mirror of
https://code.briarproject.org/briar/briar.git
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Implement stream header for BTPv2. #111
This commit is contained in:
akwizgran
@@ -1,261 +1,345 @@
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package org.briarproject.crypto;
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import org.briarproject.BriarTestCase;
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import org.briarproject.TestUtils;
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import org.briarproject.api.crypto.SecretKey;
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import org.junit.Test;
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import java.io.ByteArrayOutputStream;
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import java.util.Random;
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import static org.briarproject.api.transport.TransportConstants.HEADER_LENGTH;
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import static org.briarproject.api.transport.TransportConstants.FRAME_HEADER_LENGTH;
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import static org.briarproject.api.transport.TransportConstants.MAC_LENGTH;
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import static org.briarproject.api.transport.TransportConstants.STREAM_HEADER_IV_LENGTH;
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import static org.briarproject.api.transport.TransportConstants.TAG_LENGTH;
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import static org.junit.Assert.assertArrayEquals;
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import static org.junit.Assert.assertEquals;
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public class StreamEncrypterImplTest extends BriarTestCase {
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private final AuthenticatedCipher frameCipher;
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private final SecretKey frameKey;
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private final byte[] tag;
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private final AuthenticatedCipher cipher;
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private final SecretKey streamHeaderKey, frameKey;
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private final byte[] tag, streamHeaderIv;
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private final Random random;
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public StreamEncrypterImplTest() {
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frameCipher = new TestAuthenticatedCipher();
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frameKey = new SecretKey(new byte[32]);
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cipher = new TestAuthenticatedCipher(); // Null cipher
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streamHeaderKey = TestUtils.createSecretKey();
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frameKey = TestUtils.createSecretKey();
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tag = new byte[TAG_LENGTH];
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new Random().nextBytes(tag);
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streamHeaderIv = new byte[STREAM_HEADER_IV_LENGTH];
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random = new Random();
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random.nextBytes(tag);
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random.nextBytes(streamHeaderIv);
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}
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@Test
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public void testWriteUnpaddedNonFinalFrameWithTag() throws Exception {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
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frameKey, tag);
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, tag,
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streamHeaderIv, streamHeaderKey, frameKey);
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int payloadLength = 123;
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byte[] payload = new byte[payloadLength];
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new Random().nextBytes(payload);
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random.nextBytes(payload);
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s.writeFrame(payload, payloadLength, 0, false);
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byte[] header = new byte[HEADER_LENGTH];
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FrameEncoder.encodeHeader(header, false, payloadLength, 0);
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int frameLength = HEADER_LENGTH + payloadLength + MAC_LENGTH;
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byte[] expected = new byte[TAG_LENGTH + frameLength];
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System.arraycopy(tag, 0, expected, 0, TAG_LENGTH);
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System.arraycopy(header, 0, expected, TAG_LENGTH, HEADER_LENGTH);
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System.arraycopy(payload, 0, expected, TAG_LENGTH + HEADER_LENGTH,
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payloadLength);
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assertArrayEquals(expected, out.toByteArray());
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// Expect the tag, stream header, frame header, payload and MAC
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ByteArrayOutputStream expected = new ByteArrayOutputStream();
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expected.write(tag);
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expected.write(streamHeaderIv);
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expected.write(frameKey.getBytes());
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expected.write(new byte[MAC_LENGTH]);
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byte[] expectedFrameHeader = new byte[FRAME_HEADER_LENGTH];
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FrameEncoder.encodeHeader(expectedFrameHeader, false, payloadLength, 0);
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expected.write(expectedFrameHeader);
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expected.write(payload);
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expected.write(new byte[MAC_LENGTH]);
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assertArrayEquals(expected.toByteArray(), out.toByteArray());
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}
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@Test
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public void testWriteUnpaddedFinalFrameWithTag() throws Exception {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
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frameKey, tag);
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, tag,
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streamHeaderIv, streamHeaderKey, frameKey);
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int payloadLength = 123;
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int frameLength = HEADER_LENGTH + payloadLength + MAC_LENGTH;
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byte[] payload = new byte[payloadLength];
