Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* ssl/d1_clnt.c */ |
| 2 | /* |
| 3 | * DTLS implementation written by Nagendra Modadugu |
| 4 | * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. |
| 5 | */ |
| 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; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 153 | int new_state,state,skip=0;; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 154 | |
| 155 | RAND_add(&Time,sizeof(Time),0); |
| 156 | ERR_clear_error(); |
| 157 | clear_sys_error(); |
| 158 | |
| 159 | if (s->info_callback != NULL) |
| 160 | cb=s->info_callback; |
| 161 | else if (s->ctx->info_callback != NULL) |
| 162 | cb=s->ctx->info_callback; |
| 163 | |
| 164 | s->in_handshake++; |
| 165 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
| 166 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 167 | for (;;) |
| 168 | { |
| 169 | state=s->state; |
| 170 | |
| 171 | switch(s->state) |
| 172 | { |
| 173 | case SSL_ST_RENEGOTIATE: |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 174 | s->new_session=1; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 175 | s->state=SSL_ST_CONNECT; |
| 176 | s->ctx->stats.sess_connect_renegotiate++; |
| 177 | /* break */ |
| 178 | case SSL_ST_BEFORE: |
| 179 | case SSL_ST_CONNECT: |
| 180 | case SSL_ST_BEFORE|SSL_ST_CONNECT: |
| 181 | case SSL_ST_OK|SSL_ST_CONNECT: |
| 182 | |
| 183 | s->server=0; |
| 184 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
| 185 | |
| 186 | if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) && |
| 187 | (s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00)) |
| 188 | { |
| 189 | SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR); |
| 190 | ret = -1; |
| 191 | goto end; |
| 192 | } |
| 193 | |
| 194 | /* s->version=SSL3_VERSION; */ |
| 195 | s->type=SSL_ST_CONNECT; |
| 196 | |
| 197 | if (s->init_buf == NULL) |
| 198 | { |
| 199 | if ((buf=BUF_MEM_new()) == NULL) |
| 200 | { |
| 201 | ret= -1; |
| 202 | goto end; |
| 203 | } |
| 204 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) |
| 205 | { |
| 206 | ret= -1; |
| 207 | goto end; |
| 208 | } |
| 209 | s->init_buf=buf; |
| 210 | buf=NULL; |
| 211 | } |
| 212 | |
| 213 | if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } |
| 214 | |
| 215 | /* setup buffing BIO */ |
| 216 | if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } |
| 217 | |
| 218 | /* don't push the buffering BIO quite yet */ |
| 219 | |
| 220 | s->state=SSL3_ST_CW_CLNT_HELLO_A; |
| 221 | s->ctx->stats.sess_connect++; |
| 222 | s->init_num=0; |
| 223 | /* mark client_random uninitialized */ |
| 224 | memset(s->s3->client_random,0,sizeof(s->s3->client_random)); |
| 225 | s->d1->send_cookie = 0; |
| 226 | s->hit = 0; |
| 227 | break; |
| 228 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 229 | case SSL3_ST_CW_CLNT_HELLO_A: |
| 230 | case SSL3_ST_CW_CLNT_HELLO_B: |
| 231 | |
| 232 | s->shutdown=0; |
| 233 | |
| 234 | /* every DTLS ClientHello resets Finished MAC */ |
| 235 | ssl3_init_finished_mac(s); |
| 236 | |
| 237 | dtls1_start_timer(s); |
| 238 | ret=dtls1_client_hello(s); |
| 239 | if (ret <= 0) goto end; |
| 240 | |
| 241 | if ( s->d1->send_cookie) |
| 242 | { |
| 243 | s->state=SSL3_ST_CW_FLUSH; |
| 244 | s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A; |
| 245 | } |
| 246 | else |
| 247 | s->state=SSL3_ST_CR_SRVR_HELLO_A; |
| 248 | |
| 249 | s->init_num=0; |
| 250 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 251 | /* turn on buffering for the next lot of output */ |
| 252 | if (s->bbio != s->wbio) |
| 253 | s->wbio=BIO_push(s->bbio,s->wbio); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 254 | |
| 255 | break; |
| 256 | |
| 257 | case SSL3_ST_CR_SRVR_HELLO_A: |
| 258 | case SSL3_ST_CR_SRVR_HELLO_B: |
| 259 | ret=ssl3_get_server_hello(s); |
| 260 | if (ret <= 0) goto end; |
| 261 | else |
| 262 | { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 263 | dtls1_stop_timer(s); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 264 | if (s->hit) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 265 | s->state=SSL3_ST_CR_FINISHED_A; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 266 | else |
| 267 | s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A; |
| 268 | } |
| 269 | s->init_num=0; |
| 270 | break; |
| 271 | |
| 272 | case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A: |
| 273 | case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B: |
| 274 | |
| 275 | ret = dtls1_get_hello_verify(s); |
| 276 | if ( ret <= 0) |
| 277 | goto end; |
| 278 | dtls1_stop_timer(s); |
| 279 | if ( s->d1->send_cookie) /* start again, with a cookie */ |
| 280 | s->state=SSL3_ST_CW_CLNT_HELLO_A; |
| 281 | else |
| 282 | s->state = SSL3_ST_CR_CERT_A; |
| 283 | s->init_num = 0; |
| 284 | break; |
| 285 | |
| 286 | case SSL3_ST_CR_CERT_A: |
| 287 | case SSL3_ST_CR_CERT_B: |
| 288 | #ifndef OPENSSL_NO_TLSEXT |
| 289 | ret=ssl3_check_finished(s); |
| 290 | if (ret <= 0) goto end; |
| 291 | if (ret == 2) |
| 292 | { |
| 293 | s->hit = 1; |
| 294 | if (s->tlsext_ticket_expected) |
| 295 | s->state=SSL3_ST_CR_SESSION_TICKET_A; |
| 296 | else |
| 297 | s->state=SSL3_ST_CR_FINISHED_A; |
| 298 | s->init_num=0; |
| 299 | break; |
| 300 | } |
| 301 | #endif |
| 302 | /* Check if it is anon DH or PSK */ |
| 303 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && |
| 304 | !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) |
| 305 | { |
| 306 | ret=ssl3_get_server_certificate(s); |
| 307 | if (ret <= 0) goto end; |
| 308 | #ifndef OPENSSL_NO_TLSEXT |
| 309 | if (s->tlsext_status_expected) |
| 310 | s->state=SSL3_ST_CR_CERT_STATUS_A; |
| 311 | else |
