1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0
232ae976eSAndy Lutomirski #include <cap-ng.h>
332ae976eSAndy Lutomirski #include <linux/capability.h>
432ae976eSAndy Lutomirski #include <stdbool.h>
532ae976eSAndy Lutomirski #include <string.h>
632ae976eSAndy Lutomirski #include <stdio.h>
732ae976eSAndy Lutomirski #include <sys/prctl.h>
832ae976eSAndy Lutomirski #include <sys/auxv.h>
932ae976eSAndy Lutomirski
107d005195SShuah Khan #include "../kselftest.h"
117d005195SShuah Khan
1232ae976eSAndy Lutomirski #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19)
1332ae976eSAndy Lutomirski # define HAVE_GETAUXVAL
1432ae976eSAndy Lutomirski #endif
1532ae976eSAndy Lutomirski
bool_arg(char ** argv,int i)1632ae976eSAndy Lutomirski static bool bool_arg(char **argv, int i)
1732ae976eSAndy Lutomirski {
1832ae976eSAndy Lutomirski if (!strcmp(argv[i], "0"))
1932ae976eSAndy Lutomirski return false;
2032ae976eSAndy Lutomirski else if (!strcmp(argv[i], "1"))
2132ae976eSAndy Lutomirski return true;
223c1f619eSShuah Khan else {
233c1f619eSShuah Khan ksft_exit_fail_msg("wrong argv[%d]\n", i);
243c1f619eSShuah Khan return false;
253c1f619eSShuah Khan }
2632ae976eSAndy Lutomirski }
2732ae976eSAndy Lutomirski
main(int argc,char ** argv)2832ae976eSAndy Lutomirski int main(int argc, char **argv)
2932ae976eSAndy Lutomirski {
3032ae976eSAndy Lutomirski const char *atsec = "";
31*b0df3062SAmer Al Shanawany int ret;
3232ae976eSAndy Lutomirski
3332ae976eSAndy Lutomirski /*
3432ae976eSAndy Lutomirski * Be careful just in case a setgid or setcapped copy of this
3532ae976eSAndy Lutomirski * helper gets out.
3632ae976eSAndy Lutomirski */
3732ae976eSAndy Lutomirski
3832ae976eSAndy Lutomirski if (argc != 5)
393c1f619eSShuah Khan ksft_exit_fail_msg("wrong argc\n");
4032ae976eSAndy Lutomirski
4132ae976eSAndy Lutomirski #ifdef HAVE_GETAUXVAL
4232ae976eSAndy Lutomirski if (getauxval(AT_SECURE))
4332ae976eSAndy Lutomirski atsec = " (AT_SECURE is set)";
4432ae976eSAndy Lutomirski else
4532ae976eSAndy Lutomirski atsec = " (AT_SECURE is not set)";
4632ae976eSAndy Lutomirski #endif
4732ae976eSAndy Lutomirski
48*b0df3062SAmer Al Shanawany ret = capng_get_caps_process();
49*b0df3062SAmer Al Shanawany if (ret == -1) {
50*b0df3062SAmer Al Shanawany ksft_print_msg("capng_get_caps_process failed\n");
51*b0df3062SAmer Al Shanawany return 1;
52*b0df3062SAmer Al Shanawany }
5332ae976eSAndy Lutomirski
5432ae976eSAndy Lutomirski if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
557d005195SShuah Khan ksft_print_msg("Wrong effective state%s\n", atsec);
5632ae976eSAndy Lutomirski return 1;
5732ae976eSAndy Lutomirski }
587d005195SShuah Khan
5932ae976eSAndy Lutomirski if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, 2)) {
607d005195SShuah Khan ksft_print_msg("Wrong permitted state%s\n", atsec);
6132ae976eSAndy Lutomirski return 1;
6232ae976eSAndy Lutomirski }
637d005195SShuah Khan
6432ae976eSAndy Lutomirski if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 3)) {
657d005195SShuah Khan ksft_print_msg("Wrong inheritable state%s\n", atsec);
6632ae976eSAndy Lutomirski return 1;
6732ae976eSAndy Lutomirski }
6832ae976eSAndy Lutomirski
6932ae976eSAndy Lutomirski if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, 4)) {
707d005195SShuah Khan ksft_print_msg("Wrong ambient state%s\n", atsec);
7132ae976eSAndy Lutomirski return 1;
7232ae976eSAndy Lutomirski }
7332ae976eSAndy Lutomirski
747d005195SShuah Khan ksft_print_msg("%s: Capabilities after execve were correct\n",
757d005195SShuah Khan "validate_cap:");
7632ae976eSAndy Lutomirski return 0;
7732ae976eSAndy Lutomirski }
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