Add a message encoder/decoder

1 files changed, 53 insertions, 0 deletions

diff --git a/tests/test_message.cpp b/tests/test_message.cpp
new file mode 100644
index 0000000..a09d7e7
--- /dev/null
+++ b/tests/test_message.cpp
@@ -0,0 +1,53 @@
+#include "axolotl/message.hh"
+#include "unittest.hh"
+
+int main() {
+
+std::uint8_t message1[36] = "\x03\n\nratchetkey\x10\x01\"\nciphertexthmacsha2";
+std::uint8_t message2[36] = "\x03\x10\x01\n\nratchetkey\"\nciphertexthmacsha2";
+std::uint8_t ratchetkey[11] = "ratchetkey";
+std::uint8_t ciphertext[11] = "ciphertext";
+std::uint8_t hmacsha2[9] = "hmacsha2";
+
+{ /* Message decode test */
+
+TestCase test_case("Message decode test");
+
+axolotl::MessageReader reader(axolotl::decode_message(message1, 35, 8));
+
+assert_equals(std::size_t(27), reader.body_length);
+assert_equals(std::uint8_t(3), reader.version);
+assert_equals(std::uint32_t(1), reader.counter);
+assert_equals(std::size_t(10), reader.ratchet_key_length);
+assert_equals(std::size_t(10), reader.ciphertext_length);
+assert_equals(std::size_t(8), reader.mac_length);
+
+assert_equals(ratchetkey, reader.ratchet_key, 10);
+assert_equals(ciphertext, reader.ciphertext, 10);
+assert_equals(hmacsha2, reader.mac, 8);
+
+
+} /* Message decode test */
+
+{ /* Message encode test */
+
+TestCase test_case("Message encode test");
+
+std::size_t length = axolotl::encode_message_length(1, 10, 10, 8);
+assert_equals(std::size_t(35), length);
+
+std::uint8_t output[length];
+
+axolotl::MessageWriter writer(axolotl::encode_message(3, 1, 10, 10, output));
+assert_equals(std::size_t(27), writer.body_length);
+
+std::memcpy(writer.ratchet_key, ratchetkey, 10);
+std::memcpy(writer.ciphertext, ciphertext, 10);
+std::memcpy(writer.mac, hmacsha2, 8);
+
+assert_equals(message2, output, 35);
+
+
+} /* Message encode test */
+
+}