com.scientiamobile.wurflcloud.utils.Base64 Maven / Gradle / Ivy
/**
* Copyright (c) 2015 ScientiaMobile Inc.
*
* The WURFL Cloud Client is intended to be used in both open-source and
* commercial environments. To allow its use in as many situations as possible,
* the WURFL Cloud Client is dual-licensed. You may choose to use the WURFL
* Cloud Client under either the GNU GENERAL PUBLIC LICENSE, Version 2.0, or
* the MIT License.
*
* Refer to the COPYING.txt file distributed with this package.
*/
package com.scientiamobile.wurflcloud.utils;
/**
* Date: 14/07/11
*
* @version $Id$
*/
public class Base64 {
private static final String base64code = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz" + "0123456789" + "+/";
private static final int splitLinesAt = 76;
public static byte[] zeroPad(int length, byte[] bytes) {
byte[] padded = new byte[length];
System.arraycopy(bytes, 0, padded, 0, bytes.length);
return padded;
}
public static String encode(String string) {
String encoded = "";
byte[] stringArray;
try {
stringArray = string.getBytes("UTF-8");
} catch (Exception ignored) {
stringArray = string.getBytes();
}
int paddingCount = (3 - (stringArray.length % 3)) % 3;
stringArray = zeroPad(stringArray.length + paddingCount, stringArray);
for (int i = 0; i < stringArray.length; i += 3) {
int j = ((stringArray[i] & 0xff) << 16) +
((stringArray[i + 1] & 0xff) << 8) +
(stringArray[i + 2] & 0xff);
encoded = encoded + base64code.charAt((j >> 18) & 0x3f) +
base64code.charAt((j >> 12) & 0x3f) +
base64code.charAt((j >> 6) & 0x3f) +
base64code.charAt(j & 0x3f);
}
return splitLines(encoded.substring(0, encoded.length() -
paddingCount) + "==".substring(0, paddingCount));
}
public static String splitLines(String string) {
String lines = "";
for (int i = 0; i < string.length(); i += splitLinesAt) {
lines += string.substring(i, Math.min(string.length(), i + splitLinesAt));
lines += "\r\n";
}
return lines;
}
public static void main(String[] args) {
for (int i = 0; i < args.length; i++) {
System.err.println("encoding \"" + args[i] + "\"");
System.out.println(encode(args[i]));
}
}
}