Android AES Decrypt decryptedData(String userkey, String encryptedData)

Description

decrypted Data

Declaration

public static String decryptedData(String userkey, String encryptedData) 

Method Source Code

//package com.java2s;
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

public class Main {
    private static final String APP_KEY = "yourName";
    private static final String ENCODING = "ISO-8859-1";

    public static String decryptedData(String userkey, String encryptedData) {
        String decryptedUserData = "";
        try {//from  ww  w . ja v a  2 s  .c om
            String key = getAppPassCode(userkey);
            // Create key and cipher
            Key aesKey = new SecretKeySpec(key.getBytes(), "AES");
            Cipher cipher = Cipher.getInstance("AES");
            // decrypt the text
            cipher.init(Cipher.DECRYPT_MODE, aesKey);
            byte[] userData = cipher.doFinal(encryptedData
                    .getBytes(ENCODING));
            decryptedUserData = new String(userData);

        } catch (Exception e) {
            e.printStackTrace();
        }
        return decryptedUserData;
    }

    private static String getAppPassCode(String userPassCode) {
        String appPassCode = userPassCode;
        if (userPassCode.length() < 16) {
            appPassCode = appPassCode
                    + APP_KEY.substring(0,
                            (APP_KEY.length() - userPassCode.length()));
        }
        return appPassCode;
    }
}

Related

1. decrypt(byte[] raw, byte[] encrypted)
2. decrypt(Context context, String encrypted)
3. decrypt(Context context, String encrypted)
4. decode(String seed, String encrypted)
5. decrypt(byte[] raw, byte[] encrypted)
6. decryptedPassword(String key, String encryptedData)