olm/tests/test_axolotl.cpp

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/* 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.
*/
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#include "axolotl/axolotl.hh"
#include "unittest.hh"
int main() {
std::uint8_t root_info[] = "Axolotl";
std::uint8_t ratchet_info[] = "AxolotlRatchet";
std::uint8_t message_info[] = "AxolotlMessageKeys";
axolotl::KdfInfo kdf_info = {
root_info, sizeof(root_info) - 1,
ratchet_info, sizeof(ratchet_info - 1),
message_info, sizeof(ratchet_info - 1)
};
std::uint8_t random_bytes[] = "0123456789ABDEF0123456789ABCDEF";
axolotl::Curve25519KeyPair bob_key;
axolotl::generate_key(random_bytes, bob_key);
std::uint8_t shared_secret[] = "A secret";
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{ /* Send/Receive test case */
TestCase test_case("Axolotl Send/Receive");
axolotl::Session alice(kdf_info);
axolotl::Session bob(kdf_info);
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alice.initialise_as_bob(shared_secret, sizeof(shared_secret) - 1, bob_key);
bob.initialise_as_alice(shared_secret, sizeof(shared_secret) - 1, bob_key);
std::uint8_t plaintext[] = "Message";
std::size_t plaintext_length = sizeof(plaintext) - 1;
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std::size_t message_length, random_length, output_length;
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std::size_t encrypt_length, decrypt_length;
{
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/* Bob sends Alice a message */
message_length = bob.encrypt_max_output_length(plaintext_length);
random_length = bob.encrypt_random_length();
assert_equals(std::size_t(0), random_length);
output_length = alice.decrypt_max_plaintext_length(message_length);
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std::uint8_t message[message_length];
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std::uint8_t output[output_length];
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encrypt_length = bob.encrypt(
plaintext, plaintext_length,
NULL, 0,
message, message_length
);
assert_equals(message_length, encrypt_length);
decrypt_length = alice.decrypt(
message, message_length,
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output, output_length
);
assert_equals(plaintext_length, decrypt_length);
assert_equals(plaintext, output, decrypt_length);
}
{
/* Alice sends Bob a message */
message_length = alice.encrypt_max_output_length(plaintext_length);
random_length = alice.encrypt_random_length();
assert_equals(std::size_t(32), random_length);
output_length = bob.decrypt_max_plaintext_length(message_length);
std::uint8_t message[message_length];
std::uint8_t output[output_length];
std::uint8_t random[] = "This is a random 32 byte string.";
encrypt_length = alice.encrypt(
plaintext, plaintext_length,
random, 32,
message, message_length
);
assert_equals(message_length, encrypt_length);
decrypt_length = bob.decrypt(
message, message_length,
output, output_length
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);
assert_equals(plaintext_length, decrypt_length);
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assert_equals(plaintext, output, decrypt_length);
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}
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} /* Send/receive message test case */
{ /* Out of order test case */
TestCase test_case("Axolotl Out of Order");
axolotl::Session alice(kdf_info);
axolotl::Session bob(kdf_info);
alice.initialise_as_bob(shared_secret, sizeof(shared_secret) - 1, bob_key);
bob.initialise_as_alice(shared_secret, sizeof(shared_secret) - 1, bob_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_max_output_length(plaintext_1_length);
random_length = alice.encrypt_random_length();
assert_equals(std::size_t(32), 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_max_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_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_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 */
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}