[Zope] Login using Certificates

[Alexandre A. Drummond Barroso]

I have an installation of Zope as PCGI using Apache to communicate using SSL connections.
When Apache starts a CGI (and PCGI) programs, it sets many SSL environment variables, including e-mail and user id.
I would like to use this kind of information to automaticaly authenticate the user, without requesting user name and password.
Has anybody tried to do something like this?

Alexandre.