packetProcessing.c revision 1.1.1.4 1 #include "config.h"
2 #include "sntptest.h"
3 #include "networking.h"
4 #include "ntp_stdlib.h"
5 #include "unity.h"
6
7
8 const char * Version = "stub unit test Version string";
9
10 // Hacks into the key database.
11 extern struct key* key_ptr;
12 extern int key_cnt;
13
14
15 void PrepareAuthenticationTest(int key_id,int key_len,const char* type,const void* key_seq);
16 void PrepareAuthenticationTestMD5(int key_id,int key_len,const void* key_seq);
17 void setUp(void);
18 void tearDown(void);
19 void test_TooShortLength(void);
20 void test_LengthNotMultipleOfFour(void);
21 void test_TooShortExtensionFieldLength(void);
22 void test_UnauthenticatedPacketReject(void);
23 void test_CryptoNAKPacketReject(void);
24 void test_AuthenticatedPacketInvalid(void);
25 void test_AuthenticatedPacketUnknownKey(void);
26 void test_ServerVersionTooOld(void);
27 void test_ServerVersionTooNew(void);
28 void test_NonWantedMode(void);
29 void test_KoDRate(void);
30 void test_KoDDeny(void);
31 void test_RejectUnsyncedServer(void);
32 void test_RejectWrongResponseServerMode(void);
33 void test_AcceptNoSentPacketBroadcastMode(void);
34 void test_CorrectUnauthenticatedPacket(void);
35 void test_CorrectAuthenticatedPacketMD5(void);
36 void test_CorrectAuthenticatedPacketSHA1(void);
37
38
39 static struct pkt testpkt;
40 static struct pkt testspkt;
41 static sockaddr_u testsock;
42 bool restoreKeyDb;
43
44
45 void
46 PrepareAuthenticationTest(int key_id,
47 int key_len,
48 const char* type,
49 const void* key_seq) {
50 char str[25];
51 snprintf(str, 25, "%d", key_id);
52 ActivateOption("-a", str);
53
54 key_cnt = 1;
55 key_ptr = emalloc(sizeof(struct key));
56 key_ptr->next = NULL;
57 key_ptr->key_id = key_id;
58 key_ptr->key_len = key_len;
59 memcpy(key_ptr->type, "MD5", 3);
60
61 TEST_ASSERT_TRUE(key_len < sizeof(key_ptr->key_seq));
62
63 memcpy(key_ptr->key_seq, key_seq, key_ptr->key_len);
64 restoreKeyDb = true;
65 }
66
67
68 void
69 PrepareAuthenticationTestMD5(int key_id,
70 int key_len,
71 const void* key_seq) {
72 PrepareAuthenticationTest(key_id, key_len, "MD5", key_seq);
73 }
74
75
76 void
77 setUp(void) {
78
79 sntptest();
80 restoreKeyDb = false;
81
82 /* Initialize the test packet and socket,
83 * so they contain at least some valid data. */
84 testpkt.li_vn_mode = PKT_LI_VN_MODE(LEAP_NOWARNING, NTP_VERSION,
85 MODE_SERVER);
86 testpkt.stratum = STRATUM_REFCLOCK;
87 memcpy(&testpkt.refid, "GPS\0", 4);
88
89 /* Set the origin timestamp of the received packet to the
90 * same value as the transmit timestamp of the sent packet. */
91 l_fp tmp;
92 tmp.l_ui = 1000UL;
93 tmp.l_uf = 0UL;
94
95 HTONL_FP(&tmp, &testpkt.org);
96 HTONL_FP(&tmp, &testspkt.xmt);
97 }
98
99
100 void
101 tearDown(void) {
102
103 if (restoreKeyDb) {
104 key_cnt = 0;
105 free(key_ptr);
106 key_ptr = NULL;
107 }
108
109 sntptest_destroy(); //only on the final test!! if counter == 0 etc...
