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main_repo / deps / openssl / openssl / ssl / d1_srvr.c @ aa3b4b4d
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| 1 |
/* ssl/d1_srvr.c */
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|---|---|
| 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.
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| 5 |
*/
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| 6 |
/* ====================================================================
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| 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"
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| 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
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| 55 |
* (eay@cryptsoft.com). This product includes software written by Tim
|
| 56 |
* Hudson (tjh@cryptsoft.com).
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| 57 |
*
|
| 58 |
*/
|
| 59 |
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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| 60 |
* All rights reserved.
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| 61 |
*
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| 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 |
*
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| 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 |
#include <openssl/buffer.h> |
| 119 |
#include <openssl/rand.h> |
| 120 |
#include <openssl/objects.h> |
| 121 |
#include <openssl/evp.h> |
| 122 |
#include <openssl/x509.h> |
| 123 |
#include <openssl/md5.h> |
| 124 |
#include <openssl/bn.h> |
| 125 |
#ifndef OPENSSL_NO_DH
|
| 126 |
#include <openssl/dh.h> |
| 127 |
#endif
|
| 128 |
|
| 129 |
static const SSL_METHOD *dtls1_get_server_method(int ver); |
| 130 |
static int dtls1_send_hello_verify_request(SSL *s); |
| 131 |
|
| 132 |
static const SSL_METHOD *dtls1_get_server_method(int ver) |
| 133 |
{
|
| 134 |
if (ver == DTLS1_VERSION)
|
| 135 |
return(DTLSv1_server_method());
|
| 136 |
else
|
| 137 |
return(NULL); |
| 138 |
} |
| 139 |
|
| 140 |
IMPLEMENT_dtls1_meth_func(DTLSv1_server_method, |
| 141 |
dtls1_accept, |
| 142 |
ssl_undefined_function, |
| 143 |
dtls1_get_server_method) |
| 144 |
|
| 145 |
int dtls1_accept(SSL *s)
|
| 146 |
{
|
| 147 |
BUF_MEM *buf; |
| 148 |
unsigned long Time=(unsigned long)time(NULL); |
| 149 |
void (*cb)(const SSL *ssl,int type,int val)=NULL; |
| 150 |
unsigned long alg_k; |
| 151 |
int ret= -1; |
| 152 |
int new_state,state,skip=0; |
| 153 |
int listen;
|
| 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 |
listen = s->d1->listen; |
| 169 |
|
| 170 |
/* init things to blank */
|
| 171 |
s->in_handshake++; |
| 172 |
if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
|
| 173 |
|
| 174 |
s->d1->listen = listen; |
| 175 |
#ifndef OPENSSL_NO_SCTP
|
| 176 |
/* Notify SCTP BIO socket to enter handshake
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| 177 |
* mode and prevent stream identifier other
|
| 178 |
* than 0. Will be ignored if no SCTP is used.
|
| 179 |
*/
|
| 180 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
|
| 181 |
#endif
|
| 182 |
|
| 183 |
if (s->cert == NULL) |
| 184 |
{
|
| 185 |
SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_NO_CERTIFICATE_SET); |
| 186 |
return(-1); |
| 187 |
} |
| 188 |
|
| 189 |
#ifndef OPENSSL_NO_HEARTBEATS
|
| 190 |
/* If we're awaiting a HeartbeatResponse, pretend we
|
| 191 |
* already got and don't await it anymore, because
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| 192 |
* Heartbeats don't make sense during handshakes anyway.
|
| 193 |
*/
|
| 194 |
if (s->tlsext_hb_pending)
|
| 195 |
{
|
| 196 |
dtls1_stop_timer(s); |
| 197 |
s->tlsext_hb_pending = 0;
|
| 198 |
s->tlsext_hb_seq++; |
| 199 |
} |
| 200 |
#endif
|
| 201 |
|
| 202 |
for (;;)
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| 203 |
{
|
| 204 |
state=s->state; |
| 205 |
|
| 206 |
switch (s->state)
|
| 207 |
{
|
| 208 |
case SSL_ST_RENEGOTIATE:
|
| 209 |
s->renegotiate=1;
|
| 210 |
/* s->state=SSL_ST_ACCEPT; */
|
| 211 |
|
| 212 |
case SSL_ST_BEFORE:
|
| 213 |
case SSL_ST_ACCEPT:
|
| 214 |
case SSL_ST_BEFORE|SSL_ST_ACCEPT:
|
| 215 |
case SSL_ST_OK|SSL_ST_ACCEPT:
|
| 216 |
|
| 217 |
s->server=1;
|
| 218 |
if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
| 219 |
|
| 220 |
if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00)) |
| 221 |
{
|
| 222 |
SSLerr(SSL_F_DTLS1_ACCEPT, ERR_R_INTERNAL_ERROR); |
| 223 |
return -1; |
| 224 |
} |
| 225 |
s->type=SSL_ST_ACCEPT; |
| 226 |
|
| 227 |
if (s->init_buf == NULL) |
| 228 |
{
|
| 229 |
if ((buf=BUF_MEM_new()) == NULL) |
| 230 |
{
|
| 231 |
ret= -1;
|
| 232 |
goto end;
|
| 233 |
} |
| 234 |
if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
|
| 235 |
{
|
| 236 |
ret= -1;
|
| 237 |
goto end;
|
| 238 |
} |
| 239 |
s->init_buf=buf; |
| 240 |
} |
| 241 |
|
| 242 |
if (!ssl3_setup_buffers(s))
|
| 243 |
{
|
| 244 |
ret= -1;
|
| 245 |
goto end;
|
| 246 |
} |
| 247 |
|
| 248 |
s->init_num=0;
|
| 249 |
|
| 250 |
if (s->state != SSL_ST_RENEGOTIATE)
|
| 251 |
{
|
| 252 |
/* Ok, we now need to push on a buffering BIO so that
|
| 253 |
* the output is sent in a way that TCP likes :-)
|
| 254 |
* ...but not with SCTP :-)
|
| 255 |
*/
|
| 256 |
#ifndef OPENSSL_NO_SCTP
|
| 257 |
if (!BIO_dgram_is_sctp(SSL_get_wbio(s)))
|
| 258 |
#endif
|
| 259 |
if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } |
| 260 |
|
| 261 |
ssl3_init_finished_mac(s); |
| 262 |
s->state=SSL3_ST_SR_CLNT_HELLO_A; |
| 263 |
s->ctx->stats.sess_accept++; |
| 264 |
} |
| 265 |
else
|
| 266 |
{
|
| 267 |
/* s->state == SSL_ST_RENEGOTIATE,
|
| 268 |
* we will just send a HelloRequest */
|
| 269 |
s->ctx->stats.sess_accept_renegotiate++; |
| 270 |
s->state=SSL3_ST_SW_HELLO_REQ_A; |
| 271 |
} |
| 272 |
|
| 273 |
break;
|
| 274 |
|
| 275 |
case SSL3_ST_SW_HELLO_REQ_A:
|
| 276 |
case SSL3_ST_SW_HELLO_REQ_B:
|
| 277 |
|
| 278 |
s->shutdown=0;
|
| 279 |
dtls1_clear_record_buffer(s); |
| 280 |
dtls1_start_timer(s); |
| 281 |
ret=dtls1_send_hello_request(s); |
| 282 |
if (ret <= 0) goto end; |
| 283 |
s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A; |
| 284 |
s->state=SSL3_ST_SW_FLUSH; |
| 285 |
s->init_num=0;
|
| 286 |
|
| 287 |
ssl3_init_finished_mac(s); |
| 288 |
break;
|
| 289 |
|
| 290 |
case SSL3_ST_SW_HELLO_REQ_C:
|
| 291 |
s->state=SSL_ST_OK; |
| 292 |
break;
|
| 293 |
|
| 294 |
case SSL3_ST_SR_CLNT_HELLO_A:
|
| 295 |
case SSL3_ST_SR_CLNT_HELLO_B:
|
| 296 |
case SSL3_ST_SR_CLNT_HELLO_C:
|
| 297 |
|
| 298 |
s->shutdown=0;
|
| 299 |
ret=ssl3_get_client_hello(s); |
| 300 |
if (ret <= 0) goto end; |
| 301 |
dtls1_stop_timer(s); |
| 302 |
|
| 303 |
if (ret == 1 && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)) |
| 304 |
s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A; |
| 305 |
else
|
| 306 |
s->state = SSL3_ST_SW_SRVR_HELLO_A; |
| 307 |
|
| 308 |
s->init_num=0;
|
| 309 |
|
| 310 |
/* Reflect ClientHello sequence to remain stateless while listening */
|
| 311 |
if (listen)
|
| 312 |
{
|
| 313 |
memcpy(s->s3->write_sequence, s->s3->read_sequence, sizeof(s->s3->write_sequence));
|
| 314 |
} |
| 315 |
|
| 316 |
/* If we're just listening, stop here */
|
| 317 |
if (listen && s->state == SSL3_ST_SW_SRVR_HELLO_A)
|
| 318 |
{
|
| 319 |
ret = 2;
|
| 320 |
s->d1->listen = 0;
|
| 321 |
/* Set expected sequence numbers
|
| 322 |
* to continue the handshake.