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new Random().nextBytes(payload);
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random.nextBytes(payload);
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s.writeFrame(payload, payloadLength, 0, true);
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byte[] header = new byte[HEADER_LENGTH];
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FrameEncoder.encodeHeader(header, true, payloadLength, 0);
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byte[] expected = new byte[TAG_LENGTH + frameLength];
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System.arraycopy(tag, 0, expected, 0, TAG_LENGTH);
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System.arraycopy(header, 0, expected, TAG_LENGTH, HEADER_LENGTH);
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System.arraycopy(payload, 0, expected, TAG_LENGTH + HEADER_LENGTH,
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payloadLength);
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assertArrayEquals(expected, out.toByteArray());
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// Expect the tag, stream header, frame header, payload and MAC
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ByteArrayOutputStream expected = new ByteArrayOutputStream();
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expected.write(tag);
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expected.write(streamHeaderIv);
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expected.write(frameKey.getBytes());
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expected.write(new byte[MAC_LENGTH]);
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byte[] expectedFrameHeader = new byte[FRAME_HEADER_LENGTH];
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FrameEncoder.encodeHeader(expectedFrameHeader, true, payloadLength, 0);
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expected.write(expectedFrameHeader);
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expected.write(payload);
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expected.write(new byte[MAC_LENGTH]);
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assertArrayEquals(expected.toByteArray(), out.toByteArray());
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}
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@Test
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public void testWriteUnpaddedNonFinalFrameWithoutTag() throws Exception {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
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frameKey, null);
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, null,
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streamHeaderIv, streamHeaderKey, frameKey);
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int payloadLength = 123;
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int frameLength = HEADER_LENGTH + payloadLength + MAC_LENGTH;
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byte[] payload = new byte[payloadLength];
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new Random().nextBytes(payload);
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random.nextBytes(payload);
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s.writeFrame(payload, payloadLength, 0, false);
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byte[] header = new byte[HEADER_LENGTH];
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FrameEncoder.encodeHeader(header, false, payloadLength, 0);
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byte[] expected = new byte[frameLength];
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System.arraycopy(header, 0, expected, 0, HEADER_LENGTH);
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System.arraycopy(payload, 0, expected, HEADER_LENGTH, payloadLength);
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assertArrayEquals(expected, out.toByteArray());
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// Expect the stream header, frame header, payload and MAC
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ByteArrayOutputStream expected = new ByteArrayOutputStream();
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expected.write(streamHeaderIv);
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expected.write(frameKey.getBytes());
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expected.write(new byte[MAC_LENGTH]);
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byte[] expectedFrameHeader = new byte[FRAME_HEADER_LENGTH];
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FrameEncoder.encodeHeader(expectedFrameHeader, false, payloadLength, 0);
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expected.write(expectedFrameHeader);
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expected.write(payload);
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expected.write(new byte[MAC_LENGTH]);
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assertArrayEquals(expected.toByteArray(), out.toByteArray());
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}
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@Test
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public void testWriteUnpaddedFinalFrameWithoutTag() throws Exception {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
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frameKey, null);
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, null,
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streamHeaderIv, streamHeaderKey, frameKey);
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int payloadLength = 123;
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int frameLength = HEADER_LENGTH + payloadLength + MAC_LENGTH;
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byte[] payload = new byte[payloadLength];
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new Random().nextBytes(payload);
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random.nextBytes(payload);
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s.writeFrame(payload, payloadLength, 0, true);
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byte[] header = new byte[HEADER_LENGTH];
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FrameEncoder.encodeHeader(header, true, payloadLength, 0);
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byte[] expected = new byte[frameLength];
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System.arraycopy(header, 0, expected, 0, HEADER_LENGTH);
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System.arraycopy(payload, 0, expected, HEADER_LENGTH, payloadLength);
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assertArrayEquals(expected, out.toByteArray());
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// Expect the stream header, frame header, payload and MAC
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ByteArrayOutputStream expected = new ByteArrayOutputStream();
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expected.write(streamHeaderIv);
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expected.write(frameKey.getBytes());
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expected.write(new byte[MAC_LENGTH]);
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byte[] expectedFrameHeader = new byte[FRAME_HEADER_LENGTH];
