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
16static 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("wrong argv[%d]\n", i);
24		return false;
25	}
26}
27
28int main(int argc, char **argv)
29{
30	const char *atsec = "";
31	int ret;
32
33	/*
34	 * Be careful just in case a setgid or setcapped copy of this
35	 * helper gets out.
36	 */
37
38	if (argc != 5)
39		ksft_exit_fail_msg("wrong argc\n");
40
41#ifdef HAVE_GETAUXVAL
42	if (getauxval(AT_SECURE))
43		atsec = " (AT_SECURE is set)";
44	else
45		atsec = " (AT_SECURE is not set)";
46#endif
47
48	ret = capng_get_caps_process();
49	if (ret == -1) {
50		ksft_print_msg("capng_get_caps_process failed\n");
51		return 1;
52	}
53
54	if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
55		ksft_print_msg("Wrong effective state%s\n", atsec);
56		return 1;
57	}
58
59	if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, 2)) {
60		ksft_print_msg("Wrong permitted state%s\n", atsec);
61		return 1;
62	}
63
64	if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 3)) {
65		ksft_print_msg("Wrong inheritable state%s\n", atsec);
66		return 1;
67	}
68
69	if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, 4)) {
70		ksft_print_msg("Wrong ambient state%s\n", atsec);
71		return 1;
72	}
73
74	ksft_print_msg("%s: Capabilities after execve were correct\n",
75			"validate_cap:");
76	return 0;
77}

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