(Lianja) 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.

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// 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")

loPkcs11.SharedLibPath = "aetpkss1.dll"

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

// We need to call Discover to get the slot ID.
// (A slot is a smart card reader or USB token.)
llOnlyTokensPresent = .T.
loJson = createobject("CkJsonObject")
llSuccess = loPkcs11.Discover(llOnlyTokensPresent,loJson)
if (llSuccess = .F.) then
    ? loPkcs11.LastErrorText
    release loPkcs11
    release loJson
    return
endif

// Make sure we have at least one slot.
if (loJson.SizeOfArray("slot") <= 0) then
    ? "No occuplied slots."
    release loPkcs11
    release loJson
    return
endif

// Get the ID of the 1st slot
lnSlotID = loJson.IntOf("slot[0].id")

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

// Call FindAllCerts to find all certificates on the smart card or USB token.
llSuccess = loPkcs11.FindAllCerts()
if (llSuccess = .F.) then
    ? loPkcs11.LastErrorText
    llSuccess = loPkcs11.CloseSession()
    release loPkcs11
    release loJson
    return
endif

// The NumCerts property is set by FindAllCerts.
lnNumCerts = loPkcs11.NumCerts
? "Number of certs: " + str(lnNumCerts)

loCert = createobject("CkCert")
i = 0
do while i < lnNumCerts
    loPkcs11.GetCert(i,loCert)
    lcPrivateKeyNote = ""
    if (loCert.HasPrivateKey() = .T.) then
        lcPrivateKeyNote = "(has private key)"
    endif

    ? str(i) + ": " + lcPrivateKeyNote + " " + loCert.SubjectDN
    ? str(i) + ": issuer: " + loCert.IssuerDN
    ? "----"
    i = i + 1
enddo

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

? "Success."


release loPkcs11
release loJson
release loCert