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ebc815cd1c
This test assumes capability_list_length() is an invalid cap number, but that isn't true if the running kernel supports more caps than we were compiled with, which results in the test failing. Instead use cap_last_cap() + 1. If cap_last_cap() is 63, there are no more 'invalid' cap numbers to test with, so the invalid cap number test part is skipped.
129 lines
4.4 KiB
C
129 lines
4.4 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <stdio.h>
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#include <sys/prctl.h>
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#include "alloc-util.h"
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#include "cap-list.h"
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#include "capability-util.h"
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#include "parse-util.h"
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#include "string-util.h"
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#include "util.h"
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/* verify the capability parser */
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static void test_cap_list(void) {
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assert_se(!capability_to_name(-1));
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assert_se(!capability_to_name(capability_list_length()));
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for (int i = 0; i < capability_list_length(); i++) {
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const char *n;
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assert_se(n = capability_to_name(i));
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assert_se(capability_from_name(n) == i);
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printf("%s = %i\n", n, i);
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}
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assert_se(capability_from_name("asdfbsd") == -EINVAL);
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assert_se(capability_from_name("CAP_AUDIT_READ") == CAP_AUDIT_READ);
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assert_se(capability_from_name("cap_audit_read") == CAP_AUDIT_READ);
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assert_se(capability_from_name("cAp_aUdIt_rEAd") == CAP_AUDIT_READ);
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assert_se(capability_from_name("0") == 0);
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assert_se(capability_from_name("15") == 15);
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assert_se(capability_from_name("63") == 63);
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assert_se(capability_from_name("64") == -EINVAL);
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assert_se(capability_from_name("-1") == -EINVAL);
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for (int i = 0; i < capability_list_length(); i++) {
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_cleanup_cap_free_charp_ char *a = NULL;
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const char *b;
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unsigned u;
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assert_se(a = cap_to_name(i));
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/* quit the loop as soon as libcap starts returning
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* numeric ids, formatted as strings */
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if (safe_atou(a, &u) >= 0)
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break;
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assert_se(b = capability_to_name(i));
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printf("%s vs. %s\n", a, b);
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assert_se(strcasecmp(a, b) == 0);
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}
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}
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static void test_capability_set_one(uint64_t c, const char *t) {
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_cleanup_free_ char *t1 = NULL;
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uint64_t c1, c_masked = c & all_capabilities();
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assert_se(capability_set_to_string_alloc(c, &t1) == 0);
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assert_se(streq(t1, t));
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assert_se(capability_set_from_string(t1, &c1) == 0);
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assert_se(c1 == c_masked);
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free(t1);
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assert_se(t1 = strjoin("'cap_chown cap_dac_override' \"cap_setgid cap_setuid\"", t,
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" hogehoge foobar 18446744073709551616 3.14 -3 ", t));
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assert_se(capability_set_from_string(t1, &c1) == 0);
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assert_se(c1 == c_masked);
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}
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static void test_capability_set_from_string(void) {
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uint64_t c;
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assert_se(capability_set_from_string(NULL, &c) == 0);
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assert_se(c == 0);
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assert_se(capability_set_from_string("", &c) == 0);
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assert_se(c == 0);
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assert_se(capability_set_from_string("0", &c) == 0);
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assert_se(c == UINT64_C(1));
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assert_se(capability_set_from_string("1", &c) == 0);
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assert_se(c == UINT64_C(1) << 1);
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assert_se(capability_set_from_string("0 1 2 3", &c) == 0);
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assert_se(c == (UINT64_C(1) << 4) - 1);
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}
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static void test_capability_set_to_string(uint64_t invalid_cap_set) {
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uint64_t c;
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test_capability_set_one(invalid_cap_set, "");
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c = (UINT64_C(1) << CAP_DAC_OVERRIDE | invalid_cap_set);
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test_capability_set_one(c, "cap_dac_override");
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c = (UINT64_C(1) << CAP_CHOWN |
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UINT64_C(1) << CAP_DAC_OVERRIDE |
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UINT64_C(1) << CAP_DAC_READ_SEARCH |
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UINT64_C(1) << CAP_FOWNER |
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UINT64_C(1) << CAP_SETGID |
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UINT64_C(1) << CAP_SETUID |
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UINT64_C(1) << CAP_SYS_PTRACE |
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UINT64_C(1) << CAP_SYS_ADMIN |
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UINT64_C(1) << CAP_AUDIT_CONTROL |
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UINT64_C(1) << CAP_MAC_OVERRIDE |
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UINT64_C(1) << CAP_SYSLOG |
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invalid_cap_set);
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test_capability_set_one(c, ("cap_chown cap_dac_override cap_dac_read_search cap_fowner "
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"cap_setgid cap_setuid cap_sys_ptrace cap_sys_admin "
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"cap_audit_control cap_mac_override cap_syslog"));
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}
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int main(int argc, char *argv[]) {
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test_cap_list();
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test_capability_set_from_string();
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test_capability_set_to_string(0);
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/* once the kernel supports 63 caps, there are no 'invalid' numbers
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* for us to test with */
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if (cap_last_cap() < 63)
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test_capability_set_to_string(all_capabilities() + 1);
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return 0;
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}
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