Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1 | /* ssl/s3_clnt.c */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This package is an SSL implementation written |
| 6 | * by Eric Young (eay@cryptsoft.com). |
| 7 | * The implementation was written so as to conform with Netscapes SSL. |
| 8 | * |
| 9 | * This library is free for commercial and non-commercial use as long as |
| 10 | * the following conditions are aheared to. The following conditions |
| 11 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 13 | * included with this distribution is covered by the same copyright terms |
| 14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 15 | * |
| 16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 17 | * the code are not to be removed. |
| 18 | * If this package is used in a product, Eric Young should be given attribution |
| 19 | * as the author of the parts of the library used. |
| 20 | * This can be in the form of a textual message at program startup or |
| 21 | * in documentation (online or textual) provided with the package. |
| 22 | * |
| 23 | * Redistribution and use in source and binary forms, with or without |
| 24 | * modification, are permitted provided that the following conditions |
| 25 | * are met: |
| 26 | * 1. Redistributions of source code must retain the copyright |
| 27 | * notice, this list of conditions and the following disclaimer. |
| 28 | * 2. Redistributions in binary form must reproduce the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer in the |
| 30 | * documentation and/or other materials provided with the distribution. |
| 31 | * 3. All advertising materials mentioning features or use of this software |
| 32 | * must display the following acknowledgement: |
| 33 | * "This product includes cryptographic software written by |
| 34 | * Eric Young (eay@cryptsoft.com)" |
| 35 | * The word 'cryptographic' can be left out if the rouines from the library |
| 36 | * being used are not cryptographic related :-). |
| 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 38 | * the apps directory (application code) you must include an acknowledgement: |
| 39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 40 | * |
| 41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 51 | * SUCH DAMAGE. |
| 52 | * |
| 53 | * The licence and distribution terms for any publically available version or |
| 54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 55 | * copied and put under another distribution licence |
| 56 | * [including the GNU Public Licence.] |
| 57 | */ |
| 58 | /* ==================================================================== |
| 59 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
| 60 | * |
| 61 | * Redistribution and use in source and binary forms, with or without |
| 62 | * modification, are permitted provided that the following conditions |
| 63 | * are met: |
| 64 | * |
| 65 | * 1. Redistributions of source code must retain the above copyright |
| 66 | * notice, this list of conditions and the following disclaimer. |
| 67 | * |
| 68 | * 2. Redistributions in binary form must reproduce the above copyright |
| 69 | * notice, this list of conditions and the following disclaimer in |
| 70 | * the documentation and/or other materials provided with the |
| 71 | * distribution. |
| 72 | * |
| 73 | * 3. All advertising materials mentioning features or use of this |
| 74 | * software must display the following acknowledgment: |
| 75 | * "This product includes software developed by the OpenSSL Project |
| 76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| 77 | * |
| 78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 79 | * endorse or promote products derived from this software without |
| 80 | * prior written permission. For written permission, please contact |
| 81 | * openssl-core@openssl.org. |
| 82 | * |
| 83 | * 5. Products derived from this software may not be called "OpenSSL" |
| 84 | * nor may "OpenSSL" appear in their names without prior written |
| 85 | * permission of the OpenSSL Project. |
| 86 | * |
| 87 | * 6. Redistributions of any form whatsoever must retain the following |
| 88 | * acknowledgment: |
| 89 | * "This product includes software developed by the OpenSSL Project |
| 90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 91 | * |
| 92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 103 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 104 | * ==================================================================== |
| 105 | * |
| 106 | * This product includes cryptographic software written by Eric Young |
| 107 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 108 | * Hudson (tjh@cryptsoft.com). |
| 109 | * |
| 110 | */ |
| 111 | /* ==================================================================== |
| 112 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
| 113 | * |
| 114 | * Portions of the attached software ("Contribution") are developed by |
| 115 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
| 116 | * |
| 117 | * The Contribution is licensed pursuant to the OpenSSL open source |
| 118 | * license provided above. |
| 119 | * |
| 120 | * ECC cipher suite support in OpenSSL originally written by |
| 121 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. |
| 122 | * |
| 123 | */ |
| 124 | /* ==================================================================== |
| 125 | * Copyright 2005 Nokia. All rights reserved. |
| 126 | * |
| 127 | * The portions of the attached software ("Contribution") is developed by |
| 128 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source |
| 129 | * license. |
| 130 | * |
| 131 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of |
| 132 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites |
| 133 | * support (see RFC 4279) to OpenSSL. |
| 134 | * |
| 135 | * No patent licenses or other rights except those expressly stated in |
| 136 | * the OpenSSL open source license shall be deemed granted or received |
| 137 | * expressly, by implication, estoppel, or otherwise. |
| 138 | * |
| 139 | * No assurances are provided by Nokia that the Contribution does not |
| 140 | * infringe the patent or other intellectual property rights of any third |
| 141 | * party or that the license provides you with all the necessary rights |
| 142 | * to make use of the Contribution. |
| 143 | * |
| 144 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN |
| 145 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA |
| 146 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY |
| 147 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR |
| 148 | * OTHERWISE. |
| 149 | */ |
| 150 | |
| 151 | #include <stdio.h> |
| 152 | |
| 153 | #include <openssl/buf.h> |
David Benjamin | 0397309 | 2014-06-24 23:27:17 -0400 | [diff] [blame] | 154 | #include <openssl/bytestring.h> |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 155 | #include <openssl/rand.h> |
| 156 | #include <openssl/obj.h> |
| 157 | #include <openssl/evp.h> |
| 158 | #include <openssl/mem.h> |
| 159 | #include <openssl/md5.h> |
| 160 | #include <openssl/dh.h> |
| 161 | #include <openssl/bn.h> |
| 162 | #include <openssl/engine.h> |
| 163 | #include <openssl/x509.h> |
| 164 | |
| 165 | #include "ssl_locl.h" |
| 166 | #include "../crypto/dh/internal.h" |
| 167 | |
| 168 | static const SSL_METHOD *ssl3_get_client_method(int ver); |
| 169 | |
| 170 | static const SSL_METHOD *ssl3_get_client_method(int ver) |
| 171 | { |
| 172 | if (ver == SSL3_VERSION) |
| 173 | return(SSLv3_client_method()); |
| 174 | else |
| 175 | return(NULL); |
| 176 | } |
| 177 | |
| 178 | IMPLEMENT_ssl3_meth_func(SSLv3_client_method, |
| 179 | ssl_undefined_function, |
| 180 | ssl3_connect, |
| 181 | ssl3_get_client_method) |
| 182 | |
| 183 | int ssl3_connect(SSL *s) |
| 184 | { |
| 185 | BUF_MEM *buf=NULL; |
| 186 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
| 187 | int ret= -1; |
| 188 | int new_state,state,skip=0; |
| 189 | |
| 190 | ERR_clear_error(); |
| 191 | ERR_clear_system_error(); |
| 192 | |
| 193 | if (s->info_callback != NULL) |
| 194 | cb=s->info_callback; |
| 195 | else if (s->ctx->info_callback != NULL) |
| 196 | cb=s->ctx->info_callback; |
| 197 | |
| 198 | s->in_handshake++; |
| 199 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
| 200 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 201 | for (;;) |
| 202 | { |
| 203 | state=s->state; |
| 204 | |
| 205 | switch(s->state) |
| 206 | { |
| 207 | case SSL_ST_RENEGOTIATE: |
| 208 | s->renegotiate=1; |
| 209 | s->state=SSL_ST_CONNECT; |
| 210 | s->ctx->stats.sess_connect_renegotiate++; |
| 211 | /* break */ |
| 212 | case SSL_ST_BEFORE: |
| 213 | case SSL_ST_CONNECT: |
| 214 | case SSL_ST_BEFORE|SSL_ST_CONNECT: |
| 215 | case SSL_ST_OK|SSL_ST_CONNECT: |
| 216 | |
| 217 | s->server=0; |
| 218 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
| 219 | |
| 220 | if ((s->version & 0xff00 ) != 0x0300) |
| 221 | { |
| 222 | OPENSSL_PUT_ERROR(SSL, ssl3_connect, ERR_R_INTERNAL_ERROR); |
| 223 | ret = -1; |
| 224 | goto end; |
| 225 | } |
| 226 | |
| 227 | /* s->version=SSL3_VERSION; */ |
| 228 | s->type=SSL_ST_CONNECT; |
| 229 | |
| 230 | if (s->init_buf == NULL) |
| 231 | { |
| 232 | if ((buf=BUF_MEM_new()) == NULL) |
| 233 | { |
| 234 | ret= -1; |
| 235 | goto end; |
| 236 | } |
| 237 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) |
| 238 | { |
| 239 | ret= -1; |
| 240 | goto end; |
| 241 | } |
| 242 | s->init_buf=buf; |
| 243 | buf=NULL; |
| 244 | } |
| 245 | |
| 246 | if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } |
| 247 | |
| 248 | /* setup buffing BIO */ |
| 249 | if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } |
| 250 | |
| 251 | /* don't push the buffering BIO quite yet */ |
| 252 | |
| 253 | ssl3_init_finished_mac(s); |
| 254 | |
| 255 | s->state=SSL3_ST_CW_CLNT_HELLO_A; |
| 256 | s->ctx->stats.sess_connect++; |
| 257 | s->init_num=0; |
| 258 | break; |
| 259 | |
| 260 | case SSL3_ST_CW_CLNT_HELLO_A: |
| 261 | case SSL3_ST_CW_CLNT_HELLO_B: |
| 262 | |
| 263 | s->shutdown=0; |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 264 | ret=ssl3_send_client_hello(s); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 265 | if (ret <= 0) goto end; |
| 266 | s->state=SSL3_ST_CR_SRVR_HELLO_A; |
| 267 | s->init_num=0; |
| 268 | |
| 269 | /* turn on buffering for the next lot of output */ |
| 270 | if (s->bbio != s->wbio) |
| 271 | s->wbio=BIO_push(s->bbio,s->wbio); |
| 272 | |
| 273 | break; |
| 274 | |
| 275 | case SSL3_ST_CR_SRVR_HELLO_A: |
| 276 | case SSL3_ST_CR_SRVR_HELLO_B: |
| 277 | ret=ssl3_get_server_hello(s); |
| 278 | if (ret <= 0) goto end; |
| 279 | |
| 280 | if (s->hit) |
| 281 | { |
David Benjamin | cb5abad | 2014-07-25 12:14:28 -0400 | [diff] [blame] | 282 | s->state=SSL3_ST_CR_CHANGE; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 283 | if (s->tlsext_ticket_expected) |
| 284 | { |
| 285 | /* receive renewed session ticket */ |
| 286 | s->state=SSL3_ST_CR_SESSION_TICKET_A; |
| 287 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 288 | } |
| 289 | else |
| 290 | { |
David Benjamin | 2b0aeec | 2014-07-01 00:39:02 -0400 | [diff] [blame] | 291 | s->state=SSL3_ST_CR_CERT_A; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 292 | } |
| 293 | s->init_num=0; |
| 294 | break; |
David Benjamin | 2b0aeec | 2014-07-01 00:39:02 -0400 | [diff] [blame] | 295 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 296 | case SSL3_ST_CR_CERT_A: |
| 297 | case SSL3_ST_CR_CERT_B: |
David Benjamin | e8f3d66 | 2014-07-12 01:10:19 -0400 | [diff] [blame] | 298 | if (ssl_cipher_has_server_public_key(s->s3->tmp.new_cipher)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 299 | { |
| 300 | ret=ssl3_get_server_certificate(s); |
| 301 | if (ret <= 0) goto end; |
David Benjamin | 6c7aed0 | 2014-08-27 16:42:38 -0400 | [diff] [blame] | 302 | if (s->s3->tmp.certificate_status_expected) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 303 | s->state=SSL3_ST_CR_CERT_STATUS_A; |
| 304 | else |
| 305 | s->state=SSL3_ST_CR_KEY_EXCH_A; |
| 306 | } |
| 307 | else |
| 308 | { |
| 309 | skip = 1; |
| 310 | s->state=SSL3_ST_CR_KEY_EXCH_A; |
| 311 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 312 | s->init_num=0; |
| 313 | break; |
| 314 | |
| 315 | case SSL3_ST_CR_KEY_EXCH_A: |
| 316 | case SSL3_ST_CR_KEY_EXCH_B: |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 317 | ret=ssl3_get_server_key_exchange(s); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 318 | if (ret <= 0) goto end; |
| 319 | s->state=SSL3_ST_CR_CERT_REQ_A; |
| 320 | s->init_num=0; |
| 321 | |
| 322 | /* at this point we check that we have the |
| 323 | * required stuff from the server */ |
| 324 | if (!ssl3_check_cert_and_algorithm(s)) |
| 325 | { |
| 326 | ret= -1; |
| 327 | goto end; |
| 328 | } |
| 329 | break; |
| 330 | |
| 331 | case SSL3_ST_CR_CERT_REQ_A: |
| 332 | case SSL3_ST_CR_CERT_REQ_B: |
| 333 | ret=ssl3_get_certificate_request(s); |
| 334 | if (ret <= 0) goto end; |
| 335 | s->state=SSL3_ST_CR_SRVR_DONE_A; |
| 336 | s->init_num=0; |
| 337 | break; |
| 338 | |
| 339 | case SSL3_ST_CR_SRVR_DONE_A: |
| 340 | case SSL3_ST_CR_SRVR_DONE_B: |
| 341 | ret=ssl3_get_server_done(s); |
| 342 | if (ret <= 0) goto end; |
| 343 | if (s->s3->tmp.cert_req) |
| 344 | s->state=SSL3_ST_CW_CERT_A; |
| 345 | else |
| 346 | s->state=SSL3_ST_CW_KEY_EXCH_A; |
| 347 | s->init_num=0; |
| 348 | |
| 349 | break; |
| 350 | |
| 351 | case SSL3_ST_CW_CERT_A: |
| 352 | case SSL3_ST_CW_CERT_B: |
| 353 | case SSL3_ST_CW_CERT_C: |
| 354 | case SSL3_ST_CW_CERT_D: |
| 355 | ret=ssl3_send_client_certificate(s); |
| 356 | if (ret <= 0) goto end; |
| 357 | s->state=SSL3_ST_CW_KEY_EXCH_A; |
| 358 | s->init_num=0; |
| 359 | break; |
| 360 | |
| 361 | case SSL3_ST_CW_KEY_EXCH_A: |
| 362 | case SSL3_ST_CW_KEY_EXCH_B: |
| 363 | ret=ssl3_send_client_key_exchange(s); |
| 364 | if (ret <= 0) goto end; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 365 | /* For TLS, cert_req is set to 2, so a cert chain |
| 366 | * of nothing is sent, but no verify packet is sent */ |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 367 | if (s->s3->tmp.cert_req == 1) |
| 368 | { |
| 369 | s->state=SSL3_ST_CW_CERT_VRFY_A; |
| 370 | } |
| 371 | else |
| 372 | { |
| 373 | s->state=SSL3_ST_CW_CHANGE_A; |
| 374 | s->s3->change_cipher_spec=0; |
| 375 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 376 | |
| 377 | s->init_num=0; |
| 378 | break; |
| 379 | |
| 380 | case SSL3_ST_CW_CERT_VRFY_A: |
| 381 | case SSL3_ST_CW_CERT_VRFY_B: |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 382 | ret=ssl3_send_cert_verify(s); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 383 | if (ret <= 0) goto end; |
| 384 | s->state=SSL3_ST_CW_CHANGE_A; |
| 385 | s->init_num=0; |
| 386 | s->s3->change_cipher_spec=0; |
| 387 | break; |
| 388 | |
| 389 | case SSL3_ST_CW_CHANGE_A: |
| 390 | case SSL3_ST_CW_CHANGE_B: |
| 391 | ret=ssl3_send_change_cipher_spec(s, |
| 392 | SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); |
| 393 | if (ret <= 0) goto end; |
| 394 | |
Adam Langley | 1258b6a | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 395 | s->state=SSL3_ST_CW_FINISHED_A; |
Adam Langley | 1258b6a | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 396 | if (s->s3->tlsext_channel_id_valid) |
| 397 | s->state=SSL3_ST_CW_CHANNEL_ID_A; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 398 | if (s->s3->next_proto_neg_seen) |
| 399 | s->state=SSL3_ST_CW_NEXT_PROTO_A; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 400 | s->init_num=0; |
| 401 | |
