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main_repo / deps / openssl / openssl / ssl / d1_clnt.c @ aa3b4b4d
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| 1 |
/* ssl/d1_clnt.c */
|
|---|---|
| 2 |
/*
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| 3 |
* DTLS implementation written by Nagendra Modadugu
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| 4 |
* (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
|
| 5 |
*/
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| 6 |
/* ====================================================================
|
| 7 |
* Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
|
| 8 |
*
|
| 9 |
* Redistribution and use in source and binary forms, with or without
|
| 10 |
* modification, are permitted provided that the following conditions
|
| 11 |
* are met:
|
| 12 |
*
|
| 13 |
* 1. Redistributions of source code must retain the above copyright
|
| 14 |
* notice, this list of conditions and the following disclaimer.
|
| 15 |
*
|
| 16 |
* 2. Redistributions in binary form must reproduce the above copyright
|
| 17 |
* notice, this list of conditions and the following disclaimer in
|
| 18 |
* the documentation and/or other materials provided with the
|
| 19 |
* distribution.
|
| 20 |
*
|
| 21 |
* 3. All advertising materials mentioning features or use of this
|
| 22 |
* software must display the following acknowledgment:
|
| 23 |
* "This product includes software developed by the OpenSSL Project
|
| 24 |
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
| 25 |
*
|
| 26 |
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
| 27 |
* endorse or promote products derived from this software without
|
| 28 |
* prior written permission. For written permission, please contact
|
| 29 |
* openssl-core@OpenSSL.org.
|
| 30 |
*
|
| 31 |
* 5. Products derived from this software may not be called "OpenSSL"
|
| 32 |
* nor may "OpenSSL" appear in their names without prior written
|
| 33 |
* permission of the OpenSSL Project.
|
| 34 |
*
|
| 35 |
* 6. Redistributions of any form whatsoever must retain the following
|
| 36 |
* acknowledgment:
|
| 37 |
* "This product includes software developed by the OpenSSL Project
|
| 38 |
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
| 39 |
*
|
| 40 |
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
| 41 |
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 42 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
| 43 |
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
| 44 |
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
| 45 |
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
| 46 |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
| 47 |
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
| 48 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
| 49 |
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
| 50 |
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
| 51 |
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
| 52 |
* ====================================================================
|
| 53 |
*
|
| 54 |
* This product includes cryptographic software written by Eric Young
|
| 55 |
* (eay@cryptsoft.com). This product includes software written by Tim
|
| 56 |
* Hudson (tjh@cryptsoft.com).
|
| 57 |
*
|
| 58 |
*/
|
| 59 |
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
|
| 60 |
* All rights reserved.
|
| 61 |
*
|
| 62 |
* This package is an SSL implementation written
|
| 63 |
* by Eric Young (eay@cryptsoft.com).
|
| 64 |
* The implementation was written so as to conform with Netscapes SSL.
|
| 65 |
*
|
| 66 |
* This library is free for commercial and non-commercial use as long as
|
| 67 |
* the following conditions are aheared to. The following conditions
|
| 68 |
* apply to all code found in this distribution, be it the RC4, RSA,
|
| 69 |
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
|
| 70 |
* included with this distribution is covered by the same copyright terms
|
| 71 |
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
|
| 72 |
*
|
| 73 |
* Copyright remains Eric Young's, and as such any Copyright notices in
|
| 74 |
* the code are not to be removed.
|
| 75 |
* If this package is used in a product, Eric Young should be given attribution
|
| 76 |
* as the author of the parts of the library used.
|
| 77 |
* This can be in the form of a textual message at program startup or
|
| 78 |
* in documentation (online or textual) provided with the package.
|
| 79 |
*
|
| 80 |
* Redistribution and use in source and binary forms, with or without
|
| 81 |
* modification, are permitted provided that the following conditions
|
| 82 |
* are met:
|
| 83 |
* 1. Redistributions of source code must retain the copyright
|
| 84 |
* notice, this list of conditions and the following disclaimer.
|
| 85 |
* 2. Redistributions in binary form must reproduce the above copyright
|
| 86 |
* notice, this list of conditions and the following disclaimer in the
|
| 87 |
* documentation and/or other materials provided with the distribution.
|
| 88 |
* 3. All advertising materials mentioning features or use of this software
|
| 89 |
* must display the following acknowledgement:
|
| 90 |
* "This product includes cryptographic software written by
|
| 91 |
* Eric Young (eay@cryptsoft.com)"
|
| 92 |
* The word 'cryptographic' can be left out if the rouines from the library
|
| 93 |
* being used are not cryptographic related :-).
|
| 94 |
* 4. If you include any Windows specific code (or a derivative thereof) from
|
| 95 |
* the apps directory (application code) you must include an acknowledgement:
|
| 96 |
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
|
| 97 |
*
|
| 98 |
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
|
| 99 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 100 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
| 101 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
| 102 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
| 103 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
| 104 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
| 105 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
| 106 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
| 107 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
| 108 |
* SUCH DAMAGE.
|
| 109 |
*
|
| 110 |
* The licence and distribution terms for any publically available version or
|
| 111 |
* derivative of this code cannot be changed. i.e. this code cannot simply be
|
| 112 |
* copied and put under another distribution licence
|
| 113 |
* [including the GNU Public Licence.]
|
| 114 |
*/
|
| 115 |
|
| 116 |
#include <stdio.h> |
| 117 |
#include "ssl_locl.h" |
| 118 |
#ifndef OPENSSL_NO_KRB5
|
| 119 |
#include "kssl_lcl.h" |
| 120 |
#endif
|
| 121 |
#include <openssl/buffer.h> |
| 122 |
#include <openssl/rand.h> |
| 123 |
#include <openssl/objects.h> |
| 124 |
#include <openssl/evp.h> |
| 125 |
#include <openssl/md5.h> |
| 126 |
#include <openssl/bn.h> |
| 127 |
#ifndef OPENSSL_NO_DH
|
| 128 |
#include <openssl/dh.h> |
| 129 |
#endif
|
| 130 |
|
| 131 |
static const SSL_METHOD *dtls1_get_client_method(int ver); |
| 132 |
static int dtls1_get_hello_verify(SSL *s); |
| 133 |
|
| 134 |
static const SSL_METHOD *dtls1_get_client_method(int ver) |
| 135 |
{
|
| 136 |
if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
|
| 137 |
return(DTLSv1_client_method());
|
| 138 |
else
|
| 139 |
return(NULL); |
| 140 |
} |
| 141 |
|
| 142 |
IMPLEMENT_dtls1_meth_func(DTLSv1_client_method, |
| 143 |
ssl_undefined_function, |
| 144 |
dtls1_connect, |
| 145 |
dtls1_get_client_method) |
| 146 |
|
| 147 |
int dtls1_connect(SSL *s)
|
| 148 |
{
|
| 149 |
BUF_MEM *buf=NULL;
|
| 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,skip=0; |
| 154 |
#ifndef OPENSSL_NO_SCTP
|
| 155 |
unsigned char sctpauthkey[64]; |
| 156 |
char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; |
| 157 |
#endif
|
| 158 |
|
| 159 |
RAND_add(&Time,sizeof(Time),0); |
| 160 |
ERR_clear_error(); |
| 161 |
clear_sys_error(); |
| 162 |
|
| 163 |
if (s->info_callback != NULL) |
| 164 |
cb=s->info_callback; |
| 165 |
else if (s->ctx->info_callback != NULL) |
| 166 |
cb=s->ctx->info_callback; |
| 167 |
|
| 168 |
s->in_handshake++; |
| 169 |
if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
|
| 170 |
|
| 171 |
#ifndef OPENSSL_NO_SCTP
|
| 172 |
/* Notify SCTP BIO socket to enter handshake
|
| 173 |
* mode and prevent stream identifier other
|
| 174 |
* than 0. Will be ignored if no SCTP is used.
|
| 175 |
*/
|
| 176 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
|
| 177 |
#endif
|
| 178 |
|
| 179 |
#ifndef OPENSSL_NO_HEARTBEATS
|
| 180 |
/* If we're awaiting a HeartbeatResponse, pretend we
|
| 181 |
* already got and don't await it anymore, because
|
| 182 |
* Heartbeats don't make sense during handshakes anyway.
