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/*
* Copyright (C) 2009 The Android Open Source Project
*
* 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 tests.security;
import java.security.AlgorithmParameters;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import junit.framework.Assert;
public class AlgorithmParameterSymmetricHelper extends TestHelper<AlgorithmParameters> {
private static final String plainData = "some data to encrypt and decrypt";
private final String algorithmName;
private final int keySize;
private String blockmode;
public AlgorithmParameterSymmetricHelper(String algorithmName, int keySize) {
this.algorithmName = algorithmName;
this.keySize = keySize;
}
public AlgorithmParameterSymmetricHelper(String algorithmName, String blockmode, int keySize) {
this(algorithmName, keySize);
this.blockmode = blockmode;
}
@Override
public void test(AlgorithmParameters parameters) {
KeyGenerator generator = null;
try {
generator = KeyGenerator.getInstance(algorithmName);
} catch (NoSuchAlgorithmException e) {
Assert.fail(e.getMessage());
}
generator.init(keySize);
Key key = generator.generateKey();
Cipher cipher = null;
try {
String transformation = algorithmName;
if (blockmode != null)
{
transformation += "/" + blockmode;
}
cipher = Cipher.getInstance(transformation);
} catch (NoSuchAlgorithmException e) {
Assert.fail(e.getMessage());
} catch (NoSuchPaddingException e) {
Assert.fail(e.getMessage());
}
try {
cipher.init(Cipher.ENCRYPT_MODE, key, parameters);
} catch (InvalidKeyException e) {
Assert.fail(e.getMessage());
} catch (InvalidAlgorithmParameterException e) {
Assert.fail(e.getMessage());
}
byte[] bs = null;
try {
bs = cipher.doFinal(plainData.getBytes());
} catch (IllegalBlockSizeException e) {
Assert.fail(e.getMessage());
} catch (BadPaddingException e) {
Assert.fail(e.getMessage());
}
try {
cipher.init(Cipher.DECRYPT_MODE, key, parameters);
} catch (InvalidKeyException e) {
Assert.fail(e.getMessage());
} catch (InvalidAlgorithmParameterException e) {
Assert.fail(e.getMessage());
}
byte[] decrypted = null;
try {
decrypted = cipher.doFinal(bs);
} catch (IllegalBlockSizeException e) {
Assert.fail(e.getMessage());
} catch (BadPaddingException e) {
Assert.fail(e.getMessage());
}
Assert.assertTrue(Arrays.equals(plainData.getBytes(), decrypted));
}
}
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