| 402 | s->session->cipher=s->s3->tmp.new_cipher; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 403 | if (!s->method->ssl3_enc->setup_key_block(s)) |
| 404 | { |
| 405 | ret= -1; |
| 406 | goto end; |
| 407 | } |
| 408 | |
| 409 | if (!s->method->ssl3_enc->change_cipher_state(s, |
| 410 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) |
| 411 | { |
| 412 | ret= -1; |
| 413 | goto end; |
| 414 | } |
| 415 | |
| 416 | break; |
| 417 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 418 | case SSL3_ST_CW_NEXT_PROTO_A: |
| 419 | case SSL3_ST_CW_NEXT_PROTO_B: |
| 420 | ret=ssl3_send_next_proto(s); |
| 421 | if (ret <= 0) goto end; |
Adam Langley | 1258b6a | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 422 | if (s->s3->tlsext_channel_id_valid) |
| 423 | s->state=SSL3_ST_CW_CHANNEL_ID_A; |
| 424 | else |
| 425 | s->state=SSL3_ST_CW_FINISHED_A; |
| 426 | break; |
Adam Langley | 1258b6a | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 427 | |
Adam Langley | 1258b6a | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 428 | case SSL3_ST_CW_CHANNEL_ID_A: |
| 429 | case SSL3_ST_CW_CHANNEL_ID_B: |
| 430 | ret=ssl3_send_channel_id(s); |
| 431 | if (ret <= 0) goto end; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 432 | s->state=SSL3_ST_CW_FINISHED_A; |
| 433 | break; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 434 | |
| 435 | case SSL3_ST_CW_FINISHED_A: |
| 436 | case SSL3_ST_CW_FINISHED_B: |
| 437 | ret=ssl3_send_finished(s, |
| 438 | SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, |
| 439 | s->method->ssl3_enc->client_finished_label, |
| 440 | s->method->ssl3_enc->client_finished_label_len); |
| 441 | if (ret <= 0) goto end; |
| 442 | s->state=SSL3_ST_CW_FLUSH; |
| 443 | |
| 444 | /* clear flags */ |
| 445 | s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; |
| 446 | if (s->hit) |
| 447 | { |
| 448 | s->s3->tmp.next_state=SSL_ST_OK; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 449 | } |
| 450 | else |
| 451 | { |
Adam Langley | 1258b6a | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 452 | /* This is a non-resumption handshake. If it |
| 453 | * involves ChannelID, then record the |
| 454 | * handshake hashes at this point in the |
| 455 | * session so that any resumption of this |
| 456 | * session with ChannelID can sign those |
| 457 | * hashes. */ |
| 458 | if (s->s3->tlsext_channel_id_new) |
| 459 | { |
| 460 | ret = tls1_record_handshake_hashes_for_channel_id(s); |
| 461 | if (ret <= 0) |
| 462 | goto end; |
| 463 | } |
Adam Langley | adb739e | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 464 | if ((SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) |
| 465 | && ssl3_can_cutthrough(s) |
| 466 | && s->s3->previous_server_finished_len == 0 /* no cutthrough on renegotiation (would complicate the state machine) */ |
| 467 | ) |
| 468 | { |
Adam Langley | 045cc55 | 2014-07-16 10:45:57 -0700 | [diff] [blame] | 469 | s->s3->tmp.next_state=SSL3_ST_CUTTHROUGH_COMPLETE; |
Adam Langley | adb739e | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 470 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 471 | else |
Adam Langley | adb739e | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 472 | { |
Adam Langley | adb739e | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 473 | /* Allow NewSessionTicket if ticket expected */ |
| 474 | if (s->tlsext_ticket_expected) |
| 475 | s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; |
| 476 | else |
David Benjamin | cb5abad | 2014-07-25 12:14:28 -0400 | [diff] [blame] | 477 | s->s3->tmp.next_state=SSL3_ST_CR_CHANGE; |
Adam Langley | adb739e | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 478 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 479 | } |
| 480 | s->init_num=0; |
| 481 | break; |
| 482 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 483 | case SSL3_ST_CR_SESSION_TICKET_A: |
| 484 | case SSL3_ST_CR_SESSION_TICKET_B: |
| 485 | ret=ssl3_get_new_session_ticket(s); |
| 486 | if (ret <= 0) goto end; |
David Benjamin | cb5abad | 2014-07-25 12:14:28 -0400 | [diff] [blame] | 487 | s->state=SSL3_ST_CR_CHANGE; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 488 | s->init_num=0; |
| 489 | break; |
| 490 | |
| 491 | case SSL3_ST_CR_CERT_STATUS_A: |
| 492 | case SSL3_ST_CR_CERT_STATUS_B: |
| 493 | ret=ssl3_get_cert_status(s); |
| 494 | if (ret <= 0) goto end; |
| 495 | s->state=SSL3_ST_CR_KEY_EXCH_A; |
| 496 | s->init_num=0; |
| 497 | break; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 498 | |
David Benjamin | cb5abad | 2014-07-25 12:14:28 -0400 | [diff] [blame] | 499 | case SSL3_ST_CR_CHANGE: |
| 500 | /* At this point, the next message must be entirely |
| 501 | * behind a ChangeCipherSpec. */ |
David Benjamin | 86271ee | 2014-07-21 16:14:03 -0400 | [diff] [blame] | 502 | if (!ssl3_expect_change_cipher_spec(s)) |
| 503 | { |
| 504 | ret = -1; |
| 505 | goto end; |
| 506 | } |
David Benjamin | cb5abad | 2014-07-25 12:14:28 -0400 | [diff] [blame] | 507 | s->state = SSL3_ST_CR_FINISHED_A; |
| 508 | break; |
| 509 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 510 | case SSL3_ST_CR_FINISHED_A: |
| 511 | case SSL3_ST_CR_FINISHED_B: |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 512 | ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, |
| 513 | SSL3_ST_CR_FINISHED_B); |
| 514 | if (ret <= 0) goto end; |
| 515 | |
| 516 | if (s->hit) |
| 517 | s->state=SSL3_ST_CW_CHANGE_A; |
| 518 | else |
| 519 | s->state=SSL_ST_OK; |
| 520 | s->init_num=0; |
| 521 | break; |
| 522 | |
| 523 | case SSL3_ST_CW_FLUSH: |
| 524 | s->rwstate=SSL_WRITING; |
| 525 | if (BIO_flush(s->wbio) <= 0) |
| 526 | { |
| 527 | ret= -1; |
| 528 | goto end; |
| 529 | } |
| 530 | s->rwstate=SSL_NOTHING; |
| 531 | s->state=s->s3->tmp.next_state; |
| 532 | break; |
| 533 | |
Adam Langley | adb739e | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 534 | case SSL3_ST_CUTTHROUGH_COMPLETE: |
Adam Langley | adb739e | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 535 | /* Allow NewSessionTicket if ticket expected */ |
| 536 | if (s->tlsext_ticket_expected) |
| 537 | s->state=SSL3_ST_CR_SESSION_TICKET_A; |
| 538 | else |
David Benjamin | 7e3305e | 2014-07-28 14:52:32 -0400 | [diff] [blame] | 539 | s->state=SSL3_ST_CR_CHANGE; |
Adam Langley | adb739e | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 540 | |
Adam Langley | 045cc55 | 2014-07-16 10:45:57 -0700 | [diff] [blame] | 541 | ssl_free_wbio_buffer(s); |
Adam Langley | adb739e | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 542 | ret = 1; |
| 543 | goto end; |
| 544 | /* break; */ |
| 545 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 546 | case SSL_ST_OK: |
| 547 | /* clean a few things up */ |
| 548 | ssl3_cleanup_key_block(s); |
| 549 | |
| 550 | if (s->init_buf != NULL) |
| 551 | { |
| 552 | BUF_MEM_free(s->init_buf); |
| 553 | s->init_buf=NULL; |
| 554 | } |
| 555 | |
| 556 | /* If we are not 'joining' the last two packets, |
| 557 | * remove the buffering now */ |
| 558 | if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) |
| 559 | ssl_free_wbio_buffer(s); |
| 560 | /* else do it later in ssl3_write */ |
| 561 | |
| 562 | s->init_num=0; |
| 563 | s->renegotiate=0; |
| 564 | s->new_session=0; |
| 565 | |
| 566 | ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); |
| 567 | if (s->hit) s->ctx->stats.sess_hit++; |
| 568 | |
| 569 | ret=1; |
| 570 | /* s->server=0; */ |
| 571 | s->handshake_func=ssl3_connect; |
| 572 | s->ctx->stats.sess_connect_good++; |
| 573 | |
| 574 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
| 575 | |
| 576 | goto end; |
| 577 | /* break; */ |
| 578 | |
| 579 | default: |
| 580 | OPENSSL_PUT_ERROR(SSL, ssl3_connect, SSL_R_UNKNOWN_STATE); |
| 581 | ret= -1; |
| 582 | goto end; |
| 583 | /* break; */ |
| 584 | } |
| 585 | |
| 586 | /* did we do anything */ |
| 587 | if (!s->s3->tmp.reuse_message && !skip) |
| 588 | { |
| 589 | if (s->debug) |
| 590 | { |
| 591 | if ((ret=BIO_flush(s->wbio)) <= 0) |
| 592 | goto end; |
| 593 | } |
| 594 | |
| 595 | if ((cb != NULL) && (s->state != state)) |
| 596 | { |
| 597 | new_state=s->state; |
| 598 | s->state=state; |
| 599 | cb(s,SSL_CB_CONNECT_LOOP,1); |
| 600 | s->state=new_state; |
| 601 | } |
| 602 | } |
| 603 | skip=0; |
| 604 | } |
| 605 | end: |
| 606 | s->in_handshake--; |
| 607 | if (buf != NULL) |
| 608 | BUF_MEM_free(buf); |
| 609 | if (cb != NULL) |
| 610 | cb(s,SSL_CB_CONNECT_EXIT,ret); |
| 611 | return(ret); |
| 612 | } |
| 613 | |
| 614 | |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 615 | int ssl3_send_client_hello(SSL *s) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 616 | { |
| 617 | unsigned char *buf; |
| 618 | unsigned char *p,*d; |
| 619 | int i; |
| 620 | unsigned long l; |
| 621 | |
| 622 | buf=(unsigned char *)s->init_buf->data; |
| 623 | if (s->state == SSL3_ST_CW_CLNT_HELLO_A) |
| 624 | { |
| 625 | SSL_SESSION *sess = s->session; |
David Benjamin | 407886f | 2014-07-21 22:23:50 -0400 | [diff] [blame] | 626 | if (sess == NULL || |
| 627 | sess->ssl_version != s->version || |
| 628 | !sess->session_id_length || |
| 629 | sess->not_resumable) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 630 | { |
| 631 | if (!ssl_get_new_session(s,0)) |
| 632 | goto err; |
| 633 | } |
| 634 | if (s->method->version == DTLS_ANY_VERSION) |
| 635 | { |
| 636 | /* Determine which DTLS version to use */ |
| 637 | int options = s->options; |
| 638 | /* If DTLS 1.2 disabled correct the version number */ |
| 639 | if (options & SSL_OP_NO_DTLSv1_2) |
| 640 | { |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 641 | /* Disabling all versions is silly: return an |
| 642 | * error. |
| 643 | */ |
| 644 | if (options & SSL_OP_NO_DTLSv1) |
| 645 | { |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 646 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_hello, SSL_R_WRONG_SSL_VERSION); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 647 | goto err; |
| 648 | } |
| 649 | /* Update method so we don't use any DTLS 1.2 |
| 650 | * features. |
| 651 | */ |
| 652 | s->method = DTLSv1_client_method(); |
| 653 | s->version = DTLS1_VERSION; |
| 654 | } |
| 655 | else |
| 656 | { |
| 657 | /* We only support one version: update method */ |
| 658 | if (options & SSL_OP_NO_DTLSv1) |
| 659 | s->method = DTLSv1_2_client_method(); |
| 660 | s->version = DTLS1_2_VERSION; |
| 661 | } |
| 662 | s->client_version = s->version; |
| 663 | } |
| 664 | /* else use the pre-loaded session */ |
| 665 | |
| 666 | p=s->s3->client_random; |
| 667 | |
David Benjamin | f2fedef | 2014-08-16 01:37:34 -0400 | [diff] [blame] | 668 | /* If resending the ClientHello in DTLS after a |
| 669 | * HelloVerifyRequest, don't renegerate the client_random. The |
| 670 | * random must be reused. */ |
| 671 | if (!SSL_IS_DTLS(s) || !s->d1->send_cookie) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 672 | { |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 673 | ssl_fill_hello_random(s, 0, p, |
| 674 | sizeof(s->s3->client_random)); |
David Benjamin | f2fedef | 2014-08-16 01:37:34 -0400 | [diff] [blame] | 675 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 676 | |
Adam Langley | b0c235e | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 677 | /* Do the message type and length last. |
| 678 | * Note: the final argument to ssl_add_clienthello_tlsext below |
| 679 | * depends on the size of this prefix. */ |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 680 | d=p= ssl_handshake_start(s); |
| 681 | |
| 682 | /* version indicates the negotiated version: for example from |
| 683 | * an SSLv2/v3 compatible client hello). The client_version |
| 684 | * field is the maximum version we permit and it is also |
| 685 | * used in RSA encrypted premaster secrets. Some servers can |
| 686 | * choke if we initially report a higher version then |
| 687 | * renegotiate to a lower one in the premaster secret. This |
| 688 | * didn't happen with TLS 1.0 as most servers supported it |
| 689 | * but it can with TLS 1.1 or later if the server only supports |
| 690 | * 1.0. |
| 691 | * |
| 692 | * Possible scenario with previous logic: |
| 693 | * 1. Client hello indicates TLS 1.2 |
| 694 | * 2. Server hello says TLS 1.0 |
| 695 | * 3. RSA encrypted premaster secret uses 1.2. |
| 696 | * 4. Handhaked proceeds using TLS 1.0. |
| 697 | * 5. Server sends hello request to renegotiate. |
| 698 | * 6. Client hello indicates TLS v1.0 as we now |
| 699 | * know that is maximum server supports. |
| 700 | * 7. Server chokes on RSA encrypted premaster secret |
| 701 | * containing version 1.0. |
| 702 | * |
| 703 | * For interoperability it should be OK to always use the |
| 704 | * maximum version we support in client hello and then rely |
| 705 | * on the checking of version to ensure the servers isn't |
| 706 | * being inconsistent: for example initially negotiating with |
| 707 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using |
| 708 | * client_version in client hello and not resetting it to |
| 709 | * the negotiated version. |
| 710 | */ |
| 711 | #if 0 |
| 712 | *(p++)=s->version>>8; |
| 713 | *(p++)=s->version&0xff; |
| 714 | s->client_version=s->version; |
| 715 | #else |
| 716 | *(p++)=s->client_version>>8; |
| 717 | *(p++)=s->client_version&0xff; |
| 718 | #endif |
| 719 | |
| 720 | /* Random stuff */ |
| 721 | memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); |
| 722 | p+=SSL3_RANDOM_SIZE; |
| 723 | |
| 724 | /* Session ID */ |
| 725 | if (s->new_session) |
| 726 | i=0; |
| 727 | else |
| 728 | i=s->session->session_id_length; |
| 729 | *(p++)=i; |
| 730 | if (i != 0) |
| 731 | { |
| 732 | if (i > (int)sizeof(s->session->session_id)) |
| 733 | { |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 734 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_hello, ERR_R_INTERNAL_ERROR); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 735 | goto err; |
| 736 | } |
| 737 | memcpy(p,s->session->session_id,i); |
| 738 | p+=i; |
| 739 | } |
| 740 | |
| 741 | /* cookie stuff for DTLS */ |
| 742 | if (SSL_IS_DTLS(s)) |
| 743 | { |
| 744 | if ( s->d1->cookie_len > sizeof(s->d1->cookie)) |
| 745 | { |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 746 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_hello, ERR_R_INTERNAL_ERROR); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 747 | goto err; |
| 748 | } |
| 749 | *(p++) = s->d1->cookie_len; |
| 750 | memcpy(p, s->d1->cookie, s->d1->cookie_len); |
| 751 | p += s->d1->cookie_len; |
| 752 | } |
| 753 | |
| 754 | /* Ciphers supported */ |
David Benjamin | 39482a1 | 2014-07-20 13:30:15 -0400 | [diff] [blame] | 755 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &p[2]); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 756 | if (i == 0) |
| 757 | { |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 758 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_hello, SSL_R_NO_CIPHERS_AVAILABLE); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 759 | goto err; |
| 760 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 761 | s2n(i,p); |
| 762 | p+=i; |
| 763 | |
| 764 | /* COMPRESSION */ |
| 765 | *(p++)=1; |
| 766 | *(p++)=0; /* Add the NULL method */ |
| 767 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 768 | /* TLS extensions*/ |
| 769 | if (ssl_prepare_clienthello_tlsext(s) <= 0) |
| 770 | { |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 771 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_hello, SSL_R_CLIENTHELLO_TLSEXT); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 772 | goto err; |
| 773 | } |
