SecurityServer/MacYarrow/yarrowseed.cpp

   1 /*
   2  * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 //
  20 // yarrowseed - periodical to collect and seed entropy into /dev/random
  21 //
  22 #include "yarrowseed.h"
  23 #include "MacYarrow_OSX.h"
  24
  25
  26 //
  27 // Constructor initializes the entropy generator and schedules itself
  28 //
  29 YarrowTimer::YarrowTimer(MachPlusPlus::MachServer &srv, const char *entropyFile)
  30     : MachServer::Timer(), server(srv)
  31 {
  32     unsigned firstTimeout;
  33 #if correct
  34     if (OSStatus err = yarrowServerInit(entropyFile, &firstTimeout))
  35         MacOSError::throwMe(err);
  36 #else
  37     yarrowServerInit(entropyFile, &firstTimeout);
  38 #endif
  39     server.setTimer(this, Time::Interval(firstTimeout / 1000.0));
  40 }
  41
  42
  43 /*
  44  * Timeout event, the sole purpose of this class. Pass on to MacYarrow module.
  45  */
  46 void YarrowTimer::action()
  47 {
  48         unsigned nextTimeout = yarrowTimerEvent();
  49         scheduleTimer(nextTimeout);
  50 }
  51
  52 void YarrowTimer::scheduleTimer(unsigned msFromNow)
  53 {
  54     server.setTimer(this, Time::Interval(msFromNow / 1000.0));
  55 }