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Visual Basic 6.0 Examples

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(Visual Basic 6.0) Backup Windows Current User / Personal Certificates to a .zip

Demonstrates how to backup the certificates in the Windows registry-based Current User certificate store (in the "Personal" Logical Store as seen in certmgr.msc), to a zip archive. Certificates having an exportable private key are exported to .pfx files. Certificates with no private key, or with a non-exportable private key, are exported to .cer files.

Obviously, this example only runs on Windows computers.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Dim certStore As New ChilkatCertStore

Dim readOnly As Long
readOnly = 1
Dim success As Long
success = certStore.OpenCurrentUserStore(readOnly)
If (Not success) Then
    Debug.Print certStore.LastErrorText
    Exit Sub
End If

Dim pfxPassword As String
pfxPassword = "secret"

Dim allSuccess As Long
allSuccess = 1
Dim numSuccess As Long
numSuccess = 0

Dim entry As ChilkatZipEntry
Dim zip As New ChilkatZip
success = zip.NewZip("qa_output/personalCerts.zip")

Dim certData As New ChilkatBinData
Dim sbFilename As New ChilkatStringBuilder

'  Iterate over the certificates in the Current User store.
Dim numCerts As Long
numCerts = certStore.NumCertificates
Dim i As Long
i = 0
Do While i < numCerts
    Dim cert As ChilkatCert
    Set cert = certStore.GetCertificate(i)
    Debug.Print "DN = " & cert.SubjectDN

    success = sbFilename.SetString("cert")
    success = sbFilename.AppendInt(i + 1)

    Dim bHasPrivateKey As Long
    bHasPrivateKey = cert.HasPrivateKey()
    If ((bHasPrivateKey = 1) And (cert.PrivateKeyExportable = 1)) Then
        '  Export to a .pfx
        success = cert.ExportToPfxBd(pfxPassword,1,certData)
        If (success = 1) Then
            success = sbFilename.Append(".pfx")
            Set entry = zip.AppendBd(sbFilename.GetAsString(),certData)

        End If

    Else
        '  Export to a .cer
        success = cert.ExportCertDerBd(certData)
        If (success = 1) Then
            success = sbFilename.Append(".cer")
            Set entry = zip.AppendBd(sbFilename.GetAsString(),certData)

        End If

    End If

    If (success <> 1) Then
        allSuccess = 0
    Else
        numSuccess = numSuccess + 1
    End If

    i = i + 1
Loop

If (numSuccess > 0) Then
    success = zip.WriteZipAndClose()
    If (success <> 1) Then
        Debug.Print zip.LastErrorText
        allSuccess = 0
    End If

End If

Debug.Print "All success = " & allSuccess

 

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