Kinegram eMRTD Connector SDK for Flutter

The Kinegram eMRTD Connector enables your Flutter app to read and verify electronic passports (eMRTDs) and ID cards.

    ┌───────────────┐     Results     ┌─────────────────┐
    │ DocVal Server │────────────────▶│   Your Server   │
    └───────────────┘                 └─────────────────┘
            ▲
            │ WebSocket
            ▼
┏━━━━━━━━━━━━━━━━━━━━━━━━┓
┃                        ┃
┃    eMRTD Connector     ┃
┃                        ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━┛
            ▲
            │ NFC
            ▼
    ┌──────────────┐
    │              │
    │   PASSPORT   │
    │              │
    │   ID CARD    │
    │              │
    │              │
    │   (eMRTD)    │
    │              │
    └──────────────┘

The Kinegram eMRTD Connector enables the Document Validation Server (DocVal) to communicate with the eMRTD through a secure WebSocket connection.

Quick start

1. Add the plugin to your pubspec.yaml:

   dependencies:
     emrtd: ^latest
   

2. Import and create an instance in your widget:

   import 'package:emrtd/emrtd.dart';
   
   final _emrtd = Emrtd();
   

3. Read and verify the document using either MRZ values or the CAN:

   final result = await _emrtd.readAndVerify(
     clientId: 'your_client_id',
     validationUri: 'wss://docval.kurzdigital.com/ws2/validate',
     validationId: 'unique-session-id',
     documentNumber: 'C01X00000',
     dateOfBirth: '900101',
     dateOfExpiry: '300101',
   );
   
   // Alternatively, use the CAN (Card Access Number).
   final resultWithCan = await _emrtd.readAndVerifyWithCan(
     clientId: 'your_client_id',
     validationUri: 'wss://docval.kurzdigital.com/ws2/validate',
     validationId: 'unique-session-id',
     can: '123456',
   );
   

The readAndVerify… calls initiate an NFC session, read the eMRTD chip with the provided credentials, and send the result to the validator referenced by validationUri.

iOS requirements

The native KinegramEmrtdConnector SDK the plugin wraps requires iOS 15.0+. Ensure your consuming Flutter app sets the same deployment target in ios/Podfile, ios/Runner.xcodeproj, and ios/Flutter/AppFrameworkInfo.plist before running pod install or flutter run on iOS.

1. Enable NFC Capability

This needed entitlement is added automatically by Xcode when enabling the Near Field Communication Tag Reading capability in the target Signing & Capabilities.

After enabling the capability the *.entitlements file needs to contain the TAG (Application specific tag, including ISO 7816 Tags) and PACE (Needed for PACE polling support (some ID cards)) format:

...
<dict>
    <key>com.apple.developer.nfc.readersession.formats</key>
    <array>
        <string>PACE</string>
        <string>TAG</string>
    </array>
</dict>
...

2. Info.plist (AID & NFCReaderUsageDescription)

The app needs to define the list of AIDs it can connect to, in the Info.plist file.

The AID is a way of uniquely identifying an application on a ISO 7816 tag. eMRTDS use the AIDs A0000002471001 and A0000002472001. Your Info.plist entry should look like this:

    <key>com.apple.developer.nfc.readersession.iso7816.select-identifiers</key>
    <array>
        <string>A0000002471001</string>
        <string>A0000002472001</string>
    </array>

• Additionally set the NFCReaderUsageDescription key:

    <key>NFCReaderUsageDescription</key>
    <string>This app uses NFC to verify passports</string>