Lianja

(PKCS11) Use a Smart Card Certificate + Private Key for SSL/TLS Authentication

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Demonstrates how to use a certificate + private key located on a smart card for the TLS client certificate in an HTTPS request. Lianja

llSuccess = .F.

// 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.

loPkcs11 = createobject("CkPkcs11")

// 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)
loPkcs11.SharedLibPath = "C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.dll"

llSuccess = loPkcs11.Initialize()
if (llSuccess = .F.) then
    ? loPkcs11.LastErrorText
    release loPkcs11
    return
endif

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

// Open a session.
llReadWrite = .T.
llSuccess = loPkcs11.OpenSession(lnSlotID,llReadWrite)
if (llSuccess = .F.) then
    ? loPkcs11.LastErrorText
    release loPkcs11
    return
endif

// 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".
lnUserType = 1
lcPin = "0000"
llSuccess = loPkcs11.Login(lnUserType,lcPin)
if (llSuccess = .F.) then
    ? loPkcs11.LastErrorText
    llSuccess = loPkcs11.CloseSession()
    release loPkcs11
    return
endif

loCert = createobject("CkCert")

// Find a certificate by the Subject Common Name
llSuccess = loPkcs11.FindCert("subjectCN","BadSSL Client Certificate",loCert)
if (llSuccess = .T.) then
    ? "Found: " + loCert.SubjectCN
else
    ? "Not found: " + loCert.SubjectCN
    llSuccess = loPkcs11.CloseSession()
    release loPkcs11
    release loCert
    return
endif

? "Successfully loaded the cert object from the smart card / USB token."

// Note: When successful, the cert object is internally linked to the Pkcs11 object's authenticated session.
// The cert object can now be used to sign or do other cryptographic operations that occur on the smart card / USB token.

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

// Send an HTTPS request to https://client.badssl.com
// https://client.badssl.com (part of the badssl.com service) lets you test authentication using client SSL certificates. 
// The client certificate can be downloaded from https://badssl.com/download/.
// This server returns 200 OK if the correct client certificate is provided, and 400 Bad Request otherwise.

loHttp = createobject("CkHttp")

// Provide the client certificate (linked internally to our authenticated smartcard session)
llSuccess = loHttp.SetSslClientCert(loCert)
if (llSuccess = .F.) then
    ? loHttp.LastErrorText
    llSuccess = loPkcs11.CloseSession()
    release loPkcs11
    release loCert
    release loHttp
    return
endif

lcResponseBody = loHttp.QuickGetStr("https://client.badssl.com/")
if (loHttp.LastMethodSuccess = .F.) then
    ? loHttp.LastErrorText
    llSuccess = loPkcs11.CloseSession()
    release loPkcs11
    release loCert
    release loHttp
    return
endif

? "Response status code: " + str(loHttp.LastStatus)
? "Response body: "
? lcResponseBody

// ------------------------------------------------------------------------------------------------------------
// Revert to an unauthenticated session by calling Logout.
llSuccess = loPkcs11.Logout()
if (llSuccess = .F.) then
    ? loPkcs11.LastErrorText
    llSuccess = loPkcs11.CloseSession()
    release loPkcs11
    release loCert
    release loHttp
    return
endif

// When finished, close the session.
// It is important to close the session (memory leaks will occur if the session is not properly closed).
llSuccess = loPkcs11.CloseSession()
if (llSuccess = .F.) then
    ? loPkcs11.LastErrorText
    release loPkcs11
    release loCert
    release loHttp
    return
endif

? "Success."


release loPkcs11
release loCert
release loHttp