Spring Boot with REST API secured by JSON Web Token (JWT)

Prerequisites

• Maven 3
• JDK 21

Use https://jwt.io to decode your generated token
Use https://base64encode.org to encode/decode to/from Base64

How to build jar

./gradlew clean build

How to build Docker image

docker build ./ -t oauth-service-app

How to run jars

java -jar ./build/libs/auth-server-0.1-SNAPSHOT.jar --auth.profile=mvpd
java -jar ./build/libs/auth-server-0.1-SNAPSHOT.jar --auth.profile=ott

How to run in Docker

docker-compose up

How to run both services in Docker containers with rebuild of images

docker-compose up --build --force-recreate --no-deps

Configuration info

• Client: entitlements
• Secret:
  • ott (for auth.profile=ott)
  • mvpd (for auth.profile=mvpd)
• Username / password:
  • alice/password
  • bob/password
  • clara/password

See this article for info about different types of OAuth 2.0 grants

Authorization Grant cases

1. Authorisation Code Grant

Authorize using login form on authorization server, get authorization code, exchange it to access token. Very familiar if you’ve ever signed into an application using your Facebook or Google account.

Flow, part one: authorize using login form on authorization server

Use link: http://localhost:9090/oauth/authorize?client_id=entitlements&state=abc-123&response_type=code&redirect_uri=http://localhost:9191/x&node-name=hulu

The state here is CSRF token. This parameter is optional but recommended. You should store the value of the CSRF token in the user’s session to be validated when they return.

The user will then be asked to login to the authorization server and approve the client.

Put bob/ott login/password pair into form and click Approve

(The login/password pairs populated into in-memory DB H2. For details check sql scripts in resources folder if needed)

If the user approves the client they will be redirected from the authorisation server back to the client (specifically to the redirect URI). After some delay (due to redirection to some fake non-existing resource localhost:9191) you get string like next in browser address field: http://localhost:9191/x?code=qjGBjC&state=abc-123.
Get code qjGBjC for future reuse in next actions.
The returned state abc-123 used to compare with the state parameter sent in the original request.

Generate access token using authorization code from previous step

Use the following generic command to generate an access token:

For this specific application, to generate an access token for the user bob, run next command:

curl http://localhost:9090/oauth/token \
  -H "Content-type: application/x-www-form-urlencoded" \
  -d 'grant_type=authorization_code&redirect_uri=http://localhost:9191/x&code=qjGBjC' \
  -u entitlements:ott

As you see - already generated for bob code qjGBjC was used

You'll receive responses similar to below

{
  "access_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsibm9uX3BpaV9pZCJdLCJ1c2VyX25hbWUiOiJib2IiLCJzY29wZSI6WyJyZWFkIl0sImV4cCI6MTU4NTIyOTMyOCwiYXV0aG9yaXRpZXMiOlsiUk9MRV9VU0VSIl0sImp0aSI6IjIxODEwZWUxLWI5MGQtNDQ4My1hYTE1LTJlNjZkOTc4MjhlZSIsImNsaWVudF9pZCI6ImVudGl0bGVtZW50cyIsIm5vbl9waWlfaWQiOiIyZjgtNGRhIn0.5Ef4wabYaGi5Ed56kD9bLip92BDx6-WeKNfmwh7P-wI",
  "token_type": "bearer",
  "refresh_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsibm9uX3BpaV9pZCJdLCJ1c2VyX25hbWUiOiJib2IiLCJzY29wZSI6WyJyZWFkIl0sImF0aSI6IjIxODEwZWUxLWI5MGQtNDQ4My1hYTE1LTJlNjZkOTc4MjhlZSIsImV4cCI6MTU4NzczNDkyOCwiYXV0aG9yaXRpZXMiOlsiUk9MRV9VU0VSIl0sImp0aSI6ImFmOTk4NzNlLTVkMzItNDk1MS04YWFmLWFjN2VjYmViZjE4YiIsImNsaWVudF9pZCI6ImVudGl0bGVtZW50cyIsIm5vbl9waWlfaWQiOiIyZjgtNGRhIn0.pwDQPzq_pMzOMb5f_0GcZWo_mcd2ncT4oI-qbneOI_Y",
  "expires_in": 86399,
  "scope": "read",
  "non_pii_id": "2f8-4da",
  "jti": "21810ee1-b90d-4483-aa15-2e66d97828ee"
}

2. Resource owner credentials grant

Get access token using login/password. Used for trusted first party clients both on the web and in native device applications.