|
| 183 |
*/
|
| 184 |
if (s->tlsext_hb_pending)
|
| 185 |
{
|
| 186 |
dtls1_stop_timer(s); |
| 187 |
s->tlsext_hb_pending = 0;
|
| 188 |
s->tlsext_hb_seq++; |
| 189 |
} |
| 190 |
#endif
|
| 191 |
|
| 192 |
for (;;)
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| 193 |
{
|
| 194 |
state=s->state; |
| 195 |
|
| 196 |
switch(s->state)
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| 197 |
{
|
| 198 |
case SSL_ST_RENEGOTIATE:
|
| 199 |
s->renegotiate=1;
|
| 200 |
s->state=SSL_ST_CONNECT; |
| 201 |
s->ctx->stats.sess_connect_renegotiate++; |
| 202 |
/* break */
|
| 203 |
case SSL_ST_BEFORE:
|
| 204 |
case SSL_ST_CONNECT:
|
| 205 |
case SSL_ST_BEFORE|SSL_ST_CONNECT:
|
| 206 |
case SSL_ST_OK|SSL_ST_CONNECT:
|
| 207 |
|
| 208 |
s->server=0;
|
| 209 |
if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
| 210 |
|
| 211 |
if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) && |
| 212 |
(s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00)) |
| 213 |
{
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| 214 |
SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR); |
| 215 |
ret = -1;
|
| 216 |
goto end;
|
| 217 |
} |
| 218 |
|
| 219 |
/* s->version=SSL3_VERSION; */
|
| 220 |
s->type=SSL_ST_CONNECT; |
| 221 |
|
| 222 |
if (s->init_buf == NULL) |
| 223 |
{
|
| 224 |
if ((buf=BUF_MEM_new()) == NULL) |
| 225 |
{
|
| 226 |
ret= -1;
|
| 227 |
goto end;
|
| 228 |
} |
| 229 |
if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
|
| 230 |
{
|
| 231 |
ret= -1;
|
| 232 |
goto end;
|
| 233 |
} |
| 234 |
s->init_buf=buf; |
| 235 |
buf=NULL;
|
| 236 |
} |
| 237 |
|
| 238 |
if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } |
| 239 |
|
| 240 |
/* setup buffing BIO */
|
| 241 |
if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } |
| 242 |
|
| 243 |
/* don't push the buffering BIO quite yet */
|
| 244 |
|
| 245 |
s->state=SSL3_ST_CW_CLNT_HELLO_A; |
| 246 |
s->ctx->stats.sess_connect++; |
| 247 |
s->init_num=0;
|
| 248 |
/* mark client_random uninitialized */
|
| 249 |
memset(s->s3->client_random,0,sizeof(s->s3->client_random)); |
| 250 |
s->d1->send_cookie = 0;
|
| 251 |
s->hit = 0;
|
| 252 |
break;
|
| 253 |
|
| 254 |
#ifndef OPENSSL_NO_SCTP
|
| 255 |
case DTLS1_SCTP_ST_CR_READ_SOCK:
|
| 256 |
|
| 257 |
if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
|
| 258 |
{
|
| 259 |
s->s3->in_read_app_data=2;
|
| 260 |
s->rwstate=SSL_READING; |
| 261 |
BIO_clear_retry_flags(SSL_get_rbio(s)); |
| 262 |
BIO_set_retry_read(SSL_get_rbio(s)); |
| 263 |
ret = -1;
|
| 264 |
goto end;
|
| 265 |
} |
| 266 |
|
| 267 |
s->state=s->s3->tmp.next_state; |
| 268 |
break;
|
| 269 |
|
| 270 |
case DTLS1_SCTP_ST_CW_WRITE_SOCK:
|
| 271 |
/* read app data until dry event */
|
| 272 |
|
| 273 |
ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s)); |
| 274 |
if (ret < 0) goto end; |
| 275 |
|
| 276 |
if (ret == 0) |
| 277 |
{
|
| 278 |
s->s3->in_read_app_data=2;
|
| 279 |
s->rwstate=SSL_READING; |
| 280 |
BIO_clear_retry_flags(SSL_get_rbio(s)); |
| 281 |
BIO_set_retry_read(SSL_get_rbio(s)); |
| 282 |
ret = -1;
|
| 283 |
goto end;
|
| 284 |
} |
| 285 |
|
| 286 |
s->state=s->d1->next_state; |
| 287 |
break;
|
| 288 |
#endif
|
| 289 |
|
| 290 |
case SSL3_ST_CW_CLNT_HELLO_A:
|
| 291 |
case SSL3_ST_CW_CLNT_HELLO_B:
|
| 292 |
|
| 293 |
s->shutdown=0;
|
| 294 |
|
| 295 |
/* every DTLS ClientHello resets Finished MAC */
|
| 296 |
ssl3_init_finished_mac(s); |
| 297 |
|
| 298 |
dtls1_start_timer(s); |
| 299 |
ret=dtls1_client_hello(s); |
| 300 |
if (ret <= 0) goto end; |
| 301 |
|
| 302 |
if ( s->d1->send_cookie)
|
| 303 |
{
|
| 304 |
s->state=SSL3_ST_CW_FLUSH; |
| 305 |
s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A; |
| 306 |
} |
| 307 |
else
|
| 308 |
s->state=SSL3_ST_CR_SRVR_HELLO_A; |
| 309 |
|
| 310 |
s->init_num=0;
|
| 311 |
|
| 312 |
#ifndef OPENSSL_NO_SCTP
|
| 313 |
/* Disable buffering for SCTP */
|
| 314 |
if (!BIO_dgram_is_sctp(SSL_get_wbio(s)))
|
| 315 |
{
|
| 316 |
#endif
|
| 317 |
/* turn on buffering for the next lot of output */
|
| 318 |
if (s->bbio != s->wbio)
|
| 319 |
s->wbio=BIO_push(s->bbio,s->wbio); |
| 320 |
#ifndef OPENSSL_NO_SCTP
|
| 321 |
} |
| 322 |
#endif
|
| 323 |
|
| 324 |
break;
|
| 325 |
|
| 326 |
case SSL3_ST_CR_SRVR_HELLO_A:
|
| 327 |
case SSL3_ST_CR_SRVR_HELLO_B:
|
| 328 |
ret=ssl3_get_server_hello(s); |
| 329 |
if (ret <= 0) goto end; |
| 330 |
else
|
| 331 |
{
|
| 332 |
if (s->hit)
|
| 333 |
{
|
| 334 |
#ifndef OPENSSL_NO_SCTP
|
| 335 |
/* Add new shared key for SCTP-Auth,
|
| 336 |
* will be ignored if no SCTP used.
|
| 337 |
*/
|
| 338 |
snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL), |
| 339 |
DTLS1_SCTP_AUTH_LABEL); |
| 340 |
|
| 341 |
SSL_export_keying_material(s, sctpauthkey, |
| 342 |
sizeof(sctpauthkey), labelbuffer,
|
| 343 |
sizeof(labelbuffer), NULL, 0, 0); |
| 344 |
|
| 345 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
| 346 |
sizeof(sctpauthkey), sctpauthkey);
|
| 347 |
#endif
|
| 348 |
|
| 349 |
s->state=SSL3_ST_CR_FINISHED_A; |
| 350 |
} |
| 351 |
else
|
| 352 |
s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A; |
| 353 |
} |
| 354 |
s->init_num=0;
|
| 355 |
break;
|
| 356 |
|
| 357 |
case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
|
| 358 |
case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
|
| 359 |
|
| 360 |
ret = dtls1_get_hello_verify(s); |
| 361 |
if ( ret <= 0) |
| 362 |
goto end;
|
| 363 |
dtls1_stop_timer(s); |
| 364 |
if ( s->d1->send_cookie) /* start again, with a cookie */ |
| 365 |
s->state=SSL3_ST_CW_CLNT_HELLO_A; |
| 366 |
else
|
| 367 |
s->state = SSL3_ST_CR_CERT_A; |
| 368 |
s->init_num = 0;
|
| 369 |
break;
|
| 370 |
|
| 371 |
case SSL3_ST_CR_CERT_A:
|
| 372 |
case SSL3_ST_CR_CERT_B:
|
| 373 |
#ifndef OPENSSL_NO_TLSEXT
|
| 374 |
ret=ssl3_check_finished(s); |
| 375 |
if (ret <= 0) goto end; |
| 376 |
if (ret == 2) |
| 377 |
{
|
| 378 |
s->hit = 1;
|
| 379 |
if (s->tlsext_ticket_expected)
|
| 380 |
s->state=SSL3_ST_CR_SESSION_TICKET_A; |
| 381 |
else
|
| 382 |
s->state=SSL3_ST_CR_FINISHED_A; |
| 383 |
s->init_num=0;
|
| 384 |
break;
|
| 385 |
} |
| 386 |
#endif
|
| 387 |
/* Check if it is anon DH or PSK */
|
| 388 |
if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
|
| 389 |
!(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) |
| 390 |
{
|
| 391 |
ret=ssl3_get_server_certificate(s); |
| 392 |
if (ret <= 0) goto end; |
| 393 |
#ifndef OPENSSL_NO_TLSEXT
|
| 394 |
if (s->tlsext_status_expected)
|
| 395 |
s->state=SSL3_ST_CR_CERT_STATUS_A; |
| 396 |
else
|
| 397 |
s->state=SSL3_ST_CR_KEY_EXCH_A; |
| 398 |
} |
| 399 |
else
|
| 400 |
{
|
| 401 |
skip = 1;
|
| 402 |
s->state=SSL3_ST_CR_KEY_EXCH_A; |
| 403 |
} |
| 404 |
#else
|
| 405 |
} |
| 406 |
else
|
| 407 |
skip=1;
|
| 408 |
|
| 409 |
s->state=SSL3_ST_CR_KEY_EXCH_A; |
| 410 |
#endif
|
| 411 |
s->init_num=0;
|
| 412 |
break;
|
| 413 |
|
| 414 |
case SSL3_ST_CR_KEY_EXCH_A:
|
| 415 |
case SSL3_ST_CR_KEY_EXCH_B:
|
| 416 |
ret=ssl3_get_key_exchange(s); |
| 417 |
if (ret <= 0) goto end; |
| 418 |
s->state=SSL3_ST_CR_CERT_REQ_A; |
| 419 |
s->init_num=0;
|
| 420 |
|
| 421 |
/* at this point we check that we have the
|
| 422 |
* required stuff from the server */
|
| 423 |
if (!ssl3_check_cert_and_algorithm(s))
|
| 424 |
{
|
| 425 |
ret= -1;
|
| 426 |
goto end;
|
| 427 |
} |
| 428 |
break;
|
| 429 |
|
| 430 |
case SSL3_ST_CR_CERT_REQ_A:
|
| 431 |
case SSL3_ST_CR_CERT_REQ_B:
|
| 432 |
ret=ssl3_get_certificate_request(s); |
| 433 |
if (ret <= 0) goto end; |
| 434 |
s->state=SSL3_ST_CR_SRVR_DONE_A; |
| 435 |
s->init_num=0;
|
| 436 |
break;
|
| 437 |
|
| 438 |
case SSL3_ST_CR_SRVR_DONE_A:
|
| 439 |
case SSL3_ST_CR_SRVR_DONE_B:
|
| 440 |
ret=ssl3_get_server_done(s); |
| 441 |
if (ret <= 0) goto end; |
| 442 |
dtls1_stop_timer(s); |
| 443 |
if (s->s3->tmp.cert_req)
|
| 444 |
s->s3->tmp.next_state=SSL3_ST_CW_CERT_A; |
| 445 |
else
|
| 446 |
s->s3->tmp.next_state=SSL3_ST_CW_KEY_EXCH_A; |
| 447 |
s->init_num=0;
|
| 448 |
|
| 449 |
#ifndef OPENSSL_NO_SCTP
|
| 450 |
if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
|
| 451 |
state == SSL_ST_RENEGOTIATE) |
| 452 |
s->state=DTLS1_SCTP_ST_CR_READ_SOCK; |
| 453 |
else
|
| 454 |
#endif
|
| 455 |
s->state=s->s3->tmp.next_state; |
| 456 |
break;
|
| 457 |
|
| 458 |
case SSL3_ST_CW_CERT_A:
|
| 459 |
case SSL3_ST_CW_CERT_B:
|
| 460 |
case SSL3_ST_CW_CERT_C:
|
| 461 |
case SSL3_ST_CW_CERT_D:
|
| 462 |
dtls1_start_timer(s); |
| 463 |
ret=dtls1_send_client_certificate(s); |
| 464 |
if (ret <= 0) goto end; |
| 465 |
s->state=SSL3_ST_CW_KEY_EXCH_A; |
| 466 |
s->init_num=0;
|
| 467 |
break;
|
| 468 |
|
| 469 |
case SSL3_ST_CW_KEY_EXCH_A:
|
| 470 |
case SSL3_ST_CW_KEY_EXCH_B:
|
| 471 |
dtls1_start_timer(s); |
| 472 |
ret=dtls1_send_client_key_exchange(s); |
| 473 |
if (ret <= 0) goto end; |
| 474 |
|
| 475 |
#ifndef OPENSSL_NO_SCTP
|
| 476 |
/* Add new shared key for SCTP-Auth,
|
| 477 |
* will be ignored if no SCTP used.