|
| 323 |
*/
|
| 324 |
s->d1->handshake_read_seq = 2;
|
| 325 |
s->d1->handshake_write_seq = 1;
|
| 326 |
s->d1->next_handshake_write_seq = 1;
|
| 327 |
goto end;
|
| 328 |
} |
| 329 |
|
| 330 |
break;
|
| 331 |
|
| 332 |
case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A:
|
| 333 |
case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B:
|
| 334 |
|
| 335 |
ret = dtls1_send_hello_verify_request(s); |
| 336 |
if ( ret <= 0) goto end; |
| 337 |
s->state=SSL3_ST_SW_FLUSH; |
| 338 |
s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A; |
| 339 |
|
| 340 |
/* HelloVerifyRequest resets Finished MAC */
|
| 341 |
if (s->version != DTLS1_BAD_VER)
|
| 342 |
ssl3_init_finished_mac(s); |
| 343 |
break;
|
| 344 |
|
| 345 |
#ifndef OPENSSL_NO_SCTP
|
| 346 |
case DTLS1_SCTP_ST_SR_READ_SOCK:
|
| 347 |
|
| 348 |
if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
|
| 349 |
{
|
| 350 |
s->s3->in_read_app_data=2;
|
| 351 |
s->rwstate=SSL_READING; |
| 352 |
BIO_clear_retry_flags(SSL_get_rbio(s)); |
| 353 |
BIO_set_retry_read(SSL_get_rbio(s)); |
| 354 |
ret = -1;
|
| 355 |
goto end;
|
| 356 |
} |
| 357 |
|
| 358 |
s->state=SSL3_ST_SR_FINISHED_A; |
| 359 |
break;
|
| 360 |
|
| 361 |
case DTLS1_SCTP_ST_SW_WRITE_SOCK:
|
| 362 |
ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s)); |
| 363 |
if (ret < 0) goto end; |
| 364 |
|
| 365 |
if (ret == 0) |
| 366 |
{
|
| 367 |
if (s->d1->next_state != SSL_ST_OK)
|
| 368 |
{
|
| 369 |
s->s3->in_read_app_data=2;
|
| 370 |
s->rwstate=SSL_READING; |
| 371 |
BIO_clear_retry_flags(SSL_get_rbio(s)); |
| 372 |
BIO_set_retry_read(SSL_get_rbio(s)); |
| 373 |
ret = -1;
|
| 374 |
goto end;
|
| 375 |
} |
| 376 |
} |
| 377 |
|
| 378 |
s->state=s->d1->next_state; |
| 379 |
break;
|
| 380 |
#endif
|
| 381 |
|
| 382 |
case SSL3_ST_SW_SRVR_HELLO_A:
|
| 383 |
case SSL3_ST_SW_SRVR_HELLO_B:
|
| 384 |
s->renegotiate = 2;
|
| 385 |
dtls1_start_timer(s); |
| 386 |
ret=dtls1_send_server_hello(s); |
| 387 |
if (ret <= 0) goto end; |
| 388 |
|
| 389 |
if (s->hit)
|
| 390 |
{
|
| 391 |
#ifndef OPENSSL_NO_SCTP
|
| 392 |
/* Add new shared key for SCTP-Auth,
|
| 393 |
* will be ignored if no SCTP used.
|
| 394 |
*/
|
| 395 |
snprintf((char*) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL), |
| 396 |
DTLS1_SCTP_AUTH_LABEL); |
| 397 |
|
| 398 |
SSL_export_keying_material(s, sctpauthkey, |
| 399 |
sizeof(sctpauthkey), labelbuffer,
|
| 400 |
sizeof(labelbuffer), NULL, 0, 0); |
| 401 |
|
| 402 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
| 403 |
sizeof(sctpauthkey), sctpauthkey);
|
| 404 |
#endif
|
| 405 |
#ifndef OPENSSL_NO_TLSEXT
|
| 406 |
if (s->tlsext_ticket_expected)
|
| 407 |
s->state=SSL3_ST_SW_SESSION_TICKET_A; |
| 408 |
else
|
| 409 |
s->state=SSL3_ST_SW_CHANGE_A; |
| 410 |
#else
|
| 411 |
s->state=SSL3_ST_SW_CHANGE_A; |
| 412 |
#endif
|
| 413 |
} |
| 414 |
else
|
| 415 |
s->state=SSL3_ST_SW_CERT_A; |
| 416 |
s->init_num=0;
|
| 417 |
break;
|
| 418 |
|
| 419 |
case SSL3_ST_SW_CERT_A:
|
| 420 |
case SSL3_ST_SW_CERT_B:
|
| 421 |
/* Check if it is anon DH or normal PSK */
|
| 422 |
if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
|
| 423 |
&& !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) |
| 424 |
{
|
| 425 |
dtls1_start_timer(s); |
| 426 |
ret=dtls1_send_server_certificate(s); |
| 427 |
if (ret <= 0) goto end; |
| 428 |
#ifndef OPENSSL_NO_TLSEXT
|
| 429 |
if (s->tlsext_status_expected)
|
| 430 |
s->state=SSL3_ST_SW_CERT_STATUS_A; |
| 431 |
else
|
| 432 |
s->state=SSL3_ST_SW_KEY_EXCH_A; |
| 433 |
} |
| 434 |
else
|
| 435 |
{
|
| 436 |
skip = 1;
|
| 437 |
s->state=SSL3_ST_SW_KEY_EXCH_A; |
| 438 |
} |
| 439 |
#else
|
| 440 |
} |
| 441 |
else
|
| 442 |
skip=1;
|
| 443 |
|
| 444 |
s->state=SSL3_ST_SW_KEY_EXCH_A; |
| 445 |
#endif
|
| 446 |
s->init_num=0;
|
| 447 |
break;
|
| 448 |
|
| 449 |
case SSL3_ST_SW_KEY_EXCH_A:
|
| 450 |
case SSL3_ST_SW_KEY_EXCH_B:
|
| 451 |
alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
| 452 |
|
| 453 |
/* clear this, it may get reset by
|
| 454 |
* send_server_key_exchange */
|
| 455 |
if ((s->options & SSL_OP_EPHEMERAL_RSA)
|
| 456 |
#ifndef OPENSSL_NO_KRB5
|
| 457 |
&& !(alg_k & SSL_kKRB5) |
| 458 |
#endif /* OPENSSL_NO_KRB5 */ |
| 459 |
) |
| 460 |
/* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
|
| 461 |
* even when forbidden by protocol specs
|
| 462 |
* (handshake may fail as clients are not required to
|
| 463 |
* be able to handle this) */
|
| 464 |
s->s3->tmp.use_rsa_tmp=1;
|
| 465 |
else
|
| 466 |
s->s3->tmp.use_rsa_tmp=0;
|
| 467 |
|
| 468 |
/* only send if a DH key exchange or
|
| 469 |
* RSA but we have a sign only certificate */
|
| 470 |
if (s->s3->tmp.use_rsa_tmp
|
| 471 |
/* PSK: send ServerKeyExchange if PSK identity
|
| 472 |
* hint if provided */
|
| 473 |
#ifndef OPENSSL_NO_PSK
|
| 474 |
|| ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint) |
| 475 |
#endif
|
| 476 |
|| (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) |
| 477 |
|| (alg_k & SSL_kEECDH) |
| 478 |
|| ((alg_k & SSL_kRSA) |
| 479 |
&& (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
|
| 480 |
|| (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) |
| 481 |
&& EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
|
| 482 |
) |
| 483 |
) |
| 484 |
) |
| 485 |
) |
| 486 |
{
|
| 487 |
dtls1_start_timer(s); |
| 488 |
ret=dtls1_send_server_key_exchange(s); |
| 489 |
if (ret <= 0) goto end; |
| 490 |
} |
| 491 |
else
|
| 492 |
skip=1;
|
| 493 |
|
| 494 |
s->state=SSL3_ST_SW_CERT_REQ_A; |
| 495 |
s->init_num=0;
|
| 496 |
break;
|
| 497 |
|
| 498 |
case SSL3_ST_SW_CERT_REQ_A:
|
| 499 |
case SSL3_ST_SW_CERT_REQ_B:
|
| 500 |
if (/* don't request cert unless asked for it: */ |
| 501 |
!(s->verify_mode & SSL_VERIFY_PEER) || |
| 502 |
/* if SSL_VERIFY_CLIENT_ONCE is set,
|
| 503 |
* don't request cert during re-negotiation: */
|
| 504 |
((s->session->peer != NULL) &&
|
| 505 |
(s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || |
| 506 |
/* never request cert in anonymous ciphersuites
|
| 507 |
* (see section "Certificate request" in SSL 3 drafts
|
| 508 |
* and in RFC 2246): */
|
| 509 |
((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && |
| 510 |
/* ... except when the application insists on verification
|
| 511 |
* (against the specs, but s3_clnt.c accepts this for SSL 3) */
|
| 512 |
!(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || |
| 513 |
/* never request cert in Kerberos ciphersuites */
|
| 514 |
(s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) |
| 515 |
/* With normal PSK Certificates and
|
| 516 |
* Certificate Requests are omitted */
|
| 517 |
|| (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) |
| 518 |
{
|
| 519 |
