/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Shawn Wilsher <me@shawnwilsher.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsRandomGenerator.h"
#include "pk11pub.h"

////////////////////////////////////////////////////////////////////////////////
//// nsRandomGenerator

NS_IMPL_ISUPPORTS1(nsRandomGenerator, nsIRandomGenerator)

////////////////////////////////////////////////////////////////////////////////
//// nsIRandomGenerator

/* void generateRandomBytes(in unsigned long aLength,
                            [retval, array, size_is(aLength)] out octet aBuffer) */
NS_IMETHODIMP
nsRandomGenerator::GenerateRandomBytes(PRUint32 aLength,
                                       PRUint8 **aBuffer)
{
  NS_ENSURE_ARG_POINTER(aBuffer);

  PRUint8 *buf = reinterpret_cast<PRUint8 *>(NS_Alloc(aLength));
  if (!buf)
    return NS_ERROR_OUT_OF_MEMORY;

  SECStatus srv = PK11_GenerateRandom(buf, aLength);
  if (SECSuccess != srv) {
    NS_Free(buf);
    return NS_ERROR_FAILURE;
  }

  *aBuffer = buf;

  return NS_OK;
}