|
| 478 |
*/
|
| 479 |
snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL), |
| 480 |
DTLS1_SCTP_AUTH_LABEL); |
| 481 |
|
| 482 |
SSL_export_keying_material(s, sctpauthkey, |
| 483 |
sizeof(sctpauthkey), labelbuffer,
|
| 484 |
sizeof(labelbuffer), NULL, 0, 0); |
| 485 |
|
| 486 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
| 487 |
sizeof(sctpauthkey), sctpauthkey);
|
| 488 |
#endif
|
| 489 |
|
| 490 |
/* EAY EAY EAY need to check for DH fix cert
|
| 491 |
* sent back */
|
| 492 |
/* For TLS, cert_req is set to 2, so a cert chain
|
| 493 |
* of nothing is sent, but no verify packet is sent */
|
| 494 |
if (s->s3->tmp.cert_req == 1) |
| 495 |
{
|
| 496 |
s->state=SSL3_ST_CW_CERT_VRFY_A; |
| 497 |
} |
| 498 |
else
|
| 499 |
{
|
| 500 |
#ifndef OPENSSL_NO_SCTP
|
| 501 |
if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
|
| 502 |
{
|
| 503 |
s->d1->next_state=SSL3_ST_CW_CHANGE_A; |
| 504 |
s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK; |
| 505 |
} |
| 506 |
else
|
| 507 |
#endif
|
| 508 |
s->state=SSL3_ST_CW_CHANGE_A; |
| 509 |
s->s3->change_cipher_spec=0;
|
| 510 |
} |
| 511 |
|
| 512 |
s->init_num=0;
|
| 513 |
break;
|
| 514 |
|
| 515 |
case SSL3_ST_CW_CERT_VRFY_A:
|
| 516 |
case SSL3_ST_CW_CERT_VRFY_B:
|
| 517 |
dtls1_start_timer(s); |
| 518 |
ret=dtls1_send_client_verify(s); |
| 519 |
if (ret <= 0) goto end; |
| 520 |
#ifndef OPENSSL_NO_SCTP
|
| 521 |
if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
|
| 522 |
{
|
| 523 |
s->d1->next_state=SSL3_ST_CW_CHANGE_A; |
| 524 |
s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK; |
| 525 |
} |
| 526 |
else
|
| 527 |
#endif
|
| 528 |
s->state=SSL3_ST_CW_CHANGE_A; |
| 529 |
s->init_num=0;
|
| 530 |
s->s3->change_cipher_spec=0;
|
| 531 |
break;
|
| 532 |
|
| 533 |
case SSL3_ST_CW_CHANGE_A:
|
| 534 |
case SSL3_ST_CW_CHANGE_B:
|
| 535 |
if (!s->hit)
|
| 536 |
dtls1_start_timer(s); |
| 537 |
ret=dtls1_send_change_cipher_spec(s, |
| 538 |
SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); |
| 539 |
if (ret <= 0) goto end; |
| 540 |
|
| 541 |
s->state=SSL3_ST_CW_FINISHED_A; |
| 542 |
s->init_num=0;
|
| 543 |
|
| 544 |
s->session->cipher=s->s3->tmp.new_cipher; |
| 545 |
#ifdef OPENSSL_NO_COMP
|
| 546 |
s->session->compress_meth=0;
|
| 547 |
#else
|
| 548 |
if (s->s3->tmp.new_compression == NULL) |
| 549 |
s->session->compress_meth=0;
|
| 550 |
else
|
| 551 |
s->session->compress_meth= |
| 552 |
s->s3->tmp.new_compression->id; |
| 553 |
#endif
|
| 554 |
if (!s->method->ssl3_enc->setup_key_block(s))
|
| 555 |
{
|
| 556 |
ret= -1;
|
| 557 |
goto end;
|
| 558 |
} |
| 559 |
|
| 560 |
if (!s->method->ssl3_enc->change_cipher_state(s,
|
| 561 |
SSL3_CHANGE_CIPHER_CLIENT_WRITE)) |
| 562 |
{
|
| 563 |
ret= -1;
|
| 564 |
goto end;
|
| 565 |
} |
| 566 |
|
| 567 |
#ifndef OPENSSL_NO_SCTP
|
| 568 |
if (s->hit)
|
| 569 |
{
|
| 570 |
/* Change to new shared key of SCTP-Auth,
|
| 571 |
* will be ignored if no SCTP used.
|
| 572 |
*/
|
| 573 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL); |
| 574 |
} |
| 575 |
#endif
|
| 576 |
|
| 577 |
dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); |
| 578 |
break;
|
| 579 |
|
| 580 |
case SSL3_ST_CW_FINISHED_A:
|
| 581 |
case SSL3_ST_CW_FINISHED_B:
|
| 582 |
if (!s->hit)
|
| 583 |
dtls1_start_timer(s); |
| 584 |
ret=dtls1_send_finished(s, |
| 585 |
SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, |
| 586 |
s->method->ssl3_enc->client_finished_label, |
| 587 |
s->method->ssl3_enc->client_finished_label_len); |
| 588 |
if (ret <= 0) goto end; |
| 589 |
s->state=SSL3_ST_CW_FLUSH; |
| 590 |
|
| 591 |
/* clear flags */
|
| 592 |
s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; |
| 593 |
if (s->hit)
|
| 594 |
{
|
| 595 |
s->s3->tmp.next_state=SSL_ST_OK; |
| 596 |
#ifndef OPENSSL_NO_SCTP
|
| 597 |
if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
|
| 598 |
{
|
| 599 |
s->d1->next_state = s->s3->tmp.next_state; |
| 600 |
s->s3->tmp.next_state=DTLS1_SCTP_ST_CW_WRITE_SOCK; |
| 601 |
} |
| 602 |
#endif
|
| 603 |
if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
|
| 604 |
{
|
| 605 |
s->state=SSL_ST_OK; |
| 606 |
#ifndef OPENSSL_NO_SCTP
|
| 607 |
if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
|
| 608 |
{
|
| 609 |
s->d1->next_state = SSL_ST_OK; |
| 610 |
s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK; |
| 611 |
} |
| 612 |
#endif
|
| 613 |
s->s3->flags|=SSL3_FLAGS_POP_BUFFER; |
| 614 |
s->s3->delay_buf_pop_ret=0;
|
| 615 |
} |
| 616 |
} |
| 617 |
else
|
| 618 |
{
|
| 619 |
#ifndef OPENSSL_NO_SCTP
|
| 620 |
/* Change to new shared key of SCTP-Auth,
|
| 621 |
* will be ignored if no SCTP used.