| 312 | s->state=SSL3_ST_CR_KEY_EXCH_A; |
| 313 | } |
| 314 | else |
| 315 | { |
| 316 | skip = 1; |
| 317 | s->state=SSL3_ST_CR_KEY_EXCH_A; |
| 318 | } |
| 319 | #else |
| 320 | } |
| 321 | else |
| 322 | skip=1; |
| 323 | |
| 324 | s->state=SSL3_ST_CR_KEY_EXCH_A; |
| 325 | #endif |
| 326 | s->init_num=0; |
| 327 | break; |
| 328 | |
| 329 | case SSL3_ST_CR_KEY_EXCH_A: |
| 330 | case SSL3_ST_CR_KEY_EXCH_B: |
| 331 | ret=ssl3_get_key_exchange(s); |
| 332 | if (ret <= 0) goto end; |
| 333 | s->state=SSL3_ST_CR_CERT_REQ_A; |
| 334 | s->init_num=0; |
| 335 | |
| 336 | /* at this point we check that we have the |
| 337 | * required stuff from the server */ |
| 338 | if (!ssl3_check_cert_and_algorithm(s)) |
| 339 | { |
| 340 | ret= -1; |
| 341 | goto end; |
| 342 | } |
| 343 | break; |
| 344 | |
| 345 | case SSL3_ST_CR_CERT_REQ_A: |
| 346 | case SSL3_ST_CR_CERT_REQ_B: |
| 347 | ret=ssl3_get_certificate_request(s); |
| 348 | if (ret <= 0) goto end; |
| 349 | s->state=SSL3_ST_CR_SRVR_DONE_A; |
| 350 | s->init_num=0; |
| 351 | break; |
| 352 | |
| 353 | case SSL3_ST_CR_SRVR_DONE_A: |
| 354 | case SSL3_ST_CR_SRVR_DONE_B: |
| 355 | ret=ssl3_get_server_done(s); |
| 356 | if (ret <= 0) goto end; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 357 | if (s->s3->tmp.cert_req) |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 358 | s->state=SSL3_ST_CW_CERT_A; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 359 | else |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 360 | s->state=SSL3_ST_CW_KEY_EXCH_A; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 361 | s->init_num=0; |
| 362 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 363 | break; |
| 364 | |
| 365 | case SSL3_ST_CW_CERT_A: |
| 366 | case SSL3_ST_CW_CERT_B: |
| 367 | case SSL3_ST_CW_CERT_C: |
| 368 | case SSL3_ST_CW_CERT_D: |
| 369 | dtls1_start_timer(s); |
| 370 | ret=dtls1_send_client_certificate(s); |
| 371 | if (ret <= 0) goto end; |
| 372 | s->state=SSL3_ST_CW_KEY_EXCH_A; |
| 373 | s->init_num=0; |
| 374 | break; |
| 375 | |
| 376 | case SSL3_ST_CW_KEY_EXCH_A: |
| 377 | case SSL3_ST_CW_KEY_EXCH_B: |
| 378 | dtls1_start_timer(s); |
| 379 | ret=dtls1_send_client_key_exchange(s); |
| 380 | if (ret <= 0) goto end; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 381 | /* EAY EAY EAY need to check for DH fix cert |
| 382 | * sent back */ |
| 383 | /* For TLS, cert_req is set to 2, so a cert chain |
| 384 | * of nothing is sent, but no verify packet is sent */ |
| 385 | if (s->s3->tmp.cert_req == 1) |
| 386 | { |
| 387 | s->state=SSL3_ST_CW_CERT_VRFY_A; |
| 388 | } |
| 389 | else |
| 390 | { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 391 | s->state=SSL3_ST_CW_CHANGE_A; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 392 | s->s3->change_cipher_spec=0; |
| 393 | } |
| 394 | |
| 395 | s->init_num=0; |
| 396 | break; |
| 397 | |
| 398 | case SSL3_ST_CW_CERT_VRFY_A: |
| 399 | case SSL3_ST_CW_CERT_VRFY_B: |
| 400 | dtls1_start_timer(s); |
| 401 | ret=dtls1_send_client_verify(s); |
| 402 | if (ret <= 0) goto end; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 403 | s->state=SSL3_ST_CW_CHANGE_A; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 404 | s->init_num=0; |
| 405 | s->s3->change_cipher_spec=0; |
| 406 | break; |
| 407 | |
| 408 | case SSL3_ST_CW_CHANGE_A: |
| 409 | case SSL3_ST_CW_CHANGE_B: |
| 410 | if (!s->hit) |
| 411 | dtls1_start_timer(s); |
| 412 | ret=dtls1_send_change_cipher_spec(s, |
| 413 | SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); |
| 414 | if (ret <= 0) goto end; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 415 | s->state=SSL3_ST_CW_FINISHED_A; |
| 416 | s->init_num=0; |
| 417 | |
| 418 | s->session->cipher=s->s3->tmp.new_cipher; |
| 419 | #ifdef OPENSSL_NO_COMP |
| 420 | s->session->compress_meth=0; |
| 421 | #else |
| 422 | if (s->s3->tmp.new_compression == NULL) |
| 423 | s->session->compress_meth=0; |
| 424 | else |
| 425 | s->session->compress_meth= |
| 426 | s->s3->tmp.new_compression->id; |
| 427 | #endif |
| 428 | if (!s->method->ssl3_enc->setup_key_block(s)) |
| 429 | { |
| 430 | ret= -1; |
| 431 | goto end; |
| 432 | } |
| 433 | |
| 434 | if (!s->method->ssl3_enc->change_cipher_state(s, |
| 435 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) |
| 436 | { |
| 437 | ret= -1; |
| 438 | goto end; |
| 439 | } |
| 440 | |
| 441 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); |
| 442 | break; |
| 443 | |
| 444 | case SSL3_ST_CW_FINISHED_A: |
| 445 | case SSL3_ST_CW_FINISHED_B: |
| 446 | if (!s->hit) |
| 447 | dtls1_start_timer(s); |
| 448 | ret=dtls1_send_finished(s, |
| 449 | SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, |
| 450 | s->method->ssl3_enc->client_finished_label, |
| 451 | s->method->ssl3_enc->client_finished_label_len); |
| 452 | if (ret <= 0) goto end; |
| 453 | s->state=SSL3_ST_CW_FLUSH; |
| 454 | |
| 455 | /* clear flags */ |
| 456 | s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; |
| 457 | if (s->hit) |
| 458 | { |
| 459 | s->s3->tmp.next_state=SSL_ST_OK; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 460 | if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) |
| 461 | { |
| 462 | s->state=SSL_ST_OK; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 463 | s->s3->flags|=SSL3_FLAGS_POP_BUFFER; |
| 464 | s->s3->delay_buf_pop_ret=0; |
| 465 | } |
| 466 | } |
| 467 | else |
| 468 | { |
| 469 | #ifndef OPENSSL_NO_TLSEXT |
| 470 | /* Allow NewSessionTicket if ticket expected */ |
| 471 | if (s->tlsext_ticket_expected) |
| 472 | s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; |
| 473 | else |
| 474 | #endif |
| 475 | |
| 476 | s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; |
