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unit-tests: Add unit tests for basic CHILD_SA rekeying

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Tobias Brunner
2016-06-17 18:48:02 +02:00
parent 14588d99a4
commit fa098aa97c
3 changed files with 237 additions and 0 deletions
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src/libcharon/tests/Makefile.am
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@@ -25,6 +25,7 @@ libcharon_tests_LDADD = \
exchange_tests_SOURCES = \
suites/test_child_delete.c \
suites/test_child_rekey.c \
utils/exchange_test_asserts.h utils/exchange_test_asserts.c \
utils/exchange_test_helper.h utils/exchange_test_helper.c \
utils/mock_dh.h utils/mock_dh.c \
src/libcharon/tests/exchange_tests.h
+1
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@@ -14,3 +14,4 @@
*/
TEST_SUITE(child_delete_suite_create)
TEST_SUITE(child_rekey_suite_create)
src/libcharon/tests/suites/test_child_rekey.c
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@@ -0,0 +1,235 @@
/*
* Copyright (C) 2016 Tobias Brunner
* HSR Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#include "test_suite.h"
#include <daemon.h>
#include <tests/utils/exchange_test_helper.h>
#include <tests/utils/exchange_test_asserts.h>
#include <tests/utils/sa_asserts.h>
/**
* Initiate rekeying the CHILD_SA with the given SPI on the given IKE_SA.
*/
#define initiate_rekey(sa, spi) ({ \
assert_hook_not_called(child_updown); \
assert_hook_not_called(child_rekey); \
call_ikesa(sa, rekey_child_sa, PROTO_ESP, spi); \
assert_child_sa_state(sa, spi, CHILD_REKEYING); \
assert_hook(); \
assert_hook(); \
})
/**
* Regular CHILD_SA rekey either initiated by the original initiator or
* responder of the IKE_SA.
*/
START_TEST(test_regular)
{
ike_sa_t *a, *b;
uint32_t spi_a = _i+1, spi_b = 2-_i;
if (_i)
{ /* responder rekeys the CHILD_SA (SPI 2) */
exchange_test_helper->establish_sa(exchange_test_helper,
&b, &a);
}
else
{ /* initiator rekeys the CHILD_SA (SPI 1) */
exchange_test_helper->establish_sa(exchange_test_helper,
&a, &b);
}
initiate_rekey(a, spi_a);
/* this should never get called as this results in a successful rekeying */
assert_hook_not_called(child_updown);
/* CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, [KEi,] TSi, TSr } --> */
assert_hook_called(child_rekey);
assert_notify(IN, REKEY_SA);
exchange_test_helper->process_message(exchange_test_helper, b, NULL);
/* FIXME: keeping this in CHILD_REKEYING is not ideal */
assert_child_sa_state(b, spi_b, CHILD_REKEYING);
assert_child_sa_state(b, 4, CHILD_INSTALLED);
assert_hook();
/* <-- CREATE_CHILD_SA { SA, Nr, [KEr,] TSi, TSr } */
assert_hook_called(child_rekey);
assert_no_notify(IN, REKEY_SA);
exchange_test_helper->process_message(exchange_test_helper, a, NULL);
assert_child_sa_state(a, spi_a, CHILD_DELETING);
assert_child_sa_state(a, 3, CHILD_INSTALLED);
assert_hook();
/* INFORMATIONAL { D } --> */
assert_hook_not_called(child_rekey);
assert_single_payload(IN, PLV2_DELETE);
exchange_test_helper->process_message(exchange_test_helper, b, NULL);
assert_child_sa_state(b, 4, CHILD_INSTALLED);
assert_child_sa_count(b, 1);
assert_hook();
/* <-- INFORMATIONAL { D } */
assert_hook_not_called(child_rekey);
assert_single_payload(IN, PLV2_DELETE);
exchange_test_helper->process_message(exchange_test_helper, a, NULL);
assert_child_sa_state(a, 3, CHILD_INSTALLED);
assert_child_sa_count(a, 1);
assert_hook();
/* child_updown */
assert_hook();
call_ikesa(a, destroy);
call_ikesa(b, destroy);
}
END_TEST
/**
* Both peers initiate the CHILD_SA reekying concurrently and should handle
* the collision properly depending on the nonces.
*/
START_TEST(test_collision)
{
ike_sa_t *a, *b;
exchange_test_helper->establish_sa(exchange_test_helper,
&a, &b);
/* When rekeyings collide we get two CHILD_SAs with a total of four nonces.
* The CHILD_SA with the lowest nonce SHOULD be deleted by the peer that
* created that CHILD_SA. The replaced CHILD_SA is deleted by the peer that
* initiated the surviving SA.
* Four nonces and SPIs are needed (SPI 1 and 2 are used for the initial
* CHILD_SA):
* N1/3 -----\ /----- N2/4
* \--/-----> N3/5
* N4/6 <-------/ /----- ...
* ... -----\
* We test this four times, each time a different nonce is the lowest.
