[squid-users] Re: Re: Re: squid 3.1.14 kerberos single sign on

Hi Ming,

  That looks correct. I have three suggestions:

 1) Can you reset the AD account password for the squid user and re-extract
the keytab ?
 2) Use another tool like msktutil (see
http://wiki.squid-cache.org/ConfigExamples/Authenticate/Kerberos )
 3) Clear the kerberos cache on the client with kerbtray. It might be that
the client cached an old key.

  Additionally if you want to support Win 7 and Win 2008 you must use
RC4-HMAC encryption as DES has been declared as a weak encryption method and
is not anymore supported in Win 7 / Win 2008.

Regards
Markus

"Ming Fu" <Ming.Fu_at_watchguard.com> wrote in message
news:09177155B3E82945AD8AF1F744B326458A7E5EA6_at_es05co...
Hi Markus,

My keytab file is generated from the win 2003 DC using ktpass command.

On Liunx where the squid is running:

klist -ekt /usr/local/squid/etc/squid27.keytab
Keytab name: WRFILE:/usr/local/squid/etc/squid27.keytab
KVNO Timestamp Principal
---- ----------------- --------------------------------------------------------
   9 12/31/69 19:00:00 HTTP/squid.sit27.borderware.com_at_SIT27.BORDERWARE.COM
(DES cbc mode with RSA-MD5)
[root_at_squid etc]# ^C
[root_at_squid etc]# echo $KRB5_KTNAME
/usr/local/squid/etc/squid27.keytab

On windows 2003
C:\Documents and Settings\Administrator>ktpass -princ
HTTP/squid.sit27.borderwar
e.com_at_SIT27.BORDERWARE.COM -mapuser squid -crypto DES-CBC-MD5 +DesOnly -pass
xxxxxxxx
 -ptype KRB5_NT_PRINCIPAL -out squid27.keytab
Targeting domain controller: 27dc.sit27.borderware.com
Using legacy password setting method
Successfully mapped HTTP/squid.sit27.borderware.com to squid.
Key created.
Output keytab to squid27.keytab:
Keytab version: 0x502
keysize 79 HTTP/squid.sit27.borderware.com_at_SIT27.BORDERWARE.COM ptype 1
(KRB5_NT
_PRINCIPAL) vno 9 etype 0x3 (DES-CBC-MD5) keylength 8 (0x10bf6eea2531436b)
Account squid has been set for DES-only encryption.

C:\Documents and Settings\Administrator>setspn -L squid
Registered ServicePrincipalNames for
CN=Squid,CN=Users,DC=sit27,DC=borderware,DC
=com:
    HTTP/squid.sit27.borderware.com

