Delphi SAML Single Sign-On

uses
  sgcAuth_SAML_SP;

// SAML is a form field: SAML: TsgcSAMLServiceProvider;
procedure TForm1.ConfigureSAML(const aIdPMetadataXML: string);
begin
  SAML := TsgcSAMLServiceProvider.Create(nil);
  SAML.EntityID := 'https://app.example.com/saml/metadata';
  SAML.AssertionConsumerServiceURL := 'https://app.example.com/saml/acs';
  // entity ID, SSO URL, binding and signing certificates of the IdP
  SAML.LoadIdPMetadata(aIdPMetadataXML);
end;

// GET /saml/metadata: return SAML.GetMetadata and register it in the IdP

// GET /saml/login: redirect the browser to the IdP
function TForm1.LoginURL(const aRelayState: string;
  out aRequestID: string): string;
begin
  // keep aRequestID for this RelayState, the ACS needs it
  Result := SAML.GetAuthnRequestRedirectURL(aRelayState, aRequestID);
end;

// POST /saml/acs: validate the signed response posted by the browser
function TForm1.ValidateResponse(const aSAMLResponse, aRelayState,
  aRequestID: string): string;
var
  oResult: TsgcSAMLResult;
begin
  oResult := TsgcSAMLResult.Create;
  try
    if SAML.ProcessResponse(aSAMLResponse, aRelayState, aRequestID, oResult) then
      Result := oResult.NameID // plus oResult.Attributes and SessionIndex
    else
      raise Exception.Create(oResult.ErrorMessage);
  finally
    oResult.Free;
  end;
end;