/* no cert request */
|
| 520 |
skip=1;
|
| 521 |
s->s3->tmp.cert_request=0;
|
| 522 |
s->state=SSL3_ST_SW_SRVR_DONE_A; |
| 523 |
#ifndef OPENSSL_NO_SCTP
|
| 524 |
if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
|
| 525 |
{
|
| 526 |
s->d1->next_state = SSL3_ST_SW_SRVR_DONE_A; |
| 527 |
s->state = DTLS1_SCTP_ST_SW_WRITE_SOCK; |
| 528 |
} |
| 529 |
#endif
|
| 530 |
} |
| 531 |
else
|
| 532 |
{
|
| 533 |
s->s3->tmp.cert_request=1;
|
| 534 |
dtls1_start_timer(s); |
| 535 |
ret=dtls1_send_certificate_request(s); |
| 536 |
if (ret <= 0) goto end; |
| 537 |
#ifndef NETSCAPE_HANG_BUG
|
| 538 |
s->state=SSL3_ST_SW_SRVR_DONE_A; |
| 539 |
#ifndef OPENSSL_NO_SCTP
|
| 540 |
if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
|
| 541 |
{
|
| 542 |
s->d1->next_state = SSL3_ST_SW_SRVR_DONE_A; |
| 543 |
s->state = DTLS1_SCTP_ST_SW_WRITE_SOCK; |
| 544 |
} |
| 545 |
#endif
|
| 546 |
#else
|
| 547 |
s->state=SSL3_ST_SW_FLUSH; |
| 548 |
s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; |
| 549 |
#ifndef OPENSSL_NO_SCTP
|
| 550 |
if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
|
| 551 |
{
|
| 552 |
s->d1->next_state = s->s3->tmp.next_state; |
| 553 |
s->s3->tmp.next_state=DTLS1_SCTP_ST_SW_WRITE_SOCK; |
| 554 |
} |
| 555 |
#endif
|
| 556 |
#endif
|
| 557 |
s->init_num=0;
|
| 558 |
} |
| 559 |
break;
|
| 560 |
|
| 561 |
case SSL3_ST_SW_SRVR_DONE_A:
|
| 562 |
case SSL3_ST_SW_SRVR_DONE_B:
|
| 563 |
dtls1_start_timer(s); |
| 564 |
ret=dtls1_send_server_done(s); |
| 565 |
if (ret <= 0) goto end; |
| 566 |
s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; |
| 567 |
s->state=SSL3_ST_SW_FLUSH; |
| 568 |
s->init_num=0;
|
| 569 |
break;
|
| 570 |
|
| 571 |
case SSL3_ST_SW_FLUSH:
|
| 572 |
s->rwstate=SSL_WRITING; |
| 573 |
if (BIO_flush(s->wbio) <= 0) |
| 574 |
{
|
| 575 |
/* If the write error was fatal, stop trying */
|
| 576 |
if (!BIO_should_retry(s->wbio))
|
| 577 |
{
|
| 578 |
s->rwstate=SSL_NOTHING; |
| 579 |
s->state=s->s3->tmp.next_state; |
| 580 |
} |
| 581 |
|
| 582 |
ret= -1;
|
| 583 |
goto end;
|
| 584 |
} |
| 585 |
s->rwstate=SSL_NOTHING; |
| 586 |
s->state=s->s3->tmp.next_state; |
| 587 |
break;
|
| 588 |
|
| 589 |
case SSL3_ST_SR_CERT_A:
|
| 590 |
case SSL3_ST_SR_CERT_B:
|
| 591 |
/* Check for second client hello (MS SGC) */
|
| 592 |
ret = ssl3_check_client_hello(s); |
| 593 |
if (ret <= 0) |
| 594 |
goto end;
|
| 595 |
if (ret == 2) |
| 596 |
{
|
| 597 |
dtls1_stop_timer(s); |
| 598 |
s->state = SSL3_ST_SR_CLNT_HELLO_C; |
| 599 |
} |
| 600 |
else {
|
| 601 |
if (s->s3->tmp.cert_request)
|
| 602 |
{
|
| 603 |
ret=ssl3_get_client_certificate(s); |
| 604 |
if (ret <= 0) goto end; |
| 605 |
} |
| 606 |
s->init_num=0;
|
| 607 |
s->state=SSL3_ST_SR_KEY_EXCH_A; |
| 608 |
} |
| 609 |
break;
|
| 610 |
|
| 611 |
case SSL3_ST_SR_KEY_EXCH_A:
|
| 612 |
case SSL3_ST_SR_KEY_EXCH_B:
|
| 613 |
ret=ssl3_get_client_key_exchange(s); |
| 614 |
if (ret <= 0) goto end; |
| 615 |
#ifndef OPENSSL_NO_SCTP
|
| 616 |
/* Add new shared key for SCTP-Auth,
|
| 617 |
* will be ignored if no SCTP used.
|
| 618 |
*/
|
| 619 |
snprintf((char *) labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL), |
| 620 |
DTLS1_SCTP_AUTH_LABEL); |
| 621 |
|
| 622 |
SSL_export_keying_material(s, sctpauthkey, |
| 623 |
sizeof(sctpauthkey), labelbuffer,
|
| 624 |
sizeof(labelbuffer), NULL, 0, 0); |
| 625 |
|
| 626 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, |
| 627 |
sizeof(sctpauthkey), sctpauthkey);
|
| 628 |
#endif
|
| 629 |
|
| 630 |
s->state=SSL3_ST_SR_CERT_VRFY_A; |
| 631 |
s->init_num=0;
|
| 632 |
|
| 633 |
if (ret == 2) |
| 634 |
{
|
| 635 |
/* For the ECDH ciphersuites when
|
| 636 |
* the client sends its ECDH pub key in
|
| 637 |
* a certificate, the CertificateVerify
|
| 638 |
* message is not sent.
|
| 639 |
*/
|
| 640 |
s->state=SSL3_ST_SR_FINISHED_A; |
| 641 |
s->init_num = 0;
|
| 642 |
} |
| 643 |
else
|
| 644 |
{
|
| 645 |
s->state=SSL3_ST_SR_CERT_VRFY_A; |
| 646 |
s->init_num=0;
|
| 647 |
|
| 648 |
/* We need to get hashes here so if there is
|
| 649 |
* a client cert, it can be verified */
|
| 650 |
s->method->ssl3_enc->cert_verify_mac(s, |
| 651 |
NID_md5, |
| 652 |
&(s->s3->tmp.cert_verify_md[0]));
|
| 653 |
s->method->ssl3_enc->cert_verify_mac(s, |
| 654 |
NID_sha1, |
| 655 |
&(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH])); |
| 656 |
} |
| 657 |
break;
|
| 658 |
|
| 659 |
case SSL3_ST_SR_CERT_VRFY_A:
|
| 660 |
case SSL3_ST_SR_CERT_VRFY_B:
|
| 661 |
|
| 662 |
s->d1->change_cipher_spec_ok = 1;
|
| 663 |
/* we should decide if we expected this one */
|
| 664 |
ret=ssl3_get_cert_verify(s); |
| 665 |
if (ret <= 0) goto end; |
| 666 |
#ifndef OPENSSL_NO_SCTP
|
| 667 |
if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
|
| 668 |
state == SSL_ST_RENEGOTIATE) |
| 669 |
s->state=DTLS1_SCTP_ST_SR_READ_SOCK; |
| 670 |
else
|
| 671 |
#endif
|
| 672 |
s->state=SSL3_ST_SR_FINISHED_A; |
| 673 |
s->init_num=0;
|
| 674 |
break;
|
| 675 |
|
| 676 |
case SSL3_ST_SR_FINISHED_A:
|
| 677 |
case SSL3_ST_SR_FINISHED_B:
|
| 678 |
s->d1->change_cipher_spec_ok = 1;
|
| 679 |
ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, |
| 680 |
SSL3_ST_SR_FINISHED_B); |
| 681 |
if (ret <= 0) goto end; |
| 682 |
dtls1_stop_timer(s); |
| 683 |
if (s->hit)
|
| 684 |
s->state=SSL_ST_OK; |
| 685 |
#ifndef OPENSSL_NO_TLSEXT
|
| 686 |
else if (s->tlsext_ticket_expected) |
| 687 |
s->state=SSL3_ST_SW_SESSION_TICKET_A; |
| 688 |
#endif
|
| 689 |
else
|
| 690 |
s->state=SSL3_ST_SW_CHANGE_A; |
| 691 |
s->init_num=0;
|
| 692 |
break;
|
| 693 |
|
| 694 |
#ifndef OPENSSL_NO_TLSEXT
|
| 695 |
case SSL3_ST_SW_SESSION_TICKET_A:
|
| 696 |
case SSL3_ST_SW_SESSION_TICKET_B:
|
| 697 |
ret=dtls1_send_newsession_ticket(s); |
| 698 |
if (ret <= 0) goto end; |
| 699 |
s->state=SSL3_ST_SW_CHANGE_A; |
| 700 |
s->init_num=0;
|
| 701 |
break;
|
| 702 |
|
| 703 |
case SSL3_ST_SW_CERT_STATUS_A:
|
| 704 |
case SSL3_ST_SW_CERT_STATUS_B:
|
| 705 |
ret=ssl3_send_cert_status(s); |
| 706 |
if (ret <= 0) goto end; |
| 707 |
s->state=SSL3_ST_SW_KEY_EXCH_A; |
| 708 |
s->init_num=0;
|
| 709 |
break;
|
| 710 |
|
| 711 |
#endif
|
| 712 |
|
| 713 |
case SSL3_ST_SW_CHANGE_A:
|
| 714 |
case SSL3_ST_SW_CHANGE_B:
|
| 715 |
|
| 716 |
s->session->cipher=s->s3->tmp.new_cipher; |
| 717 |
if (!s->method->ssl3_enc->setup_key_block(s))
|
| 718 |
{ ret= -1; goto end; }
|
| 719 |
|
| 720 |
ret=dtls1_send_change_cipher_spec(s, |
| 721 |
SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); |
| 722 |
|
| 723 |
if (ret <= 0) goto end; |
| 724 |
|
| 725 |
#ifndef OPENSSL_NO_SCTP
|
| 726 |
if (!s->hit)
|
| 727 |
{
|
| 728 |
/* Change to new shared key of SCTP-Auth,
|
| 729 |
* will be ignored if no SCTP used.
