Go

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.

Go

    success := 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.

    pkcs11 := chilkat.NewPkcs11()

    // 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.SetSharedLibPath("aetpkss1.dll")

    success = pkcs11.Initialize()
    if success == false {
        fmt.Println(pkcs11.LastErrorText())
        pkcs11.DisposePkcs11()
        return
    }

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

    // Open a session.
    readWrite := true
    success = pkcs11.OpenSession(slotID,readWrite)
    if success == false {
        fmt.Println(pkcs11.LastErrorText())
        pkcs11.DisposePkcs11()
        return
    }

    // 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".
    userType := 1
    pin := "0000"
    success = pkcs11.Login(userType,pin)
    if success == false {
        fmt.Println(pkcs11.LastErrorText())
        success = pkcs11.CloseSession()
        pkcs11.DisposePkcs11()
        return
    }

    // Call FindAllCerts to find all certificates on the smart card or USB token.
    success = pkcs11.FindAllCerts()
    if success == false {
        fmt.Println(pkcs11.LastErrorText())
        success = pkcs11.CloseSession()
        pkcs11.DisposePkcs11()
        return
    }

    // The NumCerts property is set by FindAllCerts.
    numCerts := pkcs11.NumCerts()
    fmt.Println("Number of certs: ", numCerts)

    var privateKeyNote string
    cert := chilkat.NewCert()
    i := 0
    for i < numCerts {
        pkcs11.GetCert(i,cert)
        privateKeyNote = ""
        if cert.HasPrivateKey() == true {
            privateKeyNote = "(has private key)"
        }

        fmt.Println(i, ": ", privateKeyNote, " ", cert.SubjectDN())
        fmt.Println(i, ": issuer: ", cert.IssuerDN())
        fmt.Println("----")
        i = i + 1
    }

    // Revert to an unauthenticated session by calling Logout.
    success = pkcs11.Logout()
    if success == false {
        fmt.Println(pkcs11.LastErrorText())
        success = pkcs11.CloseSession()
        pkcs11.DisposePkcs11()
        cert.DisposeCert()
        return
    }

    // 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 {
        fmt.Println(pkcs11.LastErrorText())
        pkcs11.DisposePkcs11()
        cert.DisposeCert()
        return
    }

    fmt.Println("Success.")

    pkcs11.DisposePkcs11()
    cert.DisposeCert()