Adam Langley | b0c235e | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 774 | if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, p-buf)) == NULL) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 775 | { |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 776 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_hello, ERR_R_INTERNAL_ERROR); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 777 | goto err; |
| 778 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 779 | |
| 780 | l= p-d; |
| 781 | ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l); |
| 782 | s->state=SSL3_ST_CW_CLNT_HELLO_B; |
| 783 | } |
| 784 | |
| 785 | /* SSL3_ST_CW_CLNT_HELLO_B */ |
| 786 | return ssl_do_write(s); |
| 787 | err: |
| 788 | return(-1); |
| 789 | } |
| 790 | |
| 791 | int ssl3_get_server_hello(SSL *s) |
| 792 | { |
| 793 | STACK_OF(SSL_CIPHER) *sk; |
| 794 | const SSL_CIPHER *c; |
| 795 | CERT *ct = s->cert; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 796 | int al=SSL_AD_INTERNAL_ERROR,ok; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 797 | long n; |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 798 | CBS server_hello, server_random, session_id; |
David Benjamin | 39482a1 | 2014-07-20 13:30:15 -0400 | [diff] [blame] | 799 | uint16_t server_version, cipher_suite; |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 800 | uint8_t compression_method; |
David Benjamin | 39ebf53 | 2014-08-31 02:23:49 -0400 | [diff] [blame] | 801 | unsigned long mask_ssl; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 802 | |
| 803 | n=s->method->ssl_get_message(s, |
| 804 | SSL3_ST_CR_SRVR_HELLO_A, |
| 805 | SSL3_ST_CR_SRVR_HELLO_B, |
David Benjamin | f2fedef | 2014-08-16 01:37:34 -0400 | [diff] [blame] | 806 | SSL3_MT_SERVER_HELLO, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 807 | 20000, /* ?? */ |
David Benjamin | 590cbe9 | 2014-08-25 21:34:56 -0400 | [diff] [blame] | 808 | SSL_GET_MESSAGE_HASH_MESSAGE, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 809 | &ok); |
| 810 | |
| 811 | if (!ok) return((int)n); |
| 812 | |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 813 | CBS_init(&server_hello, s->init_msg, n); |
| 814 | |
| 815 | if (!CBS_get_u16(&server_hello, &server_version) || |
| 816 | !CBS_get_bytes(&server_hello, &server_random, SSL3_RANDOM_SIZE) || |
| 817 | !CBS_get_u8_length_prefixed(&server_hello, &session_id) || |
David Benjamin | 39482a1 | 2014-07-20 13:30:15 -0400 | [diff] [blame] | 818 | CBS_len(&session_id) > SSL3_SESSION_ID_SIZE || |
| 819 | !CBS_get_u16(&server_hello, &cipher_suite) || |
| 820 | !CBS_get_u8(&server_hello, &compression_method)) |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 821 | { |
| 822 | al = SSL_AD_DECODE_ERROR; |
| 823 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_hello, SSL_R_DECODE_ERROR); |
| 824 | goto f_err; |
| 825 | } |
| 826 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 827 | if (s->method->version == DTLS_ANY_VERSION) |
| 828 | { |
| 829 | /* Work out correct protocol version to use */ |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 830 | int options = s->options; |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 831 | if (server_version == DTLS1_2_VERSION |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 832 | && !(options & SSL_OP_NO_DTLSv1_2)) |
| 833 | s->method = DTLSv1_2_client_method(); |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 834 | else if (server_version == DTLS1_VERSION |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 835 | && !(options & SSL_OP_NO_DTLSv1)) |
| 836 | s->method = DTLSv1_client_method(); |
| 837 | else |
| 838 | { |
| 839 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_hello, SSL_R_WRONG_SSL_VERSION); |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 840 | s->version = server_version; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 841 | al = SSL_AD_PROTOCOL_VERSION; |
| 842 | goto f_err; |
| 843 | } |
| 844 | s->version = s->client_version = s->method->version; |
| 845 | } |
| 846 | |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 847 | if (server_version != s->version) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 848 | { |
| 849 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_hello, SSL_R_WRONG_SSL_VERSION); |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 850 | s->version = (s->version & 0xff00) | (server_version & 0xff); |
| 851 | al = SSL_AD_PROTOCOL_VERSION; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 852 | goto f_err; |
| 853 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 854 | |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 855 | /* Copy over the server random. */ |
| 856 | memcpy(s->s3->server_random, CBS_data(&server_random), SSL3_RANDOM_SIZE); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 857 | |
David Benjamin | 9eaeef8 | 2014-07-21 22:22:02 -0400 | [diff] [blame] | 858 | s->hit = 0; |
| 859 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 860 | /* check if we want to resume the session based on external pre-shared secret */ |
| 861 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) |
| 862 | { |
David Benjamin | 6f26001 | 2014-08-15 13:49:12 -0400 | [diff] [blame] | 863 | const SSL_CIPHER *pref_cipher=NULL; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 864 | s->session->master_key_length=sizeof(s->session->master_key); |
| 865 | if (s->tls_session_secret_cb(s, s->session->master_key, |
| 866 | &s->session->master_key_length, |
| 867 | NULL, &pref_cipher, |
| 868 | s->tls_session_secret_cb_arg)) |
| 869 | { |
| 870 | s->session->cipher = pref_cipher ? |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 871 | pref_cipher : |
David Benjamin | 39482a1 | 2014-07-20 13:30:15 -0400 | [diff] [blame] | 872 | ssl3_get_cipher_by_value(cipher_suite); |
David Benjamin | 9eaeef8 | 2014-07-21 22:22:02 -0400 | [diff] [blame] | 873 | s->hit = 1; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 874 | } |
| 875 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 876 | |
David Benjamin | 9eaeef8 | 2014-07-21 22:22:02 -0400 | [diff] [blame] | 877 | if (!s->hit && CBS_len(&session_id) != 0 && |
David Benjamin | 22f9bcc | 2014-07-13 12:29:21 -0400 | [diff] [blame] | 878 | CBS_mem_equal(&session_id, |
| 879 | s->session->session_id, s->session->session_id_length)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 880 | { |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 881 | if(s->sid_ctx_length != s->session->sid_ctx_length |
| 882 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) |
| 883 | { |
| 884 | /* actually a client application bug */ |
| 885 | al = SSL_AD_ILLEGAL_PARAMETER; |
| 886 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_hello, SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
| 887 | goto f_err; |
| 888 | } |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 889 | s->hit = 1; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 890 | } |
David Benjamin | 9eaeef8 | 2014-07-21 22:22:02 -0400 | [diff] [blame] | 891 | |
| 892 | /* a miss or crap from the other end */ |
| 893 | if (!s->hit) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 894 | { |
| 895 | /* If we were trying for session-id reuse, make a new |
| 896 | * SSL_SESSION so we don't stuff up other people */ |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 897 | if (s->session->session_id_length > 0) |
| 898 | { |
| 899 | if (!ssl_get_new_session(s,0)) |
| 900 | { |
| 901 | goto f_err; |
| 902 | } |
| 903 | } |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 904 | /* Note: session_id could be empty. */ |
| 905 | s->session->session_id_length = CBS_len(&session_id); |
| 906 | memcpy(s->session->session_id, CBS_data(&session_id), CBS_len(&session_id)); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 907 | } |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 908 | |
David Benjamin | 39482a1 | 2014-07-20 13:30:15 -0400 | [diff] [blame] | 909 | c = ssl3_get_cipher_by_value(cipher_suite); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 910 | if (c == NULL) |
| 911 | { |
| 912 | /* unknown cipher */ |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 913 | al = SSL_AD_ILLEGAL_PARAMETER; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 914 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_hello, SSL_R_UNKNOWN_CIPHER_RETURNED); |
| 915 | goto f_err; |
| 916 | } |
David Benjamin | 39ebf53 | 2014-08-31 02:23:49 -0400 | [diff] [blame] | 917 | /* ct->mask_ssl was computed from client capabilities. Now |
| 918 | * that the final version is known, compute a new mask_ssl. */ |
| 919 | if (!SSL_USE_TLS1_2_CIPHERS(s)) |
| 920 | mask_ssl = SSL_TLSV1_2; |
| 921 | else |
| 922 | mask_ssl = 0; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 923 | /* If it is a disabled cipher we didn't send it in client hello, |
| 924 | * so return an error. |
| 925 | */ |
David Benjamin | 39ebf53 | 2014-08-31 02:23:49 -0400 | [diff] [blame] | 926 | if (c->algorithm_ssl & mask_ssl || |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 927 | c->algorithm_mkey & ct->mask_k || |
| 928 | c->algorithm_auth & ct->mask_a) |
| 929 | { |
| 930 | al=SSL_AD_ILLEGAL_PARAMETER; |
| 931 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_hello, SSL_R_WRONG_CIPHER_RETURNED); |
| 932 | goto f_err; |
| 933 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 934 | |
| 935 | sk=ssl_get_ciphers_by_id(s); |
| 936 | if (!sk_SSL_CIPHER_find(sk, NULL, c)) |
| 937 | { |
| 938 | /* we did not say we would use this cipher */ |
| 939 | al=SSL_AD_ILLEGAL_PARAMETER; |
| 940 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_hello, SSL_R_WRONG_CIPHER_RETURNED); |
| 941 | goto f_err; |
| 942 | } |
| 943 | |
| 944 | /* Depending on the session caching (internal/external), the cipher |
| 945 | and/or cipher_id values may not be set. Make sure that |
| 946 | cipher_id is set and use it for comparison. */ |
| 947 | if (s->session->cipher) |
| 948 | s->session->cipher_id = s->session->cipher->id; |
| 949 | if (s->hit && (s->session->cipher_id != c->id)) |
| 950 | { |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 951 | al = SSL_AD_ILLEGAL_PARAMETER; |
| 952 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_hello, SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
| 953 | goto f_err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 954 | } |
| 955 | s->s3->tmp.new_cipher=c; |
| 956 | /* Don't digest cached records if no sigalgs: we may need them for |
| 957 | * client authentication. |
| 958 | */ |
| 959 | if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s)) |
| 960 | goto f_err; |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 961 | |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 962 | /* Only the NULL compression algorithm is supported. */ |
| 963 | if (compression_method != 0) |
| 964 | { |
| 965 | al = SSL_AD_ILLEGAL_PARAMETER; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 966 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_hello, SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
| 967 | goto f_err; |
| 968 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 969 | |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 970 | /* TLS extensions */ |
| 971 | if (!ssl_parse_serverhello_tlsext(s, &server_hello)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 972 | { |
| 973 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_hello, SSL_R_PARSE_TLSEXT); |
| 974 | goto err; |
| 975 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 976 | |
David Benjamin | 0397309 | 2014-06-24 23:27:17 -0400 | [diff] [blame] | 977 | /* There should be nothing left over in the record. */ |
David Benjamin | a03d95d | 2014-07-12 19:49:07 -0400 | [diff] [blame] | 978 | if (CBS_len(&server_hello) != 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 979 | { |
| 980 | /* wrong packet length */ |
| 981 | al=SSL_AD_DECODE_ERROR; |
| 982 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_hello, SSL_R_BAD_PACKET_LENGTH); |
| 983 | goto f_err; |
| 984 | } |
| 985 | |
| 986 | return(1); |
| 987 | f_err: |
| 988 | ssl3_send_alert(s,SSL3_AL_FATAL,al); |
| 989 | err: |
| 990 | return(-1); |
| 991 | } |
| 992 | |
| 993 | int ssl3_get_server_certificate(SSL *s) |
| 994 | { |
| 995 | int al,i,ok,ret= -1; |
Alex Chernyakhovsky | c6318e3 | 2014-07-04 22:52:07 -0400 | [diff] [blame] | 996 | unsigned long n; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 997 | X509 *x=NULL; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 998 | STACK_OF(X509) *sk=NULL; |
| 999 | SESS_CERT *sc; |
| 1000 | EVP_PKEY *pkey=NULL; |
Alex Chernyakhovsky | c6318e3 | 2014-07-04 22:52:07 -0400 | [diff] [blame] | 1001 | CBS cbs, certificate_list; |
| 1002 | const uint8_t* data; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1003 | |
| 1004 | n=s->method->ssl_get_message(s, |
| 1005 | SSL3_ST_CR_CERT_A, |
| 1006 | SSL3_ST_CR_CERT_B, |
David Benjamin | e8f3d66 | 2014-07-12 01:10:19 -0400 | [diff] [blame] | 1007 | SSL3_MT_CERTIFICATE, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1008 | s->max_cert_list, |
David Benjamin | 590cbe9 | 2014-08-25 21:34:56 -0400 | [diff] [blame] | 1009 | SSL_GET_MESSAGE_HASH_MESSAGE, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1010 | &ok); |
| 1011 | |
| 1012 | if (!ok) return((int)n); |
| 1013 | |
David Benjamin | 51b1f74 | 2014-07-12 16:31:12 -0400 | [diff] [blame] | 1014 | CBS_init(&cbs, s->init_msg, n); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1015 | |
| 1016 | if ((sk=sk_X509_new_null()) == NULL) |
| 1017 | { |
| 1018 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, ERR_R_MALLOC_FAILURE); |
| 1019 | goto err; |
| 1020 | } |
| 1021 | |
Alex Chernyakhovsky | c6318e3 | 2014-07-04 22:52:07 -0400 | [diff] [blame] | 1022 | if (!CBS_get_u24_length_prefixed(&cbs, &certificate_list) || |
| 1023 | CBS_len(&cbs) != 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1024 | { |
Alex Chernyakhovsky | c6318e3 | 2014-07-04 22:52:07 -0400 | [diff] [blame] | 1025 | al = SSL_AD_DECODE_ERROR; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1026 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, SSL_R_LENGTH_MISMATCH); |
| 1027 | goto f_err; |
| 1028 | } |
Alex Chernyakhovsky | c6318e3 | 2014-07-04 22:52:07 -0400 | [diff] [blame] | 1029 | |
| 1030 | while (CBS_len(&certificate_list) > 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1031 | { |
Alex Chernyakhovsky | c6318e3 | 2014-07-04 22:52:07 -0400 | [diff] [blame] | 1032 | CBS certificate; |
| 1033 | if (!CBS_get_u24_length_prefixed(&certificate_list, &certificate)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1034 | { |
Alex Chernyakhovsky | c6318e3 | 2014-07-04 22:52:07 -0400 | [diff] [blame] | 1035 | al = SSL_AD_DECODE_ERROR; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1036 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, SSL_R_CERT_LENGTH_MISMATCH); |
| 1037 | goto f_err; |
| 1038 | } |
Alex Chernyakhovsky | c6318e3 | 2014-07-04 22:52:07 -0400 | [diff] [blame] | 1039 | data = CBS_data(&certificate); |
| 1040 | x = d2i_X509(NULL, &data, CBS_len(&certificate)); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1041 | if (x == NULL) |
| 1042 | { |
| 1043 | al=SSL_AD_BAD_CERTIFICATE; |
| 1044 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, ERR_R_ASN1_LIB); |
| 1045 | goto f_err; |
| 1046 | } |
Alex Chernyakhovsky | c6318e3 | 2014-07-04 22:52:07 -0400 | [diff] [blame] | 1047 | if (!CBS_skip(&certificate, data - CBS_data(&certificate))) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1048 | { |
Alex Chernyakhovsky | c6318e3 | 2014-07-04 22:52:07 -0400 | [diff] [blame] | 1049 | al = SSL_AD_INTERNAL_ERROR; |
| 1050 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, ERR_R_INTERNAL_ERROR); |