Best Regards,
Ming

> -----Original Message-----
> From: Markus Moeller [mailto:huaraz_at_moeller.plus.com]
> Sent: Thursday, July 28, 2011 3:09 PM
> To: squid-users_at_squid-cache.org
> Subject: [squid-users] Re: Re: squid 3.1.14 kerberos single sign on
>
> Hi Ming,
>
> This indicates that now your client got the ticket from AD, but it
> does
> not match the entry in your keytab. Did you set the environment variable
> KRB5_KTNAME correctly ? Can you do a klist -ekt <squid.keytab> and
> compare
> the entries with the wireshark information of the encoded HTTP Negotiate
> request ?
>
> Does the name, encryption type and , key version number (kvno) match ?
>
> Markus
>
> "Ming Fu" <Ming.Fu_at_watchguard.com> wrote in message
> news:09177155B3E82945AD8AF1F744B326458A7E58B8_at_es05co...
> Hi Markus,
>
> I tried the same test on a Windows 2003 domain with XP clients. I was
> able
> to get pass the SGT from DC to the XP. Now my problem is the following
> squid
> error: Any suggestion how to debug further?
>
> 2011/07/28 13:13:46| squid_kerb_auth: DEBUG: Got 'YR
> YIIEzQYGKwYBBQUCoIIEwTCCBL2gJDAiBgkqhkiC9xIBAgIGCSqGSIb3EgECAgYKKwYBBAGC
> NwICCqKCBJMEggSPYIIEiwYJKoZIhvcSAQICAQBuggR6MIIEdqADAgEFoQMCAQ6iBwMFACAA
> AACjggOeYYIDmjCCA5agAwIBBaEWGxRTSVQyNy5CT1JERVJXQVJFLkNPTaItMCugAwIBAqEk
> MCIbBEhUVFAbGnNxdWlkLnNpdDI3LmJvcmRlcndhcmUuY29to4IDRjCCA0KgAwIBA6EDAgEE
> ooIDNASCAzDb2BHDS95lmejMm5kGJNuwxcAV6OAOcH1hnOdb8sTR1nHSGGlvlbSKSg/G9l+a
> kRgv9t9BNrsECoZYlZBsojRnFCVHSKjRCKYn+K3ExFIT8E5Szu+XuyIQvib9RMNPG5poBHC4
> haBO9gxrkZ+yoPOhIP3lY4o9RltyumIAEPiO+36kqNSnTHu6ycuzImPA7+jlkU8VFyXHiwgr
> HNX7/1N5hpQWuIxl+UkvSJzZb/Tdoro4nM53id0ZrSdxs+Dn1WESc3EgZRwjItGNPHzPKeB0
> 3v8IIFZkSCQSGp+GxUeOzxRpMzXN2r3T6PLFLlMHJQeJzFnCOnmJs4stiyW6rY7zF3L868OH
> Yhcx9kUZQzUivnwI+lrfRYMlu87CbAnPZBbPc099b0Amp5gF2YlSOOpx2fLdIN2hs5GJCnzB
> K1Z7sGPiIIi2hWfbhAJMvAE8sLnahlD8ffraI3ZrxKfpVnNIxbJMvkq4pA8/Ka2w2DA1jeEc
> PkOg1oggA6+ygmvHZpQrU9twBTtjfHxi0050gdv/DbEbsHofFFDlLNCkQQYB50aDCOubu3Nf
> qfNGre/EAJyrfmeRfjTNRtcOfauoUlZmVhqJXM0nkuvlDtvCXcUmjvcVwtG6CE13lqAsD081
> xJPaLnPAKmmqGVZUZNykFUeFzarIlu2r3ELJnkyxfQNbeoKLhSH94U
>
> WGnE6jCT7yjVvpmzQV4n0DbKyFWn/wgEytE/lq28DpK8WmeCZodtOaQ2TU25HDK/egQMaw2c
> GiYmOatTUUGBcE736EPKcpXHxX7Cb7WlcEC0Ijingr50LHBM1spE+ZAvgynkNTUS7Dd8qYdE
> 6Zc1lBRvqTaK5OKiaVMNztydy9pqufk9lyQbDGsmNyFLgEgz2TDSxJkaTFQm8KlZLY2nlxQQ
> vx4QyY4DI6vmkeHHjCxP5/vUGFlFyq3t7j8qfBrDyg1mq/95cHLyLfTXSwVZE9ODXnP70Gsa
> mYLk4xmnp5FEO+3Kmdn+gzhUFLQA5bowGtXyyauKUNbiYftsy5VKsj4Sr1iGMJyxRiG1C00g
> k22RYtuVaMoTnkXZM6Nc2FZ8fMHtnxB8se7QOkgb4wgbugAwIBA6KBswSBsMOpCOW2cOM4FD
> YnUbyhrDFzo5gRJryTHFUGDYvEKJ0gooC+sg0ejhbcIrFvlp51m+BvvuvTqPVdjCj+goPhPz
> 6Ogv+7kgAhyKEW4Qr2QzYGD/Fy6fUPEXLGqD7d3ih0/JlbpMtT7fxgZV/FEnRdlMpLd68FTT
