README.md

VerificaC19 package for Flutter

About

This package allows to decode and validate any EU Digital Green Certificate in your Flutter application. It is based on the specifications contained in the official it-dgc-verificac19-sdk-android repository.

This library requires an internet connection to download and cache rules, CRL and DSCs at least once per day. Once updated the entire process of validation can be done completely offline and in real-time.

Starting from version 1.4.3, this package has been included in the list of verified SDKs by Italian authorities (Ministero della salute).

Development & testing

• Clone the repository

git clone https://github.com/mastro993/verificac19_flutter.git

• Get packages

cd verificac19_flutter

flutter pub get

• QR codes for testing can be obtained from this link: https://dgc.a-sit.at/ehn/testsuite

Installation

flutter pub add verificac19

Example app

An example application can be seen here.

Usage

Setup

First thing to do is to initialize the package. This allows to all internal initializations to be done.

await VerificaC19.initialize();

Download and cache rules, CRL data and DSCs

You can download and cache rules, CRL data and DSCs using the update function. This will update data only if the 24 hours update window is expired.

await VerificaC19.update();

You can also check if the data is expired (older than the 24 hours update window) without requiring an update with the needsUpdate function.

bool requiresUpdate = await VerificaC19.needsUpdate();

Verify and validate a DGC

You can verify and validate a DGC from a String containing a base45 encoded data.

// Validate frombase45 encoded data
ValidationResult result = await VerificaC19.validateFromRaw('HC1:NCFOXN%TSM...');

The result is a ValidationResult object containing the decoded Certificate object and its CertificateStatus which can have the following values:

	Code	Description
✅	valid	Certificate is valid
⚠	testNeeded	Test needed if verification mode is boosterDGP
❌	notValid	Certificate is not valid
❌	notValidYet	Certificate is not valid yet
❌	revoked	Certificate has been revoked
❌	notEuDCC	Certificate is not an EU DCC

You can also provide a ValidationMode parameter.

Code	Description
normalDGP	Normal verification (default value)
superDGP	Super Green Pass verification

Example:

ValidationResult result = await VerificaC19.validateFromRaw('HC1:NCFOXN%TSM...', mode: ValidationMode.normalDGP);
// or
ValidationResult result = await VerificaC19.validateFromRaw('HC1:NCFOXN%TSM...', mode: ValidationMode.superDGP);