[cifs-protocol] [EXTERNAL] Re: [MS-SAMR] AEAD-AES-256-CBC-HMAC-SHA512 - TrackingID#2206210040006850

Tue Jun 28 16:41:40 UTC 2022

Hi Andreas,

Can you not use the test data provided in the RFC [AEX-CBC] that you originally referenced? 

It appears to have all or most of what you're looking for: 
K (secret input key)
MAC_KEY
ENC_KEY
P (plaintext) 
IV (initialization vector)
A (associated data)
PS (padding string)
AL (associated data length)
S (ciphertext - intermediate)
T (authentication tag)
C (ciphertext)

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
We value your feedback.  My manager is Stacy Gray (stacygr), +1 (469) 775-4055

-----Original Message-----
From: Jeff McCashland (He/him) 
Sent: Monday, June 27, 2022 11:55 AM
To: Andreas Schneider <asn at samba.org>
Cc: cifs-protocol at lists.samba.org; Jeff McCashland <jeffm at microsoftsupport.com>; Obaid Farooqi <obaidf at microsoft.com>
Subject: RE: [EXTERNAL] Re: [MS-SAMR] AEAD-AES-256-CBC-HMAC-SHA512 - TrackingID#2206210040006850

Hi Andreas,

Our plan is to capture traffic where AEAD-AES-256-CBC-HMAC-SHA512 is used. 

We're working on setting up a Windows repro. However, Windows uses LDAP instead of SAMR, so we're working out how to configure it to use SAMR. 

I'll keep you posted. 

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 We value your feedback.  My manager is Stacy Gray (stacygr), +1 (469) 775-4055

-----Original Message-----
From: Andreas Schneider <asn at samba.org>
Sent: Monday, June 27, 2022 4:56 AM
To: Jeff McCashland (He/him) <jeffm at microsoft.com>
Cc: cifs-protocol at lists.samba.org; Jeff McCashland <jeffm at microsoftsupport.com>; Obaid Farooqi <obaidf at microsoft.com>
Subject: [EXTERNAL] Re: [MS-SAMR] AEAD-AES-256-CBC-HMAC-SHA512 - TrackingID#2206210040006850

On Wednesday, June 22, 2022 8:09:34 PM CEST Jeff McCashland (He/him) wrote:
> Hi Andreas,

Hi Jeff,

> I will research your question and see what we can come up with for 
> test data.

thank you very much. Looking forward to hear from you :-)

