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chrony/test/unit/ntp_auth.c
Miroslav Lichvar cc535632d1 test: add ntp_auth unit test
2020-09-16 11:15:29 +02:00

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/*
**********************************************************************
* Copyright (C) Miroslav Lichvar 2020
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
**********************************************************************
*/
#include <config.h>
#include <sysincl.h>
#include <conf.h>
#include <keys.h>
#include <local.h>
#include <ntp_ext.h>
#include <ntp_signd.h>
#include <nts_ntp_server.h>
#include <socket.h>
#include "test.h"
#ifdef FEAT_NTP
#include <ntp_auth.c>
static void
prepare_packet(NTP_AuthMode auth_mode, NTP_Packet *packet, NTP_PacketInfo *info, int req)
{
unsigned char buf[64];
int i, version;
NTP_Mode mode;
switch (auth_mode) {
case NTP_AUTH_MSSNTP:
case NTP_AUTH_MSSNTP_EXT:
version = 3;
mode = random() % 2 ? (req ? MODE_CLIENT : MODE_SERVER) :
(req ? MODE_ACTIVE : MODE_PASSIVE);
break;
case NTP_AUTH_NTS:
version = 4;
mode = req ? MODE_CLIENT : MODE_SERVER;
break;
default:
version = 3 + random() % 2;
mode = random() % 2 ? (req ? MODE_CLIENT : MODE_SERVER) :
(req ? MODE_ACTIVE : MODE_PASSIVE);
break;
}
memset(packet, 0, sizeof (*packet));
memset(info, 0, sizeof (*info));
packet->lvm = NTP_LVM(LEAP_Normal, version, mode);
info->length = NTP_HEADER_LENGTH;
info->version = version;
info->mode = mode;
if (version == 4) {
memset(buf, 0, sizeof (buf));
for (i = random() % 5; i > 0; i--)
TEST_CHECK(NEF_AddField(packet, info, 0, buf, sizeof (buf)));
}
}
static void
add_dummy_auth(NTP_AuthMode auth_mode, uint32_t key_id, NTP_Packet *packet, NTP_PacketInfo *info)
{
unsigned char buf[64];
int len, fill;
info->auth.mode = auth_mode;
switch (auth_mode) {
case NTP_AUTH_NONE:
break;
case NTP_AUTH_SYMMETRIC:
case NTP_AUTH_MSSNTP:
case NTP_AUTH_MSSNTP_EXT:
switch (auth_mode) {
case NTP_AUTH_SYMMETRIC:
len = 16 + random() % 2 * 4;
fill = 1 + random() % 255;
break;
case NTP_AUTH_MSSNTP:
len = 16;
fill = 0;
break;
case NTP_AUTH_MSSNTP_EXT:
len = 68;
fill = 0;
break;
default:
assert(0);
}
assert(info->length + 4 + len <= sizeof (*packet));
*(uint32_t *)((unsigned char *)packet + info->length) = htonl(key_id);
info->auth.mac.key_id = key_id;
info->length += 4;
memset((unsigned char *)packet + info->length, fill, len);
info->length += len;
break;
case NTP_AUTH_NTS:
memset(buf, 0, sizeof (buf));
TEST_CHECK(NEF_AddField(packet, info, NTP_EF_NTS_AUTH_AND_EEF, buf, sizeof (buf)));
break;
default:
assert(0);
}
}
void
test_unit(void)
{
int i, j, can_auth_req, can_auth_res;
NTP_PacketInfo req_info, res_info;
NTP_Packet req, res;
NAU_Instance inst;
RPT_AuthReport report;
NTP_AuthMode mode;
IPSockAddr nts_addr;
uint32_t key_id, kod;
char conf[][100] = {
"keyfile ntp_core.keys"
};
CNF_Initialise(0, 0);
for (i = 0; i < sizeof conf / sizeof conf[0]; i++)
CNF_ParseLine(NULL, i + 1, conf[i]);
LCL_Initialise();
TST_SuspendLogging();
KEY_Initialise();
TST_ResumeLogging();
NSD_Initialise();
NNS_Initialise();
SCK_GetAnyLocalIPAddress(IPADDR_INET4, &nts_addr.ip_addr);
nts_addr.port = 0;
for (i = 0; i < 1000; i++) {
TST_SuspendLogging();
key_id = INACTIVE_AUTHKEY;
switch (i % 5) {
case 0:
inst = NAU_CreateNoneInstance();
TEST_CHECK(!NAU_IsAuthEnabled(inst));
TEST_CHECK(NAU_GetSuggestedNtpVersion(inst) == 4);
