Xor Decode a String - Android java.lang

Android examples for java.lang:String Unicode

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Description

Xor Decode a String

Demo Code

/*/*  w  w  w  .j ava 2  s.co m*/
 *   Copyright (C)  2016 android@19code.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.
 */
//package com.java2s;

public class Main {
    public static String XorDecode(String str, String privateKey) {
        char[] snNum = new char[str.length() / 3];
        String result = "";

        for (int i = 0, j = 0; i < str.length() / 3; i++, j++) {
            if (j == privateKey.length())
                j = 0;
            int n = Integer.parseInt(str.substring(i * 3, i * 3 + 3));
            snNum[i] = (char) ((char) n ^ privateKey.charAt(j));
        }
        for (int k = 0; k < str.length() / 3; k++) {
            result += snNum[k];
        }
        return result;
    }
}

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