LDAP validation using certificates

I've read about this topic in mailing list but I didn't found the solution. I want validate LDAP users against Apache using the 开发者_开发知识库certificates than the user store in LDAP.

I mean, I create and store the X509 certificates in LDAP. Afterwards I send to my clients the certificate and they install those certificates in their browsers. Now I want validate the users using the certificate instead of the user-name and the password.

I've reading about third party modules (ModXAuthLDAP, mod_authz_ldap) but they are very old and don't work in Apache 2.2.

I’d be interested in comments and some kind of solution to do this authentication process.

Kind regards

Martín Sánchez