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(PureBasic) 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.
IncludeFile "CkPublicKey.pb"
IncludeFile "CkScMinidriver.pb"
Procedure ChilkatExample()
; 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:
scmd.i = CkScMinidriver::ckCreate()
If scmd.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
; 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
readerName.s = "Alcor Micro USB Smart Card Reader 0"
success.i = CkScMinidriver::ckAcquireContext(scmd,readerName)
If success = 0
Debug CkScMinidriver::ckLastErrorText(scmd)
CkScMinidriver::ckDispose(scmd)
ProcedureReturn
EndIf
; If successful, the name of the currently inserted smart card is available:
Debug "Card name: " + CkScMinidriver::ckCardName(scmd)
; 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.
pubkey_sig.i = CkPublicKey::ckCreate()
If pubkey_sig.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
pubkey_kex.i = CkPublicKey::ckCreate()
If pubkey_kex.i = 0
Debug "Failed to create object."
ProcedureReturn
EndIf
success = CkScMinidriver::ckGetContainerKeys(scmd,7,pubkey_sig,pubkey_kex)
If success = 0
Debug CkScMinidriver::ckLastErrorText(scmd)
CkScMinidriver::ckDispose(scmd)
CkPublicKey::ckDispose(pubkey_sig)
CkPublicKey::ckDispose(pubkey_kex)
ProcedureReturn
EndIf
If CkPublicKey::ckEmpty(pubkey_sig) = 1
Debug "No signature key is present."
Else
Debug "Signature key:"
Debug CkPublicKey::ckGetPem(pubkey_sig,1)
EndIf
If CkPublicKey::ckEmpty(pubkey_kex) = 1
Debug "No Key Exchange key is present."
Else
Debug "Key Exchange key:"
Debug CkPublicKey::ckGetPem(pubkey_kex,1)
EndIf
CkScMinidriver::ckDeleteContext(scmd)
Debug "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-----
CkScMinidriver::ckDispose(scmd)
CkPublicKey::ckDispose(pubkey_sig)
CkPublicKey::ckDispose(pubkey_kex)
ProcedureReturn
EndProcedure
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