1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
|
/*
* Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include <openssl/bio.h>
#include <openssl/crypto.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include "helpers/ssltestlib.h"
#include "testutil.h"
static char *cert = NULL;
static char *privkey = NULL;
static unsigned int timer_cb_count;
#define NUM_TESTS 2
#define DUMMY_CERT_STATUS_LEN 12
static unsigned char certstatus[] = {
SSL3_RT_HANDSHAKE, /* Content type */
0xfe, 0xfd, /* Record version */
0, 1, /* Epoch */
0, 0, 0, 0, 0, 0x0f, /* Record sequence number */
0, DTLS1_HM_HEADER_LENGTH + DUMMY_CERT_STATUS_LEN - 2,
SSL3_MT_CERTIFICATE_STATUS, /* Cert Status handshake message type */
0, 0, DUMMY_CERT_STATUS_LEN, /* Message len */
0, 5, /* Message sequence */
0, 0, 0, /* Fragment offset */
0, 0, DUMMY_CERT_STATUS_LEN - 2, /* Fragment len */
0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80 /* Dummy data */
};
#define RECORD_SEQUENCE 10
static unsigned int timer_cb(SSL *s, unsigned int timer_us)
{
++timer_cb_count;
if (timer_us == 0)
return 50000;
else
return 2 * timer_us;
}
static int test_dtls_unprocessed(int testidx)
{
SSL_CTX *sctx = NULL, *cctx = NULL;
SSL *serverssl1 = NULL, *clientssl1 = NULL;
BIO *c_to_s_fbio, *c_to_s_mempacket;
int testresult = 0;
timer_cb_count = 0;
if (!TEST_true(create_ssl_ctx_pair(NULL, DTLS_server_method(),
DTLS_client_method(),
DTLS1_VERSION, 0,
&sctx, &cctx, cert, privkey)))
return 0;
if (!TEST_true(SSL_CTX_set_cipher_list(cctx, "AES128-SHA")))
goto end;
c_to_s_fbio = BIO_new(bio_f_tls_dump_filter());
if (!TEST_ptr(c_to_s_fbio))
goto end;
/* BIO is freed by create_ssl_connection on error */
if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl1, &clientssl1,
NULL, c_to_s_fbio)))
goto end;
DTLS_set_timer_cb(clientssl1, timer_cb);
if (testidx == 1)
certstatus[RECORD_SEQUENCE] = 0xff;
/*
* Inject a dummy record from the next epoch. In test 0, this should never
* get used because the message sequence number is too big. In test 1 we set
* the record sequence number to be way off in the future.
*/
c_to_s_mempacket = SSL_get_wbio(clientssl1);
c_to_s_mempacket = BIO_next(c_to_s_mempacket);
mempacket_test_inject(c_to_s_mempacket, (char *)certstatus,
sizeof(certstatus), 1, INJECT_PACKET_IGNORE_REC_SEQ);
/*
* Create the connection. We use "create_bare_ssl_connection" here so that
* we can force the connection to not do "SSL_read" once partly connected.
* We don't want to accidentally read the dummy records we injected because
* they will fail to decrypt.
*/
if (!TEST_true(create_bare_ssl_connection(serverssl1, clientssl1,
SSL_ERROR_NONE, 0)))
goto end;
if (timer_cb_count == 0) {
printf("timer_callback was not called.\n");
goto end;
}
testresult = 1;
end:
SSL_free(serverssl1);
SSL_free(clientssl1);
SSL_CTX_free(sctx);
SSL_CTX_free(cctx);
return testresult;
}
#define CLI_TO_SRV_EPOCH_0_RECS 3
#define CLI_TO_SRV_EPOCH_1_RECS 1
#if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
# define SRV_TO_CLI_EPOCH_0_RECS 10
#else
/*
* In this case we have no ServerKeyExchange message, because we don't have
* ECDHE or DHE. When it is present it gets fragmented into 3 records in this
* test.
