[cifs-protocol] [EXTERNAL] Re: [MS-KILE] Certificate strings - but nothing is said as to how these strings are to be derived from the client’s certificate - TrackingID#2308180010001826
Jeff McCashland (He/him)
jeffm at microsoft.com
Tue Sep 19 17:15:14 UTC 2023
Hi Joseph,
What I've been able to determine so far is that pCertificateStringsArray is a set of OIDs of msDS-ClaimSource attribute. Hopefully this helps.
I'll let you know if I discover more information.
Best regards,
Jeff McCashland (He/him) | Senior Escalation Engineer | Microsoft Protocol Open Specifications Team
Phone: +1 (425) 703-8300 x38300 | Hours: 9am-5pm | Time zone: (UTC-08:00) Pacific Time (US and Canada)
Local country phone number found here: http://support.microsoft.com/globalenglish | Extension 1138300
-----Original Message-----
From: Jeff McCashland (He/him)
Sent: Wednesday, August 23, 2023 3:52 PM
To: Joseph Sutton <jsutton at samba.org>; cifs-protocol at lists.samba.org
Cc: Microsoft Support <supportmail at microsoft.com>
Subject: RE: [EXTERNAL] Re: [MS-KILE] Certificate strings - but nothing is said as to how these strings are to be derived from the client’s certificate - TrackingID#2308180010001826
Hi Joseph,
Thank you for your fast response. I will analyze the traces and let you know what I find.
Best regards,
Jeff McCashland (He/him) | Senior Escalation Engineer | Microsoft Protocol Open Specifications Team
Phone: +1 (425) 703-8300 x38300 | Hours: 9am-5pm | Time zone: (UTC-08:00) Pacific Time (US and Canada) Local country phone number found here: http://support.microsoft.com/globalenglish | Extension 1138300
-----Original Message-----
From: Joseph Sutton <jsutton at samba.org>
Sent: Wednesday, August 23, 2023 3:44 PM
To: Jeff McCashland (He/him) <jeffm at microsoft.com>; cifs-protocol at lists.samba.org
Cc: Microsoft Support <supportmail at microsoft.com>
Subject: Re: [EXTERNAL] Re: [MS-KILE] Certificate strings - but nothing is said as to how these strings are to be derived from the client’s certificate - TrackingID#2308180010001826
[You don't often get email from jsutton at samba.org. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ]
Hi,
I have uploaded a TTD trace and a network trace. The PKINIT AS-REQ I’m interested in should be the final AS-REQ that appears in the network trace.
Regards,
Joseph
On 24/08/23 8:53 am, Jeff McCashland (He/him) wrote:
> Hi Joseph,
>
> That configuration is quite complex in Windows. I think it would be best to collect a TTT trace from your attempted repro. This will allow me to debug into where the PAC is being populated so I can determine what is needed in the Unicode string array. Please collect and upload an LSASS TTT trace and concurrent network trace from your Windows Server where the AS Req is processed.
>
> The LSASS traces can be quite large, but are highly compressible, so please add them to a .zip archive before uploading (file transfer workspace credentials are below). Please log into the workspace and find PartnerTTDRecorder_x86_x64.zip available for download. The x64 tool can be staged onto the Windows server in any location (instructions below assume C:\TTD).
>
> To collect the needed traces:
> 1. From an elevated command prompt, run "tasklist /FI "IMAGENAME eq lsass.exe" and note the PID number
> 2. Run the command (using the PID from step 1): "C:\TTD\TTTracer.exe -attach [PID]"
> 3. From a PowerShell prompt, execute:
> C:\TTD\tttracer.exe -Attach ([int](Get-Process -NAME lsass | Format-Wide -Property ID).formatEntryInfo.formatPropertyField.propertyValue)
> 4. Wait for a little window to pop up in top left corner of your screen, titled “lsass01.run”
> 5. start a network trace using netsh or WireShark, etc.
> 6. Repro the attempted operation
> 7. Stop the network trace and save it
> 8. CAREFULLY: uncheck the checkbox next to “Tracing” in the small “lsass01.run” window. Do not close or exit the small window or you will need to reboot.
> 9. The TTTracer.exe process will generate a trace file, then print out the name and location of the file.
> Compress the *.run file into a .zip archive before uploading with the matching network trace. It is a good idea to reboot the machine at the next opportunity to restart the lsass process.
