Hi Colm, Yes you’re right. The login module assumes some ones don’t want to touch the low level, but if otherwise like you, using the Kerby library directly should also work having the most flexibility.
>> How do I extract the token from SgtTicket that I can validate using GSS? Sorry, but where do you want to do this? App client side or server side? If on server side, I thought you have already made it, as your previous email notified, being able to query/extract the authorization data and get token from it. Would you clarify some bit? Regards, Kai From: Colm O hEigeartaigh [mailto:[email protected]] Sent: Thursday, June 23, 2016 7:59 PM To: Zheng, Kai <[email protected]> Cc: [email protected] Subject: Re: JWT pre-authentication - get JWT token on service side Hi Kai, On Wed, Jun 22, 2016 at 3:11 PM, Zheng, Kai <[email protected]<mailto:[email protected]>> wrote: Great question. Here what you need would be a login module using token, and the module will send the token to KDC for a TGT to get a SGT that's to be used in a GSS session. We have already the module, please look at TokenAuthLoginModule. From what I can see, the TokenAuthLoginModule just gets the TGT and not the SGT. However, I can get the service ticket easily enough via the Kerby API from this. How do I extract the token from SgtTicket that I can validate using GSS? Regards, Kai -----Original Message----- From: Colm O hEigeartaigh [mailto:[email protected]<mailto:[email protected]>] Sent: Wednesday, June 22, 2016 9:36 PM To: [email protected]<mailto:[email protected]> Subject: Re: JWT pre-authentication - get JWT token on service side Hi all, Some more questions on this task: 1) Kai, you mentioned the AuthzToken type. Is this defined somewhere so that I can add it in to the AuthorizationType class? 2) Currently, the TokenIssuer class asks the IdentityService for the authorization data. However, the IdentityService doesn't have access to the token. Is it reasonable default behaviour to insert the received token in the TokenIssuer as the authorization data, and if none exists fall back to ask the IdentityService for any authorization data? 3) I can extract the token on the service side using the GSS API in the way suggested by Kai. However, how can I send the token to the KDC on the client side using GSS? Thanks, Colm. On Fri, Jun 17, 2016 at 4:41 PM, Zheng, Kai <[email protected]<mailto:[email protected]>> wrote: > It's not a bug. It works that way, the temp value will be there only > after you have decode/decrypt the part. > > Note SGT is used/consumed in app server side, and can be decrypted > using the server ticket/key. I suggest you try this in the GssAppTest > codes using the example code I provided in my last email, where you > should be able to query/extract the authorization data. If you put the > token in the authorization data, then after decoding it, you could > extract token from it. I remembered we had defined the AuthzToken type > for this actually but guess it's not used yet. > > Regards, > Kai > > -----Original Message----- > From: Colm O hEigeartaigh > [mailto:[email protected]<mailto:[email protected]>] > Sent: Friday, June 17, 2016 7:21 PM > To: [email protected]<mailto:[email protected]> > Subject: Re: JWT pre-authentication - get JWT token on service side > > Thanks Kai and Jiajia! > > I'm trying to get access to the authorization data using the Kerby API > after getting a service ticket: > > SgtTicket tkt = tokenClient.requestSgt(krbToken, serverPrinc, > cCacheFile.getPath()); > > However the following is null: > > tkt.getTicket().getEncPart() > > Is this a bug or how else can I parse the ticket to get the > authorization data? > > Colm. > > On Thu, Jun 16, 2016 at 1:01 PM, Zheng, Kai > <[email protected]<mailto:[email protected]>> wrote: > > > Thanks Jiajia for the first question! > > > > For the second one, since you're using GSS the even lower level, > > which is more fine, and should be totally doable. Ref. the following doc: > > > > https://docs.oracle.com/javase/7/docs/jre/api/security/jgss/spec/com > > /s un/security/jgss/ExtendedGSSContext.html > > > > GSSContext ctxt = m.createContext(...) > > // Establishing the context > > if (ctxt instanceof ExtendedGSSContext) { > > ExtendedGSSContext