diff options
Diffstat (limited to 'src/faudit/seccomp.c')
-rw-r--r-- | src/faudit/seccomp.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/faudit/seccomp.c b/src/faudit/seccomp.c new file mode 100644 index 000000000..7b2999467 --- /dev/null +++ b/src/faudit/seccomp.c | |||
@@ -0,0 +1,101 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2014-2016 Firejail Authors | ||
3 | * | ||
4 | * This file is part of firejail project | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License as published by | ||
8 | * the Free Software Foundation; either version 2 of the License, or | ||
9 | * (at your option) any later version. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License along | ||
17 | * with this program; if not, write to the Free Software Foundation, Inc., | ||
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
19 | */ | ||
20 | #include "faudit.h" | ||
21 | |||
22 | #define MAXBUF 4098 | ||
23 | static int extract_seccomp(int *val) { | ||
24 | FILE *fp = fopen("/proc/self/status", "r"); | ||
25 | if (!fp) | ||
26 | return 1; | ||
27 | |||
28 | char buf[MAXBUF]; | ||
29 | while (fgets(buf, MAXBUF, fp)) { | ||
30 | if (strncmp(buf, "Seccomp:\t", 8) == 0) { | ||
31 | char *ptr = buf + 8; | ||
32 | int tmp; | ||
33 | sscanf(ptr, "%d", &tmp); | ||
34 | *val = tmp; | ||
35 | fclose(fp); | ||
36 | return 0; | ||
37 | } | ||
38 | } | ||
39 | |||
40 | fclose(fp); | ||
41 | return 1; | ||
42 | } | ||
43 | |||
44 | void seccomp_test(void) { | ||
45 | int seccomp_status; | ||
46 | int rv = extract_seccomp(&seccomp_status); | ||
47 | |||
48 | if (rv) { | ||
49 | printf("INFO: cannot extract seccomp configuration on this platform.\n"); | ||
50 | return; | ||
51 | } | ||
52 | |||
53 | if (seccomp_status == 0) { | ||
54 | printf("BAD: seccomp disabled. Use \"firejail --seccomp\" to enable it.\n"); | ||
55 | } | ||
56 | else if (seccomp_status == 1) | ||
57 | printf("GOOD: seccomp strict mode - only read, write, _exit, and sigreturn are allowd.\n"); | ||
58 | else if (seccomp_status == 2) { | ||
59 | printf("GOOD: seccomp BPF enabled.\n"); | ||
60 | |||
61 | printf("checking syscalls: "); fflush(0); | ||
62 | printf("mount... "); fflush(0); | ||
63 | syscall_run("mount"); | ||
64 | |||
65 | printf("umount2... "); fflush(0); | ||
66 | syscall_run("umount2"); | ||
67 | |||
68 | printf("ptrace... "); fflush(0); | ||
69 | syscall_run("ptrace"); | ||
70 | |||
71 | printf("swapon... "); fflush(0); | ||
72 | syscall_run("swapon"); | ||
73 | |||
74 | printf("swapoff... "); fflush(0); | ||
75 | syscall_run("swapoff"); | ||
76 | |||
77 | printf("init_module... "); fflush(0); | ||
78 | syscall_run("init_module"); | ||
79 | |||
80 | printf("delete_module... "); fflush(0); | ||
81 | syscall_run("delete_module"); | ||
82 | |||
83 | printf("chroot... "); fflush(0); | ||
84 | syscall_run("chroot"); | ||
85 | |||
86 | printf("pivot_root... "); fflush(0); | ||
87 | syscall_run("pivot_root"); | ||
88 | |||
89 | #if defined(__i386__) || defined(__x86_64__) | ||
90 | printf("iopl... "); fflush(0); | ||
91 | syscall_run("iopl"); | ||
92 | |||
93 | printf("ioperm... "); fflush(0); | ||
94 | syscall_run("ioperm"); | ||
95 | #endif | ||
96 | printf("\n"); | ||
97 | } | ||
98 | else | ||
99 | fprintf(stderr, "Error: unrecognized seccomp mode\n"); | ||
100 | |||
101 | } | ||