Programming

Tuesday 27 September 2016, 10:19  #1
Programming - Quick Response Code
Anonymous

"Decode the image and submit the flag in less than 6 seconds."

What kind of a flag am I suppose to submit? I decode the image in less than 1 second and submit the text the same way I did in the "CAPTCHA me if you can" challenge. However, I get the new page with the new image and the sentence: "Missed, retry your chance."

Is there a catch somewhere that I cannot see? The decoded text does not seem to be encoded with anything and looks legitimate.

Regards.

Tuesday 27 September 2016, 13:27  #2
Programming - Quick Response Code
Anonymous

Never mind. 10 minutes later I did it. "It’s always the darkest under the lighthouse". The key is the flag :)

Friday 4 November 2016, 17:15  #3
Programming - Quick Response Code
Julia Terbrack
  • 1 posts

Hi!
I have difficulties decoding the QR (after adding finder patterns). Decoding with my android barcode scanner is no problem, but zbar and zxing fail, any suggestions?

Thursday 26 January 2017, 07:46  #4
Programming - Quick Response Code
zenith
  • 1 posts

hi, i have the same problem here. but after a while, i realize that something missing. the square spot at the corner
i already draw by myself, but still can’t decode it.
can you help me? thx

Tuesday 17 July 2018, 13:56  #5
Programming - Quick Response Code
Zer0l1ng
  • 7 posts

@Julia Terbrack
i guess u use the zxing ? right ?
Suggestion:
upgrade the core.jar from 2.2->2.3

Tuesday 9 October 2018, 12:38  #6
Programming - Quick Response Code
Farsx
  • 3 posts

Did someone try to use ZBAR instead of ZXING? It seems ZBAR doesn’t recognize the it as a QR code...

Tuesday 9 October 2018, 13:41  #7
Programming - Quick Response Code
Th1b4ud
  • 1636 posts

Maybe because something is missing...

Tuesday 9 October 2018, 14:31  #8
Programming - Quick Response Code
Farsx
  • 3 posts

Uhmm I don’t think so... I added the missing position patterns! Or is something else missing??
Anyway, ZXIMG is working fine.

Wednesday 22 May 2019, 17:25  #9
Programming - Quick Response Code
ovsstx
  • 9 posts

Create an random QR code online !

Then look at this one :!

There is something missing !

If you put this, every library is able to read the QRcode !

Sunday 27 December 2020, 23:36  #10
Programming - Quick Response Code

How do you fix the QRcode from the base64 string? I tried comparing the provided base64 string and the base64 of an "only corners" QRcode image, but I don’t know if this is the good way...I imagine that the base64 string needs to have a particular order to reconstruct the QRcode image. Is there another way to do it?