| 477 | } |
| 478 | s->init_num=0; |
| 479 | break; |
| 480 | |
| 481 | #ifndef OPENSSL_NO_TLSEXT |
| 482 | case SSL3_ST_CR_SESSION_TICKET_A: |
| 483 | case SSL3_ST_CR_SESSION_TICKET_B: |
| 484 | ret=ssl3_get_new_session_ticket(s); |
| 485 | if (ret <= 0) goto end; |
| 486 | s->state=SSL3_ST_CR_FINISHED_A; |
| 487 | s->init_num=0; |
| 488 | break; |
| 489 | |
| 490 | case SSL3_ST_CR_CERT_STATUS_A: |
| 491 | case SSL3_ST_CR_CERT_STATUS_B: |
| 492 | ret=ssl3_get_cert_status(s); |
| 493 | if (ret <= 0) goto end; |
| 494 | s->state=SSL3_ST_CR_KEY_EXCH_A; |
| 495 | s->init_num=0; |
| 496 | break; |
| 497 | #endif |
| 498 | |
| 499 | case SSL3_ST_CR_FINISHED_A: |
| 500 | case SSL3_ST_CR_FINISHED_B: |
| 501 | s->d1->change_cipher_spec_ok = 1; |
| 502 | ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, |
| 503 | SSL3_ST_CR_FINISHED_B); |
| 504 | if (ret <= 0) goto end; |
| 505 | dtls1_stop_timer(s); |
| 506 | |
| 507 | if (s->hit) |
| 508 | s->state=SSL3_ST_CW_CHANGE_A; |
| 509 | else |
| 510 | s->state=SSL_ST_OK; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 511 | s->init_num=0; |
| 512 | break; |
| 513 | |
| 514 | case SSL3_ST_CW_FLUSH: |
| 515 | s->rwstate=SSL_WRITING; |
| 516 | if (BIO_flush(s->wbio) <= 0) |
| 517 | { |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 518 | ret= -1; |
| 519 | goto end; |
| 520 | } |
| 521 | s->rwstate=SSL_NOTHING; |
| 522 | s->state=s->s3->tmp.next_state; |
| 523 | break; |
| 524 | |
| 525 | case SSL_ST_OK: |
| 526 | /* clean a few things up */ |
| 527 | ssl3_cleanup_key_block(s); |
| 528 | |
| 529 | #if 0 |
| 530 | if (s->init_buf != NULL) |
| 531 | { |
| 532 | BUF_MEM_free(s->init_buf); |
| 533 | s->init_buf=NULL; |
| 534 | } |
| 535 | #endif |
| 536 | |
| 537 | /* If we are not 'joining' the last two packets, |
| 538 | * remove the buffering now */ |
| 539 | if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) |
| 540 | ssl_free_wbio_buffer(s); |
| 541 | /* else do it later in ssl3_write */ |
| 542 | |
| 543 | s->init_num=0; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 544 | s->new_session=0; |
| 545 | |
| 546 | ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); |
| 547 | if (s->hit) s->ctx->stats.sess_hit++; |
| 548 | |
| 549 | ret=1; |
| 550 | /* s->server=0; */ |
| 551 | s->handshake_func=dtls1_connect; |
| 552 | s->ctx->stats.sess_connect_good++; |
| 553 | |
| 554 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
| 555 | |
| 556 | /* done with handshaking */ |
| 557 | s->d1->handshake_read_seq = 0; |
| 558 | s->d1->next_handshake_write_seq = 0; |
| 559 | goto end; |
| 560 | /* break; */ |
| 561 | |
| 562 | default: |
| 563 | SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE); |
| 564 | ret= -1; |
| 565 | goto end; |
| 566 | /* break; */ |
| 567 | } |
| 568 | |
| 569 | /* did we do anything */ |
| 570 | if (!s->s3->tmp.reuse_message && !skip) |
| 571 | { |
| 572 | if (s->debug) |
| 573 | { |
| 574 | if ((ret=BIO_flush(s->wbio)) <= 0) |
| 575 | goto end; |
| 576 | } |
| 577 | |
| 578 | if ((cb != NULL) && (s->state != state)) |
| 579 | { |
| 580 | new_state=s->state; |
| 581 | s->state=state; |
| 582 | cb(s,SSL_CB_CONNECT_LOOP,1); |
| 583 | s->state=new_state; |
| 584 | } |
| 585 | } |
| 586 | skip=0; |
| 587 | } |
| 588 | end: |
| 589 | s->in_handshake--; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 590 | if (buf != NULL) |
| 591 | BUF_MEM_free(buf); |
| 592 | if (cb != NULL) |
| 593 | cb(s,SSL_CB_CONNECT_EXIT,ret); |
| 594 | return(ret); |
| 595 | } |
| 596 | |
| 597 | int dtls1_client_hello(SSL *s) |
| 598 | { |
| 599 | unsigned char *buf; |
| 600 | unsigned char *p,*d; |
| 601 | unsigned int i,j; |
| 602 | unsigned long Time,l; |
| 603 | SSL_COMP *comp; |
| 604 | |
| 605 | buf=(unsigned char *)s->init_buf->data; |
| 606 | if (s->state == SSL3_ST_CW_CLNT_HELLO_A) |
| 607 | { |
| 608 | SSL_SESSION *sess = s->session; |
| 609 | if ((s->session == NULL) || |
| 610 | (s->session->ssl_version != s->version) || |
| 611 | #ifdef OPENSSL_NO_TLSEXT |
| 612 | !sess->session_id_length || |
| 613 | #else |
| 614 | (!sess->session_id_length && !sess->tlsext_tick) || |
| 615 | #endif |
| 616 | (s->session->not_resumable)) |
| 617 | { |
| 618 | if (!s->session_creation_enabled) |
| 619 | { |
| 620 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); |
| 621 | SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED); |
| 622 | goto err; |
| 623 | } |
| 624 | if (!ssl_get_new_session(s,0)) |
| 625 | goto err; |
| 626 | } |
| 627 | /* else use the pre-loaded session */ |
| 628 | |
| 629 | p=s->s3->client_random; |
| 630 | |
| 631 | /* if client_random is initialized, reuse it, we are |
| 632 | * required to use same upon reply to HelloVerify */ |
| 633 | for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++) ; |
| 634 | if (i==sizeof(s->s3->client_random)) |
| 635 | { |
| 636 | Time=(unsigned long)time(NULL); /* Time */ |
| 637 | l2n(Time,p); |
| 638 | RAND_pseudo_bytes(p,sizeof(s->s3->client_random)-4); |
| 639 | } |
| 640 | |
| 641 | /* Do the message type and length last */ |
| 642 | d=p= &(buf[DTLS1_HM_HEADER_LENGTH]); |
| 643 | |
| 644 | *(p++)=s->version>>8; |
| 645 | *(p++)=s->version&0xff; |
| 646 | s->client_version=s->version; |
| 647 | |
| 648 | /* Random stuff */ |
| 649 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); |
| 650 | p+=SSL3_RANDOM_SIZE; |
| 651 | |
| 652 | /* Session ID */ |
| 653 | if (s->new_session) |
| 654 | i=0; |
| 655 | else |
| 656 | i=s->session->session_id_length; |
| 657 | *(p++)=i; |
| 658 | if (i != 0) |
| 659 | { |
| 660 | if (i > sizeof s->session->session_id) |
| 661 | { |
| 662 | SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
| 663 | goto err; |
