Android AES Decrypt decrypt(String src)

Description

decrypt

License

Apache License

Declaration

public static String decrypt(String src) throws Exception 

Method Source Code

//package com.java2s;
/*//ww w .j av a2  s  .  com
 * Copyright (C) 2012 A3like zaze8736@163.com
 *
 * 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.
 */

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import android.util.Base64;

public class Main {
    private final static String DEFAULT_KEY = "ITAG_KEY_MANAGER";
    private final static byte[] iv = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 'A', 'B',
            'C', 'D', 'E', 'F', 0 };

    public static String decrypt(String src) throws Exception {
        return decrypt(DEFAULT_KEY, src);
    }

    public static String decrypt(String key, String src) throws Exception {
        byte[] keyByte = key.getBytes();
        SecretKeySpec keySpec = new SecretKeySpec(keyByte, "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        IvParameterSpec ivSpec = new IvParameterSpec(iv);
        cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
        byte[] srcByte = Base64.decode(src, Base64.DEFAULT);
        byte[] decrypted = cipher.doFinal(srcByte);
        String result = new String(decrypted);
        return result;
    }
}

Related

1. decrypt(String key, String src)
2. decrypt(String seed, String encrypted)
3. decrypt(String seed, String encrypted)
4. decrypt(String seed, String encrypted)
5. decrypt(String src)
6. decrypt(byte[] content, String key)
7. decrypt(byte[] content, String password)
8. decrypt(byte[] content, String password)
9. decrypt(byte[] content, String password)