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(VB.NET UWP/WinRT) ScMinidriver - Find and Load Certificate from Smart Card or USB Token

See more ScMinidriver Examples

Demonstrates how to find and load a specific certificate located on a smart card or USB token.

Note: This functionality was introduced in Chilkat v9.5.0.87.

Note: The ScMinidriver functionality is for Windows-only because ScMinidriver DLLs only exist on Windows. In the next version, Chilkat will be releasing a Pkcs11 class to support Linux, MacOSX, and possibly other operating systems.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim scmd As New Chilkat.ScMinidriver

' Reader names (smart card readers or USB tokens) can be discovered
' via List Readers or Find Smart Cards
Dim readerName As String = "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0"
Dim success As Boolean = scmd.AcquireContext(readerName)
If (success = False) Then
    Debug.WriteLine(scmd.LastErrorText)
    Exit Sub
End If


' If successful, the name of the currently inserted smart card is available:
Debug.WriteLine("Card name: " & scmd.CardName)

' If desired, perform regular PIN authentication with the smartcard.
' For more details about smart card PIN authentication, see the Smart Card PIN Authentication Example
Dim retval As Integer = scmd.PinAuthenticate("user","000000")
If (retval <> 0) Then
    Debug.WriteLine("PIN Authentication failed.")
End If


' You can find a cerficate using any of the following certificate parts:
' "subjectDN" -- The full distinguished name of the cert.
' "subjectDN_withTags" -- Same as above, but in a format that includes the subject part tags, such as the "CN=" in "CN=something"
' "subjectCN" -- The common name part (CN) of the certificate's subject.
' "serial" -- The certificate serial number.
' "serial:issuerCN" -- The certificate serial number + the issuer's common name, delimited with a colon char.
' These are the same certificate parts that can be retrieved by listing certificates on the smart card (or USB token).
' See List Certificates on Smart Card Example
Dim certPart As String = "subjectCN"
Dim partValue As String = "PIVKey E42D60A759D39147A26E0AF2FB1183C5"

' If the certificate is found, it is loaded into the cert object.
Dim cert As New Chilkat.Cert
success = scmd.FindCert(certPart,partValue,cert)
If (success = False) Then
    Debug.WriteLine("Failed to find the certificate.")
Else
    Debug.WriteLine("Successfully loaded the cert object from the smart card / USB token.")

    ' Note: When successful, the cert object is internally linked to the ScMinidriver object's authenticated session.
    ' The cert object can now be used to sign or do other cryptographic operations that occur on the smart card / USB token.
    ' If your application calls PinDeauthenticate or DeleteContext, the cert will no longer be able to sign on the smart card
    ' because the smart card ScMinidriver session will no longer be authenticated or deleted.
End If



' ...
' ...
' ...


' When finished with operations that required authentication, you may if you wish, deauthenticate the session.
success = scmd.PinDeauthenticate("user")
If (success = False) Then
    Debug.WriteLine(scmd.LastErrorText)
End If


' Delete the context when finished with the card.
success = scmd.DeleteContext()
If (success = False) Then
    Debug.WriteLine(scmd.LastErrorText)
End If


 

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