Adding to Apple health/wallet

[daniellrgn]

To support COVID-19 SMART Health Cards, Apple added a URL scheme for importing SHC content, as well as detection of QR codes containing SHC data. Whether the data included in the URL fits in a QR code or not, the content can be added to Apple Health. Given the SHC data does fit in a QR code, it will also automatically create a wallet entry with the SHC QR code.

SHL in Apple Wallet

Since SHL content is often too large for a QR code, using the same methods with the SHC contained in a SHL only imports the data to Apple Health and does not automatically create a Wallet entry. Ideally, a Wallet entry would include the SHL and metadata like its label, expiration, etc., but this would have to be custom-made (requires Apple Developer registration, card design, and wallet certification).

SHL in Apple Health

An SHL can't yet be added directly to Apple Health, but its SHC content can. To add an SHL's SHC record to Apple Health, add Apple's button w/url like https://redirect.health.apple.com/SMARTHealthCard/[encoded shc] where the encoded SHC is the output of

let str = shc_jws;
let numericEncodings = [];
for (let i=0; i<str.length; i++) {
  let c = str.charCodeAt(i) - 45;
  if (c < 10) {
    c = "0"+c;
  } else {
     c = c.toString();
  }
  numericEncodings.push(c);
}
let num = numericEncodings.join("");
return num;