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| 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 | |
| 122 static const SSL_METHOD *ssl23_get_server_method(int ver); | |
| 123 int ssl23_get_client_hello(SSL *s); | |
| 124 static 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 if (ver == SSL3_VERSION) | |
| 131 return(SSLv3_server_method()); | |
| 132 else if (ver == TLS1_VERSION) | |
| 133 return(TLSv1_server_method()); | |
| 134 else if (ver == TLS1_1_VERSION) | |
| 135 return(TLSv1_1_server_method()); | |
| 136 else if (ver == TLS1_2_VERSION) | |
| 137 return(TLSv1_2_server_method()); | |
| 138 else | |
| 139 return(NULL); | |
| 140 } | |
| 141 | |
| 142 IMPLEMENT_ssl23_meth_func(SSLv23_server_method, | |
| 143 ssl23_accept, | |
| 144 ssl_undefined_function, | |
| 145 ssl23_get_server_method) | |
| 146 | |
| 147 int ssl23_accept(SSL *s) | |
| 148 { | |
| 149 BUF_MEM *buf; | |
| 150 unsigned long Time=(unsigned long)time(NULL); | |
| 151 void (*cb)(const SSL *ssl,int type,int val)=NULL; | |
| 152 int ret= -1; | |
| 153 int new_state,state; | |
| 154 | |
| 155 RAND_add(&Time,sizeof(Time),0); | |
| 156 ERR_clear_error(); | |
| 157 clear_sys_error(); | |
| 158 | |
| 159 if (s->info_callback != NULL) | |
| 160 cb=s->info_callback; | |
| 161 else if (s->ctx->info_callback != NULL) | |
| 162 cb=s->ctx->info_callback; | |
| 163 | |
| 164 s->in_handshake++; | |
| 165 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); | |
| 166 | |
| 167 for (;;) | |
| 168 { | |
| 169 state=s->state; | |
| 170 | |
| 171 switch(s->state) | |
| 172 { | |
| 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) cb(s,SSL_CB_HANDSHAKE_START,1); | |
| 180 | |
| 181 /* s->version=SSL3_VERSION; */ | |
| 182 s->type=SSL_ST_ACCEPT; | |
| 183 | |
| 184 if (s->init_buf == NULL) | |
| 185 { | |
| 186 if ((buf=BUF_MEM_new()) == NULL) | |
| 187 { | |
| 188 ret= -1; | |
| 189 goto end; | |
| 190 } | |
| 191 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
| 192 { | |
| 193 ret= -1; | |
| 194 goto end; | |
| 195 } | |
| 196 s->init_buf=buf; | |
| 197 } | |
| 198 | |
| 199 ssl3_init_finished_mac(s); | |
| 200 | |
| 201 s->state=SSL23_ST_SR_CLNT_HELLO_A; | |
| 202 s->ctx->stats.sess_accept++; | |
| 203 s->init_num=0; | |
| 204 break; | |
| 205 | |
| 206 case SSL23_ST_SR_CLNT_HELLO_A: | |
| 207 case SSL23_ST_SR_CLNT_HELLO_B: | |
| 208 | |
| 209 s->shutdown=0; | |
| 210 ret=ssl23_get_client_hello(s); | |
| 211 if (ret >= 0) 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 { | |
| 224 new_state=s->state; | |
| 225 s->state=state; | |
| 226 cb(s,SSL_CB_ACCEPT_LOOP,1); | |
| 227 s->state=new_state; | |
| 228 } | |
| 229 } | |
| 230 end: | |
| 231 s->in_handshake--; | |
| 232 if (cb != NULL) | |
| 233 cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
| 234 return(ret); | |
| 235 } | |
| 236 | |
| 237 | |
| 238 int ssl23_get_client_hello(SSL *s) | |
| 239 { | |
| 240 char buf_space[11]; /* Request this many bytes in initial read. | |
| 241 * We can detect SSL 3.0/TLS 1.0 Client Hellos | |
