[mirror_ubuntu-bionic-kernel.git] / tools / testing / selftests / capabilities / validate_cap.c

// SPDX-License-Identifier: GPL-2.0
#include <cap-ng.h>
#include <linux/capability.h>
#include <stdbool.h>
#include <string.h>
#include <stdio.h>
#include <sys/prctl.h>
#include <sys/auxv.h>

#include "../kselftest.h"

#ifndef PR_CAP_AMBIENT
#define PR_CAP_AMBIENT			47
# define PR_CAP_AMBIENT_IS_SET		1
# define PR_CAP_AMBIENT_RAISE		2
# define PR_CAP_AMBIENT_LOWER		3
# define PR_CAP_AMBIENT_CLEAR_ALL	4
#endif

#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19)
# define HAVE_GETAUXVAL
#endif

static bool bool_arg(char **argv, int i)
{
	if (!strcmp(argv[i], "0"))
		return false;
	else if (!strcmp(argv[i], "1"))
		return true;
	else {
		ksft_exit_fail_msg("wrong argv[%d]\n", i);
		return false;
	}
}

int main(int argc, char **argv)
{
	const char *atsec = "";

	/*
	 * Be careful just in case a setgid or setcapped copy of this
	 * helper gets out.
	 */

	if (argc != 5)
		ksft_exit_fail_msg("wrong argc\n");

#ifdef HAVE_GETAUXVAL
	if (getauxval(AT_SECURE))
		atsec = " (AT_SECURE is set)";
	else
		atsec = " (AT_SECURE is not set)";
#endif

	capng_get_caps_process();

	if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
		ksft_print_msg("Wrong effective state%s\n", atsec);
		return 1;
	}

	if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, 2)) {
		ksft_print_msg("Wrong permitted state%s\n", atsec);
		return 1;
	}

	if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 3)) {
		ksft_print_msg("Wrong inheritable state%s\n", atsec);
		return 1;
	}

	if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, 4)) {
		ksft_print_msg("Wrong ambient state%s\n", atsec);
		return 1;
	}

	ksft_print_msg("%s: Capabilities after execve were correct\n",
			"validate_cap:");
	return 0;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
32ae976e	2	#include <cap-ng.h>
32ae976e AL	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
7d005195 SK	10	#include "../kselftest.h"
7d005195 SK	11
32ae976e AL	12	#ifndef PR_CAP_AMBIENT
	13	#define PR_CAP_AMBIENT 47
	14	# define PR_CAP_AMBIENT_IS_SET 1
	15	# define PR_CAP_AMBIENT_RAISE 2
	16	# define PR_CAP_AMBIENT_LOWER 3
	17	# define PR_CAP_AMBIENT_CLEAR_ALL 4
	18	#endif
	19
	20	#if __GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19)
	21	# define HAVE_GETAUXVAL
	22	#endif
	23
	24	static bool bool_arg(char **argv, int i)
	25	{
	26	if (!strcmp(argv[i], "0"))
	27	return false;
	28	else if (!strcmp(argv[i], "1"))
	29	return true;
3c1f619e SK	30	else {
	31	ksft_exit_fail_msg("wrong argv[%d]\n", i);
	32	return false;
	33	}
32ae976e AL	34	}
	35
	36	int main(int argc, char **argv)
	37	{
	38	const char *atsec = "";
	39
	40	/*
	41	* Be careful just in case a setgid or setcapped copy of this
	42	* helper gets out.
	43	*/
	44
	45	if (argc != 5)
3c1f619e	46	ksft_exit_fail_msg("wrong argc\n");
32ae976e AL	47
	48	#ifdef HAVE_GETAUXVAL
	49	if (getauxval(AT_SECURE))
	50	atsec = " (AT_SECURE is set)";
	51	else
	52	atsec = " (AT_SECURE is not set)";
	53	#endif
	54
	55	capng_get_caps_process();
	56
	57	if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
7d005195	58	ksft_print_msg("Wrong effective state%s\n", atsec);
32ae976e AL	59	return 1;
32ae976e AL	60	}
7d005195	61
32ae976e	62	if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, 2)) {
7d005195	63	ksft_print_msg("Wrong permitted state%s\n", atsec);
32ae976e AL	64	return 1;
32ae976e AL	65	}
7d005195	66
32ae976e	67	if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 3)) {
7d005195	68	ksft_print_msg("Wrong inheritable state%s\n", atsec);
32ae976e AL	69	return 1;
	70	}
	71
	72	if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, 4)) {
7d005195	73	ksft_print_msg("Wrong ambient state%s\n", atsec);
32ae976e AL	74	return 1;
	75	}
	76
7d005195 SK	77	ksft_print_msg("%s: Capabilities after execve were correct\n",
7d005195 SK	78	"validate_cap:");
32ae976e AL	79	return 0;
32ae976e AL	80	}