1 /* 2 * Copyright (c) 2009-2012 Niels Provos and Nick Mathewson 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 // Get rid of OSX 10.7 and greater deprecation warnings. 28 #if defined(__APPLE__) && defined(__clang__) 29 #pragma clang diagnostic ignored "-Wdeprecated-declarations" 30 #endif 31 32 #ifdef _WIN32 33 #include <winsock2.h> 34 #include <windows.h> 35 #endif 36 37 #ifndef _WIN32 38 #include <sys/types.h> 39 #include <sys/socket.h> 40 #include <netinet/in.h> 41 #endif 42 43 #include "event2/util.h" 44 #include "event2/event.h" 45 #include "event2/bufferevent_ssl.h" 46 #include "event2/buffer.h" 47 #include "event2/listener.h" 48 49 #include "regress.h" 50 #include "tinytest.h" 51 #include "tinytest_macros.h" 52 53 #include <openssl/ssl.h> 54 #include <openssl/bio.h> 55 #include <openssl/err.h> 56 #include <openssl/pem.h> 57 58 #include <string.h> 59 60 /* A short pre-generated key, to save the cost of doing an RSA key generation 61 * step during the unit tests. It's only 512 bits long, and it is published 62 * in this file, so you would have to be very foolish to consider using it in 63 * your own code. */ 64 static const char KEY[] = 65 "-----BEGIN RSA PRIVATE KEY-----\n" 66 "MIIBOgIBAAJBAKibTEzXjj+sqpipePX1lEk5BNFuL/dDBbw8QCXgaJWikOiKHeJq\n" 67 "3FQ0OmCnmpkdsPFE4x3ojYmmdgE2i0dJwq0CAwEAAQJAZ08gpUS+qE1IClps/2gG\n" 68 "AAer6Bc31K2AaiIQvCSQcH440cp062QtWMC3V5sEoWmdLsbAHFH26/9ZHn5zAflp\n" 69 "gQIhANWOx/UYeR8HD0WREU5kcuSzgzNLwUErHLzxP7U6aojpAiEAyh2H35CjN/P7\n" 70 "NhcZ4QYw3PeUWpqgJnaE/4i80BSYkSUCIQDLHFhLYLJZ80HwHTADif/ISn9/Ow6b\n" 71 "p6BWh3DbMar/eQIgBPS6azH5vpp983KXkNv9AL4VZi9ac/b+BeINdzC6GP0CIDmB\n" 72 "U6GFEQTZ3IfuiVabG5pummdC4DNbcdI+WKrSFNmQ\n" 73 "-----END RSA PRIVATE KEY-----\n"; 74 75 static EVP_PKEY * 76 getkey(void) 77 { 78 EVP_PKEY *key; 79 BIO *bio; 80 81 /* new read-only BIO backed by KEY. */ 82 bio = BIO_new_mem_buf((char*)KEY, -1); 83 tt_assert(bio); 84 85 key = PEM_read_bio_PrivateKey(bio,NULL,NULL,NULL); 86 BIO_free(bio); 87 tt_assert(key); 88 89 return key; 90 end: 91 return NULL; 92 } 93 94 static X509 * 95 getcert(void) 96 { 97 /* Dummy code to make a quick-and-dirty valid certificate with 98 OpenSSL. Don't copy this code into your own program! It does a 99 number of things in a stupid and insecure way. */ 100 X509 *x509 = NULL; 101 X509_NAME *name = NULL; 102 EVP_PKEY *key = getkey(); 103 int nid; 104 time_t now = time(NULL); 105 106 tt_assert(key); 107 108 x509 = X509_new(); 109 tt_assert(x509); 110 tt_assert(0 != X509_set_version(x509, 2)); 111 tt_assert(0 != ASN1_INTEGER_set(X509_get_serialNumber(x509), 112 (long)now)); 113 114 name = X509_NAME_new(); 115 tt_assert(name); 116 nid = OBJ_txt2nid("commonName"); 117 tt_assert(NID_undef != nid); 118 tt_assert(0 != X509_NAME_add_entry_by_NID( 119 name, nid, MBSTRING_ASC, (unsigned char*)"example.com", 120 -1, -1, 0)); 121 122 X509_set_subject_name(x509, name); 123 X509_set_issuer_name(x509, name); 124 125 X509_time_adj(X509_get_notBefore(x509), 0, &now); 126 now += 3600; 127 X509_time_adj(X509_get_notAfter(x509), 0, &now); 128 X509_set_pubkey(x509, key); 129 tt_assert(0 != X509_sign(x509, key, EVP_sha1())); 130 131 return x509; 132 end: 133 X509_free(x509); 134 return NULL; 135 } 136 137 static int disable_tls_11_and_12 = 0; 138 static SSL_CTX *the_ssl_ctx = NULL; 139 140 static SSL_CTX * 141 get_ssl_ctx(void) 142 { 