/* * 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> using namespace UnixPlusPlus; namespace Security { // // The common (shared) open file descriptor to /dev/random // ModuleNexus<FileDesc> DevRandomGenerator::mDevRandom; // // DevRandomGenerator objects immediately open their file descriptors // DevRandomGenerator::DevRandomGenerator(bool writable) { FileDesc &fd = mDevRandom(); if (!fd) { fd.open("/dev/random", writable ? O_RDWR : O_RDONLY); } else if (writable && !fd.isWritable()) { FileDesc newFd("/dev/random", O_RDWR); fd.close(); fd = newFd; } } // // Standard generate (directly from /dev/random) // void DevRandomGenerator::random(void *data, size_t length) { mDevRandom().read(data, length); } // // If you opened for writing, you add entropy to the global pool here // void DevRandomGenerator::addEntropy(const void *data, size_t length) { mDevRandom().write(data, length); } } // end namespace Security