juneau-core/juneau-config/src/main/java/org/apache/juneau/ini/XorEncoder.java

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package org.apache.juneau.ini;

import static org.apache.juneau.internal.StringUtils.*;
import static org.apache.juneau.internal.IOUtils.*;

/**
 * Simply XOR+Base64 encoder for obscuring passwords and other sensitive data in INI config files.
 *
 * <p>
 * This is not intended to be used as strong encryption.
 */
public final class XorEncoder implements Encoder {

	/** Reusable XOR-Encoder instance. */
	public static final XorEncoder INSTANCE = new XorEncoder();

	private static final String key = System.getProperty("org.apache.juneau.ini.XorEncoder.key",
		"nuy7og796Vh6G9O6bG230SHK0cc8QYkH");	// The super-duper-secret key

	@Override /* Encoder */
	public String encode(String fieldName, String in) {
		byte[] b = in.getBytes(UTF8);
		for (int i = 0; i < b.length; i++) {
				int j = i % key.length();
			b[i] = (byte)(b[i] ^ key.charAt(j));
		}
		return base64Encode(b);
	}

	@Override /* Encoder */
	public String decode(String fieldName, String in) {
		byte[] b = base64Decode(in);
		for (int i = 0; i < b.length; i++) {
			int j = i % key.length();
			b[i] = (byte)(b[i] ^ key.charAt(j));
	}
		return new String(b, UTF8);
	}
}