s23_srvr.c revision 331638
1/* ssl/s23_srvr.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58/* ==================================================================== 59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111 112#include <stdio.h> 113#include "ssl_locl.h" 114#include <openssl/buffer.h> 115#include <openssl/rand.h> 116#include <openssl/objects.h> 117#include <openssl/evp.h> 118#ifdef OPENSSL_FIPS 119# include <openssl/fips.h> 120#endif 121 122static const SSL_METHOD *ssl23_get_server_method(int ver); 123int ssl23_get_client_hello(SSL *s); 124static const SSL_METHOD *ssl23_get_server_method(int ver) 125{ 126#ifndef OPENSSL_NO_SSL2 127 if (ver == SSL2_VERSION) 128 return (SSLv2_server_method()); 129#endif 130#ifndef OPENSSL_NO_SSL3 131 if (ver == SSL3_VERSION) 132 return (SSLv3_server_method()); 133#endif 134 if (ver == TLS1_VERSION) 135 return (TLSv1_server_method()); 136 else if (ver == TLS1_1_VERSION) 137 return (TLSv1_1_server_method()); 138 else if (ver == TLS1_2_VERSION) 139 return (TLSv1_2_server_method()); 140 else 141 return (NULL); 142} 143 144IMPLEMENT_ssl23_meth_func(SSLv23_server_method, 145 ssl23_accept, 146 ssl_undefined_function, ssl23_get_server_method) 147 148int ssl23_accept(SSL *s) 149{ 150 BUF_MEM *buf; 151 unsigned long Time = (unsigned long)time(NULL); 152 void (*cb) (const SSL *ssl, int type, int val) = NULL; 153 int ret = -1; 154 int new_state, state; 155 156 RAND_add(&Time, sizeof(Time), 0); 157 ERR_clear_error(); 158 clear_sys_error(); 159 160 if (s->info_callback != NULL) 161 cb = s->info_callback; 162 else if (s->ctx->info_callback != NULL) 163 cb = s->ctx->info_callback; 164 165 s->in_handshake++; 166 if (!SSL_in_init(s) || SSL_in_before(s)) 167 SSL_clear(s); 168 169 for (;;) { 170 state = s->state; 171 172 switch (s->state) { 173 case SSL_ST_BEFORE: 174 case SSL_ST_ACCEPT: 175 case SSL_ST_BEFORE | SSL_ST_ACCEPT: 176 case SSL_ST_OK | SSL_ST_ACCEPT: 177 178 s->server = 1; 179 if (cb != NULL) 180 cb(s, SSL_CB_HANDSHAKE_START, 1); 181 182 /* s->version=SSL3_VERSION; */ 183 s->type = SSL_ST_ACCEPT; 184 185 if (s->init_buf == NULL) { 186 if ((buf = BUF_MEM_new()) == NULL) { 187 ret = -1; 188 goto end; 189 } 190 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) { 191 BUF_MEM_free(buf); 192 ret = -1; 193 goto end; 194 } 195 s->init_buf = buf; 196 } 197 198 if (!ssl3_init_finished_mac(s)) { 199 ret = -1; 200 goto end; 201 } 202 203 s->state = SSL23_ST_SR_CLNT_HELLO_A; 204 s->ctx->stats.sess_accept++; 205 s->init_num = 0; 206 break; 207 208 case SSL23_ST_SR_CLNT_HELLO_A: 209 case SSL23_ST_SR_CLNT_HELLO_B: 210 211 s->shutdown = 0; 212 ret = ssl23_get_client_hello(s); 213 if (ret >= 0) 214 cb = NULL; 215 goto end; 216 /* break; */ 217 218 default: 219 SSLerr(SSL_F_SSL23_ACCEPT, SSL_R_UNKNOWN_STATE); 220 ret = -1; 221 goto end; 222 /* break; */ 223 } 224 225 if ((cb != NULL) && (s->state != state)) { 226 new_state = s->state; 227 s->state = state; 228 cb(s, SSL_CB_ACCEPT_LOOP, 1); 229 s->state = new_state; 230 } 231 } 232 end: 233 s->in_handshake--; 234 if (cb != NULL) 235 cb(s, SSL_CB_ACCEPT_EXIT, ret); 236 return (ret); 237} 238 239int ssl23_get_client_hello(SSL *s) 240{ 241 /*- 242 * Request this many bytes in initial read. 243 * We can detect SSL 3.0/TLS 1.0 Client Hellos 244 * ('type == 3') correctly only when the following 245 * is in a single record, which is not guaranteed by 246 * the protocol specification: 247 * Byte Content 248 * 0 type \ 249 * 1/2 version > record header 250 * 3/4 length / 251 * 5 msg_type \ 252 * 6-8 length > Client Hello message 253 * 9/10 client_version / 254 */ 255 char buf_space[11]; 256 char *buf = &(buf_space[0]); 257 unsigned char *p, *d, *d_len, *dd; 258 unsigned int i; 259 unsigned int csl, sil, cl; 260 int n = 0, j; 261 int type = 0; 262 int v[2]; 263 264 if (s->state == SSL23_ST_SR_CLNT_HELLO_A) { 265 /* read the initial header */ 266 v[0] = v[1] = 0; 267 268 if (!ssl3_setup_buffers(s)) 269 goto err; 270 271 n = ssl23_read_bytes(s, sizeof(buf_space)); 272 if (n != sizeof(buf_space)) 273 return (n); /* n == -1 || n == 0 */ 274 275 p = s->packet; 276 277 memcpy(buf, p, n); 278 279 if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO)) { 280 /* 281 * SSLv2 header 282 */ 283 if ((p[3] == 0x00) && (p[4] == 0x02)) { 284 v[0] = p[3]; 285 v[1] = p[4]; 286 /* SSLv2 */ 287 if (!(s->options & SSL_OP_NO_SSLv2)) 288 type = 1; 289 } else if (p[3] == SSL3_VERSION_MAJOR) { 290 v[0] = p[3]; 291 v[1] = p[4]; 292 /* SSLv3/TLSv1 */ 293 if (p[4] >= TLS1_VERSION_MINOR) { 294 if (p[4] >= TLS1_2_VERSION_MINOR && 295 !(s->options & SSL_OP_NO_TLSv1_2)) { 296 s->version = TLS1_2_VERSION; 297 s->state = SSL23_ST_SR_CLNT_HELLO_B; 298 } else if (p[4] >= TLS1_1_VERSION_MINOR && 299 !(s->options & SSL_OP_NO_TLSv1_1)) { 300 s->version = TLS1_1_VERSION; 301 /* 302 * type=2; 303 *//* 304 * done later to survive restarts 305 */ 306 s->state = SSL23_ST_SR_CLNT_HELLO_B; 307 } else if (!(s->options & SSL_OP_NO_TLSv1)) { 308 s->version = TLS1_VERSION; 309 /* 310 * type=2; 311 *//* 312 * done later to survive restarts 313 */ 314 s->state = SSL23_ST_SR_CLNT_HELLO_B; 315 } else if (!(s->options & SSL_OP_NO_SSLv3)) { 316 s->version = SSL3_VERSION; 317 /* type=2; */ 318 s->state = SSL23_ST_SR_CLNT_HELLO_B; 319 } else if (!(s->options & SSL_OP_NO_SSLv2)) { 320 type = 1; 321 } 322 } else if (!(s->options & SSL_OP_NO_SSLv3)) { 323 s->version = SSL3_VERSION; 324 /* type=2; */ 325 s->state = SSL23_ST_SR_CLNT_HELLO_B; 326 } else if (!(s->options & SSL_OP_NO_SSLv2)) 327 type = 1; 328 329 } 330 } 331 /* p[4] < 5 ... silly record length? */ 332 else if ((p[0] == SSL3_RT_HANDSHAKE) && 333 (p[1] == SSL3_VERSION_MAJOR) && 334 (p[5] == SSL3_MT_CLIENT_HELLO) && ((p[3] == 0 && p[4] < 5) 335 || (p[9] >= p[1]))) { 336 /* 337 * SSLv3 or tls1 header 338 */ 339 340 v[0] = p[1]; /* major version (= SSL3_VERSION_MAJOR) */ 341 /* 342 * We must look at client_version inside the Client Hello message 343 * to get the correct minor version. However if we have only a 344 * pathologically small fragment of the Client Hello message, this 345 * would be difficult, and we'd have to read more records to find 346 * out. No known SSL 3.0 client fragments ClientHello like this, 347 * so we simply reject such connections to avoid protocol version 348 * downgrade attacks. 349 */ 350 if (p[3] == 0 && p[4] < 6) { 351 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_RECORD_TOO_SMALL); 352 goto err; 353 } 354 /* 355 * if major version number > 3 set minor to a value which will 356 * use the highest version 3 we support. If TLS 2.0 ever appears 357 * we will need to revise this.... 358 */ 359 if (p[9] > SSL3_VERSION_MAJOR) 360 v[1] = 0xff; 361 else 362 v[1] = p[10]; /* minor version according to client_version */ 363 if (v[1] >= TLS1_VERSION_MINOR) { 364 if (v[1] >= TLS1_2_VERSION_MINOR && 365 !(s->options & SSL_OP_NO_TLSv1_2)) { 366 s->version = TLS1_2_VERSION; 367 type = 3; 368 } else if (v[1] >= TLS1_1_VERSION_MINOR && 369 !(s->options & SSL_OP_NO_TLSv1_1)) { 370 s->version = TLS1_1_VERSION; 371 type = 3; 372 } else if (!(s->options & SSL_OP_NO_TLSv1)) { 373 s->version = TLS1_VERSION; 374 type = 3; 375 } else if (!