Gck.Session.prototype.derive_key

function derive_key(base: Gck.Object, mech_type: Number(gulong), attrs: Gck.Attributes, cancellable: Gio.Cancellable): Gck.Object {
    // Gjs wrapper for gck_session_derive_key()
}

Derive a key from another key. This call may block for an indefinite period.

If the attrs Gck.Attributes is floating, it is consumed.

base: The key to derive from.
mech_type: The mechanism to use for derivation.
attrs: Additional attributes for the derived key.
cancellable: Optional cancellation object, or NULL.
Returns: the new derived key or NULL if the operation failed