>
> Workspace information:
> Log in as: 2308180010001826_joseph at dtmxfer.onmicrosoft.com
> 1-time: xU1GQ+f1
>
> Workspace link:
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsupp
> ort.microsoft.com%2Ffiles%3Fworkspace%3DeyJ0eXAiOiJKV1QiLCJhbGciOiJSUz
> I1NiJ9.eyJ3c2lkIjoiOWY3ZDY3ODMtNjBhOC00OGE0LTk3MTctNDUzYzY2ZDQxYTJiIiw
> ic3IiOiIyMzA4MTgwMDEwMDAxODI2IiwiYXBwaWQiOiI0ZTc2ODkxZC04NDUwLTRlNWUtY
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> xODMyMDRlMi04ZjJkLTRjZTQtOTY0Zi1hYzIyMzVlOThjNzEiLCJpc3MiOiJodHRwczovL
> 2FwaS5kdG1uZWJ1bGEubWljcm9zb2Z0LmNvbSIsImF1ZCI6Imh0dHA6Ly9zbWMiLCJleHA
> iOjE3MDA1OTkxODcsIm5iZiI6MTY5MjgyMzE4N30.b4P9cxG8t-JSihx9aIIOuDgjJun4S
> 3Jfi_k6POc8VIUHBGMKelPAUligjBRVVTJ5AeRL3BLfKcbWy43C2gT8oZfH2lchMznB4az
> BN0Rnum5uDBCtk5p3mtWiDiFTMuezuef5yjqx-qP_WTG5JjBrueN8EFM9LFaHqiwK39KF_
> ysUGWfuKC4yGn5i_VI9QcRH12zdEifbNG3oHcA0Sdc7ke9Oq0MzHPvTI_jIPRoKmU235pt
> LHCH9zPznKnri4GigHIDC_-sq-H2czKio2-4CVcRtxIe5MHo8zy7u16lePsMFORGYL9Mv7
> y4U35QQ-VH6ha6PhgAH9aynO2tmTdCtqg%26wid%3D9f7d6783-60a8-48a4-9717-453c
> 66d41a2b&data=05%7C01%7Cjeffm%40microsoft.com%7C0b1be9ac901a4abb3aec08
> dba42a827f%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C63828427472544
> 8580%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBT
> iI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=c5XPHYjQ4ShzE5Vffphy9k
> WkMI2FqECMz125Z9aC8cE%3D&reserved=0
>
> Best regards,
> Jeff McCashland (He/him) | Senior Escalation Engineer | Microsoft
> Protocol Open Specifications Team
> Phone: +1 (425) 703-8300 x38300 | Hours: 9am-5pm | Time zone:
> (UTC-08:00) Pacific Time (US and Canada) Local country phone number
> found here:
> https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fsuppo
> rt.microsoft.com%2Fglobalenglish&data=05%7C01%7Cjeffm%40microsoft.com%
> 7C0b1be9ac901a4abb3aec08dba42a827f%7C72f988bf86f141af91ab2d7cd011db47%
> 7C1%7C0%7C638284274725448580%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM
> DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdat
> a=jAZ7o8ItUpVZZpFiXlHxEtutPG%2FsdCZK2EoCbsVZAUc%3D&reserved=0 |
> Extension 1138300
>
> -----Original Message-----
> From: Jeff McCashland (He/him)
> Sent: Tuesday, August 22, 2023 2:25 PM
> To: Joseph Sutton <jsutton at samba.org>; cifs-protocol at lists.samba.org
> Cc: Microsoft Support <supportmail at microsoft.com>
> Subject: RE: [EXTERNAL] Re: [MS-KILE] Certificate strings - but
> nothing is said as to how these strings are to be derived from the
> client’s certificate - TrackingID#2308180010001826
>
> Hi Joseph,
>
> Thank you for the information.
>
> It appears the certificate strings array needs to contain the msDS-ClaimSource that you mentioned, which may have values such as 'AD', 'Certificate', or 'TransformPolicy'.
>
> I will see what more I can find out.
