Added JS version
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GG
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#!/usr/bin/env node
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//
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// Author: Guillaume Gagnon
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// Licence: Apache 2.0
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//
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// Extract all payloads included in the Covid QR provided by the Quebec government (Preuve/passeport de vaccination)
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// Note: The public key do not seems to be provided by the government at this point.
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// Hence, it is not possible to validate QR authenticity at the time being.
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// Public keys should be available here later on:
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// https://covid19.quebec.ca/PreuveVaccinaleApi/issuer/.well-known/jwks.json
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// This script has been built using this very nice and detailed HOWTO:
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// https://github.com/dvci/health-cards-walkthrough/blob/main/SMART%20Health%20Cards.ipynb
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//
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// Also, more info about the SMART Health Cards Framework can be found here:
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// https://smarthealth.cards/
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const fs = require('fs');
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var jsQR = require('jsqr');
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var PNG = require('pngjs').PNG;
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var jose = require('node-jose');
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var base64url = require("base64url");
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var zlib = require("zlib");
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// Extract RAW QR from picture
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imageData = PNG.sync.read(fs.readFileSync('./QR.png'))
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const scannedQR = jsQR(new Uint8ClampedArray(imageData.data.buffer), imageData.width, imageData.height)
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console.log("RAW QR DATA:")
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console.log(scannedQR.data)
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console.log("")
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// Extract JWS
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const scannedJWS = scannedQR
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.chunks
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.filter(chunk => chunk.type === "numeric")[0] // Grab the numeric chunk
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.text.match(/(..?)/g) // Split into groups of 2 numeric characters each of which represent a single JWS char
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.map(num => String.fromCharCode(parseInt(num, 10) + 45)).join('') // Convert from numeric encoding to JWS
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console.log("JWS DATA:")
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console.log(scannedJWS)
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console.log("")
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// Extract JWS Header
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JWSHeaders = base64url.decode(scannedJWS.split(".")[0])
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console.log("JWS HEAD:")
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console.log(JWSHeaders)
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console.log("")
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// Extract payload
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JWSPayload = scannedJWS.split(".")[1]
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const payload = Buffer.from(JWSPayload, "base64");
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zlib.inflateRaw(payload, function (err, decompressedResult) {
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scannedResult = decompressedResult.toString("utf8");
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console.log(scannedResult)
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//const entries = JSON.parse(scannedResult) // Uncomment this bloc if you want to "beautify" the json output
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// .vc.credentialSubject.fhirBundle.entry
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// .map(entry => console.log(JSON.stringify(entry, null, 2)))
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});
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{
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"name": "covid-qr-decode",
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"version": "1.0.0",
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"lockfileVersion": 1,
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"requires": true,
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"dependencies": {
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"base64-js": {
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"version": "1.5.1",
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"resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
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"integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA=="
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},
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"base64url": {
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"version": "3.0.1",
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"resolved": "https://registry.npmjs.org/base64url/-/base64url-3.0.1.tgz",
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"integrity": "sha512-ir1UPr3dkwexU7FdV8qBBbNDRUhMmIekYMFZfi+C/sLNnRESKPl23nB9b2pltqfOQNnGzsDdId90AEtG5tCx4A=="
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},
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"buffer": {
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"version": "5.7.1",
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"resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
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"integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
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"requires": {
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"base64-js": "^1.3.1",
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"ieee754": "^1.1.13"
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}
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},
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"es6-promise": {
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"version": "4.2.8",
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"resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.8.tgz",
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"integrity": "sha512-HJDGx5daxeIvxdBxvG2cb9g4tEvwIk3i8+nhX0yGrYmZUzbkdg8QbDevheDB8gd0//uPj4c1EQua8Q+MViT0/w=="
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},
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"ieee754": {
