/* * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved. * * The contents of this file constitute Original Code as defined in and are * subject to the Apple Public Source License Version 1.2 (the 'License'). * You may not use this file except in compliance with the License. Please obtain * a copy of the License at http://www.apple.com/publicsource and read it before * using this file. * * This Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the * specific language governing rights and limitations under the License. */ // // devrandom - RNG operations based on /dev/random // #include <Security/devrandom.h> #include <Security/logging.h> using namespace UnixPlusPlus; namespace Security { // // The common (shared) open file descriptor to /dev/random // ModuleNexus<DevRandomGenerator::Readonly> DevRandomGenerator::mReader; ModuleNexus<DevRandomGenerator::Writable> DevRandomGenerator::mWriter; // // In the current implementation, opening the file descriptor is deferred. // DevRandomGenerator::DevRandomGenerator(bool writable) { } // // Standard generate (directly from /dev/random) // void DevRandomGenerator::random(void *data, size_t length) { try { size_t bytesRead = mReader().read(data, length); if (bytesRead != length) { // short read (shouldn't happen) Syslog::error("DevRandomGenerator: wanted %ld got %ld bytes", length, bytesRead); UnixError::throwMe(EIO); } } catch(const UnixError &uerr) { Syslog::error("DevRandomGenerator: error %d reading /dev/random", uerr.error); throw; } } // // If you opened for writing, you add entropy to the global pool here // void DevRandomGenerator::addEntropy(const void *data, size_t length) { if (mWriter().write(data, length) != length) UnixError::throwMe(EIO); // short write (shouldn't happen) } } // end namespace Security