Android Base64 Decode decryptBase64Text(String key, String src)

Description

decrypt Base Text

Declaration

public static String decryptBase64Text(String key, String src)
            throws Exception 

Method Source Code

//package com.java2s;

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 encoding = "utf-8";
    private static byte[] iv = { 1, 2, 3, 4, 5, 6, 7, 8 };

    public static String decryptBase64Text(String key, String src)
            throws Exception {
        byte[] bytes = Base64.decode(src, Base64.DEFAULT);
        return decryptBytes(key, bytes);
    }/*w  w  w.  j  a  v  a 2s  .  co  m*/

    public static String decryptBytes(String key, byte[] src)
            throws Exception {
        byte[] bytes = decrypt(key.getBytes(), src);
        return new String(bytes, encoding);
    }

    private static byte[] decrypt(byte[] key, byte[] src) throws Exception {
        IvParameterSpec zeroIv = new IvParameterSpec(iv);
        SecretKeySpec spec = new SecretKeySpec(key, "DES");
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, spec, zeroIv);
        return cipher.doFinal(src);
    }
}

Related

1. base16decode(String base16Str)
2. base64Decode(final String text)
3. base64ToText(String stringInput)
4. from64(String a)
5. fromBase64(String encoded)