fromBytes static method

PkPass fromBytes(Uint8List bytes, { bool skipChecksumVerification = false, bool skipSignatureVerification = false, })

Parses bytes to a PkPass instance.

Setting skipChecksumVerification to true disables any checksum verification and validation.

Setting skipSignatureVerification to true disables any signature verification and validation. This may be needed for older passes which are signed with an out of date Apple WWDR certificate.

Implementation

// TODO(any): Provide an async method for this.
static PkPass fromBytes(
  final Uint8List bytes, {
  bool skipChecksumVerification = false,
  bool skipSignatureVerification = false,
}) {
  if (bytes.isEmpty) {
    throw EmptyBytesException();
  }

  ZipDecoder decoder = ZipDecoder();
  final archive = decoder.decodeBytes(bytes);

  final manifest = archive.readManifest();
  final passData = archive.readPass();
  if (!skipChecksumVerification) {
    archive.checkSha1Checksums(manifest);
    if (!skipSignatureVerification) {
      final manifestContent =
          archive.findFile('manifest.json')!.binaryContent;
      final signatureContent = archive.findFile('signature')!.binaryContent;

      if (!verifySignature(
        signatureBytes: signatureContent,
        manifestBytes: manifestContent,
        teamIdentifier: passData.teamIdentifier,
        identifier: passData.passTypeIdentifier,
      )) {
        throw Exception('validation failed');
      }
    }
  }

  return PkPass(
    // data
    pass: passData,
    manifest: manifest,
    personalization: archive.readPersonalization(),
    languageData: archive.getTranslations(),
    // images
    // TODO(ueman): Images can be localized, too
    //              Maybe it's better to have an on-demand API, something like
    //              PkPass().getLogo(resolution: 3, languageCode: 'en_EN').
    logo: archive.loadImage('logo'),
    icon: archive.loadImage('icon'),
    footer: archive.loadImage('footer'),
    thumbnail: archive.loadImage('thumbnail'),
    strip: archive.loadImage('strip'),
    background: archive.loadImage('background'),
    personalizationLogo: archive.loadImage('personalizationLogo'),
    // source
    sourceData: bytes,
  );
}