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QUERYCLIENTCERT() Does Not Make a Callback on Windows 2000 Wldap32.dll

Article ID: 811288 - View products that this article applies to.

SYMPTOMS

You cannot implement Lightweight Directory Access Protocol (LDAP) Secure Sockets Layer (SSL) client-side authentication on Windows 2000 because the callback that is defined in LDAP_OPT_CLIENT_CERTIFICATE is never called by the Windows 2000 version of Wldap32.dll.

The QUERYCLIENTCERT function is a client-side function that permits the server to request a certificate from the client when it is establishing an SSL connection.

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CAUSE

The QUERYCLIENTCERT function does not make callbacks in the Windows 2000 version of Wldap32.dll.

The Microsoft Windows XP version of Wldap32.dll works correctly with QUERYCLIENTCERT calls.

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RESOLUTION

Service Pack Information

To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910

(http://support.microsoft.com/kb/260910/EN-US/ )

How to Obtain the Latest Windows 2000 Service Pack

Hotfix Information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

(http://support.microsoft.com/contactus/?ws=support)

Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. The English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

   Date         Time   Version        Size     File name
   --------------------------------------------------------
   08-Jan-2003  11:06  5.0.2195.6109  124,688  Adsldp.dll
   08-Jan-2003  11:06  5.0.2195.5781  131,344  Adsldpc.dll
   08-Jan-2003  11:06  5.0.2195.6109   62,736  Adsmsext.dll
   08-Jan-2003  11:06  5.0.2195.6143  358,672  Advapi32.dll
   08-Jan-2003  11:06  5.0.2195.6094   49,936  Browser.dll
   08-Jan-2003  11:06  5.0.2195.6143  135,952  Dnsapi.dll
   08-Jan-2003  11:06  5.0.2195.6134   96,016  Dnsrslvr.dll
   08-Jan-2003  11:06  5.0.2195.6125   45,328  Eventlog.dll
   08-Jan-2003  11:06  5.0.2195.6161  147,216  Kdcsvc.dll
   22-Nov-2002  10:45  5.0.2195.6137  203,536  Kerberos.dll
   21-Aug-2002  08:27  5.0.2195.6023   71,248  Ksecdd.sys
   09-Dec-2002  14:04  5.0.2195.6155  507,664  Lsasrv.dll
   09-Dec-2002  14:04  5.0.2195.6155   33,552  Lsass.exe
   22-Nov-2002  10:20  5.0.2195.6137  109,328  Msv1_0.dll
   08-Jan-2003  11:06  5.0.2195.5979  307,472  Netapi32.dll
   08-Jan-2003  11:06  5.0.2195.6161  360,720  Netlogon.dll
   08-Jan-2003  11:06  5.0.2195.6161  923,408  Ntdsa.dll
   08-Jan-2003  11:06  5.0.2195.6161  391,440  Samsrv.dll
   08-Jan-2003  11:06  5.0.2195.6120  130,320  Scecli.dll
   08-Jan-2003  11:06  5.0.2195.6160  303,888  Scesrv.dll
   08-Jan-2003  11:06  5.0.2195.5859   48,912  W32time.dll
   04-Jun-2002  13:32  5.0.2195.5859   57,104  W32tm.exe
   08-Jan-2003  11:06  5.0.2195.6163  123,664  Wldap32.dll

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Windows 2000 Service Pack 4.

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MORE INFORMATION

For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:

265173

(http://support.microsoft.com/kb/265173/EN-US/ )

The Datacenter Program and Windows 2000 Datacenter Server Product

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