/*
* Syncany, www.syncany.org
* Copyright (C) 2011-2014 Philipp C. Heckel <philipp.heckel@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.syncany.tests.crypto;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotSame;
import javax.crypto.spec.SecretKeySpec;
import org.junit.Test;
import org.syncany.config.Logging;
import org.syncany.crypto.CipherSession;
import org.syncany.crypto.CipherSpec;
import org.syncany.crypto.CipherSpecs;
import org.syncany.crypto.CipherUtil;
import org.syncany.crypto.SaltedSecretKey;
import org.syncany.util.StringUtil;
public class CipherSessionTest {
static {
Logging.init();
}
@Test
public void testCipherSessionWriteKeyReuseCountOfTwo() throws Exception {
SaltedSecretKey masterKey = createDummyMasterKey();
CipherSession cipherSession = new CipherSession(masterKey, 999, 2);
CipherSpec cipherSpecAes128 = CipherSpecs.getCipherSpec(CipherSpecs.AES_128_GCM);
CipherSpec cipherSpecTwofish128 = CipherSpecs.getCipherSpec(CipherSpecs.TWOFISH_128_GCM);
SaltedSecretKey writeSecretKey1Aes128 = cipherSession.getWriteSecretKey(cipherSpecAes128);
SaltedSecretKey writeSecretKey2Aes128 = cipherSession.getWriteSecretKey(cipherSpecAes128);
SaltedSecretKey writeSecretKey3Aes128 = cipherSession.getWriteSecretKey(cipherSpecAes128);
SaltedSecretKey writeSecretKey1Twofish128 = cipherSession.getWriteSecretKey(cipherSpecTwofish128);
SaltedSecretKey writeSecretKey2Twofish128 = cipherSession.getWriteSecretKey(cipherSpecTwofish128);
SaltedSecretKey writeSecretKey3Twofish128 = cipherSession.getWriteSecretKey(cipherSpecTwofish128);
assertEquals(writeSecretKey1Aes128, writeSecretKey2Aes128);
assertNotSame(writeSecretKey1Aes128, writeSecretKey3Aes128);
assertEquals(writeSecretKey1Twofish128, writeSecretKey2Twofish128);
assertNotSame(writeSecretKey1Twofish128, writeSecretKey3Twofish128);
assertNotSame(writeSecretKey1Aes128, writeSecretKey1Twofish128);
}
@Test
public void testCipherSessionReadKeyCacheSizeOfThree() throws Exception {
SaltedSecretKey masterKey = createDummyMasterKey();
CipherSession cipherSession = new CipherSession(masterKey, 2, 999);
CipherSpec cipherSpecAes128 = CipherSpecs.getCipherSpec(CipherSpecs.AES_128_GCM);
byte[] readKeySalt1 = CipherUtil.createRandomArray(cipherSpecAes128.getKeySize());
byte[] readKeySalt2 = CipherUtil.createRandomArray(cipherSpecAes128.getKeySize());
byte[] readKeySalt3 = CipherUtil.createRandomArray(cipherSpecAes128.getKeySize());
SaltedSecretKey readSecretKey1Aes128 = cipherSession.getReadSecretKey(cipherSpecAes128, readKeySalt1);
SaltedSecretKey readSecretKey2Aes128 = cipherSession.getReadSecretKey(cipherSpecAes128, readKeySalt2);
SaltedSecretKey readSecretKey3Aes128 = cipherSession.getReadSecretKey(cipherSpecAes128, readKeySalt3);
assertNotSame(readSecretKey1Aes128, readSecretKey2Aes128);
assertNotSame(readSecretKey1Aes128, readSecretKey3Aes128);
assertNotSame(readSecretKey2Aes128, readSecretKey3Aes128);
// TODO [medium] This does NOT TEST the actual read cache. How to test this. The cache is completely hidden/private?!
}
private SaltedSecretKey createDummyMasterKey() {
return new SaltedSecretKey(
new SecretKeySpec(
StringUtil.fromHex("44fda24d53b29828b62c362529bd9df5c8a92c2736bcae3a28b3d7b44488e36e246106aa5334813028abb2048eeb5e177df1c702d93cf82aeb7b6d59a8534ff0"),
"AnyAlgorithm"
),
StringUtil.fromHex("157599349e0f1bc713afff442db9d4c3201324073d51cb33407600f305500aa3fdb31136cb1f37bd51a48f183844257d42010a36133b32b424dd02bc63b349bc")
);
}
}