1 /*
2 __ __ _
3 ___\ \/ /_ __ __ _| |_
4 / _ \\ /| '_ \ / _` | __|
5 | __// \| |_) | (_| | |_
6 \___/_/\_\ .__/ \__,_|\__|
7 |_| XML parser
8
9 Copyright (c) 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 SPDX-License-Identifier: MIT
33 */
34
35 #include "random_getentropy.h"
36
37 // NOTE: Please keep this block in sync with its two siblings in files
38 // `configure.ac` and `ConfigureChecks.cmake`!
39 #if defined(__APPLE__)
40 # include <sys/random.h>
41 #else
42 # if defined(__GLIBC__) && ! defined(_DEFAULT_SOURCE)
43 # define _DEFAULT_SOURCE 1
44 # endif
45 # if ! defined(_GNU_SOURCE)
46 # define _GNU_SOURCE 1 /* for musl */
47 # endif
48 # include <unistd.h>
49 #endif // ! defined(__APPLE__)
50
51 #include "memory_sanitizer.h"
52 #include <errno.h>
53
54 bool
writeRandomBytes_getentropy(void * target,size_t count)55 writeRandomBytes_getentropy(void *target, size_t count) {
56 errno = 0;
57 const bool success = (getentropy(target, count) == 0);
58 // MSan does not understand `getentropy`, so explain its effects
59 if (success)
60 MSAN_UNPOISON(target, count);
61 return success;
62 }
63