B4X

PKCS11 Login / Logout

See more PKCS11 Examples

Sample code showing how to login and logout of a PKCS11 session. A session becomes authenticated when Login is called, and returns to the unauthenticated state when Logout is called. A smart card's PIN is passed to the Login method.

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

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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.
'  The smart card PIN is passed to the Login method.
'  The user type can be one of three choices:
'  0 - Security Officer
'  1 - Normal User
'  2 - Context Specific.
'  You'll likely always login as the 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


'  Do what is needed with the authenticated session...
'  ...
'  ...

'  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("PKCS11 Login and Logout successfully demonstrated.")