>
> Best regards,
> Jeff McCashland (He/him) | Senior Escalation Engineer | Microsoft
> Protocol Open Specifications Team
> Phone: +1 (425) 703-8300 x38300 | Hours: 9am-5pm | Time zone:
> (UTC-08:00) Pacific Time (US and Canada) Local country phone number
> found here:
> https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fsuppo
> rt.microsoft.com%2Fglobalenglish&data=05%7C01%7Cjeffm%40microsoft.com%
> 7C0b1be9ac901a4abb3aec08dba42a827f%7C72f988bf86f141af91ab2d7cd011db47%
> 7C1%7C0%7C638284274725448580%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM
> DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdat
> a=jAZ7o8ItUpVZZpFiXlHxEtutPG%2FsdCZK2EoCbsVZAUc%3D&reserved=0 |
> Extension 1138300
>
> -----Original Message-----
> From: Joseph Sutton <jsutton at samba.org>
> Sent: Monday, August 21, 2023 11:30 PM
> To: Jeff McCashland (He/him) <jeffm at microsoft.com>;
> cifs-protocol at lists.samba.org
> Cc: Microsoft Support <supportmail at microsoft.com>
> Subject: [EXTERNAL] Re: [MS-KILE] Certificate strings - but nothing is
> said as to how these strings are to be derived from the client’s
> certificate - TrackingID#2308180010001826
>
> [You don't often get email from jsutton at samba.org. Learn why this is
> important at https://aka.ms/LearnAboutSenderIdentification ]
>
> Hi,
>
> I have not managed to have Windows generate these certificate strings myself, but I imagine the procedure looks something like the following.
>
> First, create a claim type like so:
>
> dn: CN=ExampleClaim,CN=Claim Types,CN=Claims
> Configuration,CN=Services,CN=Configuration,DC=example,DC=com
> changetype: add
> objectClass: msDS-ClaimType
> Enabled: TRUE
> msDS-ClaimIsSingleValued: TRUE
> msDS-ClaimSource: (what value should this have? — see below.)
> msDS-ClaimSourceType: Certificate
> msDS-ClaimTypeAppliesToClass:
> CN=User,CN=Schema,CN=Configuration,DC=example,DC=com
> msDS-ClaimTypeAppliesToClass:
> CN=Computer,CN=Schema,CN=Configuration,DC=example,DC=com
> msDS-ClaimValueType: 6
>
> Then, having installed and set up Certificate Services on the Windows server, perform a Kerberos AS-REQ using PKINIT. If the KDC generates the certificate strings as specified in [MS-ADTS], the claim ought now to be in the PAC_CLIENT_CLAIMS_INFO PAC buffer in the TGT. More pertinently (from an end user’s perspective), with the claim in the PAC we should be authorized to access resources requiring possession of said claim.
>
> I’ve followed these steps as far as making the Kerberos AS-REQ.
>
> The part of all this that I’m quite uncertain about is how to set the
> attribute “msDS-ClaimSource”. According to the documentation for
> GetCertificateSourcedClaims() ([MS-ADTS] section 3.1.1.11.2.3), a certificate-sourced claim will be issued only if this attribute matches one of the certificate strings. But, as of yet, I haven’t been able to discover what value this attribute should hold for that to happen, not knowing how the certificate strings are derived. That’s what I’m ultimately trying to find out.
>
> Regards,
> Joseph
>
> On 22/08/23 6:23 am, Jeff McCashland (He/him) wrote:
>> Hi Joseph,
>>
>> I think I will need to do some debugging to find the answer to your question. Do you have a use case or scenario that would use this mechanism? Can you suggest a configuration and repro steps I can use to generate the exchange?