|
| 622 |
*/
|
| 623 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL); |
| 624 |
#endif
|
| 625 |
|
| 626 |
#ifndef OPENSSL_NO_TLSEXT
|
| 627 |
/* Allow NewSessionTicket if ticket expected */
|
| 628 |
if (s->tlsext_ticket_expected)
|
| 629 |
s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; |
| 630 |
else
|
| 631 |
#endif
|
| 632 |
|
| 633 |
s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; |
| 634 |
} |
| 635 |
s->init_num=0;
|
| 636 |
break;
|
| 637 |
|
| 638 |
#ifndef OPENSSL_NO_TLSEXT
|
| 639 |
case SSL3_ST_CR_SESSION_TICKET_A:
|
| 640 |
case SSL3_ST_CR_SESSION_TICKET_B:
|
| 641 |
ret=ssl3_get_new_session_ticket(s); |
| 642 |
if (ret <= 0) goto end; |
| 643 |
s->state=SSL3_ST_CR_FINISHED_A; |
| 644 |
s->init_num=0;
|
| 645 |
break;
|
| 646 |
|
| 647 |
case SSL3_ST_CR_CERT_STATUS_A:
|
| 648 |
case SSL3_ST_CR_CERT_STATUS_B:
|
| 649 |
ret=ssl3_get_cert_status(s); |
| 650 |
if (ret <= 0) goto end; |
| 651 |
s->state=SSL3_ST_CR_KEY_EXCH_A; |
| 652 |
s->init_num=0;
|
| 653 |
break;
|
| 654 |
#endif
|
| 655 |
|
| 656 |
case SSL3_ST_CR_FINISHED_A:
|
| 657 |
case SSL3_ST_CR_FINISHED_B:
|
| 658 |
s->d1->change_cipher_spec_ok = 1;
|
| 659 |
ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, |
| 660 |
SSL3_ST_CR_FINISHED_B); |
| 661 |
if (ret <= 0) goto end; |
| 662 |
dtls1_stop_timer(s); |
| 663 |
|
| 664 |
if (s->hit)
|
| 665 |
s->state=SSL3_ST_CW_CHANGE_A; |
| 666 |
else
|
| 667 |
s->state=SSL_ST_OK; |
| 668 |
|
| 669 |
#ifndef OPENSSL_NO_SCTP
|
| 670 |
if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
|
| 671 |
state == SSL_ST_RENEGOTIATE) |
| 672 |
{
|
| 673 |
s->d1->next_state=s->state; |
| 674 |
s->state=DTLS1_SCTP_ST_CW_WRITE_SOCK; |
| 675 |
} |
| 676 |
#endif
|
| 677 |
|
| 678 |
s->init_num=0;
|
| 679 |
break;
|
| 680 |
|
| 681 |
case SSL3_ST_CW_FLUSH:
|
| 682 |
s->rwstate=SSL_WRITING; |
| 683 |
if (BIO_flush(s->wbio) <= 0) |
| 684 |
{
|
| 685 |
/* If the write error was fatal, stop trying */
|
| 686 |
if (!BIO_should_retry(s->wbio))
|
| 687 |
{
|
| 688 |
s->rwstate=SSL_NOTHING; |
| 689 |
s->state=s->s3->tmp.next_state; |
| 690 |
} |
| 691 |
|
| 692 |
ret= -1;
|
| 693 |
goto end;
|
| 694 |
} |
| 695 |
s->rwstate=SSL_NOTHING; |
| 696 |
s->state=s->s3->tmp.next_state; |
| 697 |
break;
|
| 698 |
|
| 699 |
case SSL_ST_OK:
|
| 700 |
/* clean a few things up */
|
| 701 |
ssl3_cleanup_key_block(s); |
| 702 |
|
| 703 |
#if 0
|
| 704 |
if (s->init_buf != NULL)
|
| 705 |
{
|
| 706 |
BUF_MEM_free(s->init_buf);
|
| 707 |
s->init_buf=NULL;
|
| 708 |
}
|
| 709 |
#endif
|
| 710 |
|
| 711 |
/* If we are not 'joining' the last two packets,
|
| 712 |
* remove the buffering now */
|
| 713 |
if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
|
| 714 |
ssl_free_wbio_buffer(s); |
| 715 |
/* else do it later in ssl3_write */
|
| 716 |
|
| 717 |
s->init_num=0;
|
| 718 |
s->renegotiate=0;
|
| 719 |
s->new_session=0;
|
| 720 |
|
| 721 |
ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); |
| 722 |
if (s->hit) s->ctx->stats.sess_hit++;
|
| 723 |
|
| 724 |
ret=1;
|
| 725 |
/* s->server=0; */
|
| 726 |
s->handshake_func=dtls1_connect; |
| 727 |
s->ctx->stats.sess_connect_good++; |
| 728 |
|
| 729 |
if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
| 730 |
|
| 731 |
/* done with handshaking */
|
| 732 |
s->d1->handshake_read_seq = 0;
|
| 733 |
s->d1->next_handshake_write_seq = 0;
|
| 734 |
goto end;
|
| 735 |
/* break; */
|
| 736 |
|
| 737 |
default:
|
| 738 |
SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE); |
| 739 |
ret= -1;
|
| 740 |
goto end;
|
| 741 |
/* break; */
|
| 742 |
} |
| 743 |
|
| 744 |
/* did we do anything */
|
| 745 |
if (!s->s3->tmp.reuse_message && !skip)
|
| 746 |
{
|
| 747 |
if (s->debug)
|
| 748 |
{
|
| 749 |
if ((ret=BIO_flush(s->wbio)) <= 0) |
| 750 |
goto end;
|
| 751 |
} |
| 752 |
|
| 753 |
if ((cb != NULL) && (s->state != state)) |
| 754 |
{
|
| 755 |
new_state=s->state; |
| 756 |
s->state=state; |
| 757 |
cb(s,SSL_CB_CONNECT_LOOP,1);
|
| 758 |
s->state=new_state; |
| 759 |
} |
| 760 |
} |
| 761 |
skip=0;
|
| 762 |
} |
| 763 |
end:
|
| 764 |
s->in_handshake--; |
| 765 |
|
| 766 |
#ifndef OPENSSL_NO_SCTP
|
| 767 |
/* Notify SCTP BIO socket to leave handshake
|
| 768 |
* mode and allow stream identifier other
|
| 769 |
* than 0. Will be ignored if no SCTP is used.
|
| 770 |
*/
|
| 771 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
|
| 772 |
#endif
|
| 773 |
|
| 774 |
if (buf != NULL) |
| 775 |
BUF_MEM_free(buf); |
| 776 |
if (cb != NULL) |
| 777 |
cb(s,SSL_CB_CONNECT_EXIT,ret); |
| 778 |
return(ret);
|
| 779 |
} |
| 780 |
|
| 781 |
int dtls1_client_hello(SSL *s)
|
| 782 |
{
|
| 783 |
unsigned char *buf; |
| 784 |
unsigned char *p,*d; |
| 785 |
unsigned int i,j; |
| 786 |
unsigned long l; |
| 787 |
SSL_COMP *comp; |
| 788 |
|
| 789 |
buf=(unsigned char *)s->init_buf->data; |
| 790 |
if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
|
| 791 |
{
|
| 792 |
SSL_SESSION *sess = s->session; |
| 793 |
if ((s->session == NULL) || |
| 794 |
(s->session->ssl_version != s->version) || |
| 795 |
#ifdef OPENSSL_NO_TLSEXT
|
| 796 |
!sess->session_id_length || |
| 797 |
#else
|
| 798 |
(!sess->session_id_length && !sess->tlsext_tick) || |
| 799 |
#endif
|
| 800 |
(s->session->not_resumable)) |
| 801 |
{
|
| 802 |
if (!ssl_get_new_session(s,0)) |
| 803 |
goto err;
|
| 804 |
} |
| 805 |
/* else use the pre-loaded session */
|
| 806 |
|
| 807 |
p=s->s3->client_random; |
| 808 |
|
| 809 |
/* if client_random is initialized, reuse it, we are
|
| 810 |
* required to use same upon reply to HelloVerify */
|
| 811 |
for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++) |
| 812 |
; |
| 813 |
if (i==sizeof(s->s3->client_random)) |
| 814 |
ssl_fill_hello_random(s, 0, p,
|
| 815 |
sizeof(s->s3->client_random));
|
| 816 |
|
| 817 |
/* Do the message type and length last */
|
| 818 |
d=p= &(buf[DTLS1_HM_HEADER_LENGTH]); |
| 819 |
|
| 820 |
*(p++)=s->version>>8;
|
| 821 |
*(p++)=s->version&0xff;
|
| 822 |
s->client_version=s->version; |
| 823 |
|
| 824 |
/* Random stuff */
|
| 825 |
memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); |
| 826 |
p+=SSL3_RANDOM_SIZE; |
| 827 |
|
| 828 |
/* Session ID */
|
| 829 |
if (s->new_session)
|
| 830 |
i=0;
|
| 831 |
else
|
| 832 |
i=s->session->session_id_length; |
| 833 |
*(p++)=i; |
| 834 |
if (i != 0) |
| 835 |
{
|
| 836 |
if (i > sizeof s->session->session_id) |
| 837 |
{
|
| 838 |
SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
| 839 |
goto err;
|
| 840 |
} |
| 841 |
memcpy(p,s->session->session_id,i); |
| 842 |
p+=i; |
| 843 |
} |
| 844 |
|
| 845 |
/* cookie stuff */
|
| 846 |
if ( s->d1->cookie_len > sizeof(s->d1->cookie)) |
| 847 |
{
|
| 848 |
SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
| 849 |
goto err;
|
| 850 |
} |
| 851 |
*(p++) = s->d1->cookie_len; |
| 852 |
memcpy(p, s->d1->cookie, s->d1->cookie_len); |
| 853 |
p += s->d1->cookie_len; |
| 854 |
|
| 855 |
/* Ciphers supported */
|
| 856 |
i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); |
| 857 |
if (i == 0) |
| 858 |
{
|
| 859 |
SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); |
| 860 |
goto err;
|
| 861 |
} |
| 862 |
s2n(i,p); |
| 863 |
p+=i; |
| 864 |
|
| 865 |
/* COMPRESSION */
|
| 866 |
if (s->ctx->comp_methods == NULL) |
| 867 |
j=0;
|
| 868 |
else
|
| 869 |
j=sk_SSL_COMP_num(s->ctx->comp_methods); |
| 870 |
*(p++)=1+j;
|
| 871 |
for (i=0; i<j; i++) |
| 872 |
{
|
| 873 |
comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); |
