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Questions tagged [base45]

9 questions
8
votes
4 answers

Decode base45 string

We are trying to implement the verification of the new EU corona virus test/vaccination certificates, but can't get the base45 decoding working. Specification is here: https://datatracker.ietf.org/doc/draft-faltstrom-base45/ We nearly finished our…
BvuRVKyUVlViVIc7
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1 answer

How to verify EU COVID Vaccine QRCode Signature in Java?

Is there anyway to verify the signature of the EU Covid Vaccine QR Code and make sure the QR Code was issued by an authorized entity?
MA1
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2
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2 answers

Base45 - Uncaught ReferenceError: Buffer is not defined (React JS)

Good day. I have app created via create-react-app and I am trying to create decoder for covid greenpass. I have an issue with base45 decoding. It causes error like this: base45-js.js:60 Uncaught ReferenceError: Buffer is not defined at…
szemeg
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1 answer

Decode and encode in Base45 in Java

I am following with great interest the digital covid certificate project in java: https://github.com/ehn-dcc-development/ More specifically, for Java and to decode the pass: https://github.com/GaetanoPiazzolla/greenpass-decode Using this code, to…
Guillaume
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1 answer

Decoding covid TESTING certificate in Python - invalid base45 string

Thank you for your help. With the following sample script, I can successfully decode a (a) covid VACCINATION bar code and pass on the json to my application (I've tested this with the bar codes in my "green pass" application and this…
awensch
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1 answer

Decode EU covid passport with nodejs

I wanted to try to decode my EU covid passport, and found these instructions for python. I was trying to do it in nodejs which I am more familiar with There is a 3 stage process decode Base 45 decompress extract cose data I have the code below,…
Simon H
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Base45 encoding

I recently have taken up interest in qr codes and first learned of base45 encoding and CBOR. I have a code snippet below, what I am wondering is if there is a way to actually reverse so that you could write a json object or change the name and…
dbzx10299
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1 answer

reverse decoding base45

There is a program that decodes a text in python. I would like that same method to be used to encode the output tekst. The code is a decoding tool. so I thought if you use the code the other way around you can encode it. But since I don't understand…
MitchGamesNL
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Python zlib compression & decompression

I have a base45 decoded string that I successfully decompress with output = zlib.decompress(string), where string…
TikTokExperience
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