|
| 730 |
*/
|
| 731 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL); |
| 732 |
} |
| 733 |
#endif
|
| 734 |
|
| 735 |
s->state=SSL3_ST_SW_FINISHED_A; |
| 736 |
s->init_num=0;
|
| 737 |
|
| 738 |
if (!s->method->ssl3_enc->change_cipher_state(s,
|
| 739 |
SSL3_CHANGE_CIPHER_SERVER_WRITE)) |
| 740 |
{
|
| 741 |
ret= -1;
|
| 742 |
goto end;
|
| 743 |
} |
| 744 |
|
| 745 |
dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); |
| 746 |
break;
|
| 747 |
|
| 748 |
case SSL3_ST_SW_FINISHED_A:
|
| 749 |
case SSL3_ST_SW_FINISHED_B:
|
| 750 |
ret=dtls1_send_finished(s, |
| 751 |
SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, |
| 752 |
s->method->ssl3_enc->server_finished_label, |
| 753 |
s->method->ssl3_enc->server_finished_label_len); |
| 754 |
if (ret <= 0) goto end; |
| 755 |
s->state=SSL3_ST_SW_FLUSH; |
| 756 |
if (s->hit)
|
| 757 |
{
|
| 758 |
s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; |
| 759 |
|
| 760 |
#ifndef OPENSSL_NO_SCTP
|
| 761 |
/* Change to new shared key of SCTP-Auth,
|
| 762 |
* will be ignored if no SCTP used.
|
| 763 |
*/
|
| 764 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, 0, NULL); |
| 765 |
#endif
|
| 766 |
} |
| 767 |
else
|
| 768 |
{
|
| 769 |
s->s3->tmp.next_state=SSL_ST_OK; |
| 770 |
#ifndef OPENSSL_NO_SCTP
|
| 771 |
if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
|
| 772 |
{
|
| 773 |
s->d1->next_state = s->s3->tmp.next_state; |
| 774 |
s->s3->tmp.next_state=DTLS1_SCTP_ST_SW_WRITE_SOCK; |
| 775 |
} |
| 776 |
#endif
|
| 777 |
} |
| 778 |
s->init_num=0;
|
| 779 |
break;
|
| 780 |
|
| 781 |
case SSL_ST_OK:
|
| 782 |
/* clean a few things up */
|
| 783 |
ssl3_cleanup_key_block(s); |
| 784 |
|
| 785 |
#if 0
|
| 786 |
BUF_MEM_free(s->init_buf);
|
| 787 |
s->init_buf=NULL;
|
| 788 |
#endif
|
| 789 |
|
| 790 |
/* remove buffering on output */
|
| 791 |
ssl_free_wbio_buffer(s); |
| 792 |
|
| 793 |
s->init_num=0;
|
| 794 |
|
| 795 |
if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */ |
| 796 |
{
|
| 797 |
s->renegotiate=0;
|
| 798 |
s->new_session=0;
|
| 799 |
|
| 800 |
ssl_update_cache(s,SSL_SESS_CACHE_SERVER); |
| 801 |
|
| 802 |
s->ctx->stats.sess_accept_good++; |
| 803 |
/* s->server=1; */
|
| 804 |
s->handshake_func=dtls1_accept; |
| 805 |
|
| 806 |
if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
| 807 |
} |
| 808 |
|
| 809 |
ret = 1;
|
| 810 |
|
| 811 |
/* done handshaking, next message is client hello */
|
| 812 |
s->d1->handshake_read_seq = 0;
|
| 813 |
/* next message is server hello */
|
| 814 |
s->d1->handshake_write_seq = 0;
|
| 815 |
s->d1->next_handshake_write_seq = 0;
|
| 816 |
goto end;
|
| 817 |
/* break; */
|
| 818 |
|
| 819 |
default:
|
| 820 |
SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_UNKNOWN_STATE); |
| 821 |
ret= -1;
|
| 822 |
goto end;
|
| 823 |
/* break; */
|
| 824 |
} |
| 825 |
|
| 826 |
if (!s->s3->tmp.reuse_message && !skip)
|
| 827 |
{
|
| 828 |
if (s->debug)
|
| 829 |
{
|
| 830 |
if ((ret=BIO_flush(s->wbio)) <= 0) |
| 831 |
goto end;
|
| 832 |
} |
| 833 |
|
| 834 |
|
| 835 |
if ((cb != NULL) && (s->state != state)) |
| 836 |
{
|
| 837 |
new_state=s->state; |
| 838 |
s->state=state; |
| 839 |
cb(s,SSL_CB_ACCEPT_LOOP,1);
|
| 840 |
s->state=new_state; |
| 841 |
} |
| 842 |
} |
| 843 |
skip=0;
|
| 844 |
} |
| 845 |
end:
|
| 846 |
/* BIO_flush(s->wbio); */
|
| 847 |
|
| 848 |
s->in_handshake--; |
| 849 |
#ifndef OPENSSL_NO_SCTP
|
| 850 |
/* Notify SCTP BIO socket to leave handshake
|
| 851 |
* mode and prevent stream identifier other
|
| 852 |
* than 0. Will be ignored if no SCTP is used.
|
| 853 |
*/
|
| 854 |
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE, s->in_handshake, NULL);
|
| 855 |
#endif
|
| 856 |
|
| 857 |
if (cb != NULL) |
| 858 |
cb(s,SSL_CB_ACCEPT_EXIT,ret); |
| 859 |
return(ret);
|
| 860 |
} |
| 861 |
|
| 862 |
int dtls1_send_hello_request(SSL *s)
|
| 863 |
{
|
| 864 |
unsigned char *p; |
| 865 |
|
| 866 |
if (s->state == SSL3_ST_SW_HELLO_REQ_A)
|
| 867 |
{
|
| 868 |
p=(unsigned char *)s->init_buf->data; |
| 869 |
p = dtls1_set_message_header(s, p, SSL3_MT_HELLO_REQUEST, 0, 0, 0); |
| 870 |
|
| 871 |
s->state=SSL3_ST_SW_HELLO_REQ_B; |
| 872 |
/* number of bytes to write */
|
| 873 |
s->init_num=DTLS1_HM_HEADER_LENGTH; |
| 874 |
s->init_off=0;
|
| 875 |
|
| 876 |
/* no need to buffer this message, since there are no retransmit
|
| 877 |
* requests for it */
|
| 878 |
} |
| 879 |
|
| 880 |
/* SSL3_ST_SW_HELLO_REQ_B */
|
| 881 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 882 |
} |
| 883 |
|
| 884 |
int dtls1_send_hello_verify_request(SSL *s)
|
| 885 |
{
|
| 886 |
unsigned int msg_len; |
| 887 |
unsigned char *msg, *buf, *p; |
| 888 |
|
| 889 |
if (s->state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A)
|
| 890 |
{
|
| 891 |
buf = (unsigned char *)s->init_buf->data; |
| 892 |
|
| 893 |
msg = p = &(buf[DTLS1_HM_HEADER_LENGTH]); |
| 894 |
*(p++) = s->version >> 8;
|
| 895 |
*(p++) = s->version & 0xFF;
|
| 896 |
|
| 897 |
if (s->ctx->app_gen_cookie_cb == NULL || |
| 898 |
s->ctx->app_gen_cookie_cb(s, s->d1->cookie, |
| 899 |
&(s->d1->cookie_len)) == 0)
|
| 900 |
{
|
| 901 |
SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,ERR_R_INTERNAL_ERROR); |
| 902 |
return 0; |
| 903 |
} |
| 904 |
|
| 905 |
*(p++) = (unsigned char) s->d1->cookie_len; |
| 906 |
memcpy(p, s->d1->cookie, s->d1->cookie_len); |
| 907 |
p += s->d1->cookie_len; |
| 908 |
msg_len = p - msg; |
| 909 |
|
| 910 |
dtls1_set_message_header(s, buf, |
| 911 |
DTLS1_MT_HELLO_VERIFY_REQUEST, msg_len, 0, msg_len);
|
| 912 |
|
| 913 |
s->state=DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B; |
| 914 |
/* number of bytes to write */
|
| 915 |
s->init_num=p-buf; |
| 916 |
s->init_off=0;
|
| 917 |
} |
| 918 |
|
| 919 |
/* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */
|
| 920 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 921 |
} |
| 922 |
|
| 923 |
int dtls1_send_server_hello(SSL *s)
|
| 924 |
{
|
| 925 |
unsigned char *buf; |
| 926 |
unsigned char *p,*d; |
| 927 |
int i;
|
| 928 |
unsigned int sl; |
| 929 |
unsigned long l; |
| 930 |
|
| 931 |
if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
|
| 932 |
{
|
| 933 |
buf=(unsigned char *)s->init_buf->data; |
| 934 |
p=s->s3->server_random; |
| 935 |
ssl_fill_hello_random(s, 1, p, SSL3_RANDOM_SIZE);
|
| 936 |
/* Do the message type and length last */
|
| 937 |
d=p= &(buf[DTLS1_HM_HEADER_LENGTH]); |
| 938 |
|
| 939 |
*(p++)=s->version>>8;
|
| 940 |
*(p++)=s->version&0xff;
|
| 941 |
|
| 942 |
/* Random stuff */
|
| 943 |
memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); |
| 944 |
p+=SSL3_RANDOM_SIZE; |
| 945 |
|
| 946 |
/* now in theory we have 3 options to sending back the
|
| 947 |
* session id. If it is a re-use, we send back the
|
| 948 |
* old session-id, if it is a new session, we send
|
| 949 |
* back the new session-id or we send back a 0 length
|
| 950 |
* session-id if we want it to be single use.
