/*
* Copyright (C)2009 - SSHJ Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.schmizz.sshj.transport.mac;
import net.schmizz.sshj.common.SSHRuntimeException;
import org.bouncycastle.util.encoders.Hex;
import org.junit.Test;
import java.nio.charset.Charset;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
public class BaseMacTest {
private static final Charset CHARSET = Charset.forName("US-ASCII");
private static final byte[] PLAIN_TEXT = "Hello World".getBytes(CHARSET);
private static final String EXPECTED_HMAC = "24ddeed57ad91465c5b59dce74ef73778bfb0cb9";
private static final String KEY = "et1Quo5ooCie6theel8i";
@Test
public void testResizeTooBigKeys() {
BaseMAC hmac = new HMACSHA1();
hmac.init((KEY + "foo").getBytes(CHARSET));
hmac.update(PLAIN_TEXT);
assertThat(Hex.toHexString(hmac.doFinal()), is(EXPECTED_HMAC));
}
@Test(expected = SSHRuntimeException.class)
public void testUnknownAlgorithm() {
// hopefully a algorithm with that name won't be created :-)
BaseMAC hmac = new BaseMAC("AlgorithmThatDoesNotExist", 20, 20);
hmac.init((KEY + "foo").getBytes(CHARSET));
hmac.update(PLAIN_TEXT);
assertThat(Hex.toHexString(hmac.doFinal()), is(EXPECTED_HMAC));
}
@Test
public void testUpdateWithDoFinal() {
BaseMAC hmac = initHmac();
hmac.update(PLAIN_TEXT);
assertThat(Hex.toHexString(hmac.doFinal()), is(EXPECTED_HMAC));
}
@Test
public void testUpdateWithRange() {
BaseMAC hmac = initHmac();
// a leading and trailing byte to the plaintext
byte[] plainText = new byte[PLAIN_TEXT.length + 2];
System.arraycopy(PLAIN_TEXT, 0, plainText, 1, PLAIN_TEXT.length);
// update with the range from the second to penultimate byte
hmac.update(plainText, 1, PLAIN_TEXT.length);
assertThat(Hex.toHexString(hmac.doFinal()), is(EXPECTED_HMAC));
}
@Test
public void testDoFinalWithInput() {
BaseMAC hmac = initHmac();
assertThat(Hex.toHexString(hmac.doFinal(PLAIN_TEXT)), is(EXPECTED_HMAC));
}
@Test
public void testUpdateWithDoFinalWithResultBuffer() {
BaseMAC hmac = initHmac();
byte[] resultBuf = new byte[20];
hmac.update(PLAIN_TEXT);
hmac.doFinal(resultBuf, 0);
assertThat(Hex.toHexString(resultBuf), is(EXPECTED_HMAC));
}
private BaseMAC initHmac() {
BaseMAC hmac = new HMACSHA1();
hmac.init(KEY.getBytes(CHARSET));
return hmac;
}
}