ex = (ExtendedGSSContext)ctxt; > > try { > > Key key = (key)ex.inquireSecContext( > > InquireType.KRB5_GET_SESSION_KEY); > > // read key info > > } catch (GSSException gsse) { > > // deal with exception > > } > > } > > > > As you can see after established the GSS context, you can query the > > SESSION_KEY from the layer. You can also query AUTHZ_DATA field > similarly! > > After you get authz data, it's up to you to decode it, say using > > Kerby library to decode the ASN1 object and extract any info in it > > like the > token. > > > > Regards, > > Kai > > > > -----Original Message----- > > From: Li, Jiajia [mailto:[email protected]<mailto:[email protected]>] > > Sent: Thursday, June 16, 2016 7:50 PM > > To: [email protected]<mailto:[email protected]>; > > [email protected]<mailto:[email protected]> > > Subject: RE: JWT pre-authentication - get JWT token on service side > > > > Hi Colm, > > > > For the first question: I think now the token has not been put into > > the issued service ticket as authorization data. You can look at > > issueTicket()#TgsRequest.java in server side for detail. > > > > Regards, > > Jiajia > > > > -----Original Message----- > > From: Colm O hEigeartaigh > > [mailto:[email protected]<mailto:[email protected]>] > > Sent: Thursday, June 16, 2016 7:19 PM > > To: [email protected]<mailto:[email protected]> > > Subject: Re: JWT pre-authentication - get JWT token on service side > > > > Thanks Kai. A few questions below. > > > > On Thu, Jun 16, 2016 at 11:33 AM, Zheng, Kai > > <[email protected]<mailto:[email protected]>> > wrote: > > > > > > > > 1. For issuing service ticket, the token used to do the > > > authentication or a token derivation was put into the issued > > > service ticket as authorization data. I'm not sure in current > > > Kerby impl, it has done this or not. If not, it should be not > > > difficult to support it, considering we have some Kerby authorization > > > support now. > > > > > > > I can take a look at this. Can you give me some pointers in the code > > so that I know where to start? > > > > > > > > > > 2. In application server side, it should be able to query and > > > extract out the token encapsulated in the authorization data field > > > in the service ticket. This should be doable now, because a > > > proposal from me quite some ago had already been accepted by > > > Oracle Java, as recorded in the following ticket, though I hadn't > > > got the chance to verify it using latest JDK update like JDK8. > > > > > > JDK-8044085, our extension proposal accepted and committed: > > > allowing querying authorization data field of service ticket. > > > https://bugs.openjdk.java.net/browse/JDK-8044085 > > > > > > The JDK service ticket only refers to SASL. If I'm just using GSS on > > the service side, is it already supported? If so, how can I extract it? > > > > Colm. > > > > > > > > > > > > > So in summary, if you want to try this, I would suggest please go > > > ahead since it's doable now. Please let me know if you have other > > questions. > > > > > > Regards, > > > Kai > > > > > > -----Original Message----- > > > From: Colm O hEigeartaigh > > > [mailto:[email protected]<mailto:[email protected]>] > > > Sent: Thursday, June 16, 2016 5:54 PM > > > To: [email protected]<mailto:[email protected]> > > > Subject: JWT pre-authentication - get JWT token on service side > > > > > > Hi all, > > > > > > For the JWT pre-authentication use-case, how can I get access to > > > the token information on the service side? > > > > > > From the documentation: "The service authenticates the ticket, > > > extracts the token derivation, then enforce any advanced > > > authorization by employing the token derivation and token attributes" > > > > > > Is there an example in the code to look at? > > > > > > Colm. > > > > > > > > > -- > > > Colm O hEigeartaigh > > > > > > Talend Community Coder > > > http://coders.talend.com > > > > > > > > > > > -- > > Colm O hEigeartaigh > > > > Talend Community Coder > > http://coders.talend.com > > > > > > -- > Colm O hEigeartaigh > > Talend Community Coder > http://coders.talend.com > -- Colm O hEigeartaigh Talend Community Coder http://coders.talend.com -- Colm O hEigeartaigh Talend Community Coder http://coders.talend.com