Generate access token using password

curl -X POST http://localhost:9090/oauth/token \
  -H 'Authorization: Basic ZW50aXRsZW1lbnRzOm90dA==' \
  -H 'Content-type: application/x-www-form-urlencoded' \
  -d 'grant_type=password' -d 'username=bob' -d 'password=ott'

Here we use header for basic authorization client_name:client_secret encoded into Base64:

entitlements:ott -> ZW50aXRsZW1lbnRzOm90dA==

You'll receive response similar to below

{
  "access_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsic3Vic2NyaXB0aW9ucyIsInVzZXJzIl0sInVzZXJfbmFtZSI6ImJvYiIsInNjb3BlIjpbInJlYWQiXSwiZXhwIjoxNjUwNzA1MzY3LCJhdXRob3JpdGllcyI6WyJST0xFX1VTRVIiXSwianRpIjoiM2MwNjA2MjctM2FiNy00YTQyLTg4MmMtMjA4OWJkZjBlZTg1IiwiY2xpZW50X2lkIjoiZW50aXRsZW1lbnRzIiwibm9uX3BpaV9pZCI6IjJmOC00ZGEifQ.l_VgIDAXEuJu7Osv6mxmFv0J--MVJ7ZL8PwgnH-l2e0",
  "token_type": "bearer",
  "refresh_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsic3Vic2NyaXB0aW9ucyIsInVzZXJzIl0sInVzZXJfbmFtZSI6ImJvYiIsInNjb3BlIjpbInJlYWQiXSwiYXRpIjoiM2MwNjA2MjctM2FiNy00YTQyLTg4MmMtMjA4OWJkZjBlZTg1IiwiZXhwIjoxNjUzMjEwOTY3LCJhdXRob3JpdGllcyI6WyJST0xFX1VTRVIiXSwianRpIjoiNTI2YjBiY2YtYzc5OS00NzBlLThkNmYtNzY0ZGMzZDQ4NTI0IiwiY2xpZW50X2lkIjoiZW50aXRsZW1lbnRzIiwibm9uX3BpaV9pZCI6IjJmOC00ZGEifQ.NlH1NftfyuQLQ3sGwrzVL5wg9alvIS_2MOnSMpxrWZg",
  "expires_in": 86399,
  "scope": "read",
  "non_pii_id": "2f8-4da",
  "jti": "3c060627-3ab7-4a42-882c-2089bdf0ee85"
}

3. Client credentials grant

The simplest of OAuth 2.0 grants, it is suitable for machine-to-machine authentication where a specific user’s permission to access data is not required.

Generate access token using password

curl -X POST http://localhost:9090/oauth/token \
  -H 'Authorization: Basic ZW50aXRsZW1lbnRzOm90dA==' \
  -H "Content-type: application/x-www-form-urlencoded" \
  -d 'grant_type=client_credentials'

Here we use header for basic authorization client_name:client_secret encoded into Base64:

entitlements:ott -> ZW50aXRsZW1lbnRzOm90dA==

You'll receive response similar to below

{
  "access_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsic3Vic2NyaXB0aW9ucyIsInVzZXJzIl0sInNjb3BlIjpbInJlYWQiXSwiZXhwIjoxNjUwNzA1MTQ5LCJqdGkiOiJmNGY3MWJmNy04YmRlLTQ0YWYtOGI5Zi00NzY1YzY0OGFlNmYiLCJjbGllbnRfaWQiOiJlbnRpdGxlbWVudHMifQ.kJXmS4e0dNzzYnJayKwH3VMU1bYnAa2ENV1aNMnIzAQ",
  "token_type": "bearer",
  "expires_in": 86399,
  "scope": "read",
  "jti": "f4f71bf7-8bde-44af-8b9f-4765c648ae6f"
}