| 874 |
*(p++)=comp->id; |
| 875 |
} |
| 876 |
*(p++)=0; /* Add the NULL method */ |
| 877 |
|
| 878 |
#ifndef OPENSSL_NO_TLSEXT
|
| 879 |
/* TLS extensions*/
|
| 880 |
if (ssl_prepare_clienthello_tlsext(s) <= 0) |
| 881 |
{
|
| 882 |
SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); |
| 883 |
goto err;
|
| 884 |
} |
| 885 |
if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) |
| 886 |
{
|
| 887 |
SSLerr(SSL_F_DTLS1_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); |
| 888 |
goto err;
|
| 889 |
} |
| 890 |
#endif
|
| 891 |
|
| 892 |
l=(p-d); |
| 893 |
d=buf; |
| 894 |
|
| 895 |
d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
|
| 896 |
|
| 897 |
s->state=SSL3_ST_CW_CLNT_HELLO_B; |
| 898 |
/* number of bytes to write */
|
| 899 |
s->init_num=p-buf; |
| 900 |
s->init_off=0;
|
| 901 |
|
| 902 |
/* buffer the message to handle re-xmits */
|
| 903 |
dtls1_buffer_message(s, 0);
|
| 904 |
} |
| 905 |
|
| 906 |
/* SSL3_ST_CW_CLNT_HELLO_B */
|
| 907 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 908 |
err:
|
| 909 |
return(-1); |
| 910 |
} |
| 911 |
|
| 912 |
static int dtls1_get_hello_verify(SSL *s) |
| 913 |
{
|
| 914 |
int n, al, ok = 0; |
| 915 |
unsigned char *data; |
| 916 |
unsigned int cookie_len; |
| 917 |
|
| 918 |
n=s->method->ssl_get_message(s, |
| 919 |
DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A, |
| 920 |
DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B, |
| 921 |
-1,
|
| 922 |
s->max_cert_list, |
| 923 |
&ok); |
| 924 |
|
| 925 |
if (!ok) return((int)n); |
| 926 |
|
| 927 |
if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
|
| 928 |
{
|
| 929 |
s->d1->send_cookie = 0;
|
| 930 |
s->s3->tmp.reuse_message=1;
|
| 931 |
return(1); |
| 932 |
} |
| 933 |
|
| 934 |
data = (unsigned char *)s->init_msg; |
| 935 |
|
| 936 |
if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff))) |
| 937 |
{
|
| 938 |
SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION); |
| 939 |
s->version=(s->version&0xff00)|data[1]; |
| 940 |
al = SSL_AD_PROTOCOL_VERSION; |
| 941 |
goto f_err;
|
| 942 |
} |
| 943 |
data+=2;
|
| 944 |
|
| 945 |
cookie_len = *(data++); |
| 946 |
if ( cookie_len > sizeof(s->d1->cookie)) |
| 947 |
{
|
| 948 |
al=SSL_AD_ILLEGAL_PARAMETER; |
| 949 |
goto f_err;
|
| 950 |
} |
| 951 |
|
| 952 |
memcpy(s->d1->cookie, data, cookie_len); |
| 953 |
s->d1->cookie_len = cookie_len; |
| 954 |
|
| 955 |
s->d1->send_cookie = 1;
|
| 956 |
return 1; |
| 957 |
|
| 958 |
f_err:
|
| 959 |
ssl3_send_alert(s, SSL3_AL_FATAL, al); |
| 960 |
return -1; |
| 961 |
} |
| 962 |
|
| 963 |
int dtls1_send_client_key_exchange(SSL *s)
|
| 964 |
{
|
| 965 |
unsigned char *p,*d; |
| 966 |
int n;
|
| 967 |
unsigned long alg_k; |
| 968 |
#ifndef OPENSSL_NO_RSA
|
| 969 |
unsigned char *q; |
| 970 |
EVP_PKEY *pkey=NULL;
|
| 971 |
#endif
|
| 972 |
#ifndef OPENSSL_NO_KRB5
|
| 973 |
KSSL_ERR kssl_err; |
| 974 |
#endif /* OPENSSL_NO_KRB5 */ |
| 975 |
#ifndef OPENSSL_NO_ECDH
|
| 976 |
EC_KEY *clnt_ecdh = NULL;
|
| 977 |
const EC_POINT *srvr_ecpoint = NULL; |
| 978 |
EVP_PKEY *srvr_pub_pkey = NULL;
|
| 979 |
unsigned char *encodedPoint = NULL; |
| 980 |
int encoded_pt_len = 0; |
| 981 |
BN_CTX * bn_ctx = NULL;
|
| 982 |
#endif
|
| 983 |
|
| 984 |
if (s->state == SSL3_ST_CW_KEY_EXCH_A)
|
| 985 |
{
|
| 986 |
d=(unsigned char *)s->init_buf->data; |
| 987 |
p= &(d[DTLS1_HM_HEADER_LENGTH]); |
| 988 |
|
| 989 |
alg_k=s->s3->tmp.new_cipher->algorithm_mkey; |
| 990 |
|
| 991 |
/* Fool emacs indentation */
|
| 992 |
if (0) {} |
| 993 |
#ifndef OPENSSL_NO_RSA
|
| 994 |
else if (alg_k & SSL_kRSA) |
| 995 |
{
|
| 996 |
RSA *rsa; |
| 997 |
unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; |
| 998 |
|
| 999 |
if (s->session->sess_cert == NULL) |
| 1000 |
{
|
| 1001 |
/* We should always have a server certificate with SSL_kRSA. */
|
| 1002 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); |
| 1003 |
goto err;
|
| 1004 |
} |
| 1005 |
|
| 1006 |
if (s->session->sess_cert->peer_rsa_tmp != NULL) |
| 1007 |
rsa=s->session->sess_cert->peer_rsa_tmp; |
| 1008 |
else
|
| 1009 |
{
|
| 1010 |
pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); |
| 1011 |
if ((pkey == NULL) || |
| 1012 |
(pkey->type != EVP_PKEY_RSA) || |
| 1013 |
(pkey->pkey.rsa == NULL))
|
| 1014 |
{
|
| 1015 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); |
| 1016 |
goto err;
|
| 1017 |
} |
| 1018 |
rsa=pkey->pkey.rsa; |
| 1019 |
EVP_PKEY_free(pkey); |
| 1020 |
} |
| 1021 |
|
| 1022 |
tmp_buf[0]=s->client_version>>8; |
| 1023 |
tmp_buf[1]=s->client_version&0xff; |
| 1024 |
if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) |
| 1025 |
goto err;
|
| 1026 |
|
| 1027 |
s->session->master_key_length=sizeof tmp_buf;
|
| 1028 |
|
| 1029 |
q=p; |
| 1030 |
/* Fix buf for TLS and [incidentally] DTLS */
|
| 1031 |
if (s->version > SSL3_VERSION)
|
| 1032 |
p+=2;
|
| 1033 |
n=RSA_public_encrypt(sizeof tmp_buf,
|
| 1034 |
tmp_buf,p,rsa,RSA_PKCS1_PADDING); |
| 1035 |
#ifdef PKCS1_CHECK
|
| 1036 |
if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; |
| 1037 |
if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; |
| 1038 |
#endif
|
| 1039 |
if (n <= 0) |
| 1040 |
{
|
| 1041 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); |
| 1042 |
goto err;
|
| 1043 |
} |
| 1044 |
|
| 1045 |
/* Fix buf for TLS and [incidentally] DTLS */
|
| 1046 |
if (s->version > SSL3_VERSION)
|
| 1047 |
{
|
| 1048 |
s2n(n,q); |
| 1049 |
n+=2;
|
| 1050 |
} |
| 1051 |
|
| 1052 |
s->session->master_key_length= |
| 1053 |
s->method->ssl3_enc->generate_master_secret(s, |
| 1054 |
s->session->master_key, |
| 1055 |
tmp_buf,sizeof tmp_buf);
|
| 1056 |
OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
|
| 1057 |
} |
| 1058 |
#endif
|
| 1059 |
#ifndef OPENSSL_NO_KRB5
|
| 1060 |
else if (alg_k & SSL_kKRB5) |
| 1061 |
{
|
| 1062 |
krb5_error_code krb5rc; |
| 1063 |
KSSL_CTX *kssl_ctx = s->kssl_ctx; |
| 1064 |
/* krb5_data krb5_ap_req; */
|
| 1065 |
krb5_data *enc_ticket; |
| 1066 |
krb5_data authenticator, *authp = NULL;
|
| 1067 |
EVP_CIPHER_CTX ciph_ctx; |
| 1068 |
const EVP_CIPHER *enc = NULL; |
| 1069 |
unsigned char iv[EVP_MAX_IV_LENGTH]; |
| 1070 |
unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; |
| 1071 |
unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH |
| 1072 |
+ EVP_MAX_IV_LENGTH]; |
| 1073 |
int padl, outl = sizeof(epms); |
| 1074 |
|
| 1075 |
EVP_CIPHER_CTX_init(&ciph_ctx); |
| 1076 |
|
| 1077 |
#ifdef KSSL_DEBUG
|
| 1078 |
printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
|
| 1079 |
alg_k, SSL_kKRB5); |
| 1080 |
#endif /* KSSL_DEBUG */ |
| 1081 |
|
| 1082 |
authp = NULL;
|
| 1083 |
#ifdef KRB5SENDAUTH
|
| 1084 |
if (KRB5SENDAUTH) authp = &authenticator;
|
| 1085 |
#endif /* KRB5SENDAUTH */ |
| 1086 |
|
| 1087 |
krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, |
| 1088 |
&kssl_err); |
| 1089 |
enc = kssl_map_enc(kssl_ctx->enctype); |
| 1090 |
if (enc == NULL) |
| 1091 |
goto err;
|
| 1092 |
#ifdef KSSL_DEBUG
|
| 1093 |
{
|
| 1094 |
printf("kssl_cget_tkt rtn %d\n", krb5rc);
|
| 1095 |
if (krb5rc && kssl_err.text)
|
| 1096 |
printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
|
| 1097 |
} |
| 1098 |
#endif /* KSSL_DEBUG */ |
| 1099 |
|
| 1100 |
if (krb5rc)
|
| 1101 |
{
|
| 1102 |
ssl3_send_alert(s,SSL3_AL_FATAL, |
| 1103 |
SSL_AD_HANDSHAKE_FAILURE); |
| 1104 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1105 |
kssl_err.reason); |
| 1106 |
goto err;
