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| 1 /* ssl/s23_clnt.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 | |
| 119 static const SSL_METHOD *ssl23_get_client_method(int ver); | |
| 120 static int ssl23_client_hello(SSL *s); | |
| 121 static int ssl23_get_server_hello(SSL *s); | |
| 122 static const SSL_METHOD *ssl23_get_client_method(int ver) | |
| 123 { | |
| 124 #ifndef OPENSSL_NO_SSL2 | |
| 125 if (ver == SSL2_VERSION) | |
| 126 return(SSLv2_client_method()); | |
| 127 #endif | |
| 128 if (ver == SSL3_VERSION) | |
| 129 return(SSLv3_client_method()); | |
| 130 else if (ver == TLS1_VERSION) | |
| 131 return(TLSv1_client_method()); | |
| 132 else if (ver == TLS1_1_VERSION) | |
| 133 return(TLSv1_1_client_method()); | |
| 134 else if (ver == TLS1_2_VERSION) | |
| 135 return(TLSv1_2_client_method()); | |
| 136 else | |
| 137 return(NULL); | |
| 138 } | |
| 139 | |
| 140 IMPLEMENT_ssl23_meth_func(SSLv23_client_method, | |
| 141 ssl_undefined_function, | |
| 142 ssl23_connect, | |
| 143 ssl23_get_client_method) | |
| 144 | |
| 145 int ssl23_connect(SSL *s) | |
| 146 { | |
| 147 BUF_MEM *buf=NULL; | |
| 148 unsigned long Time=(unsigned long)time(NULL); | |
| 149 void (*cb)(const SSL *ssl,int type,int val)=NULL; | |
| 150 int ret= -1; | |
| 151 int new_state,state; | |
| 152 | |
| 153 RAND_add(&Time,sizeof(Time),0); | |
| 154 ERR_clear_error(); | |
| 155 clear_sys_error(); | |
| 156 | |
| 157 if (s->info_callback != NULL) | |
| 158 cb=s->info_callback; | |
| 159 else if (s->ctx->info_callback != NULL) | |
| 160 cb=s->ctx->info_callback; | |
| 161 | |
| 162 s->in_handshake++; | |
| 163 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); | |
| 164 | |
| 165 for (;;) | |
| 166 { | |
| 167 state=s->state; | |
| 168 | |
| 169 switch(s->state) | |
| 170 { | |
| 171 case SSL_ST_BEFORE: | |
| 172 case SSL_ST_CONNECT: | |
| 173 case SSL_ST_BEFORE|SSL_ST_CONNECT: | |
| 174 case SSL_ST_OK|SSL_ST_CONNECT: | |
| 175 | |
| 176 if (s->session != NULL) | |
| 177 { | |
| 178 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SES
SION_ID_REUSE); | |
| 179 ret= -1; | |
| 180 goto end; | |
| 181 } | |
| 182 s->server=0; | |
| 183 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); | |
| 184 | |
| 185 /* s->version=TLS1_VERSION; */ | |
| 186 s->type=SSL_ST_CONNECT; | |
| 187 | |
| 188 if (s->init_buf == NULL) | |
| 189 { | |
| 190 if ((buf=BUF_MEM_new()) == NULL) | |
| 191 { | |
| 192 ret= -1; | |
| 193 goto end; | |
| 194 } | |
| 195 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
| 196 { | |
| 197 ret= -1; | |
| 198 goto end; | |
| 199 } | |
| 200 s->init_buf=buf; | |
| 201 buf=NULL; | |
| 202 } | |
| 203 | |
| 204 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } | |
| 205 | |
| 206 ssl3_init_finished_mac(s); | |
| 207 | |
| 208 s->state=SSL23_ST_CW_CLNT_HELLO_A; | |
| 209 s->ctx->stats.sess_connect++; | |
| 210 s->init_num=0; | |
| 211 break; | |
| 212 | |
| 213 case SSL23_ST_CW_CLNT_HELLO_A: | |
| 214 case SSL23_ST_CW_CLNT_HELLO_B: | |
| 215 | |
| 216 s->shutdown=0; | |
| 217 ret=ssl23_client_hello(s); | |
