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diff --git a/src/Common/libzip/zip_random_unix.c b/src/Common/libzip/zip_random_unix.c
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+/*
+ zip_random_unix.c -- fill the user's buffer with random stuff (Unix version)
+ Copyright (C) 2016-2021 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>
+
+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));
+ }
+
+ return (zip_uint32_t)random();
+}
+#endif
+
+#endif /* HAVE_ARC4RANDOM */