Re: combining ldap and file authentication

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Hi Tom,

Thanks for the good answer.
Since its a Tomcat application in the background, do you think I could do
the passwd authentication via Apache and then the LDAP authentication via
Tomcat(JNDI)?

Regards,
Damjan.


Tom Evans-3 wrote:
> 
> On Wed, 2009-06-03 at 06:55 -0700, dimce wrote:
>> Hi all Apache cracks,
>> 
>> Is it possible to force both file and ldap authentication in Apache? 
>> The idea is that first the user gets a password window and is asked for
>> the
>> login details from a passwd file and after that he is asked for a ldap
>> password and only if both are true he is allowed access.
>> I already tried with:
>> <Location /secure>
>>   AuthType Basic
>>   AuthName "Auth"
>>   AuthBasicProvider file ldap
>>   AuthUserFile /etc/apache/passwd
>>   AuthLDAPURL ldap://...
>>   require valid-user
>> </Location>
>> But this seems to work for either type of authentication and I don't get
>> a
>> second authentication window.
>> 
>> Thanks,
>> Dimce.
> 
> This isn't possible with either apache or regular HTTP authentication.
> HTTP is stateless, this would require two requests and to know that the
> first phase of authentication was successful (and presumably, what type
> of authentication it was) requires state. 
> 
> Secondly, both of your authentication providers are Basic, which doesn't
> (iirc) allow multiple headers to be supplied. Even if it did, the
> behaviour you requested - browser prompts for first password, browser
> prompts for second password - requires this exchange: 
> 
> 1) browser requests page
> 2) server responds with '401 Unauthorized'
> 3) browser prompts for first username and password
> 4) server accepts first set of credentials, responds with '401
> Unauthorized'
> 5) browser prompts for second username and password
> 
> However, most/all browsers will empty their basic auth cache for that
> server/realm immediately on receiving a 401 response, so it will no
> longer submit the first set of credentials.
> 
> The only way to provide this kind of authentication scheme is with
> session based authentication (and therefore not using apache auth
> modules).
> 
> Tom
> 
> 
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