1 /* 2 * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (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 "../ssl/packet_local.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 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 = {0}, pkt2 = {0}, pkt3 = {0}; 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 /* 81 * For each test set up an SSL_CTX and SSL and see what ClientHello gets 82 * produced when we try to connect 83 */ 84 ctx = SSL_CTX_new(TLS_method()); 85 if (!TEST_ptr(ctx)) 86 goto end; 87 if (!TEST_true(SSL_CTX_set_max_proto_version(ctx, TLS_MAX_VERSION))) 88 goto end; 89 90 switch(currtest) { 91 case TEST_SET_SESSION_TICK_DATA_VER_NEG: 92 #if !defined(OPENSSL_NO_TLS1_3) && defined(OPENSSL_NO_TLS1_2) 93 /* TLSv1.3 is enabled and TLSv1.2 is disabled so can't do this test */ 94 return 1; 95 #else 96 /* Testing for session tickets <= TLS1.2; not relevant for 1.3 */ 97 if (!TEST_true(SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION))) 98 goto end; 99 #endif 100 break; 101 102 case TEST_ADD_PADDING_AND_PSK: 103 /* 104 * In this case we're doing TLSv1.3 and we're sending a PSK so the 105 * ClientHello is already going to be quite long. To avoid getting one 106 * that is too long for this test we use a restricted ciphersuite list 107 */ 108 if (!TEST_false(SSL_CTX_set_cipher_list(ctx, ""))) 109 goto end; 110 ERR_clear_error(); 111 /* Fall through */ 112 case TEST_ADD_PADDING: 113 case TEST_PADDING_NOT_NEEDED: 114 SSL_CTX_set_options(ctx, SSL_OP_TLSEXT_PADDING); 115 /* Make sure we get a consistent size across TLS versions */ 116 SSL_CTX_clear_options(ctx, SSL_OP_ENABLE_MIDDLEBOX_COMPAT); 117 /* 118 * Add some dummy ALPN protocols so that the ClientHello is at least 119 * F5_WORKAROUND_MIN_MSG_LEN bytes long - meaning padding will be 120 * needed. 121 */ 122 if (currtest == TEST_ADD_PADDING) { 123 if (!TEST_false(SSL_CTX_set_alpn_protos(ctx, 124 (unsigned char *)alpn_prots, 125 sizeof(alpn_prots) - 1))) 126 goto end; 127 /* 128 * Otherwise we need to make sure we have a small enough message to 129 * not need padding. 130 */ 131 } else if (!TEST_true(SSL_CTX_set_cipher_list(ctx, 132 "AES128-SHA")) 133 || !TEST_true(SSL_CTX_set_ciphersuites(ctx, 134 "TLS_AES_128_GCM_SHA256"))) { 135 goto end; 136 } 137 break; 138 139 default: 140 goto end; 141 } 142 143 con = SSL_new(ctx); 144 if (!TEST_ptr(con)) 145 goto end; 146 147 if (currtest == TEST_ADD_PADDING_AND_PSK) { 148 sessbio = BIO_new_file(sessionfile, "r"); 149 if (!TEST_ptr(sessbio)) { 150 TEST_info("Unable to open session.pem"); 151 goto end; 152 } 153 sess = PEM_read_bio_SSL_SESSION(sessbio, NULL, NULL, NULL); 154 if (!TEST_ptr(sess)) { 155 TEST_info("Unable to load SSL_SESSION"); 156 goto end; 157 } 158 /* 159 * We reset the creation time so that we don't discard the session as 160 * too old. 161 */ 162 if (!TEST_true(SSL_SESSION_set_time(sess, (long)time(NULL))) 163 || !TEST_true(SSL_set_session(con, sess))) 164 goto end; 165 } 166 167 rbio = BIO_new(BIO_s_mem()); 168 wbio = BIO_new(BIO_s_mem()); 169 if (!TEST_ptr(rbio)|| !TEST_ptr(wbio)) { 170 BIO_free(rbio); 171 BIO_free(wbio); 172 goto end; 173 } 174 175 SSL_set_bio(con, rbio, wbio); 176 SSL_set_connect_state(con); 177 178 if (currtest == TEST_SET_SESSION_TICK_DATA_VER_NEG) { 179 if (!TEST_true(SSL_set_session_ticket_ext(con, dummytick, 180 strlen(dummytick)))) 181 goto end; 182 } 183 184 if (!TEST_int_le(SSL_connect(con), 0)) { 185 /* This shouldn't succeed because we don't have a server! */ 186 goto end; 187 } 188 189 len = BIO_get_mem_data(wbio, (char **)&data); 190 if (!TEST_true(PACKET_buf_init(&pkt, data, len)) 191 /* Skip the record header */ 192 || !PACKET_forward(&pkt, SSL3_RT_HEADER_LENGTH)) 193 goto end; 194 195 msglen = PACKET_remaining(&pkt); 196 197 /* Skip the handshake message header */ 198 if (!TEST_true(PACKET_forward(&pkt, SSL3_HM_HEADER_LENGTH)) 199 /* Skip client version and random */ 200 || !TEST_true(PACKET_forward(&pkt, CLIENT_VERSION_LEN 201 + SSL3_RANDOM_SIZE)) 202 /* Skip session id */ 203 || !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2)) 204 /* Skip ciphers */ 205 || !TEST_true(PACKET_get_length_prefixed_2(&pkt, &pkt2)) 206 /* Skip compression */ 207 || !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2)) 208 /* Extensions len */ 209 || !TEST_true(PACKET_as_length_prefixed_2(&pkt, &pkt2))) 210 goto end; 211 212 /* Loop through all extensions */ 213 while (PACKET_remaining(&pkt2)) { 214 215 if (!TEST_true(PACKET_get_net_2(&pkt2, &type)) 216 || !TEST_true(PACKET_get_length_prefixed_2(&pkt2, &pkt3))) 217 goto end; 218 219 if (type == TLSEXT_TYPE_session_ticket) { 220 if (currtest == TEST_SET_SESSION_TICK_DATA_VER_NEG) { 221 if (TEST_true(PACKET_equal(&pkt3, dummytick, 222 strlen(dummytick)))) { 223 /* Ticket data is as we expected */ 224 testresult = 1; 225 } 226 goto end; 227 } 228 } 229 if (type == TLSEXT_TYPE_padding) { 230 if (!TEST_false(currtest == TEST_PADDING_NOT_NEEDED)) 231 goto end; 232 else if (TEST_true(currtest == TEST_ADD_PADDING 233 || currtest == TEST_ADD_PADDING_AND_PSK)) 234 testresult = TEST_true(msglen == F5_WORKAROUND_MAX_MSG_LEN); 235 } 236 } 237 238 if (currtest == TEST_PADDING_NOT_NEEDED) 239 testresult = 1; 240 241 end: 242 SSL_free(con); 243 SSL_CTX_free(ctx); 244 SSL_SESSION_free(sess); 245 BIO_free(sessbio); 246 247 return testresult; 248 } 249 250 int setup_tests(void) 251 { 252 if (!TEST_ptr(sessionfile = test_get_argument(0))) 253 return 0; 254 255 ADD_ALL_TESTS(test_client_hello, TOTAL_NUM_TESTS); 256 return 1; 257 } 258
Indexes created Sat Feb 28 05:31:39 UTC 2026