security/manager/ssl/nsRandomGenerator.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "nsRandomGenerator.h"
   6
   7 #include "ScopedNSSTypes.h"
   8 #include "nsNSSComponent.h"
   9 #include "pk11pub.h"
  10 #include "prerror.h"
  11 #include "secerr.h"
  12
  13 NS_IMPL_ISUPPORTS(nsRandomGenerator, nsIRandomGenerator)
  14
  15 NS_IMETHODIMP
  16 nsRandomGenerator::GenerateRandomBytes(uint32_t aLength, uint8_t** aBuffer) {
  17   NS_ENSURE_ARG_POINTER(aBuffer);
  18   *aBuffer = nullptr;
  19
  20   mozilla::UniquePK11SlotInfo slot(PK11_GetInternalSlot());
  21   if (!slot) {
  22     return NS_ERROR_FAILURE;
  23   }
  24
  25   auto buf = static_cast<uint8_t*>(moz_xmalloc(aLength));
  26
  27   SECStatus srv = PK11_GenerateRandomOnSlot(slot.get(), buf, aLength);
  28   if (srv != SECSuccess) {
  29     free(buf);
  30     return NS_ERROR_FAILURE;
  31   }
  32
  33   *aBuffer = buf;
  34
  35   return NS_OK;
  36 }