| 664 | } |
| 665 | memcpy(p,s->session->session_id,i); |
| 666 | p+=i; |
| 667 | } |
| 668 | |
| 669 | /* cookie stuff */ |
| 670 | if ( s->d1->cookie_len > sizeof(s->d1->cookie)) |
| 671 | { |
| 672 | SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
| 673 | goto err; |
| 674 | } |
| 675 | *(p++) = s->d1->cookie_len; |
| 676 | memcpy(p, s->d1->cookie, s->d1->cookie_len); |
| 677 | p += s->d1->cookie_len; |
| 678 | |
| 679 | /* Ciphers supported */ |
| 680 | i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); |
| 681 | if (i == 0) |
| 682 | { |
| 683 | SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); |
| 684 | goto err; |
| 685 | } |
| 686 | s2n(i,p); |
| 687 | p+=i; |
| 688 | |
| 689 | /* COMPRESSION */ |
| 690 | if (s->ctx->comp_methods == NULL) |
| 691 | j=0; |
| 692 | else |
| 693 | j=sk_SSL_COMP_num(s->ctx->comp_methods); |
| 694 | *(p++)=1+j; |
| 695 | for (i=0; i<j; i++) |
| 696 | { |
| 697 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); |
| 698 | *(p++)=comp->id; |
| 699 | } |
| 700 | *(p++)=0; /* Add the NULL method */ |
| 701 | |
| 702 | #ifndef OPENSSL_NO_TLSEXT |
| 703 | if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) |
| 704 | { |
| 705 | SSLerr(SSL_F_DTLS1_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); |
| 706 | goto err; |
| 707 | } |
| 708 | #endif |
| 709 | |
| 710 | l=(p-d); |
| 711 | d=buf; |
| 712 | |
| 713 | d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l); |
| 714 | |
| 715 | s->state=SSL3_ST_CW_CLNT_HELLO_B; |
| 716 | /* number of bytes to write */ |
| 717 | s->init_num=p-buf; |
| 718 | s->init_off=0; |
| 719 | |
| 720 | /* buffer the message to handle re-xmits */ |
| 721 | dtls1_buffer_message(s, 0); |
| 722 | } |
| 723 | |
| 724 | /* SSL3_ST_CW_CLNT_HELLO_B */ |
| 725 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); |
| 726 | err: |
| 727 | return(-1); |
| 728 | } |
| 729 | |
| 730 | static int dtls1_get_hello_verify(SSL *s) |
| 731 | { |
| 732 | int n, al, ok = 0; |
| 733 | unsigned char *data; |
| 734 | unsigned int cookie_len; |
| 735 | |
| 736 | n=s->method->ssl_get_message(s, |
| 737 | DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A, |
| 738 | DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B, |
| 739 | -1, |
| 740 | s->max_cert_list, |
| 741 | &ok); |
| 742 | |
| 743 | if (!ok) return((int)n); |
| 744 | |
| 745 | if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) |
| 746 | { |
| 747 | s->d1->send_cookie = 0; |
| 748 | s->s3->tmp.reuse_message=1; |
| 749 | return(1); |
| 750 | } |
| 751 | |
| 752 | data = (unsigned char *)s->init_msg; |
| 753 | |
| 754 | if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff))) |
| 755 | { |
| 756 | SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION); |
| 757 | s->version=(s->version&0xff00)|data[1]; |
| 758 | al = SSL_AD_PROTOCOL_VERSION; |
| 759 | goto f_err; |
| 760 | } |
| 761 | data+=2; |
| 762 | |
| 763 | cookie_len = *(data++); |
| 764 | if ( cookie_len > sizeof(s->d1->cookie)) |
| 765 | { |
| 766 | al=SSL_AD_ILLEGAL_PARAMETER; |
| 767 | goto f_err; |
| 768 | } |
| 769 | |
| 770 | memcpy(s->d1->cookie, data, cookie_len); |
| 771 | s->d1->cookie_len = cookie_len; |
| 772 | |
| 773 | s->d1->send_cookie = 1; |
| 774 | return 1; |
| 775 | |
| 776 | f_err: |
| 777 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
| 778 | return -1; |
| 779 | } |
| 780 | |
| 781 | int dtls1_send_client_key_exchange(SSL *s) |
| 782 | { |
| 783 | unsigned char *p,*d; |
| 784 | int n; |
| 785 | unsigned long alg_k; |
| 786 | #ifndef OPENSSL_NO_RSA |
| 787 | unsigned char *q; |
| 788 | EVP_PKEY *pkey=NULL; |
| 789 | #endif |
| 790 | #ifndef OPENSSL_NO_KRB5 |
| 791 | KSSL_ERR kssl_err; |
| 792 | #endif /* OPENSSL_NO_KRB5 */ |
| 793 | #ifndef OPENSSL_NO_ECDH |
| 794 | EC_KEY *clnt_ecdh = NULL; |
| 795 | const EC_POINT *srvr_ecpoint = NULL; |
| 796 | EVP_PKEY *srvr_pub_pkey = NULL; |
| 797 | unsigned char *encodedPoint = NULL; |
| 798 | int encoded_pt_len = 0; |
| 799 | BN_CTX * bn_ctx = NULL; |
| 800 | #endif |
| 801 | |
| 802 | if (s->state == SSL3_ST_CW_KEY_EXCH_A) |
| 803 | { |
| 804 | d=(unsigned char *)s->init_buf->data; |
| 805 | p= &(d[DTLS1_HM_HEADER_LENGTH]); |
| 806 | |
| 807 | alg_k=s->s3->tmp.new_cipher->algorithm_mkey; |
| 808 | |
| 809 | /* Fool emacs indentation */ |
| 810 | if (0) {} |
| 811 | #ifndef OPENSSL_NO_RSA |
| 812 | else if (alg_k & SSL_kRSA) |
| 813 | { |
| 814 | RSA *rsa; |
| 815 | unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; |
| 816 | |
| 817 | if (s->session->sess_cert->peer_rsa_tmp != NULL) |
| 818 | rsa=s->session->sess_cert->peer_rsa_tmp; |
| 819 | else |
| 820 | { |
| 821 | pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); |
| 822 | if ((pkey == NULL) || |
| 823 | (pkey->type != EVP_PKEY_RSA) || |
| 824 | (pkey->pkey.rsa == NULL)) |
| 825 | { |
| 826 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); |
| 827 | goto err; |
| 828 | } |
| 829 | rsa=pkey->pkey.rsa; |
| 830 | EVP_PKEY_free(pkey); |
| 831 | } |
| 832 | |
| 833 | tmp_buf[0]=s->client_version>>8; |
| 834 | tmp_buf[1]=s->client_version&0xff; |
| 835 | if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) |
| 836 | goto err; |
| 837 | |
| 838 | s->session->master_key_length=sizeof tmp_buf; |
| 839 | |
| 840 | q=p; |
| 841 | /* Fix buf for TLS and [incidentally] DTLS */ |
| 842 | if (s->version > SSL3_VERSION) |
| 843 | p+=2; |
| 844 | n=RSA_public_encrypt(sizeof tmp_buf, |
| 845 | tmp_buf,p,rsa,RSA_PKCS1_PADDING); |
| 846 | #ifdef PKCS1_CHECK |
| 847 | if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; |
| 848 | if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; |
| 849 | #endif |
| 850 | if (n <= 0) |