> 3dffkPjxPOgAlk/rY2KVM6tLyE0zk0SzuIN/ZAgaBoIBrwnnLpsoU7tFTIzVwSGUkv1+Jsds
> Rad56U'
> from squid (length: 1647).
> 2011/07/28 13:13:46| squid_kerb_auth: DEBUG: Decode
> 'YIIEzQYGKwYBBQUCoIIEwTCCBL2gJDAiBgkqhkiC9xIBAgIGCSqGSIb3EgECAgYKKwYBBAG
> CNwICCqKCBJMEggSPYIIEiwYJKoZIhvcSAQICAQBuggR6MIIEdqADAgEFoQMCAQ6iBwMFACA
> AAACjggOeYYIDmjCCA5agAwIBBaEWGxRTSVQyNy5CT1JERVJXQVJFLkNPTaItMCugAwIBAqE
> kMCIbBEhUVFAbGnNxdWlkLnNpdDI3LmJvcmRlcndhcmUuY29to4IDRjCCA0KgAwIBA6EDAgE
> EooIDNASCAzDb2BHDS95lmejMm5kGJNuwxcAV6OAOcH1hnOdb8sTR1nHSGGlvlbSKSg/G9l+
> akRgv9t9BNrsECoZYlZBsojRnFCVHSKjRCKYn+K3ExFIT8E5Szu+XuyIQvib9RMNPG5poBHC
> 4haBO9gxrkZ+yoPOhIP3lY4o9RltyumIAEPiO+36kqNSnTHu6ycuzImPA7+jlkU8VFyXHiwg
> rHNX7/1N5hpQWuIxl+UkvSJzZb/Tdoro4nM53id0ZrSdxs+Dn1WESc3EgZRwjItGNPHzPKeB
> 03v8IIFZkSCQSGp+GxUeOzxRpMzXN2r3T6PLFLlMHJQeJzFnCOnmJs4stiyW6rY7zF3L868O
> HYhcx9kUZQzUivnwI+lrfRYMlu87CbAnPZBbPc099b0Amp5gF2YlSOOpx2fLdIN2hs5GJCnz
> BK1Z7sGPiIIi2hWfbhAJMvAE8sLnahlD8ffraI3ZrxKfpVnNIxbJMvkq4pA8/Ka2w2DA1jeE
> cPkOg1oggA6+ygmvHZpQrU9twBTtjfHxi0050gdv/DbEbsHofFFDlLNCkQQYB50aDCOubu3N
> fqfNGre/EAJyrfmeRfjTNRtcOfauoUlZmVhqJXM0nkuvlDtvCXcUmjvcVwtG6CE13lqAsD08
> 1xJPaLnPAKmmqGVZUZNykFUeFzarIlu2r3ELJnkyxfQNbeoKLhSH94
>
> UWGnE6jCT7yjVvpmzQV4n0DbKyFWn/wgEytE/lq28DpK8WmeCZodtOaQ2TU25HDK/egQMaw2
> cGiYmOatTUUGBcE736EPKcpXHxX7Cb7WlcEC0Ijingr50LHBM1spE+ZAvgynkNTUS7Dd8qYd
> E6Zc1lBRvqTaK5OKiaVMNztydy9pqufk9lyQbDGsmNyFLgEgz2TDSxJkaTFQm8KlZLY2nlxQ
> Qvx4QyY4DI6vmkeHHjCxP5/vUGFlFyq3t7j8qfBrDyg1mq/95cHLyLfTXSwVZE9ODXnP70Gs
> amYLk4xmnp5FEO+3Kmdn+gzhUFLQA5bowGtXyyauKUNbiYftsy5VKsj4Sr1iGMJyxRiG1C00
> gk22RYtuVaMoTnkXZM6Nc2FZ8fMHtnxB8se7QOkgb4wgbugAwIBA6KBswSBsMOpCOW2cOM4F
> DYnUbyhrDFzo5gRJryTHFUGDYvEKJ0gooC+sg0ejhbcIrFvlp51m+BvvuvTqPVdjCj+goPhP
> z6Ogv+7kgAhyKEW4Qr2QzYGD/Fy6fUPEXLGqD7d3ih0/JlbpMtT7fxgZV/FEnRdlMpLd68FT
> T3dffkPjxPOgAlk/rY2KVM6tLyE0zk0SzuIN/ZAgaBoIBrwnnLpsoU7tFTIzVwSGUkv1+Jsd
> sRad56U'
> (decoded length: 1233).
> 2011/07/28 13:13:47| squid_kerb_auth: ERROR: gss_acquire_cred() failed:
> Unspecified GSS failure. Minor code may provide more information. Key
> table
> entry not found
> 2011/07/28 13:13:47| authenticateNegotiateHandleReply: Error validating
> user
> via Negotiate. Error returned 'BH gss_acquire_cred() failed: Unspecified
> GSS
> failure. Minor code may provide more information. Key table entry not
> found'
>
>
> Thanks
> Ming
>
> > -----Original Message-----
> > From: Ming Fu [mailto:Ming.Fu_at_watchguard.com]
> > Sent: Wednesday, July 27, 2011 4:21 PM
> > To: Markus Moeller; squid-users_at_squid-cache.org
> > Subject: RE: [squid-users] Re: squid 3.1.14 kerberos single sign on
> >
> > Hi Markus,
> >
> > From the windows domain controller:
> > =======================================================
> > Microsoft Windows [Version 6.0.6002]
> > Copyright (c) 2006 Microsoft Corporation. All rights reserved.
> >
> > C:\Users\Administrator>setspn -L squid
> > Registered ServicePrincipalNames for
> > CN=squid,CN=Users,DC=sit26,DC=borderware,DC
> > =com:
> > HTTP/squid.sit26.borderware.com
> >
> > C:\Users\Administrator>
> > =========================================================
> >
> > From the wireshark:
> > ==============================================================
> > The Kerberos response error is
> > Error code: KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN (7)
> > Realm: SIT26.BORDERWARE.COM
> > Server Name (Service and Instance): HTTP/squid.sit26.borderware.com
> > Name-type: service and instance (2)
> > Name: HTTP
> > Name: squid.sit26.borderware.com
> > ===============================================================
> >
> > I can attach the whole tcpdump if necessary.
> >
> > Regards,
> > Ming
> >
> >
> >
> > > -----Original Message-----
> > > From: Markus Moeller [mailto:huaraz_at_moeller.plus.com]
> > > Sent: Monday, July 25, 2011 4:27 PM
> > > To: squid-users_at_squid-cache.org
> > > Subject: [squid-users] Re: squid 3.1.14 kerberos single sign on
> > >
> > > This looks like the client does not get a Kerberos token, which can
> > have
> > > several reasons.
> > >
> > > 1) Is the proxy name used in the browser the fqdn used in the
> > > serviceprincipaname in AD e.g. HTTP/<fqdn> ?
> > > 2) Is the right encryption type used (Win7 / 2008 do not support
> DES
> > > out
> > > of the box)
> > >
> > > Can you capture with wireshark the communication between your Win7
> > > client
> > > and AD on port 88 ( Kerberos port ) and send me the capture file ?
> > >
> > > Regards
> > > Markus
> > >
> > >
> > > "Ming Fu" <Ming.Fu_at_watchguard.com> wrote in message
> > > news:09177155B3E82945AD8AF1F744B326458A7E1581_at_es05co...
> > > Hi,
> > >
> > > I am trying to setup squid 3.1.14 on linux with Kerberos SSO against
> > > windows
> > > 2008 server and win7 client.
> > > But both firefox 5.0.1 and IE 8 generate same log from squid.
> > >
> > > Is this a problem with squid or the browsers?
> > >
> > > ---- squid logs ----
> > > 2011/07/25 10:54:29| Accepting HTTP connections at [::]:3128, FD
> 31.
> > > 2011/07/25 10:54:29| HTCP Disabled.
> > > 2011/07/25 10:54:29| squid_kerb_auth: INFO: Starting version 1.0.5
> > > 2011/07/25 10:54:29| squid_kerb_auth: INFO: Starting version 1.0.5
> > > 2011/07/25 10:54:29| Loaded Icons.
> > > 2011/07/25 10:54:29| Ready to serve requests.
> > > 2011/07/25 10:55:40| squid_kerb_auth: DEBUG: Got 'YR