| 1051 | goto f_err; |
| 1052 | } |
| 1053 | if (CBS_len(&certificate) != 0) |
| 1054 | { |
| 1055 | al = SSL_AD_DECODE_ERROR; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1056 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, SSL_R_CERT_LENGTH_MISMATCH); |
| 1057 | goto f_err; |
| 1058 | } |
| 1059 | if (!sk_X509_push(sk,x)) |
| 1060 | { |
| 1061 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, ERR_R_MALLOC_FAILURE); |
| 1062 | goto err; |
| 1063 | } |
| 1064 | x=NULL; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1065 | } |
| 1066 | |
| 1067 | i=ssl_verify_cert_chain(s,sk); |
| 1068 | if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) |
| 1069 | ) |
| 1070 | { |
| 1071 | al=ssl_verify_alarm_type(s->verify_result); |
| 1072 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, SSL_R_CERTIFICATE_VERIFY_FAILED); |
| 1073 | goto f_err; |
| 1074 | } |
| 1075 | ERR_clear_error(); /* but we keep s->verify_result */ |
| 1076 | |
| 1077 | sc=ssl_sess_cert_new(); |
| 1078 | if (sc == NULL) goto err; |
| 1079 | |
| 1080 | if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); |
| 1081 | s->session->sess_cert=sc; |
| 1082 | |
| 1083 | sc->cert_chain=sk; |
| 1084 | /* Inconsistency alert: cert_chain does include the peer's |
| 1085 | * certificate, which we don't include in s3_srvr.c */ |
| 1086 | x=sk_X509_value(sk,0); |
| 1087 | sk=NULL; |
| 1088 | /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ |
| 1089 | |
| 1090 | pkey=X509_get_pubkey(x); |
| 1091 | |
David Benjamin | d26aea6 | 2014-07-12 00:13:56 -0400 | [diff] [blame] | 1092 | if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1093 | { |
| 1094 | x=NULL; |
| 1095 | al=SSL3_AL_FATAL; |
| 1096 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
| 1097 | goto f_err; |
| 1098 | } |
| 1099 | |
| 1100 | i=ssl_cert_type(x,pkey); |
David Benjamin | d26aea6 | 2014-07-12 00:13:56 -0400 | [diff] [blame] | 1101 | if (i < 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1102 | { |
| 1103 | x=NULL; |
| 1104 | al=SSL3_AL_FATAL; |
| 1105 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
| 1106 | goto f_err; |
| 1107 | } |
| 1108 | |
David Benjamin | d26aea6 | 2014-07-12 00:13:56 -0400 | [diff] [blame] | 1109 | int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
| 1110 | if (exp_idx >= 0 && i != exp_idx) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1111 | { |
David Benjamin | d26aea6 | 2014-07-12 00:13:56 -0400 | [diff] [blame] | 1112 | x=NULL; |
| 1113 | al=SSL_AD_ILLEGAL_PARAMETER; |
| 1114 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, SSL_R_WRONG_CERTIFICATE_TYPE); |
| 1115 | goto f_err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1116 | } |
David Benjamin | d26aea6 | 2014-07-12 00:13:56 -0400 | [diff] [blame] | 1117 | sc->peer_cert_type=i; |
David Benjamin | d26aea6 | 2014-07-12 00:13:56 -0400 | [diff] [blame] | 1118 | /* Why would the following ever happen? |
| 1119 | * We just created sc a couple of lines ago. */ |
| 1120 | if (sc->peer_pkeys[i].x509 != NULL) |
| 1121 | X509_free(sc->peer_pkeys[i].x509); |
David Benjamin | 150c617 | 2014-08-05 22:22:49 -0400 | [diff] [blame] | 1122 | sc->peer_pkeys[i].x509 = X509_up_ref(x); |
| 1123 | sc->peer_key = &(sc->peer_pkeys[i]); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1124 | |
David Benjamin | d26aea6 | 2014-07-12 00:13:56 -0400 | [diff] [blame] | 1125 | if (s->session->peer != NULL) |
| 1126 | X509_free(s->session->peer); |
David Benjamin | 150c617 | 2014-08-05 22:22:49 -0400 | [diff] [blame] | 1127 | s->session->peer = X509_up_ref(x); |
David Benjamin | d26aea6 | 2014-07-12 00:13:56 -0400 | [diff] [blame] | 1128 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1129 | s->session->verify_result = s->verify_result; |
| 1130 | |
| 1131 | x=NULL; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1132 | ret=1; |
| 1133 | if (0) |
| 1134 | { |
| 1135 | f_err: |
| 1136 | ssl3_send_alert(s,SSL3_AL_FATAL,al); |
| 1137 | } |
| 1138 | err: |
| 1139 | EVP_PKEY_free(pkey); |
| 1140 | X509_free(x); |
| 1141 | sk_X509_pop_free(sk,X509_free); |
| 1142 | return(ret); |
| 1143 | } |
| 1144 | |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1145 | int ssl3_get_server_key_exchange(SSL *s) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1146 | { |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1147 | EVP_MD_CTX md_ctx; |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1148 | int al,ok; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1149 | long n,alg_k,alg_a; |
| 1150 | EVP_PKEY *pkey=NULL; |
| 1151 | const EVP_MD *md = NULL; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1152 | RSA *rsa=NULL; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1153 | DH *dh=NULL; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1154 | EC_KEY *ecdh = NULL; |
| 1155 | BN_CTX *bn_ctx = NULL; |
| 1156 | EC_POINT *srvr_ecpoint = NULL; |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1157 | CBS server_key_exchange, server_key_exchange_orig, parameter; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1158 | |
| 1159 | /* use same message size as in ssl3_get_certificate_request() |
| 1160 | * as ServerKeyExchange message may be skipped */ |
| 1161 | n=s->method->ssl_get_message(s, |
| 1162 | SSL3_ST_CR_KEY_EXCH_A, |
| 1163 | SSL3_ST_CR_KEY_EXCH_B, |
| 1164 | -1, |
| 1165 | s->max_cert_list, |
David Benjamin | 590cbe9 | 2014-08-25 21:34:56 -0400 | [diff] [blame] | 1166 | SSL_GET_MESSAGE_HASH_MESSAGE, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1167 | &ok); |
| 1168 | if (!ok) return((int)n); |
| 1169 | |
| 1170 | if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) |
| 1171 | { |
David Benjamin | 9c651c9 | 2014-07-12 13:27:45 -0400 | [diff] [blame] | 1172 | if (ssl_cipher_requires_server_key_exchange(s->s3->tmp.new_cipher)) |
| 1173 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1174 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_UNEXPECTED_MESSAGE); |
David Benjamin | 9c651c9 | 2014-07-12 13:27:45 -0400 | [diff] [blame] | 1175 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); |
| 1176 | return -1; |
| 1177 | } |
| 1178 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1179 | /* In plain PSK ciphersuite, ServerKeyExchange can be |
| 1180 | omitted if no identity hint is sent. Set |
| 1181 | session->sess_cert anyway to avoid problems |
| 1182 | later.*/ |
David Benjamin | 5235f74 | 2014-07-12 13:11:24 -0400 | [diff] [blame] | 1183 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aPSK) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1184 | { |
David Benjamin | 0c49ec9 | 2014-07-12 13:16:51 -0400 | [diff] [blame] | 1185 | /* PSK ciphersuites that also send a |
| 1186 | * Certificate would have already initialized |
| 1187 | * |sess_cert|. */ |
| 1188 | if (s->session->sess_cert == NULL) |
| 1189 | s->session->sess_cert = ssl_sess_cert_new(); |
Adam Langley | 0289c73 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1190 | if (s->session->psk_identity_hint) |
| 1191 | { |
| 1192 | OPENSSL_free(s->session->psk_identity_hint); |
| 1193 | s->session->psk_identity_hint = NULL; |
| 1194 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1195 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1196 | s->s3->tmp.reuse_message=1; |
| 1197 | return(1); |
| 1198 | } |
| 1199 | |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1200 | /* Retain a copy of the original CBS to compute the signature |
| 1201 | * over. */ |
| 1202 | CBS_init(&server_key_exchange, s->init_msg, n); |
| 1203 | server_key_exchange_orig = server_key_exchange; |
| 1204 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1205 | if (s->session->sess_cert != NULL) |
| 1206 | { |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1207 | if (s->session->sess_cert->peer_rsa_tmp != NULL) |
| 1208 | { |
| 1209 | RSA_free(s->session->sess_cert->peer_rsa_tmp); |
| 1210 | s->session->sess_cert->peer_rsa_tmp=NULL; |
| 1211 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1212 | if (s->session->sess_cert->peer_dh_tmp) |
| 1213 | { |
| 1214 | DH_free(s->session->sess_cert->peer_dh_tmp); |
| 1215 | s->session->sess_cert->peer_dh_tmp=NULL; |
| 1216 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1217 | if (s->session->sess_cert->peer_ecdh_tmp) |
| 1218 | { |
| 1219 | EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); |
| 1220 | s->session->sess_cert->peer_ecdh_tmp=NULL; |
| 1221 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1222 | } |
| 1223 | else |
| 1224 | { |
| 1225 | s->session->sess_cert=ssl_sess_cert_new(); |
| 1226 | } |
| 1227 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1228 | alg_k=s->s3->tmp.new_cipher->algorithm_mkey; |
| 1229 | alg_a=s->s3->tmp.new_cipher->algorithm_auth; |
| 1230 | EVP_MD_CTX_init(&md_ctx); |
| 1231 | |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1232 | if (alg_a & SSL_aPSK) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1233 | { |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1234 | CBS psk_identity_hint; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1235 | |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1236 | /* Each of the PSK key exchanges begins with a |
| 1237 | * psk_identity_hint. */ |
| 1238 | if (!CBS_get_u16_length_prefixed(&server_key_exchange, &psk_identity_hint)) |
Adam Langley | 0289c73 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1239 | { |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1240 | al = SSL_AD_DECODE_ERROR; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1241 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_DECODE_ERROR); |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1242 | goto f_err; |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1243 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1244 | |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1245 | /* Store PSK identity hint for later use, hint is used in |
| 1246 | * ssl3_send_client_key_exchange. Assume that the maximum |
| 1247 | * length of a PSK identity hint can be as long as the maximum |
| 1248 | * length of a PSK identity. Also do not allow NULL |
| 1249 | * characters; identities are saved as C strings. |
| 1250 | * |
| 1251 | * TODO(davidben): Should invalid hints be ignored? It's a hint |
| 1252 | * rather than a specific identity. */ |
| 1253 | if (CBS_len(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN || |
| 1254 | CBS_contains_zero_byte(&psk_identity_hint)) |
| 1255 | { |
| 1256 | al = SSL_AD_HANDSHAKE_FAILURE; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1257 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_DATA_LENGTH_TOO_LONG); |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1258 | goto f_err; |
| 1259 | } |
| 1260 | |
| 1261 | /* Save the identity hint as a C string. */ |
| 1262 | if (!CBS_strdup(&psk_identity_hint, &s->session->psk_identity_hint)) |
| 1263 | { |
| 1264 | al = SSL_AD_HANDSHAKE_FAILURE; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1265 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_MALLOC_FAILURE); |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1266 | goto f_err; |
| 1267 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1268 | } |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1269 | |
David Benjamin | 457112e | 2014-08-27 14:35:09 -0400 | [diff] [blame] | 1270 | if (alg_k & SSL_kRSA) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1271 | { |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1272 | CBS rsa_modulus, rsa_exponent; |
| 1273 | |
| 1274 | /* TODO(davidben): This was originally for export |
| 1275 | * reasons. Do we still need to support it? */ |
| 1276 | |
| 1277 | if (!CBS_get_u16_length_prefixed(&server_key_exchange, &rsa_modulus) || |
| 1278 | CBS_len(&rsa_modulus) == 0 || |
| 1279 | !CBS_get_u16_length_prefixed(&server_key_exchange, &rsa_exponent) || |
| 1280 | CBS_len(&rsa_exponent) == 0) |
| 1281 | { |
| 1282 | al = SSL_AD_DECODE_ERROR; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1283 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_DECODE_ERROR); |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1284 | goto f_err; |
| 1285 | } |
| 1286 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1287 | if ((rsa=RSA_new()) == NULL) |
| 1288 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1289 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_MALLOC_FAILURE); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1290 | goto err; |
| 1291 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1292 | |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1293 | if (!(rsa->n = BN_bin2bn(CBS_data(&rsa_modulus), |
| 1294 | CBS_len(&rsa_modulus), rsa->n))) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1295 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1296 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_BN_LIB); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1297 | goto err; |
| 1298 | } |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1299 | |
| 1300 | if (!(rsa->e = BN_bin2bn(CBS_data(&rsa_exponent), |
| 1301 | CBS_len(&rsa_exponent), rsa->e))) |
| 1302 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1303 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_BN_LIB); |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1304 | goto err; |
| 1305 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1306 | |
| 1307 | /* this should be because we are using an export cipher */ |
| 1308 | if (alg_a & SSL_aRSA) |
| 1309 | pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); |
| 1310 | else |
| 1311 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1312 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_INTERNAL_ERROR); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1313 | goto err; |
| 1314 | } |
| 1315 | s->session->sess_cert->peer_rsa_tmp=rsa; |
| 1316 | rsa=NULL; |
| 1317 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1318 | else if (alg_k & SSL_kEDH) |
| 1319 | { |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1320 | CBS dh_p, dh_g, dh_Ys; |
| 1321 | |
| 1322 | if (!CBS_get_u16_length_prefixed(&server_key_exchange, &dh_p) || |
| 1323 | CBS_len(&dh_p) == 0 || |
| 1324 | !CBS_get_u16_length_prefixed(&server_key_exchange, &dh_g) || |
| 1325 | CBS_len(&dh_g) == 0 || |
| 1326 | !CBS_get_u16_length_prefixed(&server_key_exchange, &dh_Ys) || |
| 1327 | CBS_len(&dh_Ys) == 0) |
| 1328 | { |
| 1329 | al = SSL_AD_DECODE_ERROR; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1330 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_DECODE_ERROR); |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1331 | goto f_err; |
| 1332 | } |
| 1333 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1334 | if ((dh=DH_new()) == NULL) |
| 1335 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1336 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_DH_LIB); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1337 | goto err; |
| 1338 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1339 | |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1340 | if (!(dh->p = BN_bin2bn(CBS_data(&dh_p), CBS_len(&dh_p), NULL))) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1341 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1342 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_BN_LIB); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1343 | goto err; |
| 1344 | } |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1345 | if (!(dh->g=BN_bin2bn(CBS_data(&dh_g), CBS_len(&dh_g), NULL))) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1346 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1347 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_BN_LIB); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1348 | goto err; |
