com.iiitd.qre.CreateZSignedQR.java Source code

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Here is the source code for com.iiitd.qre.CreateZSignedQR.java

Source

/*
 * Copyright 2013 Arjun Asthana
 * This file is part of qr-sign-java.
 *
 * qr-sign-java is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * qr-sign-java is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with qr-sign-java. If not, see http://www.gnu.org/licenses/.
 */

package com.iiitd.qre;

import java.awt.image.BufferedImage;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import javax.imageio.ImageIO;

import org.json.XML;

import sun.misc.BASE64Encoder;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.google.zxing.qrcode.encoder.ByteMatrix;
import com.google.zxing.qrcode.encoder.Encoder;
import com.google.zxing.qrcode.encoder.QRCode;

public class CreateZSignedQR extends Common {
    private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;

    public static void main(String args[]) throws Exception {
        if (args.length != 4)
            System.out.println("Usage: CreateZSignedQR <signer>" + " <privkey> <xml-file> <imgout>");
        else
            try {
                byte[] data = XML.toJSONObject(new String(Common.readFileContents(args[2]))).toString().getBytes();
                byte[] signature = Sign.sign(args[1], data);
                byte[] zdata = Common.gzip(data);

                BASE64Encoder benc64 = new BASE64Encoder();

                String content = args[0] + "|" + benc64.encode(zdata) + "|" + benc64.encode(signature);

                System.out.println(content);
                QRCode qrc = new QRCode();
                Encoder.encode(content, ErrorCorrectionLevel.L, qrc);

                writeToStream(qrc.getMatrix(), "PNG", new FileOutputStream(args[3]));
            } catch (Exception e) {
                System.err.println("Caught exception " + e.toString());
                throw e;
            }
    }

    public static BufferedImage toBufferedImage(ByteMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        int scale = 6;
        int margin = 3;
        BufferedImage image = new BufferedImage(scale * (width + 2 * margin), scale * (height + 2 * margin),
                BufferedImage.TYPE_INT_ARGB);

        int imgX, imgY = margin * scale;
        for (int y = 0; y < height; y++) {
            for (int i = 0; i < scale; ++i) {
                imgX = margin * scale;
                for (int x = 0; x < width; x++) {
                    for (int j = 0; j < scale; ++j) {
                        if (matrix.get(x, y) != 0)
                            image.setRGB(imgX, imgY, BLACK);
                        ++imgX;
                    }
                }
                ++imgY;
            }
        }
        return image;
    }

    public static void writeToStream(ByteMatrix matrix, String format, OutputStream stream) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        /*System.out.println("m: " + matrix + ", f: " + format + ", s: " + stream
        + ", i: " + image);*/
        ImageIO.write(image, format, stream);
    }
}