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FrameEncoder.encodeHeader(expectedFrameHeader, true, payloadLength, 0);
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expected.write(expectedFrameHeader);
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expected.write(payload);
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expected.write(new byte[MAC_LENGTH]);
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assertArrayEquals(expected.toByteArray(), out.toByteArray());
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}
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@Test
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public void testWritePaddedNonFinalFrameWithTag() throws Exception {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
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frameKey, tag);
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, tag,
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streamHeaderIv, streamHeaderKey, frameKey);
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int payloadLength = 123, paddingLength = 234;
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int frameLength = HEADER_LENGTH + payloadLength + paddingLength
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+ MAC_LENGTH;
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byte[] payload = new byte[payloadLength];
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new Random().nextBytes(payload);
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random.nextBytes(payload);
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s.writeFrame(payload, payloadLength, paddingLength, false);
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byte[] header = new byte[HEADER_LENGTH];
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FrameEncoder.encodeHeader(header, false, payloadLength, paddingLength);
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byte[] expected = new byte[TAG_LENGTH + frameLength];
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System.arraycopy(tag, 0, expected, 0, TAG_LENGTH);
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System.arraycopy(header, 0, expected, TAG_LENGTH, HEADER_LENGTH);
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System.arraycopy(payload, 0, expected, TAG_LENGTH + HEADER_LENGTH,
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payloadLength);
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assertArrayEquals(expected, out.toByteArray());
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// Expect the tag, stream header, frame header, payload, padding and MAC
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ByteArrayOutputStream expected = new ByteArrayOutputStream();
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expected.write(tag);
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expected.write(streamHeaderIv);
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expected.write(frameKey.getBytes());
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expected.write(new byte[MAC_LENGTH]);
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byte[] expectedFrameHeader = new byte[FRAME_HEADER_LENGTH];
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FrameEncoder.encodeHeader(expectedFrameHeader, false, payloadLength,
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paddingLength);
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expected.write(expectedFrameHeader);
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expected.write(payload);
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expected.write(new byte[paddingLength]);
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expected.write(new byte[MAC_LENGTH]);
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assertArrayEquals(expected.toByteArray(), out.toByteArray());
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}
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@Test
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public void testWritePaddedFinalFrameWithTag() throws Exception {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
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frameKey, tag);
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, tag,
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streamHeaderIv, streamHeaderKey, frameKey);
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int payloadLength = 123, paddingLength = 234;
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int frameLength = HEADER_LENGTH + payloadLength + paddingLength
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+ MAC_LENGTH;
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byte[] payload = new byte[payloadLength];
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new Random().nextBytes(payload);
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random.nextBytes(payload);
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s.writeFrame(payload, payloadLength, paddingLength, true);
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byte[] header = new byte[HEADER_LENGTH];
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FrameEncoder.encodeHeader(header, true, payloadLength, paddingLength);
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byte[] expected = new byte[TAG_LENGTH + frameLength];
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System.arraycopy(tag, 0, expected, 0, TAG_LENGTH);
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System.arraycopy(header, 0, expected, TAG_LENGTH, HEADER_LENGTH);
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System.arraycopy(payload, 0, expected, TAG_LENGTH + HEADER_LENGTH,
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payloadLength);
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assertArrayEquals(expected, out.toByteArray());
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// Expect the tag, stream header, frame header, payload, padding and MAC
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ByteArrayOutputStream expected = new ByteArrayOutputStream();
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expected.write(tag);
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expected.write(streamHeaderIv);
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expected.write(frameKey.getBytes());
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expected.write(new byte[MAC_LENGTH]);
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byte[] expectedFrameHeader = new byte[FRAME_HEADER_LENGTH];
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FrameEncoder.encodeHeader(expectedFrameHeader, true, payloadLength,
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paddingLength);
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expected.write(expectedFrameHeader);
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expected.write(payload);
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expected.write(new byte[paddingLength]);
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expected.write(new byte[MAC_LENGTH]);
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assertArrayEquals(expected.toByteArray(), out.toByteArray());
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}
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@Test