| 218 if (ret <= 0) goto end; | |
| 219 s->state=SSL23_ST_CR_SRVR_HELLO_A; | |
| 220 s->init_num=0; | |
| 221 | |
| 222 break; | |
| 223 | |
| 224 case SSL23_ST_CR_SRVR_HELLO_A: | |
| 225 case SSL23_ST_CR_SRVR_HELLO_B: | |
| 226 ret=ssl23_get_server_hello(s); | |
| 227 if (ret >= 0) cb=NULL; | |
| 228 goto end; | |
| 229 /* break; */ | |
| 230 | |
| 231 default: | |
| 232 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE); | |
| 233 ret= -1; | |
| 234 goto end; | |
| 235 /* break; */ | |
| 236 } | |
| 237 | |
| 238 if (s->debug) { (void)BIO_flush(s->wbio); } | |
| 239 | |
| 240 if ((cb != NULL) && (s->state != state)) | |
| 241 { | |
| 242 new_state=s->state; | |
| 243 s->state=state; | |
| 244 cb(s,SSL_CB_CONNECT_LOOP,1); | |
| 245 s->state=new_state; | |
| 246 } | |
| 247 } | |
| 248 end: | |
| 249 s->in_handshake--; | |
| 250 if (buf != NULL) | |
| 251 BUF_MEM_free(buf); | |
| 252 if (cb != NULL) | |
| 253 cb(s,SSL_CB_CONNECT_EXIT,ret); | |
| 254 return(ret); | |
| 255 } | |
| 256 | |
| 257 static int ssl23_no_ssl2_ciphers(SSL *s) | |
| 258 { | |
| 259 SSL_CIPHER *cipher; | |
| 260 STACK_OF(SSL_CIPHER) *ciphers; | |
| 261 int i; | |
| 262 ciphers = SSL_get_ciphers(s); | |
| 263 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) | |
| 264 { | |
| 265 cipher = sk_SSL_CIPHER_value(ciphers, i); | |
| 266 if (cipher->algorithm_ssl == SSL_SSLV2) | |
| 267 return 0; | |
| 268 } | |
| 269 return 1; | |
| 270 } | |
| 271 | |
| 272 static int ssl23_client_hello(SSL *s) | |
| 273 { | |
| 274 unsigned char *buf; | |
| 275 unsigned char *p,*d; | |
| 276 int i,ch_len; | |
| 277 unsigned long Time,l; | |
| 278 int ssl2_compat; | |
| 279 int version = 0, version_major, version_minor; | |
| 280 #ifndef OPENSSL_NO_COMP | |
| 281 int j; | |
| 282 SSL_COMP *comp; | |
| 283 #endif | |
| 284 int ret; | |
| 285 unsigned long mask, options = s->options; | |
| 286 | |
| 287 ssl2_compat = (options & SSL_OP_NO_SSLv2) ? 0 : 1; | |
| 288 | |
| 289 if (ssl2_compat && ssl23_no_ssl2_ciphers(s)) | |
| 290 ssl2_compat = 0; | |
| 291 | |
| 292 /* | |
| 293 * SSL_OP_NO_X disables all protocols above X *if* there are | |
| 294 * some protocols below X enabled. This is required in order | |
| 295 * to maintain "version capability" vector contiguous. So | |
| 296 * that if application wants to disable TLS1.0 in favour of | |
| 297 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the | |
| 298 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. | |
| 299 */ | |
| 300 mask = SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1 | |
| 301 #if !defined(OPENSSL_NO_SSL3) | |
| 302 |SSL_OP_NO_SSLv3 | |
| 303 #endif | |
| 304 #if !defined(OPENSSL_NO_SSL2) | |
| 305 |(ssl2_compat?SSL_OP_NO_SSLv2:0) | |
| 306 #endif | |
| 307 ; | |
| 308 #if !defined(OPENSSL_NO_TLS1_2_CLIENT) | |
| 309 version = TLS1_2_VERSION; | |
| 310 | |
| 311 if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask) | |
| 312 version = TLS1_1_VERSION; | |
| 313 #else | |
| 314 version = TLS1_1_VERSION; | |
| 315 #endif | |
| 316 mask &= ~SSL_OP_NO_TLSv1_1; | |