| 242 * ('type == 3') correctly only when the following | |
| 243 * is in a single record, which is not guaranteed by | |
| 244 * the protocol specification: | |
| 245 * Byte Content | |
| 246 * 0 type \ | |
| 247 * 1/2 version > record header | |
| 248 * 3/4 length / | |
| 249 * 5 msg_type \ | |
| 250 * 6-8 length > Client Hello message | |
| 251 * 9/10 client_version / | |
| 252 */ | |
| 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 { | |
| 263 /* read the initial header */ | |
| 264 v[0]=v[1]=0; | |
| 265 | |
| 266 if (!ssl3_setup_buffers(s)) goto err; | |
| 267 | |
| 268 n=ssl23_read_bytes(s, sizeof buf_space); | |
| 269 if (n != sizeof buf_space) return(n); /* n == -1 || n == 0 */ | |
| 270 | |
| 271 p=s->packet; | |
| 272 | |
| 273 memcpy(buf,p,n); | |
| 274 | |
| 275 if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO)) | |
| 276 { | |
| 277 /* | |
| 278 * SSLv2 header | |
| 279 */ | |
| 280 if ((p[3] == 0x00) && (p[4] == 0x02)) | |
| 281 { | |
| 282 v[0]=p[3]; v[1]=p[4]; | |
| 283 /* SSLv2 */ | |
| 284 if (!(s->options & SSL_OP_NO_SSLv2)) | |
| 285 type=1; | |
| 286 } | |
| 287 else if (p[3] == SSL3_VERSION_MAJOR) | |
| 288 { | |
| 289 v[0]=p[3]; v[1]=p[4]; | |
| 290 /* SSLv3/TLSv1 */ | |
| 291 if (p[4] >= TLS1_VERSION_MINOR) | |
| 292 { | |
| 293 if (p[4] >= TLS1_2_VERSION_MINOR && | |
| 294 !(s->options & SSL_OP_NO_TLSv1_2)) | |
| 295 { | |
| 296 s->version=TLS1_2_VERSION; | |
| 297 s->state=SSL23_ST_SR_CLNT_HELLO_
B; | |
| 298 } | |
| 299 else if (p[4] >= TLS1_1_VERSION_MINOR && | |
| 300 !(s->options & SSL_OP_NO_TLSv1_1)) | |
| 301 { | |
| 302 s->version=TLS1_1_VERSION; | |
| 303 /* type=2; */ /* done later to s
urvive restarts */ | |
| 304 s->state=SSL23_ST_SR_CLNT_HELLO_
B; | |
| 305 } | |
| 306 else if (!(s->options & SSL_OP_NO_TLSv1)
) | |
| 307 { | |
| 308 s->version=TLS1_VERSION; | |
| 309 /* type=2; */ /* done later to s
urvive restarts */ | |
| 310 s->state=SSL23_ST_SR_CLNT_HELLO_
B; | |
| 311 } | |
| 312 else if (!(s->options & SSL_OP_NO_SSLv3)
) | |
| 313 { | |
| 314 s->version=SSL3_VERSION; | |
| 315 /* type=2; */ | |
| 316 s->state=SSL23_ST_SR_CLNT_HELLO_
B; | |
| 317 } | |
| 318 else if (!(s->options & SSL_OP_NO_SSLv2)
) | |
| 319 { | |
| 320 type=1; | |
| 321 } | |
| 322 } | |
| 323 else if (!(s->options & SSL_OP_NO_SSLv3)) | |
| 324 { | |
| 325 s->version=SSL3_VERSION; | |
| 326 /* type=2; */ | |
| 327 s->state=SSL23_ST_SR_CLNT_HELLO_B; | |
| 328 } | |
| 329 else if (!(s->options & SSL_OP_NO_SSLv2)) | |
| 330 type=1; | |
| 331 | |
| 332 } | |
| 333 } | |
| 334 else if ((p[0] == SSL3_RT_HANDSHAKE) && | |
| 335 (p[1] == SSL3_VERSION_MAJOR) && | |
| 336 (p[5] == SSL3_MT_CLIENT_HELLO) && | |
| 337 ((p[3] == 0 && p[4] < 5 /* silly record length? */) | |
| 338 || (p[9] >= p[1]))) | |
| 339 { | |
| 340 /* | |
| 341 * SSLv3 or tls1 header | |
| 342 */ | |
| 343 | |
| 344 v[0]=p[1]; /* major version (= SSL3_VERSION_MAJOR) */ | |
| 345 /* We must look at client_version inside the Client Hell
o message | |
| 346 * to get the correct minor version. | |
| 347 * However if we have only a pathologically small fragme