|
| 1107 |
} |
| 1108 |
|
| 1109 |
/* 20010406 VRS - Earlier versions used KRB5 AP_REQ
|
| 1110 |
** in place of RFC 2712 KerberosWrapper, as in:
|
| 1111 |
**
|
| 1112 |
** Send ticket (copy to *p, set n = length)
|
| 1113 |
** n = krb5_ap_req.length;
|
| 1114 |
** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
|
| 1115 |
** if (krb5_ap_req.data)
|
| 1116 |
** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
|
| 1117 |
**
|
| 1118 |
** Now using real RFC 2712 KerberosWrapper
|
| 1119 |
** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
|
| 1120 |
** Note: 2712 "opaque" types are here replaced
|
| 1121 |
** with a 2-byte length followed by the value.
|
| 1122 |
** Example:
|
| 1123 |
** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
|
| 1124 |
** Where "xx xx" = length bytes. Shown here with
|
| 1125 |
** optional authenticator omitted.
|
| 1126 |
*/
|
| 1127 |
|
| 1128 |
/* KerberosWrapper.Ticket */
|
| 1129 |
s2n(enc_ticket->length,p); |
| 1130 |
memcpy(p, enc_ticket->data, enc_ticket->length); |
| 1131 |
p+= enc_ticket->length; |
| 1132 |
n = enc_ticket->length + 2;
|
| 1133 |
|
| 1134 |
/* KerberosWrapper.Authenticator */
|
| 1135 |
if (authp && authp->length)
|
| 1136 |
{
|
| 1137 |
s2n(authp->length,p); |
| 1138 |
memcpy(p, authp->data, authp->length); |
| 1139 |
p+= authp->length; |
| 1140 |
n+= authp->length + 2;
|
| 1141 |
|
| 1142 |
free(authp->data); |
| 1143 |
authp->data = NULL;
|
| 1144 |
authp->length = 0;
|
| 1145 |
} |
| 1146 |
else
|
| 1147 |
{
|
| 1148 |
s2n(0,p);/* null authenticator length */ |
| 1149 |
n+=2;
|
| 1150 |
} |
| 1151 |
|
| 1152 |
if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0) |
| 1153 |
goto err;
|
| 1154 |
|
| 1155 |
/* 20010420 VRS. Tried it this way; failed.
|
| 1156 |
** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
|
| 1157 |
** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
|
| 1158 |
** kssl_ctx->length);
|
| 1159 |
** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
|
| 1160 |
*/
|
| 1161 |
|
| 1162 |
memset(iv, 0, sizeof iv); /* per RFC 1510 */ |
| 1163 |
EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
|
| 1164 |
kssl_ctx->key,iv); |
| 1165 |
EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, |
| 1166 |
sizeof tmp_buf);
|
| 1167 |
EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); |
| 1168 |
outl += padl; |
| 1169 |
if (outl > (int)sizeof epms) |
| 1170 |
{
|
| 1171 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
| 1172 |
goto err;
|
| 1173 |
} |
| 1174 |
EVP_CIPHER_CTX_cleanup(&ciph_ctx); |
| 1175 |
|
| 1176 |
/* KerberosWrapper.EncryptedPreMasterSecret */
|
| 1177 |
s2n(outl,p); |
| 1178 |
memcpy(p, epms, outl); |
| 1179 |
p+=outl; |
| 1180 |
n+=outl + 2;
|
| 1181 |
|
| 1182 |
s->session->master_key_length= |
| 1183 |
s->method->ssl3_enc->generate_master_secret(s, |
| 1184 |
s->session->master_key, |
| 1185 |
tmp_buf, sizeof tmp_buf);
|
| 1186 |
|
| 1187 |
OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
|
| 1188 |
OPENSSL_cleanse(epms, outl); |
| 1189 |
} |
| 1190 |
#endif
|
| 1191 |
#ifndef OPENSSL_NO_DH
|
| 1192 |
else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) |
| 1193 |
{
|
| 1194 |
DH *dh_srvr,*dh_clnt; |
| 1195 |
|
| 1196 |
if (s->session->sess_cert == NULL) |
| 1197 |
{
|
| 1198 |
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); |
| 1199 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); |
| 1200 |
goto err;
|
| 1201 |
} |
| 1202 |
|
| 1203 |
if (s->session->sess_cert->peer_dh_tmp != NULL) |
| 1204 |
dh_srvr=s->session->sess_cert->peer_dh_tmp; |
| 1205 |
else
|
| 1206 |
{
|
| 1207 |
/* we get them from the cert */
|
| 1208 |
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); |
| 1209 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); |
| 1210 |
goto err;
|
| 1211 |
} |
| 1212 |
|
| 1213 |
/* generate a new random key */
|
| 1214 |
if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) |
| 1215 |
{
|
| 1216 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); |
| 1217 |
goto err;
|
| 1218 |
} |
| 1219 |
if (!DH_generate_key(dh_clnt))
|
| 1220 |
{
|
| 1221 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); |
| 1222 |
goto err;
|
| 1223 |
} |
| 1224 |
|
| 1225 |
/* use the 'p' output buffer for the DH key, but
|
| 1226 |
* make sure to clear it out afterwards */
|
| 1227 |
|
| 1228 |
n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); |
| 1229 |
|
| 1230 |
if (n <= 0) |
| 1231 |
{
|
| 1232 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); |
| 1233 |
goto err;
|
| 1234 |
} |
| 1235 |
|
| 1236 |
/* generate master key from the result */
|
| 1237 |
s->session->master_key_length= |
| 1238 |
s->method->ssl3_enc->generate_master_secret(s, |
| 1239 |
s->session->master_key,p,n); |
| 1240 |
/* clean up */
|
| 1241 |
memset(p,0,n);
|
| 1242 |
|
| 1243 |
/* send off the data */
|
| 1244 |
n=BN_num_bytes(dh_clnt->pub_key); |
| 1245 |
s2n(n,p); |
| 1246 |
BN_bn2bin(dh_clnt->pub_key,p); |
| 1247 |
n+=2;
|
| 1248 |
|
| 1249 |
DH_free(dh_clnt); |
| 1250 |
|
| 1251 |
/* perhaps clean things up a bit EAY EAY EAY EAY*/
|
| 1252 |
} |
| 1253 |
#endif
|
| 1254 |
#ifndef OPENSSL_NO_ECDH
|
| 1255 |
else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) |
| 1256 |
{
|
| 1257 |
const EC_GROUP *srvr_group = NULL; |
| 1258 |
EC_KEY *tkey; |
| 1259 |
int ecdh_clnt_cert = 0; |
| 1260 |
int field_size = 0; |
| 1261 |
|
| 1262 |
if (s->session->sess_cert == NULL) |
| 1263 |
{
|
| 1264 |
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); |
| 1265 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); |
| 1266 |
goto err;
|
| 1267 |
} |
| 1268 |
|
| 1269 |
/* Did we send out the client's
|
| 1270 |
* ECDH share for use in premaster
|
| 1271 |
* computation as part of client certificate?
|
| 1272 |
* If so, set ecdh_clnt_cert to 1.
|
| 1273 |
*/
|
| 1274 |
if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) |
| 1275 |
{
|
| 1276 |
/* XXX: For now, we do not support client
|
| 1277 |
* authentication using ECDH certificates.
|
| 1278 |
* To add such support, one needs to add
|
| 1279 |
* code that checks for appropriate
|
| 1280 |
* conditions and sets ecdh_clnt_cert to 1.
|
| 1281 |
* For example, the cert have an ECC
|
| 1282 |
* key on the same curve as the server's
|
| 1283 |
* and the key should be authorized for
|
| 1284 |
* key agreement.
|
| 1285 |
*
|
| 1286 |
* One also needs to add code in ssl3_connect
|
| 1287 |
* to skip sending the certificate verify
|
| 1288 |
* message.
|
| 1289 |
*
|
| 1290 |
* if ((s->cert->key->privatekey != NULL) &&
|
| 1291 |
* (s->cert->key->privatekey->type ==
|
| 1292 |
* EVP_PKEY_EC) && ...)
