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Learning Tools Interoperability: Verifying Launch Messages

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Learning Tools Interoperability®: Verifying Launch Messages

A fundamental part of any LTI® Tool Provider implementation is validating incoming launch messages - this section illustrates the steps required with some example code.  For a tool provider this is the equivalent of processing the submission of a login page where a user has entered their username and password.  In this case, however, the user credentials (along with other data) are received via an LTI launch message.  If a tool provider also allows direct logins, then some of the code for processing these requests may be re-usable for handling LTI requests.

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