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Grassroots

This web app offers the ability to add your Ontario Vaccination Receipt as a pass into your Apple Wallet on iOS. Grassroots accomplishes this without sending your data to a server and instead only uses a hashed representation for the signing step.

Here is a demo

Getting started

If you want to add your vaccination certificate into your wallet with Grassroots, there are two main options.

Visit https://grassroots.vaccine-ontario.ca

Quick start

Using our service

Go to https://grassroots.vaccine-ontario.ca
Click Ontario Health to download your vaccination receipt onto your iPhone
Select File, Browse, your-vaccine-receipt.pdf
Add to the wallet

Debug the web app

yarn install
yarn dev

Run the Docker container

docker build . -t covidpass
docker run -t -i -p 3000:3000 covidpass

FAQ

I do not want to trust a third party with my vaccination data, what makes this a secure option?

Processing of your data happens entirely in your browser and only a hashed representation is sent to the server for the signing step.

How do I make sure that nobody can access my vaccination pass from the lock screen (iOS)?

Navigate to the "TouchID & Code" or "FaceID & Code" or just "Code" section in the Settings and switch the toggle to off for Wallet in the section "Allow access from the lock screen". Also see this official guide from Apple.

Using your own Apple Developer Certificate

Get your certificate

Sign into your Apple Developer Account
Go to Certificates, Identifiers and Profiles
Register a new Pass Type Identifier under the Identifiers tab
Create a new Pass Type ID Certificate under the Certificates tab
Select your previously created Pass Type Identifier in the process
Move your new certificate to the My Certificates tab in the keychain
Export your certificate as a .p12 file
Install node.js and download the passkit-keys script
Create a keys folder and put the .p12 file inside
Run ./passkit-keys <path to your keys folder>
You may have to type in the passphrase you defined during the export step
Base64 encode the contents of the newly generated .pem file inside the keys folder

Run the API locally

A description of how you can use your certificate locally with the API will be provided in the readme of the CovidPass API. To connect the web app to your local server, you have to set the API_BASE_URL environment variable accordingly.

Explanation of the process

The whole process of generating the pass file happens locally in your browser. For the signing step, only a hashed representation of your data is sent to the server.

First, the following steps happen locally in your browser:

Validating the digital signature on the receipt to ensure it's authentic
Decoding your vaccination event data from the PDF file
Assembling a pkpass file out of your data
Generating a file containing hashes of the data stored in the pass file
Sending only the file containing the hashes to the server

Second, the following steps happen on the server:

Receiving and checking the hashes which were generated locally
Signing the file containing the hashes
Sending the signature back

Finally, the following steps happen locally in your browser:

Assembling the signed pass file out of the incomplete file generated locally and the signature
Saving the file on your device

Credits

The idea for this web app originated from the solution of an Austrian web developer, which only works for Austrian certificates at the moment.

The main codebase is forked from covidpass

Contribute

Any contribution to this project is welcome. Feel free to leave your suggestions, issues or pull requests.

4.1 KiB Raw Blame History