nt of the | |
| 348 * Client Hello message, this would be difficult, and we
'd have | |
| 349 * to read more records to find out. | |
| 350 * No known SSL 3.0 client fragments ClientHello like th
is, | |
| 351 * so we simply assume TLS 1.0 to avoid protocol version
downgrade | |
| 352 * attacks. */ | |
| 353 if (p[3] == 0 && p[4] < 6) | |
| 354 { | |
| 355 #if 0 | |
| 356 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD
_TOO_SMALL); | |
| 357 goto err; | |
| 358 #else | |
| 359 v[1] = TLS1_VERSION_MINOR; | |
| 360 #endif | |
| 361 } | |
| 362 /* if major version number > 3 set minor to a value | |
| 363 * which will use the highest version 3 we support. | |
| 364 * If TLS 2.0 ever appears we will need to revise | |
| 365 * this.... | |
| 366 */ | |
| 367 else if (p[9] > SSL3_VERSION_MAJOR) | |
| 368 v[1]=0xff; | |
| 369 else | |
| 370 v[1]=p[10]; /* minor version according to client
_version */ | |
| 371 if (v[1] >= TLS1_VERSION_MINOR) | |
| 372 { | |
| 373 if (v[1] >= TLS1_2_VERSION_MINOR && | |
| 374 !(s->options & SSL_OP_NO_TLSv1_2)) | |
| 375 { | |
| 376 s->version=TLS1_2_VERSION; | |
| 377 type=3; | |
| 378 } | |
| 379 else if (v[1] >= TLS1_1_VERSION_MINOR && | |
| 380 !(s->options & SSL_OP_NO_TLSv1_1)) | |
| 381 { | |
| 382 s->version=TLS1_1_VERSION; | |
| 383 type=3; | |
| 384 } | |
| 385 else if (!(s->options & SSL_OP_NO_TLSv1)) | |
| 386 { | |
| 387 s->version=TLS1_VERSION; | |
| 388 type=3; | |
| 389 } | |
| 390 else if (!(s->options & SSL_OP_NO_SSLv3)) | |
| 391 { | |
| 392 s->version=SSL3_VERSION; | |
| 393 type=3; | |
| 394 } | |
| 395 } | |
| 396 else | |
| 397 { | |
| 398 /* client requests SSL 3.0 */ | |
| 399 if (!(s->options & SSL_OP_NO_SSLv3)) | |
| 400 { | |
| 401 s->version=SSL3_VERSION; | |
| 402 type=3; | |
| 403 } | |
| 404 else if (!(s->options & SSL_OP_NO_TLSv1)) | |
| 405 { | |
| 406 /* we won't be able to use TLS of course
, | |
| 407 * but this will send an appropriate ale
rt */ | |
| 408 s->version=TLS1_VERSION; | |
| 409 type=3; | |
| 410 } | |
| 411 } | |
| 412 } | |
| 413 else if ((strncmp("GET ", (char *)p,4) == 0) || | |
| 414 (strncmp("POST ",(char *)p,5) == 0) || | |
| 415 (strncmp("HEAD ",(char *)p,5) == 0) || | |
| 416 (strncmp("PUT ", (char *)p,4) == 0)) | |
| 417 { | |
| 418 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST); | |
| 419 goto err; | |
| 420 } | |
| 421 else if (strncmp("CONNECT",(char *)p,7) == 0) | |
| 422 { | |
| 423 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_RE
QUEST); | |
| 424 goto err; | |
| 425 } | |
| 426 } | |
| 427 | |
| 428 #ifdef OPENSSL_FIPS | |
| 429 if (FIPS_mode() && (s->version < TLS1_VERSION)) | |
| 430 { | |
| 431 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, | |
| 432 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
| 433 goto err; | |
| 434 } | |
| 435 #endif | |
| 436 | |
| 437 if (s->state == SSL23_ST_SR_CLNT_HELLO_B) | |
| 438 { | |
| 439 /* we have SSLv3/TLSv1 in an SSLv2 header | |
| 440 * (other cases skip this state) */ | |
| 441 | |
| 442 type=2; | |