| 851 | { |
| 852 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); |
| 853 | goto err; |
| 854 | } |
| 855 | |
| 856 | /* Fix buf for TLS and [incidentally] DTLS */ |
| 857 | if (s->version > SSL3_VERSION) |
| 858 | { |
| 859 | s2n(n,q); |
| 860 | n+=2; |
| 861 | } |
| 862 | |
| 863 | s->session->master_key_length= |
| 864 | s->method->ssl3_enc->generate_master_secret(s, |
| 865 | s->session->master_key, |
| 866 | tmp_buf,sizeof tmp_buf); |
| 867 | OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); |
| 868 | } |
| 869 | #endif |
| 870 | #ifndef OPENSSL_NO_KRB5 |
| 871 | else if (alg_k & SSL_kKRB5) |
| 872 | { |
| 873 | krb5_error_code krb5rc; |
| 874 | KSSL_CTX *kssl_ctx = s->kssl_ctx; |
| 875 | /* krb5_data krb5_ap_req; */ |
| 876 | krb5_data *enc_ticket; |
| 877 | krb5_data authenticator, *authp = NULL; |
| 878 | EVP_CIPHER_CTX ciph_ctx; |
| 879 | const EVP_CIPHER *enc = NULL; |
| 880 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
| 881 | unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; |
| 882 | unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH |
| 883 | + EVP_MAX_IV_LENGTH]; |
| 884 | int padl, outl = sizeof(epms); |
| 885 | |
| 886 | EVP_CIPHER_CTX_init(&ciph_ctx); |
| 887 | |
| 888 | #ifdef KSSL_DEBUG |
| 889 | printf("ssl3_send_client_key_exchange(%lx & %lx)\n", |
| 890 | alg_k, SSL_kKRB5); |
| 891 | #endif /* KSSL_DEBUG */ |
| 892 | |
| 893 | authp = NULL; |
| 894 | #ifdef KRB5SENDAUTH |
| 895 | if (KRB5SENDAUTH) authp = &authenticator; |
| 896 | #endif /* KRB5SENDAUTH */ |
| 897 | |
| 898 | krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, |
| 899 | &kssl_err); |
| 900 | enc = kssl_map_enc(kssl_ctx->enctype); |
| 901 | if (enc == NULL) |
| 902 | goto err; |
| 903 | #ifdef KSSL_DEBUG |
| 904 | { |
| 905 | printf("kssl_cget_tkt rtn %d\n", krb5rc); |
| 906 | if (krb5rc && kssl_err.text) |
| 907 | printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); |
| 908 | } |
| 909 | #endif /* KSSL_DEBUG */ |
| 910 | |
| 911 | if (krb5rc) |
| 912 | { |
| 913 | ssl3_send_alert(s,SSL3_AL_FATAL, |
| 914 | SSL_AD_HANDSHAKE_FAILURE); |
| 915 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 916 | kssl_err.reason); |
| 917 | goto err; |
| 918 | } |
| 919 | |
| 920 | /* 20010406 VRS - Earlier versions used KRB5 AP_REQ |
| 921 | ** in place of RFC 2712 KerberosWrapper, as in: |
| 922 | ** |
| 923 | ** Send ticket (copy to *p, set n = length) |
| 924 | ** n = krb5_ap_req.length; |
| 925 | ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); |
| 926 | ** if (krb5_ap_req.data) |
| 927 | ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); |
| 928 | ** |
| 929 | ** Now using real RFC 2712 KerberosWrapper |
| 930 | ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) |
| 931 | ** Note: 2712 "opaque" types are here replaced |
| 932 | ** with a 2-byte length followed by the value. |
| 933 | ** Example: |
| 934 | ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms |
| 935 | ** Where "xx xx" = length bytes. Shown here with |
| 936 | ** optional authenticator omitted. |
| 937 | */ |
| 938 | |
| 939 | /* KerberosWrapper.Ticket */ |
| 940 | s2n(enc_ticket->length,p); |
| 941 | memcpy(p, enc_ticket->data, enc_ticket->length); |
| 942 | p+= enc_ticket->length; |
| 943 | n = enc_ticket->length + 2; |
| 944 | |
| 945 | /* KerberosWrapper.Authenticator */ |
| 946 | if (authp && authp->length) |
| 947 | { |
| 948 | s2n(authp->length,p); |
| 949 | memcpy(p, authp->data, authp->length); |
| 950 | p+= authp->length; |
| 951 | n+= authp->length + 2; |
| 952 | |
| 953 | free(authp->data); |
| 954 | authp->data = NULL; |
| 955 | authp->length = 0; |
| 956 | } |
| 957 | else |
| 958 | { |
| 959 | s2n(0,p);/* null authenticator length */ |
| 960 | n+=2; |
| 961 | } |
| 962 | |
| 963 | if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0) |
| 964 | goto err; |
| 965 | |
| 966 | /* 20010420 VRS. Tried it this way; failed. |
| 967 | ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); |
| 968 | ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, |
| 969 | ** kssl_ctx->length); |
| 970 | ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); |
| 971 | */ |
| 972 | |
| 973 | memset(iv, 0, sizeof iv); /* per RFC 1510 */ |
| 974 | EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, |
| 975 | kssl_ctx->key,iv); |
| 976 | EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, |
| 977 | sizeof tmp_buf); |
| 978 | EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); |
| 979 | outl += padl; |
| 980 | if (outl > (int)sizeof epms) |
| 981 | { |
| 982 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
| 983 | goto err; |
| 984 | } |
| 985 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); |
| 986 | |
| 987 | /* KerberosWrapper.EncryptedPreMasterSecret */ |
| 988 | s2n(outl,p); |
| 989 | memcpy(p, epms, outl); |
| 990 | p+=outl; |
| 991 | n+=outl + 2; |
| 992 | |
| 993 | s->session->master_key_length= |
| 994 | s->method->ssl3_enc->generate_master_secret(s, |
| 995 | s->session->master_key, |
| 996 | tmp_buf, sizeof tmp_buf); |
| 997 | |
| 998 | OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); |
| 999 | OPENSSL_cleanse(epms, outl); |
| 1000 | } |
| 1001 | #endif |
| 1002 | #ifndef OPENSSL_NO_DH |
| 1003 | else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) |
| 1004 | { |
| 1005 | DH *dh_srvr,*dh_clnt; |
| 1006 | |
| 1007 | if (s->session->sess_cert->peer_dh_tmp != NULL) |
| 1008 | dh_srvr=s->session->sess_cert->peer_dh_tmp; |
| 1009 | else |
| 1010 | { |
| 1011 | /* we get them from the cert */ |
| 1012 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); |
| 1013 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); |
