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101 lines
2.2 KiB
C++
101 lines
2.2 KiB
C++
/*
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* Copyright (c) 2020-2021, 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/ByteString.h>
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#include <LibFileSystem/FileSystem.h>
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#include <LibTest/TestCase.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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TEST_CASE(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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EXPECT(fd != -1);
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ftruncate(fd, 0);
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EXPECT(fchmod(fd, 06755) != -1);
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char buffer[8] {};
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write(fd, buffer, sizeof(buffer));
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struct stat s;
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EXPECT(fstat(fd, &s) != -1);
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close(fd);
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unlink(path);
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EXPECT(!(s.st_mode & S_ISUID));
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EXPECT(!(s.st_mode & S_ISGID));
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}
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TEST_CASE(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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EXPECT(fd != -1);
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ftruncate(fd, 0);
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EXPECT(fchmod(fd, 06755) != -1);
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fchown(fd, getuid(), getgid());
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struct stat s;
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EXPECT(fstat(fd, &s) != -1);
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close(fd);
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unlink(path);
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EXPECT(!(s.st_mode & S_ISUID));
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EXPECT(!(s.st_mode & S_ISGID));
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}
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TEST_CASE(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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EXPECT(fd != -1);
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ftruncate(fd, 0);
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EXPECT(fchmod(fd, 06755) != -1);
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fchmod(fd, 0755);
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struct stat s;
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EXPECT(fstat(fd, &s) != -1);
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close(fd);
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unlink(path);
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EXPECT(!(s.st_mode & S_ISUID));
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EXPECT(!(s.st_mode & S_ISGID));
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}
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TEST_CASE(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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EXPECT(fd != -1);
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ftruncate(fd, 0);
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EXPECT(fchmod(fd, 06755) != -1);
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auto suid_path = TRY_OR_FAIL(FileSystem::read_link(ByteString::formatted("/proc/{}/fd/{}", getpid(), fd)));
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EXPECT(suid_path.characters());
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auto new_path = ByteString::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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EXPECT(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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EXPECT(s.st_mode & S_ISUID);
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EXPECT(s.st_mode & S_ISGID);
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unlink(new_path.characters());
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}
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