221 lines
6.8 KiB
C++
221 lines
6.8 KiB
C++
/* Copyright 2015 OpenMarket Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "olm/ratchet.hh"
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#include "olm/cipher.h"
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#include "unittest.hh"
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int main() {
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std::uint8_t root_info[] = "Olm";
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std::uint8_t ratchet_info[] = "OlmRatchet";
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std::uint8_t message_info[] = "OlmMessageKeys";
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olm::KdfInfo kdf_info = {
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root_info, sizeof(root_info) - 1,
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ratchet_info, sizeof(ratchet_info) - 1
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};
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_olm_cipher_aes_sha_256 cipher0 = OLM_CIPHER_INIT_AES_SHA_256(message_info);
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_olm_cipher *cipher = OLM_CIPHER_BASE(&cipher0);
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std::uint8_t random_bytes[] = "0123456789ABDEF0123456789ABCDEF";
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_olm_curve25519_key_pair alice_key;
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_olm_crypto_curve25519_generate_key(random_bytes, &alice_key);
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std::uint8_t shared_secret[] = "A secret";
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{ /* Send/Receive test case */
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TestCase test_case("Olm Send/Receive");
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olm::Ratchet alice(kdf_info, cipher);
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olm::Ratchet bob(kdf_info, cipher);
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alice.initialise_as_alice(shared_secret, sizeof(shared_secret) - 1, alice_key);
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bob.initialise_as_bob(shared_secret, sizeof(shared_secret) - 1, alice_key.public_key);
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std::uint8_t plaintext[] = "Message";
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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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{
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/* Alice sends Bob a message */
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message_length = alice.encrypt_output_length(plaintext_length);
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random_length = alice.encrypt_random_length();
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assert_equals(std::size_t(0), random_length);
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std::uint8_t message[message_length];
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encrypt_length = alice.encrypt(
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plaintext, plaintext_length,
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NULL, 0,
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message, message_length
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);
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assert_equals(message_length, encrypt_length);
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output_length = bob.decrypt_max_plaintext_length(message, message_length);
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std::uint8_t output[output_length];
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decrypt_length = bob.decrypt(
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message, message_length,
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output, output_length
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);
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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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{
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/* Bob sends Alice a message */
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message_length = bob.encrypt_output_length(plaintext_length);
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random_length = bob.encrypt_random_length();
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assert_equals(std::size_t(32), random_length);
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std::uint8_t message[message_length];
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std::uint8_t random[] = "This is a random 32 byte string.";
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encrypt_length = bob.encrypt(
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plaintext, plaintext_length,
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random, 32,
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message, message_length
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);
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assert_equals(message_length, encrypt_length);
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output_length = alice.decrypt_max_plaintext_length(message, message_length);
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std::uint8_t output[output_length];
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decrypt_length = alice.decrypt(
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message, message_length,
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output, output_length
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);
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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 */
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{ /* Out of order test case */
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TestCase test_case("Olm Out of Order");
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olm::Ratchet alice(kdf_info, cipher);
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olm::Ratchet bob(kdf_info, cipher);
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alice.initialise_as_alice(shared_secret, sizeof(shared_secret) - 1, alice_key);
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bob.initialise_as_bob(shared_secret, sizeof(shared_secret) - 1, alice_key.public_key);
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std::uint8_t plaintext_1[] = "First Message";
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std::size_t plaintext_1_length = sizeof(plaintext_1) - 1;
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std::uint8_t plaintext_2[] = "Second Messsage. A bit longer than the first.";
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std::size_t plaintext_2_length = sizeof(plaintext_2) - 1;
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std::size_t message_1_length, message_2_length, random_length, output_length;
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std::size_t encrypt_length, decrypt_length;
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{
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/* Alice sends Bob two messages and they arrive out of order */
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message_1_length = alice.encrypt_output_length(plaintext_1_length);
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random_length = alice.encrypt_random_length();
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assert_equals(std::size_t(0), random_length);
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std::uint8_t message_1[message_1_length];
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std::uint8_t random[] = "This is a random 32 byte string.";
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encrypt_length = alice.encrypt(
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plaintext_1, plaintext_1_length,
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random, 32,
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message_1, message_1_length
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);
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assert_equals(message_1_length, encrypt_length);
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message_2_length = alice.encrypt_output_length(plaintext_2_length);
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random_length = alice.encrypt_random_length();
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assert_equals(std::size_t(0), random_length);
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std::uint8_t message_2[message_2_length];
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encrypt_length = alice.encrypt(
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plaintext_2, plaintext_2_length,
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NULL, 0,
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message_2, message_2_length
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);
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assert_equals(message_2_length, encrypt_length);
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output_length = bob.decrypt_max_plaintext_length(
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message_2, message_2_length
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);
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std::uint8_t output_1[output_length];
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decrypt_length = bob.decrypt(
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message_2, message_2_length,
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output_1, output_length
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);
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assert_equals(plaintext_2_length, decrypt_length);
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assert_equals(plaintext_2, output_1, decrypt_length);
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output_length = bob.decrypt_max_plaintext_length(
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message_1, message_1_length
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);
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std::uint8_t output_2[output_length];
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decrypt_length = bob.decrypt(
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message_1, message_1_length,
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output_2, output_length
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);
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assert_equals(plaintext_1_length, decrypt_length);
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assert_equals(plaintext_1, output_2, decrypt_length);
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}
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} /* Out of order test case */
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{ /* More messages */
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TestCase test_case("Olm More Messages");
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olm::Ratchet alice(kdf_info, cipher);
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olm::Ratchet bob(kdf_info, cipher);
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alice.initialise_as_alice(shared_secret, sizeof(shared_secret) - 1, alice_key);
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bob.initialise_as_bob(shared_secret, sizeof(shared_secret) - 1, alice_key.public_key);
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std::uint8_t plaintext[] = "These 15 bytes";
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assert_equals(std::size_t(15), sizeof(plaintext));
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std::uint8_t random[] = "This is a random 32 byte string";
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for (unsigned i = 0; i < 8; ++i) {
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{
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std::uint8_t msg[alice.encrypt_output_length(sizeof(plaintext))];
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alice.encrypt(
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plaintext, 15, random, 32, msg, sizeof(msg)
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);
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std::uint8_t output[bob.decrypt_max_plaintext_length(msg, sizeof(msg))];
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assert_equals(
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std::size_t(15), bob.decrypt(msg, sizeof(msg), output, sizeof(output))
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);
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}
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random[31]++;
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{
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std::uint8_t msg[bob.encrypt_output_length(sizeof(plaintext))];
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bob.encrypt(
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plaintext, 15, random, 32, msg, sizeof(msg)
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);
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std::uint8_t output[alice.decrypt_max_plaintext_length(msg, sizeof(msg))];
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assert_equals(
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std::size_t(15), alice.decrypt(msg, sizeof(msg), output, sizeof(output))
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);
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}
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random[31]++;
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}
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}
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}
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