Flutter AppAuth + FusionAuth + Docker

Project developed to reproduce a bug of the Flutter AppAuth plugin. All data for this project is not real. All project keys were randomly generated on the Internet.

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Initialize the project:

To start, clone the repository, cd to it and run the command below.

docker-compose up -d --build

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Description of container ports:

• 9011 Used for FusionAuth.
• 5432 Used by Postgres.

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How to access FusionAuth Dashboard:

After initializing the containers, access http://localhost:9011 with username: lima@jhordan.com and password: jhordan123 to access FusionAuth dashboard.

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Demonstrating the bug:

After initializing the containers, build the flutter application and try to authenticate with FusionAuth. Note that FusionAuth is serving as an identity provider for other services. An error like the example below is expected.

PlatformException (PlatformException(authorize_and_exchange_code_failed, Failed to authorize: [error: null, description: Invalid ID Token], Issuer host can not be empty, null))

To bypass this error, uncomment the serviceConfiguration parameter inside the authorizeAndExchangeCode method.

However, when using other identity providers, the error does not happen, for example, if we overwrite the test parameters with the example below:

final result = await appAuth.authorizeAndExchangeCode(
    AuthorizationTokenRequest(
        'interactive.public',
        'com.example.loginsso://oauth2',
        issuer: 'https://demo.identityserver.io',
        scopes: ['openid', 'profile', 'email', 'api', 'offline_access'],
        promptValues: ['login'],
        loginHint: 'bob',
    ),
);