| 317 if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) | |
| 318 version = TLS1_VERSION; | |
| 319 mask &= ~SSL_OP_NO_TLSv1; | |
| 320 #if !defined(OPENSSL_NO_SSL3) | |
| 321 if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) | |
| 322 version = SSL3_VERSION; | |
| 323 mask &= ~SSL_OP_NO_SSLv3; | |
| 324 #endif | |
| 325 #if !defined(OPENSSL_NO_SSL2) | |
| 326 if ((options & SSL_OP_NO_SSLv3) && (options & mask) != mask) | |
| 327 version = SSL2_VERSION; | |
| 328 #endif | |
| 329 | |
| 330 #ifndef OPENSSL_NO_TLSEXT | |
| 331 if (version != SSL2_VERSION) | |
| 332 { | |
| 333 /* have to disable SSL 2.0 compatibility if we need TLS extensio
ns */ | |
| 334 | |
| 335 if (s->tlsext_hostname != NULL) | |
| 336 ssl2_compat = 0; | |
| 337 if (s->tlsext_status_type != -1) | |
| 338 ssl2_compat = 0; | |
| 339 #ifdef TLSEXT_TYPE_opaque_prf_input | |
| 340 if (s->ctx->tlsext_opaque_prf_input_callback != 0 || s->tlsext_o
paque_prf_input != NULL) | |
| 341 ssl2_compat = 0; | |
| 342 #endif | |
| 343 } | |
| 344 #endif | |
| 345 | |
| 346 buf=(unsigned char *)s->init_buf->data; | |
| 347 if (s->state == SSL23_ST_CW_CLNT_HELLO_A) | |
| 348 { | |
| 349 #if 0 | |
| 350 /* don't reuse session-id's */ | |
| 351 if (!ssl_get_new_session(s,0)) | |
| 352 { | |
| 353 return(-1); | |
| 354 } | |
| 355 #endif | |
| 356 | |
| 357 p=s->s3->client_random; | |
| 358 Time=(unsigned long)time(NULL); /* Time */ | |
| 359 l2n(Time,p); | |
| 360 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) | |
| 361 return -1; | |
| 362 | |
| 363 if (version == TLS1_2_VERSION) | |
| 364 { | |
| 365 version_major = TLS1_2_VERSION_MAJOR; | |
| 366 version_minor = TLS1_2_VERSION_MINOR; | |
| 367 } | |
| 368 else if (version == TLS1_1_VERSION) | |
| 369 { | |
| 370 version_major = TLS1_1_VERSION_MAJOR; | |
| 371 version_minor = TLS1_1_VERSION_MINOR; | |
| 372 } | |
| 373 else if (version == TLS1_VERSION) | |
| 374 { | |
| 375 version_major = TLS1_VERSION_MAJOR; | |
| 376 version_minor = TLS1_VERSION_MINOR; | |
| 377 } | |
| 378 #ifdef OPENSSL_FIPS | |
| 379 else if(FIPS_mode()) | |
| 380 { | |
| 381 SSLerr(SSL_F_SSL23_CLIENT_HELLO, | |
| 382 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
| 383 return -1; | |
| 384 } | |
| 385 #endif | |
| 386 else if (version == SSL3_VERSION) | |
| 387 { | |
| 388 version_major = SSL3_VERSION_MAJOR; | |
| 389 version_minor = SSL3_VERSION_MINOR; | |
| 390 } | |
| 391 else if (version == SSL2_VERSION) | |
| 392 { | |
| 393 version_major = SSL2_VERSION_MAJOR; | |
| 394 version_minor = SSL2_VERSION_MINOR; | |
| 395 } | |
| 396 else | |
| 397 { | |
| 398 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAIL
ABLE); | |
| 399 return(-1); | |
| 400 } | |
| 401 | |
| 402 s->client_version = version; | |
| 403 | |
| 404 if (ssl2_compat) | |
| 405 { | |
| 406 /* create SSL 2.0 compatible Client Hello */ | |
| 407 | |
| 408 /* two byte record header will be written last */ | |
| 409 d = &(buf[2]); | |
| 410 p = d + 9; /* leave space for message type, version, ind
ividual length fields */ | |
| 411 | |
| 412 *(d++) = SSL2_MT_CLIENT_HELLO; | |