	Andreas

> 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%7Cb133cf48cfa147d4956b08da5833fc38%7C72f988bf86f141af91ab2d7cd011d
> b47%7C1%7C0%7C637919277699900369%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wL
> jAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&
> amp;sdata=%2BJdN4TiV%2Bvqq4dqYGpq7mGhZ1vh3gQrrvgjqsBuBXbg%3D&reser
> ved=0 | Extension
> 1138300 We value your feedback.  My manager is Stacy Gray (stacygr),
> +1
> (469) 775-4055
> 
> -----Original Message-----
> From: Obaid Farooqi <obaidf at microsoft.com>
> Sent: Tuesday, June 21, 2022 9:08 AM
> To: Andreas Schneider <asn at samba.org>
> Cc: cifs-protocol at lists.samba.org; Obaid Farooqi 
> <obaidf at microsoftsupport.com> Subject: [EXTERNAL] [MS-SAMR]
> AEAD-AES-256-CBC-HMAC-SHA512 - TrackingID#2206210040006850
> 
> Hi Andreas:
> Thanks for contacting Microsoft. I have created a case to track this issue.
> A member of the open specifications team will be in touch soon.
> 
> Regards,
> Obaid Farooqi
> Escalation Engineer | Microsoft
> 
> -----Original Message-----
> From: Andreas Schneider <asn at samba.org>
> Sent: Tuesday, June 21, 2022 8:00 AM
> To: Interoperability Documentation Help <dochelp at microsoft.com>
> Cc: cifs-protocol at lists.samba.org
> Subject: [EXTERNAL] [MS-SAMR] AEAD-AES-256-CBC-HMAC-SHA512
> 
> Hello Dochelp,
> 
> I'm trying to implement support for AEAD-AES-256-CBC-HMAC-SHA512 from
> [MS- SAMR] 3.2.2.4 AES Cipher Usage.
> 
> This is not really easy as there are some details unclear. I would 
> love to write a unit test for AEAD-AES-256-CBC-HMAC-SHA512.
> 
> Could you please provide hexdump of the buffers used in encryption 
> from a
> SamrSetInformationUser2 level 31 from a test platform.
> 
> When it performs the following:
> 
> Let enc_key ::= HMAC-SHA-512(CEK, SAM_AES256_ENC_KEY_STRING) Let 
> mac_key ::= HMAC-SHA-512(CEK, SAM_AES256_MAC_KEY_STRING) Let Cipher 
> ::= AES-CBC(enc_key, IV, secret_plaintext) Let AuthData ::= 
> HMAC-SHA-512(mac_key, versionbyte + IV + Cipher + versionbyte_length)
> 
> 
> I would like to have hexdumps of the following buffers:
> 
> * cek (16byte sesssion key)
> * enc_key
> * mac_key
> * IV
> * secret_plaintext
> * cipher
> * authdata
> 
> The RFC implementation provides something like that, see:
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftool
> s.ietf%2F&data=05%7C01%7Cjeffm%40microsoft.com%7Cb133cf48cfa147d49
> 56b08da5833fc38%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637919277
> 699900369%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIi
> LCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=ihsJ1PYjg2cT7
> 4D3zmlfdDV3UEVNtpJeOX%2BPWQYmg%2FI%3D&reserved=0
> .org%2Fid%2Fdraft-mcgrew-aead-aes-cbc-hmac-sha2-03.html%23rfc.section.
> 5.4&am
> p;data=05%7C01%7Cjeffm%40microsoft.com%7C382019859d9f4eb7cc1b08da53a03
> c24%7C
> 72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637914244951310820%7CUnknow
> n%7CTW
> FpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6
> Mn0%3D
> %7C3000%7C%7C%7C&sdata=jzVMJ8GS%2BP30uF6pHSTfJf8ioOzDOK69Y%2ByyFKD
> zpKo%3
> D&reserved=0
> 
> This would allow me to write a unit test and figure out the details 
> what in my implementation something goes wrong. I can then provide 
> feedback to improve the documentation.
> 
> 
> Thank you very much!
> 
> 
> Best regards
> 
> 
>         Andreas Schneider
> 
> 
> --
> Andreas Schneider                      asn at samba.org
> Samba Team                            
> https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.samba%2F&data=05%7C01%7Cjeffm%40microsoft.com%7Cb133cf48cfa147d4956b08da5833fc38%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637919277699900369%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Q04le03I8jml11uEltlzIssEEkpVMfFeHjDYdw2cPIU%3D&reserved=0.
> org%2F&data=05%7C01%7Cjeffm%40microsoft.com%7C382019859d9f4eb7cc1b
> 08da53
> a03c24%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637914244951310820
> %7CUnk
> nown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWw
> iLCJXV
> CI6Mn0%3D%7C3000%7C%7C%7C&sdata=0VU8ycMe9EFGOAEV7JROkmRRoQCDje5N%2FxAIbz
> qpbI4%3D&reserved=0 GPG-ID:     8DFF53E18F2ABC8D8F3C92237EE0FC4DCC014E3D

-- 
Andreas Schneider                      asn at samba.org
Samba Team                             https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.samba.org%2F&data=05%7C01%7Cjeffm%40microsoft.com%7Cb133cf48cfa147d4956b08da5833fc38%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637919277699900369%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=%2B765ffn57cwQ8e0bIfKTw1cGoYcX4jXUiZ0KQkjaVCM%3D&reserved=0
GPG-ID:     8DFF53E18F2ABC8D8F3C92237EE0FC4DCC014E3D