Creates a new {@code ECPrivateKeySpec} with the specified private value
{@code S} and parameter specification.
this.s = s;
this.params = params;
// throw NullPointerException if s or params is null
if (this.s == null) {
throw new NullPointerException(Messages.getString("security.83", "s")); //$NON-NLS-1$ //$NON-NLS-2$
}
if (this.params == null) {
throw new NullPointerException(Messages.getString("security.83", "params")); //$NON-NLS-1$ //$NON-NLS-2$
}