| 1349 | } |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1350 | if (!(dh->pub_key = BN_bin2bn(CBS_data(&dh_Ys), CBS_len(&dh_Ys), NULL))) |
| 1351 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1352 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_BN_LIB); |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1353 | goto err; |
| 1354 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1355 | |
HÃ¥vard Molland | 16c623b | 2014-08-12 11:29:57 +0200 | [diff] [blame] | 1356 | if (DH_size(dh) < 512/8) |
| 1357 | { |
| 1358 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_BAD_DH_P_LENGTH); |
| 1359 | goto err; |
| 1360 | } |
| 1361 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1362 | if (alg_a & SSL_aRSA) |
| 1363 | pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1364 | /* else anonymous DH, so no certificate or pkey. */ |
| 1365 | |
| 1366 | s->session->sess_cert->peer_dh_tmp=dh; |
| 1367 | dh=NULL; |
| 1368 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1369 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1370 | else if (alg_k & SSL_kEECDH) |
| 1371 | { |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1372 | uint16_t curve_id; |
| 1373 | int curve_nid = 0; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1374 | EC_GROUP *ngroup; |
| 1375 | const EC_GROUP *group; |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1376 | CBS point; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1377 | |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1378 | /* Extract elliptic curve parameters and the server's |
| 1379 | * ephemeral ECDH public key. Check curve is one of |
| 1380 | * our preferences, if not server has sent an invalid |
| 1381 | * curve. |
| 1382 | */ |
| 1383 | if (!tls1_check_curve(s, &server_key_exchange, &curve_id)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1384 | { |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1385 | al = SSL_AD_DECODE_ERROR; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1386 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_WRONG_CURVE); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1387 | goto f_err; |
| 1388 | } |
| 1389 | |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1390 | if ((curve_nid = tls1_ec_curve_id2nid(curve_id)) == 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1391 | { |
| 1392 | al=SSL_AD_INTERNAL_ERROR; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1393 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1394 | goto f_err; |
| 1395 | } |
| 1396 | |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1397 | if ((ecdh=EC_KEY_new()) == NULL) |
| 1398 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1399 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_MALLOC_FAILURE); |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1400 | goto err; |
| 1401 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1402 | ngroup = EC_GROUP_new_by_curve_name(curve_nid); |
| 1403 | if (ngroup == NULL) |
| 1404 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1405 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_EC_LIB); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1406 | goto err; |
| 1407 | } |
| 1408 | if (EC_KEY_set_group(ecdh, ngroup) == 0) |
| 1409 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1410 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_EC_LIB); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1411 | goto err; |
| 1412 | } |
| 1413 | EC_GROUP_free(ngroup); |
| 1414 | |
| 1415 | group = EC_KEY_get0_group(ecdh); |
| 1416 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1417 | /* Next, get the encoded ECPoint */ |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1418 | if (!CBS_get_u8_length_prefixed(&server_key_exchange, &point)) |
| 1419 | { |
| 1420 | al = SSL_AD_DECODE_ERROR; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1421 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_DECODE_ERROR); |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1422 | goto f_err; |
| 1423 | } |
| 1424 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1425 | if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || |
| 1426 | ((bn_ctx = BN_CTX_new()) == NULL)) |
| 1427 | { |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1428 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_MALLOC_FAILURE); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1429 | goto err; |
| 1430 | } |
| 1431 | |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1432 | if (!EC_POINT_oct2point(group, srvr_ecpoint, |
| 1433 | CBS_data(&point), CBS_len(&point), bn_ctx)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1434 | { |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1435 | al = SSL_AD_DECODE_ERROR; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1436 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_BAD_ECPOINT); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1437 | goto f_err; |
| 1438 | } |
| 1439 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1440 | /* The ECC/TLS specification does not mention |
| 1441 | * the use of DSA to sign ECParameters in the server |
| 1442 | * key exchange message. We do support RSA and ECDSA. |
| 1443 | */ |
| 1444 | if (0) ; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1445 | else if (alg_a & SSL_aRSA) |
| 1446 | pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1447 | else if (alg_a & SSL_aECDSA) |
| 1448 | pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1449 | /* else anonymous ECDH, so no certificate or pkey. */ |
| 1450 | EC_KEY_set_public_key(ecdh, srvr_ecpoint); |
| 1451 | s->session->sess_cert->peer_ecdh_tmp=ecdh; |
| 1452 | ecdh=NULL; |
| 1453 | BN_CTX_free(bn_ctx); |
| 1454 | bn_ctx = NULL; |
| 1455 | EC_POINT_free(srvr_ecpoint); |
| 1456 | srvr_ecpoint = NULL; |
| 1457 | } |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1458 | |
| 1459 | else if (!(alg_k & SSL_kPSK)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1460 | { |
| 1461 | al=SSL_AD_UNEXPECTED_MESSAGE; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1462 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_UNEXPECTED_MESSAGE); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1463 | goto f_err; |
| 1464 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1465 | |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1466 | /* At this point, |server_key_exchange| contains the |
| 1467 | * signature, if any, while |server_key_exchange_orig| |
| 1468 | * contains the entire message. From that, derive a CBS |
| 1469 | * containing just the parameter. */ |
| 1470 | CBS_init(¶meter, CBS_data(&server_key_exchange_orig), |
| 1471 | CBS_len(&server_key_exchange_orig) - |
| 1472 | CBS_len(&server_key_exchange)); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1473 | |
| 1474 | /* if it was signed, check the signature */ |
| 1475 | if (pkey != NULL) |
| 1476 | { |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1477 | CBS signature; |
| 1478 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1479 | if (SSL_USE_SIGALGS(s)) |
| 1480 | { |
David Benjamin | 05da6e1 | 2014-07-12 20:42:55 -0400 | [diff] [blame] | 1481 | if (!tls12_check_peer_sigalg(&md, &al, s, &server_key_exchange, pkey)) |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1482 | goto f_err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1483 | } |
| 1484 | else |
| 1485 | md = EVP_sha1(); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1486 | |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1487 | /* The last field in |server_key_exchange| is the |
| 1488 | * signature. */ |
| 1489 | if (!CBS_get_u16_length_prefixed(&server_key_exchange, &signature) || |
| 1490 | CBS_len(&server_key_exchange) != 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1491 | { |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1492 | al = SSL_AD_DECODE_ERROR; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1493 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_DECODE_ERROR); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1494 | goto f_err; |
| 1495 | } |
| 1496 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1497 | if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) |
| 1498 | { |
| 1499 | int num; |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1500 | unsigned char *q, md_buf[EVP_MAX_MD_SIZE*2]; |
| 1501 | size_t md_len = 0; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1502 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1503 | q=md_buf; |
| 1504 | for (num=2; num > 0; num--) |
| 1505 | { |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1506 | unsigned int digest_len; |
David Benjamin | e712778 | 2014-08-18 23:15:29 -0400 | [diff] [blame] | 1507 | EVP_DigestInit_ex(&md_ctx, |
| 1508 | (num == 2) ? EVP_md5() : EVP_sha1(), NULL); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1509 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
| 1510 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1511 | EVP_DigestUpdate(&md_ctx, CBS_data(¶meter), CBS_len(¶meter)); |
| 1512 | EVP_DigestFinal_ex(&md_ctx, q, &digest_len); |
| 1513 | q += digest_len; |
| 1514 | md_len += digest_len; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1515 | } |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1516 | if (!RSA_verify(NID_md5_sha1, md_buf, md_len, |
| 1517 | CBS_data(&signature), CBS_len(&signature), |
| 1518 | pkey->pkey.rsa)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1519 | { |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1520 | al = SSL_AD_DECRYPT_ERROR; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1521 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_BAD_SIGNATURE); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1522 | goto f_err; |
| 1523 | } |
| 1524 | } |
| 1525 | else |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1526 | { |
| 1527 | EVP_VerifyInit_ex(&md_ctx, md, NULL); |
| 1528 | EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
| 1529 | EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1530 | EVP_VerifyUpdate(&md_ctx, CBS_data(¶meter), CBS_len(¶meter)); |
| 1531 | if (EVP_VerifyFinal(&md_ctx, CBS_data(&signature), CBS_len(&signature), pkey) <= 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1532 | { |
| 1533 | /* bad signature */ |
| 1534 | al=SSL_AD_DECRYPT_ERROR; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1535 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_BAD_SIGNATURE); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1536 | goto f_err; |
| 1537 | } |
| 1538 | } |
| 1539 | } |
| 1540 | else |
| 1541 | { |
David Benjamin | e8f3d66 | 2014-07-12 01:10:19 -0400 | [diff] [blame] | 1542 | if (ssl_cipher_has_server_public_key(s->s3->tmp.new_cipher)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1543 | { |
| 1544 | /* Might be wrong key type, check it */ |
| 1545 | if (ssl3_check_cert_and_algorithm(s)) |
| 1546 | /* Otherwise this shouldn't happen */ |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1547 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, ERR_R_INTERNAL_ERROR); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1548 | goto err; |
| 1549 | } |
| 1550 | /* still data left over */ |
David Benjamin | ed43958 | 2014-07-14 19:13:02 -0400 | [diff] [blame] | 1551 | if (CBS_len(&server_key_exchange) > 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1552 | { |
| 1553 | al=SSL_AD_DECODE_ERROR; |
David Benjamin | 8f8040d | 2014-07-14 19:14:46 -0400 | [diff] [blame] | 1554 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_key_exchange, SSL_R_EXTRA_DATA_IN_MESSAGE); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1555 | goto f_err; |
| 1556 | } |
| 1557 | } |
| 1558 | EVP_PKEY_free(pkey); |
| 1559 | EVP_MD_CTX_cleanup(&md_ctx); |
| 1560 | return(1); |
| 1561 | f_err: |
| 1562 | ssl3_send_alert(s,SSL3_AL_FATAL,al); |
| 1563 | err: |
| 1564 | EVP_PKEY_free(pkey); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1565 | if (rsa != NULL) |
| 1566 | RSA_free(rsa); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1567 | if (dh != NULL) |
| 1568 | DH_free(dh); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1569 | BN_CTX_free(bn_ctx); |
| 1570 | EC_POINT_free(srvr_ecpoint); |
| 1571 | if (ecdh != NULL) |
| 1572 | EC_KEY_free(ecdh); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1573 | EVP_MD_CTX_cleanup(&md_ctx); |
| 1574 | return(-1); |
| 1575 | } |
| 1576 | |
| 1577 | static int ca_dn_cmp(const X509_NAME **a, const X509_NAME **b) |
| 1578 | { |
| 1579 | return(X509_NAME_cmp(*a,*b)); |
| 1580 | } |
| 1581 | |
| 1582 | int ssl3_get_certificate_request(SSL *s) |
| 1583 | { |
| 1584 | int ok,ret=0; |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1585 | unsigned long n; |
| 1586 | unsigned int i; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1587 | X509_NAME *xn=NULL; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1588 | STACK_OF(X509_NAME) *ca_sk=NULL; |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1589 | CBS cbs; |
| 1590 | CBS certificate_types; |
| 1591 | CBS certificate_authorities; |
| 1592 | const uint8_t *data; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1593 | |
| 1594 | n=s->method->ssl_get_message(s, |
| 1595 | SSL3_ST_CR_CERT_REQ_A, |
| 1596 | SSL3_ST_CR_CERT_REQ_B, |
| 1597 | -1, |
| 1598 | s->max_cert_list, |
David Benjamin | 590cbe9 | 2014-08-25 21:34:56 -0400 | [diff] [blame] | 1599 | SSL_GET_MESSAGE_HASH_MESSAGE, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1600 | &ok); |
| 1601 | |
| 1602 | if (!ok) return((int)n); |
| 1603 | |
| 1604 | s->s3->tmp.cert_req=0; |
| 1605 | |
| 1606 | if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) |
| 1607 | { |
| 1608 | s->s3->tmp.reuse_message=1; |
| 1609 | /* If we get here we don't need any cached handshake records |
| 1610 | * as we wont be doing client auth. |
| 1611 | */ |
| 1612 | if (s->s3->handshake_buffer) |
| 1613 | { |
| 1614 | if (!ssl3_digest_cached_records(s)) |
| 1615 | goto err; |
| 1616 | } |
| 1617 | return(1); |
| 1618 | } |
| 1619 | |
| 1620 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) |
| 1621 | { |
| 1622 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); |
| 1623 | OPENSSL_PUT_ERROR(SSL, ssl3_get_certificate_request, SSL_R_WRONG_MESSAGE_TYPE); |
| 1624 | goto err; |
| 1625 | } |
| 1626 | |
| 1627 | /* TLS does not like anon-DH with client cert */ |
| 1628 | if (s->version > SSL3_VERSION) |
| 1629 | { |
| 1630 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) |
| 1631 | { |
| 1632 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); |
| 1633 | OPENSSL_PUT_ERROR(SSL, ssl3_get_certificate_request, SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); |
| 1634 | goto err; |
| 1635 | } |
| 1636 | } |
| 1637 | |
David Benjamin | 51b1f74 | 2014-07-12 16:31:12 -0400 | [diff] [blame] | 1638 | CBS_init(&cbs, s->init_msg, n); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1639 | |
| 1640 | ca_sk = sk_X509_NAME_new(ca_dn_cmp); |
| 1641 | if (ca_sk == NULL) |
| 1642 | { |
| 1643 | OPENSSL_PUT_ERROR(SSL, ssl3_get_certificate_request, ERR_R_MALLOC_FAILURE); |
| 1644 | goto err; |
| 1645 | } |
| 1646 | |
| 1647 | /* get the certificate types */ |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1648 | if (!CBS_get_u8_length_prefixed(&cbs, &certificate_types)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1649 | { |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1650 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| 1651 | OPENSSL_PUT_ERROR(SSL, ssl3_get_certificate_request, SSL_R_DECODE_ERROR); |