(s->options & SSL_OP_NO_SSLv3)) { 376 s->version = SSL3_VERSION; 377 type = 3; 378 } 379 } else { 380 /* client requests SSL 3.0 */ 381 if (!(s->options & SSL_OP_NO_SSLv3)) { 382 s->version = SSL3_VERSION; 383 type = 3; 384 } else if (!(s->options & SSL_OP_NO_TLSv1)) { 385 /* 386 * we won't be able to use TLS of course, but this will 387 * send an appropriate alert 388 */ 389 s->version = TLS1_VERSION; 390 type = 3; 391 } 392 } 393 } else if ((strncmp("GET ", (char *)p, 4) == 0) || 394 (strncmp("POST ", (char *)p, 5) == 0) || 395 (strncmp("HEAD ", (char *)p, 5) == 0) || 396 (strncmp("PUT ", (char *)p, 4) == 0)) { 397 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_HTTP_REQUEST); 398 goto err; 399 } else if (strncmp("CONNECT", (char *)p, 7) == 0) { 400 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_HTTPS_PROXY_REQUEST); 401 goto err; 402 } 403 } 404 405 /* ensure that TLS_MAX_VERSION is up-to-date */ 406 OPENSSL_assert(s->version <= TLS_MAX_VERSION); 407 408 if (s->version < TLS1_2_VERSION && tls1_suiteb(s)) { 409 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, 410 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); 411 goto err; 412 } 413#ifdef OPENSSL_FIPS 414 if (FIPS_mode() && (s->version < TLS1_VERSION)) { 415 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, 416 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); 417 goto err; 418 } 419#endif 420 421 if (s->state == SSL23_ST_SR_CLNT_HELLO_B) { 422 /* 423 * we have SSLv3/TLSv1 in an SSLv2 header (other cases skip this 424 * state) 425 */ 426 427 type = 2; 428 p = s->packet; 429 v[0] = p[3]; /* == SSL3_VERSION_MAJOR */ 430 v[1] = p[4]; 431 432 /*- 433 * An SSLv3/TLSv1 backwards-compatible CLIENT-HELLO in an SSLv2 434 * header is sent directly on the wire, not wrapped as a TLS 435 * record. It's format is: 436 * Byte Content 437 * 0-1 msg_length 438 * 2 msg_type 439 * 3-4 version 440 * 5-6 cipher_spec_length 441 * 7-8 session_id_length 442 * 9-10 challenge_length 443 * ... ... 444 */ 445 n = ((p[0] & 0x7f) << 8) | p[1]; 446 if (n > (1024 * 4)) { 447 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_RECORD_TOO_LARGE); 448 goto err; 449 } 450 if (n < 9) { 451 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, 452 SSL_R_RECORD_LENGTH_MISMATCH); 453 goto err; 454 } 455 456 j = ssl23_read_bytes(s, n + 2); 457 /* 458 * We previously read 11 bytes, so if j > 0, we must have j == n+2 == 459 * s->packet_length. We have at least 11 valid packet bytes. 460 */ 461 if (j <= 0) 462 return (j); 463 464 ssl3_finish_mac(s, s->packet + 2, s->packet_length - 2); 465 466 /* CLIENT-HELLO */ 467 if (s->msg_callback) 468 s->msg_callback(0, SSL2_VERSION, 0, s->packet + 2, 469 s->packet_length - 2, s, s->msg_callback_arg); 470 471 p = s->packet; 472 p += 5; 473 n2s(p, csl); 474 n2s(p, sil); 475 n2s(p, cl); 476 d = (unsigned char *)s->init_buf->data; 477 if ((csl + sil + cl + 11) != s->packet_length) { /* We can't have TLS 478 * extensions in SSL 479 * 2.0 format * 480 * Client Hello, can 481 * we? Error 482 * condition should 483 * be * '>' 484 * otherweise */ 485 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, 486 SSL_R_RECORD_LENGTH_MISMATCH); 487 goto err; 488 } 489 490 /* record header: msg_type ... */ 491 *(d++) = SSL3_MT_CLIENT_HELLO; 492 /* ... and length (actual value will be written later) */ 493 d_len = d; 494 d += 3; 495 496 /* client_version */ 497 *(d++) = SSL3_VERSION_MAJOR; /* == v[0] */ 498 *(d++) = v[1]; 499 500 /* lets populate the random area */ 501 /* get the challenge_length */ 502 i = (cl > SSL3_RANDOM_SIZE) ? SSL3_RANDOM_SIZE : cl; 503 memset(d, 0, SSL3_RANDOM_SIZE); 504 