1 /*
2 * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <string.h>
11
12 #include <openssl/opensslconf.h>
13 #include <openssl/bio.h>
14 #include <openssl/crypto.h>
15 #include <openssl/evp.h>
16 #include <openssl/ssl.h>
17 #include <openssl/err.h>
18 #include <time.h>
19
20 #include "internal/packet.h"
21
22 #include "testutil.h"
23
24 #define CLIENT_VERSION_LEN 2
25
26 #define TOTAL_NUM_TESTS 4
27
28 /*
29 * Test that explicitly setting ticket data results in it appearing in the
30 * ClientHello for a negotiated SSL/TLS version
31 */
32 #define TEST_SET_SESSION_TICK_DATA_VER_NEG 0
33 /* Enable padding and make sure ClientHello is long enough to require it */
34 #define TEST_ADD_PADDING 1
35 /* Enable padding and make sure ClientHello is short enough to not need it */
36 #define TEST_PADDING_NOT_NEEDED 2
37 /*
38 * Enable padding and add a PSK to the ClientHello (this will also ensure the
39 * ClientHello is long enough to need padding)
40 */
41 #define TEST_ADD_PADDING_AND_PSK 3
42
43 #define F5_WORKAROUND_MIN_MSG_LEN 0x7f
44 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
45
46 static const char *sessionfile = NULL;
47 /* Dummy ALPN protocols used to pad out the size of the ClientHello */
48 /* ASCII 'O' = 79 = 0x4F = EBCDIC '|'*/
49 #ifdef CHARSET_EBCDIC
50 static const char alpn_prots[] =
51 "|1234567890123456789012345678901234567890123456789012345678901234567890123456789"
52 "|1234567890123456789012345678901234567890123456789012345678901234567890123456789";
53 #else
54 static const char alpn_prots[] =
55 "O1234567890123456789012345678901234567890123456789012345678901234567890123456789"
56 "O1234567890123456789012345678901234567890123456789012345678901234567890123456789";
57 #endif
58
test_client_hello(int currtest)59 static int test_client_hello(int currtest)
60 {
61 SSL_CTX *ctx;
62 SSL *con = NULL;
63 BIO *rbio;
64 BIO *wbio;
65 long len;
66 unsigned char *data;
67 PACKET pkt, pkt2, pkt3;
68 char *dummytick = "Hello World!";
69 unsigned int type = 0;
70 int testresult = 0;
71 size_t msglen;
72 BIO *sessbio = NULL;
73 SSL_SESSION *sess = NULL;
74
75 #ifdef OPENSSL_NO_TLS1_3
76 if (currtest == TEST_ADD_PADDING_AND_PSK)
77 return 1;
78 #endif
79
80 memset(&pkt, 0, sizeof(pkt));
81 memset(&pkt2, 0, sizeof(pkt2));
82 memset(&pkt3, 0, sizeof(pkt3));
83
84 /*
85 * For each test set up an SSL_CTX and SSL and see what ClientHello gets
86 * produced when we try to connect
87 */
88 ctx = SSL_CTX_new(TLS_method());
89 if (!TEST_ptr(ctx))
90 goto end;
91 if (!TEST_true(SSL_CTX_set_max_proto_version(ctx, 0)))
92 goto end;
93
94 switch (currtest) {
95 case TEST_SET_SESSION_TICK_DATA_VER_NEG:
96 #if !defined(OPENSSL_NO_TLS1_3) && defined(OPENSSL_NO_TLS1_2)
97 /* TLSv1.3 is enabled and TLSv1.2 is disabled so can't do this test */
98 SSL_CTX_free(ctx);
99 return 1;
100 #else
101 /* Testing for session tickets <= TLS1.2; not relevant for 1.3 */
102 if (!TEST_true(SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION)))
103 goto end;
104 #endif
105 break;
106
107 case TEST_ADD_PADDING_AND_PSK:
108 /*
109 * In this case we're doing TLSv1.3 and we're sending a PSK so the
110 * ClientHello is already going to be quite long. To avoid getting one
111 * that is too long for this test we use a restricted ciphersuite list
112 */
113 if (!TEST_false(SSL_CTX_set_cipher_list(ctx, "")))
114 goto end;
115 ERR_clear_error();
116 /* Fall through */
117 case TEST_ADD_PADDING:
118 case TEST_PADDING_NOT_NEEDED:
119 SSL_CTX_set_options(ctx, SSL_OP_TLSEXT_PADDING);
120 /* Make sure we get a consistent size across TLS versions */
121 SSL_CTX_clear_options(ctx, SSL_OP_ENABLE_MIDDLEBOX_COMPAT);
122 /*
123 * Add some dummy ALPN protocols so that the ClientHello is at least
124 * F5_WORKAROUND_MIN_MSG_LEN bytes long - meaning padding will be
125 * needed.
126 */
127 if (currtest == TEST_ADD_PADDING) {
128 if (!TEST_false(SSL_CTX_set_alpn_protos(ctx,
129 (unsigned char *)alpn_prots,
130 sizeof(alpn_prots) - 1)))
131 goto end;
132 /*
133 * Otherwise we need to make sure we have a small enough message to
134 * not need padding.
