PowerBuilder

PKCS11 Find Certificate with Key Usage on Smart Card or USB Token

See more PKCS11 Examples

Demonstrates how to find and return the 1st certificate on a smart card or USB token with a desired intended key usage.

Note: This example requires Chilkat v9.5.0.91 or later.

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Pkcs11
integer li_SlotID
integer li_ReadWrite
integer li_UserType
string ls_Pin
oleobject loo_Cert

li_Success = 0

// 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.

loo_Pkcs11 = create oleobject
li_rc = loo_Pkcs11.ConnectToNewObject("Chilkat.Pkcs11")
if li_rc < 0 then
    destroy loo_Pkcs11
    MessageBox("Error","Connecting to COM object failed")
    return
end if

loo_Pkcs11.SharedLibPath = "aetpkss1.dll"

li_Success = loo_Pkcs11.Initialize()
if li_Success = 0 then
    Write-Debug loo_Pkcs11.LastErrorText
    destroy loo_Pkcs11
    return
end if

// Pass -1 for the slotID to open a session on the first non-empty slot.
li_SlotID = -1

// Open a session.
li_ReadWrite = 1
li_Success = loo_Pkcs11.OpenSession(li_SlotID,li_ReadWrite)
if li_Success = 0 then
    Write-Debug loo_Pkcs11.LastErrorText
    destroy loo_Pkcs11
    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".
li_UserType = 1
ls_Pin = "0000"
li_Success = loo_Pkcs11.Login(li_UserType,ls_Pin)
if li_Success = 0 then
    Write-Debug loo_Pkcs11.LastErrorText
    li_Success = loo_Pkcs11.CloseSession()
    destroy loo_Pkcs11
    return
end if

// --------------------------------------------------------------------------

loo_Cert = create oleobject
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")

// Find a certificate with an intended key usage.
// Possible key usages to find are:
// 
// DigitalSignature
// NonRepudiation
// KeyEncipherment
// DataEncipherment
// CertificateSigning
// CrlSigning
// 
// To find a cert having any one of several usages, pass a comma-separated list of usages:
li_Success = loo_Pkcs11.FindCert("keyUsage","NonRepudiation,DigitalSignature",loo_Cert)
if li_Success = 1 then
    Write-Debug "Cert with private key: " + loo_Cert.SubjectCN
else
    Write-Debug "No certificates having the intended key usage were found."
end if

// --------------------------------------------------------------------------

// Revert to an unauthenticated session by calling Logout.
li_Success = loo_Pkcs11.Logout()
if li_Success = 0 then
    Write-Debug loo_Pkcs11.LastErrorText
    li_Success = loo_Pkcs11.CloseSession()
    destroy loo_Pkcs11
    destroy loo_Cert
    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).
li_Success = loo_Pkcs11.CloseSession()
if li_Success = 0 then
    Write-Debug loo_Pkcs11.LastErrorText
    destroy loo_Pkcs11
    destroy loo_Cert
    return
end if

Write-Debug "Success."


destroy loo_Pkcs11
destroy loo_Cert