| 1652 | goto err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1653 | } |
David Benjamin | 676d1e7 | 2014-07-08 14:34:10 -0400 | [diff] [blame] | 1654 | if (!CBS_stow(&certificate_types, |
| 1655 | &s->s3->tmp.certificate_types, |
| 1656 | &s->s3->tmp.num_certificate_types)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1657 | { |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1658 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
| 1659 | goto err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1660 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1661 | if (SSL_USE_SIGALGS(s)) |
| 1662 | { |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1663 | CBS supported_signature_algorithms; |
| 1664 | if (!CBS_get_u16_length_prefixed(&cbs, &supported_signature_algorithms)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1665 | { |
| 1666 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1667 | OPENSSL_PUT_ERROR(SSL, ssl3_get_certificate_request, SSL_R_DECODE_ERROR); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1668 | goto err; |
| 1669 | } |
| 1670 | /* Clear certificate digests and validity flags */ |
| 1671 | for (i = 0; i < SSL_PKEY_NUM; i++) |
| 1672 | { |
| 1673 | s->cert->pkeys[i].digest = NULL; |
| 1674 | s->cert->pkeys[i].valid_flags = 0; |
| 1675 | } |
David Benjamin | cd99694 | 2014-07-20 16:23:51 -0400 | [diff] [blame] | 1676 | if (!tls1_process_sigalgs(s, &supported_signature_algorithms)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1677 | { |
| 1678 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
| 1679 | OPENSSL_PUT_ERROR(SSL, ssl3_get_certificate_request, SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
| 1680 | goto err; |
| 1681 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1682 | } |
| 1683 | |
| 1684 | /* get the CA RDNs */ |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1685 | if (!CBS_get_u16_length_prefixed(&cbs, &certificate_authorities)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1686 | { |
| 1687 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
| 1688 | OPENSSL_PUT_ERROR(SSL, ssl3_get_certificate_request, SSL_R_LENGTH_MISMATCH); |
| 1689 | goto err; |
| 1690 | } |
| 1691 | |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1692 | while (CBS_len(&certificate_authorities) > 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1693 | { |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1694 | CBS distinguished_name; |
| 1695 | if (!CBS_get_u16_length_prefixed(&certificate_authorities, &distinguished_name)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1696 | { |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1697 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
| 1698 | OPENSSL_PUT_ERROR(SSL, ssl3_get_certificate_request, SSL_R_CA_DN_TOO_LONG); |
| 1699 | goto err; |
| 1700 | } |
| 1701 | |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1702 | data = CBS_data(&distinguished_name); |
| 1703 | if ((xn=d2i_X509_NAME(NULL, &data, CBS_len(&distinguished_name))) == NULL) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1704 | { |
Alex Chernyakhovsky | 9c890d4 | 2014-07-05 00:53:11 -0400 | [diff] [blame] | 1705 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
| 1706 | OPENSSL_PUT_ERROR(SSL, ssl3_get_certificate_request, ERR_R_ASN1_LIB); |
| 1707 | goto err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1708 | } |
| 1709 | |
David Benjamin | 407a10c | 2014-07-16 12:58:59 -0400 | [diff] [blame] | 1710 | if (!CBS_skip(&distinguished_name, data - CBS_data(&distinguished_name))) |
Alex Chernyakhovsky | 31955f9 | 2014-07-05 01:12:34 -0400 | [diff] [blame] | 1711 | { |
| 1712 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
| 1713 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_certificate, ERR_R_INTERNAL_ERROR); |
| 1714 | goto err; |
| 1715 | } |
| 1716 | if (CBS_len(&distinguished_name) != 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1717 | { |
| 1718 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
| 1719 | OPENSSL_PUT_ERROR(SSL, ssl3_get_certificate_request, SSL_R_CA_DN_LENGTH_MISMATCH); |
| 1720 | goto err; |
| 1721 | } |
| 1722 | if (!sk_X509_NAME_push(ca_sk,xn)) |
| 1723 | { |
| 1724 | OPENSSL_PUT_ERROR(SSL, ssl3_get_certificate_request, ERR_R_MALLOC_FAILURE); |
| 1725 | goto err; |
| 1726 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1727 | } |
| 1728 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1729 | /* we should setup a certificate to return.... */ |
| 1730 | s->s3->tmp.cert_req=1; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1731 | if (s->s3->tmp.ca_names != NULL) |
| 1732 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); |
| 1733 | s->s3->tmp.ca_names=ca_sk; |
| 1734 | ca_sk=NULL; |
| 1735 | |
| 1736 | ret=1; |
| 1737 | err: |
| 1738 | if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); |
| 1739 | return(ret); |
| 1740 | } |
| 1741 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1742 | int ssl3_get_new_session_ticket(SSL *s) |
| 1743 | { |
David Benjamin | e044c3d | 2014-07-14 19:14:12 -0400 | [diff] [blame] | 1744 | int ok,al,ret=0; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1745 | long n; |
David Benjamin | e044c3d | 2014-07-14 19:14:12 -0400 | [diff] [blame] | 1746 | CBS new_session_ticket, ticket; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1747 | |
| 1748 | n=s->method->ssl_get_message(s, |
| 1749 | SSL3_ST_CR_SESSION_TICKET_A, |
| 1750 | SSL3_ST_CR_SESSION_TICKET_B, |
David Benjamin | 6444287 | 2014-07-21 17:43:45 -0400 | [diff] [blame] | 1751 | SSL3_MT_NEWSESSION_TICKET, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1752 | 16384, |
David Benjamin | 590cbe9 | 2014-08-25 21:34:56 -0400 | [diff] [blame] | 1753 | SSL_GET_MESSAGE_HASH_MESSAGE, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1754 | &ok); |
| 1755 | |
| 1756 | if (!ok) |
| 1757 | return((int)n); |
| 1758 | |
David Benjamin | e044c3d | 2014-07-14 19:14:12 -0400 | [diff] [blame] | 1759 | CBS_init(&new_session_ticket, s->init_msg, n); |
| 1760 | |
| 1761 | if (!CBS_get_u32(&new_session_ticket, &s->session->tlsext_tick_lifetime_hint) || |
| 1762 | !CBS_get_u16_length_prefixed(&new_session_ticket, &ticket) || |
| 1763 | CBS_len(&new_session_ticket) != 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1764 | { |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1765 | al = SSL_AD_DECODE_ERROR; |
David Benjamin | e044c3d | 2014-07-14 19:14:12 -0400 | [diff] [blame] | 1766 | OPENSSL_PUT_ERROR(SSL, ssl3_get_new_session_ticket, SSL_R_DECODE_ERROR); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1767 | goto f_err; |
| 1768 | } |
| 1769 | |
David Benjamin | e044c3d | 2014-07-14 19:14:12 -0400 | [diff] [blame] | 1770 | if (!CBS_stow(&ticket, &s->session->tlsext_tick, &s->session->tlsext_ticklen)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1771 | { |
| 1772 | OPENSSL_PUT_ERROR(SSL, ssl3_get_new_session_ticket, ERR_R_MALLOC_FAILURE); |
| 1773 | goto err; |
| 1774 | } |
David Benjamin | e044c3d | 2014-07-14 19:14:12 -0400 | [diff] [blame] | 1775 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1776 | /* There are two ways to detect a resumed ticket sesion. |
| 1777 | * One is to set an appropriate session ID and then the server |
| 1778 | * must return a match in ServerHello. This allows the normal |
| 1779 | * client session ID matching to work and we know much |
| 1780 | * earlier that the ticket has been accepted. |
| 1781 | * |
| 1782 | * The other way is to set zero length session ID when the |
| 1783 | * ticket is presented and rely on the handshake to determine |
| 1784 | * session resumption. |
| 1785 | * |
| 1786 | * We choose the former approach because this fits in with |
| 1787 | * assumptions elsewhere in OpenSSL. The session ID is set |
| 1788 | * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the |
| 1789 | * ticket. |
| 1790 | */ |
David Benjamin | e044c3d | 2014-07-14 19:14:12 -0400 | [diff] [blame] | 1791 | EVP_Digest(CBS_data(&ticket), CBS_len(&ticket), |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1792 | s->session->session_id, &s->session->session_id_length, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1793 | EVP_sha256(), NULL); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1794 | ret=1; |
| 1795 | return(ret); |
| 1796 | f_err: |
| 1797 | ssl3_send_alert(s,SSL3_AL_FATAL,al); |
| 1798 | err: |
| 1799 | return(-1); |
| 1800 | } |
| 1801 | |
| 1802 | int ssl3_get_cert_status(SSL *s) |
| 1803 | { |
| 1804 | int ok, al; |
David Benjamin | 4606268 | 2014-07-14 19:14:32 -0400 | [diff] [blame] | 1805 | long n; |
| 1806 | CBS certificate_status, ocsp_response; |
| 1807 | uint8_t status_type; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1808 | |
| 1809 | n=s->method->ssl_get_message(s, |
| 1810 | SSL3_ST_CR_CERT_STATUS_A, |
| 1811 | SSL3_ST_CR_CERT_STATUS_B, |
| 1812 | SSL3_MT_CERTIFICATE_STATUS, |
| 1813 | 16384, |
David Benjamin | 590cbe9 | 2014-08-25 21:34:56 -0400 | [diff] [blame] | 1814 | SSL_GET_MESSAGE_HASH_MESSAGE, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1815 | &ok); |
| 1816 | |
| 1817 | if (!ok) return((int)n); |
David Benjamin | 4606268 | 2014-07-14 19:14:32 -0400 | [diff] [blame] | 1818 | |
| 1819 | CBS_init(&certificate_status, s->init_msg, n); |
| 1820 | if (!CBS_get_u8(&certificate_status, &status_type) || |
| 1821 | status_type != TLSEXT_STATUSTYPE_ocsp || |
| 1822 | !CBS_get_u24_length_prefixed(&certificate_status, &ocsp_response) || |
| 1823 | CBS_len(&ocsp_response) == 0 || |
| 1824 | CBS_len(&certificate_status) != 0) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1825 | { |
| 1826 | al = SSL_AD_DECODE_ERROR; |
David Benjamin | 4606268 | 2014-07-14 19:14:32 -0400 | [diff] [blame] | 1827 | OPENSSL_PUT_ERROR(SSL, ssl3_get_cert_status, SSL_R_DECODE_ERROR); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1828 | goto f_err; |
| 1829 | } |
David Benjamin | 4606268 | 2014-07-14 19:14:32 -0400 | [diff] [blame] | 1830 | |
David Benjamin | 6c7aed0 | 2014-08-27 16:42:38 -0400 | [diff] [blame] | 1831 | if (!CBS_stow(&ocsp_response, |
| 1832 | &s->session->ocsp_response, &s->session->ocsp_response_length)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1833 | { |
| 1834 | al = SSL_AD_INTERNAL_ERROR; |
| 1835 | OPENSSL_PUT_ERROR(SSL, ssl3_get_cert_status, ERR_R_MALLOC_FAILURE); |
| 1836 | goto f_err; |
| 1837 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1838 | return 1; |
| 1839 | f_err: |
| 1840 | ssl3_send_alert(s,SSL3_AL_FATAL,al); |
| 1841 | return(-1); |
| 1842 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1843 | |
| 1844 | int ssl3_get_server_done(SSL *s) |
| 1845 | { |
| 1846 | int ok,ret=0; |
| 1847 | long n; |
| 1848 | |
| 1849 | n=s->method->ssl_get_message(s, |
| 1850 | SSL3_ST_CR_SRVR_DONE_A, |
| 1851 | SSL3_ST_CR_SRVR_DONE_B, |
| 1852 | SSL3_MT_SERVER_DONE, |
| 1853 | 30, /* should be very small, like 0 :-) */ |
David Benjamin | 590cbe9 | 2014-08-25 21:34:56 -0400 | [diff] [blame] | 1854 | SSL_GET_MESSAGE_HASH_MESSAGE, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1855 | &ok); |
| 1856 | |
| 1857 | if (!ok) return((int)n); |
| 1858 | if (n > 0) |
| 1859 | { |
| 1860 | /* should contain no data */ |
| 1861 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); |
| 1862 | OPENSSL_PUT_ERROR(SSL, ssl3_get_server_done, SSL_R_LENGTH_MISMATCH); |
| 1863 | return -1; |
| 1864 | } |
| 1865 | ret=1; |
| 1866 | return(ret); |
| 1867 | } |
| 1868 | |
| 1869 | |
| 1870 | int ssl3_send_client_key_exchange(SSL *s) |
| 1871 | { |
| 1872 | unsigned char *p; |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1873 | int n = 0; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1874 | unsigned long alg_k; |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1875 | unsigned long alg_a; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1876 | unsigned char *q; |
| 1877 | EVP_PKEY *pkey=NULL; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1878 | EC_KEY *clnt_ecdh = NULL; |
| 1879 | const EC_POINT *srvr_ecpoint = NULL; |
| 1880 | EVP_PKEY *srvr_pub_pkey = NULL; |
| 1881 | unsigned char *encodedPoint = NULL; |
| 1882 | int encoded_pt_len = 0; |
| 1883 | BN_CTX * bn_ctx = NULL; |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1884 | unsigned int psk_len = 0; |
| 1885 | unsigned char psk[PSK_MAX_PSK_LEN]; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1886 | |
| 1887 | if (s->state == SSL3_ST_CW_KEY_EXCH_A) |
| 1888 | { |
| 1889 | p = ssl_handshake_start(s); |
| 1890 | |
| 1891 | alg_k=s->s3->tmp.new_cipher->algorithm_mkey; |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1892 | alg_a=s->s3->tmp.new_cipher->algorithm_auth; |
| 1893 | |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1894 | if (alg_a & SSL_aPSK) |
| 1895 | { |
Adam Langley | 01797e3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1896 | char identity[PSK_MAX_IDENTITY_LEN + 1]; |
| 1897 | size_t identity_len; |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1898 | unsigned char *t = NULL; |
| 1899 | unsigned char pre_ms[PSK_MAX_PSK_LEN*2+4]; |
| 1900 | unsigned int pre_ms_len = 0; |
| 1901 | int psk_err = 1; |
| 1902 | |
| 1903 | n = 0; |
| 1904 | if (s->psk_client_callback == NULL) |
| 1905 | { |
| 1906 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, SSL_R_PSK_NO_CLIENT_CB); |
| 1907 | goto err; |
| 1908 | } |
| 1909 | |
Adam Langley | 01797e3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1910 | memset(identity, 0, sizeof(identity)); |
Adam Langley | 0289c73 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1911 | psk_len = s->psk_client_callback(s, s->session->psk_identity_hint, |
Adam Langley | 01797e3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1912 | identity, sizeof(identity), psk, sizeof(psk)); |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1913 | if (psk_len > PSK_MAX_PSK_LEN) |
| 1914 | { |
| 1915 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_INTERNAL_ERROR); |
| 1916 | goto psk_err; |
| 1917 | } |
| 1918 | else if (psk_len == 0) |
| 1919 | { |
| 1920 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, SSL_R_PSK_IDENTITY_NOT_FOUND); |
| 1921 | goto psk_err; |
| 1922 | } |
Adam Langley | 01797e3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1923 | identity_len = OPENSSL_strnlen(identity, sizeof(identity)); |
| 1924 | if (identity_len > PSK_MAX_IDENTITY_LEN) |
| 1925 | { |
| 1926 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_INTERNAL_ERROR); |
| 1927 | goto psk_err; |
| 1928 | } |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1929 | |
| 1930 | if (!(alg_k & SSL_kEECDH)) |
| 1931 | { |
David Benjamin | 14c83e7 | 2014-07-13 04:54:57 -0400 | [diff] [blame] | 1932 | /* Create the shared secret now if we're not using ECDHE-PSK. |
| 1933 | * TODO(davidben): Refactor this logic similarly |
| 1934 | * to ssl3_get_client_key_exchange. */ |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1935 | pre_ms_len = 2+psk_len+2+psk_len; |
| 1936 | t = pre_ms; |
| 1937 | s2n(psk_len, t); |
| 1938 | memset(t, 0, psk_len); |
| 1939 | t+=psk_len; |
| 1940 | s2n(psk_len, t); |
| 1941 | memcpy(t, psk, psk_len); |
| 1942 | |
| 1943 | s->session->master_key_length = |
| 1944 | s->method->ssl3_enc->generate_master_secret(s, |
| 1945 | s->session->master_key, |
| 1946 | pre_ms, pre_ms_len); |
Adam Langley | 01797e3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1947 | s2n(identity_len, p); |
| 1948 | memcpy(p, identity, identity_len); |