110 }
111
112
113
114 void
115 test_TooShortLength(void) {
116 TEST_ASSERT_EQUAL(PACKET_UNUSEABLE,
117 process_pkt(&testpkt, &testsock, LEN_PKT_NOMAC - 1,
118 MODE_SERVER, &testspkt, "UnitTest"));
119 TEST_ASSERT_EQUAL(PACKET_UNUSEABLE,
120 process_pkt(&testpkt, &testsock, LEN_PKT_NOMAC - 1,
121 MODE_BROADCAST, &testspkt, "UnitTest"));
122 }
123
124
125 void
126 test_LengthNotMultipleOfFour(void) {
127 TEST_ASSERT_EQUAL(PACKET_UNUSEABLE,
128 process_pkt(&testpkt, &testsock, LEN_PKT_NOMAC + 6,
129 MODE_SERVER, &testspkt, "UnitTest"));
130 TEST_ASSERT_EQUAL(PACKET_UNUSEABLE,
131 process_pkt(&testpkt, &testsock, LEN_PKT_NOMAC + 3,
132 MODE_BROADCAST, &testspkt, "UnitTest"));
133 }
134
135
136 void
137 test_TooShortExtensionFieldLength(void) {
138 /* The lower 16-bits are the length of the extension field.
139 * This lengths must be multiples of 4 bytes, which gives
140 * a minimum of 4 byte extension field length. */
141 testpkt.exten[7] = htonl(3); // 3 bytes is too short.
142
143 /* We send in a pkt_len of header size + 4 byte extension
144 * header + 24 byte MAC, this prevents the length error to
145 * be caught at an earlier stage */
146 int pkt_len = LEN_PKT_NOMAC + 4 + 24;
147
148 TEST_ASSERT_EQUAL(PACKET_UNUSEABLE,
149 process_pkt(&testpkt, &testsock, pkt_len,
150 MODE_SERVER, &testspkt, "UnitTest"));
151 }
152
153
154 void
155 test_UnauthenticatedPacketReject(void) {
156 //sntptest();
157 // Activate authentication option
158 ActivateOption("-a", "123");
159 TEST_ASSERT_TRUE(ENABLED_OPT(AUTHENTICATION));
160
161 int pkt_len = LEN_PKT_NOMAC;
162
163 // We demand authentication, but no MAC header is present.
164 TEST_ASSERT_EQUAL(SERVER_AUTH_FAIL,
165 process_pkt(&testpkt, &testsock, pkt_len,
166 MODE_SERVER, &testspkt, "UnitTest"));
167 }
168
169
170 void
171 test_CryptoNAKPacketReject(void) {
172 // Activate authentication option
173 ActivateOption("-a", "123");
174 TEST_ASSERT_TRUE(ENABLED_OPT(AUTHENTICATION));
175
176 int pkt_len = LEN_PKT_NOMAC + 4; // + 4 byte MAC = Crypto-NAK
177
178 TEST_ASSERT_EQUAL(SERVER_AUTH_FAIL,
179 process_pkt(&testpkt, &testsock, pkt_len,
180 MODE_SERVER, &testspkt, "UnitTest"));
181 }
182
183
184 void
185 test_AuthenticatedPacketInvalid(void) {
186 // Activate authentication option
187 PrepareAuthenticationTestMD5(50, 9, "123456789");
188 TEST_ASSERT_TRUE(ENABLED_OPT(AUTHENTICATION));
189
190 // Prepare the packet.
191 int pkt_len = LEN_PKT_NOMAC;
192
193 testpkt.exten[0] = htonl(50);
194 int mac_len = make_mac((char*)&testpkt, pkt_len,
195 MAX_MD5_LEN, key_ptr,
196 (char*)&testpkt.exten[1]);
197
198 pkt_len += 4 + mac_len;
199
200 // Now, alter the MAC so it becomes invalid.
201 testpkt.exten[1] += 1;
202
203 TEST_ASSERT_EQUAL(SERVER_AUTH_FAIL,
204 process_pkt(&testpkt, &testsock, pkt_len,
205 MODE_SERVER, &testspkt, "UnitTest"));
206 }
207
208
209 void
210 test_AuthenticatedPacketUnknownKey(void) {
211 // Activate authentication option
212 PrepareAuthenticationTestMD5(30, 9, "123456789");
213 TEST_ASSERT_TRUE(ENABLED_OPT(AUTHENTICATION));
214
215 // Prepare the packet. Observe that the Key-ID expected is 30,
216 // but the packet has a key id of 50.
