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 ssl3_init_finished_mac(s); 199 200 s->state = SSL23_ST_SR_CLNT_HELLO_A; 201 s->ctx->stats.sess_accept++; 202 s->init_num = 0; 203 break; 204 205 case SSL23_ST_SR_CLNT_HELLO_A: 206 case SSL23_ST_SR_CLNT_HELLO_B: 207 208 s->shutdown = 0; 209 ret = ssl23_get_client_hello(s); 210 if (ret >= 0) 211 cb = NULL; 212 goto end; 213 /* break; */ 214 215 default: 216 SSLerr(SSL_F_SSL23_ACCEPT, SSL_R_UNKNOWN_STATE); 217 ret = -1; 218 goto end; 219 /* break; */ 220 } 221 222 if ((cb != NULL) && (s->state != state)) { 223 new_state = s->state; 224 s->state = state; 225 cb(s, SSL_CB_ACCEPT_LOOP, 1); 226 s->state = new_state; 227 } 228 } 229 end: 230 s->in_handshake--; 231 if (cb != NULL) 232 cb(s, SSL_CB_ACCEPT_EXIT, ret); 233 return (ret); 234} 235 236int ssl23_get_client_hello(SSL *s) 237{ 238 /*- 239 * Request this many bytes in initial read. 240 * We can detect SSL 3.0/TLS 1.0 Client Hellos 241 * ('type == 3') correctly only when the following 242 * is in a single record, which is not guaranteed by 243 * the protocol specification: 244 * Byte Content 245 * 0 type \ 246 * 1/2 version > record header 247 * 3/4 length / 248 * 5 msg_type \ 249 * 6-8 length > Client Hello message 250 * 9/10 client_version / 251 */ 252 char buf_space[11]; 253 char *buf = &(buf_space[0]); 254 unsigned char *p, *d, *d_len, *dd; 255 unsigned int i; 256 unsigned int csl, sil, cl; 257 int n = 0, j; 258 int type = 0; 259 int v[2]; 260 261 if (s->state == SSL23_ST_SR_CLNT_HELLO_A) { 262 /* read the initial header */ 263 v[0] = v[1] = 0; 264 265 if (!ssl3_setup_buffers(s)) 266 goto err; 267 268 n = ssl23_read_bytes(s, sizeof buf_space); 269 if (n != sizeof buf_space) 270 return (n); /* n == -1 || n == 0 */ 271 272 p = s->packet; 273 274 memcpy(buf, p, n); 275 276 if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO)) { 277 /* 278 * SSLv2 header 279 */ 280 if ((p[3] == 0x00) && (p[4] == 0x02)) { 281 v[0] = p[3]; 282 v[1] = p[4]; 283 /* SSLv2 */ 284 if (!(s->options & SSL_OP_NO_SSLv2)) 285 type = 1; 286 } else if (p[3] == SSL3_VERSION_MAJOR) { 287 v[0] = p[3]; 288 v[1] = p[4]; 289 /* SSLv3/TLSv1 */ 290 if (p[4] >= TLS1_VERSION_MINOR) { 291 if (p[4] >= TLS1_2_VERSION_MINOR && 292 !(s->options & SSL_OP_NO_TLSv1_2)) { 293 s->version = TLS1_2_VERSION; 294 s->state = SSL23_ST_SR_CLNT_HELLO_B; 295 } else if (p[4] >= TLS1_1_VERSION_MINOR && 296 !(s->options & SSL_OP_NO_TLSv1_1)) { 297 s->version = TLS1_1_VERSION; 298 /* 299 * type=2; 300 *//* 301 * done later to survive restarts 302 */ 303 s->state = SSL23_ST_SR_CLNT_HELLO_B; 304 } else if (!(s->options & SSL_OP_NO_TLSv1)) { 305 s->version = TLS1_VERSION; 306 /* 307 * type=2; 308 *//* 309 * done later to survive restarts 310 */ 311 s->state = SSL23_ST_SR_CLNT_HELLO_B; 312 } else if (!(s->options & SSL_OP_NO_SSLv3)) { 313 s->version = SSL3_VERSION; 314 /* type=2; */ 315 s->state = SSL23_ST_SR_CLNT_HELLO_B; 316 } else if (!(s->options & SSL_OP_NO_SSLv2)) { 317 type = 1; 318 } 319 } else if (!