|
| 951 |
* Currently I will not implement the '0' length session-id
|
| 952 |
* 12-Jan-98 - I'll now support the '0' length stuff.
|
| 953 |
*/
|
| 954 |
if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
|
| 955 |
s->session->session_id_length=0;
|
| 956 |
|
| 957 |
sl=s->session->session_id_length; |
| 958 |
if (sl > sizeof s->session->session_id) |
| 959 |
{
|
| 960 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
| 961 |
return -1; |
| 962 |
} |
| 963 |
*(p++)=sl; |
| 964 |
memcpy(p,s->session->session_id,sl); |
| 965 |
p+=sl; |
| 966 |
|
| 967 |
/* put the cipher */
|
| 968 |
if (s->s3->tmp.new_cipher == NULL) |
| 969 |
return -1; |
| 970 |
i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); |
| 971 |
p+=i; |
| 972 |
|
| 973 |
/* put the compression method */
|
| 974 |
#ifdef OPENSSL_NO_COMP
|
| 975 |
*(p++)=0;
|
| 976 |
#else
|
| 977 |
if (s->s3->tmp.new_compression == NULL) |
| 978 |
*(p++)=0;
|
| 979 |
else
|
| 980 |
*(p++)=s->s3->tmp.new_compression->id; |
| 981 |
#endif
|
| 982 |
|
| 983 |
#ifndef OPENSSL_NO_TLSEXT
|
| 984 |
if (ssl_prepare_serverhello_tlsext(s) <= 0) |
| 985 |
{
|
| 986 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); |
| 987 |
return -1; |
| 988 |
} |
| 989 |
if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) |
| 990 |
{
|
| 991 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR); |
| 992 |
return -1; |
| 993 |
} |
| 994 |
#endif
|
| 995 |
|
| 996 |
/* do the header */
|
| 997 |
l=(p-d); |
| 998 |
d=buf; |
| 999 |
|
| 1000 |
d = dtls1_set_message_header(s, d, SSL3_MT_SERVER_HELLO, l, 0, l);
|
| 1001 |
|
| 1002 |
s->state=SSL3_ST_SW_SRVR_HELLO_B; |
| 1003 |
/* number of bytes to write */
|
| 1004 |
s->init_num=p-buf; |
| 1005 |
s->init_off=0;
|
| 1006 |
|
| 1007 |
/* buffer the message to handle re-xmits */
|
| 1008 |
dtls1_buffer_message(s, 0);
|
| 1009 |
} |
| 1010 |
|
| 1011 |
/* SSL3_ST_SW_SRVR_HELLO_B */
|
| 1012 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 1013 |
} |
| 1014 |
|
| 1015 |
int dtls1_send_server_done(SSL *s)
|
| 1016 |
{
|
| 1017 |
unsigned char *p; |
| 1018 |
|
| 1019 |
if (s->state == SSL3_ST_SW_SRVR_DONE_A)
|
| 1020 |
{
|
| 1021 |
p=(unsigned char *)s->init_buf->data; |
| 1022 |
|
| 1023 |
/* do the header */
|
| 1024 |
p = dtls1_set_message_header(s, p, SSL3_MT_SERVER_DONE, 0, 0, 0); |
| 1025 |
|
| 1026 |
s->state=SSL3_ST_SW_SRVR_DONE_B; |
| 1027 |
/* number of bytes to write */
|
| 1028 |
s->init_num=DTLS1_HM_HEADER_LENGTH; |
| 1029 |
s->init_off=0;
|
| 1030 |
|
| 1031 |
/* buffer the message to handle re-xmits */
|
| 1032 |
dtls1_buffer_message(s, 0);
|
| 1033 |
} |
| 1034 |
|
| 1035 |
/* SSL3_ST_SW_SRVR_DONE_B */
|
| 1036 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 1037 |
} |
| 1038 |
|
| 1039 |
int dtls1_send_server_key_exchange(SSL *s)
|
| 1040 |
{
|
| 1041 |
#ifndef OPENSSL_NO_RSA
|
| 1042 |
unsigned char *q; |
| 1043 |
int j,num;
|
| 1044 |
RSA *rsa; |
| 1045 |
unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; |
| 1046 |
unsigned int u; |
| 1047 |
#endif
|
| 1048 |
#ifndef OPENSSL_NO_DH
|
| 1049 |
DH *dh=NULL,*dhp;
|
| 1050 |
#endif
|
| 1051 |
#ifndef OPENSSL_NO_ECDH
|
| 1052 |
EC_KEY *ecdh=NULL, *ecdhp;
|
| 1053 |
unsigned char *encodedPoint = NULL; |
| 1054 |
int encodedlen = 0; |
| 1055 |
int curve_id = 0; |
| 1056 |
BN_CTX *bn_ctx = NULL;
|
| 1057 |
#endif
|
| 1058 |
EVP_PKEY *pkey; |
| 1059 |
unsigned char *p,*d; |
| 1060 |
int al,i;
|
| 1061 |
unsigned long type; |
| 1062 |
int n;
|
| 1063 |
CERT *cert; |
| 1064 |
BIGNUM *r[4];
|
| 1065 |
int nr[4],kn; |
| 1066 |
BUF_MEM *buf; |
| 1067 |
EVP_MD_CTX md_ctx; |
| 1068 |
|
| 1069 |
EVP_MD_CTX_init(&md_ctx); |
| 1070 |
if (s->state == SSL3_ST_SW_KEY_EXCH_A)
|
| 1071 |
{
|
| 1072 |
type=s->s3->tmp.new_cipher->algorithm_mkey; |
| 1073 |
cert=s->cert; |
| 1074 |
|
| 1075 |
buf=s->init_buf; |
| 1076 |
|
| 1077 |
r[0]=r[1]=r[2]=r[3]=NULL; |
| 1078 |
n=0;
|
| 1079 |
#ifndef OPENSSL_NO_RSA
|
| 1080 |
if (type & SSL_kRSA)
|
| 1081 |
{
|
| 1082 |
rsa=cert->rsa_tmp; |
| 1083 |
if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) |
| 1084 |
{
|
| 1085 |
rsa=s->cert->rsa_tmp_cb(s, |
| 1086 |
SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
| 1087 |
SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
| 1088 |
if(rsa == NULL) |
| 1089 |
{
|
| 1090 |
al=SSL_AD_HANDSHAKE_FAILURE; |
| 1091 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); |
| 1092 |
goto f_err;
|
| 1093 |
} |
| 1094 |
RSA_up_ref(rsa); |
| 1095 |
cert->rsa_tmp=rsa; |
| 1096 |
} |
| 1097 |
if (rsa == NULL) |
| 1098 |
{
|
| 1099 |
al=SSL_AD_HANDSHAKE_FAILURE; |
| 1100 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
| 1101 |
goto f_err;
|
| 1102 |
} |
| 1103 |
r[0]=rsa->n;
|
| 1104 |
r[1]=rsa->e;
|
| 1105 |
s->s3->tmp.use_rsa_tmp=1;
|
| 1106 |
} |
| 1107 |
else
|
| 1108 |
#endif
|
| 1109 |
#ifndef OPENSSL_NO_DH
|
| 1110 |
if (type & SSL_kEDH)
|
| 1111 |
{
|
| 1112 |
dhp=cert->dh_tmp; |
| 1113 |
if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) |
| 1114 |
dhp=s->cert->dh_tmp_cb(s, |
| 1115 |
SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
| 1116 |
SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
| 1117 |
if (dhp == NULL) |
| 1118 |
{
|
| 1119 |
al=SSL_AD_HANDSHAKE_FAILURE; |
| 1120 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
| 1121 |
goto f_err;
|
| 1122 |
} |
| 1123 |
|
| 1124 |
if (s->s3->tmp.dh != NULL) |
| 1125 |
{
|
| 1126 |
DH_free(dh); |
| 1127 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
| 1128 |
goto err;
|
| 1129 |
} |
| 1130 |
|
| 1131 |
if ((dh=DHparams_dup(dhp)) == NULL) |
| 1132 |
{
|
| 1133 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); |
| 1134 |
goto err;
|
| 1135 |
} |
| 1136 |
|
| 1137 |
s->s3->tmp.dh=dh; |
| 1138 |
if ((dhp->pub_key == NULL || |
| 1139 |
dhp->priv_key == NULL ||
|
| 1140 |
(s->options & SSL_OP_SINGLE_DH_USE))) |
| 1141 |
{
|
| 1142 |
if(!DH_generate_key(dh))
|
| 1143 |
{
|
| 1144 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, |
| 1145 |
ERR_R_DH_LIB); |
| 1146 |
goto err;
|
| 1147 |
} |
| 1148 |
} |
| 1149 |
else
|
| 1150 |
{
|
| 1151 |
dh->pub_key=BN_dup(dhp->pub_key); |
| 1152 |
