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import static org.briarproject.api.transport.TransportConstants.HEADER_LENGTH;
import static org.briarproject.api.transport.TransportConstants.MAC_LENGTH;
import static org.briarproject.api.transport.TransportConstants.TAG_LENGTH;
import static org.junit.Assert.assertArrayEquals;
import java.io.ByteArrayOutputStream;
import java.util.Random;
import org.briarproject.BriarTestCase;
import org.briarproject.api.crypto.SecretKey;
import org.junit.Test;
public class StreamEncrypterImplTest extends BriarTestCase {
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private final AuthenticatedCipher frameCipher;
private final SecretKey frameKey;
private final byte[] tag;
public StreamEncrypterImplTest() {
frameCipher = new TestAuthenticatedCipher();
frameKey = new SecretKey(new byte[32]);
tag = new byte[TAG_LENGTH];
new Random().nextBytes(tag);
}
@Test
public void testWriteUnpaddedNonFinalFrameWithTag() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, tag);
int payloadLength = 123;
byte[] payload = new byte[payloadLength];
new Random().nextBytes(payload);
s.writeFrame(payload, payloadLength, 0, false);
byte[] header = new byte[HEADER_LENGTH];
FrameEncoder.encodeHeader(header, false, payloadLength, 0);
byte[] expected = new byte[TAG_LENGTH + HEADER_LENGTH + payloadLength
+ MAC_LENGTH];
System.arraycopy(tag, 0, expected, 0, TAG_LENGTH);
System.arraycopy(header, 0, expected, TAG_LENGTH, HEADER_LENGTH);
System.arraycopy(payload, 0, expected, TAG_LENGTH + HEADER_LENGTH,
payloadLength);
assertArrayEquals(expected, out.toByteArray());
}
@Test
public void testWriteUnpaddedFinalFrameWithTag() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, tag);
int payloadLength = 123;
byte[] payload = new byte[payloadLength];
new Random().nextBytes(payload);
s.writeFrame(payload, payloadLength, 0, true);
byte[] header = new byte[HEADER_LENGTH];
FrameEncoder.encodeHeader(header, true, payloadLength, 0);
byte[] expected = new byte[TAG_LENGTH + HEADER_LENGTH + payloadLength
+ MAC_LENGTH];
System.arraycopy(tag, 0, expected, 0, TAG_LENGTH);
System.arraycopy(header, 0, expected, TAG_LENGTH, HEADER_LENGTH);
System.arraycopy(payload, 0, expected, TAG_LENGTH + HEADER_LENGTH,
payloadLength);
assertArrayEquals(expected, out.toByteArray());
}
@Test
public void testWriteUnpaddedNonFinalFrameWithoutTag() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, null);
int payloadLength = 123;
byte[] payload = new byte[payloadLength];
new Random().nextBytes(payload);
s.writeFrame(payload, payloadLength, 0, false);
byte[] header = new byte[HEADER_LENGTH];
FrameEncoder.encodeHeader(header, false, payloadLength, 0);
byte[] expected = new byte[HEADER_LENGTH + payloadLength + MAC_LENGTH];
System.arraycopy(header, 0, expected, 0, HEADER_LENGTH);
System.arraycopy(payload, 0, expected, HEADER_LENGTH, payloadLength);
assertArrayEquals(expected, out.toByteArray());
}
@Test
public void testWriteUnpaddedFinalFrameWithoutTag() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, null);
int payloadLength = 123;
byte[] payload = new byte[payloadLength];
new Random().nextBytes(payload);
s.writeFrame(payload, payloadLength, 0, true);
byte[] header = new byte[HEADER_LENGTH];
FrameEncoder.encodeHeader(header, true, payloadLength, 0);
byte[] expected = new byte[HEADER_LENGTH + payloadLength + MAC_LENGTH];
System.arraycopy(header, 0, expected, 0, HEADER_LENGTH);
System.arraycopy(payload, 0, expected, HEADER_LENGTH, payloadLength);
assertArrayEquals(expected, out.toByteArray());
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public void testWritePaddedNonFinalFrameWithTag() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, tag);
int payloadLength = 123, paddingLength = 234;
byte[] payload = new byte[payloadLength];
new Random().nextBytes(payload);
s.writeFrame(payload, payloadLength, paddingLength, false);
byte[] header = new byte[HEADER_LENGTH];
FrameEncoder.encodeHeader(header, false, payloadLength, paddingLength);
byte[] expected = new byte[TAG_LENGTH + HEADER_LENGTH + payloadLength
+ paddingLength + MAC_LENGTH];
System.arraycopy(tag, 0, expected, 0, TAG_LENGTH);