*/
# define SRV_TO_CLI_EPOCH_0_RECS 9
#endif
#define SRV_TO_CLI_EPOCH_1_RECS 1
#define TOTAL_FULL_HAND_RECORDS \
(CLI_TO_SRV_EPOCH_0_RECS + CLI_TO_SRV_EPOCH_1_RECS + \
SRV_TO_CLI_EPOCH_0_RECS + SRV_TO_CLI_EPOCH_1_RECS)
#define CLI_TO_SRV_RESUME_EPOCH_0_RECS 3
#define CLI_TO_SRV_RESUME_EPOCH_1_RECS 1
#define SRV_TO_CLI_RESUME_EPOCH_0_RECS 2
#define SRV_TO_CLI_RESUME_EPOCH_1_RECS 1
#define TOTAL_RESUME_HAND_RECORDS \
(CLI_TO_SRV_RESUME_EPOCH_0_RECS + CLI_TO_SRV_RESUME_EPOCH_1_RECS + \
SRV_TO_CLI_RESUME_EPOCH_0_RECS + SRV_TO_CLI_RESUME_EPOCH_1_RECS)
#define TOTAL_RECORDS (TOTAL_FULL_HAND_RECORDS + TOTAL_RESUME_HAND_RECORDS)
/*
* We are assuming a ServerKeyExchange message is sent in this test. If we don't
* have either DH or EC, then it won't be
*/
#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC)
static int test_dtls_drop_records(int idx)
{
SSL_CTX *sctx = NULL, *cctx = NULL;
SSL *serverssl = NULL, *clientssl = NULL;
BIO *c_to_s_fbio, *mempackbio;
int testresult = 0;
int epoch = 0;
SSL_SESSION *sess = NULL;
int cli_to_srv_epoch0, cli_to_srv_epoch1, srv_to_cli_epoch0;
if (!TEST_true(create_ssl_ctx_pair(NULL, DTLS_server_method(),
DTLS_client_method(),
DTLS1_VERSION, 0,
&sctx, &cctx, cert, privkey)))
return 0;
if (!TEST_true(SSL_CTX_set_dh_auto(sctx, 1)))
goto end;
if (idx >= TOTAL_FULL_HAND_RECORDS) {
/* We're going to do a resumption handshake. Get a session first. */
if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
NULL, NULL))
|| !TEST_true(create_ssl_connection(serverssl, clientssl,
SSL_ERROR_NONE))
|| !TEST_ptr(sess = SSL_get1_session(clientssl)))
goto end;
SSL_shutdown(clientssl);
SSL_shutdown(serverssl);
SSL_free(serverssl);
SSL_free(clientssl);
serverssl = clientssl = NULL;
cli_to_srv_epoch0 = CLI_TO_SRV_RESUME_EPOCH_0_RECS;
cli_to_srv_epoch1 = CLI_TO_SRV_RESUME_EPOCH_1_RECS;
srv_to_cli_epoch0 = SRV_TO_CLI_RESUME_EPOCH_0_RECS;
idx -= TOTAL_FULL_HAND_RECORDS;
} else {
cli_to_srv_epoch0 = CLI_TO_SRV_EPOCH_0_RECS;
cli_to_srv_epoch1 = CLI_TO_SRV_EPOCH_1_RECS;
srv_to_cli_epoch0 = SRV_TO_CLI_EPOCH_0_RECS;
}
c_to_s_fbio = BIO_new(bio_f_tls_dump_filter());
if (!TEST_ptr(c_to_s_fbio))
goto end;
/* BIO is freed by create_ssl_connection on error */
if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
NULL, c_to_s_fbio)))
goto end;
if (sess != NULL) {
if (!TEST_true(SSL_set_session(clientssl, sess)))
goto end;
}
DTLS_set_timer_cb(clientssl, timer_cb);
DTLS_set_timer_cb(serverssl, timer_cb);
/* Work out which record to drop based on the test number */
if (idx >= cli_to_srv_epoch0 + cli_to_srv_epoch1) {
mempackbio = SSL_get_wbio(serverssl);
idx -= cli_to_srv_epoch0 + cli_to_srv_epoch1;
if (idx >= srv_to_cli_epoch0) {
epoch = 1;
idx -= srv_to_cli_epoch0;
}
} else {
mempackbio = SSL_get_wbio(clientssl);
if (idx >= cli_to_srv_epoch0) {
epoch = 1;
idx -= cli_to_srv_epoch0;
}
mempackbio = BIO_next(mempackbio);
}
BIO_ctrl(mempackbio, MEMPACKET_CTRL_SET_DROP_EPOCH, epoch, NULL);
BIO_ctrl(mempackbio, MEMPACKET_CTRL_SET_DROP_REC, idx, NULL);
if (!TEST_true(create_ssl_connection(serverssl, clientssl, SSL_ERROR_NONE)))