>>
>> Best regards,
>> Jeff McCashland (He/him) | Senior Escalation Engineer | Microsoft
>> Protocol Open Specifications Team
>> Phone: +1 (425) 703-8300 x38300 | Hours: 9am-5pm | Time zone:
>> (UTC-08:00) Pacific Time (US and Canada) Local country phone number
>> found here:
>> https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fsupp
>> o%2F&data=05%7C01%7Cjeffm%40microsoft.com%7C0b1be9ac901a4abb3aec08dba
>> 42a827f%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C6382842747254485
>> 80%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTi
>> I6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=r02tETufnbF8nvwGQkwPR%
>> 2FO1NOlLdYAM1cXgBrnFG58%3D&reserved=0
>> rt.microsoft.com%2Fglobalenglish&data=05%7C01%7Cjeffm%40microsoft.com
>> %
>> 7C5a06ba8e5597421a203a08dba2d94bcd%7C72f988bf86f141af91ab2d7cd011db47
>> %
>> 7C1%7C0%7C638282826407736325%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAw
>> M
>> DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sda
>> t
>> a=tVzSZdkLQwee9MFR%2Foz07SNAVeQS%2BWj6r6etmXaLddE%3D&reserved=0 |
>> Extension 1138300
>>
>> -----Original Message-----
>> From: Jeff McCashland (He/him)
>> Sent: Friday, August 18, 2023 9:52 AM
>> To: Joseph Sutton <jsutton at samba.org>; cifs-protocol at lists.samba.org
>> Cc: Microsoft Support <supportmail at microsoft.com>
>> Subject: RE: [MS-KILE] Certificate strings - but nothing is said as
>> to how these strings are to be derived from the client’s certificate
>> -
>> TrackingID#2308180010001826
>>
>> [HC to BCC]
>>
>> Hi Joseph,
>>
>> I will research your question and let you know what I find.
>>
>> Best regards,
>> Jeff McCashland (He/him) | Senior Escalation Engineer | Microsoft
>> Protocol Open Specifications Team
>> Phone: +1 (425) 703-8300 x38300 | Hours: 9am-5pm | Time zone:
>> (UTC-08:00) Pacific Time (US and Canada) Local country phone number
>> found here:
>> https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fsupp
>> o%2F&data=05%7C01%7Cjeffm%40microsoft.com%7C0b1be9ac901a4abb3aec08dba
>> 42a827f%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C6382842747254485
>> 80%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTi
>> I6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=r02tETufnbF8nvwGQkwPR%
>> 2FO1NOlLdYAM1cXgBrnFG58%3D&reserved=0
>> rt.microsoft.com%2Fglobalenglish&data=05%7C01%7Cjeffm%40microsoft.com
>> %
>> 7C5a06ba8e5597421a203a08dba2d94bcd%7C72f988bf86f141af91ab2d7cd011db47
>> %
>> 7C1%7C0%7C638282826407736325%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAw
>> M
>> DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sda
>> t
>> a=tVzSZdkLQwee9MFR%2Foz07SNAVeQS%2BWj6r6etmXaLddE%3D&reserved=0 |
>> Extension 1138300
>>
>> -----Original Message-----
>> From: Hung-Chun Yu <HungChun.Yu at microsoft.com>
>> Sent: Thursday, August 17, 2023 9:44 PM
>> To: Joseph Sutton <jsutton at samba.org>; cifs-protocol at lists.samba.org
>> Cc: Microsoft Support <supportmail at microsoft.com>; Hung-Chun Yu
>> <HungChun.Yu at microsoft.com>
>> Subject: [MS-KILE] Certificate strings - but nothing is said as to
>> how these strings are to be derived from the client’s certificate -
>> TrackingID#2308180010001826
>>
>> [bcc dochelp]
>> Hi Joseph
>>
>> Thank you for contacting Protocol Support. We created SR Case - TrackingID#2308180010001826. Do leave this tag in the subject line for future references.
>> One of our engineers will be contacting you shortly.
>>
>> Hung-Chun Yu
>> hunyu at microsoft.com
>>
>> -----Original Message-----
>> From: Joseph Sutton <jsutton at samba.org>
>> Sent: Thursday, August 17, 2023 7:26 PM
>> To: cifs-protocol at lists.samba.org; Interoperability Documentation
>> Help <dochelp at microsoft.com>
>> Subject: [EXTERNAL] [MS-KILE] Certificate strings
>>
>> [Some people who received this message don't often get email from
>> jsutton at samba.org. Learn why this is important at
>> https://aka.ms/LearnAboutSenderIdentification ]
>>
>> Hi dochelp,
>>
>> [MS-KILE] 3.3.5.6.4.6, “PAC_CLIENT_CLAIMS_INFO Structure”, mentions that the KDC should call GetClaimsForPrincipal() to get the claims blob with which to populate the PAC_CLIENT_CLAIMS_INFO structure. One of the parameters to GetClaimsForPrincipal(), namely “pCertificateStringsArray”, comprises “[a] set of Unicode strings”, but nothing is said as to how these strings are to be derived from the client’s certificate.
>>
>> Can you outline the procedure by which these strings are formed, and perhaps provide an example of such a string?
>>
>> Regards,
>> Joseph
>>
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