mode = NTP_AUTH_NONE;
can_auth_req = 1;
can_auth_res = 1;
break;
case 1:
key_id = random() % 7 + 2;
inst = NAU_CreateSymmetricInstance(key_id);
TEST_CHECK(NAU_IsAuthEnabled(inst));
TEST_CHECK(NAU_GetSuggestedNtpVersion(inst) ==
(KEY_KeyKnown(inst->key_id) && KEY_GetAuthLength(inst->key_id) > 20 ? 3 : 4));
mode = NTP_AUTH_SYMMETRIC;
can_auth_req = KEY_KeyKnown(key_id);
can_auth_res = can_auth_req;
break;
case 2:
inst = NAU_CreateNtsInstance(&nts_addr, "test", &nts_addr);
TEST_CHECK(NAU_IsAuthEnabled(inst));
TEST_CHECK(NAU_GetSuggestedNtpVersion(inst) == 4);
mode = NTP_AUTH_NTS;
can_auth_req = 0;
can_auth_res = 0;
break;
case 3:
key_id = 1 + random() % 100;
inst = NULL;
mode = NTP_AUTH_MSSNTP;
can_auth_req = 1;
can_auth_res = 0;
break;
case 4:
key_id = 1 + random() % 100;
inst = NULL;
mode = NTP_AUTH_MSSNTP_EXT;
can_auth_req = 0;
can_auth_res = 0;
break;
default:
assert(0);
}
TST_ResumeLogging();
DEBUG_LOG("iteration %d auth=%d key_id=%d", i, (int)mode, (int)key_id);
prepare_packet(mode, &req, &req_info, 1);
if (inst) {
TEST_CHECK(inst->mode == mode);
TEST_CHECK(inst->key_id == key_id);
NAU_DumpData(inst);
NAU_GetReport(inst, &report);
if (random() % 2)
NAU_ChangeAddress(inst, &nts_addr.ip_addr);
if (inst->mode == NTP_AUTH_NTS) {
TST_SuspendLogging();
for (j = random() % 5; j > 0; j--)
#ifdef FEAT_NTS
TEST_CHECK(!NAU_PrepareRequestAuth(inst));
#else
TEST_CHECK(NAU_PrepareRequestAuth(inst));
#endif
TEST_CHECK(!NAU_GenerateRequestAuth(inst, &req, &req_info));
TST_ResumeLogging();
} else if (can_auth_req) {
TEST_CHECK(NAU_PrepareRequestAuth(inst));
TEST_CHECK(NAU_GenerateRequestAuth(inst, &req, &req_info));
} else {
TEST_CHECK(NAU_PrepareRequestAuth(inst));
TEST_CHECK(!NAU_GenerateRequestAuth(inst, &req, &req_info));
}
}
if (!inst || !can_auth_req)
add_dummy_auth(mode, key_id, &req, &req_info);
TEST_CHECK(req_info.auth.mode == mode);
memset(&req_info.auth, 0, sizeof (req_info.auth));
TEST_CHECK(NAU_ParsePacket(&req, &req_info));
TEST_CHECK(req_info.auth.mode == mode);
TEST_CHECK(req_info.auth.mac.key_id == key_id);
kod = 1;
TEST_CHECK(NAU_CheckRequestAuth(&req, &req_info, &kod) == can_auth_req);
TEST_CHECK(kod == 0);
if (inst) {
for (j = NTP_AUTH_NONE; j <= NTP_AUTH_NTS; j++) {
if (j == mode && j == NTP_AUTH_NONE)
continue;
prepare_packet(j, &res, &res_info, 0);
add_dummy_auth(j, key_id ? key_id : 1, &res, &res_info);
TEST_CHECK(res_info.auth.mode == j);
TEST_CHECK(!NAU_CheckResponseAuth(inst, &res, &res_info));
}
}
prepare_packet(mode, &res, &res_info, 0);
TEST_CHECK(NAU_GenerateResponseAuth(&req, &req_info, &res, &res_info, NULL, NULL, kod) ==
can_auth_res);
if (!can_auth_res)
add_dummy_auth(mode, key_id, &res, &res_info);
memset(&res_info.auth, 0, sizeof (res_info.auth));
TEST_CHECK(NAU_ParsePacket(&res, &res_info));
TEST_CHECK(res_info.auth.mode == mode);
TEST_CHECK(res_info.auth.mac.key_id == key_id);
if (inst) {
if (mode == NTP_AUTH_SYMMETRIC) {
res_info.auth.mac.key_id ^= 1;
TEST_CHECK(!NAU_CheckResponseAuth(inst, &res, &res_info));
res_info.auth.mac.key_id ^= 1;
}
TEST_CHECK(NAU_CheckResponseAuth(inst, &res, &res_info) == can_auth_res);
NAU_GetReport(inst, &report);
NAU_DestroyInstance(inst);
}
}
NNS_Finalise();
NSD_Finalise();
KEY_Finalise();
LCL_Finalise();
CNF_Finalise();
HSH_Finalise();
}
#else
void
test_unit(void)
{
TEST_REQUIRE(0);
}
#endif
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