135 */
136 } else if (!TEST_true(SSL_CTX_set_cipher_list(ctx,
137 "AES128-SHA"))
138 || !TEST_true(SSL_CTX_set_ciphersuites(ctx,
139 "TLS_AES_128_GCM_SHA256"))) {
140 goto end;
141 }
142 break;
143
144 default:
145 goto end;
146 }
147
148 con = SSL_new(ctx);
149 if (!TEST_ptr(con))
150 goto end;
151
152 if (currtest == TEST_ADD_PADDING_AND_PSK) {
153 sessbio = BIO_new_file(sessionfile, "r");
154 if (!TEST_ptr(sessbio)) {
155 TEST_info("Unable to open session.pem");
156 goto end;
157 }
158 sess = PEM_read_bio_SSL_SESSION(sessbio, NULL, NULL, NULL);
159 if (!TEST_ptr(sess)) {
160 TEST_info("Unable to load SSL_SESSION");
161 goto end;
162 }
163 /*
164 * We reset the creation time so that we don't discard the session as
165 * too old.
166 */
167 if (!TEST_true(SSL_SESSION_set_time(sess, (long)time(NULL)))
168 || !TEST_true(SSL_set_session(con, sess)))
169 goto end;
170 }
171
172 rbio = BIO_new(BIO_s_mem());
173 wbio = BIO_new(BIO_s_mem());
174 if (!TEST_ptr(rbio)|| !TEST_ptr(wbio)) {
175 BIO_free(rbio);
176 BIO_free(wbio);
177 goto end;
178 }
179
180 SSL_set_bio(con, rbio, wbio);
181 SSL_set_connect_state(con);
182
183 if (currtest == TEST_SET_SESSION_TICK_DATA_VER_NEG) {
184 if (!TEST_true(SSL_set_session_ticket_ext(con, dummytick,
185 strlen(dummytick))))
186 goto end;
187 }
188
189 if (!TEST_int_le(SSL_connect(con), 0)) {
190 /* This shouldn't succeed because we don't have a server! */
191 goto end;
192 }
193
194 if (!TEST_long_ge(len = BIO_get_mem_data(wbio, (char **)&data), 0)
195 || !TEST_true(PACKET_buf_init(&pkt, data, len))
196 /* Skip the record header */
197 || !PACKET_forward(&pkt, SSL3_RT_HEADER_LENGTH))
198 goto end;
199
200 msglen = PACKET_remaining(&pkt);
201
202 /* Skip the handshake message header */
203 if (!TEST_true(PACKET_forward(&pkt, SSL3_HM_HEADER_LENGTH))
204 /* Skip client version and random */
205 || !TEST_true(PACKET_forward(&pkt, CLIENT_VERSION_LEN
206 + SSL3_RANDOM_SIZE))
207 /* Skip session id */
208 || !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
209 /* Skip ciphers */
210 || !TEST_true(PACKET_get_length_prefixed_2(&pkt, &pkt2))
211 /* Skip compression */
212 || !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
213 /* Extensions len */
214 || !TEST_true(PACKET_as_length_prefixed_2(&pkt, &pkt2)))
215 goto end;
216
217 /* Loop through all extensions */
218 while (PACKET_remaining(&pkt2)) {
219
220 if (!TEST_true(PACKET_get_net_2(&pkt2, &type))
221 || !TEST_true(PACKET_get_length_prefixed_2(&pkt2, &pkt3)))
222 goto end;
223
224 if (type == TLSEXT_TYPE_session_ticket) {
225 if (currtest == TEST_SET_SESSION_TICK_DATA_VER_NEG) {
226 if (TEST_true(PACKET_equal(&pkt3, dummytick,
227 strlen(dummytick)))) {
228 /* Ticket data is as we expected */
229 testresult = 1;
230 }
231 goto end;
232 }
233 }
234 if (type == TLSEXT_TYPE_padding) {
235 if (!TEST_false(currtest == TEST_PADDING_NOT_NEEDED))
236 goto end;
237 else if (TEST_true(currtest == TEST_ADD_PADDING
238 || currtest == TEST_ADD_PADDING_AND_PSK))
239 testresult = TEST_true(msglen == F5_WORKAROUND_MAX_MSG_LEN);
240 }
241 }
242
243 if (currtest == TEST_PADDING_NOT_NEEDED)
244 testresult = 1;
245
246 end:
247 SSL_free(con);
248 SSL_CTX_free(ctx);
249 SSL_SESSION_free(sess);
250 BIO_free(sessbio);
251
252 return testresult;
253 }
254
255 OPT_TEST_DECLARE_USAGE("sessionfile\n")
256
setup_tests(void)257 int setup_tests(void)
258 {
259 if (!test_skip_common_options()) {
260 TEST_error("Error parsing test options\n");
261 return 0;
262 }
263
264 if (!TEST_ptr(sessionfile = test_get_argument(0)))
265 return 0;
266
267 ADD_ALL_TESTS(test_client_hello, TOTAL_NUM_TESTS);
268 return 1;
269 }
270
