(Swift 3,4,5...) Import an SSH Key to an HSM using PKCS11

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Demonstrates how to import an SSH private key to an HSM (smartcard or token).

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

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func chilkatTest() {
    // 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.

    let pkcs11 = CkoPkcs11()!

    // Use the PKCS11 driver (.dll, .so, .dylib) for your particular HSM.
    // For example:
    pkcs11.sharedLibPath = "C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS11.dll"

    // Use your HSM's PIN.
    var pin: String? = "0000"

    // Normal user = 1
    var userType: Int = 1

    // Establish a logged-on user session with the HSM.
    var success: Bool = pkcs11.quickSession(userType, pin: pin)
    if success == false {
        print("\(pkcs11.lastErrorText!)")
        return
    }

    // Create a PKCS11 template for importing the SSH key.
    let jsonTemplate = CkoJsonObject()!

    // Indicate the key is to be stored on the token (i.e. it is not a session-only key)
    jsonTemplate.updateBool("token", value: true)
    // The key should have the ability to sign
    jsonTemplate.updateBool("sign", value: true)

    // Let's provide a few attributes to help us find the this key at a later time.
    // See SSH Public-Key Authentication using an HSM

    // The ID is byte data, so it should be base64 or hex.
    // Specify "id" if passing base64 data, "id_hex" for hexidecimal, or "id_ascii" for directly copying the ascii bytes of the string.
    // You can provide any ID of your choice.  It is optional.
    jsonTemplate.update("id_hex", value: "0A0B0C0D01020304")

    // Optionally specify a label.
    jsonTemplate.update("label", value: "MySshKey")

    // Load the SSH key to be imported to the HSM (smartcard or token)
    let sshKey = CkoSshKey()!
    sshKey.password = "password_of_the_encrypted_ppk_file"
    var ppkContents: String? = sshKey.loadText("c:/my_ssh_keys/someSshKey.ppk")
    success = sshKey.fromPuttyPrivateKey(ppkContents)
    if success == false {
        print("\(sshKey.lastErrorText!)")
        return
    }

    // Import the SSH private key onto the HSM.
    // The PKCS11 handle to the imported private key is returned.
    // A 0 is returned on failure.
    var privKeyHandle: UInt32 = pkcs11.import(sshKey, jsonTemplate: jsonTemplate)
    if privKeyHandle == 0 {
        print("\(pkcs11.lastErrorText!)")
        return
    }

    // The private key handle is only valid during the PKCS11 session.
    // If you wish to use the private key in another PKCS11 session,
    // you'll first need to find it.  See  SSH Public-Key Authentication using a Smartcard
    print("private key handle: \(privKeyHandle)")

    print("Successfully imported the SSH key onto the HSM.")

    pkcs11.logout()
    pkcs11.closeSession()

}