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"version": "1.2.1",
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"resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
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"integrity": "sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA=="
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},
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"jsqr": {
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"version": "1.4.0",
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"resolved": "https://registry.npmjs.org/jsqr/-/jsqr-1.4.0.tgz",
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"integrity": "sha512-dxLob7q65Xg2DvstYkRpkYtmKm2sPJ9oFhrhmudT1dZvNFFTlroai3AWSpLey/w5vMcLBXRgOJsbXpdN9HzU/A=="
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},
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"lodash": {
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"version": "4.17.21",
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"resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
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"integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
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},
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"long": {
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"version": "4.0.0",
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"resolved": "https://registry.npmjs.org/long/-/long-4.0.0.tgz",
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"integrity": "sha512-XsP+KhQif4bjX1kbuSiySJFNAehNxgLb6hPRGJ9QsUr8ajHkuXGdrHmFUTUUXhDwVX2R5bY4JNZEwbUiMhV+MA=="
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},
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"node-forge": {
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"version": "0.10.0",
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"resolved": "https://registry.npmjs.org/node-forge/-/node-forge-0.10.0.tgz",
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"integrity": "sha512-PPmu8eEeG9saEUvI97fm4OYxXVB6bFvyNTyiUOBichBpFG8A1Ljw3bY62+5oOjDEMHRnd0Y7HQ+x7uzxOzC6JA=="
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},
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"node-jose": {
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"version": "2.0.0",
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"resolved": "https://registry.npmjs.org/node-jose/-/node-jose-2.0.0.tgz",
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"integrity": "sha512-j8zoFze1gijl8+DK/dSXXqX7+o2lMYv1XS+ptnXgGV/eloQaqq1YjNtieepbKs9jBS4WTnMOqyKSaQuunJzx0A==",
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"requires": {
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"base64url": "^3.0.1",
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"buffer": "^5.5.0",
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"es6-promise": "^4.2.8",
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"lodash": "^4.17.15",
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"long": "^4.0.0",
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"node-forge": "^0.10.0",
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"pako": "^1.0.11",
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"process": "^0.11.10",
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"uuid": "^3.3.3"
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}
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},
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"pako": {
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"version": "1.0.11",
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"resolved": "https://registry.npmjs.org/pako/-/pako-1.0.11.tgz",
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"integrity": "sha512-4hLB8Py4zZce5s4yd9XzopqwVv/yGNhV1Bl8NTmCq1763HeK2+EwVTv+leGeL13Dnh2wfbqowVPXCIO0z4taYw=="
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},
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"pngjs": {
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"version": "6.0.0",
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"resolved": "https://registry.npmjs.org/pngjs/-/pngjs-6.0.0.tgz",
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"integrity": "sha512-TRzzuFRRmEoSW/p1KVAmiOgPco2Irlah+bGFCeNfJXxxYGwSw7YwAOAcd7X28K/m5bjBWKsC29KyoMfHbypayg=="
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},
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"process": {
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"version": "0.11.10",
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"resolved": "https://registry.npmjs.org/process/-/process-0.11.10.tgz",
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"integrity": "sha1-czIwDoQBYb2j5podHZGn1LwW8YI="
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},
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"uuid": {
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"version": "3.4.0",
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"resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
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"integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A=="
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},
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"zlib": {
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"version": "1.0.5",
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"resolved": "https://registry.npmjs.org/zlib/-/zlib-1.0.5.tgz",
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"integrity": "sha1-bnyXL8NxxkWmr7A6sUdp3vEU/MA="
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}
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}
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}
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@ -0,0 +1,22 @@
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{
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"name": "covid-qr-decode",
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"version": "1.0.0",
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"description": "",
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"main": "covid-qr-decode.js",
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"scripts": {
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"test": "echo \"Error: no test specified\" && exit 1"
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},
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"keywords": [],
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"author": "Guillaume Gagnon",
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"license": "Apache-2.0",
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"bin": {
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"hello": "./covid-qr-decode.js"
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},
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"dependencies": {
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"base64url": "^3.0.1",
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"jsqr": "^1.4.0",
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"node-jose": "^2.0.0",
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"pngjs": "^6.0.0",
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"zlib": "^1.0.5"
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}
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}
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