see sharp RSS 2.0
# Monday, 03 May 2010

Registry files can be fun, and everyone knows how to add things to the registry via reg files.

But you can also remove entries;

Prefix the key with '-' to remove it, set the value to '-' to remove it.


[-HKEY_LOCAL_MACHINE\Software\Foo] will remove the complete key 'Foo'.




will leave the key 'Foo' and remove the value 'Bar'

Keep in mind:

The registry is a central element in windows. Messing around with it may cause unpredictabele results and the whole system may fail.

So pleas double check what you are doing to the registry!!!


Monday, 03 May 2010 14:20:49 (Mitteleuropäische Sommerzeit, UTC+02:00)  #    -
# Thursday, 22 April 2010

Troubleshooting a custom MA for FIM2010 starts usually with looking into the eventlog :-)

So in this case there was not much to see, so I added my .NET Trace statments to the code. Easy, but where to configure the switches? 

Finally i found that the MA is loaded by the FIM server itself so theres the config file too.

The server is still called MIISSERVER.EXE and located in

C:\Program Files\Microsoft Forefront Identity Manager\2010\Synchronization Service\Bin

So just edit C:\Program Files\Microsoft Forefront Identity Manager\2010\Synchronization Service\Bin\miiserver.exe.config and add you listener and switches:

    <trace autoflush="true" indentsize="4">
        <add name="mylog"
             initializeData="c:\logs\mylog.log" />
      <add name="MySwitch" value="4"/>
Thursday, 22 April 2010 15:05:00 (Mitteleuropäische Sommerzeit, UTC+02:00)  #    -
FIM | Tracing
# Saturday, 20 March 2010

MAC Addresses are unique to the networkcard and can be used to identify your PC.

You can view your MAC addresses by typing ipconfig /all

Ethernet adapter Loopback:
  Connection-specific DNS Suffix  . :
  Description . . . . . . . . . . . : Microsoft Loopback Adapter
  Physical Address. . . . . . . . . : 02-00-4C-4F-4F-50
  DHCP Enabled. . . . . . . . . . . : No
  Autoconfiguration Enabled . . . . : Yes
  IPv4 Address. . . . . . . . . . . :
  Subnet Mask . . . . . . . . . . . :
  Default Gateway . . . . . . . . . :
  DNS Servers . . . . . . . . . . . :
  NetBIOS over Tcpip. . . . . . . . : Enabled

to view other machines MAC addresses you can ping them and then type arp -a which wil result in a list similar to this:

Interface: --- 0xb
  Internet Address      Physical Address      Type           00-04-0e-f6-17-55     dynamic           00-04-0e-aa-88-ab     dynamic           00-01-db-09-55-42     dynamic

The first three bytes identify the manufacturer of the card, the remainder identifies the card itself. 

you can look those up here:

 I wrote a small tool that parses a file and returns the manufactuer (632.92 KB)
Saturday, 20 March 2010 12:15:35 (Mitteleuropäische Zeit, UTC+01:00)  #    -
anything else
# Friday, 19 March 2010
Friday, 19 March 2010 19:08:58 (Mitteleuropäische Zeit, UTC+01:00)  #    -

# Thursday, 11 March 2010

To enable foreign key import on a MS CA you need to set the registry accordingly:

certutil –setreg ca\KRAFlags +KRAF_ENABLEFOREIGN

then, after a restart of the CA service, you can start importing:

certutil -f -importKMS /?
  CertUtil [Options] -ImportKMS UserKeyAndCertFile [CertId]
  Import user keys and certificates into server database for key archival
    UserKeyAndCertFile -- Data file containing user private keys and certificates to be archived.  This can be any of the following:
            Exchange Key Management Server (KMS) export file
            PFX file
            Outlook key export (EPF) file
    CertId -- KMS export file decryption certificate match token.  See -store.
    Use -f to import certificates not issued by the CA.
  -f                -- Force overwrite
  -gmt              -- Display times as GMT
  -seconds          -- Display times with seconds and milliseconds
  -silent           -- Use silent flag to acquire crypt context
  -split            -- Split embedded ASN.1 elements, and save to files
  -v                -- Verbose operation
  -privatekey       -- Display password and private key data
  -config Machine\CAName    -- CA and Machine name string
  -p Password               -- Password
  -symkeyalg SymmetricKeyAlgorithm[,KeyLength] -- Name of Symmetric Key Algorithm with optional key length, example: AES,128 or 3DES
CertUtil -?              -- Display a verb list (command list)
CertUtil -ImportKMS -?   -- Display help text for the "ImportKMS" verb
CertUtil -v -?           -- Display all help text for all verbs


Thursday, 11 March 2010 08:51:53 (Mitteleuropäische Zeit, UTC+01:00)  #    -
# Thursday, 22 October 2009 has great posts about programming.

amongst them a nice explanation of the AES encryption

Check it out...

