1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <cap-ng.h> |
3 | #include <linux/capability.h> |
4 | #include <stdbool.h> |
5 | #include <string.h> |
6 | #include <stdio.h> |
7 | #include <sys/prctl.h> |
8 | #include <sys/auxv.h> |
9 | |
10 | #include "../kselftest.h" |
11 | |
12 | #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19) |
13 | # define HAVE_GETAUXVAL |
14 | #endif |
15 | |
16 | static bool bool_arg(char **argv, int i) |
17 | { |
18 | if (!strcmp(argv[i], "0" )) |
19 | return false; |
20 | else if (!strcmp(argv[i], "1" )) |
21 | return true; |
22 | else { |
23 | ksft_exit_fail_msg(msg: "wrong argv[%d]\n" , i); |
24 | return false; |
25 | } |
26 | } |
27 | |
28 | int main(int argc, char **argv) |
29 | { |
30 | const char *atsec = "" ; |
31 | |
32 | /* |
33 | * Be careful just in case a setgid or setcapped copy of this |
34 | * helper gets out. |
35 | */ |
36 | |
37 | if (argc != 5) |
38 | ksft_exit_fail_msg(msg: "wrong argc\n" ); |
39 | |
40 | #ifdef HAVE_GETAUXVAL |
41 | if (getauxval(AT_SECURE)) |
42 | atsec = " (AT_SECURE is set)" ; |
43 | else |
44 | atsec = " (AT_SECURE is not set)" ; |
45 | #endif |
46 | |
47 | capng_get_caps_process(); |
48 | |
49 | if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, i: 1)) { |
50 | ksft_print_msg(msg: "Wrong effective state%s\n" , atsec); |
51 | return 1; |
52 | } |
53 | |
54 | if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, i: 2)) { |
55 | ksft_print_msg(msg: "Wrong permitted state%s\n" , atsec); |
56 | return 1; |
57 | } |
58 | |
59 | if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, i: 3)) { |
60 | ksft_print_msg(msg: "Wrong inheritable state%s\n" , atsec); |
61 | return 1; |
62 | } |
63 | |
64 | if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, i: 4)) { |
65 | ksft_print_msg(msg: "Wrong ambient state%s\n" , atsec); |
66 | return 1; |
67 | } |
68 | |
69 | ksft_print_msg(msg: "%s: Capabilities after execve were correct\n" , |
70 | "validate_cap:" ); |
71 | return 0; |
72 | } |
73 | |