| 1949 | n = 2 + identity_len; |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1950 | } |
| 1951 | |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1952 | if (s->session->psk_identity != NULL) |
| 1953 | OPENSSL_free(s->session->psk_identity); |
| 1954 | s->session->psk_identity = BUF_strdup(identity); |
| 1955 | if (s->session->psk_identity == NULL) |
| 1956 | { |
| 1957 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_MALLOC_FAILURE); |
| 1958 | goto psk_err; |
| 1959 | } |
| 1960 | psk_err = 0; |
| 1961 | psk_err: |
| 1962 | OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); |
| 1963 | OPENSSL_cleanse(pre_ms, sizeof(pre_ms)); |
| 1964 | if (psk_err != 0) |
| 1965 | { |
| 1966 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
| 1967 | goto err; |
| 1968 | } |
| 1969 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1970 | |
David Benjamin | 457112e | 2014-08-27 14:35:09 -0400 | [diff] [blame] | 1971 | if (alg_k & SSL_kRSA) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1972 | { |
| 1973 | RSA *rsa; |
| 1974 | unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; |
| 1975 | |
Emilia Käsper | c3d7960 | 2014-07-24 22:15:29 +0200 | [diff] [blame] | 1976 | if (s->session->sess_cert == NULL) |
| 1977 | { |
| 1978 | /* We should always have a server certificate with SSL_kRSA. */ |
| 1979 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_INTERNAL_ERROR); |
| 1980 | goto err; |
| 1981 | } |
| 1982 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 1983 | if (s->session->sess_cert->peer_rsa_tmp != NULL) |
| 1984 | rsa=s->session->sess_cert->peer_rsa_tmp; |
| 1985 | else |
| 1986 | { |
| 1987 | pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); |
| 1988 | if ((pkey == NULL) || |
| 1989 | (pkey->type != EVP_PKEY_RSA) || |
| 1990 | (pkey->pkey.rsa == NULL)) |
| 1991 | { |
| 1992 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_INTERNAL_ERROR); |
| 1993 | goto err; |
| 1994 | } |
| 1995 | rsa=pkey->pkey.rsa; |
| 1996 | EVP_PKEY_free(pkey); |
| 1997 | } |
| 1998 | |
| 1999 | tmp_buf[0]=s->client_version>>8; |
| 2000 | tmp_buf[1]=s->client_version&0xff; |
| 2001 | if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) |
| 2002 | goto err; |
| 2003 | |
| 2004 | s->session->master_key_length=sizeof tmp_buf; |
| 2005 | |
| 2006 | q=p; |
| 2007 | /* Fix buf for TLS and beyond */ |
| 2008 | if (s->version > SSL3_VERSION) |
| 2009 | p+=2; |
| 2010 | n=RSA_public_encrypt(sizeof tmp_buf, |
| 2011 | tmp_buf,p,rsa,RSA_PKCS1_PADDING); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2012 | if (n <= 0) |
| 2013 | { |
| 2014 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, SSL_R_BAD_RSA_ENCRYPT); |
| 2015 | goto err; |
| 2016 | } |
| 2017 | |
David Benjamin | 859ec3c | 2014-09-02 16:29:36 -0400 | [diff] [blame] | 2018 | /* Log the premaster secret, if logging is enabled. */ |
| 2019 | if (!ssl_ctx_log_rsa_client_key_exchange(s->ctx, |
| 2020 | p, n, tmp_buf, sizeof(tmp_buf))) |
| 2021 | { |
| 2022 | goto err; |
| 2023 | } |
| 2024 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2025 | /* Fix buf for TLS and beyond */ |
| 2026 | if (s->version > SSL3_VERSION) |
| 2027 | { |
| 2028 | s2n(n,q); |
| 2029 | n+=2; |
| 2030 | } |
| 2031 | |
| 2032 | s->session->master_key_length= |
| 2033 | s->method->ssl3_enc->generate_master_secret(s, |
| 2034 | s->session->master_key, |
| 2035 | tmp_buf,sizeof tmp_buf); |
| 2036 | OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); |
| 2037 | } |
David Benjamin | 0da0e18 | 2014-08-19 16:20:28 -0400 | [diff] [blame] | 2038 | else if (alg_k & SSL_kEDH) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2039 | { |
| 2040 | DH *dh_srvr,*dh_clnt; |
| 2041 | SESS_CERT *scert = s->session->sess_cert; |
| 2042 | |
| 2043 | if (scert == NULL) |
| 2044 | { |
| 2045 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); |
| 2046 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, SSL_R_UNEXPECTED_MESSAGE); |
| 2047 | goto err; |
| 2048 | } |
| 2049 | |
David Benjamin | 0da0e18 | 2014-08-19 16:20:28 -0400 | [diff] [blame] | 2050 | if (scert->peer_dh_tmp == NULL) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2051 | { |
David Benjamin | 0da0e18 | 2014-08-19 16:20:28 -0400 | [diff] [blame] | 2052 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_INTERNAL_ERROR); |
| 2053 | goto err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2054 | } |
David Benjamin | 0da0e18 | 2014-08-19 16:20:28 -0400 | [diff] [blame] | 2055 | dh_srvr=scert->peer_dh_tmp; |
| 2056 | |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2057 | /* generate a new random key */ |
| 2058 | if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2059 | { |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2060 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_DH_LIB); |
| 2061 | goto err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2062 | } |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2063 | if (!DH_generate_key(dh_clnt)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2064 | { |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2065 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_DH_LIB); |
| 2066 | DH_free(dh_clnt); |
| 2067 | goto err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2068 | } |
| 2069 | |
| 2070 | /* use the 'p' output buffer for the DH key, but |
| 2071 | * make sure to clear it out afterwards */ |
| 2072 | |
| 2073 | n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2074 | if (n <= 0) |
| 2075 | { |
| 2076 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_DH_LIB); |
| 2077 | DH_free(dh_clnt); |
| 2078 | goto err; |
| 2079 | } |
| 2080 | |
| 2081 | /* generate master key from the result */ |
| 2082 | s->session->master_key_length= |
| 2083 | s->method->ssl3_enc->generate_master_secret(s, |
| 2084 | s->session->master_key,p,n); |
| 2085 | /* clean up */ |
| 2086 | memset(p,0,n); |
| 2087 | |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2088 | /* send off the data */ |
| 2089 | n=BN_num_bytes(dh_clnt->pub_key); |
| 2090 | s2n(n,p); |
| 2091 | BN_bn2bin(dh_clnt->pub_key,p); |
| 2092 | n+=2; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2093 | |
| 2094 | DH_free(dh_clnt); |
| 2095 | |
| 2096 | /* perhaps clean things up a bit EAY EAY EAY EAY*/ |
| 2097 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2098 | |
David Benjamin | 0da0e18 | 2014-08-19 16:20:28 -0400 | [diff] [blame] | 2099 | else if (alg_k & SSL_kEECDH) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2100 | { |
| 2101 | const EC_GROUP *srvr_group = NULL; |
| 2102 | EC_KEY *tkey; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2103 | int field_size = 0; |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2104 | unsigned char *pre_ms; |
| 2105 | unsigned char *t; |
| 2106 | unsigned int pre_ms_len; |
| 2107 | unsigned int i; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2108 | |
Adam Langley | d06eddd | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2109 | if (s->session->sess_cert == NULL) |
| 2110 | { |
| 2111 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); |
| 2112 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, SSL_R_UNEXPECTED_MESSAGE); |
| 2113 | goto err; |
| 2114 | } |
| 2115 | |
David Benjamin | 0da0e18 | 2014-08-19 16:20:28 -0400 | [diff] [blame] | 2116 | if (s->session->sess_cert->peer_ecdh_tmp == NULL) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2117 | { |
David Benjamin | 0da0e18 | 2014-08-19 16:20:28 -0400 | [diff] [blame] | 2118 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_INTERNAL_ERROR); |
| 2119 | goto err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2120 | } |
David Benjamin | 0da0e18 | 2014-08-19 16:20:28 -0400 | [diff] [blame] | 2121 | tkey = s->session->sess_cert->peer_ecdh_tmp; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2122 | |
| 2123 | srvr_group = EC_KEY_get0_group(tkey); |
| 2124 | srvr_ecpoint = EC_KEY_get0_public_key(tkey); |
| 2125 | |
| 2126 | if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) |
| 2127 | { |
| 2128 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_INTERNAL_ERROR); |
| 2129 | goto err; |
| 2130 | } |
| 2131 | |
| 2132 | if ((clnt_ecdh=EC_KEY_new()) == NULL) |
| 2133 | { |
| 2134 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_MALLOC_FAILURE); |
| 2135 | goto err; |
| 2136 | } |
| 2137 | |
| 2138 | if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) |
| 2139 | { |
| 2140 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_EC_LIB); |
| 2141 | goto err; |
| 2142 | } |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2143 | /* Generate a new ECDH key pair */ |
| 2144 | if (!(EC_KEY_generate_key(clnt_ecdh))) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2145 | { |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2146 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_ECDH_LIB); |
| 2147 | goto err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2148 | } |
| 2149 | |
| 2150 | /* use the 'p' output buffer for the ECDH key, but |
| 2151 | * make sure to clear it out afterwards |
| 2152 | */ |
| 2153 | |
| 2154 | field_size = EC_GROUP_get_degree(srvr_group); |
| 2155 | if (field_size <= 0) |
| 2156 | { |
| 2157 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_ECDH_LIB); |
| 2158 | goto err; |
| 2159 | } |
| 2160 | n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); |
| 2161 | if (n <= 0) |
| 2162 | { |
| 2163 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_ECDH_LIB); |
| 2164 | goto err; |
| 2165 | } |
| 2166 | |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2167 | /* ECDHE PSK ciphersuites from RFC 5489 */ |
| 2168 | if ((alg_a & SSL_aPSK) && psk_len != 0) |
| 2169 | { |
| 2170 | pre_ms_len = 2+psk_len+2+n; |
| 2171 | pre_ms = OPENSSL_malloc(pre_ms_len); |
| 2172 | if (pre_ms == NULL) |
| 2173 | { |
| 2174 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_MALLOC_FAILURE); |
| 2175 | goto err; |
| 2176 | } |
| 2177 | memset(pre_ms, 0, pre_ms_len); |
| 2178 | t = pre_ms; |
| 2179 | s2n(psk_len, t); |
| 2180 | memcpy(t, psk, psk_len); |
| 2181 | t += psk_len; |
| 2182 | s2n(n, t); |
| 2183 | memcpy(t, p, n); |
| 2184 | s->session->master_key_length = s->method->ssl3_enc \ |
| 2185 | -> generate_master_secret(s, |
| 2186 | s->session->master_key, pre_ms, pre_ms_len); |
| 2187 | OPENSSL_cleanse(pre_ms, pre_ms_len); |
| 2188 | OPENSSL_free(pre_ms); |
| 2189 | } |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2190 | if (!(alg_a & SSL_aPSK)) |
| 2191 | { |
| 2192 | /* generate master key from the result */ |
| 2193 | s->session->master_key_length = s->method->ssl3_enc \ |
| 2194 | -> generate_master_secret(s, |
| 2195 | s->session->master_key, p, n); |
| 2196 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2197 | memset(p, 0, n); /* clean up */ |
| 2198 | |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2199 | /* First check the size of encoding and |
| 2200 | * allocate memory accordingly. |
| 2201 | */ |
| 2202 | encoded_pt_len = |
| 2203 | EC_POINT_point2oct(srvr_group, |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2204 | EC_KEY_get0_public_key(clnt_ecdh), |
| 2205 | POINT_CONVERSION_UNCOMPRESSED, |
| 2206 | NULL, 0, NULL); |
| 2207 | |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2208 | encodedPoint = (unsigned char *) |
| 2209 | OPENSSL_malloc(encoded_pt_len * |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2210 | sizeof(unsigned char)); |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2211 | bn_ctx = BN_CTX_new(); |
| 2212 | if ((encodedPoint == NULL) || |
| 2213 | (bn_ctx == NULL)) |
| 2214 | { |
| 2215 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_MALLOC_FAILURE); |
| 2216 | goto err; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2217 | } |
| 2218 | |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2219 | /* Encode the public key */ |
| 2220 | encoded_pt_len = EC_POINT_point2oct(srvr_group, |
| 2221 | EC_KEY_get0_public_key(clnt_ecdh), |
| 2222 | POINT_CONVERSION_UNCOMPRESSED, |
| 2223 | encodedPoint, encoded_pt_len, bn_ctx); |
| 2224 | |
| 2225 | n = 0; |
| 2226 | if ((alg_a & SSL_aPSK) && psk_len != 0) |
| 2227 | { |
| 2228 | i = strlen(s->session->psk_identity); |
| 2229 | s2n(i, p); |
| 2230 | memcpy(p, s->session->psk_identity, i); |
| 2231 | p += i; |
| 2232 | n = i + 2; |
| 2233 | } |
| 2234 | |
| 2235 | *p = encoded_pt_len; /* length of encoded point */ |
| 2236 | /* Encoded point will be copied here */ |
| 2237 | p += 1; |
| 2238 | n += 1; |
| 2239 | /* copy the point */ |
| 2240 | memcpy((unsigned char *)p, encodedPoint, encoded_pt_len); |
| 2241 | /* increment n to account for length field */ |
| 2242 | n += encoded_pt_len; |
| 2243 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2244 | /* Free allocated memory */ |
| 2245 | BN_CTX_free(bn_ctx); |
Adam Langley | b2cb0ec | 2014-09-02 14:28:49 -0700 | [diff] [blame] | 2246 | OPENSSL_free(encodedPoint); |
| 2247 | EC_KEY_free(clnt_ecdh); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2248 | EVP_PKEY_free(srvr_pub_pkey); |
| 2249 | } |
Adam Langley | c26c802 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2250 | else if (!(alg_k & SSL_kPSK) || ((alg_k & SSL_kPSK) && !(alg_a & SSL_aPSK))) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2251 | { |
| 2252 | ssl3_send_alert(s, SSL3_AL_FATAL, |
| 2253 | SSL_AD_HANDSHAKE_FAILURE); |
| 2254 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_key_exchange, ERR_R_INTERNAL_ERROR); |
| 2255 | goto err; |
| 2256 | } |
| 2257 | |
| 2258 | ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n); |
| 2259 | s->state=SSL3_ST_CW_KEY_EXCH_B; |
| 2260 | } |
| 2261 | |
| 2262 | /* SSL3_ST_CW_KEY_EXCH_B */ |
| 2263 | return ssl_do_write(s); |
| 2264 | err: |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2265 | BN_CTX_free(bn_ctx); |
| 2266 | if (encodedPoint != NULL) OPENSSL_free(encodedPoint); |
| 2267 | if (clnt_ecdh != NULL) |
| 2268 | EC_KEY_free(clnt_ecdh); |
| 2269 | EVP_PKEY_free(srvr_pub_pkey); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2270 | return(-1); |
| 2271 | } |
| 2272 | |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 2273 | int ssl3_send_cert_verify(SSL *s) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2274 | { |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2275 | unsigned char *buf, *p; |
David Benjamin | 854dd65 | 2014-08-26 00:32:30 -0400 | [diff] [blame] | 2276 | const EVP_MD *md = NULL; |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2277 | uint8_t digest[EVP_MAX_MD_SIZE]; |
David Benjamin | 854dd65 | 2014-08-26 00:32:30 -0400 | [diff] [blame] | 2278 | size_t digest_length; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2279 | EVP_PKEY *pkey; |
Adam Langley | aed2306 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2280 | EVP_PKEY_CTX *pctx = NULL; |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2281 | size_t signature_length = 0; |
| 2282 | unsigned long n = 0; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2283 | |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2284 | buf=(unsigned char *)s->init_buf->data; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2285 | |
| 2286 | if (s->state == SSL3_ST_CW_CERT_VRFY_A) |
| 2287 | { |
| 2288 | p= ssl_handshake_start(s); |
Adam Langley | aed2306 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2289 | pkey = s->cert->key->privatekey; |
David Benjamin | 854dd65 | 2014-08-26 00:32:30 -0400 | [diff] [blame] | 2290 | |
| 2291 | /* Write out the digest type if needbe. */ |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2292 | if (SSL_USE_SIGALGS(s)) |
| 2293 | { |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2294 | md = s->cert->key->digest; |