| 443 p=s->packet; | |
| 444 v[0] = p[3]; /* == SSL3_VERSION_MAJOR */ | |
| 445 v[1] = p[4]; | |
| 446 | |
| 447 n=((p[0]&0x7f)<<8)|p[1]; | |
| 448 if (n > (1024*4)) | |
| 449 { | |
| 450 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LAR
GE); | |
| 451 goto err; | |
| 452 } | |
| 453 | |
| 454 j=ssl23_read_bytes(s,n+2); | |
| 455 if (j <= 0) return(j); | |
| 456 | |
| 457 ssl3_finish_mac(s, s->packet+2, s->packet_length-2); | |
| 458 if (s->msg_callback) | |
| 459 s->msg_callback(0, SSL2_VERSION, 0, s->packet+2, s->pack
et_length-2, s, s->msg_callback_arg); /* CLIENT-HELLO */ | |
| 460 | |
| 461 p=s->packet; | |
| 462 p+=5; | |
| 463 n2s(p,csl); | |
| 464 n2s(p,sil); | |
| 465 n2s(p,cl); | |
| 466 d=(unsigned char *)s->init_buf->data; | |
| 467 if ((csl+sil+cl+11) != s->packet_length) /* We can't have TLS ex
tensions in SSL 2.0 format | |
| 468 * Client Hello, can we
? Error condition should be | |
| 469 * '>' otherweise */ | |
| 470 { | |
| 471 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_
MISMATCH); | |
| 472 goto err; | |
| 473 } | |
| 474 | |
| 475 /* record header: msg_type ... */ | |
| 476 *(d++) = SSL3_MT_CLIENT_HELLO; | |
| 477 /* ... and length (actual value will be written later) */ | |
| 478 d_len = d; | |
| 479 d += 3; | |
| 480 | |
| 481 /* client_version */ | |
| 482 *(d++) = SSL3_VERSION_MAJOR; /* == v[0] */ | |
| 483 *(d++) = v[1]; | |
| 484 | |
| 485 /* lets populate the random area */ | |
| 486 /* get the challenge_length */ | |
| 487 i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl; | |
| 488 memset(d,0,SSL3_RANDOM_SIZE); | |
| 489 memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i); | |
| 490 d+=SSL3_RANDOM_SIZE; | |
| 491 | |
| 492 /* no session-id reuse */ | |
| 493 *(d++)=0; | |
| 494 | |
| 495 /* ciphers */ | |
| 496 j=0; | |
| 497 dd=d; | |
| 498 d+=2; | |
| 499 for (i=0; i<csl; i+=3) | |
| 500 { | |
| 501 if (p[i] != 0) continue; | |
| 502 *(d++)=p[i+1]; | |
| 503 *(d++)=p[i+2]; | |
| 504 j+=2; | |
| 505 } | |
| 506 s2n(j,dd); | |
| 507 | |
| 508 /* COMPRESSION */ | |
| 509 *(d++)=1; | |
| 510 *(d++)=0; | |
| 511 | |
| 512 #if 0 | |
| 513 /* copy any remaining data with may be extensions */ | |
| 514 p = p+csl+sil+cl; | |
| 515 while (p < s->packet+s->packet_length) | |
| 516 { | |
| 517 *(d++)=*(p++); | |
| 518 } | |
| 519 #endif | |
| 520 | |
| 521 i = (d-(unsigned char *)s->init_buf->data) - 4; | |
| 522 l2n3((long)i, d_len); | |
| 523 | |
| 524 /* get the data reused from the init_buf */ | |
| 525 s->s3->tmp.reuse_message=1; | |
| 526 s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO; | |
| 527 s->s3->tmp.message_size=i; | |
| 528 } | |
| 529 | |
| 530 /* imaginary new state (for program structure): */ | |
| 531 /* s->state = SSL23_SR_CLNT_HELLO_C */ | |
| 532 | |
| 533 if (type == 1) | |
| 534 { | |
| 535 #ifdef OPENSSL_NO_SSL2 | |
| 536 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); | |
| 537 goto err; | |
| 538 #else | |
| 539 /* we are talking sslv2 */ | |
| 540 /* we need to clean up the SSLv3/TLSv1 setup and put in the | |
