/*
* Copyright 2011-2016 the original author or authors.
*
* 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 org.springframework.security.crypto.encrypt;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import org.junit.Assume;
import org.junit.AssumptionViolatedException;
import org.springframework.security.crypto.encrypt.AesBytesEncryptor.CipherAlgorithm;
public class CryptoAssumptions {
public static void assumeGCMJCE() {
assumeAes256(CipherAlgorithm.GCM);
}
public static void assumeCBCJCE() {
assumeAes256(CipherAlgorithm.CBC);
}
private static void assumeAes256(CipherAlgorithm cipherAlgorithm) {
boolean aes256Available = false;
try {
Cipher.getInstance(cipherAlgorithm.toString());
aes256Available = Cipher.getMaxAllowedKeyLength("AES") >= 256;
}
catch (NoSuchAlgorithmException e) {
throw new AssumptionViolatedException(
cipherAlgorithm + " not available, skipping test", e);
}
catch (NoSuchPaddingException e) {
throw new AssumptionViolatedException(
cipherAlgorithm + " padding not available, skipping test", e);
}
Assume.assumeTrue(
"AES key length of 256 not allowed, skipping test",
aes256Available);
}
}