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From "Christian Schneider (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CXF-5118) Create CXF interceptor which will use HTTPS client certificates to create JAAS SecurityContext
Date Thu, 07 Aug 2014 12:40:12 GMT

    [ https://issues.apache.org/jira/browse/CXF-5118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14089177#comment-14089177
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Christian Schneider commented on CXF-5118:
------------------------------------------

I think you guys are right that we need the ability to use a password for the LoginModule.
We may be able to change the LoginModules in karaf but outside of karaf we have to live with
what is provided. Sergeys idea of using a bean is a possible solution. I have implemented
an alternative solution by using a separate interface to just map username to password.
I think this might be better as the mapping from cert to name and name to password might be
quite different. For example like Sergey described you might have the same password for all
technical user. So I made sure this case is especially simple.

Piotr also correctly stated that using no password by default might be a security problem.
So I implemented the CallbackHandlerProvider I originally wanted to do in separate issue.
Now we have three CallBackHandlerProviders one for AuthorizationPolicy, one for UsernameToken
and one for TLS cert handling. So by default the first two are active and the user can create
a list of providers like he wants to set it up. So the user is in fully control over what
is going to the LoginModules. He even can define additional CallbackHandlerProviders for other
authentication schemes. This way we can also add more handlers like e.g. for cert based auth
on the ws security level or for STS token based auth.

I think this solution is more in line of how JAAS works than the current solution from Piotr.
Still I think we could even handle the situation that Priotr supports where we do no real
authentication. It would work by creating a new LoginModule that simply creates the subject
from prinicpal and role data. 

I used a lot of code from the original solution of Piotr but did a slightly different design.
I hope you both like it. 
https://github.com/cschneider/cxf/commit/bc436011e99084b5e2f1165b70aa4cf028a49a1a
This commit is just the changes compared to my first commit. To see the full solution please
look into the sources directly.


> Create CXF interceptor which will use HTTPS client certificates to create JAAS SecurityContext

> -----------------------------------------------------------------------------------------------
>
>                 Key: CXF-5118
>                 URL: https://issues.apache.org/jira/browse/CXF-5118
>             Project: CXF
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Sergey Beryozkin
>            Assignee: Christian Schneider
>
> Use case:
> The user authenticates against the webservice using an X509 client certificate. In case
of successful authentication the JAAS security context should be populated with a Subject
that stores the user name and the roles of the user. This is necessary to support Authorization
at a later stage.
> Design ideas
> The SSL transport will be configured to only accept certain client certificates. So we
can assume that the interceptor does not have to do a real authentication. Instead it has
to map from the subjectDN of the certificate to the user name and then lookup the roles of
that user. Both then has to be stored in the subject's principles.
> The mapping could be done inside a JAASLoginModule or before. Inside will give the user
more flexibility.
> The next step to retrieve the roles should be done in one of the standard JAASLoginModules
as the source of the roles can be quite diverse. So for example the LdapLoginModule allows
to retrieve the roles from Ldap. At the moment these modules require the password of the user
though which is not available when doing a cert based auth.
> So I see two variants to retrieve the roles:
> 1. Change the loginmodules like the LDAP one to be configureable to use a fixed ldap
user for the ldap connect and not require the user password. So the module would have two
modes: a) normal authentication and group gathering b) use a fixed user to just retrieve roles
for a given user
> 2. Store the user password somewhere (e.g. in the mapping file). In this case the existing
LDAPLoginModule could be used but the user password would be openly in a text file
> 3. Create new LoginModules with the desired behaviour (fixed user and only lookup of
roles)



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