Check existing token

To check existing token use:

curl -X POST client:secret@localhost:9090/oauth/check_token?token=TOKEN_HERE

For our case it should be:

curl -X POST entitlements:ott@localhost:9090/oauth/check_token?token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsibm9uX3BpaV9pZCJdLCJ1c2VyX25hbWUiOiJib2IiLCJzY29wZSI6WyJyZWFkIl0sImV4cCI6MTU4NTIyOTMyOCwiYXV0aG9yaXRpZXMiOlsiUk9MRV9VU0VSIl0sImp0aSI6IjIxODEwZWUxLWI5MGQtNDQ4My1hYTE1LTJlNjZkOTc4MjhlZSIsImNsaWVudF9pZCI6ImVudGl0bGVtZW50cyIsIm5vbl9waWlfaWQiOiIyZjgtNGRhIn0.5Ef4wabYaGi5Ed56kD9bLip92BDx6-WeKNfmwh7P-wI

You'll receive a response similar to below

{
  "aud": [
    "non_pii_id"
  ],
  "user_name": "bob",
  "scope": [
    "read"
  ],
  "active": true,
  "exp": 1585229328,
  "authorities": [
    "ROLE_USER"
  ],
  "jti": "21810ee1-b90d-4483-aa15-2e66d97828ee",
  "client_id": "entitlements",
  "non_pii_id": "2f8-4da"
}

or next

{
  "error": "invalid_token",
  "error_description": "Encoded token is a refresh token"
}

Get new token pair using refresh token

To get new token pair using existing refresh token use:

curl -X POST -d refresh_token=REFRESH_TOKEN_HERE -d grant_type=refresh_token client:secret@localhost:9090/oauth/token

For our case it should be:

curl -X POST -d refresh_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsibm9uX3BpaV9pZCJdLCJ1c2VyX25hbWUiOiJib2IiLCJzY29wZSI6WyJyZWFkIl0sImF0aSI6IjIxODEwZWUxLWI5MGQtNDQ4My1hYTE1LTJlNjZkOTc4MjhlZSIsImV4cCI6MTU4NzczNDkyOCwiYXV0aG9yaXRpZXMiOlsiUk9MRV9VU0VSIl0sImp0aSI6ImFmOTk4NzNlLTVkMzItNDk1MS04YWFmLWFjN2VjYmViZjE4YiIsImNsaWVudF9pZCI6ImVudGl0bGVtZW50cyIsIm5vbl9waWlfaWQiOiIyZjgtNGRhIn0.pwDQPzq_pMzOMb5f_0GcZWo_mcd2ncT4oI-qbneOI_Y -d grant_type=refresh_token entitlements:ott@localhost:9090/oauth/token

You'll receive a response similar to below

{
  "access_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsibm9uX3BpaV9pZCJdLCJ1c2VyX25hbWUiOiJib2IiLCJzY29wZSI6WyJyZWFkIl0sImV4cCI6MTU4NTIyOTY5MywiYXV0aG9yaXRpZXMiOlsiUk9MRV9VU0VSIl0sImp0aSI6IjRkMmNmNWIwLWNkZTYtNDgyNS05NWExLTc1MTVkNWM5OTM3OCIsImNsaWVudF9pZCI6ImVudGl0bGVtZW50cyIsIm5vbl9waWlfaWQiOiIyZjgtNGRhIn0.XqP3T4hrROecgNqHIAgL1sBUhraN-I6pM3q0rbJjSus",
  "token_type": "bearer",
  "refresh_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsibm9uX3BpaV9pZCJdLCJ1c2VyX25hbWUiOiJib2IiLCJzY29wZSI6WyJyZWFkIl0sImF0aSI6IjRkMmNmNWIwLWNkZTYtNDgyNS05NWExLTc1MTVkNWM5OTM3OCIsImV4cCI6MTU4NzczNDkyOCwiYXV0aG9yaXRpZXMiOlsiUk9MRV9VU0VSIl0sImp0aSI6ImFmOTk4NzNlLTVkMzItNDk1MS04YWFmLWFjN2VjYmViZjE4YiIsImNsaWVudF9pZCI6ImVudGl0bGVtZW50cyIsIm5vbl9waWlfaWQiOiIyZjgtNGRhIn0.XNjkVBwrldmX16ziIgdIZNGGcdrLPoLxkf4YWXxX1xU",
  "expires_in": 86399,
  "scope": "read",
  "non_pii_id": "2f8-4da",
  "jti": "4d2cf5b0-cde6-4825-95a1-7515d5c99378"
}

Use tokens to access resources through your REST-ful API

Use the generated token as the value of the Bearer in the Authorization header as follows:

curl http://localhost:9091/YOUR_RESOURCE_PATH -H "Authorization: Bearer ACCESS_TOKEN_HERE"