217 int pkt_len = LEN_PKT_NOMAC;
218
219 testpkt.exten[0] = htonl(50);
220 int mac_len = make_mac((char*)&testpkt, pkt_len,
221 MAX_MD5_LEN, key_ptr,
222 (char*)&testpkt.exten[1]);
223 pkt_len += 4 + mac_len;
224
225 TEST_ASSERT_EQUAL(SERVER_AUTH_FAIL,
226 process_pkt(&testpkt, &testsock, pkt_len,
227 MODE_SERVER, &testspkt, "UnitTest"));
228 }
229
230
231 void
232 test_ServerVersionTooOld(void) {
233 TEST_ASSERT_FALSE(ENABLED_OPT(AUTHENTICATION));
234
235 testpkt.li_vn_mode = PKT_LI_VN_MODE(LEAP_NOWARNING,
236 NTP_OLDVERSION - 1,
237 MODE_CLIENT);
238 TEST_ASSERT_TRUE(PKT_VERSION(testpkt.li_vn_mode) < NTP_OLDVERSION);
239
240 int pkt_len = LEN_PKT_NOMAC;
241
242 TEST_ASSERT_EQUAL(SERVER_UNUSEABLE,
243 process_pkt(&testpkt, &testsock, pkt_len,
244 MODE_SERVER, &testspkt, "UnitTest"));
245 }
246
247
248 void
249 test_ServerVersionTooNew(void) {
250 TEST_ASSERT_FALSE(ENABLED_OPT(AUTHENTICATION));
251
252 testpkt.li_vn_mode = PKT_LI_VN_MODE(LEAP_NOWARNING,
253 NTP_VERSION + 1,
254 MODE_CLIENT);
255 TEST_ASSERT_TRUE(PKT_VERSION(testpkt.li_vn_mode) > NTP_VERSION);
256
257 int pkt_len = LEN_PKT_NOMAC;
258
259 TEST_ASSERT_EQUAL(SERVER_UNUSEABLE,
260 process_pkt(&testpkt, &testsock, pkt_len,
261 MODE_SERVER, &testspkt, "UnitTest"));
262 }
263
264
265 void
266 test_NonWantedMode(void) {
267 TEST_ASSERT_FALSE(ENABLED_OPT(AUTHENTICATION));
268
269 testpkt.li_vn_mode = PKT_LI_VN_MODE(LEAP_NOWARNING,
270 NTP_VERSION,
271 MODE_CLIENT);
272
273 // The packet has a mode of MODE_CLIENT, but process_pkt expects MODE_SERVER
274
275 TEST_ASSERT_EQUAL(SERVER_UNUSEABLE,
276 process_pkt(&testpkt, &testsock, LEN_PKT_NOMAC,
277 MODE_SERVER, &testspkt, "UnitTest"));
278 }
279
280
281 /* Tests bug 1597 */
282 void
283 test_KoDRate(void) {
284 TEST_ASSERT_FALSE(ENABLED_OPT(AUTHENTICATION));
285
286 testpkt.stratum = STRATUM_PKT_UNSPEC;
287 memcpy(&testpkt.refid, "RATE", 4);
288
289 TEST_ASSERT_EQUAL(KOD_RATE,
290 process_pkt(&testpkt, &testsock, LEN_PKT_NOMAC,
291 MODE_SERVER, &testspkt, "UnitTest"));
292 }
293
294
295 void
296 test_KoDDeny(void) {
297 TEST_ASSERT_FALSE(ENABLED_OPT(AUTHENTICATION));
298
299 testpkt.stratum = STRATUM_PKT_UNSPEC;
300 memcpy(&testpkt.refid, "DENY", 4);
301
302 TEST_ASSERT_EQUAL(KOD_DEMOBILIZE,
303 process_pkt(&testpkt, &testsock, LEN_PKT_NOMAC,
304 MODE_SERVER, &testspkt, "UnitTest"));
305 }
306
307
308 void
309 test_RejectUnsyncedServer(void) {
310 TEST_ASSERT_FALSE(ENABLED_OPT(AUTHENTICATION));