dh->priv_key=BN_dup(dhp->priv_key); |
| 1153 |
if ((dh->pub_key == NULL) || |
| 1154 |
(dh->priv_key == NULL))
|
| 1155 |
{
|
| 1156 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); |
| 1157 |
goto err;
|
| 1158 |
} |
| 1159 |
} |
| 1160 |
r[0]=dh->p;
|
| 1161 |
r[1]=dh->g;
|
| 1162 |
r[2]=dh->pub_key;
|
| 1163 |
} |
| 1164 |
else
|
| 1165 |
#endif
|
| 1166 |
#ifndef OPENSSL_NO_ECDH
|
| 1167 |
if (type & SSL_kEECDH)
|
| 1168 |
{
|
| 1169 |
const EC_GROUP *group;
|
| 1170 |
|
| 1171 |
ecdhp=cert->ecdh_tmp; |
| 1172 |
if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL)) |
| 1173 |
{
|
| 1174 |
ecdhp=s->cert->ecdh_tmp_cb(s, |
| 1175 |
SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
| 1176 |
SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
| 1177 |
} |
| 1178 |
if (ecdhp == NULL) |
| 1179 |
{
|
| 1180 |
al=SSL_AD_HANDSHAKE_FAILURE; |
| 1181 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); |
| 1182 |
goto f_err;
|
| 1183 |
} |
| 1184 |
|
| 1185 |
if (s->s3->tmp.ecdh != NULL) |
| 1186 |
{
|
| 1187 |
EC_KEY_free(s->s3->tmp.ecdh); |
| 1188 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
| 1189 |
goto err;
|
| 1190 |
} |
| 1191 |
|
| 1192 |
/* Duplicate the ECDH structure. */
|
| 1193 |
if (ecdhp == NULL) |
| 1194 |
{
|
| 1195 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
| 1196 |
goto err;
|
| 1197 |
} |
| 1198 |
if ((ecdh = EC_KEY_dup(ecdhp)) == NULL) |
| 1199 |
{
|
| 1200 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
| 1201 |
goto err;
|
| 1202 |
} |
| 1203 |
|
| 1204 |
s->s3->tmp.ecdh=ecdh; |
| 1205 |
if ((EC_KEY_get0_public_key(ecdh) == NULL) || |
| 1206 |
(EC_KEY_get0_private_key(ecdh) == NULL) ||
|
| 1207 |
(s->options & SSL_OP_SINGLE_ECDH_USE)) |
| 1208 |
{
|
| 1209 |
if(!EC_KEY_generate_key(ecdh))
|
| 1210 |
{
|
| 1211 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
| 1212 |
goto err;
|
| 1213 |
} |
| 1214 |
} |
| 1215 |
|
| 1216 |
if (((group = EC_KEY_get0_group(ecdh)) == NULL) || |
| 1217 |
(EC_KEY_get0_public_key(ecdh) == NULL) ||
|
| 1218 |
(EC_KEY_get0_private_key(ecdh) == NULL))
|
| 1219 |
{
|
| 1220 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
| 1221 |
goto err;
|
| 1222 |
} |
| 1223 |
|
| 1224 |
if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
|
| 1225 |
(EC_GROUP_get_degree(group) > 163))
|
| 1226 |
{
|
| 1227 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); |
| 1228 |
goto err;
|
| 1229 |
} |
| 1230 |
|
| 1231 |
/* XXX: For now, we only support ephemeral ECDH
|
| 1232 |
* keys over named (not generic) curves. For
|
| 1233 |
* supported named curves, curve_id is non-zero.
|
| 1234 |
*/
|
| 1235 |
if ((curve_id =
|
| 1236 |
tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group))) |
| 1237 |
== 0)
|
| 1238 |
{
|
| 1239 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); |
| 1240 |
goto err;
|
| 1241 |
} |
| 1242 |
|
| 1243 |
/* Encode the public key.
|
| 1244 |
* First check the size of encoding and
|
| 1245 |
* allocate memory accordingly.
|
| 1246 |
*/
|
| 1247 |
encodedlen = EC_POINT_point2oct(group, |
| 1248 |
EC_KEY_get0_public_key(ecdh), |
| 1249 |
POINT_CONVERSION_UNCOMPRESSED, |
| 1250 |
NULL, 0, NULL); |
| 1251 |
|
| 1252 |
encodedPoint = (unsigned char *) |
| 1253 |
OPENSSL_malloc(encodedlen*sizeof(unsigned char)); |
| 1254 |
bn_ctx = BN_CTX_new(); |
| 1255 |
if ((encodedPoint == NULL) || (bn_ctx == NULL)) |
| 1256 |
{
|
| 1257 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); |
| 1258 |
goto err;
|
| 1259 |
} |
| 1260 |
|
| 1261 |
|
| 1262 |
encodedlen = EC_POINT_point2oct(group, |
| 1263 |
EC_KEY_get0_public_key(ecdh), |
| 1264 |
POINT_CONVERSION_UNCOMPRESSED, |
| 1265 |
encodedPoint, encodedlen, bn_ctx); |
| 1266 |
|
| 1267 |
if (encodedlen == 0) |
| 1268 |
{
|
| 1269 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
| 1270 |
goto err;
|
| 1271 |
} |
| 1272 |
|
| 1273 |
BN_CTX_free(bn_ctx); bn_ctx=NULL;
|
| 1274 |
|
| 1275 |
/* XXX: For now, we only support named (not
|
| 1276 |
* generic) curves in ECDH ephemeral key exchanges.
|
| 1277 |
* In this situation, we need four additional bytes
|
| 1278 |
* to encode the entire ServerECDHParams
|
| 1279 |
* structure.
|
| 1280 |
*/
|
| 1281 |
n = 4 + encodedlen;
|
| 1282 |
|
| 1283 |
/* We'll generate the serverKeyExchange message
|
| 1284 |
* explicitly so we can set these to NULLs
|
| 1285 |
*/
|
| 1286 |
r[0]=NULL; |
| 1287 |
r[1]=NULL; |
| 1288 |
r[2]=NULL; |
| 1289 |
r[3]=NULL; |
| 1290 |
} |
| 1291 |
else
|
| 1292 |
#endif /* !OPENSSL_NO_ECDH */ |
| 1293 |
#ifndef OPENSSL_NO_PSK
|
| 1294 |
if (type & SSL_kPSK)
|
| 1295 |
{
|
| 1296 |
/* reserve size for record length and PSK identity hint*/
|
| 1297 |
n+=2+strlen(s->ctx->psk_identity_hint);
|
| 1298 |
} |
| 1299 |
else
|
| 1300 |
#endif /* !OPENSSL_NO_PSK */ |
| 1301 |
{
|
| 1302 |
al=SSL_AD_HANDSHAKE_FAILURE; |
| 1303 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
| 1304 |
goto f_err;
|
| 1305 |
} |
| 1306 |
for (i=0; r[i] != NULL; i++) |
| 1307 |
{
|
| 1308 |
nr[i]=BN_num_bytes(r[i]); |
| 1309 |
n+=2+nr[i];
|
| 1310 |
} |
| 1311 |
|
| 1312 |
if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
|
| 1313 |
&& !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) |
| 1314 |
{
|
| 1315 |
if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher, NULL)) |
| 1316 |
== NULL)
|
| 1317 |
{
|
| 1318 |
al=SSL_AD_DECODE_ERROR; |
| 1319 |
goto f_err;
|
| 1320 |
} |
| 1321 |
kn=EVP_PKEY_size(pkey); |
| 1322 |
} |
| 1323 |
else
|
| 1324 |
{
|
| 1325 |
pkey=NULL;
|
| 1326 |
kn=0;
|
| 1327 |
} |
| 1328 |
|
| 1329 |
if (!BUF_MEM_grow_clean(buf,n+DTLS1_HM_HEADER_LENGTH+kn))
|
| 1330 |
{
|
| 1331 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); |
| 1332 |
goto err;
|
| 1333 |
} |
| 1334 |
d=(unsigned char *)s->init_buf->data; |
| 1335 |
p= &(d[DTLS1_HM_HEADER_LENGTH]); |
| 1336 |
|
| 1337 |
for (i=0; r[i] != NULL; i++) |
| 1338 |
{
|
| 1339 |
s2n(nr[i],p); |
| 1340 |
BN_bn2bin(r[i],p); |
| 1341 |
p+=nr[i]; |
| 1342 |
} |
| 1343 |
|
| 1344 |
#ifndef OPENSSL_NO_ECDH
|
| 1345 |
if (type & SSL_kEECDH)
|
| 1346 |
{
|
| 1347 |
/* XXX: For now, we only support named (not generic) curves.
