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Last active October 26, 2021 02:41
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Extract Certificate from Vaccination QR
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README.md

Getting my head around the QR codes in the International COVID-19 Vaccination Certificate. This will run in a ubuntu:20.04 container.

  • zbarimg decodes the QR
  • sed replaces out the non-json I don't want
  • jq gets the certificate from the json
  • tr convert from base64url to base64
  • openssl to dump the certificate
Raw
decode.sh
DEBIAN_FRONTEND=noninteractive apt-get install -y zbar-tools jq openssl
zbarimg /qr/qr.png 2>/dev/null | \
sed "s/QR-Code://" | \
jq -r .sig.cer | \
tr '_-' '/+' | \
base64 --decode | \
openssl x509 -inform der -text --noout
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