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Sam wants to start a service provider-initiated single sign-on and redirect to their own application, myapp.com. Which of the following URLs is the correct one to perform this action?
In SAML 2.0 federation with PingAM 8.0.2, there are two ways to initiate SSO: IdP-Initiated (where the user starts at the Identity Provider) and SP-Initiated (where the user starts at the Service Provider).3
According to the 'SAML 2.0 Guide' for PingAM:
SP-Initiated SSO: The correct JSP file for an SP-initiated flow is spSSOInit.jsp. 4This script is used by an SP (in this case, PingAM acting as an SP or a 'Fedlet') to generate a SAML AuthnRequest and send it to the IdP.
Redirecting to the Application: In the SAML 2.0 standard, the mechanism used to preserve state (like the final destination URL) across the redirect-heavy SSO process is the RelayState parameter. When the IdP sends the SAML assertion back to the SP, it also returns the RelayState value. The SP then uses this value to redirect the user to the final application.
While PingAM uses the goto parameter for internal redirects (like standard web login), RelayState is the required parameter name for SAML-related JSPs to ensure interoperability with the SAML specification. Therefore, the correct URL is .../spSSOInit.jsp combined with the RelayState parameter (Option D). Using idpSSOInit.jsp (Options A and B) would trigger an IdP-initiated flow, which is not what the question describes. Option C is incorrect because it uses the non-SAML goto parameter in a SAML initialization context.
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