(Mono C#) PKCS11 Import an Existing AES Key onto the HSM

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Demonstrates how to import an existing AES symmetric encrytion key onto the smartcard/token. The imported AES key is a session object, and only exists for the duration of the PKCS11 session. (AES keys are typically used for wrapping/unwrapping RSA and EC keys.)

Note: This example requires Chilkat v9.5.0.96 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.

Chilkat.Pkcs11 pkcs11 = new Chilkat.Pkcs11();

// 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.
pkcs11.SharedLibPath = "C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.dll";

// Establish a logged-on session.
string pin = "0000";
int userType = 1;
bool success = pkcs11.QuickSession(userType,pin);
if (success == false) {
    Debug.WriteLine(pkcs11.LastErrorText);
    return;
}

// Generate a 256-bit AES key.
// (32 bytes is 256 bits)
// Append 32 bytes of random data in the base64 encoding.
Chilkat.StringBuilder sbAesKey = new Chilkat.StringBuilder();
sbAesKey.AppendRandom(32,"base64");

Chilkat.JsonObject attrs = new Chilkat.JsonObject();
// Specify the type of object, and the type of key.
attrs.UpdateString("class","CKO_SECRET_KEY");
attrs.UpdateString("key_type","CKK_AES");
// Add an optional label if desired.
attrs.UpdateString("label","My AES wrapping/unwrapping key");
// Allow the key to be use for wrapping and unwrapping operations.
attrs.UpdateBool("wrap",true);
attrs.UpdateBool("unwrap",true);

// Provide the AES key material.
attrs.UpdateString("value",sbAesKey.GetAsString());

// Create the object (i.e. create the AES key with the given key material.)
// Returns the PKCS11 object handle of the created AES session key.
uint objHandle = pkcs11.CreatePkcs11Object(attrs);
if (objHandle == 0) {
    Debug.WriteLine(pkcs11.LastErrorText);
    Debug.WriteLine("Failed.");
}
else {
    Debug.WriteLine("PKCS11 object handle = " + Convert.ToString(objHandle));
    Debug.WriteLine("Successfully created a 256-bit AES session key.");
}

// Typically, you would do other things in the PKCS11 session that use the handle of AES key we just created.
// ...
// ...

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