mirror of https://github.com/PCSX2/pcsx2.git
111 lines
2.9 KiB
C
111 lines
2.9 KiB
C
/*
|
|
zip_random_unix.c -- fill the user's buffer with random stuff (Unix version)
|
|
Copyright (C) 2016-2023 Dieter Baron and Thomas Klausner
|
|
|
|
This file is part of libzip, a library to manipulate ZIP archives.
|
|
The authors can be contacted at <info@libzip.org>
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
1. Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the
|
|
distribution.
|
|
3. The names of the authors may not be used to endorse or promote
|
|
products derived from this software without specific prior
|
|
written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
|
|
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
|
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
|
|
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
|
|
IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "zipint.h"
|
|
|
|
#ifdef HAVE_CRYPTO
|
|
#include "zip_crypto.h"
|
|
#endif
|
|
|
|
#ifdef HAVE_ARC4RANDOM
|
|
|
|
#include <stdlib.h>
|
|
|
|
#ifndef HAVE_SECURE_RANDOM
|
|
ZIP_EXTERN bool
|
|
zip_secure_random(zip_uint8_t *buffer, zip_uint16_t length) {
|
|
arc4random_buf(buffer, length);
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAVE_RANDOM_UINT32
|
|
zip_uint32_t
|
|
zip_random_uint32(void) {
|
|
return arc4random();
|
|
}
|
|
#endif
|
|
|
|
#else /* HAVE_ARC4RANDOM */
|
|
|
|
#ifndef HAVE_SECURE_RANDOM
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
ZIP_EXTERN bool
|
|
zip_secure_random(zip_uint8_t *buffer, zip_uint16_t length) {
|
|
int fd;
|
|
|
|
if ((fd = open("/dev/urandom", O_RDONLY)) < 0) {
|
|
return false;
|
|
}
|
|
|
|
if (read(fd, buffer, length) != length) {
|
|
close(fd);
|
|
return false;
|
|
}
|
|
|
|
close(fd);
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAVE_RANDOM_UINT32
|
|
#include <stdlib.h>
|
|
|
|
#ifndef HAVE_RANDOM
|
|
#define srandom srand
|
|
#define random rand
|
|
#endif
|
|
|
|
zip_uint32_t
|
|
zip_random_uint32(void) {
|
|
static bool seeded = false;
|
|
|
|
zip_uint32_t value;
|
|
|
|
if (zip_secure_random((zip_uint8_t *)&value, sizeof(value))) {
|
|
return value;
|
|
}
|
|
|
|
if (!seeded) {
|
|
srandom((unsigned int)time(NULL));
|
|
seeded = true;
|
|
}
|
|
|
|
return (zip_uint32_t)random();
|
|
}
|
|
#endif
|
|
|
|
#endif /* HAVE_ARC4RANDOM */
|