|
| 1293 |
* ecdh_clnt_cert = 1;
|
| 1294 |
*/
|
| 1295 |
} |
| 1296 |
|
| 1297 |
if (s->session->sess_cert->peer_ecdh_tmp != NULL) |
| 1298 |
{
|
| 1299 |
tkey = s->session->sess_cert->peer_ecdh_tmp; |
| 1300 |
} |
| 1301 |
else
|
| 1302 |
{
|
| 1303 |
/* Get the Server Public Key from Cert */
|
| 1304 |
srvr_pub_pkey = X509_get_pubkey(s->session-> \ |
| 1305 |
sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); |
| 1306 |
if ((srvr_pub_pkey == NULL) || |
| 1307 |
(srvr_pub_pkey->type != EVP_PKEY_EC) || |
| 1308 |
(srvr_pub_pkey->pkey.ec == NULL))
|
| 1309 |
{
|
| 1310 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1311 |
ERR_R_INTERNAL_ERROR); |
| 1312 |
goto err;
|
| 1313 |
} |
| 1314 |
|
| 1315 |
tkey = srvr_pub_pkey->pkey.ec; |
| 1316 |
} |
| 1317 |
|
| 1318 |
srvr_group = EC_KEY_get0_group(tkey); |
| 1319 |
srvr_ecpoint = EC_KEY_get0_public_key(tkey); |
| 1320 |
|
| 1321 |
if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) |
| 1322 |
{
|
| 1323 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1324 |
ERR_R_INTERNAL_ERROR); |
| 1325 |
goto err;
|
| 1326 |
} |
| 1327 |
|
| 1328 |
if ((clnt_ecdh=EC_KEY_new()) == NULL) |
| 1329 |
{
|
| 1330 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); |
| 1331 |
goto err;
|
| 1332 |
} |
| 1333 |
|
| 1334 |
if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
|
| 1335 |
{
|
| 1336 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); |
| 1337 |
goto err;
|
| 1338 |
} |
| 1339 |
if (ecdh_clnt_cert)
|
| 1340 |
{
|
| 1341 |
/* Reuse key info from our certificate
|
| 1342 |
* We only need our private key to perform
|
| 1343 |
* the ECDH computation.
|
| 1344 |
*/
|
| 1345 |
const BIGNUM *priv_key;
|
| 1346 |
tkey = s->cert->key->privatekey->pkey.ec; |
| 1347 |
priv_key = EC_KEY_get0_private_key(tkey); |
| 1348 |
if (priv_key == NULL) |
| 1349 |
{
|
| 1350 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); |
| 1351 |
goto err;
|
| 1352 |
} |
| 1353 |
if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
|
| 1354 |
{
|
| 1355 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); |
| 1356 |
goto err;
|
| 1357 |
} |
| 1358 |
} |
| 1359 |
else
|
| 1360 |
{
|
| 1361 |
/* Generate a new ECDH key pair */
|
| 1362 |
if (!(EC_KEY_generate_key(clnt_ecdh)))
|
| 1363 |
{
|
| 1364 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); |
| 1365 |
goto err;
|
| 1366 |
} |
| 1367 |
} |
| 1368 |
|
| 1369 |
/* use the 'p' output buffer for the ECDH key, but
|
| 1370 |
* make sure to clear it out afterwards
|
| 1371 |
*/
|
| 1372 |
|
| 1373 |
field_size = EC_GROUP_get_degree(srvr_group); |
| 1374 |
if (field_size <= 0) |
| 1375 |
{
|
| 1376 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1377 |
ERR_R_ECDH_LIB); |
| 1378 |
goto err;
|
| 1379 |
} |
| 1380 |
n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); |
| 1381 |
if (n <= 0) |
| 1382 |
{
|
| 1383 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1384 |
ERR_R_ECDH_LIB); |
| 1385 |
goto err;
|
| 1386 |
} |
| 1387 |
|
| 1388 |
/* generate master key from the result */
|
| 1389 |
s->session->master_key_length = s->method->ssl3_enc \ |
| 1390 |
-> generate_master_secret(s, |
| 1391 |
s->session->master_key, |
| 1392 |
p, n); |
| 1393 |
|
| 1394 |
memset(p, 0, n); /* clean up */ |
| 1395 |
|
| 1396 |
if (ecdh_clnt_cert)
|
| 1397 |
{
|
| 1398 |
/* Send empty client key exch message */
|
| 1399 |
n = 0;
|
| 1400 |
} |
| 1401 |
else
|
| 1402 |
{
|
| 1403 |
/* First check the size of encoding and
|
| 1404 |
* allocate memory accordingly.
|
| 1405 |
*/
|
| 1406 |
encoded_pt_len = |
| 1407 |
EC_POINT_point2oct(srvr_group, |
| 1408 |
EC_KEY_get0_public_key(clnt_ecdh), |
| 1409 |
POINT_CONVERSION_UNCOMPRESSED, |
| 1410 |
NULL, 0, NULL); |
| 1411 |
|
| 1412 |
encodedPoint = (unsigned char *) |
| 1413 |
OPENSSL_malloc(encoded_pt_len * |
| 1414 |
sizeof(unsigned char)); |
| 1415 |
bn_ctx = BN_CTX_new(); |
| 1416 |
if ((encodedPoint == NULL) || |
| 1417 |
(bn_ctx == NULL))
|
| 1418 |
{
|
| 1419 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); |
| 1420 |
goto err;
|
| 1421 |
} |
| 1422 |
|
| 1423 |
/* Encode the public key */
|
| 1424 |
n = EC_POINT_point2oct(srvr_group, |
| 1425 |
EC_KEY_get0_public_key(clnt_ecdh), |
| 1426 |
POINT_CONVERSION_UNCOMPRESSED, |
| 1427 |
encodedPoint, encoded_pt_len, bn_ctx); |
| 1428 |
|
| 1429 |
*p = n; /* length of encoded point */
|
| 1430 |
/* Encoded point will be copied here */
|
| 1431 |
p += 1;
|
| 1432 |
/* copy the point */
|
| 1433 |
memcpy((unsigned char *)p, encodedPoint, n); |
| 1434 |
/* increment n to account for length field */
|
| 1435 |
n += 1;
|
| 1436 |
} |
| 1437 |
|
| 1438 |
/* Free allocated memory */
|
| 1439 |
BN_CTX_free(bn_ctx); |
| 1440 |
if (encodedPoint != NULL) OPENSSL_free(encodedPoint); |
| 1441 |
if (clnt_ecdh != NULL) |
| 1442 |
EC_KEY_free(clnt_ecdh); |
| 1443 |
EVP_PKEY_free(srvr_pub_pkey); |
| 1444 |
} |
| 1445 |
#endif /* !OPENSSL_NO_ECDH */ |
| 1446 |
|
| 1447 |
#ifndef OPENSSL_NO_PSK
|
| 1448 |
else if (alg_k & SSL_kPSK) |
| 1449 |
{
|
| 1450 |
char identity[PSK_MAX_IDENTITY_LEN];
|
| 1451 |
unsigned char *t = NULL; |
| 1452 |
unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; |
| 1453 |
unsigned int pre_ms_len = 0, psk_len = 0; |
| 1454 |
int psk_err = 1; |
| 1455 |
|
| 1456 |
n = 0;
|
| 1457 |
if (s->psk_client_callback == NULL) |
| 1458 |
{
|
| 1459 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1460 |
SSL_R_PSK_NO_CLIENT_CB); |
| 1461 |
goto err;
|
| 1462 |
} |
| 1463 |
|
| 1464 |
psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, |
| 1465 |
identity, PSK_MAX_IDENTITY_LEN, |
| 1466 |
psk_or_pre_ms, sizeof(psk_or_pre_ms));
|
| 1467 |
if (psk_len > PSK_MAX_PSK_LEN)
|
| 1468 |
{
|
| 1469 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1470 |
ERR_R_INTERNAL_ERROR); |
| 1471 |
goto psk_err;
|
| 1472 |
} |
| 1473 |
else if (psk_len == 0) |
| 1474 |
{
|
| 1475 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1476 |
SSL_R_PSK_IDENTITY_NOT_FOUND); |
| 1477 |
goto psk_err;
|
| 1478 |
} |
| 1479 |
|
| 1480 |
/* create PSK pre_master_secret */
|
| 1481 |
pre_ms_len = 2+psk_len+2+psk_len; |
| 1482 |
t = psk_or_pre_ms; |
| 1483 |
memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
|
| 1484 |
s2n(psk_len, t); |
| 1485 |
memset(t, 0, psk_len);
|
| 1486 |
t+=psk_len; |
| 1487 |
s2n(psk_len, t); |
| 1488 |
|
| 1489 |
if (s->session->psk_identity_hint != NULL) |
| 1490 |
OPENSSL_free(s->session->psk_identity_hint); |
| 1491 |
s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); |
| 1492 |
if (s->ctx->psk_identity_hint != NULL && |
| 1493 |
s->session->psk_identity_hint == NULL)
|
| 1494 |
{
|
| 1495 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1496 |
ERR_R_MALLOC_FAILURE); |
| 1497 |
goto psk_err;
|
| 1498 |
} |
| 1499 |
|
| 1500 |
if (s->session->psk_identity != NULL) |
| 1501 |
OPENSSL_free(s->session->psk_identity); |
| 1502 |
s->session->psk_identity = BUF_strdup(identity); |
| 1503 |
if (s->session->psk_identity == NULL) |
| 1504 |
{
|
| 1505 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1506 |
ERR_R_MALLOC_FAILURE); |
| 1507 |
goto psk_err;
|
| 1508 |
} |
| 1509 |
|
| 1510 |
s->session->master_key_length = |
