JWKs Base64url-encoded values must not use padding

This is a technical story which was only impacting a single client with a strict interpretation of the specification. Thus the testing is to check there has been no regression on LTI 1.3 by verifying an LTI 1.3 launch works properly. Any LTI 1.3 tool can be used for this test. Setup Log in as an administrator Navigate to Site Administration > Plugins > External tool > Manage tools Click on configure a tool manually Fill the form as follow: Tool name: ZTest 1.3 Tool url: https://ztest.cengage.info/ztest/lti LTI Version: LTI 1.3 Public key: copy the value from https://ztest.cengage.info/ztest/ LTI 1.3 Connect info tab Initiate Login URI: https://ztest.cengage.info/ztest/ws/lti/startlaunch?lti13=true&platform=moodle Redirect URI: https://ztest.cengage.info/ztest/lti13 Click on ‘Show more’ Check Content-Item message The following steps are only needed until MDL-67702 is integrated: Once the tool is created, click the information icon (pie icon) and copy the client id Update the initiate login URI and replace CLIENT_ID_HERE with the client id value for that tool Testing scenario: Verify LTI Launch As instructor, log to a course Turn editing ON Click Add an activity or resource and select external tool On the Add external tool page, select ZTest 13 tool for preconfigured tool Turn on your browser developer tools - network Click on Select Content Verify there is no error in the tool: Successful Launch is displayed