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/*
* Copyright (C) 2014-2021 Firejail Authors
*
* This file is part of firejail project
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "jailcheck.h"
#include "../include/firejail_user.h"
#include "../include/pid.h"
#include <sys/wait.h>
uid_t user_uid = 0;
gid_t user_gid = 0;
char *user_name = NULL;
char *user_home_dir = NULL;
char *user_run_dir = NULL;
int arg_debug = 0;
static char *usage_str =
"Usage: jailcheck [options] directory [directory]\n\n"
"Options:\n"
" --debug - print debug messages.\n"
" --help, -? - this help screen.\n"
" --version - print program version and exit.\n";
static void usage(void) {
printf("firetest - version %s\n\n", VERSION);
puts(usage_str);
}
static void cleanup(void) {
// running only as root
if (getuid() == 0) {
if (arg_debug)
printf("cleaning up!\n");
access_destroy();
virtual_destroy();
}
}
int main(int argc, char **argv) {
int i;
int findex = 0;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-?") == 0 || strcmp(argv[i], "--help") == 0) {
usage();
return 0;
}
else if (strcmp(argv[i], "--version") == 0) {
printf("firetest version %s\n\n", VERSION);
return 0;
}
else if (strncmp(argv[i], "--hello=", 8) == 0) { // used by noexec test
printf(" Warning: I can run programs in %s\n", argv[i] + 8);
return 0;
}
else if (strcmp(argv[i], "--debug") == 0)
arg_debug = 1;
else if (strncmp(argv[i], "--", 2) == 0) {
fprintf(stderr, "Error: invalid option\n");
return 1;
}
else {
findex = i;
break;
}
}
// user setup
if (getuid() != 0) {
fprintf(stderr, "Error: you need to be root (via sudo) to run this program\n");
exit(1);
}
user_name = get_sudo_user();
assert(user_name);
user_home_dir = get_homedir(user_name, &user_uid, &user_gid);
if (user_uid == 0) {
fprintf(stderr, "Error: root user not supported\n");
exit(1);
}
if (asprintf(&user_run_dir, "/run/user/%d", user_uid) == -1)
errExit("asprintf");
// test setup
atexit(cleanup);
access_setup("~/.ssh");
access_setup("~/.gnupg");
if (findex > 0) {
for (i = findex; i < argc; i++)
access_setup(argv[i]);
}
noexec_setup();
virtual_setup(user_home_dir);
virtual_setup("/tmp");
virtual_setup("/var/tmp");
virtual_setup("/dev");
virtual_setup("/etc");
virtual_setup("/bin");
virtual_setup("/usr/share");
virtual_setup(user_run_dir);
// basic sysfiles
sysfiles_setup("/etc/shadow");
sysfiles_setup("/etc/gshadow");
sysfiles_setup("/usr/bin/mount");
sysfiles_setup("/usr/bin/su");
sysfiles_setup("/usr/bin/ksu");
sysfiles_setup("/usr/bin/sudo");
sysfiles_setup("/usr/bin/strace");
// X11
sysfiles_setup("/usr/bin/xev");
sysfiles_setup("/usr/bin/xinput");
// compilers
sysfiles_setup("/usr/bin/gcc");
sysfiles_setup("/usr/bin/clang");
// networking
sysfiles_setup("/usr/bin/dig");
sysfiles_setup("/usr/bin/nslookup");
sysfiles_setup("/usr/bin/resolvectl");
sysfiles_setup("/usr/bin/nc");
sysfiles_setup("/usr/bin/ncat");
sysfiles_setup("/usr/bin/nmap");
sysfiles_setup("/usr/sbin/tcpdump");
// terminals
sysfiles_setup("/usr/bin/gnome-terminal");
sysfiles_setup("/usr/bin/xfce4-terminal");
sysfiles_setup("/usr/bin/lxterminal");
// print processes
pid_read(0);
for (i = 0; i < max_pids; i++) {
if (pids[i].level == 1) {
uid_t uid = pid_get_uid(i);
if (uid != user_uid) // not interested in other user sandboxes
continue;
// in case the pid is that of a firejail process, use the pid of the first child process
uid_t pid = find_child(i);
printf("\n");
pid_print_list(i, 0); // no wrapping
apparmor_test(pid);
seccomp_test(pid);
fflush(0);
pid_t child = fork();
if (child == -1)
errExit("fork");
if (child == 0) {
int rv = join_namespace(pid, "mnt");
if (rv == 0) {
virtual_test();
noexec_test(user_home_dir);
noexec_test("/tmp");
noexec_test("/var/tmp");
noexec_test(user_run_dir);
access_test();
sysfiles_test();
}
else {
printf(" Error: I cannot join the process mount space\n");
exit(1);
}
// drop privileges in order not to trigger cleanup()
if (setgid(user_gid) != 0)
errExit("setgid");
if (setuid(user_uid) != 0)
errExit("setuid");
return 0;
}
int status;
wait(&status);
}
}
return 0;
}
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