A library for supporting the SAML2 HTTP-POST-SimpleSign binding. Only supporting SimpleSign allows us to provide a SAML2 SP, using only the standard library, and M2Crypto for signature verification. The IdP SSO Binding is currently only HTTP-Redirect. This has been tested against SAML2 IdPs, including shibboleth. When using shibboleth, responses must be always be signed. XMLsig signatures are ignored.