org.apache.cxf.io.CipherPair Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.cxf.io;
import java.security.GeneralSecurityException;
import java.security.Key;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.IvParameterSpec;
/**
* A class to hold a pair of encryption and decryption ciphers.
*/
public class CipherPair {
private String transformation;
private Key key;
private byte[] ivp;
public CipherPair(String transformation) throws GeneralSecurityException {
this.transformation = transformation;
int d = transformation.indexOf('/');
String a;
if (d > 0) {
a = transformation.substring(0, d);
} else {
a = transformation;
}
Cipher enccipher = null;
try {
KeyGenerator keygen = KeyGenerator.getInstance(a);
keygen.init(new SecureRandom());
key = keygen.generateKey();
enccipher = Cipher.getInstance(transformation);
enccipher.init(Cipher.ENCRYPT_MODE, key);
ivp = enccipher.getIV();
} catch (GeneralSecurityException e) {
enccipher = null;
throw e;
}
}
public String getTransformation() {
return transformation;
}
public Cipher getEncryptor() {
Cipher enccipher = null;
try {
enccipher = Cipher.getInstance(transformation);
enccipher.init(Cipher.ENCRYPT_MODE, key);
} catch (GeneralSecurityException e) {
// ignore
}
return enccipher;
}
public Cipher getDecryptor() {
Cipher deccipher = null;
try {
deccipher = Cipher.getInstance(transformation);
deccipher.init(Cipher.DECRYPT_MODE, key, ivp == null ? null : new IvParameterSpec(ivp));
} catch (GeneralSecurityException e) {
// ignore
}
return deccipher;
}
}