(s->options & SSL_OP_NO_SSLv3)) { 320 s->version = SSL3_VERSION; 321 /* type=2; */ 322 s->state = SSL23_ST_SR_CLNT_HELLO_B; 323 } else if (!(s->options & SSL_OP_NO_SSLv2)) 324 type = 1; 325 326 } 327 } 328 /* p[4] < 5 ... silly record length? */ 329 else if ((p[0] == SSL3_RT_HANDSHAKE) && 330 (p[1] == SSL3_VERSION_MAJOR) && 331 (p[5] == SSL3_MT_CLIENT_HELLO) && ((p[3] == 0 && p[4] < 5) 332 || (p[9] >= p[1]))) { 333 /* 334 * SSLv3 or tls1 header 335 */ 336 337 v[0] = p[1]; /* major version (= SSL3_VERSION_MAJOR) */ 338 /* 339 * We must look at client_version inside the Client Hello message 340 * to get the correct minor version. However if we have only a 341 * pathologically small fragment of the Client Hello message, this 342 * would be difficult, and we'd have to read more records to find 343 * out. No known SSL 3.0 client fragments ClientHello like this, 344 * so we simply reject such connections to avoid protocol version 345 * downgrade attacks. 346 */ 347 if (p[3] == 0 && p[4] < 6) { 348 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_RECORD_TOO_SMALL); 349 goto err; 350 } 351 /* 352 * if major version number > 3 set minor to a value which will 353 * use the highest version 3 we support. If TLS 2.0 ever appears 354 * we will need to revise this.... 355 */ 356 if (p[9] > SSL3_VERSION_MAJOR) 357 v[1] = 0xff; 358 else 359 v[1] = p[10]; /* minor version according to client_version */ 360 if (v[1] >= TLS1_VERSION_MINOR) { 361 if (v[1] >= TLS1_2_VERSION_MINOR && 362 !(s->options & SSL_OP_NO_TLSv1_2)) { 363 s->version = TLS1_2_VERSION; 364 type = 3; 365 } else if (v[1] >= TLS1_1_VERSION_MINOR && 366 !(s->options & SSL_OP_NO_TLSv1_1)) { 367 s->version = TLS1_1_VERSION; 368 type = 3; 369 } else if (!(s->options & SSL_OP_NO_TLSv1)) { 370 s->version = TLS1_VERSION; 371 type = 3; 372 } else if (!(s->options & SSL_OP_NO_SSLv3)) { 373 s->version = SSL3_VERSION; 374 type = 3; 375 } 376 } else { 377 /* client requests SSL 3.0 */ 378 if (!(s->options & SSL_OP_NO_SSLv3)) { 379 s->version = SSL3_VERSION; 380 type = 3; 381 } else if (!(s->options & SSL_OP_NO_TLSv1)) { 382 /* 383 * we won't be able to use TLS of course, but this will 384 * send an appropriate alert 385 */ 386 s->version = TLS1_VERSION; 387 type = 3; 388 } 389 } 390 } else if ((strncmp("GET ", (char *)p, 4) == 0) || 391 (strncmp("POST ", (char *)p, 5) == 0) || 392 (strncmp("HEAD ", (char *)p, 5) == 0) || 393 (strncmp("PUT ", (char *)p, 4) == 0)) { 394 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_HTTP_REQUEST); 395 goto err; 396 } else if (strncmp("CONNECT", (char *)p, 7) == 0) { 397 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_HTTPS_PROXY_REQUEST); 398 goto err; 399 } 400 } 401 402 /* ensure that TLS_MAX_VERSION is up-to-date */ 403 OPENSSL_assert(s->version <= TLS_MAX_VERSION); 404 405 if (s->version < TLS1_2_VERSION && tls1_suiteb(s)) { 406 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, 407 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); 408 goto err; 409 } 410#ifdef OPENSSL_FIPS 411 