How-to read "session index"

SAML for ASP.NET Core
1

i’m developing a SAML authentication for our apps, all went fine with encryption, signature verification, …
Actually i’m stuck trying to read the “session index” that i see in the trace:

Name ID: <saml:NameID Format=“urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified” xmlns:saml=“urn:oasis:names:tc:SAML:2.0:assertion”>johndoe</saml:NameID>
Session index: 04386a0f-753e-47ea-83e8-ad39eab656d4::51231c12-467e-49f2-b427-c01d296d2ae5

i believe this index can be usefull to my needs, i wish to save it in a custom table with some other information from the assertion to make them available to other applications

thks in advance

2

The following code demonstrates retrieving the session index from the authn statement.


// Save the session index from the SAML assertion.
string sessionIndex;

_samlServiceProvider.Events.OnSamlAssertionReceived += (httpContext, samlAssertion) =>
{
var authenticationStatements = samlAssertion.GetAuthenticationStatements();

if (authenticationStatements != null && authenticationStatements.Count > 0)
{
sessionIndex = authenticationStatements[0].SessionIndex;
}
};

// Receive and process the SAML assertion contained in the SAML response.
// The SAML response is received either as part of IdP-initiated or SP-initiated SSO.
var ssoResult = await _samlServiceProvider.ReceiveSsoAsync();