| 413 *(d++) = version_major; | |
| 414 *(d++) = version_minor; | |
| 415 | |
| 416 /* Ciphers supported */ | |
| 417 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0); | |
| 418 if (i == 0) | |
| 419 { | |
| 420 /* no ciphers */ | |
| 421 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS
_AVAILABLE); | |
| 422 return -1; | |
| 423 } | |
| 424 s2n(i,d); | |
| 425 p+=i; | |
| 426 | |
| 427 /* put in the session-id length (zero since there is no
reuse) */ | |
| 428 #if 0 | |
| 429 s->session->session_id_length=0; | |
| 430 #endif | |
| 431 s2n(0,d); | |
| 432 | |
| 433 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) | |
| 434 ch_len=SSL2_CHALLENGE_LENGTH; | |
| 435 else | |
| 436 ch_len=SSL2_MAX_CHALLENGE_LENGTH; | |
| 437 | |
| 438 /* write out sslv2 challenge */ | |
| 439 /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), | |
| 440 because it is one of SSL2_MAX_CHALLENGE_LENGTH (32) | |
| 441 or SSL2_MAX_CHALLENGE_LENGTH (16), but leave the | |
| 442 check in for futurproofing */ | |
| 443 if (SSL3_RANDOM_SIZE < ch_len) | |
| 444 i=SSL3_RANDOM_SIZE; | |
| 445 else | |
| 446 i=ch_len; | |
| 447 s2n(i,d); | |
| 448 memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE); | |
| 449 if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM
_SIZE-i]),i) <= 0) | |
| 450 return -1; | |
| 451 | |
| 452 memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); | |
| 453 p+=i; | |
| 454 | |
| 455 i= p- &(buf[2]); | |
| 456 buf[0]=((i>>8)&0xff)|0x80; | |
| 457 buf[1]=(i&0xff); | |
| 458 | |
| 459 /* number of bytes to write */ | |
| 460 s->init_num=i+2; | |
| 461 s->init_off=0; | |
| 462 | |
| 463 ssl3_finish_mac(s,&(buf[2]),i); | |
| 464 } | |
| 465 else | |
| 466 { | |
| 467 /* create Client Hello in SSL 3.0/TLS 1.0 format */ | |
| 468 | |
| 469 /* do the record header (5 bytes) and handshake message | |
| 470 * header (4 bytes) last. Note: the final argument to | |
| 471 * ssl_add_clienthello_tlsext below depends on the size | |
| 472 * of this prefix. */ | |
| 473 d = p = &(buf[9]); | |
| 474 | |
| 475 *(p++) = version_major; | |
| 476 *(p++) = version_minor; | |
| 477 | |
| 478 /* Random stuff */ | |
| 479 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
| 480 p += SSL3_RANDOM_SIZE; | |
| 481 | |
| 482 /* Session ID (zero since there is no reuse) */ | |
| 483 *(p++) = 0; | |
| 484 | |
| 485 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ | |
| 486 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),
ssl3_put_cipher_by_char); | |
| 487 if (i == 0) | |
| 488 { | |
| 489 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS
_AVAILABLE); | |
| 490 return -1; | |
| 491 } | |
| 492 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH | |
| 493 /* Some servers hang if client hello > 256 bytes | |
| 494 * as hack workaround chop number of supported ciphers | |
| 495 * to keep it well below this if we use TLS v1.2 | |
| 496 */ | |
| 497 if (TLS1_get_version(s) >= TLS1_2_VERSION | |
| 498 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
| 499 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
