SAML 2.0 is an XML-based protocol. It uses security tokens containing assertions to pass information about an end-user between a SAML authority and a SAML consumer. A SAML authority is an identity provider (IDP) and a SAML consumer is a service provider (SP).
Enterprise applications that have SAML2 based SSO infrastructures sometimes need to consume OAuth-protected resources through APIs. However, these apps prefer to use the existing trust relationship with the IDP, even if the OAuth authorization server is entirely different from the IDP. The API Cloud leverages this trust relationship by exchanging the SAML2.0 token to an OAuth token with the authorization server. It acts as the OAuth authorization server.
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Let's configure the token exchange.
Configuring the token exchange
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Before you begin, make sure you have the following:
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To configure the Identity Provider:
- On the Configure menu, click External Users:
- In the Connect External Users to API Cloud screen, click the API Consumer Authentication tab, and then select the Connect your IdP (SAML Grant) option:
- Provide the following values:
Identity Provider Public Certificate: The certificate used to sign the SAML assertion. Export the public certificate of WSO2 IS and import it here.
- Identity Provider Entity Id: The SAML2 issuer name specified when generating the assertion token, which contains the unique identifier of the IDP.
- SSO URL: Enter the IDP's SAML2 Web SSO URL value. E.g., https://localhost:9444/samlsso/ if you have offset the default port, which is 9443.
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