Added JS version

CovidQR-JS/covid-qr-decode.js

@@ -0,0 +1,62 @@
+#!/usr/bin/env node
+// 
+// Author: Guillaume Gagnon
+// Licence: Apache 2.0
+//
+// Extract all payloads included in the Covid QR provided by the Quebec government (Preuve/passeport de vaccination)
+// Note: The public key do not seems to be provided by the government at this point.
+//       Hence, it is not possible to validate QR authenticity at the time being.
+//       Public keys should be available here later on:
+//       https://covid19.quebec.ca/PreuveVaccinaleApi/issuer/.well-known/jwks.json
+
+// This script has been built using this very nice and detailed HOWTO:
+// https://github.com/dvci/health-cards-walkthrough/blob/main/SMART%20Health%20Cards.ipynb
+//
+// Also, more info about the SMART Health Cards Framework can be found here:
+// https://smarthealth.cards/
+
+
+const fs = require('fs');
+var jsQR = require('jsqr');
+var PNG = require('pngjs').PNG;
+var jose = require('node-jose');
+var base64url = require("base64url");
+var zlib = require("zlib");
+
+
+// Extract RAW QR from picture
+imageData = PNG.sync.read(fs.readFileSync('./QR.png'))
+const scannedQR = jsQR(new Uint8ClampedArray(imageData.data.buffer), imageData.width, imageData.height)
+console.log("RAW QR DATA:")
+console.log(scannedQR.data)
+console.log("")
+
+
+// Extract JWS
+const scannedJWS = scannedQR
+    .chunks
+    .filter(chunk => chunk.type === "numeric")[0] // Grab the numeric chunk
+    .text.match(/(..?)/g) // Split into groups of 2 numeric characters each of which represent a single JWS char
+    .map(num => String.fromCharCode(parseInt(num, 10) + 45)).join('') // Convert from numeric encoding to JWS
+console.log("JWS DATA:")
+console.log(scannedJWS)
+console.log("")
+
+
+// Extract JWS Header
+JWSHeaders = base64url.decode(scannedJWS.split(".")[0])
+console.log("JWS HEAD:")
+console.log(JWSHeaders)
+console.log("")
+
+
+// Extract payload
+JWSPayload = scannedJWS.split(".")[1]
+const payload = Buffer.from(JWSPayload, "base64");
+zlib.inflateRaw(payload, function (err, decompressedResult) {
+    scannedResult = decompressedResult.toString("utf8");
+    console.log(scannedResult)
+    //const entries = JSON.parse(scannedResult) // Uncomment this bloc if you want to "beautify" the json output
+    //    .vc.credentialSubject.fhirBundle.entry
+    //    .map(entry => console.log(JSON.stringify(entry, null, 2)))
+});

CovidQR-JS/package-lock.json

@@ -0,0 +1,98 @@
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+  "name": "covid-qr-decode",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
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+        "process": "^0.11.10",
+        "uuid": "^3.3.3"
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+}

CovidQR-JS/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "covid-qr-decode",
+  "version": "1.0.0",
+  "description": "",
+  "main": "covid-qr-decode.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "Guillaume Gagnon",
+  "license": "Apache-2.0",
+  "bin": {
+    "hello": "./covid-qr-decode.js"
+  },
+  "dependencies": {
+    "base64url": "^3.0.1",
+    "jsqr": "^1.4.0",
+    "node-jose": "^2.0.0",
+    "pngjs": "^6.0.0",
+    "zlib": "^1.0.5"
+  }
+}