VB.NET

PKCS11 Import an Existing AES Key onto the HSM

See more PKCS11 Examples

Demonstrates how to import an existing AES symmetric encrytion key onto the smartcard/token. The imported AES key is a session object, and only exists for the duration of the PKCS11 session. (AES keys are typically used for wrapping/unwrapping RSA and EC keys.)

Note: This example requires Chilkat v9.5.0.96 or later.

VB.NET

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 New Chilkat.Pkcs11

' Use the PKCS11 driver (.dll, .so, .dylib) for your particular HSM.
' (The format of the path will change with the operating system.  Obviously, "C:/" is not used on non-Windows systems.
pkcs11.SharedLibPath = "C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.dll"

' Establish a logged-on session.
Dim pin As String = "0000"
Dim userType As Integer = 1
success = pkcs11.QuickSession(userType,pin)
If (success = False) Then
    Debug.WriteLine(pkcs11.LastErrorText)
    Exit Sub
End If


' Generate a 256-bit AES key.
' (32 bytes is 256 bits)
' Append 32 bytes of random data in the base64 encoding.
Dim sbAesKey As New Chilkat.StringBuilder
sbAesKey.AppendRandom(32,"base64")

Dim attrs As New Chilkat.JsonObject
' Specify the type of object, and the type of key.
attrs.UpdateString("class","CKO_SECRET_KEY")
attrs.UpdateString("key_type","CKK_AES")
' Add an optional label if desired.
attrs.UpdateString("label","My AES wrapping/unwrapping key")
' Allow the key to be use for wrapping and unwrapping operations.
attrs.UpdateBool("wrap",True)
attrs.UpdateBool("unwrap",True)

' Provide the AES key material.
attrs.UpdateString("value",sbAesKey.GetAsString())

' Create the object (i.e. create the AES key with the given key material.)
' Returns the PKCS11 object handle of the created AES session key.
Dim objHandle As UInt32 = pkcs11.CreatePkcs11Object(attrs)
If (objHandle = 0) Then
    Debug.WriteLine(pkcs11.LastErrorText)
    Debug.WriteLine("Failed.")
Else
    Debug.WriteLine("PKCS11 object handle = " & objHandle)
    Debug.WriteLine("Successfully created a 256-bit AES session key.")
End If


' Typically, you would do other things in the PKCS11 session that use the handle of AES key we just created.
' ...
' ...

pkcs11.Logout()
pkcs11.CloseSession()