|
| 1348 |
* In this situation, the serverKeyExchange message has:
|
| 1349 |
* [1 byte CurveType], [2 byte CurveName]
|
| 1350 |
* [1 byte length of encoded point], followed by
|
| 1351 |
* the actual encoded point itself
|
| 1352 |
*/
|
| 1353 |
*p = NAMED_CURVE_TYPE; |
| 1354 |
p += 1;
|
| 1355 |
*p = 0;
|
| 1356 |
p += 1;
|
| 1357 |
*p = curve_id; |
| 1358 |
p += 1;
|
| 1359 |
*p = encodedlen; |
| 1360 |
p += 1;
|
| 1361 |
memcpy((unsigned char*)p, |
| 1362 |
(unsigned char *)encodedPoint, |
| 1363 |
encodedlen); |
| 1364 |
OPENSSL_free(encodedPoint); |
| 1365 |
encodedPoint = NULL;
|
| 1366 |
p += encodedlen; |
| 1367 |
} |
| 1368 |
#endif
|
| 1369 |
|
| 1370 |
#ifndef OPENSSL_NO_PSK
|
| 1371 |
if (type & SSL_kPSK)
|
| 1372 |
{
|
| 1373 |
/* copy PSK identity hint */
|
| 1374 |
s2n(strlen(s->ctx->psk_identity_hint), p); |
| 1375 |
strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint));
|
| 1376 |
p+=strlen(s->ctx->psk_identity_hint); |
| 1377 |
} |
| 1378 |
#endif
|
| 1379 |
|
| 1380 |
/* not anonymous */
|
| 1381 |
if (pkey != NULL) |
| 1382 |
{
|
| 1383 |
/* n is the length of the params, they start at
|
| 1384 |
* &(d[DTLS1_HM_HEADER_LENGTH]) and p points to the space
|
| 1385 |
* at the end. */
|
| 1386 |
#ifndef OPENSSL_NO_RSA
|
| 1387 |
if (pkey->type == EVP_PKEY_RSA)
|
| 1388 |
{
|
| 1389 |
q=md_buf; |
| 1390 |
j=0;
|
| 1391 |
for (num=2; num > 0; num--) |
| 1392 |
{
|
| 1393 |
EVP_DigestInit_ex(&md_ctx,(num == 2)
|
| 1394 |
?s->ctx->md5:s->ctx->sha1, NULL);
|
| 1395 |
EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
|
| 1396 |
EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
|
| 1397 |
EVP_DigestUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n); |
| 1398 |
EVP_DigestFinal_ex(&md_ctx,q, |
| 1399 |
(unsigned int *)&i); |
| 1400 |
q+=i; |
| 1401 |
j+=i; |
| 1402 |
} |
| 1403 |
if (RSA_sign(NID_md5_sha1, md_buf, j,
|
| 1404 |
&(p[2]), &u, pkey->pkey.rsa) <= 0) |
| 1405 |
{
|
| 1406 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); |
| 1407 |
goto err;
|
| 1408 |
} |
| 1409 |
s2n(u,p); |
| 1410 |
n+=u+2;
|
| 1411 |
} |
| 1412 |
else
|
| 1413 |
#endif
|
| 1414 |
#if !defined(OPENSSL_NO_DSA)
|
| 1415 |
if (pkey->type == EVP_PKEY_DSA)
|
| 1416 |
{
|
| 1417 |
/* lets do DSS */
|
| 1418 |
EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
|
| 1419 |
EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
|
| 1420 |
EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
|
| 1421 |
EVP_SignUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n); |
| 1422 |
if (!EVP_SignFinal(&md_ctx,&(p[2]), |
| 1423 |
(unsigned int *)&i,pkey)) |
| 1424 |
{
|
| 1425 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA); |
| 1426 |
goto err;
|
| 1427 |
} |
| 1428 |
s2n(i,p); |
| 1429 |
n+=i+2;
|
| 1430 |
} |
| 1431 |
else
|
| 1432 |
#endif
|
| 1433 |
#if !defined(OPENSSL_NO_ECDSA)
|
| 1434 |
if (pkey->type == EVP_PKEY_EC)
|
| 1435 |
{
|
| 1436 |
/* let's do ECDSA */
|
| 1437 |
EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
|
| 1438 |
EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
|
| 1439 |
EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
|
| 1440 |
EVP_SignUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n); |
| 1441 |
if (!EVP_SignFinal(&md_ctx,&(p[2]), |
| 1442 |
(unsigned int *)&i,pkey)) |
| 1443 |
{
|
| 1444 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA); |
| 1445 |
goto err;
|
| 1446 |
} |
| 1447 |
s2n(i,p); |
| 1448 |
n+=i+2;
|
| 1449 |
} |
| 1450 |
else
|
| 1451 |
#endif
|
| 1452 |
{
|
| 1453 |
/* Is this error check actually needed? */
|
| 1454 |
al=SSL_AD_HANDSHAKE_FAILURE; |
| 1455 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
| 1456 |
goto f_err;
|
| 1457 |
} |
| 1458 |
} |
| 1459 |
|
| 1460 |
d = dtls1_set_message_header(s, d, |
| 1461 |
SSL3_MT_SERVER_KEY_EXCHANGE, n, 0, n);
|
| 1462 |
|
| 1463 |
/* we should now have things packed up, so lets send
|
| 1464 |
* it off */
|
| 1465 |
s->init_num=n+DTLS1_HM_HEADER_LENGTH; |
| 1466 |
s->init_off=0;
|
| 1467 |
|
| 1468 |
/* buffer the message to handle re-xmits */
|
| 1469 |
dtls1_buffer_message(s, 0);
|
| 1470 |
} |
| 1471 |
|
| 1472 |
s->state = SSL3_ST_SW_KEY_EXCH_B; |
| 1473 |
EVP_MD_CTX_cleanup(&md_ctx); |
| 1474 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 1475 |
f_err:
|
| 1476 |
ssl3_send_alert(s,SSL3_AL_FATAL,al); |
| 1477 |
err:
|
| 1478 |
#ifndef OPENSSL_NO_ECDH
|
| 1479 |
if (encodedPoint != NULL) OPENSSL_free(encodedPoint); |
| 1480 |
BN_CTX_free(bn_ctx); |
| 1481 |
#endif
|
| 1482 |
EVP_MD_CTX_cleanup(&md_ctx); |
| 1483 |
return(-1); |
| 1484 |
} |
| 1485 |
|
| 1486 |
int dtls1_send_certificate_request(SSL *s)
|
| 1487 |
{
|
| 1488 |
unsigned char *p,*d; |
| 1489 |
int i,j,nl,off,n;
|
| 1490 |
STACK_OF(X509_NAME) *sk=NULL;
|
| 1491 |
X509_NAME *name; |
| 1492 |
BUF_MEM *buf; |
| 1493 |
unsigned int msg_len; |
| 1494 |
|
| 1495 |
if (s->state == SSL3_ST_SW_CERT_REQ_A)
|
| 1496 |
{
|
| 1497 |
buf=s->init_buf; |
| 1498 |
|
| 1499 |
d=p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH]); |
| 1500 |
|
| 1501 |
/* get the list of acceptable cert types */
|
| 1502 |
p++; |
| 1503 |
n=ssl3_get_req_cert_type(s,p); |
| 1504 |
d[0]=n;
|
| 1505 |
p+=n; |
| 1506 |
n++; |
| 1507 |
|
| 1508 |
off=n; |
| 1509 |
p+=2;
|
| 1510 |
n+=2;
|
| 1511 |
|
| 1512 |
sk=SSL_get_client_CA_list(s); |
| 1513 |
nl=0;
|
| 1514 |
if (sk != NULL) |
| 1515 |
{
|
| 1516 |
for (i=0; i<sk_X509_NAME_num(sk); i++) |
| 1517 |
{
|
| 1518 |
name=sk_X509_NAME_value(sk,i); |
| 1519 |
j=i2d_X509_NAME(name,NULL);
|
| 1520 |
if (!BUF_MEM_grow_clean(buf,DTLS1_HM_HEADER_LENGTH+n+j+2)) |
| 1521 |
{
|
| 1522 |
SSLerr(SSL_F_DTLS1_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); |
| 1523 |
goto err;
|
| 1524 |
} |
| 1525 |
p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+n]); |
| 1526 |
if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
|
| 1527 |
{
|
| 1528 |
s2n(j,p); |
| 1529 |
i2d_X509_NAME(name,&p); |
| 1530 |
n+=2+j;
|
| 1531 |
nl+=2+j;
|
| 1532 |
} |
| 1533 |
else
|
| 1534 |
{
|
| 1535 |
d=p; |
| 1536 |
i2d_X509_NAME(name,&p); |
| 1537 |
j-=2; s2n(j,d); j+=2; |
| 1538 |
n+=j; |
| 1539 |
nl+=j; |
| 1540 |
} |
| 1541 |
} |
| 1542 |
} |
| 1543 |
/* else no CA names */
|
| 1544 |
p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+off]); |
| 1545 |
s2n(nl,p); |
| 1546 |
|
| 1547 |
d=(unsigned char *)buf->data; |
| 1548 |
*(d++)=SSL3_MT_CERTIFICATE_REQUEST; |
| 1549 |
l2n3(n,d); |