| 541 * sslv2 stuff. */ | |
| 542 | |
| 543 if (s->s2 == NULL) | |
| 544 { | |
| 545 if (!ssl2_new(s)) | |
| 546 goto err; | |
| 547 } | |
| 548 else | |
| 549 ssl2_clear(s); | |
| 550 | |
| 551 if (s->s3 != NULL) ssl3_free(s); | |
| 552 | |
| 553 if (!BUF_MEM_grow_clean(s->init_buf, | |
| 554 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) | |
| 555 { | |
| 556 goto err; | |
| 557 } | |
| 558 | |
| 559 s->state=SSL2_ST_GET_CLIENT_HELLO_A; | |
| 560 if (s->options & SSL_OP_NO_TLSv1 && s->options & SSL_OP_NO_SSLv3
) | |
| 561 s->s2->ssl2_rollback=0; | |
| 562 else | |
| 563 /* reject SSL 2.0 session if client supports SSL 3.0 or
TLS 1.0 | |
| 564 * (SSL 3.0 draft/RFC 2246, App. E.2) */ | |
| 565 s->s2->ssl2_rollback=1; | |
| 566 | |
| 567 /* setup the n bytes we have read so we get them from | |
| 568 * the sslv2 buffer */ | |
| 569 s->rstate=SSL_ST_READ_HEADER; | |
| 570 s->packet_length=n; | |
| 571 s->packet= &(s->s2->rbuf[0]); | |
| 572 memcpy(s->packet,buf,n); | |
| 573 s->s2->rbuf_left=n; | |
| 574 s->s2->rbuf_offs=0; | |
| 575 | |
| 576 s->method=SSLv2_server_method(); | |
| 577 s->handshake_func=s->method->ssl_accept; | |
| 578 #endif | |
| 579 } | |
| 580 | |
| 581 if ((type == 2) || (type == 3)) | |
| 582 { | |
| 583 /* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS sty
le) */ | |
| 584 | |
| 585 if (!ssl_init_wbio_buffer(s,1)) goto err; | |
| 586 | |
| 587 /* we are in this state */ | |
| 588 s->state=SSL3_ST_SR_CLNT_HELLO_A; | |
| 589 | |
| 590 if (type == 3) | |
| 591 { | |
| 592 /* put the 'n' bytes we have read into the input buffer | |
| 593 * for SSLv3 */ | |
| 594 s->rstate=SSL_ST_READ_HEADER; | |
| 595 s->packet_length=n; | |
| 596 if (s->s3->rbuf.buf == NULL) | |
| 597 if (!ssl3_setup_read_buffer(s)) | |
| 598 goto err; | |
| 599 | |
| 600 s->packet= &(s->s3->rbuf.buf[0]); | |
| 601 memcpy(s->packet,buf,n); | |
| 602 s->s3->rbuf.left=n; | |
| 603 s->s3->rbuf.offset=0; | |
| 604 } | |
| 605 else | |
| 606 { | |
| 607 s->packet_length=0; | |
| 608 s->s3->rbuf.left=0; | |
| 609 s->s3->rbuf.offset=0; | |
| 610 } | |
| 611 if (s->version == TLS1_2_VERSION) | |
| 612 s->method = TLSv1_2_server_method(); | |
| 613 else if (s->version == TLS1_1_VERSION) | |
| 614 s->method = TLSv1_1_server_method(); | |
| 615 else if (s->version == TLS1_VERSION) | |
| 616 s->method = TLSv1_server_method(); | |
| 617 else | |
| 618 s->method = SSLv3_server_method(); | |
| 619 #if 0 /* ssl3_get_client_hello does this */ | |
| 620 s->client_version=(v[0]<<8)|v[1]; | |
| 621 #endif | |
| 622 s->handshake_func=s->method->ssl_accept; | |
| 623 } | |
| 624 | |
| 625 if ((type < 1) || (type > 3)) | |
| 626 { | |
| 627 /* bad, very bad */ | |
| 628 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL); | |
| 629 goto err; | |
| 630 } | |
| 631 s->init_num=0; | |
| 632 | |
| 633 if (buf != buf_space) OPENSSL_free(buf); | |
| 634 return(SSL_accept(s)); | |
| 635 err: | |
| 636 if (buf != buf_space) OPENSSL_free(buf); | |
| 637 return(-1); | |
| 638 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master