(Visual Basic 6.0) Find a Certificate by it's SHA-1 Thumbprint

Finds a certificate by it's SHA-1 hex thumbprint. Parts of this example are specific to Windows because it searches the Windows Current User certificate store.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim certStore As New ChilkatCertStore

Dim thumbprint As String
thumbprint = "12c1dd8015f3f03f7b1fa619dc24e2493ca8b4b2"

' This part of the example is specific to Windows because it is opening the Windows Current-User certificate store.
Dim bReadOnly As Long
bReadOnly = 1
Dim success As Long
success = certStore.OpenCurrentUserStore(bReadOnly)
If (success <> 1) Then
    Debug.Print certStore.LastErrorText
    Exit Sub
End If

' Find the certificate with the desired thumbprint
Dim cert As ChilkatCert
Set cert = certStore.FindCertBySha1Thumbprint(thumbprint)
If (certStore.LastMethodSuccess <> 1) Then
    Debug.Print "Failed to find the certificate."
    Exit Sub
End If

Debug.Print "Found: " & cert.SubjectCN

' -------------------------------------------------------------------------------------
' Alternatively, one could load a certificate store object with certs from a PEM file,
' and do the same thing..
Dim certStorePem As New ChilkatCertStore

success = certStorePem.LoadPemFile("pemFiles/certificates.pem")
If (success <> 1) Then
    Debug.Print certStorePem.LastErrorText
    Exit Sub
End If

Set cert = certStorePem.FindCertBySha1Thumbprint(thumbprint)
If (certStorePem.LastMethodSuccess <> 1) Then
    Debug.Print "Failed to find the certificate."
    Exit Sub
End If

Debug.Print "Found: " & cert.SubjectCN