(C) PKCS11 Export Public Key from HSM

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Demonstrates how to export a public key from a smartcard or token.

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

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#include <C_CkPkcs11.h>
#include <C_CkJsonObject.h>
#include <C_CkPublicKey.h>

void ChilkatSample(void)
    {
    HCkPkcs11 pkcs11;
    const char *pin;
    int userType;
    BOOL success;
    HCkJsonObject jsonTemplate;
    unsigned long pubKeyHandle;
    HCkPublicKey pubKey;

    // 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 = CkPkcs11_Create();

    // Use the PKCS11 driver (.dll, .so, .dylib) for your particular HSM.
    // (The format of the path will change with the operating system.  Obviously, "C:/" is not used on non-Windows systems.
    CkPkcs11_putSharedLibPath(pkcs11,"C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.dll");

    // Establish a logged-on session. (We can typically skip the login by passing an empty PIN if only working with public keys)
    // Use your actual PIN here, or an empty string to skip login.
    pin = "0000";
    userType = 1;
    success = CkPkcs11_QuickSession(pkcs11,userType,pin);
    if (success == FALSE) {
        printf("%s\n",CkPkcs11_lastErrorText(pkcs11));
        CkPkcs11_Dispose(pkcs11);
        return;
    }

    // Get the handle of the public key we wish to export.
    // You can find public keys in many different ways.
    // This example will search for a public key by label.

    // Provide a template to find a PKCS11 object.
    jsonTemplate = CkJsonObject_Create();

    // Find the public key with the label "Belgium eHealth".
    CkJsonObject_UpdateString(jsonTemplate,"class","public_key");
    CkJsonObject_UpdateString(jsonTemplate,"label","Belgium eHealth");

    pubKeyHandle = CkPkcs11_FindObject(pkcs11,jsonTemplate);
    if (pubKeyHandle == 0) {
        printf("%s\n",CkPkcs11_lastErrorText(pkcs11));
        CkPkcs11_Dispose(pkcs11);
        CkJsonObject_Dispose(jsonTemplate);
        return;
    }

    // Export to a Chilkat public key object.
    pubKey = CkPublicKey_Create();
    success = CkPkcs11_ExportPublicKey(pkcs11,pubKeyHandle,pubKey);
    if (success == FALSE) {
        printf("%s\n",CkPkcs11_lastErrorText(pkcs11));
        CkPkcs11_Dispose(pkcs11);
        CkJsonObject_Dispose(jsonTemplate);
        CkPublicKey_Dispose(pubKey);
        return;
    }

    // Get the public key as PKCS8 PEM.
    printf("%s\n",CkPublicKey_getPem(pubKey,FALSE));

    CkPkcs11_Logout(pkcs11);
    CkPkcs11_CloseSession(pkcs11);


    CkPkcs11_Dispose(pkcs11);
    CkJsonObject_Dispose(jsonTemplate);
    CkPublicKey_Dispose(pubKey);

    }