ZXing ("Zebra Crossing") barcode scanning library for Java, Android

I create an Aztec code with the content "abc" and have the encoding hints set to AZTEC_LAYERS=5, ERROR_CORRECTION=33, CHARACTER_SET=UTF8 . In the release 3.4.1 everything is ok, I can use a Scanner-App and get the expected result "abc". In the release 3.5.1 the generated BitmapMatrix and therefore the Aztec code looks different. When I scan it with the same scanner I get the result "HCM QN". Here is the method call:

AztecWriter().encode(
        "abc",
        BarcodeFormat.AZTEC,
        width,
        height,
        hints"

I am using the code/library in an Android app with Java.

Did something change in the default settings? Do you have similar observations?

Important: This also changes the default decoding behavior of the qr-code decoder for the case that KANJI mode data is encountered which is preceded by an ECI with a value different than 20 (Shift-JIS). In this case the data in interpreted in the encoding of the ECI and not as Shift-JIS.

Hi .

Using jazzer, the following exception has been occurred :

Java Exception: java.lang.IllegalStateException: Failed to recover .

The produced jazzer file is as :

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class Crash_554492f3abaea0e383717bff996d44d0cdb12f5f {
    static final String base64Bytes = "rO0ABXNyABNqYXZhLnV0aWwuQXJyYXlMaXN0eIHSHZnHYZ0DAAFJAARzaXpleHAAAAADdwQAAAADc3IAEWphdmEubGFuZy5JbnRlZ2VyEuKgpPeBhzgCAAFJAAV2YWx1ZXhyABBqYXZhLmxhbmcuTnVtYmVyhqyVHQuU4IsCAAB4cAAAAG5zcQB+AAIAAACAdAAAeA==";

    public static void main(String[] args) {
        ClassLoader.getSystemClassLoader().setDefaultAssertionStatus(true);
        try {
            Method fuzzerInitialize = MultiFormatEncodeFuzzer.class.getMethod("fuzzerInitialize");
            fuzzerInitialize.invoke(null);
        } catch (NoSuchMethodException ignored) {
            try {
                Method fuzzerInitialize = MultiFormatEncodeFuzzer.class.getMethod("fuzzerInitialize", String[].class);
                fuzzerInitialize.invoke(null, (Object) args);
            } catch (NoSuchMethodException ignored) {
            } catch (IllegalAccessException | InvocationTargetException e) {
                e.printStackTrace();
                System.exit(1);
            }
        } catch (IllegalAccessException | InvocationTargetException e) {
            e.printStackTrace();
            System.exit(1);
        }
        com.code_intelligence.jazzer.api.CannedFuzzedDataProvider input = new com.code_intelligence.jazzer.api.CannedFuzzedDataProvider(base64Bytes);
        MultiFormatEncodeFuzzer.fuzzerTestOneInput(input);
    }
}

And the corpus required to reproduce (Please first unzip it) :

crash-corpus.zip

To reproduce :

./MultiFormatEncodeFuzzer [crashing-corpus] Thanks!

Hi,

First, thanks for this great library. I'm just using the Reed Solomon part of it and I stumbled on I think a corner-case bug.

When using data+error_codes of size 256, if I corrupt the first byte (after ReedSolomon encoding), neither the byte is "repaired" nor an exception is thrown when decoding. It doesn't seem to matter how many error_codes I use or the data content, but it only fails for data+error_codes of size 256.

I grep'd the ReedSolomon code for literals 255 and 256 but saw nothing fishy.

Hmm, code formatter on this wiki not working for me. JUnit test below. Depends on RSEncoderDecoder class, which looks fine by inspection (attached as '.txt') RSEncoderDecoder.txt

import java.util.Arrays; import org.junit.Test; import com.casualcoding.reedsolomon.RSEncoderDecoder; public class ReedSolomonByte0Bug { @Test public void testRSStreamAllZeros() throws Exception { /* * numEcBytes doesn't seem to matter */ int numEcBytes = 8;

    for (int totalBlockSizeBytes = 10; totalBlockSizeBytes <= 256; totalBlockSizeBytes++)
    {

        byte[] mesg = new byte[totalBlockSizeBytes - numEcBytes];

        for (int i = 0; i < mesg.length; i++)
        {
            mesg[i] = (byte) i;
        }