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public void testWritePaddedNonFinalFrameWithoutTag() throws Exception {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
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frameKey, null);
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, null,
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streamHeaderIv, streamHeaderKey, frameKey);
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int payloadLength = 123, paddingLength = 234;
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int frameLength = HEADER_LENGTH + payloadLength + paddingLength
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+ MAC_LENGTH;
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byte[] payload = new byte[payloadLength];
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new Random().nextBytes(payload);
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random.nextBytes(payload);
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s.writeFrame(payload, payloadLength, paddingLength, false);
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byte[] header = new byte[HEADER_LENGTH];
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FrameEncoder.encodeHeader(header, false, payloadLength, paddingLength);
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byte[] expected = new byte[frameLength];
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System.arraycopy(header, 0, expected, 0, HEADER_LENGTH);
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System.arraycopy(payload, 0, expected, HEADER_LENGTH, payloadLength);
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assertArrayEquals(expected, out.toByteArray());
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// Expect the stream header, frame header, payload, padding and MAC
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ByteArrayOutputStream expected = new ByteArrayOutputStream();
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expected.write(streamHeaderIv);
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expected.write(frameKey.getBytes());
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expected.write(new byte[MAC_LENGTH]);
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byte[] expectedFrameHeader = new byte[FRAME_HEADER_LENGTH];
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FrameEncoder.encodeHeader(expectedFrameHeader, false, payloadLength,
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paddingLength);
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expected.write(expectedFrameHeader);
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expected.write(payload);
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expected.write(new byte[paddingLength]);
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expected.write(new byte[MAC_LENGTH]);
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assertArrayEquals(expected.toByteArray(), out.toByteArray());
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}
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@Test
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public void testWritePaddedFinalFrameWithoutTag() throws Exception {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
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frameKey, null);
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, null,
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streamHeaderIv, streamHeaderKey, frameKey);
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int payloadLength = 123, paddingLength = 234;
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int frameLength = HEADER_LENGTH + payloadLength + paddingLength
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+ MAC_LENGTH;
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byte[] payload = new byte[payloadLength];
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new Random().nextBytes(payload);
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random.nextBytes(payload);
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s.writeFrame(payload, payloadLength, paddingLength, true);
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byte[] header = new byte[HEADER_LENGTH];
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FrameEncoder.encodeHeader(header, true, payloadLength, paddingLength);
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byte[] expected = new byte[frameLength];
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System.arraycopy(header, 0, expected, 0, HEADER_LENGTH);
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System.arraycopy(payload, 0, expected, HEADER_LENGTH, payloadLength);
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assertArrayEquals(expected, out.toByteArray());
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// Expect the stream header, frame header, payload, padding and MAC
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ByteArrayOutputStream expected = new ByteArrayOutputStream();
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expected.write(streamHeaderIv);
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expected.write(frameKey.getBytes());
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expected.write(new byte[MAC_LENGTH]);
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byte[] expectedFrameHeader = new byte[FRAME_HEADER_LENGTH];
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FrameEncoder.encodeHeader(expectedFrameHeader, true, payloadLength,
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paddingLength);
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expected.write(expectedFrameHeader);
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expected.write(payload);
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expected.write(new byte[paddingLength]);
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expected.write(new byte[MAC_LENGTH]);
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assertArrayEquals(expected.toByteArray(), out.toByteArray());
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}
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@Test
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public void testWriteTwoFrames() throws Exception {
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public void testWriteTwoFramesWithTag() throws Exception {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
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frameKey, null);
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, tag,
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streamHeaderIv, streamHeaderKey, frameKey);
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int payloadLength = 123, paddingLength = 234;
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int frameLength = HEADER_LENGTH + payloadLength + paddingLength
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+ MAC_LENGTH;
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byte[] payload = new byte[payloadLength];
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new Random().nextBytes(payload);
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random.nextBytes(payload);
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int payloadLength1 = 345, paddingLength1 = 456;
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int frameLength1 = HEADER_LENGTH + payloadLength1 + paddingLength1
