Amazon Cognito | Verify format of SAMLRequest sent to IDP

Question

We are integrating with a partner who uses Amazon Cognito and we are the IDP. They have loaded our IDP metadata file and when I send a request to their authorization endpoint to initiate the SAML session, we receive a request containing SAMLRequest and RelayState values.

Amazon Cognito documentation does not state how the SAMLRequest and RelayState are generated/formatted.

Are these values encrypted and then Base64 encoded? Are there any samples or examples available of what an unencrypted SAMLRequest contains?

Answer

Hi,

Cognito SAML Request are following SAML 2.0 standard are are not encrypted only signed.

You can find more information in https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-saml-idp.html

Cognito SAML Metadata can be constructed based on https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-integrating-3rd-party-saml-providers.html

Jeff

Amazon Cognito | Verify format of SAMLRequest sent to IDP

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