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Core services for Usergrid system.
/*******************************************************************************
* Copyright 2012 Apigee Corporation
*
* 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.usergrid.utils;
import static org.apache.commons.lang.StringUtils.rightPad;
import static org.apache.commons.lang.StringUtils.substring;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class AESUtils {
private static final Logger logger = LoggerFactory
.getLogger(AESUtils.class);
private static byte[] linebreak = {};
private static Cipher cipher;
private static Base64 coder;
static {
try {
cipher = Cipher.getInstance("AES/ECB/PKCS5Padding", "SunJCE");
coder = new Base64(32, linebreak, true);
} catch (Throwable t) {
logger.error("Cipher error", t);
}
}
public static synchronized String encrypt(String secret, String plainText) {
secret = substring(rightPad(secret, 16), 0, 16);
SecretKey key = new SecretKeySpec(secret.getBytes(), "AES");
try {
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] cipherText = cipher.doFinal(plainText.getBytes());
return new String(coder.encode(cipherText));
} catch (Exception e) {
logger.error("Encryption error", e);
}
return null;
}
public static synchronized String decrypt(String secret, String codedText) {
secret = substring(rightPad(secret, 16), 0, 16);
SecretKey key = new SecretKeySpec(secret.getBytes(), "AES");
byte[] encypted = coder.decode(codedText.getBytes());
try {
cipher.init(Cipher.DECRYPT_MODE, key);
byte[] decrypted = cipher.doFinal(encypted);
return new String(decrypted);
} catch (Exception e) {
logger.error("Decryption error", e);
}
return null;
}
}