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Configure Microprofile JWT

This page guides you through configuring microprofile JWT (MP-JWT) for an OAuth/OpenID Connect web application. This is demonstrated using a sample application and describes how to generate JWT tokens by invoking the endpoints.


Set up the sample

First, let's configure the sample. Follow the steps given below:

  1. Clone

  2. Navigate to <SAMPLE_HOME>/microprofile/microprofile-jwt/src/main/liberty/config and open server.xml.

  3. Replace ${CARBON_HOME} with the directory where MWARE IAM is installed on your machine.

  4. Navigate back to <SAMPLE_HOME>/microprofile/microprofile-jwt andĀ open pom.xml.

  5. Uncomment the following section:

  6. Now, build the sample using the following command:

    mvn clean install

    This will generate a microprofile-jwt-<VERSION> in the target folder.

  7. Unzip the microprofile-jwt-<VERSION> and navigate to the sample-configuration-resources folder.

  8. Now run the following command to do the necessary configurations.


    Make sure you have xmllint installed to avoid errors due to unformatted responses.


    This configuration script will add the following configurations to the Identity Server:

    • Add three roles - Debtor, Creditor, and ViewBalance

    • Add three users - Cameron, Alex, and John

    • Assign roles to users: Cameron -> Debtor
      Alex -> Creditor
      John -> ViewBalance

    • Create a service provider named microprofile_jwt_sample with the necessary configurations to generate an MP-JWT-compatible JWT Token.

Run the sample

  1. Navigate to the target folder which was generated when the sample was built.

  2. Run the following command to start the wallet service written using Eclipse Microprofile Framework:

    java -jar secure-wallet-service.jar

    This sample service creates the following endpoints:

    • /wallet/balance which sends the current balance.

    • /wallet/credit?amount=<amount> which adds the given amount to the current balance.

    • /wallet/debit?amount=<amount> which subtracts the given amount from the current balance.

    These three endpoints are secured with MP-JWT as follows:

    • /balance endpoint can be called by users that are assigned one of the following roles: admin, ViewBalance, Debtor

    • /credit endpoint can be called by users that are assigned one of the following roles: admin, Creditor

    • /debit endpoint can be called by users that are assigned one of the following roles: admin, Debtor

Invoke the endpoints

You can generate the JWT tokens for each user by executing the cURL command given below using the following credentials:

User Username Password
Cameron cameron cameron123
Alex alex alex123
John john john123
curl -H "Authorization: Basic bGk2Sk1ialc2V0RNS1RXc1JuR2NqcDV6Y0doaTpOTUIzRUFmeGg0WXZTVHFiYjNpTWtvbmdBSGpX" -H "Content-Type: application/x-www-form-urlencoded" -k -d "grant_type=password&username=<username>&password=<password>&scope=openid" https://localhost:9443/oauth2/token

Now you can invoke the endpoints using a REST client such as Postman.

You need to provide the obtained JWT token in the authorization header as a bearer token.

If you try to invoke the endpoints without an authorization header, you will receive an HTTP 401 Unauthorized response.

If you invoke an endpoint with a token obtained for a user that has no access, you will receive an HTTP 403 Forbidden response. For instance, if you try to invoke the /debit endpoint while you only have the Creditor role, you will get the HTTP 403 Forbidden response.