143 if (the_ssl_ctx) 144 return the_ssl_ctx; 145 the_ssl_ctx = SSL_CTX_new(SSLv23_method()); 146 if (!the_ssl_ctx) 147 return NULL; 148 if (disable_tls_11_and_12) { 149 #ifdef SSL_OP_NO_TLSv1_2 150 SSL_CTX_set_options(the_ssl_ctx, SSL_OP_NO_TLSv1_2); 151 #endif 152 #ifdef SSL_OP_NO_TLSv1_1 153 SSL_CTX_set_options(the_ssl_ctx, SSL_OP_NO_TLSv1_1); 154 #endif 155 } 156 return the_ssl_ctx; 157 } 158 159 static void 160 init_ssl(void) 161 { 162 SSL_library_init(); 163 ERR_load_crypto_strings(); 164 SSL_load_error_strings(); 165 OpenSSL_add_all_algorithms(); 166 if (SSLeay() != OPENSSL_VERSION_NUMBER) { 167 TT_DECLARE("WARN", ("Version mismatch for openssl: compiled with %lx but running with %lx", (unsigned long)OPENSSL_VERSION_NUMBER, (unsigned long) SSLeay())); 168 } 169 } 170 171 /* ==================== 172 Here's a simple test: we read a number from the input, increment it, and 173 reply, until we get to 1001. 174 */ 175 176 static int test_is_done = 0; 177 static int n_connected = 0; 178 static int got_close = 0; 179 static int got_error = 0; 180 static int renegotiate_at = -1; 181 static int stop_when_connected = 0; 182 static int pending_connect_events = 0; 183 static struct event_base *exit_base = NULL; 184 185 static void 186 respond_to_number(struct bufferevent *bev, void *ctx) 187 { 188 struct evbuffer *b = bufferevent_get_input(bev); 189 char *line; 190 int n; 191 line = evbuffer_readln(b, NULL, EVBUFFER_EOL_LF); 192 if (! line) 193 return; 194 n = atoi(line); 195 if (n <= 0) 196 TT_FAIL(("Bad number: %s", line)); 197 TT_BLATHER(("The number was %d", n)); 198 if (n == 1001) { 199 ++test_is_done; 200 bufferevent_free(bev); /* Should trigger close on other side. */ 201 return; 202 } 203 if (!strcmp(ctx, "client") && n == renegotiate_at) { 204 SSL_renegotiate(bufferevent_openssl_get_ssl(bev)); 205 } 206 ++n; 207 evbuffer_add_printf(bufferevent_get_output(bev), 208 "%d\n", n); 209 TT_BLATHER(("Done reading; now writing.")); 210 bufferevent_enable(bev, EV_WRITE); 211 bufferevent_disable(bev, EV_READ); 212 } 213 214 static void 215 done_writing_cb(struct bufferevent *bev, void *ctx) 216 { 217 struct evbuffer *b = bufferevent_get_output(bev); 218 if (evbuffer_get_length(b)) 219 return; 220 TT_BLATHER(("Done writing.")); 221 bufferevent_disable(bev, EV_WRITE); 222 bufferevent_enable(bev, EV_READ); 223 } 224 225 static void 226 eventcb(struct bufferevent *bev, short what, void *ctx) 227 { 228 TT_BLATHER(("Got event %d", (int)what)); 229 if (what & BEV_EVENT_CONNECTED) { 230 SSL *ssl; 231 X509 *peer_cert; 232 ++n_connected; 233 ssl = bufferevent_openssl_get_ssl(bev); 234 tt_assert(ssl); 235 peer_cert = SSL_get_peer_certificate(ssl); 236 if (0==strcmp(ctx, "server")) { 237 tt_assert(peer_cert == NULL); 238 } else { 239 tt_assert(peer_cert != NULL); 240 } 241 if (stop_when_connected) { 242 if (--pending_connect_events == 0) 243 event_base_loopexit(exit_base, NULL); 244 } 245 } else if (what & BEV_EVENT_EOF) { 246 TT_BLATHER(("Got a good EOF")); 247 ++got_close; 248 bufferevent_free(bev); 249 } else if (what & BEV_EVENT_ERROR) { 250 TT_BLATHER(("Got an error.")); 251 ++got_error; 252 bufferevent_free(bev); 253 } 254 end: 255 ; 256 } 257 258 static void 259 open_ssl_bufevs(struct bufferevent **bev1_out, struct bufferevent **bev2_out, 260 struct event_base *base, int is_open, int flags, SSL *ssl1, SSL *ssl2, 261 evutil_socket_t *fd_pair, struct bufferevent **underlying_pair) 262 { 263 int state1 = is_open ? BUFFEREVENT_SSL_OPEN :BUFFEREVENT_SSL_CONNECTING; 264 int state2 = is_open ? BUFFEREVENT_SSL_OPEN :BUFFEREVENT_SSL_ACCEPTING; 265 if (fd_pair) { 266 *bev1_out = bufferevent_openssl_socket_new( 267 base, fd_pair[0], ssl1, state1, flags); 268 *bev2_out = bufferevent_openssl_socket_new( 269 base, fd_pair[1], ssl2, state2, flags); 270 } else { 271 *bev1_out = bufferevent_openssl_filter_new( 272 base, underlying_pair[0], ssl1, state1, flags); 273 *bev2_out = bufferevent_openssl_filter_new( 274 base, underlying_pair[1], ssl2, state2, flags); 275 276 } 277 bufferevent_setcb(*bev1_out, respond_to_number, done_writing_cb, 278 eventcb, (void*)"client"); 279 bufferevent_setcb(*bev2_out, respond_to_number, done_writing_cb, 280 eventcb, (void*)"server"); 281 } 282 283 static void 284 regress_bufferevent_openssl(void *arg) 285 { 286 struct basic_test_data *data = arg; 287 288 struct bufferevent *bev1, *bev2; 289 SSL *ssl1, *ssl2; 290 X509 *cert = getcert(); 291 EVP_PKEY *key = getkey(); 292 const int start_open = strstr((char*)data->setup_data, "open")!=NULL; 293 const int filter = strstr((char*)data->setup_data, "filter")!=NULL; 294 int flags = BEV_OPT_DEFER_CALLBACKS; 295 struct bufferevent *bev_ll[2] = { NULL, NULL }; 296 evutil_socket_t *fd_pair = NULL; 297 298 tt_assert(cert); 299 tt_assert(key); 300 301 init_ssl(); 302 303 if (strstr((char*)data->setup_data, "renegotiate")) { 304 if (SSLeay() >= 0x10001000 && 305 SSLeay() < 0x1000104f) { 306 /* 1.0.1 up to 1.0.1c has a bug where TLS1.1 and 1.2 307 * can't renegotiate with themselves. Disable. */ 308 disable_tls_11_and_12 = 1; 309 } 310 renegotiate_at = 600; 311 } 312 313 ssl1 = SSL_new(get_ssl_ctx()); 314 ssl2 = SSL_new(get_ssl_ctx()); 315 316 SSL_use_certificate(ssl2, cert); 317 SSL_use_PrivateKey(ssl2, key); 318 319 if (! start_open) 320 flags |= BEV_OPT_CLOSE_ON_FREE; 321 322 if (!filter) { 323 tt_assert(strstr((char*)data->setup_data, "socketpair")); 324 fd_pair = data->pair; 325 } else { 326 bev_ll[0] = bufferevent_socket_new(data->base, data->pair[0], 327 BEV_OPT_CLOSE_ON_FREE); 328 bev_ll[1] = bufferevent_socket_new(data->base, data->pair[1], 329 BEV_OPT_CLOSE_ON_FREE); 330 } 331 332 open_ssl_bufevs(&bev1, &bev2, data->base, 0, flags, ssl1, ssl2, 333 fd_pair, bev_ll); 334 335 if (!filter) { 336 tt_int_op(bufferevent_getfd(bev1), ==, data->pair[0]); 337 } else { 338 tt_ptr_op(bufferevent_get_underlying(bev1), ==, bev_ll[0]); 339 } 340 341 if (start_open) { 342 pending_connect_events = 2; 343 stop_when_connected = 1; 344 exit_base = data->base; 345 event_base_dispatch(data->base); 346 /* Okay, now the renegotiation is done. Make new 347 * bufferevents to test opening in BUFFEREVENT_SSL_OPEN */ 348 flags |= BEV_OPT_CLOSE_ON_FREE; 349 bufferevent_free(bev1); 350 bufferevent_free(bev2); 351 bev1 = bev2 = NULL; 352 open_ssl_bufevs(&bev1, &bev2, data->base, 1, flags, ssl1, ssl2, 353 fd_pair, bev_ll); 354 } 355 356 bufferevent_enable(bev1, EV_READ|EV_WRITE); 357 bufferevent_enable(bev2, EV_READ|EV_WRITE); 358 359 evbuffer_add_printf(bufferevent_get_output(bev1), "1\n"); 360 361 event_base_dispatch(data->base); 362 363 tt_assert(test_is_done == 1); 364 tt_assert(n_connected == 2); 365 366 /* We don't handle shutdown properly yet. 367 tt_int_op(got_close, ==, 