goto end;
if (sess != NULL && !TEST_true(SSL_session_reused(clientssl)))
goto end;
/* If the test did what we planned then it should have dropped a record */
if (!TEST_int_eq((int)BIO_ctrl(mempackbio, MEMPACKET_CTRL_GET_DROP_REC, 0,
NULL), -1))
goto end;
testresult = 1;
end:
SSL_SESSION_free(sess);
SSL_free(serverssl);
SSL_free(clientssl);
SSL_CTX_free(sctx);
SSL_CTX_free(cctx);
return testresult;
}
#endif /* !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC) */
static const char dummy_cookie[] = "0123456";
static int generate_cookie_cb(SSL *ssl, unsigned char *cookie,
unsigned int *cookie_len)
{
memcpy(cookie, dummy_cookie, sizeof(dummy_cookie));
*cookie_len = sizeof(dummy_cookie);
return 1;
}
static int verify_cookie_cb(SSL *ssl, const unsigned char *cookie,
unsigned int cookie_len)
{
return TEST_mem_eq(cookie, cookie_len, dummy_cookie, sizeof(dummy_cookie));
}
static int test_cookie(void)
{
SSL_CTX *sctx = NULL, *cctx = NULL;
SSL *serverssl = NULL, *clientssl = NULL;
int testresult = 0;
if (!TEST_true(create_ssl_ctx_pair(NULL, DTLS_server_method(),
DTLS_client_method(),
DTLS1_VERSION, 0,
&sctx, &cctx, cert, privkey)))
return 0;
SSL_CTX_set_options(sctx, SSL_OP_COOKIE_EXCHANGE);
SSL_CTX_set_cookie_generate_cb(sctx, generate_cookie_cb);
SSL_CTX_set_cookie_verify_cb(sctx, verify_cookie_cb);
if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
NULL, NULL))
|| !TEST_true(create_ssl_connection(serverssl, clientssl,
SSL_ERROR_NONE)))
goto end;
testresult = 1;
end:
SSL_free(serverssl);
SSL_free(clientssl);
SSL_CTX_free(sctx);
SSL_CTX_free(cctx);
return testresult;
}
static int test_dtls_duplicate_records(void)
{
SSL_CTX *sctx = NULL, *cctx = NULL;
SSL *serverssl = NULL, *clientssl = NULL;
int testresult = 0;
if (!TEST_true(create_ssl_ctx_pair(NULL, DTLS_server_method(),
DTLS_client_method(),
DTLS1_VERSION, 0,
&sctx, &cctx, cert, privkey)))
return 0;
if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
NULL, NULL)))
goto end;
DTLS_set_timer_cb(clientssl, timer_cb);
DTLS_set_timer_cb(serverssl, timer_cb);
BIO_ctrl(SSL_get_wbio(clientssl), MEMPACKET_CTRL_SET_DUPLICATE_REC, 1, NULL);
BIO_ctrl(SSL_get_wbio(serverssl), MEMPACKET_CTRL_SET_DUPLICATE_REC, 1, NULL);
if (!TEST_true(create_ssl_connection(serverssl, clientssl, SSL_ERROR_NONE)))
goto end;
testresult = 1;
end:
SSL_free(serverssl);
SSL_free(clientssl);
SSL_CTX_free(sctx);
SSL_CTX_free(cctx);
return testresult;
}
OPT_TEST_DECLARE_USAGE("certfile privkeyfile\n")
int setup_tests(void)
{
if (!test_skip_common_options()) {
TEST_error("Error parsing test options\n");
return 0;
}
if (!TEST_ptr(cert = test_get_argument(0))
|| !TEST_ptr(privkey = test_get_argument(1)))
return 0;
ADD_ALL_TESTS(test_dtls_unprocessed, NUM_TESTS);
#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC)
ADD_ALL_TESTS(test_dtls_drop_records, TOTAL_RECORDS);
#endif
ADD_TEST(test_cookie);
ADD_TEST(test_dtls_duplicate_records);
return 1;
}
void cleanup_tests(void)
{
bio_f_tls_dump_filter_free();
bio_s_mempacket_test_free();
}
|