SYMPTOMS
If you use Microsoft Collaboration Data Objects (CDO) and the COM version of the Cryptography API (CAPICOM) to validate Secure/Multipurpose Internet Mail Extensions
(S/MIME) signatures, the validation does not succeed.
The following sample code demonstrates how this validation typically occurs.
Sub Command1_Click (ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles Command1.Click
Dim oCDO As New CDO.Message
Dim oST As ADODB.Stream
Dim sContent, sSignature As String
oST = oCDO.GetStream
oST.Type = ADODB.StreamTypeEnum.adTypeText
oST.LoadFromFile("Test.eml")
oST.Flush()
sContent =oCDO.BodyPart.BodyParts(1).GetStream.ReadText
sSignature = oCDO.BodyPart.BodyParts(2).GetEncodedContentStream.ReadText
Dim oC As New CAPICOM.SignedData oC.Content = sContent
oC.Verify(sSignature, True,CAPICOM.CAPICOM_SIGNED_DATA_VERIFY_FLAG.CAPICOM_VERIFY_SIGNATURE_ONLY)
MsgBox("done")
End Sub
The steps that occur in the sample code are as follows:
- The caller requests the message content that is stored in the first body part of the message.
- The caller requests the S/MIME signature that is stored in the second body part of the message.
- The caller sends each body part to CAPICOM for signature validation.
RESOLUTION
Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows XP service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
File information
The English version of this hotfix has the file attributes (or later file attributes) 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.Microsoft Windows XP, 32-bit editions
Date Time Version Size File name
--------------------------------------------------------------
18-Mar-2005 17:14 6.1.1000.0 2,025,472 Cdosys.dll
25-Feb-2005 03:53 6.1.22.4 371,936 Updspapi.dll
Microsoft Windows XP, 64-bit editions for Itanium-based computers
Date Time Version Size File name Platform
---------------------------------------------------------------------
18-Mar-2005 17:11 6.1.1000.0 3,646,976 Cdosys.dll IA-64
18-Mar-2005 17:14 6.1.1000.0 2,025,472 Wcdosys.dll x86
25-Feb-2005 03:50 6.1.22.4 639,712 Updspapi.dll IA-64