Everything lookslike it works, but PC is not authentified

Alexandros Gougousoudis gougousoudis at kh-berlin.de
Mon Sep 4 10:20:02 CEST 2006


Hi Alan,

>   It looks like it is doing machine authentication, in which case the

Correct.

> certs (both client and server) need the machine authentication OIDs,

I read that again and again, but I already have these OID in the certs. 
Here a dump of my server-cert:

Certificate:
     Data:
         Version: 3 (0x2)
         Serial Number: 40 (0x28)
         Signature Algorithm: sha1WithRSAEncryption
         Issuer: C=DE, ST=Berlin, L=Berlin, O=KHB HfM HfS, 
OU=ServiceCenter-IT, 
CN=ServiceCenter-IT_KHB_HfM_HfS/emailAddress=sc-it at kh-berlin.de
         Validity
             Not Before: Aug 10 09:33:43 2006 GMT
             Not After : Aug 10 09:33:43 2007 GMT
         Subject: C=DE, ST=Berlin, L=Berlin, O=KHB HfM HfS, 
OU=ServiceCenter-IT, 
CN=radius.verwaltung.kh-berlin.de/emailAddress=sc-it at kh-berlin.de
         Subject Public Key Info:
             Public Key Algorithm: rsaEncryption
             RSA Public Key: (4096 bit)
                 Modulus (4096 bit):
[...]
                 Exponent: 65537 (0x10001)
         X509v3 extensions:
             X509v3 Basic Constraints:
                 CA:FALSE
             Netscape Cert Type:
                 SSL Server
             Netscape Comment:
                 TinyCA Generated Certificate
             X509v3 Subject Key Identifier:
                 42:A9:4A:9F:04:88:71:B1:78:D4:1A:5D:00:A5:66:8E:78:C0:45:FF
             X509v3 Authority Key Identifier:
 
keyid:B9:39:B6:CE:8A:52:91:2E:AE:CE:16:24:18:B1:F4:D8:30:3D:04:2E
                 DirName:/C=DE/ST=Berlin/L=Berlin/O=KHB HfM 
HfS/OU=ServiceCenter-IT/CN=ServiceCenter-IT_KHB_HfM_HfS/emailAddress=sc-it at kh-berlin.de
                 serial:89:0D:6F:61:AC:0C:E0:05

             X509v3 Issuer Alternative Name:
                 email:sc-it at kh-berlin.de
             X509v3 Subject Alternative Name:
                 email:sc-it at kh-berlin.de

             X509v3 Extended Key Usage: critical
                 TLS Web Server Authentication
!!!!!!!!!!!!!!

     Signature Algorithm: sha1WithRSAEncryption
[...]

Isn't that exactly what it should like?

And here the client:
Certificate:
     Data:
         Version: 3 (0x2)
         Serial Number: 42 (0x2a)
         Signature Algorithm: sha1WithRSAEncryption
         Issuer: C=DE, ST=Berlin, L=Berlin, O=KHB HfM HfS, 
OU=ServiceCenter-IT, 
CN=ServiceCenter-IT_KHB_HfM_HfS/emailAddress=sc-it at kh-berlin.de
         Validity
             Not Before: Sep  1 11:18:32 2006 GMT
             Not After : Sep  1 11:18:32 2007 GMT
         Subject: C=DE, ST=Berlin, L=Berlin, O=KHB HfM HfS, 
OU=ServiceCenter-IT, CN=vinfo-t1/emailAddress=vinfo-t1-neuer at local
         Subject Public Key Info:
             Public Key Algorithm: rsaEncryption
             RSA Public Key: (4096 bit)
                 Modulus (4096 bit):
[...]
                 Exponent: 65537 (0x10001)
         X509v3 extensions:
             X509v3 Basic Constraints:
                 CA:FALSE
             Netscape Cert Type:
                 SSL Client, S/MIME, Object Signing
             Netscape Comment:
                 TinyCA Generated Certificate
             X509v3 Subject Key Identifier:
                 C0:72:0A:91:71:D9:E7:A9:73:CC:B4:B0:AD:17:B4:ED:61:AF:06:B9
             X509v3 Authority Key Identifier:
 
keyid:B9:39:B6:CE:8A:52:91:2E:AE:CE:16:24:18:B1:F4:D8:30:3D:04:2E
                 DirName:/C=DE/ST=Berlin/L=Berlin/O=KHB HfM 
HfS/OU=ServiceCenter-IT/CN=ServiceCenter-IT_KHB_HfM_HfS/emailAddress=sc-it at kh-berlin.de
                 serial:89:0D:6F:61:AC:0C:E0:05

             X509v3 Issuer Alternative Name:
                 email:sc-it at kh-berlin.de
             X509v3 Subject Alternative Name:
                 email:vinfo-t1-neuer at local
             X509v3 Key Usage: critical
                 Digital Signature, Key Encipherment

             X509v3 Extended Key Usage: critical
                 TLS Web Client Authentication
!!!!!!!!!

     Signature Algorithm: sha1WithRSAEncryption
[...]


What else could be a problem? How do you guys handle the 
"host/<netbiosname>" problem? Could that brake the cert?

TIA
  Alex


-- 
ServiceCenter IT - Alexandros Gougousoudis (Leiter)

Gemeinsame Einrichtung der Kunsthochschule Berlin-Weissensee, Hochschule 
für Musik "Hanns Eisler" und der Hochschule für Schauspielkunst "Ernst 
Busch".

Tel.: 030 / 477 05 - 444 * Fax.: 030 / 477 05 - 445





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