| 500 #endif | |
| 501 s2n(i,p); | |
| 502 p+=i; | |
| 503 | |
| 504 /* COMPRESSION */ | |
| 505 #ifdef OPENSSL_NO_COMP | |
| 506 *(p++)=1; | |
| 507 #else | |
| 508 if ((s->options & SSL_OP_NO_COMPRESSION) | |
| 509 || !s->ctx->comp_methods) | |
| 510 j=0; | |
| 511 else | |
| 512 j=sk_SSL_COMP_num(s->ctx->comp_methods); | |
| 513 *(p++)=1+j; | |
| 514 for (i=0; i<j; i++) | |
| 515 { | |
| 516 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); | |
| 517 *(p++)=comp->id; | |
| 518 } | |
| 519 #endif | |
| 520 *(p++)=0; /* Add the NULL method */ | |
| 521 | |
| 522 #ifndef OPENSSL_NO_TLSEXT | |
| 523 /* TLS extensions*/ | |
| 524 if (ssl_prepare_clienthello_tlsext(s) <= 0) | |
| 525 { | |
| 526 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELL
O_TLSEXT); | |
| 527 return -1; | |
| 528 } | |
| 529 /* The buffer includes the 5 byte record header, so | |
| 530 * subtract it to compute hlen for | |
| 531 * ssl_add_clienthello_tlsext. */ | |
| 532 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MA
X_PLAIN_LENGTH, p-buf-5)) == NULL) | |
| 533 { | |
| 534 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_E
RROR); | |
| 535 return -1; | |
| 536 } | |
| 537 #endif | |
| 538 | |
| 539 l = p-d; | |
| 540 | |
| 541 /* fill in 4-byte handshake header */ | |
| 542 d=&(buf[5]); | |
| 543 *(d++)=SSL3_MT_CLIENT_HELLO; | |
| 544 l2n3(l,d); | |
| 545 | |
| 546 l += 4; | |
| 547 | |
| 548 if (l > SSL3_RT_MAX_PLAIN_LENGTH) | |
| 549 { | |
| 550 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_E
RROR); | |
| 551 return -1; | |
| 552 } | |
| 553 | |
| 554 /* fill in 5-byte record header */ | |
| 555 d=buf; | |
| 556 *(d++) = SSL3_RT_HANDSHAKE; | |
| 557 *(d++) = version_major; | |
| 558 /* Some servers hang if we use long client hellos | |
| 559 * and a record number > TLS 1.0. | |
| 560 */ | |
| 561 if (TLS1_get_client_version(s) > TLS1_VERSION) | |
| 562 *(d++) = 1; | |
| 563 else | |
| 564 *(d++) = version_minor; | |
| 565 s2n((int)l,d); | |
| 566 | |
| 567 /* number of bytes to write */ | |
| 568 s->init_num=p-buf; | |
| 569 s->init_off=0; | |
| 570 | |
| 571 ssl3_finish_mac(s,&(buf[5]), s->init_num - 5); | |
| 572 } | |
| 573 | |
| 574 s->state=SSL23_ST_CW_CLNT_HELLO_B; | |
| 575 s->init_off=0; | |
| 576 } | |
| 577 | |
| 578 /* SSL3_ST_CW_CLNT_HELLO_B */ | |
| 579 ret = ssl23_write_bytes(s); | |
| 580 | |
| 581 if ((ret >= 2) && s->msg_callback) | |
| 582 { | |
| 583 /* Client Hello has been sent; tell msg_callback */ | |
| 584 | |
| 585 if (ssl2_compat) | |
| 586 s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2,
ret-2, s, s->msg_callback_arg); | |
| 587 else | |
| 588 s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_b
uf->data+5, ret-5, s, s->msg_callback_arg); | |
| 589 } | |
| 590 | |
| 591 return ret; | |
| 592 } | |
| 593 | |
| 594 static int ssl23_get_server_hello(SSL *s) | |
| 595 { | |
| 596 char buf[8]; | |
| 597 unsigned char *p; | |
| 598 int i; | |
| 599 int n; | |
| 600 | |
| 601 n=ssl23_read_bytes(s,7); | |
| 602 | |
| 603 if (n != 7) return(n); | |
| 604 p=s->packet; | |
| 605 | |
