaintext, 15, random, 32, msg, sizeof(msg)
);
std::uint8_t output[alice.decrypt_max_plaintext_length(msg, sizeof(msg))];
assert_equals(
std::size_t(15), alice.decrypt(msg, sizeof(msg), output, sizeof(output))
);
}
random[31]++;
}
}
}
|