*/
struct {
/* Nonces used at each point */
u_char nonces[4];
/* SPIs of the deleted CHILD_SA (either redundant or replaced) */
uint32_t spi_del_a, spi_del_b;
/* SPIs of the kept CHILD_SA */
uint32_t spi_a, spi_b;
} data[] = {
{ { 0x00, 0xFF, 0xFF, 0xFF }, 3, 2, 6, 4 },
{ { 0xFF, 0x00, 0xFF, 0xFF }, 1, 4, 3, 5 },
{ { 0xFF, 0xFF, 0x00, 0xFF }, 3, 2, 6, 4 },
{ { 0xFF, 0xFF, 0xFF, 0x00 }, 1, 4, 3, 5 },
};
exchange_test_helper->nonce_first_byte = data[_i].nonces[0];
initiate_rekey(a, 1);
exchange_test_helper->nonce_first_byte = data[_i].nonces[1];
initiate_rekey(b, 2);
/* this should never get called as this results in a successful rekeying */
assert_hook_not_called(child_updown);
/* CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, [KEi,] TSi, TSr } --> */
exchange_test_helper->nonce_first_byte = data[_i].nonces[2];
assert_hook_rekey(child_rekey, 2, 5);
exchange_test_helper->process_message(exchange_test_helper, b, NULL);
assert_child_sa_state(b, 2, CHILD_REKEYING);
assert_child_sa_state(b, 5, CHILD_INSTALLED);
assert_hook();
/* <-- CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, [KEi,] TSi, TSr } */
exchange_test_helper->nonce_first_byte = data[_i].nonces[3];
assert_hook_rekey(child_rekey, 1, 6);
exchange_test_helper->process_message(exchange_test_helper, a, NULL);
assert_child_sa_state(a, 1, CHILD_REKEYING);
assert_child_sa_state(a, 6, CHILD_INSTALLED);
assert_hook();
/* <-- CREATE_CHILD_SA { SA, Nr, [KEr,] TSi, TSr } */
if (data[_i].spi_del_a == 1)
{ /* currently we call this again if we keep our own replacement as we
* already called it above */
assert_hook_rekey(child_rekey, 1, data[_i].spi_a);
exchange_test_helper->process_message(exchange_test_helper, a, NULL);
assert_hook();
}
else
{
exchange_test_helper->process_message(exchange_test_helper, a, NULL);
}
assert_child_sa_state(a, data[_i].spi_del_a, CHILD_DELETING);
assert_child_sa_state(a, data[_i].spi_del_b, CHILD_REKEYING);
assert_child_sa_state(a, data[_i].spi_a, CHILD_INSTALLED);
/* CREATE_CHILD_SA { SA, Nr, [KEr,] TSi, TSr } --> */
if (data[_i].spi_del_b == 2)
{
assert_hook_rekey(child_rekey, 2, data[_i].spi_b);
exchange_test_helper->process_message(exchange_test_helper, b, NULL);
assert_hook();
}
else
{
exchange_test_helper->process_message(exchange_test_helper, b, NULL);
}
assert_child_sa_state(b, data[_i].spi_del_b, CHILD_DELETING);
assert_child_sa_state(b, data[_i].spi_del_a, CHILD_REKEYING);
assert_child_sa_state(b, data[_i].spi_b, CHILD_INSTALLED);
/* we don't expect this hook to get called anymore */
assert_hook_not_called(child_rekey);
/* INFORMATIONAL { D } --> */
exchange_test_helper->process_message(exchange_test_helper, b, NULL);
assert_child_sa_state(b, data[_i].spi_del_b, CHILD_DELETING);
assert_child_sa_state(b, data[_i].spi_b, CHILD_INSTALLED);
assert_child_sa_count(b, 2);
/* <-- INFORMATIONAL { D } */
exchange_test_helper->process_message(exchange_test_helper, a, NULL);
assert_child_sa_state(a, data[_i].spi_del_a, CHILD_DELETING);
assert_child_sa_state(a, data[_i].spi_a, CHILD_INSTALLED);
assert_child_sa_count(a, 2);
/* <-- INFORMATIONAL { D } */
exchange_test_helper->process_message(exchange_test_helper, a, NULL);
assert_child_sa_state(a, data[_i].spi_a, CHILD_INSTALLED);
assert_child_sa_count(a, 1);
/* INFORMATIONAL { D } --> */
exchange_test_helper->process_message(exchange_test_helper, b, NULL);
assert_child_sa_state(b, data[_i].spi_b, CHILD_INSTALLED);
assert_child_sa_count(b, 1);
/* child_rekey/child_updown */
assert_hook();
assert_hook();
call_ikesa(a, destroy);
call_ikesa(b, destroy);
}
END_TEST
Suite *child_rekey_suite_create()
{
Suite *s;
TCase *tc;
s = suite_create("child rekey");
tc = tcase_create("regular");
tcase_add_loop_test(tc, test_regular, 0, 2);
suite_add_tcase(s, tc);
tc = tcase_create("collisions");
tcase_add_loop_test(tc, test_collision, 0, 4);
suite_add_tcase(s, tc);
return s;
}