VB.NET

Find a PFX Certificate by localKeyId

Demonstrates Pfx.CertByLocalKeyId, which searches for a certificate whose certificate-bag localKeyId attribute matches a given value and copies it into a Cert object.

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

Background. The encoding argument names the binary representation of the id, such as decimal, base64, or hex. The localKeyId links a certificate to its corresponding private key within the container.

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Dim success As Boolean = False

Dim pfx As New Chilkat.Pfx

'  The file path is relative to the application's current working directory.  An absolute path
'  may also be used.  Supply the path appropriate to your own environment.
'  The PFX password should come from a secure source rather than being hard-coded.
Dim password As String = "myPfxPassword"
success = pfx.LoadPfxFile("qa_data/identity.pfx",password)
If (success = False) Then
    Debug.WriteLine(pfx.LastErrorText)
    Exit Sub
End If


'  Find a certificate whose certificate-bag localKeyId attribute matches the given value.  The 2nd
'  argument names the binary representation of the id, such as decimal, base64, or hex.
Dim cert As New Chilkat.Cert
success = pfx.CertByLocalKeyId("01","hex",cert)
If (success = False) Then
    Debug.WriteLine(pfx.LastErrorText)
    Exit Sub
End If

Debug.WriteLine("Found certificate: " & cert.SubjectCN)