| 1511 |
s->method->ssl3_enc->generate_master_secret(s, |
| 1512 |
s->session->master_key, |
| 1513 |
psk_or_pre_ms, pre_ms_len); |
| 1514 |
n = strlen(identity); |
| 1515 |
s2n(n, p); |
| 1516 |
memcpy(p, identity, n); |
| 1517 |
n+=2;
|
| 1518 |
psk_err = 0;
|
| 1519 |
psk_err:
|
| 1520 |
OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); |
| 1521 |
OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
|
| 1522 |
if (psk_err != 0) |
| 1523 |
{
|
| 1524 |
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
| 1525 |
goto err;
|
| 1526 |
} |
| 1527 |
} |
| 1528 |
#endif
|
| 1529 |
else
|
| 1530 |
{
|
| 1531 |
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); |
| 1532 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); |
| 1533 |
goto err;
|
| 1534 |
} |
| 1535 |
|
| 1536 |
d = dtls1_set_message_header(s, d, |
| 1537 |
SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
|
| 1538 |
/*
|
| 1539 |
*(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
|
| 1540 |
l2n3(n,d);
|
| 1541 |
l2n(s->d1->handshake_write_seq,d);
|
| 1542 |
s->d1->handshake_write_seq++;
|
| 1543 |
*/
|
| 1544 |
|
| 1545 |
s->state=SSL3_ST_CW_KEY_EXCH_B; |
| 1546 |
/* number of bytes to write */
|
| 1547 |
s->init_num=n+DTLS1_HM_HEADER_LENGTH; |
| 1548 |
s->init_off=0;
|
| 1549 |
|
| 1550 |
/* buffer the message to handle re-xmits */
|
| 1551 |
dtls1_buffer_message(s, 0);
|
| 1552 |
} |
| 1553 |
|
| 1554 |
/* SSL3_ST_CW_KEY_EXCH_B */
|
| 1555 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 1556 |
err:
|
| 1557 |
#ifndef OPENSSL_NO_ECDH
|
| 1558 |
BN_CTX_free(bn_ctx); |
| 1559 |
if (encodedPoint != NULL) OPENSSL_free(encodedPoint); |
| 1560 |
if (clnt_ecdh != NULL) |
| 1561 |
EC_KEY_free(clnt_ecdh); |
| 1562 |
EVP_PKEY_free(srvr_pub_pkey); |
| 1563 |
#endif
|
| 1564 |
return(-1); |
| 1565 |
} |
| 1566 |
|
| 1567 |
int dtls1_send_client_verify(SSL *s)
|
| 1568 |
{
|
| 1569 |
unsigned char *p,*d; |
| 1570 |
unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; |
| 1571 |
EVP_PKEY *pkey; |
| 1572 |
#ifndef OPENSSL_NO_RSA
|
| 1573 |
unsigned u=0; |
| 1574 |
#endif
|
| 1575 |
unsigned long n; |
| 1576 |
#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
|
| 1577 |
int j;
|
| 1578 |
#endif
|
| 1579 |
|
| 1580 |
if (s->state == SSL3_ST_CW_CERT_VRFY_A)
|
| 1581 |
{
|
| 1582 |
d=(unsigned char *)s->init_buf->data; |
| 1583 |
p= &(d[DTLS1_HM_HEADER_LENGTH]); |
| 1584 |
pkey=s->cert->key->privatekey; |
| 1585 |
|
| 1586 |
s->method->ssl3_enc->cert_verify_mac(s, |
| 1587 |
NID_sha1, |
| 1588 |
&(data[MD5_DIGEST_LENGTH])); |
| 1589 |
|
| 1590 |
#ifndef OPENSSL_NO_RSA
|
| 1591 |
if (pkey->type == EVP_PKEY_RSA)
|
| 1592 |
{
|
| 1593 |
s->method->ssl3_enc->cert_verify_mac(s, |
| 1594 |
NID_md5, |
| 1595 |
&(data[0]));
|
| 1596 |
if (RSA_sign(NID_md5_sha1, data,
|
| 1597 |
MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, |
| 1598 |
&(p[2]), &u, pkey->pkey.rsa) <= 0 ) |
| 1599 |
{
|
| 1600 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); |
| 1601 |
goto err;
|
| 1602 |
} |
| 1603 |
s2n(u,p); |
| 1604 |
n=u+2;
|
| 1605 |
} |
| 1606 |
else
|
| 1607 |
#endif
|
| 1608 |
#ifndef OPENSSL_NO_DSA
|
| 1609 |
if (pkey->type == EVP_PKEY_DSA)
|
| 1610 |
{
|
| 1611 |
if (!DSA_sign(pkey->save_type,
|
| 1612 |
&(data[MD5_DIGEST_LENGTH]), |
| 1613 |
SHA_DIGEST_LENGTH,&(p[2]),
|
| 1614 |
(unsigned int *)&j,pkey->pkey.dsa)) |
| 1615 |
{
|
| 1616 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); |
| 1617 |
goto err;
|
| 1618 |
} |
| 1619 |
s2n(j,p); |
| 1620 |
n=j+2;
|
| 1621 |
} |
| 1622 |
else
|
| 1623 |
#endif
|
| 1624 |
#ifndef OPENSSL_NO_ECDSA
|
| 1625 |
if (pkey->type == EVP_PKEY_EC)
|
| 1626 |
{
|
| 1627 |
if (!ECDSA_sign(pkey->save_type,
|
| 1628 |
&(data[MD5_DIGEST_LENGTH]), |
| 1629 |
SHA_DIGEST_LENGTH,&(p[2]),
|
| 1630 |
(unsigned int *)&j,pkey->pkey.ec)) |
| 1631 |
{
|
| 1632 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY, |
| 1633 |
ERR_R_ECDSA_LIB); |
| 1634 |
goto err;
|
| 1635 |
} |
| 1636 |
s2n(j,p); |
| 1637 |
n=j+2;
|
| 1638 |
} |
| 1639 |
else
|
| 1640 |
#endif
|
| 1641 |
{
|
| 1642 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); |
| 1643 |
goto err;
|
| 1644 |
} |
| 1645 |
|
| 1646 |
d = dtls1_set_message_header(s, d, |
| 1647 |
SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ;
|
| 1648 |
|
| 1649 |
s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH;
|
| 1650 |
s->init_off=0;
|
| 1651 |
|
| 1652 |
/* buffer the message to handle re-xmits */
|
| 1653 |
dtls1_buffer_message(s, 0);
|
| 1654 |
|
| 1655 |
s->state = SSL3_ST_CW_CERT_VRFY_B; |
| 1656 |
} |
| 1657 |
|
| 1658 |
/* s->state = SSL3_ST_CW_CERT_VRFY_B */
|
| 1659 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 1660 |
err:
|
| 1661 |
return(-1); |
| 1662 |
} |
| 1663 |
|
| 1664 |
int dtls1_send_client_certificate(SSL *s)
|
| 1665 |
{
|
| 1666 |
X509 *x509=NULL;
|
| 1667 |
EVP_PKEY *pkey=NULL;
|
| 1668 |
int i;
|
| 1669 |
unsigned long l; |
| 1670 |
|
| 1671 |
if (s->state == SSL3_ST_CW_CERT_A)
|
| 1672 |
{
|
| 1673 |
if ((s->cert == NULL) || |
| 1674 |
(s->cert->key->x509 == NULL) ||
|
| 1675 |
(s->cert->key->privatekey == NULL))
|
| 1676 |
s->state=SSL3_ST_CW_CERT_B; |
| 1677 |
else
|
| 1678 |
s->state=SSL3_ST_CW_CERT_C; |
| 1679 |
} |
| 1680 |
|
| 1681 |
/* We need to get a client cert */
|
| 1682 |
if (s->state == SSL3_ST_CW_CERT_B)
|
| 1683 |
{
|
| 1684 |
/* If we get an error, we need to
|
| 1685 |
* ssl->rwstate=SSL_X509_LOOKUP; return(-1);
|
| 1686 |
* We then get retied later */
|
| 1687 |
i=0;
|
| 1688 |
i = ssl_do_client_cert_cb(s, &x509, &pkey); |
| 1689 |
if (i < 0) |
| 1690 |
{
|
| 1691 |
s->rwstate=SSL_X509_LOOKUP; |
| 1692 |
return(-1); |
| 1693 |
} |
| 1694 |
s->rwstate=SSL_NOTHING; |
| 1695 |
if ((i == 1) && (pkey != NULL) && (x509 != NULL)) |
| 1696 |
{
|
| 1697 |
s->state=SSL3_ST_CW_CERT_B; |
| 1698 |
if ( !SSL_use_certificate(s,x509) ||
|
| 1699 |
!SSL_use_PrivateKey(s,pkey)) |
| 1700 |
i=0;
|
| 1701 |
} |
| 1702 |
else if (i == 1) |
| 1703 |
{
|
| 1704 |
i=0;
|
| 1705 |
SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
| 1706 |
} |
| 1707 |
|
| 1708 |
if (x509 != NULL) X509_free(x509); |
| 1709 |
if (pkey != NULL) EVP_PKEY_free(pkey); |
| 1710 |
if (i == 0) |
| 1711 |
{
|
| 1712 |
if (s->version == SSL3_VERSION)
|
| 1713 |
{
|
| 1714 |
s->s3->tmp.cert_req=0;
|
| 1715 |
ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); |
| 1716 |
return(1); |
| 1717 |
} |
| 1718 |
else
|
| 1719 |
{
|
| 1720 |
s->s3->tmp.cert_req=2;
|
| 1721 |
} |
| 1722 |
} |
| 1723 |
|
| 1724 |
/* Ok, we have a cert */
|
| 1725 |
s->state=SSL3_ST_CW_CERT_C; |
| 1726 |
} |
| 1727 |
|
| 1728 |
if (s->state == SSL3_ST_CW_CERT_C)
|
| 1729 |
{
|
| 1730 |
s->state=SSL3_ST_CW_CERT_D; |
| 1731 |
l=dtls1_output_cert_chain(s, |
| 1732 |
(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); |
| 1733 |
s->init_num=(int)l;
|
| 1734 |
s->init_off=0;
|
| 1735 |
|
| 1736 |
/* set header called by dtls1_output_cert_chain() */
|
| 1737 |
|
| 1738 |
/* buffer the message to handle re-xmits */
|
| 1739 |
dtls1_buffer_message(s, 0);
|
| 1740 |
} |
| 1741 |
/* SSL3_ST_CW_CERT_D */
|
| 1742 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 1743 |
} |