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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.
*/
#include "olm/ratchet.hh"
#include "olm/cipher.h"
#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_cipher_aes_sha_256 cipher0;
olm_cipher *cipher = olm_cipher_aes_sha_256_init(
&cipher0, 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))];
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))];
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]++;
}
}
}
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