Thursday, 22 October 2009 17:09:31 (Mitteleuropäische Sommerzeit, UTC+02:00)  #    -
# Wednesday, 02 September 2009

I often have to diagnose CA 'misbehaviours' and its even more often when I have to lookup where the hell the logfiles are and hor to enable the logging. So a bit of googelingbinging and found this

Certification Authority Settings

  • Enable Certificate Services Debug Logging by running the following commands on the CA:
    certutil.exe -f -setreg ca\debug 0xffffffff
    Net Stop Certsvc && Net Start Certsvc
  • The following log files will be created:
    %SystemRoot%\certsrv.log (Certsrv.exe) Certificate Services
    %SystemRoot%\certutil.log (Certutil.exe)
    %SystemRoot%\certreq.log (Certreq.exe)
    %SystemRoot%\certmmc.log (Certmmc.dll) Certificate Services MMC snap-in
    %SystemRoot%\certocm.log (Certocm.dll) Certificate Services Setup

take a look, there are is more useful information there...


Ah, and if you use CLM/FIM this might be of interest as well:

Wednesday, 02 September 2009 20:49:27 (Mitteleuropäische Sommerzeit, UTC+02:00)  #    -
CLM | Tracing | CA
# Sunday, 19 July 2009

Matt Atkers has a nice Post on how to reboot your Zune:

It has worked on my first Zune, but for my 80G device I'm still trying to figure out to get rid of the Screens 5 and 3.
Sunday, 19 July 2009 20:10:04 (Mitteleuropäische Sommerzeit, UTC+02:00)  #    -
# Wednesday, 24 June 2009

Sometime you need to get the integer value (or combination of values) for the Key Usage (i.e. for use in CertReq.EXE's INF files)

This is X509 Certificate Key Usage as defined in .NET:

Key Usage Description
0x0000 None
0x0001 EncipherOnly
0x0002 CrlSign
0x0004 KeyCertSign
0x0008 KeyAgreement
0x0010 DataEncipherment
0x0020 KeyEncipherment
0x0040 NonRepudiation
0x0080 DigitalSignature
0x8000 DecipherOnly

Of course it can be a combination of values :-)

To get it out of a certificate use this snippet (certificate is a valid X509Certificate2 object):

// either "Key Usage" or the OID "" can be used here
string keyUsageOID = "";

X509KeyUsageExtension keyUsageExtension = certificate.Extensions[keyUsageOID] as X509KeyUsageExtension;

if (keyUsageExtension != null)
   Console.WriteLine("Key Usage is 0x{0:x4}, {1}",

      // test for signature 
      bool hasSignatureKeyUsage = (keyUsageExtension.KeyUsages & X509KeyUsageFlags.DigitalSignature) == X509KeyUsageFlags.DigitalSignature;
      // just for fun: test for CRL signing too
      bool hasCrlSignKeyUsage = (keyUsageExtension.KeyUsages & X509KeyUsageFlags.CrlSign) == X509KeyUsageFlags.CrlSign;
// either Enhanced Key Usage or the OID
string enhancedKeyUsageOID = "";

X509EnhancedKeyUsageExtension enhancedkeyUsageExtension = certificate.Extensions[enhancedKeyUsageOID] as X509EnhancedKeyUsageExtension;

if (enhancedkeyUsageExtension != null)
   foreach (Oid oid in enhancedkeyUsageExtension.EnhancedKeyUsages)
      Console.WriteLine("Enhanced Key Usage is {0} ({1})",
Wednesday, 24 June 2009 09:51:50 (Mitteleuropäische Sommerzeit, UTC+02:00)  #    -
C# | Certificates
# Tuesday, 26 May 2009

Alejandro Campos Magencio has written a nice post on how to import a certificate without user interaction:

It is built around CryptUIWizImport which is described here:

Be sure to check all flags available:


Value Meaning

This function will perform the import based on the information in the CRYPTUI_WIZ_IMPORT_SRC_INFO structure pointed to by pImportSrc into the store specified by hDestCertStore without displaying any user interface. If this flag is not specified, this function will display a wizard to guide the user through the import process.


Suppress all user interfaces generated by cryptographic service providers (CSPs). This option can be overridden by the CRYPTUI_WIZ_NO_UI_EXCEPT_CSP option.


Suppress all user interfaces except those generated by CSPs. This option overrides the CRYPTUI_WIZ_IGNORE_NO_UI_FLAG_FOR_CSPS option.


Allow certificates to be imported.


Allow CRLs to be imported.


Allow CTLs to be imported.


Do not allow the user to change the destination certificate store represented by the hDestCertStore parameter.


Import the object to the certificate store for the local computer. This applies only to Personal Information Exchange (PFX) imports.


Import the object to the certificate store for the current user. This applies only to PFX imports.


Import the object to a remote certificate store. Set this flag if the hDestCertStore parameter represents a remote certificate store.

Tuesday, 26 May 2009 20:04:39 (Mitteleuropäische Sommerzeit, UTC+02:00)  #    -
C# | CAPI | Certificates
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