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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.InvalidKeyException;
import java.security.KeyPair;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.SignatureException;
import junit.framework.Assert;
public class SignatureHelper extends TestHelper<KeyPair> {
private final String algorithmName;
private final String plainData = "some data do sign and verify";
public SignatureHelper(String algorithmName) {
this.algorithmName = algorithmName;
}
@Override
public void test(KeyPair keyPair) {
test(keyPair.getPrivate(), keyPair.getPublic());
}
public void test(PrivateKey encryptKey, PublicKey decryptKey) {
Signature signature = null;
try {
signature = Signature.getInstance(algorithmName);
} catch (NoSuchAlgorithmException e) {
Assert.fail(e.getMessage());
}
try {
signature.initSign(encryptKey);
} catch (InvalidKeyException e) {
Assert.fail(e.getMessage());
}
try {
signature.update(plainData.getBytes());
} catch (SignatureException e) {
Assert.fail(e.getMessage());
}
byte[] signed = null;
try {
signed = signature.sign();
} catch (SignatureException e) {
Assert.fail(e.getMessage());
}
try {
signature.initVerify(decryptKey);
} catch (InvalidKeyException e) {
Assert.fail(e.getMessage());
}
try {
signature.update(plainData.getBytes());
} catch (SignatureException e) {
Assert.fail(e.getMessage());
}
try {
Assert.assertTrue("signature could not be verified", signature
.verify(signed));
} catch (SignatureException e) {
Assert.fail(e.getMessage());
}
}
}
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