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https://github.com/RGBCube/serenity
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SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
118 lines
2.6 KiB
C++
118 lines
2.6 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/String.h>
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#include <LibCore/File.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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static void test_change_file_contents()
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{
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char path[] = "/tmp/suid.XXXXXX";
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auto fd = mkstemp(path);
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assert(fd != -1);
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ftruncate(fd, 0);
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assert(fchmod(fd, 06755) != -1);
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char buffer[8];
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memset(&buffer, 0, sizeof(buffer));
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write(fd, buffer, sizeof(buffer));
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struct stat s;
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assert(fstat(fd, &s) != -1);
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close(fd);
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unlink(path);
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assert(!(s.st_mode & S_ISUID));
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assert(!(s.st_mode & S_ISGID));
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}
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static void test_change_file_ownership()
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{
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char path[] = "/tmp/suid.XXXXXX";
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auto fd = mkstemp(path);
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assert(fd != -1);
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ftruncate(fd, 0);
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assert(fchmod(fd, 06755) != -1);
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fchown(fd, getuid(), getgid());
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struct stat s;
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assert(fstat(fd, &s) != -1);
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close(fd);
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unlink(path);
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assert(!(s.st_mode & S_ISUID));
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assert(!(s.st_mode & S_ISGID));
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}
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static void test_change_file_permissions()
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{
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char path[] = "/tmp/suid.XXXXXX";
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auto fd = mkstemp(path);
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assert(fd != -1);
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ftruncate(fd, 0);
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assert(fchmod(fd, 06755) != -1);
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fchmod(fd, 0755);
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struct stat s;
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assert(fstat(fd, &s) != -1);
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close(fd);
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unlink(path);
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assert(!(s.st_mode & S_ISUID));
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assert(!(s.st_mode & S_ISGID));
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}
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static void test_change_file_location()
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{
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char path[] = "/tmp/suid.XXXXXX";
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auto fd = mkstemp(path);
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assert(fd != -1);
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ftruncate(fd, 0);
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assert(fchmod(fd, 06755) != -1);
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auto suid_path = Core::File::read_link(String::formatted("/proc/{}/fd/{}", getpid(), fd));
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assert(suid_path.characters());
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auto new_path = String::formatted("{}.renamed", suid_path);
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rename(suid_path.characters(), new_path.characters());
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struct stat s;
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assert(lstat(new_path.characters(), &s) != -1);
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close(fd);
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unlink(path);
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// renamed file should retain set-uid/set-gid permissions
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assert(s.st_mode & S_ISUID);
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assert(s.st_mode & S_ISGID);
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unlink(new_path.characters());
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}
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int main()
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{
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#define RUNTEST(x) \
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{ \
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printf("Running " #x " ...\n"); \
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x(); \
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printf("Success!\n"); \
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}
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RUNTEST(test_change_file_contents);
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RUNTEST(test_change_file_ownership);
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RUNTEST(test_change_file_permissions);
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RUNTEST(test_change_file_location);
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printf("PASS\n");
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return 0;
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}
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