Sergey, BTW: I DID add a system test of the optimized UsernameToken processing:
https://svn.apache.org/viewvc?view=revision&revision=924117 Dan On Friday 09 April 2010 9:50:45 am Daniel Kulp wrote: > My main "concern" with the implementation of this is that it's done as a > direct subclass of the WSS4JInInterceptor and thus not really usable by the > policy based endpoints as those interceptors subclass WSS4JInInterceptor as > well. > > I think the better approach may be to add a flag to wss4j (I can help > commit changes there if needed) to have it not do any UserName token > processing at all. (aside: this may be doable without changes to wss4j > by registering our own "do nothing processor") Then, have another > interceptor that runs after the WSS4JInInterceptor that would actually > handle the UsernameToken and verify anything it needs and such. > > To be honest, I WANT to do this for the Policy based stuff anyway. There > is currently some duplicated code between the > PolicyBasedWSS4JIinInterceptor and the new UsernameTokenInterceptor that > could be eliminated by having the PolicyBasedWSS4JIinInterceptor not do > UsernameTokens at all and delegate that completely to the > UsernameTokenInterceptor. > > Basically, it would be good if the WSS4JIn* stuff just handled the > encryption/signature stuff and then let the authorization validations stuff > to later interceptors. That would include things like key validation > checking and stuff as well. Probably SAML token validation as well. > > Dan > > On Thursday 08 April 2010 12:09:24 pm Sergey Beryozkin wrote: > > Hi David > > > > thanks for the comments... > > > > On Wed, Apr 7, 2010 at 9:41 PM, David Valeri <dval...@apache.org> wrote: > > > Sergey, > > > > > > I think this type of functionality would be very useful to a number of > > > folks. I have built two similar capabilities for clients very recently > > > using CXF and Spring Security. Based on the code provided below, I > > > have several points that I would like to see addressed in a solution. > > > > > > 1) Architecture to support more than just UsernameTokens. I have > > > worked with systems that need to authenticate a user using > > > UsernameTokens, BinarySecurityTokens, SAML Assertions, and a > > > combination of more than one of > > > these at a time. > > > > Supporting UsernameTokens is the initial requirement. At the moment I do > > not even know how BinarySecurityTokens or SAML Assertions are > > processed/validated in CXF or WSS4J. > > > > > For the most part, WSS4J simply validates the structural > > > details of security. That is, signature validity, trust chaining of > > > digital > > > certificates, etc. As Glen pointed out with his reference to > > > https://issues.apache.org/jira/browse/WSS-183, WSS4J sometimes performs > > > its > > > own password checking (authentication). Unfortunately, WSS4J doesn't > > > provide hooks for authenticating other forms of credentials that I have > > > listed above (I don't consider trust to be equivalent to > > > authentication). It would be best if the authentication interface > > > supported multiple credential types and allowed for authentication to > > > be performed in a single location in the same manner every time (not > > > sometimes in the WSS4J callback and sometimes in another interceptor > > > for non-UT based credentials). > > > > Makes sense. Assuming it is WSS4J which validates (the structure of) > > BinarySecurityTokens then > > AbstractWSS4JSecurityContextProvidingInterceptor can also implement a > > processor for BinarySecurityTokens and delegate to subclass to > > authenticate and setup a subject. Some extra methods will need to be > > added, to be optionally overridden. > > > > If it is not only WSS4J which is involved then perhaps another option is > > to store (from WSS4J callback handler, etc) relevant details such > > username token details, etc to be acted upon by other interceptors. > > > > > That > > > last bit there means disabling WSS4J's password authentication since it > > > gets > > > in the way of doing it later in our own interceptor. > > > > AbstractWSS4JSecurityContextProvidingInterceptor does it now by > > implementing a simplified UsernameTokenProcessor > > > > > 2) Allow for end-user flexibility in choosing the credentials they want > > > to authenticate. For instance, each user is going to have their own > > > security profiles and authentication requirements. For instance, a > > > message contains a UT for a portal user and a digital signature from > > > the portal (I know using > > > a SAML Assertion would be better here, but people still do it this > > > way). Each organization will have different requirements as to which > > > credentials get authenticated and what needs to end up in the security > > > context. > > > > I suppose AbstractWSS4JSecurityContextProvidingInterceptor subclasses > > should be able to do it, for username tokens and other tokens later on. > > > > > 3) Decouple the authentication interface from WSS4J. What is passed in > > > needs to be abstracted enough that it can work with other WS-Security > > > libraries as well. > > > > the only WSS4J class which is leaked at the moment is > > WSSecurityException. Perhaps we can come up later on with a different > > more generic approach which does not depend on WSS4J at all. As Dan > > indicated, in some cases WSS4JInInterceptor is not even used, so that > > case will need to be addressed. Experimenting wuth binary tokens might > > help with identifying another solution. > > > > > 4) It would be nice to be able to perform authorization using something > > > like > > > Spring Security at the service operation level. With a POJO or JAX-WS > > > based > > > service, one can just use Spring Security's method interceptor to > > > provide such security; however, in situations where one only has a > > > WSDL based service or a provider style service, a method interceptor > > > can't be used. > > > > > > It > > > > > > would be nice to provide a hook into Spring Security to allow end-users > > > to specify role based authorization policy based on a combination of > > > interface, > > > instance, and operation names. It seems like your > > > AbstractAuthorizingInterceptor and