| 606 memcpy(buf,p,n); | |
| 607 | |
| 608 if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) && | |
| 609 (p[5] == 0x00) && (p[6] == 0x02)) | |
| 610 { | |
| 611 #ifdef OPENSSL_NO_SSL2 | |
| 612 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); | |
| 613 goto err; | |
| 614 #else | |
| 615 /* we are talking sslv2 */ | |
| 616 /* we need to clean up the SSLv3 setup and put in the | |
| 617 * sslv2 stuff. */ | |
| 618 int ch_len; | |
| 619 | |
| 620 if (s->options & SSL_OP_NO_SSLv2) | |
| 621 { | |
| 622 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PR
OTOCOL); | |
| 623 goto err; | |
| 624 } | |
| 625 if (s->s2 == NULL) | |
| 626 { | |
| 627 if (!ssl2_new(s)) | |
| 628 goto err; | |
| 629 } | |
| 630 else | |
| 631 ssl2_clear(s); | |
| 632 | |
| 633 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) | |
| 634 ch_len=SSL2_CHALLENGE_LENGTH; | |
| 635 else | |
| 636 ch_len=SSL2_MAX_CHALLENGE_LENGTH; | |
| 637 | |
| 638 /* write out sslv2 challenge */ | |
| 639 /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because | |
| 640 it is one of SSL2_MAX_CHALLENGE_LENGTH (32) or | |
| 641 SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for | |
| 642 futurproofing */ | |
| 643 i=(SSL3_RANDOM_SIZE < ch_len) | |
| 644 ?SSL3_RANDOM_SIZE:ch_len; | |
| 645 s->s2->challenge_length=i; | |
| 646 memcpy(s->s2->challenge, | |
| 647 &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); | |
| 648 | |
| 649 if (s->s3 != NULL) ssl3_free(s); | |
| 650 | |
| 651 if (!BUF_MEM_grow_clean(s->init_buf, | |
| 652 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) | |
| 653 { | |
| 654 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); | |
| 655 goto err; | |
| 656 } | |
| 657 | |
| 658 s->state=SSL2_ST_GET_SERVER_HELLO_A; | |
| 659 if (!(s->client_version == SSL2_VERSION)) | |
| 660 /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2
) */ | |
| 661 s->s2->ssl2_rollback=1; | |
| 662 | |
| 663 /* setup the 7 bytes we have read so we get them from | |
| 664 * the sslv2 buffer */ | |
| 665 s->rstate=SSL_ST_READ_HEADER; | |
| 666 s->packet_length=n; | |
| 667 s->packet= &(s->s2->rbuf[0]); | |
| 668 memcpy(s->packet,buf,n); | |
| 669 s->s2->rbuf_left=n; | |
| 670 s->s2->rbuf_offs=0; | |
| 671 | |
| 672 /* we have already written one */ | |
| 673 s->s2->write_sequence=1; | |
| 674 | |
| 675 s->method=SSLv2_client_method(); | |
| 676 s->handshake_func=s->method->ssl_connect; | |
| 677 #endif | |
| 678 } | |
| 679 else if (p[1] == SSL3_VERSION_MAJOR && | |
| 680 p[2] <= TLS1_2_VERSION_MINOR && | |
| 681 ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) || | |
| 682 (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2))) | |
| 683 { | |
| 684 /* we have sslv3 or tls1 (server hello or alert) */ | |
| 685 | |
| 686 if ((p[2] == SSL3_VERSION_MINOR) && | |
| 687 !(s->options & SSL_OP_NO_SSLv3)) | |
| 688 { | |
| 689 #ifdef OPENSSL_FIPS | |
| 690 if(FIPS_mode()) | |
| 691 { | |
| 692 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, | |
| 693 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
