(C++) 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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#include <CkPkcs11.h>
#include <CkJsonObject.h>
#include <CkSshKey.h>

void ChilkatSample(void)
    {
    // 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.

    CkPkcs11 pkcs11;

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

    // Use your HSM's PIN.
    const char *pin = "0000";

    // Normal user = 1
    int userType = 1;

    // Establish a logged-on user session with the HSM.
    bool success = pkcs11.QuickSession(userType,pin);
    if (success == false) {
        std::cout << pkcs11.lastErrorText() << "\r\n";
        return;
    }

    // Create a PKCS11 template for importing the SSH key.
    CkJsonObject jsonTemplate;

    // Indicate the key is to be stored on the token (i.e. it is not a session-only key)
    jsonTemplate.UpdateBool("token",true);
    // The key should have the ability to sign
    jsonTemplate.UpdateBool("sign",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.UpdateString("id_hex","0A0B0C0D01020304");

    // Optionally specify a label.
    jsonTemplate.UpdateString("label","MySshKey");

    // Load the SSH key to be imported to the HSM (smartcard or token)
    CkSshKey sshKey;
    sshKey.put_Password("password_of_the_encrypted_ppk_file");
    const char *ppkContents = sshKey.loadText("c:/my_ssh_keys/someSshKey.ppk");
    success = sshKey.FromPuttyPrivateKey(ppkContents);
    if (success == false) {
        std::cout << sshKey.lastErrorText() << "\r\n";
        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.
    unsigned long privKeyHandle = pkcs11.ImportSshKey(sshKey,jsonTemplate);
    if (privKeyHandle == 0) {
        std::cout << pkcs11.lastErrorText() << "\r\n";
        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
    std::cout << "private key handle: " << privKeyHandle << "\r\n";

    std::cout << "Successfully imported the SSH key onto the HSM." << "\r\n";

    pkcs11.Logout();
    pkcs11.CloseSession();
    }