(Visual FoxPro) ScMinidriver - Get Public Keys from Smart Card Key Container
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.
LOCAL loScmd
LOCAL lcReaderName
LOCAL lnSuccess
LOCAL loPubkey_sig
LOCAL loPubkey_kex
* 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:
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.ScMinidriver')
loScmd = CreateObject('Chilkat.ScMinidriver')
* 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
lcReaderName = "Alcor Micro USB Smart Card Reader 0"
lnSuccess = loScmd.AcquireContext(lcReaderName)
IF (lnSuccess = 0) THEN
? loScmd.LastErrorText
RELEASE loScmd
CANCEL
ENDIF
* If successful, the name of the currently inserted smart card is available:
? "Card name: " + loScmd.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.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.PublicKey')
loPubkey_sig = CreateObject('Chilkat.PublicKey')
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.PublicKey')
loPubkey_kex = CreateObject('Chilkat.PublicKey')
lnSuccess = loScmd.GetContainerKeys(7,loPubkey_sig,loPubkey_kex)
IF (lnSuccess = 0) THEN
? loScmd.LastErrorText
RELEASE loScmd
RELEASE loPubkey_sig
RELEASE loPubkey_kex
CANCEL
ENDIF
IF (loPubkey_sig.Empty = 1) THEN
? "No signature key is present."
ELSE
? "Signature key:"
? loPubkey_sig.GetPem(1)
ENDIF
IF (loPubkey_kex.Empty = 1) THEN
? "No Key Exchange key is present."
ELSE
? "Key Exchange key:"
? loPubkey_kex.GetPem(1)
ENDIF
loScmd.DeleteContext()
? "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-----
RELEASE loScmd
RELEASE loPubkey_sig
RELEASE loPubkey_kex
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