311
312 testpkt.li_vn_mode = PKT_LI_VN_MODE(LEAP_NOTINSYNC,
313 NTP_VERSION,
314 MODE_SERVER);
315
316 TEST_ASSERT_EQUAL(SERVER_UNUSEABLE,
317 process_pkt(&testpkt, &testsock, LEN_PKT_NOMAC,
318 MODE_SERVER, &testspkt, "UnitTest"));
319 }
320
321
322 void
323 test_RejectWrongResponseServerMode(void) {
324 TEST_ASSERT_FALSE(ENABLED_OPT(AUTHENTICATION));
325
326 l_fp tmp;
327 tmp.l_ui = 1000UL;
328 tmp.l_uf = 0UL;
329 HTONL_FP(&tmp, &testpkt.org);
330
331 tmp.l_ui = 2000UL;
332 tmp.l_uf = 0UL;
333 HTONL_FP(&tmp, &testspkt.xmt);
334
335 TEST_ASSERT_EQUAL(PACKET_UNUSEABLE,
336 process_pkt(&testpkt, &testsock, LEN_PKT_NOMAC,
337 MODE_SERVER, &testspkt, "UnitTest"));
338 }
339
340
341 void
342 test_AcceptNoSentPacketBroadcastMode(void) {
343 TEST_ASSERT_FALSE(ENABLED_OPT(AUTHENTICATION));
344
345 testpkt.li_vn_mode = PKT_LI_VN_MODE(LEAP_NOWARNING,
346 NTP_VERSION,
347 MODE_BROADCAST);
348
349 TEST_ASSERT_EQUAL(LEN_PKT_NOMAC,
350 process_pkt(&testpkt, &testsock, LEN_PKT_NOMAC,
351 MODE_BROADCAST, NULL, "UnitTest"));
352 }
353
354
355 void
356 test_CorrectUnauthenticatedPacket(void) {
357 TEST_ASSERT_FALSE(ENABLED_OPT(AUTHENTICATION));
358
359 TEST_ASSERT_EQUAL(LEN_PKT_NOMAC,
360 process_pkt(&testpkt, &testsock, LEN_PKT_NOMAC,
361 MODE_SERVER, &testspkt, "UnitTest"));
362 }
363
364
365 void
366 test_CorrectAuthenticatedPacketMD5(void) {
367 PrepareAuthenticationTestMD5(10, 15, "123456789abcdef");
368 TEST_ASSERT_TRUE(ENABLED_OPT(AUTHENTICATION));
369
370 int pkt_len = LEN_PKT_NOMAC;
371
372 // Prepare the packet.
373 testpkt.exten[0] = htonl(10);
374 int mac_len = make_mac((char*)&testpkt, pkt_len,
375 MAX_MD5_LEN, key_ptr,
376 (char*)&testpkt.exten[1]);
377
378 pkt_len += 4 + mac_len;
379
380 TEST_ASSERT_EQUAL(pkt_len,
381 process_pkt(&testpkt, &testsock, pkt_len,
382 MODE_SERVER, &testspkt, "UnitTest"));
383
384 }
385
386
387 void
388 test_CorrectAuthenticatedPacketSHA1(void) {
389 PrepareAuthenticationTest(20, 15, "SHA1", "abcdefghijklmno");
390 TEST_ASSERT_TRUE(ENABLED_OPT(AUTHENTICATION));
391
392 int pkt_len = LEN_PKT_NOMAC;
393
394 // Prepare the packet.
395 testpkt.exten[0] = htonl(20);
396 int mac_len = make_mac((char*)&testpkt, pkt_len,
397 MAX_MAC_LEN, key_ptr,
398 (char*)&testpkt.exten[1]);
399
400 pkt_len += 4 + mac_len;
401
402 TEST_ASSERT_EQUAL(pkt_len,
403 process_pkt(&testpkt, &testsock, pkt_len,
404 MODE_SERVER, &testspkt, "UnitTest"));
405 }
406