// SPDX-License-Identifier: GPL-2.0
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#include <cap-ng.h>
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#include <linux/capability.h>
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#include <stdbool.h>
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#include <string.h>
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#include <stdio.h>
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#include <sys/prctl.h>
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#include <sys/auxv.h>
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#include "../kselftest.h"
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#ifndef PR_CAP_AMBIENT
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#define PR_CAP_AMBIENT 47
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# define PR_CAP_AMBIENT_IS_SET 1
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# define PR_CAP_AMBIENT_RAISE 2
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# define PR_CAP_AMBIENT_LOWER 3
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# define PR_CAP_AMBIENT_CLEAR_ALL 4
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#endif
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#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19)
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# define HAVE_GETAUXVAL
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#endif
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static bool bool_arg(char **argv, int i)
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{
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if (!strcmp(argv[i], "0"))
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return false;
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else if (!strcmp(argv[i], "1"))
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return true;
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else {
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ksft_exit_fail_msg("wrong argv[%d]\n", i);
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return false;
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}
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}
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int main(int argc, char **argv)
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{
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const char *atsec = "";
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/*
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* Be careful just in case a setgid or setcapped copy of this
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* helper gets out.
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*/
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if (argc != 5)
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ksft_exit_fail_msg("wrong argc\n");
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#ifdef HAVE_GETAUXVAL
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if (getauxval(AT_SECURE))
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atsec = " (AT_SECURE is set)";
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else
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atsec = " (AT_SECURE is not set)";
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#endif
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capng_get_caps_process();
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if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
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ksft_print_msg("Wrong effective state%s\n", atsec);
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return 1;
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}
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if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, 2)) {
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ksft_print_msg("Wrong permitted state%s\n", atsec);
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return 1;
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}
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if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 3)) {
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ksft_print_msg("Wrong inheritable state%s\n", atsec);
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return 1;
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}
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if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, 4)) {
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ksft_print_msg("Wrong ambient state%s\n", atsec);
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return 1;
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}
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ksft_print_msg("%s: Capabilities after execve were correct\n",
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"validate_cap:");
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return 0;
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}
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