001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2026 jPOS Software SRL
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jpos.q2.cli;
020
021import org.jpos.iso.ISOUtil;
022import org.jpos.q2.CLICommand;
023import org.jpos.q2.CLIContext;
024import org.jpos.security.SystemSeed;
025
026import java.nio.ByteBuffer;
027import java.security.SecureRandom;
028import java.util.Base64;
029
030/**
031 * Obfuscate a secret
032 */
033public class OBF implements CLICommand {
034    @Override
035    public void exec(CLIContext cli, String[] args) throws Exception {
036        if (args.length != 2) {
037            usage(cli);
038            return;
039        }
040        cli.println (String.format("obf::%s", obf(args[1])));
041    }
042    public void usage(CLIContext cli) {
043        cli.println("Usage: obf \"secret\"");
044    }
045
046    private String obf(String s) {
047        SecureRandom sr = new SecureRandom();
048        byte[] b = s.getBytes();
049        byte[] e = new byte[Math.abs(sr.nextInt()) % 32];
050        int i = Math.abs(sr.nextInt());
051        sr.nextBytes(e);
052        b = ISOUtil.xor(b, SystemSeed.getSeed(i, b.length));
053        ByteBuffer buf = ByteBuffer.allocate(b.length + e.length + 8);
054        buf.putInt(i);
055        buf.putInt(b.length);
056        buf.put(b);
057        buf.put(e);
058        return Base64.getEncoder().encodeToString(buf.array());
059    }
060}