| 1014 | goto err; |
| 1015 | } |
| 1016 | |
| 1017 | /* generate a new random key */ |
| 1018 | if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) |
| 1019 | { |
| 1020 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); |
| 1021 | goto err; |
| 1022 | } |
| 1023 | if (!DH_generate_key(dh_clnt)) |
| 1024 | { |
| 1025 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); |
| 1026 | goto err; |
| 1027 | } |
| 1028 | |
| 1029 | /* use the 'p' output buffer for the DH key, but |
| 1030 | * make sure to clear it out afterwards */ |
| 1031 | |
| 1032 | n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); |
| 1033 | |
| 1034 | if (n <= 0) |
| 1035 | { |
| 1036 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); |
| 1037 | goto err; |
| 1038 | } |
| 1039 | |
| 1040 | /* generate master key from the result */ |
| 1041 | s->session->master_key_length= |
| 1042 | s->method->ssl3_enc->generate_master_secret(s, |
| 1043 | s->session->master_key,p,n); |
| 1044 | /* clean up */ |
| 1045 | memset(p,0,n); |
| 1046 | |
| 1047 | /* send off the data */ |
| 1048 | n=BN_num_bytes(dh_clnt->pub_key); |
| 1049 | s2n(n,p); |
| 1050 | BN_bn2bin(dh_clnt->pub_key,p); |
| 1051 | n+=2; |
| 1052 | |
| 1053 | DH_free(dh_clnt); |
| 1054 | |
| 1055 | /* perhaps clean things up a bit EAY EAY EAY EAY*/ |
| 1056 | } |
| 1057 | #endif |
| 1058 | #ifndef OPENSSL_NO_ECDH |
| 1059 | else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) |
| 1060 | { |
| 1061 | const EC_GROUP *srvr_group = NULL; |
| 1062 | EC_KEY *tkey; |
| 1063 | int ecdh_clnt_cert = 0; |
| 1064 | int field_size = 0; |
| 1065 | |
| 1066 | /* Did we send out the client's |
| 1067 | * ECDH share for use in premaster |
| 1068 | * computation as part of client certificate? |
| 1069 | * If so, set ecdh_clnt_cert to 1. |
| 1070 | */ |
| 1071 | if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) |
| 1072 | { |
| 1073 | /* XXX: For now, we do not support client |
| 1074 | * authentication using ECDH certificates. |
| 1075 | * To add such support, one needs to add |
| 1076 | * code that checks for appropriate |
| 1077 | * conditions and sets ecdh_clnt_cert to 1. |
| 1078 | * For example, the cert have an ECC |
| 1079 | * key on the same curve as the server's |
| 1080 | * and the key should be authorized for |
| 1081 | * key agreement. |
| 1082 | * |
| 1083 | * One also needs to add code in ssl3_connect |
| 1084 | * to skip sending the certificate verify |
| 1085 | * message. |
| 1086 | * |
| 1087 | * if ((s->cert->key->privatekey != NULL) && |
| 1088 | * (s->cert->key->privatekey->type == |
| 1089 | * EVP_PKEY_EC) && ...) |
| 1090 | * ecdh_clnt_cert = 1; |
| 1091 | */ |
| 1092 | } |
| 1093 | |
| 1094 | if (s->session->sess_cert->peer_ecdh_tmp != NULL) |
| 1095 | { |
| 1096 | tkey = s->session->sess_cert->peer_ecdh_tmp; |
| 1097 | } |
| 1098 | else |
| 1099 | { |
| 1100 | /* Get the Server Public Key from Cert */ |
| 1101 | srvr_pub_pkey = X509_get_pubkey(s->session-> \ |
| 1102 | sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); |
| 1103 | if ((srvr_pub_pkey == NULL) || |
| 1104 | (srvr_pub_pkey->type != EVP_PKEY_EC) || |
| 1105 | (srvr_pub_pkey->pkey.ec == NULL)) |
| 1106 | { |
| 1107 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1108 | ERR_R_INTERNAL_ERROR); |
| 1109 | goto err; |
| 1110 | } |
| 1111 | |
| 1112 | tkey = srvr_pub_pkey->pkey.ec; |
| 1113 | } |
| 1114 | |
| 1115 | srvr_group = EC_KEY_get0_group(tkey); |
| 1116 | srvr_ecpoint = EC_KEY_get0_public_key(tkey); |
| 1117 | |
| 1118 | if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) |
| 1119 | { |
| 1120 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1121 | ERR_R_INTERNAL_ERROR); |
| 1122 | goto err; |
| 1123 | } |
| 1124 | |
| 1125 | if ((clnt_ecdh=EC_KEY_new()) == NULL) |
| 1126 | { |
| 1127 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); |
| 1128 | goto err; |
| 1129 | } |
| 1130 | |
| 1131 | if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) |
| 1132 | { |
| 1133 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); |
| 1134 | goto err; |
| 1135 | } |
| 1136 | if (ecdh_clnt_cert) |
| 1137 | { |
| 1138 | /* Reuse key info from our certificate |
| 1139 | * We only need our private key to perform |
| 1140 | * the ECDH computation. |
| 1141 | */ |
| 1142 | const BIGNUM *priv_key; |
| 1143 | tkey = s->cert->key->privatekey->pkey.ec; |
| 1144 | priv_key = EC_KEY_get0_private_key(tkey); |
| 1145 | if (priv_key == NULL) |
| 1146 | { |
| 1147 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); |
| 1148 | goto err; |
| 1149 | } |
| 1150 | if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) |
| 1151 | { |
| 1152 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); |
| 1153 | goto err; |
| 1154 | } |
| 1155 | } |
| 1156 | else |
| 1157 | { |
| 1158 | /* Generate a new ECDH key pair */ |
| 1159 | if (!(EC_KEY_generate_key(clnt_ecdh))) |
| 1160 | { |
| 1161 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); |
| 1162 | goto err; |
| 1163 | } |
| 1164 | } |
| 1165 | |
| 1166 | /* use the 'p' output buffer for the ECDH key, but |
| 1167 | * make sure to clear it out afterwards |
| 1168 | */ |
| 1169 | |
| 1170 | field_size = EC_GROUP_get_degree(srvr_group); |
| 1171 | if (field_size <= 0) |
| 1172 | { |
| 1173 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1174 | ERR_R_ECDH_LIB); |
| 1175 | goto err; |
| 1176 | } |
| 1177 | n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); |
| 1178 | if (n <= 0) |
| 1179 | { |
| 1180 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1181 | ERR_R_ECDH_LIB); |
| 1182 | goto err; |
| 1183 | } |
| 1184 | |
| 1185 | /* generate master key from the result */ |
