On SP initiated logout, the SP x509 certificate was included in the
HTTP redirect URL. First this was an SAML standard violation, and second
it inflated the URL beyond 2038 bytes, which is the maximum length for
IE7 and prior. As a result, SP initated single logout was broken with IE7
and prior versions.
Alliance standards: ID-FF, ID-WSF and SAML. It defines processes for
federated identities, single sign-on and related protocols. Lasso is
built on top of libxml2, XMLSec and OpenSSL and is GPL licensed.
