Integrating Google Workspace with AWS Cognito for SAML Login "relayState from identity provider. "

Question

Hi everyone,

I'm currently facing an issue with integrating Google Workspace with AWS Cognito. My goal is to deploy an application where only users from my Google Workspace organization can log in. Here's what I've done so far:
In the Google Workspace Admin Panel, I created a SAML app.
In AWS Cognito, I added this SAML app as an identity provider.

However, when I attempt to log in, I encounter the following error: "Invalid relayState from identity provider."

Has anybody else faced this problem? I've come across many posts about integrating Google with Cognito, but my specific requirement is to ensure that only email addresses from my company's domain are able to log in through the Cognito user pool.

Any advice or insights would be greatly appreciated!

Thank you in advance for your help!

Giovanni Lauria · Answer

The error “Invalid relayState from identity provider” usually occurs when there is a mismatch between the RelayState parameter configured in your Identity Provider (IdP) and the one expected by AWS Cognito.

As of February 2024, AWS Cognito does support the IdP initiated flow. If you are using IdP-initiated SAML, you need to update the format of your RelayState.

Ref: https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-SAML-session-initiation.html#cognito-user-pools-SAML-session-initiation-idp-initiation

Tatev · Answer

Thanks for your answer. I found a solution: add identity_provider=youridentityproviderid&client_id=yourclientid&redirect_uri=yourredirecturl&response_type=token&scope=openid+email+profile to my Google SAML start URL. The scope in the URL needs to be the same as the AWS Cognito client OpenID Connect scopes.

Integrating Google Workspace with AWS Cognito for SAML Login "relayState from identity provider. "

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