> > > TlRMTVNTUAABAAAAl4II4gAAAAAAAAAAAAAAAAAAAAAGAbAdAAAADw==' from squid
> > > (length: 59).
> > > 2011/07/25 10:55:40| squid_kerb_auth: DEBUG: Decode
> > > 'TlRMTVNTUAABAAAAl4II4gAAAAAAAAAAAAAAAAAAAAAGAbAdAAAADw==' (decoded
> > > length:
> > > 40).
> > > 2011/07/25 10:55:40| squid_kerb_auth: WARNING: received type 1 NTLM
> > > token
> > > 2011/07/25 10:55:40| authenticateNegotiateHandleReply: Error
> > validating
> > > user
> > > via Negotiate. Error returned 'BH received type 1 NTLM token'
> > >
> > >
> > > --- HTTP exchange Firefox to squid -----
> > > GET http://www.google.ca/ HTTP/1.1
> > > Host: www.google.ca
> > > User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:5.0.1) Gecko/20100101
> > > Firefox/5.0.1
> > > Accept:
> > text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
> > > Accept-Language: en-us,en;q=0.5
> > > Accept-Encoding: gzip, deflate
> > > Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
> > > Proxy-Connection: keep-alive
> > > Referer: http://www.google.ca/
> > > Cookie:
> > >
> >
> PREF=ID=c7a9ded9c38f7fe3:U=5104260d840ffece:FF=0:TM=1311350545:LM=131135
> > > 0546:S=CwtXJNRFT1U2j2O8;
> > >
> >
> NID=49=W5u6mljBsItvKL3sO3IeIPlhRWCzhZ29I_vbIPqWOlIGJkraxqtEfFdfCz2Hqs4HP
> > > rqf-O4eBSR6BUpyEfmw6CXbxQEnMDRnD8PRRVWLQbuJYgKsCwaUGJIf8sJWDGu7
> > >
> > > HTTP/1.0 407 Proxy Authentication Required
> > > Server: squid/3.1.14
> > > Mime-Version: 1.0
> > > Date: Mon, 25 Jul 2011 15:38:05 GMT
> > > Content-Type: text/html
> > > Content-Length: 3945
> > > X-Squid-Error: ERR_CACHE_ACCESS_DENIED 0
> > > Vary: Accept-Language
> > > Content-Language: en-us
> > > Proxy-Authenticate: Negotiate
> > > X-Cache: MISS from squid.sit26.borderware.com
> > > Via: 1.0 squid.sit26.borderware.com (squid/3.1.14)
> > > Connection: keep-alive
> > >
> > > GET http://www.google.ca/ HTTP/1.1
> > > Host: www.google.ca
> > > User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:5.0.1) Gecko/20100101
> > > Firefox/5.0.1
> > > Accept:
> > text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
> > > Accept-Language: en-us,en;q=0.5
> > > Accept-Encoding: gzip, deflate
> > > Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
> > > Proxy-Connection: keep-alive
> > > Referer: http://www.google.ca/
> > > Cookie:
> > >
> >
> PREF=ID=c7a9ded9c38f7fe3:U=5104260d840ffece:FF=0:TM=1311350545:LM=131135
> > > 0546:S=CwtXJNRFT1U2j2O8;
> > >
> >
> NID=49=W5u6mljBsItvKL3sO3IeIPlhRWCzhZ29I_vbIPqWOlIGJkraxqtEfFdfCz2Hqs4HP
> > > rqf-O4eBSR6BUpyEfmw6CXbxQEnMDRnD8PRRVWLQbuJYgKsCwaUGJIf8sJWDGu7
> > > Proxy-Authorization: Negotiate
> > > TlRMTVNTUAABAAAAl4II4gAAAAAAAAAAAAAAAAAAAAAGAbEdAAAADw==
> > >
> > >
> > > Regards,
> > > Ming
> > >
>
>
Received on Mon Aug 01 2011 - 17:55:12 MDT