Unit tests for StreamEncrypterImpl.

briar-tests/src/org/briarproject/crypto/TestAuthenticatedCipher.java

@@ -0,0 +1,45 @@
+package org.briarproject.crypto;
+
+import static org.briarproject.api.transport.TransportConstants.MAC_LENGTH;
+
+import java.security.GeneralSecurityException;
+
+import org.briarproject.api.crypto.AuthenticatedCipher;
+import org.briarproject.api.crypto.SecretKey;
+
+class TestAuthenticatedCipher implements AuthenticatedCipher {
+
+	private static final int BLOCK_BYTES = 16;
+
+	private boolean encrypt = false;
+
+	public void init(boolean encrypt, SecretKey key, byte[] iv, byte[] aad)
+			throws GeneralSecurityException {
+		this.encrypt = encrypt;
+	}
+
+	public int process(byte[] input, int inputOff, int len, byte[] output,
+			int outputOff) throws GeneralSecurityException {
+		if(encrypt) {
+			System.arraycopy(input, inputOff, output, outputOff, len);
+			for(int i = 0; i < MAC_LENGTH; i++)
+				output[outputOff + len + i] = 0;
+			return len + MAC_LENGTH;
+		} else {
+			for(int i = 0; i < MAC_LENGTH; i++)
+				if(input[inputOff + len - MAC_LENGTH + i] != 0)
+					throw new GeneralSecurityException();
+			System.arraycopy(input, inputOff, output, outputOff,
+					len - MAC_LENGTH);
+			return len - MAC_LENGTH;
+		}
+	}
+
+	public int getMacLength() {
+		return MAC_LENGTH;
+	}
+
+	public int getBlockSize() {
+		return BLOCK_BYTES;
+	}
+}