Hi!

I wanted to:
* centralize the parameterization of user authentication at the container level;
* have a simple NTLM authentication for intranet users;
* be able to run Tomcat in a Microsoft Active Directory network where the 
server is secured (absolutely no login allowed to regular users)

There is a Microsoft "specification" (bug?) by which all LDAP binds are 
evaluated on the Domain Server (like if the user was attempting to login on the 
Domain Server).
It would be better to have binds evaluated as if they were originating from the 
LDAP client machine (the Tomcat Server).

To circumvent this, I have been obliged to remove the binding (the password 
checking) but to ensure that it is NTLM (and nothing else) which provides the 
username.
The users are therefore automatically logged with the username used to log on 
their PC.

The attached patch is for current Apache Tomcat sources (6.0.18).

It adds:
An NTLM Authenticator: nothing to configure except in the web.xml of each 
application:
   <login-config>
       <auth-method>NTLM</auth-method>
       <realm-name>ThisIsApassword</realm-name>
   </login-config>
The realm-name is the "password" which ensures that authentication is done by 
NTLM and no other method.
A very long password is strongly recommended.
A modified JNDI Realm with new parameters:
preAuthenticatedPassword="ThisIsApassword"
This to suppress password checking if preAuthenticatedPassword is provided.
userIdentification="userPrincipalName" provides a standardized username, 
whatever the retrieved user name (case of complex userSearch patterns)
userNamePrefix and userNameSuffix
This to suppress a prefix and/or a suffix from username before returning it to 
the application: good to suppress domain identification, etc.
When you user complex userSearch pattern, this can be very useful. Example:
userSearch="(|(sAMAccountName={0})([EMAIL PROTECTED])(userPrincipalName={0}))"
userIdentification="userPrincipalName" userNamePrefix="domain\" 
userNameSuffix="@domain.com"

Hopes this can be useful to the community!

Please do not hesitate to ask me if something can be done to make this 
contribution perennial.

Wishing you a very nice day,

Christophe Dupriez
Centre Antipoisons - Antigifcentrum
C/o Hôpital Central de la Base Reine Astrid
   Rue Bruyn - 1120 Bruxelles - Belgique
tel 32-(0)2.264.96.36 fax 32-(0)2.264.96.46
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