Decode the contents of the Ontario Proof of Vaccination (the "Smart Health Card QR Code")
Output
This is from my QR code, hopefully fully redacted although I suspect it tells you what kind of doses I got.
{
"iss": "https://prd.pkey.dhdp.ontariohealth.ca",
"nbf": 1634342670.448,
"vc": {
"type": [
"https://smarthealth.cards#health-card",
"https://smarthealth.cards#immunization",
"https://smarthealth.cards#covid19"
],
"credentialSubject": {
"fhirVersion": "4.0.1",
"fhirBundle": {
"resourceType": "Bundle",
"type": "collection",
"entry": [
{
"fullUrl": "resource:0",
"resource": {
"resourceType": "Patient",
"name": [
{
"family": "FAMILY NAME",
"given": [
"FIRST NAME",
"MIDDLE NAMES"
]
}
],
"birthDate": "YYYY-MM-DD"
}
},
{
"fullUrl": "resource:1",
"resource": {
"resourceType": "Immunization",
"meta": {
"security": [
{
"system": "https://smarthealth.cards/ial",
"code": "IAL1.4"
}
]
},
"status": "completed",
"manufacturer": {
"identifier": {
"system": "http://hl7.org/fhir/sid/mvx",
"value": "MOD"
}
},
"vaccineCode": {
"coding": [
{
"system": "http://hl7.org/fhir/sid/cvx",
"code": "207"
},
{
"system": "http://snomed.info/sct",
"code": "28571000087109"
}
]
},
"occurrenceDateTime": "YYYY-MM-DD",
"lotNumber": "DDDDDDD",
"patient": {
"reference": "resource:0"
},
"performer": [
{
"actor": {
"display": "ON, Canada"
}
}
]
}
},
{
"fullUrl": "resource:2",
"resource": {
"resourceType": "Immunization",
"meta": {
"security": [
{
"system": "https://smarthealth.cards/ial",
"code": "IAL1.4"
}
]
},
"status": "completed",
"manufacturer": {
"identifier": {
"system": "http://hl7.org/fhir/sid/mvx",
"value": "MOD"
}
},
"vaccineCode": {
"coding": [
{
"system": "http://hl7.org/fhir/sid/cvx",
"code": "207"
},
{
"system": "http://snomed.info/sct",
"code": "28571000087109"
}
]
},
"occurrenceDateTime": "YYYY-MM-DD",
"lotNumber": "DDDDDDD",
"patient": {
"reference": "resource:0"
},
"performer": [
{
"actor": {
"display": "ON, Canada"
}
}
]
}
}
]
}
}
}
}
Setup
This runs in python3. I strongly suggest you set up a virtualenv before installing any python packages. Check one of these guides:
- https://realpython.com/python-virtual-environments-a-primer/
- https://docs.python-guide.org/dev/virtualenvs/
- https://towardsdatascience.com/virtual-environments-for-absolute-beginners-what-is-it-and-how-to-create-one-examples-a48da8982d4b
(If you're new to python, I appologize for the mess that is package management in python)
We need a JWT library, PyJWT seems to be the top python library. Sadly it doesn't support the body being compressed as happens with SHC. Thankfully, someone has created a fix for this, but it hasn't merged yet. https://github.com/jpadilla/pyjwt/pull/666
pip install 'git+https://github.com/Roguelazer/[email protected]#egg=pyjwt[crypto]'
OR
pip install -r requirements.txt
TODO
- verify signature, not sure where the
.well-known/jwjks.jsonis for Ontario - read in the PDF or an image with a QR Code?
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