LTI 1.3 Library Usage Example

See the Pied Piper LTI 1.3 Library in action. A Grader Module is used as the Tool example.

1) LMS Launches OIDC Login Flow

The OIDC login flow is initiated when a student clicks a Tool link in their course. When the student clicks the link, the LMS sends a GET or POST request to the Tool.

Simulate this by clicking:

LMS Generated Login Request

{
                  iss: 'https://demo.moodle.net',

                  target_link_uri: 'https://node-lti-v1p3.herokuapp.com/',

                  login_hint: '9',

                  lti_message_hint: '377'
                }

2) LTI1.3 Library Validates Login Request

The LTI1.3 Library validates the login request by ensuring the Issuer has registered with the Tool and the login is properly formatted. If so, the LTI1.3 Library sends a Login Response to the LMS's OIDC Authorization endpoint.

Simulate this by clicking:

Library Generated Login Response

3) LMS Sends Launch Request

The LMS validates the Login Response, and if valid sends a Launch Request. This flow is all transparent to the student.

Simulate this by clicking:

LMS Generated Launch Request

The Launch Request received is in the following format (id_token is truncated for space)...


              { id_token: 'eyJ0eXAiOiJKV1QiLCJhbGci...',
               state: 'qb9k4xSFfQMFQWoEKZTXMehVaaKH1y' }

...and the Library decodes and validates it:

4) LTI1.3 Library Launches Tool

The LTI1.3 Library authenticates and validates the Launch Request. If a Valid Launch Request, the Tool will be launched.

Simulate this by clicking:

LTI 1.3 Library Usage Example

See the Pied Piper LTI 1.3 Library in action. A Grader Module is used as the Tool example.

LMS Generated Login Request

Library Generated Login Response

LMS Generated Launch Request

Your Token