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Visual Basic 6.0 Examples

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(Visual Basic 6.0) ScMinidriver - Get Public Keys from Smart Card Key Container

See more ScMinidriver Examples

Demonstrates how to query a key container on a smart card (or USB token) to get the public part of the private keys that are present. A key container can hold two separate private keys -- one in the "signature" position, and the other in the "key exchange" position.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

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

' Chilkat recommends the following free tool for interactively examining the contents of your smart card
' through the ScMinidriver interface:  MGTEK Tool for Minidriver enabled Smart Cards

' Let's first look at our smart card..
' Here's the view of our Gemalto (Thales) IDPrime MD T=0 smart card in the MGTEK tool:



Dim scmd As New ChilkatScMinidriver

' First we need to acquire a context to the smart card in the reader where it is inserted.
' Reader names (smart card readers or USB tokens) can be discovered
' via List Readers or Find Smart Cards
Dim readerName As String
readerName = "Alcor Micro USB Smart Card Reader 0"
Dim success As Long
success = scmd.AcquireContext(readerName)
If (success = 0) Then
    Debug.Print scmd.LastErrorText
    Exit Sub
End If

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

' We likely shouldn't need to authenticate with the smart card (use a PIN) to simply get a public key,
' so we can skip the PIN authenticatin step..

' Let's get the key(s) present in Container #7.
' In our case (shown in the image above), there is a private key in the "key exchange" position, but no key in the "signature" position.
Dim pubkey_sig As New PublicKey
Dim pubkey_kex As New PublicKey

success = scmd.GetContainerKeys(7,pubkey_sig,pubkey_kex)
If (success = 0) Then
    Debug.Print scmd.LastErrorText
    Exit Sub
End If

If (pubkey_sig.Empty = 1) Then
    Debug.Print "No signature key is present."
Else
    Debug.Print "Signature key:"
    Debug.Print pubkey_sig.GetPem(1)
End If

If (pubkey_kex.Empty = 1) Then
    Debug.Print "No Key Exchange key is present."
Else
    Debug.Print "Key Exchange key:"
    Debug.Print pubkey_kex.GetPem(1)
End If

success = scmd.DeleteContext()

Debug.Print "Success."

' Here's the output of the above sample code:

' Card name: IDPrime MD T=0
' No signature key is present.
' Key Exchange key:
' -----BEGIN RSA PUBLIC KEY-----
' MIIBCgKCAQEAsXeRhM55P13FbpNcXAMR3olbw2Wa6keZIHu5YTZYUBTlYWId+pNi
' wUz3zFIEo+0IfYR0H27ybIycQO+1IIzJofUFNMAL3tZps2OKPlsjuCPls6kXpXhv
' /gvhux8LrCtp4PcKWqJ6QVOZKChc7WAx40qFWzHi57ueqRTv3x0kESqGg/VjsqyT
' Evb55psJO2RsfhLT7+YVh3hImRM3RDaJdkTkPuOxeFyT6N7VXD09329sLuS3QkUb
' E9zEKDnz9X3d8dEQdJhSI9ba5fxl8R7fu8pB67ElfzFml96X1jLFtzy1pzOT5Fc4
' ROcaqlYckVzdBq9sxezm6MYmDBjNAcibRwIDAQAB
' -----END RSA PUBLIC KEY-----

 

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