Hi Jamil, We made an effort to support SHA2 where we can but might have missed a few places. I'll look into this and hopefully be able to get back to you in a few days. thanks, Christina On 09/19/2012 12:44 AM, Nimeh, Jamil wrote: > > Hello Dogtag Gurus, > > I have been trying to issue CMC revocation messages signed with > SHA-256, but the server fails to validate the message in the CMCAuth > java policy module. If I leave all fields the same but change the > signature algorithm to SHA-1 then everything seems to work fine. > > I suspect this is another side-effect of the root-cause for bug > 824624. It seems like in certain cases with JSS 4.2.6 when PKCS#7 > messages are created using any of the SHA-2 variants, the OIDs get > messed up. This happened with SCEP responses from the CA (the bug > referenced above) and I had it happen with the CMC revoke > modifications I made. The latter issue was fixed by pulling down JSS > 4.3 and loading that jar in the classpath for the modified CMCRevoke > tool. However, on the server side I ended up seeing verification > failures. > > I'm running pki-common-9.0.20, jss 4.2.6, and NSS 3.13.4. At one > point I had heard that Dogtag 9.0.X wasn't 100% safe to run with JSS > 4.3 or later. Is that still the case with the latest 9.0 packages? > > > Has anyone had any success generating these CMC messages using SHA-2 > hash algs and getting Dogtag to accept them? > > > Thanks, > > Jamil > > > _______________________________________________ > Pki-users mailing list > Pki-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/pki-users _______________________________________________ Pki-users mailing list Pki-users(a)redhat.com https://www.redhat.com/mailman/listinfo/pki-users

Hi Jamil, I am running a variant of jss-4.2.6-23 (with one extra patch that I have not had time to push/build, but it has nothing to do with your suspected area). For nss, I'm running nss-3.13.5-8.el5. Again, I develop on RHEL. Yes, if you'd send in your code with precise reproducing steps, I might be able to look into it sooner. Christina On 09/25/2012 11:10 PM, Nimeh, Jamil wrote: > Hi Christina, thank you very much for getting back to me. > > I haven't seen the problem with the PKCS#1 SHA-256 with RSA OID. > That seems to work across the board with JSS and Dogtag (otherwise I > could never sign a cert with SHA-256, I suppose). I'd be curious to > know what version of JSS is on your RHEL/RHCS8.1 machine, and perhaps > what NSS version. On my Fedora box it's JSS 4.2.6 and NSS 3.13.4. > Maybe something different between the bits we're running? > > I've run into the issue when a PKCS#7 or CMS signedData message is > created. In those cases, the SHA-256 OID would normally be asserted > in two locations: > 1. In the DigestAlgorithmIdentifiers segment of the SignedData object > (see RFC 5652 5.1): CMS/PKCS#7 objects have it properly asserted here. > > 2. In the DigestAlgorithmIdentifier portion of the SignerInfo (see > RFC 5652 5.3): This is where the OID gets messed up with SHA-2 algs. > Since there is only one signer, the DigestAlgorithmIdentifiers > section at the beginning would have only one OID, the SHA-256 one, > and that OID should be repeated again in the SignerInfo. > > What happens though is that the SignerInfo's > DigestAlgorithmIdentifier will show up with an OID of > 2.16.840.1.101.3.4.1 when it should be 2.16.840.1.101.3.4.2.1. This > appears to happen with JSS 4.2.6, but not with JSS 4.3. But 4.2.6 is > what comes down when the dogtag packages are pulled with yum, so I > wasn't sure if I could pop in a newer JSS safely. > > Tomorrow I'll take my doctored up CMCRevoke and cook up two messages, > one where I load the 4.2.6 JSS and one where I do 4.3 and I'll send > you the DER encodings so you can see what I'm talking about. I don't > recall, but I think the bug report for 824624 might have sample SCEP > CertRep messages from the CA, which show the issue using PKCS#7. > > Once again, thank you very much for taking the time to look at this. > > --Jamil > > ------------------------------------------------------------------------ > *From:* pki-users-bounces(a)redhat.com [pki-users-bounces(a)redhat.com] > on behalf of Christina Fu [cfu(a)redhat.com] > *Sent:* Tuesday, September 25, 2012 8:46 PM > *To:* pki-users(a)redhat.com > *Subject:* Re: [Pki-users] SHA-256 signed CMC revocation messages > failing to verify on server > > Hi Jamil, > > I tried to reproduce your issue, but I seemed to be able to generate > CMC revocation request with SHA-256 digest. I have to admit that my > main development machine is RHEL and I work on RHCS8.1 tree. > > I changed all "SHA1" to "SHA256" in CMCRevoke.java (with the > exception with DSA), compiled, and it just worked. Did you do > anything different? > > I could see in dumpasn1 where SHA245 is in place: > C-Sequence (13) > Object Identifier (9) > 1 2 840 113549 1 1 11 (PKCS #1 SHA-256 With RSA Encryption) > NULL (0) > Christina > > On 09/19/2012 11:19 AM, Christina Fu wrote: >> Hi Jamil, >> >> We made an effort to support SHA2 where we can but might have missed >> a few places. I'll look into this and hopefully be able to get back >> to you in a few days. >> >> thanks, >> Christina >> >> On 09/19/2012 12:44 AM, Nimeh, Jamil wrote: >>> >>> Hello Dogtag Gurus, >>> >>> I have been trying to issue CMC revocation messages signed with >>> SHA-256, but the server fails to validate the message in the >>> CMCAuth java policy module. If I leave all fields the same but >>> change the signature algorithm to SHA-1 then everything seems to >>> work fine. >>> >>> I suspect this is another side-effect of the root-cause for bug >>> 824624. It seems like in certain cases with JSS 4.2.6 when PKCS#7 >>> messages are created using any of the SHA-2 variants, the OIDs get >>> messed up. This happened with SCEP responses from the CA (the bug >>> referenced above) and I had it happen with the CMC revoke >>> modifications I made. The latter issue was fixed by pulling down >>> JSS 4.3 and loading that jar in the classpath for the modified >>> CMCRevoke tool. However, on the server side I ended up seeing >>> verification failures. >>> >>> I'm running pki-common-9.0.20, jss 4.2.6, and NSS 3.13.4. At one >>> point I had heard that Dogtag 9.0.X wasn't 100% safe to run with >>> JSS 4.3 or later. Is that still the case with the latest 9.0 packages? >>> >>> >>> Has anyone had any success generating these CMC messages using >>> SHA-2 hash algs and getting Dogtag to accept them? >>> >>> >>> Thanks, >>> >>> Jamil >>> >>> >>> _______________________________________________ >>> Pki-users mailing list >>> Pki-users(a)redhat.com >>> https://www.redhat.com/mailman/listinfo/pki-users >> >> >> _______________________________________________ >> Pki-users mailing list >> Pki-users(a)redhat.com >> https://www.redhat.com/mailman/listinfo/pki-users > _______________________________________________ Pki-users mailing list Pki-users(a)redhat.com https://www.redhat.com/mailman/listinfo/pki-users