In a nutshell, I'm looking to have WordPress use our LDAP servers to authenticate users instead of WordPress' database. I'll still create users in WordPress and have the WordPRess usernames match our LDAP entries, but I want the authentication to come from our LDAP server instead of WordPress. I know there are a few LDAP plugins out there, but I don't need all the extra functionality that they offer.
So, can anyone tell me what file or files I'd need to modify in order to bypass WordPress' password checks and use my LDAP server instead? I can hack together the LDAP part, I'm just not sure where to start snooping around in WordPress files.