B4X

PKCS11 Find All Certificates on Smart Card or USB Token

See more PKCS11 Examples

Sample code showing how to examine all the certificates on a smart card or USB token.

Note: This example requires Chilkat v9.5.0.88 or later.

B4X

Dim success As Boolean = False

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

'  Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

Dim pkcs11 As ChilkatPkcs11
pkcs11.Initialize

'  Set your shared lib path -- either a full path to the DLL, .so, or .dylib,
'  or just the filename if the driver is in a location that can be automatically found. (Such as in C:\Windows\System32)
pkcs11.SharedLibPath = "aetpkss1.dll"

success = pkcs11.InitializeLibrary
If success = False Then
    Log(pkcs11.LastErrorText)
    Return
End If


'  Pass -1 for the slotID to open a session on the first non-empty slot.
Dim slotID As Int = -1

'  Open a session.
Dim readWrite As Boolean = True
success = pkcs11.OpenSession(slotID, readWrite)
If success = False Then
    Log(pkcs11.LastErrorText)
    Return
End If


'  Make it an authenticated session by calling Login.
'  
'  If we don't authenticate, then we won't be able to see the private keys, and thus
'  we won't know which certificates have an associated private key stored on the smart card.

'  The smart card PIN is passed to the Login method.
'  userType 1 indicates a "Normal User".
Dim userType As Int = 1
Dim pin As String = "0000"
success = pkcs11.Login(userType, pin)
If success = False Then
    Log(pkcs11.LastErrorText)
    success = pkcs11.CloseSession
    Return
End If


'  Call FindAllCerts to find all certificates on the smart card or USB token.
success = pkcs11.FindAllCerts
If success = False Then
    Log(pkcs11.LastErrorText)
    success = pkcs11.CloseSession
    Return
End If


'  The NumCerts property is set by FindAllCerts.
Dim numCerts As Int = pkcs11.NumCerts
Log("Number of certs: " & numCerts)

Dim privateKeyNote As String
Dim cert As ChilkatCert
cert.Initialize("cert")
Dim i As Int = 0
Do While i < numCerts
    pkcs11.GetCert(i, cert)
    privateKeyNote = ""
    If cert.HasPrivateKey = True Then
        privateKeyNote = "(has private key)"
    End If

    Log(i & ": " & privateKeyNote & " " & cert.SubjectDN)
    Log(i & ": issuer: " & cert.IssuerDN)
    Log("----")
    i = i + 1
Loop

'  Revert to an unauthenticated session by calling Logout.
success = pkcs11.Logout
If success = False Then
    Log(pkcs11.LastErrorText)
    success = pkcs11.CloseSession
    Return
End If


'  When finished, close the session.
'  It is important to close the session (memory leaks will occur if the session is not properly closed).
success = pkcs11.CloseSession
If success = False Then
    Log(pkcs11.LastErrorText)
    Return
End If


Log("Success.")