public String generateAuthnRequest ( final String requestId ) throws SAMLException { final String request = _createAuthnRequest ( requestId ) ; try { final byte [ ] compressed = deflate ( request . getBytes ( "UTF-8" ) ) ; return DatatypeConverter . printBase64Binary ( compressed ) ; } catch ( UnsupportedEncodingException e ) { throw new SAMLException ( "Apparently your platform lacks UTF-8. That's too bad." , e ) ; } catch ( IOException e ) { throw new SAMLException ( "Unable to compress the AuthnRequest" , e ) ; } }
Create a new AuthnRequest suitable for sending to an HTTPRedirect binding endpoint on the IdP . The SPConfig will be used to fill in the ACS and issuer and the IdP will be used to set the destination .