if (FIPS_mode() && (s->version < TLS1_VERSION)) { 412 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, 413 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); 414 goto err; 415 } 416#endif 417 418 if (s->state == SSL23_ST_SR_CLNT_HELLO_B) { 419 /* 420 * we have SSLv3/TLSv1 in an SSLv2 header (other cases skip this 421 * state) 422 */ 423 424 type = 2; 425 p = s->packet; 426 v[0] = p[3]; /* == SSL3_VERSION_MAJOR */ 427 v[1] = p[4]; 428 429 /*- 430 * An SSLv3/TLSv1 backwards-compatible CLIENT-HELLO in an SSLv2 431 * header is sent directly on the wire, not wrapped as a TLS 432 * record. It's format is: 433 * Byte Content 434 * 0-1 msg_length 435 * 2 msg_type 436 * 3-4 version 437 * 5-6 cipher_spec_length 438 * 7-8 session_id_length 439 * 9-10 challenge_length 440 * ... ... 441 */ 442 n = ((p[0] & 0x7f) << 8) | p[1]; 443 if (n > (1024 * 4)) { 444 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_RECORD_TOO_LARGE); 445 goto err; 446 } 447 if (n < 9) { 448 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, 449 SSL_R_RECORD_LENGTH_MISMATCH); 450 goto err; 451 } 452 453 j = ssl23_read_bytes(s, n + 2); 454 /* 455 * We previously read 11 bytes, so if j > 0, we must have j == n+2 == 456 * s->packet_length. We have at least 11 valid packet bytes. 457 */ 458 if (j <= 0) 459 return (j); 460 461 ssl3_finish_mac(s, s->packet + 2, s->packet_length - 2); 462 463 /* CLIENT-HELLO */ 464 if (s->msg_callback) 465 s->msg_callback(0, SSL2_VERSION, 0, s->packet + 2, 466 s->packet_length - 2, s, s->msg_callback_arg); 467 468 p = s->packet; 469 p += 5; 470 n2s(p, csl); 471 n2s(p, sil); 472 n2s(p, cl); 473 d = (unsigned char *)s->init_buf->data; 474 if ((csl + sil + cl + 11) != s->packet_length) { /* We can't have TLS 475 * extensions in SSL 476 * 2.0 format * 477 * Client Hello, can 478 * we? Error 479 * condition should 480 * be * '>' 481 * otherweise */ 482 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, 483 SSL_R_RECORD_LENGTH_MISMATCH); 484 goto err; 485 } 486 487 /* record header: msg_type ... */ 488 *(d++) = SSL3_MT_CLIENT_HELLO; 489 /* ... and length (actual value will be written later) */ 490 d_len = d; 491 d += 3; 492 493 /* client_version */ 494 *(d++) = SSL3_VERSION_MAJOR; /* == v[0] */ 495 *(d++) = v[1]; 496 497 /* lets populate the random area */ 498 /* get the challenge_length */ 499 i = (cl > SSL3_RANDOM_SIZE) ? SSL3_RANDOM_SIZE : cl; 500 memset(d, 0, SSL3_RANDOM_SIZE); 501 memcpy(&(d[SSL3_RANDOM_SIZE - i]), &(p[csl + sil]), i); 502 d += SSL3_RANDOM_SIZE; 503 504 /* no session-id reuse */ 505 *(d++) = 0; 506 507 /* ciphers */ 508 j = 0; 509 dd = d; 510 d += 2; 511 for (i = 0; i < csl; i += 3) { 512 if (p[i] != 0) 513 continue; 514 *(d++) = p[i + 1]; 515 *(d++) = p[i + 2]; 516 j += 2; 517 } 518 s2n(j, dd); 519 520 /* COMPRESSION */ 521 *(d++) = 1; 522 *(d++) = 0; 523 524#if 0 525 /* copy any remaining data with may be extensions */ 526 p = p + csl + sil + cl; 527 while (p < s->packet + s->packet_length) { 528 *(d++) = *(p++); 529 } 530#endif 531 