protected AuthnRequest getAuthnRequest(AuthenticationContext context) throws SAMLSSOException { AuthnRequest authnRequest = null; AuthenticationRequest authenticationRequest = context.getAuthenticationRequest(); String[] samlRequestParams = authenticationRequest.getRequestQueryParam(SSOConstants.HTTP_POST_PARAM_SAML2_AUTH_REQ); String samlRequest = null; if (samlRequestParams != null && samlRequestParams.length > 0) { samlRequest = samlRequestParams[0]; XMLObject xmlObject; if (authenticationRequest.isPost()) { xmlObject = unmarshall(SSOUtils.decodeForPost(samlRequest)); } else { xmlObject = unmarshall(SSOUtils.decode(samlRequest)); } if (xmlObject instanceof AuthnRequest) { authnRequest = (AuthnRequest) xmlObject; } } return authnRequest; }