1 /* 2 __ __ _ 3 ___\ \/ /_ __ __ _| |_ 4 / _ \\ /| '_ \ / _` | __| 5 | __// \| |_) | (_| | |_ 6 \___/_/\_\ .__/ \__,_|\__| 7 |_| XML parser 8 9 Copyright (c) 2017-2026 Sebastian Pipping <sebastian@pipping.org> 10 Copyright (c) 2026 Matthew Fernandez <matthew.fernandez@gmail.com> 11 Licensed under the MIT license: 12 13 Permission is hereby granted, free of charge, to any person obtaining 14 a copy of this software and associated documentation files (the 15 "Software"), to deal in the Software without restriction, including 16 without limitation the rights to use, copy, modify, merge, publish, 17 distribute, sublicense, and/or sell copies of the Software, and to permit 18 persons to whom the Software is furnished to do so, subject to the 19 following conditions: 20 21 The above copyright notice and this permission notice shall be included 22 in all copies or substantial portions of the Software. 23 24 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 27 NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 28 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 29 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 30 USE OR OTHER DEALINGS IN THE SOFTWARE. 31 */ 32 33 #include "random_arc4random.h" 34 35 #if ! defined(_DEFAULT_SOURCE) 36 # define _DEFAULT_SOURCE 1 /* for glibc */ 37 #endif 38 39 #include <stdint.h> // for uint32_t 40 #include <stdlib.h> // for arc4random 41 #include <string.h> // for memcpy 42 43 void 44 writeRandomBytes_arc4random(void *target, size_t count) { 45 size_t bytesWrittenTotal = 0; 46 47 while (bytesWrittenTotal < count) { 48 const uint32_t random32 = arc4random(); 49 50 size_t toUse = count - bytesWrittenTotal; 51 if (toUse > sizeof(random32)) 52 toUse = sizeof(random32); 53 memcpy((char *)target + bytesWrittenTotal, &random32, toUse); 54 bytesWrittenTotal += toUse; 55 } 56 } 57