| 694 goto err; | |
| 695 } | |
| 696 #endif | |
| 697 s->version=SSL3_VERSION; | |
| 698 s->method=SSLv3_client_method(); | |
| 699 } | |
| 700 else if ((p[2] == TLS1_VERSION_MINOR) && | |
| 701 !(s->options & SSL_OP_NO_TLSv1)) | |
| 702 { | |
| 703 s->version=TLS1_VERSION; | |
| 704 s->method=TLSv1_client_method(); | |
| 705 } | |
| 706 else if ((p[2] == TLS1_1_VERSION_MINOR) && | |
| 707 !(s->options & SSL_OP_NO_TLSv1_1)) | |
| 708 { | |
| 709 s->version=TLS1_1_VERSION; | |
| 710 s->method=TLSv1_1_client_method(); | |
| 711 } | |
| 712 else if ((p[2] == TLS1_2_VERSION_MINOR) && | |
| 713 !(s->options & SSL_OP_NO_TLSv1_2)) | |
| 714 { | |
| 715 s->version=TLS1_2_VERSION; | |
| 716 s->method=TLSv1_2_client_method(); | |
| 717 } | |
| 718 else | |
| 719 { | |
| 720 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PR
OTOCOL); | |
| 721 goto err; | |
| 722 } | |
| 723 | |
| 724 if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING) | |
| 725 { | |
| 726 /* fatal alert */ | |
| 727 | |
| 728 void (*cb)(const SSL *ssl,int type,int val)=NULL; | |
| 729 int j; | |
| 730 | |
| 731 if (s->info_callback != NULL) | |
| 732 cb=s->info_callback; | |
| 733 else if (s->ctx->info_callback != NULL) | |
| 734 cb=s->ctx->info_callback; | |
| 735 | |
| 736 i=p[5]; | |
| 737 if (cb != NULL) | |
| 738 { | |
| 739 j=(i<<8)|p[6]; | |
| 740 cb(s,SSL_CB_READ_ALERT,j); | |
| 741 } | |
| 742 | |
| 743 if (s->msg_callback) | |
| 744 s->msg_callback(0, s->version, SSL3_RT_ALERT, p+
5, 2, s, s->msg_callback_arg); | |
| 745 | |
| 746 s->rwstate=SSL_NOTHING; | |
| 747 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET
+p[6]); | |
| 748 goto err; | |
| 749 } | |
| 750 | |
| 751 if (!ssl_init_wbio_buffer(s,1)) goto err; | |
| 752 | |
| 753 /* we are in this state */ | |
| 754 s->state=SSL3_ST_CR_SRVR_HELLO_A; | |
| 755 | |
| 756 /* put the 7 bytes we have read into the input buffer | |
| 757 * for SSLv3 */ | |
| 758 s->rstate=SSL_ST_READ_HEADER; | |
| 759 s->packet_length=n; | |
| 760 if (s->s3->rbuf.buf == NULL) | |
| 761 if (!ssl3_setup_read_buffer(s)) | |
| 762 goto err; | |
| 763 s->packet= &(s->s3->rbuf.buf[0]); | |
| 764 memcpy(s->packet,buf,n); | |
| 765 s->s3->rbuf.left=n; | |
| 766 s->s3->rbuf.offset=0; | |
| 767 | |
| 768 s->handshake_func=s->method->ssl_connect; | |
| 769 } | |
| 770 else | |
| 771 { | |
| 772 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL); | |
| 773 goto err; | |
| 774 } | |
| 775 s->init_num=0; | |
| 776 | |
| 777 /* Since, if we are sending a ssl23 client hello, we are not | |
| 778 * reusing a session-id */ | |
| 779 if (!s->session_creation_enabled) | |
| 780 { | |
| 781 if (!(s->client_version == SSL2_VERSION)) | |
| 782 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE
); | |
| 783 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_SESSION_MAY_NOT_BE_CRE
ATED); | |
| 784 goto err; | |
| 785 } | |
| 786 if (!ssl_get_new_session(s,0)) | |
| 787 goto err; | |
| 788 | |
| 789 return(SSL_connect(s)); | |
| 790 err: | |
| 791 return(-1); | |
| 792 } | |
| 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