| 1186 | s->session->master_key_length = s->method->ssl3_enc \ |
| 1187 | -> generate_master_secret(s, |
| 1188 | s->session->master_key, |
| 1189 | p, n); |
| 1190 | |
| 1191 | memset(p, 0, n); /* clean up */ |
| 1192 | |
| 1193 | if (ecdh_clnt_cert) |
| 1194 | { |
| 1195 | /* Send empty client key exch message */ |
| 1196 | n = 0; |
| 1197 | } |
| 1198 | else |
| 1199 | { |
| 1200 | /* First check the size of encoding and |
| 1201 | * allocate memory accordingly. |
| 1202 | */ |
| 1203 | encoded_pt_len = |
| 1204 | EC_POINT_point2oct(srvr_group, |
| 1205 | EC_KEY_get0_public_key(clnt_ecdh), |
| 1206 | POINT_CONVERSION_UNCOMPRESSED, |
| 1207 | NULL, 0, NULL); |
| 1208 | |
| 1209 | encodedPoint = (unsigned char *) |
| 1210 | OPENSSL_malloc(encoded_pt_len * |
| 1211 | sizeof(unsigned char)); |
| 1212 | bn_ctx = BN_CTX_new(); |
| 1213 | if ((encodedPoint == NULL) || |
| 1214 | (bn_ctx == NULL)) |
| 1215 | { |
| 1216 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); |
| 1217 | goto err; |
| 1218 | } |
| 1219 | |
| 1220 | /* Encode the public key */ |
| 1221 | n = EC_POINT_point2oct(srvr_group, |
| 1222 | EC_KEY_get0_public_key(clnt_ecdh), |
| 1223 | POINT_CONVERSION_UNCOMPRESSED, |
| 1224 | encodedPoint, encoded_pt_len, bn_ctx); |
| 1225 | |
| 1226 | *p = n; /* length of encoded point */ |
| 1227 | /* Encoded point will be copied here */ |
| 1228 | p += 1; |
| 1229 | /* copy the point */ |
| 1230 | memcpy((unsigned char *)p, encodedPoint, n); |
| 1231 | /* increment n to account for length field */ |
| 1232 | n += 1; |
| 1233 | } |
| 1234 | |
| 1235 | /* Free allocated memory */ |
| 1236 | BN_CTX_free(bn_ctx); |
| 1237 | if (encodedPoint != NULL) OPENSSL_free(encodedPoint); |
| 1238 | if (clnt_ecdh != NULL) |
| 1239 | EC_KEY_free(clnt_ecdh); |
| 1240 | EVP_PKEY_free(srvr_pub_pkey); |
| 1241 | } |
| 1242 | #endif /* !OPENSSL_NO_ECDH */ |
| 1243 | |
| 1244 | #ifndef OPENSSL_NO_PSK |
| 1245 | else if (alg_k & SSL_kPSK) |
| 1246 | { |
| 1247 | char identity[PSK_MAX_IDENTITY_LEN]; |
| 1248 | unsigned char *t = NULL; |
| 1249 | unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; |
| 1250 | unsigned int pre_ms_len = 0, psk_len = 0; |
| 1251 | int psk_err = 1; |
| 1252 | |
| 1253 | n = 0; |
| 1254 | if (s->psk_client_callback == NULL) |
| 1255 | { |
| 1256 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1257 | SSL_R_PSK_NO_CLIENT_CB); |
| 1258 | goto err; |
| 1259 | } |
| 1260 | |
| 1261 | psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, |
| 1262 | identity, PSK_MAX_IDENTITY_LEN, |
| 1263 | psk_or_pre_ms, sizeof(psk_or_pre_ms)); |
| 1264 | if (psk_len > PSK_MAX_PSK_LEN) |
| 1265 | { |
| 1266 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1267 | ERR_R_INTERNAL_ERROR); |
| 1268 | goto psk_err; |
| 1269 | } |
| 1270 | else if (psk_len == 0) |
| 1271 | { |
| 1272 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1273 | SSL_R_PSK_IDENTITY_NOT_FOUND); |
| 1274 | goto psk_err; |
| 1275 | } |
| 1276 | |
| 1277 | /* create PSK pre_master_secret */ |
| 1278 | pre_ms_len = 2+psk_len+2+psk_len; |
| 1279 | t = psk_or_pre_ms; |
| 1280 | memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); |
| 1281 | s2n(psk_len, t); |
| 1282 | memset(t, 0, psk_len); |
| 1283 | t+=psk_len; |
| 1284 | s2n(psk_len, t); |
| 1285 | |
| 1286 | if (s->session->psk_identity_hint != NULL) |
| 1287 | OPENSSL_free(s->session->psk_identity_hint); |
| 1288 | s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); |
| 1289 | if (s->ctx->psk_identity_hint != NULL && |
| 1290 | s->session->psk_identity_hint == NULL) |
| 1291 | { |
| 1292 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1293 | ERR_R_MALLOC_FAILURE); |
| 1294 | goto psk_err; |
| 1295 | } |
| 1296 | |
| 1297 | if (s->session->psk_identity != NULL) |
| 1298 | OPENSSL_free(s->session->psk_identity); |
| 1299 | s->session->psk_identity = BUF_strdup(identity); |
| 1300 | if (s->session->psk_identity == NULL) |
| 1301 | { |
| 1302 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, |
| 1303 | ERR_R_MALLOC_FAILURE); |
| 1304 | goto psk_err; |
| 1305 | } |
| 1306 | |
| 1307 | s->session->master_key_length = |
| 1308 | s->method->ssl3_enc->generate_master_secret(s, |
| 1309 | s->session->master_key, |
| 1310 | psk_or_pre_ms, pre_ms_len); |
| 1311 | n = strlen(identity); |
| 1312 | s2n(n, p); |
| 1313 | memcpy(p, identity, n); |
| 1314 | n+=2; |
| 1315 | psk_err = 0; |
| 1316 | psk_err: |
| 1317 | OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); |
| 1318 | OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); |
| 1319 | if (psk_err != 0) |
| 1320 | { |
| 1321 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
| 1322 | goto err; |
| 1323 | } |
| 1324 | } |
| 1325 | #endif |
| 1326 | else |
| 1327 | { |
| 1328 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); |
| 1329 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); |
| 1330 | goto err; |
| 1331 | } |
| 1332 | |
| 1333 | d = dtls1_set_message_header(s, d, |
| 1334 | SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n); |
| 1335 | /* |
| 1336 | *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; |
| 1337 | l2n3(n,d); |
| 1338 | l2n(s->d1->handshake_write_seq,d); |
| 1339 | s->d1->handshake_write_seq++; |
| 1340 | */ |
| 1341 | |
| 1342 | s->state=SSL3_ST_CW_KEY_EXCH_B; |
| 1343 | /* number of bytes to write */ |
| 1344 | s->init_num=n+DTLS1_HM_HEADER_LENGTH; |
| 1345 | s->init_off=0; |
| 1346 | |
| 1347 | /* buffer the message to handle re-xmits */ |
| 1348 | dtls1_buffer_message(s, 0); |
| 1349 | } |
| 1350 | |
| 1351 | /* SSL3_ST_CW_KEY_EXCH_B */ |
| 1352 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); |
| 1353 | err: |
