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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <stdio.h>
#include <sys/prctl.h>
#include "alloc-util.h"
#include "cap-list.h"
#include "capability-util.h"
#include "parse-util.h"
#include "random-util.h"
#include "string-util.h"
#include "strv.h"
#include "tests.h"
/* verify the capability parser */
TEST(cap_list) {
assert_se(!capability_to_name(-1));
assert_se(!capability_to_name(capability_list_length()));
assert_se(!capability_to_name(63));
assert_se(!capability_to_name(64));
assert_se(!CAPABILITY_TO_STRING(-1));
if (capability_list_length() <= 62)
assert_se(streq(CAPABILITY_TO_STRING(62), "0x3e"));
assert_se(!CAPABILITY_TO_STRING(64));
for (int i = 0; i < capability_list_length(); i++) {
const char *n;
assert_se(n = capability_to_name(i));
assert_se(capability_from_name(n) == i);
printf("%s = %i\n", n, i);
assert_se(streq(CAPABILITY_TO_STRING(i), n));
}
assert_se(capability_from_name("asdfbsd") == -EINVAL);
assert_se(capability_from_name("CAP_AUDIT_READ") == CAP_AUDIT_READ);
assert_se(capability_from_name("cap_audit_read") == CAP_AUDIT_READ);
assert_se(capability_from_name("cAp_aUdIt_rEAd") == CAP_AUDIT_READ);
assert_se(capability_from_name("0") == 0);
assert_se(capability_from_name("15") == 15);
assert_se(capability_from_name("62") == 62);
assert_se(capability_from_name("63") == -EINVAL);
assert_se(capability_from_name("64") == -EINVAL);
assert_se(capability_from_name("-1") == -EINVAL);
for (int i = 0; i < capability_list_length(); i++) {
_cleanup_cap_free_charp_ char *a = NULL;
const char *b;
unsigned u;
assert_se(a = cap_to_name(i));
/* quit the loop as soon as libcap starts returning
* numeric ids, formatted as strings */
if (safe_atou(a, &u) >= 0)
break;
assert_se(b = capability_to_name(i));
printf("%s vs. %s\n", a, b);
assert_se(strcasecmp(a, b) == 0);
}
}
static void test_capability_set_one(uint64_t c, const char *t) {
_cleanup_free_ char *t1 = NULL;
uint64_t c1, c_masked = c & all_capabilities();
assert_se(capability_set_to_string(c, &t1) == 0);
assert_se(streq(t1, t));
assert_se(capability_set_from_string(t1, &c1) > 0);
assert_se(c1 == c_masked);
free(t1);
assert_se(t1 = strjoin("'cap_chown cap_dac_override' \"cap_setgid cap_setuid\"", t,
" hogehoge foobar 18446744073709551616 3.14 -3 ", t));
assert_se(capability_set_from_string(t1, &c1) == 0);
assert_se(c1 == c_masked);
}
TEST(capability_set_from_string) {
uint64_t c;
assert_se(capability_set_from_string(NULL, &c) > 0);
assert_se(c == 0);
assert_se(capability_set_from_string("", &c) > 0);
assert_se(c == 0);
assert_se(capability_set_from_string("0", &c) > 0);
assert_se(c == UINT64_C(1));
assert_se(capability_set_from_string("1", &c) > 0);
assert_se(c == UINT64_C(1) << 1);
assert_se(capability_set_from_string("0 1 2 3", &c) > 0);
assert_se(c == (UINT64_C(1) << 4) - 1);
}
static void test_capability_set_to_strv_one(uint64_t m, char **l) {
_cleanup_strv_free_ char **b = NULL;
assert_se(capability_set_to_strv(m, &b) >= 0);
assert_se(strv_equal(l, b));
}
TEST(capability_set_to_strv) {
test_capability_set_to_strv_one(0, STRV_MAKE(NULL));
test_capability_set_to_strv_one(UINT64_C(1) << CAP_MKNOD, STRV_MAKE("cap_mknod"));
test_capability_set_to_strv_one((UINT64_C(1) << CAP_MKNOD) |
(UINT64_C(1) << CAP_NET_BIND_SERVICE), STRV_MAKE("cap_net_bind_service", "cap_mknod"));
test_capability_set_to_strv_one((UINT64_C(1) << CAP_MKNOD) |
(UINT64_C(1) << CAP_NET_BIND_SERVICE) |
(UINT64_C(1) << CAP_IPC_OWNER), STRV_MAKE("cap_net_bind_service", "cap_ipc_owner", "cap_mknod"));
}
static void test_capability_set_to_string_invalid(uint64_t invalid_cap_set) {
uint64_t c;
test_capability_set_one(invalid_cap_set, "");
c = (UINT64_C(1) << CAP_DAC_OVERRIDE | invalid_cap_set);
test_capability_set_one(c, "cap_dac_override");
c = (UINT64_C(1) << CAP_CHOWN |
UINT64_C(1) << CAP_DAC_OVERRIDE |
UINT64_C(1) << CAP_DAC_READ_SEARCH |
UINT64_C(1) << CAP_FOWNER |
UINT64_C(1) << CAP_SETGID |
UINT64_C(1) << CAP_SETUID |
UINT64_C(1) << CAP_SYS_PTRACE |
UINT64_C(1) << CAP_SYS_ADMIN |
UINT64_C(1) << CAP_AUDIT_CONTROL |
UINT64_C(1) << CAP_MAC_OVERRIDE |
UINT64_C(1) << CAP_SYSLOG |
invalid_cap_set);
test_capability_set_one(c, ("cap_chown cap_dac_override cap_dac_read_search cap_fowner "
"cap_setgid cap_setuid cap_sys_ptrace cap_sys_admin "
"cap_audit_control cap_mac_override cap_syslog"));
}
TEST(capability_set_to_string) {
test_capability_set_to_string_invalid(0);
/* once the kernel supports 62 caps, there are no 'invalid' numbers
* for us to test with */
if (cap_last_cap() < 62)
test_capability_set_to_string_invalid(all_capabilities() + 1);
}
TEST(capability_set_to_string_negative) {
for (unsigned i = 0; i < 150; i++) {
_cleanup_free_ char *a = NULL, *b = NULL;
uint64_t m =
random_u64() % (UINT64_C(1) << (cap_last_cap() + 1));
assert_se(capability_set_to_string(m, &a) >= 0);
assert_se(capability_set_to_string_negative(m, &b) >= 0);
printf("%s (%zu) → ", a, strlen(a));
if (streq(a, b))
printf("same\n");
else
printf("%s (%zu)\n", b, strlen(b));
assert_se(strlen(b) <= strlen(a));
}
}
DEFINE_TEST_MAIN(LOG_INFO);
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