| 1550 |
s2n(s->d1->handshake_write_seq,d); |
| 1551 |
s->d1->handshake_write_seq++; |
| 1552 |
|
| 1553 |
/* we should now have things packed up, so lets send
|
| 1554 |
* it off */
|
| 1555 |
|
| 1556 |
s->init_num=n+DTLS1_HM_HEADER_LENGTH; |
| 1557 |
s->init_off=0;
|
| 1558 |
#ifdef NETSCAPE_HANG_BUG
|
| 1559 |
/* XXX: what to do about this? */
|
| 1560 |
p=(unsigned char *)s->init_buf->data + s->init_num; |
| 1561 |
|
| 1562 |
/* do the header */
|
| 1563 |
*(p++)=SSL3_MT_SERVER_DONE; |
| 1564 |
*(p++)=0;
|
| 1565 |
*(p++)=0;
|
| 1566 |
*(p++)=0;
|
| 1567 |
s->init_num += 4;
|
| 1568 |
#endif
|
| 1569 |
|
| 1570 |
/* XDTLS: set message header ? */
|
| 1571 |
msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH; |
| 1572 |
dtls1_set_message_header(s, (void *)s->init_buf->data,
|
| 1573 |
SSL3_MT_CERTIFICATE_REQUEST, msg_len, 0, msg_len);
|
| 1574 |
|
| 1575 |
/* buffer the message to handle re-xmits */
|
| 1576 |
dtls1_buffer_message(s, 0);
|
| 1577 |
|
| 1578 |
s->state = SSL3_ST_SW_CERT_REQ_B; |
| 1579 |
} |
| 1580 |
|
| 1581 |
/* SSL3_ST_SW_CERT_REQ_B */
|
| 1582 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 1583 |
err:
|
| 1584 |
return(-1); |
| 1585 |
} |
| 1586 |
|
| 1587 |
int dtls1_send_server_certificate(SSL *s)
|
| 1588 |
{
|
| 1589 |
unsigned long l; |
| 1590 |
X509 *x; |
| 1591 |
|
| 1592 |
if (s->state == SSL3_ST_SW_CERT_A)
|
| 1593 |
{
|
| 1594 |
x=ssl_get_server_send_cert(s); |
| 1595 |
if (x == NULL) |
| 1596 |
{
|
| 1597 |
/* VRS: allow null cert if auth == KRB5 */
|
| 1598 |
if ((s->s3->tmp.new_cipher->algorithm_mkey != SSL_kKRB5) ||
|
| 1599 |
(s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5)) |
| 1600 |
{
|
| 1601 |
SSLerr(SSL_F_DTLS1_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); |
| 1602 |
return(0); |
| 1603 |
} |
| 1604 |
} |
| 1605 |
|
| 1606 |
l=dtls1_output_cert_chain(s,x); |
| 1607 |
s->state=SSL3_ST_SW_CERT_B; |
| 1608 |
s->init_num=(int)l;
|
| 1609 |
s->init_off=0;
|
| 1610 |
|
| 1611 |
/* buffer the message to handle re-xmits */
|
| 1612 |
dtls1_buffer_message(s, 0);
|
| 1613 |
} |
| 1614 |
|
| 1615 |
/* SSL3_ST_SW_CERT_B */
|
| 1616 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 1617 |
} |
| 1618 |
|
| 1619 |
#ifndef OPENSSL_NO_TLSEXT
|
| 1620 |
int dtls1_send_newsession_ticket(SSL *s)
|
| 1621 |
{
|
| 1622 |
if (s->state == SSL3_ST_SW_SESSION_TICKET_A)
|
| 1623 |
{
|
| 1624 |
unsigned char *p, *senc, *macstart; |
| 1625 |
int len, slen;
|
| 1626 |
unsigned int hlen, msg_len; |
| 1627 |
EVP_CIPHER_CTX ctx; |
| 1628 |
HMAC_CTX hctx; |
| 1629 |
SSL_CTX *tctx = s->initial_ctx; |
| 1630 |
unsigned char iv[EVP_MAX_IV_LENGTH]; |
| 1631 |
unsigned char key_name[16]; |
| 1632 |
|
| 1633 |
/* get session encoding length */
|
| 1634 |
slen = i2d_SSL_SESSION(s->session, NULL);
|
| 1635 |
/* Some length values are 16 bits, so forget it if session is
|
| 1636 |
* too long
|
| 1637 |
*/
|
| 1638 |
if (slen > 0xFF00) |
| 1639 |
return -1; |
| 1640 |
/* Grow buffer if need be: the length calculation is as
|
| 1641 |
* follows 12 (DTLS handshake message header) +
|
| 1642 |
* 4 (ticket lifetime hint) + 2 (ticket length) +
|
| 1643 |
* 16 (key name) + max_iv_len (iv length) +
|
| 1644 |
* session_length + max_enc_block_size (max encrypted session
|
| 1645 |
* length) + max_md_size (HMAC).
|
| 1646 |
*/
|
| 1647 |
if (!BUF_MEM_grow(s->init_buf,
|
| 1648 |
DTLS1_HM_HEADER_LENGTH + 22 + EVP_MAX_IV_LENGTH +
|
| 1649 |
EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + slen)) |
| 1650 |
return -1; |
| 1651 |
senc = OPENSSL_malloc(slen); |
| 1652 |
if (!senc)
|
| 1653 |
return -1; |
| 1654 |
p = senc; |
| 1655 |
i2d_SSL_SESSION(s->session, &p); |
| 1656 |
|
| 1657 |
p=(unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]); |
| 1658 |
EVP_CIPHER_CTX_init(&ctx); |
| 1659 |
HMAC_CTX_init(&hctx); |
| 1660 |
/* Initialize HMAC and cipher contexts. If callback present
|
| 1661 |
* it does all the work otherwise use generated values
|
| 1662 |
* from parent ctx.
|
| 1663 |
*/
|
| 1664 |
if (tctx->tlsext_ticket_key_cb)
|
| 1665 |
{
|
| 1666 |
if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx,
|
| 1667 |
&hctx, 1) < 0) |
| 1668 |
{
|
| 1669 |
OPENSSL_free(senc); |
| 1670 |
return -1; |
| 1671 |
} |
| 1672 |
} |
| 1673 |
else
|
| 1674 |
{
|
| 1675 |
RAND_pseudo_bytes(iv, 16);
|
| 1676 |
EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
|
| 1677 |
tctx->tlsext_tick_aes_key, iv); |
| 1678 |
HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
|
| 1679 |
tlsext_tick_md(), NULL);
|
| 1680 |
memcpy(key_name, tctx->tlsext_tick_key_name, 16);
|
| 1681 |
} |
| 1682 |
l2n(s->session->tlsext_tick_lifetime_hint, p); |
| 1683 |
/* Skip ticket length for now */
|
| 1684 |
p += 2;
|
| 1685 |
/* Output key name */
|
| 1686 |
macstart = p; |
| 1687 |
memcpy(p, key_name, 16);
|
| 1688 |
p += 16;
|
| 1689 |
/* output IV */
|
| 1690 |
memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx)); |
| 1691 |
p += EVP_CIPHER_CTX_iv_length(&ctx); |
| 1692 |
/* Encrypt session data */
|
| 1693 |
EVP_EncryptUpdate(&ctx, p, &len, senc, slen); |
| 1694 |
p += len; |
| 1695 |
EVP_EncryptFinal(&ctx, p, &len); |
| 1696 |
p += len; |
| 1697 |
EVP_CIPHER_CTX_cleanup(&ctx); |
| 1698 |
|
| 1699 |
HMAC_Update(&hctx, macstart, p - macstart); |
| 1700 |
HMAC_Final(&hctx, p, &hlen); |
| 1701 |
HMAC_CTX_cleanup(&hctx); |
| 1702 |
|
| 1703 |
p += hlen; |
| 1704 |
/* Now write out lengths: p points to end of data written */
|
| 1705 |
/* Total length */
|
| 1706 |
len = p - (unsigned char *)(s->init_buf->data); |
| 1707 |
/* Ticket length */
|
| 1708 |
p=(unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]) + 4; |
| 1709 |
s2n(len - DTLS1_HM_HEADER_LENGTH - 6, p);
|
| 1710 |
|
| 1711 |
/* number of bytes to write */
|
| 1712 |
s->init_num= len; |
| 1713 |
s->state=SSL3_ST_SW_SESSION_TICKET_B; |
| 1714 |
s->init_off=0;
|
| 1715 |
OPENSSL_free(senc); |
| 1716 |
|
| 1717 |
/* XDTLS: set message header ? */
|
| 1718 |
msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH; |
| 1719 |
dtls1_set_message_header(s, (void *)s->init_buf->data,
|
| 1720 |
SSL3_MT_NEWSESSION_TICKET, msg_len, 0, msg_len);
|
| 1721 |
|
| 1722 |
/* buffer the message to handle re-xmits */
|
| 1723 |
dtls1_buffer_message(s, 0);
|
| 1724 |
} |
| 1725 |
|
| 1726 |
/* SSL3_ST_SW_SESSION_TICKET_B */
|
| 1727 |
return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
|
| 1728 |
} |
| 1729 |
#endif
|