This context may be used to authenticate a Single Signon initiator based
on a security token sent by the intiator and to generate a token to be
sent back to the initiator so that it can authenticate the acceptor.
accepts/authenticates an SSO token sent from the context initiator side.
accept() should be called only once. Subsequent calls produce
undefined results.
Parameter Token
the SSO token sent by the initiator.
Returns
the sequence of bytes to be sent back to the initiator to allow
authentication of the acceptor side, if mutual authentication is
supported by the security context. If mutual authentication is not
supported a zero length sequence is returned.