        RSEncoderDecoder rs = new RSEncoderDecoder();
        byte[] rsmesg = rs.encodeData(mesg, numEcBytes);

        /*
         * Corrupt byte 0.  Corrupting other bytes works correctly
         */
        rsmesg[0] = (byte) (rsmesg[0] + 1);

        // No exception thrown ...
        byte[] testDecode = rs.decodeData(rsmesg, numEcBytes);

        /*
         * Fails for totalBlockSize = 256
         */
        if (Arrays.equals(mesg, testDecode) == false)
        {
            System.out.println("Failed: totalBlockSizeBytes = " + totalBlockSizeBytes);
        }
    }
}

}

CommandLineEncoder appears to ignore the height and width parameters when barcode_format is DATA_MATRIX

The following command produces a 14px by 14px image instead of a 500px by 500px image:

java -cp javase/target/javase-3.3.0-jar-with-dependencies.jar com.google.zxing.client.j2se.CommandLineEncoder --barcode_format DATA_MATRIX --height 500 --width 500 abcdefg

Here's a Dockerfile to reproduce this issue:

FROM ubuntu:16.04
RUN apt-get update && apt-get install -y --no-install-recommends default-jdk git maven
RUN git clone --depth 1 --branch zxing-3.3.0 https://github.com/zxing/zxing.git
RUN cd zxing && mvn install -DskipTests
RUN cd zxing/javase && mvn -DskipTests package assembly:single
RUN cd zxing && java -cp javase/target/javase-3.3.0-jar-with-dependencies.jar com.google.zxing.client.j2se.CommandLineEncoder --barcode_format DATA_MATRIX --height 500 --width 500 abcdefg

Is this a bug or am I using CommandLineEncoder wrong?

Hello, I generated a QR code from the following whole-data-events in ics format.

Bug

• The current Zxing Barcode Scanner on Android detects only the first event (20151012)
• but fails to detect/decode the further events.

BEGIN:VCALENDAR
PRODID:Leave Planner Version 201512041000
COMMENT:5 day/s exported on 20151204
VERSION:2.0
BEGIN:VEVENT
SUMMARY:XLEAVE
DTSTART;VALUE=DATE:20151012
END:VEVENT
BEGIN:VEVENT
SUMMARY:XLEAVE
DTSTART;VALUE=DATE:20151013
END:VEVENT
BEGIN:VEVENT
SUMMARY:XLEAVE
DTSTART;VALUE=DATE:20151014
END:VEVENT
BEGIN:VEVENT
SUMMARY:XLEAVE
DTSTART;VALUE=DATE:20151015
END:VEVENT
BEGIN:VEVENT
SUMMARY:XLEAVE
DTSTART;VALUE=DATE:20151016
END:VEVENT
END:VCALENDAR

here's the code to generate with your online web side:

https://zxing.org/w/chart?cht=qr&chs=350x350&chld=L&choe=UTF-8&chl=BEGIN%3AVCALENDAR%0APRODID%3ALeave+Planner+Version+201512041000%0ACOMMENT%3A5+day%2Fs+exported+on+20151204%0AVERSION%3A2.0%0ABEGIN%3AVEVENT%0ASUMMARY%3AXLEAVE%0ADTSTART%3BVALUE%3DDATE%3A20151012%0AEND%3AVEVENT%0ABEGIN%3AVEVENT%0ASUMMARY%3AXLEAVE%0ADTSTART%3BVALUE%3DDATE%3A20151013%0AEND%3AVEVENT%0ABEGIN%3AVEVENT%0ASUMMARY%3AXLEAVE%0ADTSTART%3BVALUE%3DDATE%3A20151014%0AEND%3AVEVENT%0ABEGIN%3AVEVENT%0ASUMMARY%3AXLEAVE%0ADTSTART%3BVALUE%3DDATE%3A20151015%0AEND%3AVEVENT%0ABEGIN%3AVEVENT%0ASUMMARY%3AXLEAVE%0ADTSTART%3BVALUE%3DDATE%3A20151016%0AEND%3AVEVENT%0AEND%3AVCALENDAR%0A