| 1354 | #ifndef OPENSSL_NO_ECDH |
| 1355 | BN_CTX_free(bn_ctx); |
| 1356 | if (encodedPoint != NULL) OPENSSL_free(encodedPoint); |
| 1357 | if (clnt_ecdh != NULL) |
| 1358 | EC_KEY_free(clnt_ecdh); |
| 1359 | EVP_PKEY_free(srvr_pub_pkey); |
| 1360 | #endif |
| 1361 | return(-1); |
| 1362 | } |
| 1363 | |
| 1364 | int dtls1_send_client_verify(SSL *s) |
| 1365 | { |
| 1366 | unsigned char *p,*d; |
| 1367 | unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; |
| 1368 | EVP_PKEY *pkey; |
| 1369 | #ifndef OPENSSL_NO_RSA |
| 1370 | unsigned u=0; |
| 1371 | #endif |
| 1372 | unsigned long n; |
| 1373 | #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA) |
| 1374 | int j; |
| 1375 | #endif |
| 1376 | |
| 1377 | if (s->state == SSL3_ST_CW_CERT_VRFY_A) |
| 1378 | { |
| 1379 | d=(unsigned char *)s->init_buf->data; |
| 1380 | p= &(d[DTLS1_HM_HEADER_LENGTH]); |
| 1381 | pkey=s->cert->key->privatekey; |
| 1382 | |
| 1383 | s->method->ssl3_enc->cert_verify_mac(s, |
| 1384 | NID_sha1, |
| 1385 | &(data[MD5_DIGEST_LENGTH])); |
| 1386 | |
| 1387 | #ifndef OPENSSL_NO_RSA |
| 1388 | if (pkey->type == EVP_PKEY_RSA) |
| 1389 | { |
| 1390 | s->method->ssl3_enc->cert_verify_mac(s, |
| 1391 | NID_md5, |
| 1392 | &(data[0])); |
| 1393 | if (RSA_sign(NID_md5_sha1, data, |
| 1394 | MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, |
| 1395 | &(p[2]), &u, pkey->pkey.rsa) <= 0 ) |
| 1396 | { |
| 1397 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); |
| 1398 | goto err; |
| 1399 | } |
| 1400 | s2n(u,p); |
| 1401 | n=u+2; |
| 1402 | } |
| 1403 | else |
| 1404 | #endif |
| 1405 | #ifndef OPENSSL_NO_DSA |
| 1406 | if (pkey->type == EVP_PKEY_DSA) |
| 1407 | { |
| 1408 | if (!DSA_sign(pkey->save_type, |
| 1409 | &(data[MD5_DIGEST_LENGTH]), |
| 1410 | SHA_DIGEST_LENGTH,&(p[2]), |
| 1411 | (unsigned int *)&j,pkey->pkey.dsa)) |
| 1412 | { |
| 1413 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); |
| 1414 | goto err; |
| 1415 | } |
| 1416 | s2n(j,p); |
| 1417 | n=j+2; |
| 1418 | } |
| 1419 | else |
| 1420 | #endif |
| 1421 | #ifndef OPENSSL_NO_ECDSA |
| 1422 | if (pkey->type == EVP_PKEY_EC) |
| 1423 | { |
| 1424 | if (!ECDSA_sign(pkey->save_type, |
| 1425 | &(data[MD5_DIGEST_LENGTH]), |
| 1426 | SHA_DIGEST_LENGTH,&(p[2]), |
| 1427 | (unsigned int *)&j,pkey->pkey.ec)) |
| 1428 | { |
| 1429 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY, |
| 1430 | ERR_R_ECDSA_LIB); |
| 1431 | goto err; |
| 1432 | } |
| 1433 | s2n(j,p); |
| 1434 | n=j+2; |
| 1435 | } |
| 1436 | else |
| 1437 | #endif |
| 1438 | { |
| 1439 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); |
| 1440 | goto err; |
| 1441 | } |
| 1442 | |
| 1443 | d = dtls1_set_message_header(s, d, |
| 1444 | SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ; |
| 1445 | |
| 1446 | s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH; |
| 1447 | s->init_off=0; |
| 1448 | |
| 1449 | /* buffer the message to handle re-xmits */ |
| 1450 | dtls1_buffer_message(s, 0); |
| 1451 | |
| 1452 | s->state = SSL3_ST_CW_CERT_VRFY_B; |
| 1453 | } |
| 1454 | |
| 1455 | /* s->state = SSL3_ST_CW_CERT_VRFY_B */ |
| 1456 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); |
| 1457 | err: |
| 1458 | return(-1); |
| 1459 | } |
| 1460 | |
| 1461 | int dtls1_send_client_certificate(SSL *s) |
| 1462 | { |
| 1463 | X509 *x509=NULL; |
| 1464 | EVP_PKEY *pkey=NULL; |
| 1465 | int i; |
| 1466 | unsigned long l; |
| 1467 | |
| 1468 | if (s->state == SSL3_ST_CW_CERT_A) |
| 1469 | { |
| 1470 | if ((s->cert == NULL) || |
| 1471 | (s->cert->key->x509 == NULL) || |
| 1472 | (s->cert->key->privatekey == NULL)) |
| 1473 | s->state=SSL3_ST_CW_CERT_B; |
| 1474 | else |
| 1475 | s->state=SSL3_ST_CW_CERT_C; |
| 1476 | } |
| 1477 | |
| 1478 | /* We need to get a client cert */ |
| 1479 | if (s->state == SSL3_ST_CW_CERT_B) |
| 1480 | { |
| 1481 | /* If we get an error, we need to |
| 1482 | * ssl->rwstate=SSL_X509_LOOKUP; return(-1); |
| 1483 | * We then get retied later */ |
| 1484 | i=0; |
| 1485 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
| 1486 | if (i < 0) |
| 1487 | { |
| 1488 | s->rwstate=SSL_X509_LOOKUP; |
| 1489 | return(-1); |
| 1490 | } |
| 1491 | s->rwstate=SSL_NOTHING; |
| 1492 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) |
| 1493 | { |
| 1494 | s->state=SSL3_ST_CW_CERT_B; |
| 1495 | if ( !SSL_use_certificate(s,x509) || |
| 1496 | !SSL_use_PrivateKey(s,pkey)) |
| 1497 | i=0; |
| 1498 | } |
| 1499 | else if (i == 1) |
| 1500 | { |
| 1501 | i=0; |
| 1502 | SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
| 1503 | } |
| 1504 | |
| 1505 | if (x509 != NULL) X509_free(x509); |
| 1506 | if (pkey != NULL) EVP_PKEY_free(pkey); |
| 1507 | if (i == 0) |
| 1508 | { |
| 1509 | if (s->version == SSL3_VERSION) |
| 1510 | { |
| 1511 | s->s3->tmp.cert_req=0; |
| 1512 | ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); |
| 1513 | return(1); |
| 1514 | } |
| 1515 | else |
| 1516 | { |
| 1517 | s->s3->tmp.cert_req=2; |
| 1518 | } |
| 1519 | } |
| 1520 | |
| 1521 | /* Ok, we have a cert */ |
| 1522 | s->state=SSL3_ST_CW_CERT_C; |
| 1523 | } |
| 1524 | |
| 1525 | if (s->state == SSL3_ST_CW_CERT_C) |
| 1526 | { |
| 1527 | s->state=SSL3_ST_CW_CERT_D; |
| 1528 | l=dtls1_output_cert_chain(s, |
| 1529 | (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); |
| 1530 | s->init_num=(int)l; |
| 1531 | s->init_off=0; |
| 1532 | |
| 1533 | /* set header called by dtls1_output_cert_chain() */ |
| 1534 | |
| 1535 | /* buffer the message to handle re-xmits */ |
| 1536 | dtls1_buffer_message(s, 0); |
| 1537 | } |
| 1538 | /* SSL3_ST_CW_CERT_D */ |
| 1539 | return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); |
| 1540 | } |
| 1541 | |
| 1542 | |