1); 368 tt_int_op(got_error, ==, 0); 369 */ 370 end: 371 return; 372 } 373 374 static void 375 acceptcb(struct evconnlistener *listener, evutil_socket_t fd, 376 struct sockaddr *addr, int socklen, void *arg) 377 { 378 struct basic_test_data *data = arg; 379 struct bufferevent *bev; 380 SSL *ssl = SSL_new(get_ssl_ctx()); 381 382 SSL_use_certificate(ssl, getcert()); 383 SSL_use_PrivateKey(ssl, getkey()); 384 385 bev = bufferevent_openssl_socket_new( 386 data->base, 387 fd, 388 ssl, 389 BUFFEREVENT_SSL_ACCEPTING, 390 BEV_OPT_CLOSE_ON_FREE|BEV_OPT_DEFER_CALLBACKS); 391 392 bufferevent_setcb(bev, respond_to_number, NULL, eventcb, 393 (void*)"server"); 394 395 bufferevent_enable(bev, EV_READ|EV_WRITE); 396 397 /* Only accept once, then disable ourself. */ 398 evconnlistener_disable(listener); 399 } 400 401 static void 402 regress_bufferevent_openssl_connect(void *arg) 403 { 404 struct basic_test_data *data = arg; 405 406 struct event_base *base = data->base; 407 408 struct evconnlistener *listener; 409 struct bufferevent *bev; 410 struct sockaddr_in sin; 411 struct sockaddr_storage ss; 412 ev_socklen_t slen; 413 414 init_ssl(); 415 416 memset(&sin, 0, sizeof(sin)); 417 sin.sin_family = AF_INET; 418 sin.sin_addr.s_addr = htonl(0x7f000001); 419 420 memset(&ss, 0, sizeof(ss)); 421 slen = sizeof(ss); 422 423 listener = evconnlistener_new_bind(base, acceptcb, data, 424 LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE, 425 -1, (struct sockaddr *)&sin, sizeof(sin)); 426 427 tt_assert(listener); 428 tt_assert(evconnlistener_get_fd(listener) >= 0); 429 430 bev = bufferevent_openssl_socket_new( 431 data->base, -1, SSL_new(get_ssl_ctx()), 432 BUFFEREVENT_SSL_CONNECTING, 433 BEV_OPT_CLOSE_ON_FREE|BEV_OPT_DEFER_CALLBACKS); 434 tt_assert(bev); 435 436 bufferevent_setcb(bev, respond_to_number, NULL, eventcb, 437 (void*)"client"); 438 439 tt_assert(getsockname(evconnlistener_get_fd(listener), 440 (struct sockaddr*)&ss, &slen) == 0); 441 tt_assert(slen == sizeof(struct sockaddr_in)); 442 tt_int_op(((struct sockaddr*)&ss)->sa_family, ==, AF_INET); 443 tt_int_op(((struct sockaddr*)&ss)->sa_family, ==, AF_INET); 444 445 tt_assert(0 == 446 bufferevent_socket_connect(bev, (struct sockaddr*)&ss, slen)); 447 evbuffer_add_printf(bufferevent_get_output(bev), "1\n"); 448 bufferevent_enable(bev, EV_READ|EV_WRITE); 449 450 event_base_dispatch(base); 451 end: 452 ; 453 } 454 455 struct testcase_t ssl_testcases[] = { 456 457 { "bufferevent_socketpair", regress_bufferevent_openssl, TT_ISOLATED, 458 &basic_setup, (void*)"socketpair" }, 459 { "bufferevent_filter", regress_bufferevent_openssl, 460 TT_ISOLATED, 461 &basic_setup, (void*)"filter" }, 462 { "bufferevent_renegotiate_socketpair", regress_bufferevent_openssl, 463 TT_ISOLATED, 464 &basic_setup, (void*)"socketpair renegotiate" }, 465 { "bufferevent_renegotiate_filter", regress_bufferevent_openssl, 466 TT_ISOLATED, 467 &basic_setup, (void*)"filter renegotiate" }, 468 { "bufferevent_socketpair_startopen", regress_bufferevent_openssl, 469 TT_ISOLATED, &basic_setup, (void*)"socketpair open" }, 470 { "bufferevent_filter_startopen", regress_bufferevent_openssl, 471 TT_ISOLATED, &basic_setup, (void*)"filter open" }, 472 473 { "bufferevent_connect", regress_bufferevent_openssl_connect, 474 TT_FORK|TT_NEED_BASE, &basic_setup, NULL }, 475 476 END_OF_TESTCASES, 477 }; 478