532 i = (d - (unsigned char *)s->init_buf->data) - 4; 533 l2n3((long)i, d_len); 534 535 /* get the data reused from the init_buf */ 536 s->s3->tmp.reuse_message = 1; 537 s->s3->tmp.message_type = SSL3_MT_CLIENT_HELLO; 538 s->s3->tmp.message_size = i; 539 } 540 541 /* imaginary new state (for program structure): */ 542 /* s->state = SSL23_SR_CLNT_HELLO_C */ 543 544 if (type == 1) { 545#ifdef OPENSSL_NO_SSL2 546 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); 547 goto err; 548#else 549 /* we are talking sslv2 */ 550 /* 551 * we need to clean up the SSLv3/TLSv1 setup and put in the sslv2 552 * stuff. 553 */ 554 555 if (s->s2 == NULL) { 556 if (!ssl2_new(s)) 557 goto err; 558 } else 559 ssl2_clear(s); 560 561 if (s->s3 != NULL) 562 ssl3_free(s); 563 564 if (!BUF_MEM_grow_clean(s->init_buf, 565 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { 566 goto err; 567 } 568 569 s->state = SSL2_ST_GET_CLIENT_HELLO_A; 570 if (s->options & SSL_OP_NO_TLSv1 && s->options & SSL_OP_NO_SSLv3) 571 s->s2->ssl2_rollback = 0; 572 else 573 /* 574 * reject SSL 2.0 session if client supports SSL 3.0 or TLS 1.0 575 * (SSL 3.0 draft/RFC 2246, App. E.2) 576 */ 577 s->s2->ssl2_rollback = 1; 578 579 /* 580 * setup the n bytes we have read so we get them from the sslv2 581 * buffer 582 */ 583 s->rstate = SSL_ST_READ_HEADER; 584 s->packet_length = n; 585 s->packet = &(s->s2->rbuf[0]); 586 memcpy(s->packet, buf, n); 587 s->s2->rbuf_left = n; 588 s->s2->rbuf_offs = 0; 589 590 s->method = SSLv2_server_method(); 591 s->handshake_func = s->method->ssl_accept; 592#endif 593 } 594 595 if ((type == 2) || (type == 3)) { 596 /* 597 * we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) 598 */ 599 const SSL_METHOD *new_method; 600 new_method = ssl23_get_server_method(s->version); 601 if (new_method == NULL) { 602 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); 603 goto err; 604 } 605 s->method = new_method; 606 607 if (!ssl_init_wbio_buffer(s, 1)) 608 goto err; 609 610 /* we are in this state */ 611 s->state = SSL3_ST_SR_CLNT_HELLO_A; 612 613 if (type == 3) { 614 /* 615 * put the 'n' bytes we have read into the input buffer for SSLv3 616 */ 617 s->rstate = SSL_ST_READ_HEADER; 618 s->packet_length = n; 619 if (s->s3->rbuf.buf == NULL) 620 if (!ssl3_setup_read_buffer(s)) 621 goto err; 622 623 s->packet = &(s->s3->rbuf.buf[0]); 624 memcpy(s->packet, buf, n); 625 s->s3->rbuf.left = n; 626 s->s3->rbuf.offset = 0; 627 } else { 628 s->packet_length = 0; 629 s->s3->rbuf.left = 0; 630 s->s3->rbuf.offset = 0; 631 } 632#if 0 /* ssl3_get_client_hello does this */ 633 s->client_version = (v[0] << 8) | v[1]; 634#endif 635 s->handshake_func = s->method->ssl_accept; 636 } 637 638 if ((type < 1) || (type > 3)) { 639 /* bad, very bad */ 640 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL); 641 goto err; 642 } 643 s->init_num = 0; 644 645 if (buf != buf_space) 646 OPENSSL_free(buf); 647 return (SSL_accept(s)); 648 err: 649 if (buf != buf_space) 650 OPENSSL_free(buf); 651 return (-1); 652} 653