System.arraycopy(header, 0, expected, TAG_LENGTH, HEADER_LENGTH);
System.arraycopy(payload, 0, expected, TAG_LENGTH + HEADER_LENGTH,
payloadLength);
assertArrayEquals(expected, out.toByteArray());
}
@Test
public void testWritePaddedFinalFrameWithTag() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, tag);
int payloadLength = 123, paddingLength = 234;
byte[] payload = new byte[payloadLength];
new Random().nextBytes(payload);
s.writeFrame(payload, payloadLength, paddingLength, true);
byte[] header = new byte[HEADER_LENGTH];
FrameEncoder.encodeHeader(header, true, payloadLength, paddingLength);
byte[] expected = new byte[TAG_LENGTH + HEADER_LENGTH + payloadLength
+ paddingLength + MAC_LENGTH];
System.arraycopy(tag, 0, expected, 0, TAG_LENGTH);
System.arraycopy(header, 0, expected, TAG_LENGTH, HEADER_LENGTH);
System.arraycopy(payload, 0, expected, TAG_LENGTH + HEADER_LENGTH,
payloadLength);
assertArrayEquals(expected, out.toByteArray());
}
@Test
public void testWritePaddedNonFinalFrameWithoutTag() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, null);
int payloadLength = 123, paddingLength = 234;
byte[] payload = new byte[payloadLength];
new Random().nextBytes(payload);
s.writeFrame(payload, payloadLength, paddingLength, false);
byte[] header = new byte[HEADER_LENGTH];
FrameEncoder.encodeHeader(header, false, payloadLength, paddingLength);
byte[] expected = new byte[HEADER_LENGTH + payloadLength
+ paddingLength + MAC_LENGTH];
System.arraycopy(header, 0, expected, 0, HEADER_LENGTH);
System.arraycopy(payload, 0, expected, HEADER_LENGTH, payloadLength);
assertArrayEquals(expected, out.toByteArray());
}
@Test
public void testWritePaddedFinalFrameWithoutTag() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, null);
int payloadLength = 123, paddingLength = 234;
byte[] payload = new byte[payloadLength];
new Random().nextBytes(payload);
s.writeFrame(payload, payloadLength, paddingLength, true);
byte[] header = new byte[HEADER_LENGTH];
FrameEncoder.encodeHeader(header, true, payloadLength, paddingLength);
byte[] expected = new byte[HEADER_LENGTH + payloadLength
+ paddingLength + MAC_LENGTH];
System.arraycopy(header, 0, expected, 0, HEADER_LENGTH);
System.arraycopy(payload, 0, expected, HEADER_LENGTH, payloadLength);
assertArrayEquals(expected, out.toByteArray());
}
@Test
public void testWriteTwoFrames() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, null);
int payloadLength = 123, paddingLength = 234;
byte[] payload = new byte[payloadLength];
new Random().nextBytes(payload);
int payloadLength1 = 345, paddingLength1 = 456;
byte[] payload1 = new byte[payloadLength1];
new Random().nextBytes(payload1);
s.writeFrame(payload, payloadLength, paddingLength, false);
s.writeFrame(payload1, payloadLength1, paddingLength1, true);
byte[] header = new byte[HEADER_LENGTH];
FrameEncoder.encodeHeader(header, false, payloadLength, paddingLength);
byte[] header1 = new byte[HEADER_LENGTH];
FrameEncoder.encodeHeader(header1, true, payloadLength1,
paddingLength1);
byte[] expected = new byte[HEADER_LENGTH + payloadLength
+ paddingLength + MAC_LENGTH
+ HEADER_LENGTH + payloadLength1
+ paddingLength1 + MAC_LENGTH];
System.arraycopy(header, 0, expected, 0, HEADER_LENGTH);
System.arraycopy(payload, 0, expected, HEADER_LENGTH, payloadLength);
System.arraycopy(header1, 0, expected, HEADER_LENGTH + payloadLength
+ paddingLength + MAC_LENGTH, HEADER_LENGTH);
System.arraycopy(payload1, 0, expected, HEADER_LENGTH + payloadLength
+ paddingLength + MAC_LENGTH + HEADER_LENGTH, payloadLength1);
assertArrayEquals(expected, out.toByteArray());
}
@Test
public void testFlushWritesTagIfNotAlreadyWritten() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, tag);
s.flush();
assertArrayEquals(tag, out.toByteArray());
}
@Test
public void testFlushDoesNotWriteTagIfAlreadyWritten() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, tag);
s.flush();
s.flush();
assertArrayEquals(tag, out.toByteArray());
}
@Test
public void testFlushDoesNotWriteTagIfNull() throws Exception {
ByteArrayOutputStream out = new ByteArrayOutputStream();
StreamEncrypterImpl s = new StreamEncrypterImpl(out, frameCipher,
frameKey, null);
s.flush();
assertEquals(0, out.size());