memcpy(&(d[SSL3_RANDOM_SIZE - i]), &(p[csl + sil]), i); 505 d += SSL3_RANDOM_SIZE; 506 507 /* no session-id reuse */ 508 *(d++) = 0; 509 510 /* ciphers */ 511 j = 0; 512 dd = d; 513 d += 2; 514 for (i = 0; i < csl; i += 3) { 515 if (p[i] != 0) 516 continue; 517 *(d++) = p[i + 1]; 518 *(d++) = p[i + 2]; 519 j += 2; 520 } 521 s2n(j, dd); 522 523 /* COMPRESSION */ 524 *(d++) = 1; 525 *(d++) = 0; 526 527#if 0 528 /* copy any remaining data with may be extensions */ 529 p = p + csl + sil + cl; 530 while (p < s->packet + s->packet_length) { 531 *(d++) = *(p++); 532 } 533#endif 534 535 i = (d - (unsigned char *)s->init_buf->data) - 4; 536 l2n3((long)i, d_len); 537 538 /* get the data reused from the init_buf */ 539 s->s3->tmp.reuse_message = 1; 540 s->s3->tmp.message_type = SSL3_MT_CLIENT_HELLO; 541 s->s3->tmp.message_size = i; 542 } 543 544 /* imaginary new state (for program structure): */ 545 /* s->state = SSL23_SR_CLNT_HELLO_C */ 546 547 if (type == 1) { 548#ifdef OPENSSL_NO_SSL2 549 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); 550 goto err; 551#else 552 /* we are talking sslv2 */ 553 /* 554 * we need to clean up the SSLv3/TLSv1 setup and put in the sslv2 555 * stuff. 556 */ 557 558 if (s->s2 == NULL) { 559 if (!ssl2_new(s)) 560 goto err; 561 } else 562 ssl2_clear(s); 563 564 if (s->s3 != NULL) 565 ssl3_free(s); 566 567 if (!BUF_MEM_grow_clean(s->init_buf, 568 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { 569 goto err; 570 } 571 572 s->state = SSL2_ST_GET_CLIENT_HELLO_A; 573 if (s->options & SSL_OP_NO_TLSv1 && s->options & SSL_OP_NO_SSLv3) 574 s->s2->ssl2_rollback = 0; 575 else 576 /* 577 * reject SSL 2.0 session if client supports SSL 3.0 or TLS 1.0 578 * (SSL 3.0 draft/RFC 2246, App. E.2) 579 */ 580 s->s2->ssl2_rollback = 1; 581 582 /* 583 * setup the n bytes we have read so we get them from the sslv2 584 * buffer 585 */ 586 s->rstate = SSL_ST_READ_HEADER; 587 s->packet_length = n; 588 s->packet = &(s->s2->rbuf[0]); 589 memcpy(s->packet, buf, n); 590 s->s2->rbuf_left = n; 591 s->s2->rbuf_offs = 0; 592 593 s->method = SSLv2_server_method(); 594 s->handshake_func = s->method->ssl_accept; 595#endif 596 } 597 598 if ((type == 2) || (type == 3)) { 599 /* 600 * we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) 601 */ 602 const SSL_METHOD *new_method; 603 new_method = ssl23_get_server_method(s->version); 604 if (new_method == NULL) { 605 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); 606 goto err; 607 } 608 s->method = new_method; 609 610 if (!ssl_init_wbio_buffer(s, 1)) 611 goto err; 612 613 /* we are in this state */ 614 s->state = SSL3_ST_SR_CLNT_HELLO_A; 615 616 if (type == 3) { 617 /* 618 * put the 'n' bytes we have read into the input buffer for SSLv3 619 */ 620 s->rstate = SSL_ST_READ_HEADER; 621 s->packet_length = n; 622 if (s->s3->rbuf.buf == NULL) 623 if (!ssl3_setup_read_buffer(s)) 624 goto err; 625 626 s->packet = &(s->s3->rbuf.buf[0]); 627 memcpy(s->packet, buf, n); 628 s->s3->rbuf.left = n; 629 s->s3->rbuf.offset = 0; 630 } else { 631 s->packet_length = 0; 632 s->s3->rbuf.left = 0; 633 s->s3->rbuf.offset = 0; 634 } 635#if 0 /* ssl3_get_client_hello does this */ 636 s->client_version = (v[0] << 8) | v[1]; 637#endif 638 s->handshake_func = s->method->ssl_accept; 639 } 640 641 if ((type < 1) || (type > 3)) { 642 /* bad, very bad */ 643 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL); 644 goto err; 645 } 646 s->init_num = 0; 647 648 if (buf != buf_space) 649 OPENSSL_free(buf); 650 return (SSL_accept(s)); 651 err: 652 if (buf != buf_space) 653 OPENSSL_free(buf); 654 return (-1); 655} 656