Java String Encrypt encrypt(byte[] plaintextBytes, int r, int n)

Description

encrypt

License

Apache License

Declaration

private static byte[] encrypt(byte[] plaintextBytes, int r, int n) 

Method Source Code

//package com.java2s;
/*/*from   ww  w .j a v  a  2  s  . co  m*/
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

public class Main {
    private static byte[] encrypt(byte[] plaintextBytes, int r, int n) {
        byte[] buffer = new byte[plaintextBytes.length + n];

        for (int i = 0; i < n; i++) {
            buffer[i] = 0;
        }

        System.arraycopy(plaintextBytes, 0, buffer, n, buffer.length - n);

        int c1 = 52845;
        int c2 = 22719;

        byte[] ciphertextBytes = new byte[buffer.length];

        for (int i = 0; i < buffer.length; i++) {
            int plain = buffer[i] & 0xff;
            int cipher = plain ^ r >> 8;

            ciphertextBytes[i] = (byte) cipher;

            r = (cipher + r) * c1 + c2 & 0xffff;
        }

        return ciphertextBytes;
    }
}

Related

1. encrypt(byte[] data)
2. encrypt(byte[] serialize)
3. encrypt(char ch)
4. encrypt(int original, int salt)
5. encrypt(String data, String key)