SimpleAuthorizingInterceptor are > > > looking in this direction, but I think it would be best if we can stand > > > on the shoulders of the Spring Security giant as much as possible so > > > that we can take advantage of their rich authorization manager, voter, > > > XML > > > configuration > > > capabilities. > > > > Not sure what to say here yet. But I think non-Spring users should be > > taken care of too. Or when simpler cases are dealt with then perhaps > > there's no need to bring in Spring security. Perhaps the utility > > authorization interceptors should just not be used when Spring Security > > is preferred ? > > > > > 5) Try not to leave the ServiceMix CXF-BC out in the cold. The CXF-BC > > > currently has a limited capability to select the credentials to > > > authenticate > > > and would benefit from 1 and 2 above. The CXF-BC ultimately delegates > > > authentication to the JBI container through a ServiceMix components > > > authentication service abstraction of JAAS. Whatever solution we have > > > for 1 > > > and 2 would help out the component if the ServiceMix authentication > > > service abstraction could be wired up in lieu of whatever we provide > > > out of the box. > > > > I'm not planning to contribute to ServiceMix. I agree though that an > > ideal solution will meet multiple requirements > > > > thanks, Sergey > > > > > -----Original Message----- > > > From: Sergey Beryozkin [mailto:sberyoz...@gmail.com] > > > Sent: Wednesday, April 07, 2010 10:11 AM > > > To: dev@cxf.apache.org > > > Subject: Using WS-Security UsernameToken to authenticate users and > > > populate SecurityContexts > > > > > > Hi > > > > > > I've been looking recently at extending the CXF WS-Security component > > > such that a current UsernameToken could be used by custom interceptors > > > to authenticate a user with the external security systems and, if > > > possible, provide enough information for CXF to populate a > > > SecurityContext [1] to be used later on for > > > authorization decisions. > > > > > > Here is the approach I've taken so far. > > > A custom interceptor extends > > > AbstractWSS4JSecurityContextProvidingInterceptor [2] and the only > > > method it overrides is > > > > > > abstract Subject createSubject(String name, String password, boolean > > > isDigest, > > > > > > String nonce, > > > String created) throws > > > > > > WSSecurityException; > > > > > > > > > For example, see [3]. > > > > > > The idea here is that a custom interceptor interfaces whichever way it > > > needs > > > to with the external system and populates a Subject following this > > > simple rule : first Subject principal is the current user (identified > > > by a 'name' argument), followed by one or more Groups this user is a > > > member of. AbstractWSS4JSecurityContextProvidingInterceptor will use > > > this Subject to provide a functional SecurityContext instance. > > > > > > This is the first part, next is how to utilize a SecurityContext and > > > get the > > > expected roles associated one way or the other with a current method to > > > be invoked. There's a number of usual options available here, perhaps > > > even SpringSecurity can be used now that SecurityContext is available, > > > or application code or other custom CXF interceptor can check the known > > > roles against SecurityContext. > > > > > > I've also added AbstractAuthorizingInInterceptor interceptor which > > > custom interceptors can override and return a list of expected roles > > > given a (service) Method to be invoked upon, > > > AbstractAuthorizingInInterceptor will then ask available > > > SecurityContext to match the roles; one concrete implementation is > > > SimpleAuthorizingInterceptor[5], it can be injected with a > > > method specific or class (applying to all methods) roles. Another > > > implementation which I will likely add later on will be injected with a > > > name > > > of annotation such as RolesAlloved and it will introspect a method and > > > its class. > > > > > > Note that I haven't looked into the case when a policy runtimes adds > > > the interceptors yet (as opposed to interceptors being configured form > > > Spring/programmatically). I think an optional contextual property will > > > need to be setup in such cases for users be able to indicate that say > > > an interceptor such as [3] has to be used as opposed to > > > WSS4JInInterceptor, etc. > > > > > > I'm going to validate this approach with JBoss CXF. If you have any > > > comments > > > then please let me know. > > > > > > I think we may have a simpler alternative eventually to the way > > > authorization decisions are made. [1]-[3] is specific to ws-security, > > > but [4]-[5] is not > > > > > > cheers, Sergey > > > > > > [1] https://issues.apache.org/jira/browse/CXF-2754 > > > [2] > > > > > > http://svn.apache.org/repos/asf/cxf/trunk/rt/ws/security/src/main/java/ > > > or g/a > > > > > > pache/cxf/ws/security/wss4j/AbstractWSS4JSecurityContextProvidingInterc > > > ep > > > tor<http://svn.apache.org/repos/asf/cxf/trunk/rt/ws/security/src/main/ > > > jav > > > a/org/a%0Apache/cxf/ws/security/wss4j/AbstractWSS4JSecurityContextProv > > > idi ngInterceptor> .java > > > [3] > > > > > > http://svn.apache.org/repos/asf/cxf/trunk/rt/ws/security/src/test/java/ > > > or g/a > > > pache/cxf/ws/security/wss4j/SimpleSubjectCreatingInterceptor.java<http: > > > / > > > /svn.apache.org/repos/asf/cxf/trunk/rt/ws/security/src/test/java/org/a > > > %0A pache/cxf/ws/security/wss4j/SimpleSubjectCreatingInterceptor.java> > > > [4] > > > > > > http://svn.apache.org/repos/asf/cxf/trunk/rt/core/src/main/java/org/apa > > > ch e/c > > > xf/interceptor/security/AbstractAuthorizingInInterceptor.java<http://sv > > > n > > > .apache.org/repos/asf/cxf/trunk/rt/core/src/main/java/org/apache/c%0Ax > > > f/i nterceptor/security/AbstractAuthorizingInInterceptor.java> [5] > > > > > > http://svn.apache.org/repos/asf/cxf/trunk/rt/core/src/main/java/org/apa > > > ch e/c > > > xf/interceptor/security/SimpleAuthorizingInterceptor.java<http://svn.ap > > > a > > > che.org/repos/asf/cxf/trunk/rt/core/src/main/java/org/apache/c%0Axf/in > > > ter ceptor/security/SimpleAuthorizingInterceptor.java> -- Daniel Kulp dk...@apache.org http://dankulp.com/blog