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+ MAC_LENGTH;
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byte[] payload1 = new byte[payloadLength1];
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new Random().nextBytes(payload1);
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random.nextBytes(payload1);
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s.writeFrame(payload, payloadLength, paddingLength, false);
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s.writeFrame(payload1, payloadLength1, paddingLength1, true);
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byte[] header = new byte[HEADER_LENGTH];
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FrameEncoder.encodeHeader(header, false, payloadLength, paddingLength);
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byte[] header1 = new byte[HEADER_LENGTH];
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FrameEncoder.encodeHeader(header1, true, payloadLength1,
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// Expect the tag, stream header, first frame header, payload, padding,
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// MAC, second frame header, payload, padding, MAC
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ByteArrayOutputStream expected = new ByteArrayOutputStream();
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expected.write(tag);
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expected.write(streamHeaderIv);
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expected.write(frameKey.getBytes());
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expected.write(new byte[MAC_LENGTH]);
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byte[] expectedFrameHeader = new byte[FRAME_HEADER_LENGTH];
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FrameEncoder.encodeHeader(expectedFrameHeader, false, payloadLength,
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paddingLength);
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expected.write(expectedFrameHeader);
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expected.write(payload);
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expected.write(new byte[paddingLength]);
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expected.write(new byte[MAC_LENGTH]);
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byte[] expectedFrameHeader1 = new byte[FRAME_HEADER_LENGTH];
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FrameEncoder.encodeHeader(expectedFrameHeader1, true, payloadLength1,
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paddingLength1);
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byte[] expected = new byte[frameLength + frameLength1];
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System.arraycopy(header, 0, expected, 0, HEADER_LENGTH);
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System.arraycopy(payload, 0, expected, HEADER_LENGTH, payloadLength);
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System.arraycopy(header1, 0, expected, frameLength, HEADER_LENGTH);
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System.arraycopy(payload1, 0, expected, frameLength + HEADER_LENGTH,
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payloadLength1);
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assertArrayEquals(expected, out.toByteArray());
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expected.write(expectedFrameHeader1);
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expected.write(payload1);
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expected.write(new byte[paddingLength1]);
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expected.write(new byte[MAC_LENGTH]);
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assertArrayEquals(expected.toByteArray(), out.toByteArray());
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}
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@Test
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public void testFlushWritesTagIfNotAlreadyWritten() throws Exception {
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public void testFlushWritesTagAndStreamHeaderIfNotAlreadyWritten()
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throws Exception {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
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frameKey, tag);
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StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, tag,
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streamHeaderIv, streamHeaderKey, frameKey);
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// Flush the stream once
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s.flush();
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assertArrayEquals(tag, out.toByteArray());
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// Expect the tag and stream header
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ByteArrayOutputStream expected = new ByteArrayOutputStream();
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expected.write(tag);
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expected.write(streamHeaderIv);
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expected.write(frameKey.getBytes());
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expected.write(new byte[MAC_LENGTH]);
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|
||||
assertArrayEquals(expected.toByteArray(), out.toByteArray());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testFlushDoesNotWriteTagIfAlreadyWritten() throws Exception {
|
||||
public void testFlushDoesNotWriteTagOrStreamHeaderIfAlreadyWritten()
|
||||
throws Exception {
|
||||
ByteArrayOutputStream out = new ByteArrayOutputStream();
|
||||
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
|
||||
frameKey, tag);
|
||||
StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, tag,
|
||||
streamHeaderIv, streamHeaderKey, frameKey);
|
||||
|
||||
// Flush the stream twice
|
||||
s.flush();
|
||||
s.flush();
|
||||
assertArrayEquals(tag, out.toByteArray());
|
||||
|
||||
// Expect the tag and stream header
|
||||
ByteArrayOutputStream expected = new ByteArrayOutputStream();
|
||||
expected.write(tag);
|
||||
expected.write(streamHeaderIv);
|
||||
expected.write(frameKey.getBytes());
|
||||
expected.write(new byte[MAC_LENGTH]);
|
||||
|
||||
assertArrayEquals(expected.toByteArray(), out.toByteArray());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testFlushDoesNotWriteTagIfNull() throws Exception {
|
||||
ByteArrayOutputStream out = new ByteArrayOutputStream();
|
||||
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
|
||||
frameKey, null);
|
||||
StreamEncrypterImpl s = new StreamEncrypterImpl(out, cipher, null,
|
||||
streamHeaderIv, streamHeaderKey, frameKey);
|
||||
|
||||
// Flush the stream once
|
||||
s.flush();
|
||||
assertEquals(0, out.size());
|
||||
|
||||
// Expect the stream header
|
||||
ByteArrayOutputStream expected = new ByteArrayOutputStream();
|
||||
expected.write(streamHeaderIv);
|
||||
expected.write(frameKey.getBytes());
|
||||
expected.write(new byte[MAC_LENGTH]);
|
||||
|
||||
assertArrayEquals(expected.toByteArray(), out.toByteArray());
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user