David Benjamin | 854dd65 | 2014-08-26 00:32:30 -0400 | [diff] [blame] | 2295 | if (!tls12_get_sigandhash(p, pkey, md)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2296 | { |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 2297 | OPENSSL_PUT_ERROR(SSL, ssl3_send_cert_verify, ERR_R_INTERNAL_ERROR); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2298 | goto err; |
| 2299 | } |
| 2300 | p += 2; |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2301 | n += 2; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2302 | } |
David Benjamin | 854dd65 | 2014-08-26 00:32:30 -0400 | [diff] [blame] | 2303 | |
| 2304 | /* Compute the digest. */ |
| 2305 | if (!ssl3_cert_verify_hash(s, digest, &digest_length, &md, pkey)) |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2306 | goto err; |
David Benjamin | 854dd65 | 2014-08-26 00:32:30 -0400 | [diff] [blame] | 2307 | |
| 2308 | /* The handshake buffer is no longer necessary. */ |
| 2309 | if (s->s3->handshake_buffer && !ssl3_digest_cached_records(s)) |
| 2310 | goto err; |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2311 | |
| 2312 | /* Sign the digest. */ |
| 2313 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
| 2314 | if (pctx == NULL) |
| 2315 | goto err; |
| 2316 | |
| 2317 | /* Initialize the EVP_PKEY_CTX and determine the size of the signature. */ |
David Benjamin | 854dd65 | 2014-08-26 00:32:30 -0400 | [diff] [blame] | 2318 | if (!EVP_PKEY_sign_init(pctx) || |
| 2319 | !EVP_PKEY_CTX_set_signature_md(pctx, md) || |
| 2320 | !EVP_PKEY_sign(pctx, NULL, &signature_length, |
| 2321 | digest, digest_length)) |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2322 | { |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 2323 | OPENSSL_PUT_ERROR(SSL, ssl3_send_cert_verify, ERR_R_EVP_LIB); |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2324 | goto err; |
| 2325 | } |
| 2326 | |
| 2327 | if (p + 2 + signature_length > buf + SSL3_RT_MAX_PLAIN_LENGTH) |
| 2328 | { |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 2329 | OPENSSL_PUT_ERROR(SSL, ssl3_send_cert_verify, SSL_R_DATA_LENGTH_TOO_LONG); |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2330 | goto err; |
| 2331 | } |
| 2332 | |
David Benjamin | 854dd65 | 2014-08-26 00:32:30 -0400 | [diff] [blame] | 2333 | if (!EVP_PKEY_sign(pctx, &p[2], &signature_length, |
| 2334 | digest, digest_length)) |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2335 | { |
David Benjamin | 8da9906 | 2014-08-24 12:03:09 -0400 | [diff] [blame] | 2336 | OPENSSL_PUT_ERROR(SSL, ssl3_send_cert_verify, ERR_R_EVP_LIB); |
David Benjamin | 0e2908a | 2014-07-09 15:22:43 -0400 | [diff] [blame] | 2337 | goto err; |
| 2338 | } |
| 2339 | |
| 2340 | s2n(signature_length, p); |
| 2341 | n += signature_length + 2; |
| 2342 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2343 | ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n); |
| 2344 | s->state=SSL3_ST_CW_CERT_VRFY_B; |
| 2345 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2346 | EVP_PKEY_CTX_free(pctx); |
| 2347 | return ssl_do_write(s); |
| 2348 | err: |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2349 | EVP_PKEY_CTX_free(pctx); |
| 2350 | return(-1); |
| 2351 | } |
| 2352 | |
| 2353 | /* Check a certificate can be used for client authentication. Currently |
David Benjamin | bd30f8e | 2014-08-19 16:02:38 -0400 | [diff] [blame] | 2354 | * check the cert exists and if we have a suitable digest for TLS 1.2. |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2355 | */ |
| 2356 | static int ssl3_check_client_certificate(SSL *s) |
| 2357 | { |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2358 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) |
| 2359 | return 0; |
| 2360 | /* If no suitable signature algorithm can't use certificate */ |
| 2361 | if (SSL_USE_SIGALGS(s) && !s->cert->key->digest) |
| 2362 | return 0; |
| 2363 | /* If strict mode check suitability of chain before using it. |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2364 | */ |
| 2365 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && |
| 2366 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) |
| 2367 | return 0; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2368 | return 1; |
| 2369 | } |
| 2370 | |
| 2371 | int ssl3_send_client_certificate(SSL *s) |
| 2372 | { |
| 2373 | X509 *x509=NULL; |
| 2374 | EVP_PKEY *pkey=NULL; |
| 2375 | int i; |
| 2376 | |
| 2377 | if (s->state == SSL3_ST_CW_CERT_A) |
| 2378 | { |
| 2379 | /* Let cert callback update client certificates if required */ |
| 2380 | if (s->cert->cert_cb) |
| 2381 | { |
| 2382 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); |
| 2383 | if (i < 0) |
| 2384 | { |
| 2385 | s->rwstate=SSL_X509_LOOKUP; |
| 2386 | return -1; |
| 2387 | } |
| 2388 | if (i == 0) |
| 2389 | { |
| 2390 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR); |
| 2391 | return 0; |
| 2392 | } |
| 2393 | s->rwstate=SSL_NOTHING; |
| 2394 | } |
| 2395 | if (ssl3_check_client_certificate(s)) |
| 2396 | s->state=SSL3_ST_CW_CERT_C; |
| 2397 | else |
| 2398 | s->state=SSL3_ST_CW_CERT_B; |
| 2399 | } |
| 2400 | |
| 2401 | /* We need to get a client cert */ |
| 2402 | if (s->state == SSL3_ST_CW_CERT_B) |
| 2403 | { |
| 2404 | /* If we get an error, we need to |
| 2405 | * ssl->rwstate=SSL_X509_LOOKUP; return(-1); |
David Benjamin | 7bbeead | 2014-07-25 03:56:20 -0400 | [diff] [blame] | 2406 | * We then get retried later */ |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2407 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
| 2408 | if (i < 0) |
| 2409 | { |
| 2410 | s->rwstate=SSL_X509_LOOKUP; |
| 2411 | return(-1); |
| 2412 | } |
| 2413 | s->rwstate=SSL_NOTHING; |
| 2414 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) |
| 2415 | { |
| 2416 | s->state=SSL3_ST_CW_CERT_B; |
| 2417 | if ( !SSL_use_certificate(s,x509) || |
| 2418 | !SSL_use_PrivateKey(s,pkey)) |
| 2419 | i=0; |
| 2420 | } |
| 2421 | else if (i == 1) |
| 2422 | { |
| 2423 | i=0; |
HÃ¥vard Molland | 90974e7 | 2014-08-11 15:50:54 +0200 | [diff] [blame] | 2424 | OPENSSL_PUT_ERROR(SSL, ssl3_send_client_certificate, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2425 | } |
| 2426 | |
| 2427 | if (x509 != NULL) X509_free(x509); |
| 2428 | if (pkey != NULL) EVP_PKEY_free(pkey); |
| 2429 | if (i && !ssl3_check_client_certificate(s)) |
| 2430 | i = 0; |
| 2431 | if (i == 0) |
| 2432 | { |
| 2433 | if (s->version == SSL3_VERSION) |
| 2434 | { |
| 2435 | s->s3->tmp.cert_req=0; |
| 2436 | ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); |
| 2437 | return(1); |
| 2438 | } |
| 2439 | else |
| 2440 | { |
| 2441 | s->s3->tmp.cert_req=2; |
| 2442 | } |
| 2443 | } |
| 2444 | |
| 2445 | /* Ok, we have a cert */ |
| 2446 | s->state=SSL3_ST_CW_CERT_C; |
| 2447 | } |
| 2448 | |
| 2449 | if (s->state == SSL3_ST_CW_CERT_C) |
| 2450 | { |
| 2451 | s->state=SSL3_ST_CW_CERT_D; |
| 2452 | ssl3_output_cert_chain(s, |
| 2453 | (s->s3->tmp.cert_req == 2)?NULL:s->cert->key); |
| 2454 | } |
| 2455 | /* SSL3_ST_CW_CERT_D */ |
| 2456 | return ssl_do_write(s); |
| 2457 | } |
| 2458 | |
| 2459 | #define has_bits(i,m) (((i)&(m)) == (m)) |
| 2460 | |
| 2461 | int ssl3_check_cert_and_algorithm(SSL *s) |
| 2462 | { |
| 2463 | int i,idx; |
| 2464 | long alg_k,alg_a; |
| 2465 | EVP_PKEY *pkey=NULL; |
| 2466 | SESS_CERT *sc; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2467 | RSA *rsa; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2468 | DH *dh; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2469 | |
David Benjamin | e8f3d66 | 2014-07-12 01:10:19 -0400 | [diff] [blame] | 2470 | /* we don't have a certificate */ |
| 2471 | if (!ssl_cipher_has_server_public_key(s->s3->tmp.new_cipher)) |
| 2472 | return 1; |
| 2473 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2474 | alg_k=s->s3->tmp.new_cipher->algorithm_mkey; |
| 2475 | alg_a=s->s3->tmp.new_cipher->algorithm_auth; |
| 2476 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2477 | sc=s->session->sess_cert; |
| 2478 | if (sc == NULL) |
| 2479 | { |
HÃ¥vard Molland | 90974e7 | 2014-08-11 15:50:54 +0200 | [diff] [blame] | 2480 | OPENSSL_PUT_ERROR(SSL, ssl3_check_cert_and_algorithm, ERR_R_INTERNAL_ERROR); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2481 | goto err; |
| 2482 | } |
| 2483 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2484 | rsa=s->session->sess_cert->peer_rsa_tmp; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2485 | dh=s->session->sess_cert->peer_dh_tmp; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2486 | |
| 2487 | /* This is the passed certificate */ |
| 2488 | |
| 2489 | idx=sc->peer_cert_type; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2490 | if (idx == SSL_PKEY_ECC) |
| 2491 | { |
| 2492 | if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, |
| 2493 | s) == 0) |
| 2494 | { /* check failed */ |
HÃ¥vard Molland | 90974e7 | 2014-08-11 15:50:54 +0200 | [diff] [blame] | 2495 | OPENSSL_PUT_ERROR(SSL, ssl3_check_cert_and_algorithm, SSL_R_BAD_ECC_CERT); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2496 | goto f_err; |
| 2497 | } |
| 2498 | else |
| 2499 | { |
| 2500 | return 1; |
| 2501 | } |
| 2502 | } |
| 2503 | else if (alg_a & SSL_aECDSA) |
| 2504 | { |
HÃ¥vard Molland | 90974e7 | 2014-08-11 15:50:54 +0200 | [diff] [blame] | 2505 | OPENSSL_PUT_ERROR(SSL, ssl3_check_cert_and_algorithm, SSL_R_MISSING_ECDSA_SIGNING_CERT); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2506 | goto f_err; |
| 2507 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2508 | pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); |
| 2509 | i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); |
| 2510 | EVP_PKEY_free(pkey); |
| 2511 | |
| 2512 | |
| 2513 | /* Check that we have a certificate if we require one */ |
| 2514 | if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) |
| 2515 | { |
HÃ¥vard Molland | 90974e7 | 2014-08-11 15:50:54 +0200 | [diff] [blame] | 2516 | OPENSSL_PUT_ERROR(SSL, ssl3_check_cert_and_algorithm, SSL_R_MISSING_RSA_SIGNING_CERT); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2517 | goto f_err; |
| 2518 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2519 | if ((alg_k & SSL_kRSA) && |
| 2520 | !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) |
| 2521 | { |
HÃ¥vard Molland | 90974e7 | 2014-08-11 15:50:54 +0200 | [diff] [blame] | 2522 | OPENSSL_PUT_ERROR(SSL, ssl3_check_cert_and_algorithm, SSL_R_MISSING_RSA_ENCRYPTING_CERT); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2523 | goto f_err; |
| 2524 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2525 | if ((alg_k & SSL_kEDH) && |
| 2526 | !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) |
| 2527 | { |
HÃ¥vard Molland | 90974e7 | 2014-08-11 15:50:54 +0200 | [diff] [blame] | 2528 | OPENSSL_PUT_ERROR(SSL, ssl3_check_cert_and_algorithm, SSL_R_MISSING_DH_KEY); |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2529 | goto f_err; |
| 2530 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2531 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2532 | return(1); |
| 2533 | f_err: |
| 2534 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); |
| 2535 | err: |
| 2536 | return(0); |
| 2537 | } |
| 2538 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2539 | int ssl3_send_next_proto(SSL *s) |
| 2540 | { |
| 2541 | unsigned int len, padding_len; |
| 2542 | unsigned char *d; |
| 2543 | |
| 2544 | if (s->state == SSL3_ST_CW_NEXT_PROTO_A) |
| 2545 | { |
| 2546 | len = s->next_proto_negotiated_len; |
| 2547 | padding_len = 32 - ((len + 2) % 32); |
| 2548 | d = (unsigned char *)s->init_buf->data; |
| 2549 | d[4] = len; |
| 2550 | memcpy(d + 5, s->next_proto_negotiated, len); |
| 2551 | d[5 + len] = padding_len; |
| 2552 | memset(d + 6 + len, 0, padding_len); |
| 2553 | *(d++)=SSL3_MT_NEXT_PROTO; |
| 2554 | l2n3(2 + len + padding_len, d); |
| 2555 | s->state = SSL3_ST_CW_NEXT_PROTO_B; |
| 2556 | s->init_num = 4 + 2 + len + padding_len; |
| 2557 | s->init_off = 0; |
| 2558 | } |
| 2559 | |
| 2560 | return ssl3_do_write(s, SSL3_RT_HANDSHAKE); |
| 2561 | } |
Adam Langley | 1258b6a | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2562 | |
Adam Langley | 1258b6a | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2563 | |
| 2564 | int ssl3_send_channel_id(SSL *s) |
| 2565 | { |
| 2566 | unsigned char *d; |
| 2567 | int ret = -1, public_key_len; |
| 2568 | EVP_MD_CTX md_ctx; |
| 2569 | size_t sig_len; |
| 2570 | ECDSA_SIG *sig = NULL; |
| 2571 | unsigned char *public_key = NULL, *derp, *der_sig = NULL; |
| 2572 | |
| 2573 | if (s->state != SSL3_ST_CW_CHANNEL_ID_A) |
| 2574 | return ssl3_do_write(s, SSL3_RT_HANDSHAKE); |
| 2575 | |
| 2576 | if (!s->tlsext_channel_id_private && s->ctx->channel_id_cb) |
| 2577 | { |
| 2578 | EVP_PKEY *key = NULL; |
| 2579 | s->ctx->channel_id_cb(s, &key); |
| 2580 | if (key != NULL) |
| 2581 | { |
| 2582 | s->tlsext_channel_id_private = key; |
| 2583 | } |
| 2584 | } |
| 2585 | if (!s->tlsext_channel_id_private) |
| 2586 | { |
| 2587 | s->rwstate=SSL_CHANNEL_ID_LOOKUP; |
| 2588 | return (-1); |
| 2589 | } |
| 2590 | s->rwstate=SSL_NOTHING; |
| 2591 | |
| 2592 | d = (unsigned char *)s->init_buf->data; |
| 2593 | *(d++)=SSL3_MT_ENCRYPTED_EXTENSIONS; |
| 2594 | l2n3(2 + 2 + TLSEXT_CHANNEL_ID_SIZE, d); |
| 2595 | if (s->s3->tlsext_channel_id_new) |
| 2596 | s2n(TLSEXT_TYPE_channel_id_new, d); |
| 2597 | else |
| 2598 | s2n(TLSEXT_TYPE_channel_id, d); |
| 2599 | s2n(TLSEXT_CHANNEL_ID_SIZE, d); |
| 2600 | |
| 2601 | EVP_MD_CTX_init(&md_ctx); |
| 2602 | |
| 2603 | public_key_len = i2d_PublicKey(s->tlsext_channel_id_private, NULL); |
| 2604 | if (public_key_len <= 0) |
| 2605 | { |
| 2606 | OPENSSL_PUT_ERROR(SSL, ssl3_send_channel_id, SSL_R_CANNOT_SERIALIZE_PUBLIC_KEY); |
| 2607 | goto err; |
| 2608 | } |
| 2609 | /* i2d_PublicKey will produce an ANSI X9.62 public key which, for a |
| 2610 | * P-256 key, is 0x04 (meaning uncompressed) followed by the x and y |
| 2611 | * field elements as 32-byte, big-endian numbers. */ |
| 2612 | if (public_key_len != 65) |
| 2613 | { |
| 2614 | OPENSSL_PUT_ERROR(SSL, ssl3_send_channel_id, SSL_R_CHANNEL_ID_NOT_P256); |
| 2615 | goto err; |
| 2616 | } |
| 2617 | public_key = OPENSSL_malloc(public_key_len); |
| 2618 | if (!public_key) |
| 2619 | { |
| 2620 | OPENSSL_PUT_ERROR(SSL, ssl3_send_channel_id, ERR_R_MALLOC_FAILURE); |
| 2621 | goto err; |
| 2622 | } |
| 2623 | |
| 2624 | derp = public_key; |
| 2625 | i2d_PublicKey(s->tlsext_channel_id_private, &derp); |
| 2626 | |
| 2627 | if (EVP_DigestSignInit(&md_ctx, NULL, EVP_sha256(), NULL, |
| 2628 | s->tlsext_channel_id_private) != 1) |
| 2629 | { |
| 2630 | OPENSSL_PUT_ERROR(SSL, ssl3_send_channel_id, SSL_R_EVP_DIGESTSIGNINIT_FAILED); |
| 2631 | goto err; |
| 2632 | } |
| 2633 | |
| 2634 | if (!tls1_channel_id_hash(&md_ctx, s)) |
| 2635 | goto err; |
| 2636 | |
| 2637 | if (!EVP_DigestSignFinal(&md_ctx, NULL, &sig_len)) |
| 2638 | { |
| 2639 | OPENSSL_PUT_ERROR(SSL, ssl3_send_channel_id, SSL_R_EVP_DIGESTSIGNFINAL_FAILED); |
| 2640 | goto err; |
| 2641 | } |
| 2642 | |
| 2643 | der_sig = OPENSSL_malloc(sig_len); |
| 2644 | if (!der_sig) |
| 2645 | { |
| 2646 | OPENSSL_PUT_ERROR(SSL, ssl3_send_channel_id, ERR_R_MALLOC_FAILURE); |
| 2647 | goto err; |
| 2648 | } |
| 2649 | |
| 2650 | if (!EVP_DigestSignFinal(&md_ctx, der_sig, &sig_len)) |
| 2651 | { |
| 2652 | OPENSSL_PUT_ERROR(SSL, ssl3_send_channel_id, SSL_R_EVP_DIGESTSIGNFINAL_FAILED); |
| 2653 | goto err; |
| 2654 | } |
| 2655 | |
| 2656 | derp = der_sig; |
| 2657 | sig = d2i_ECDSA_SIG(NULL, (const unsigned char**) &derp, sig_len); |
| 2658 | if (sig == NULL) |
| 2659 | { |
| 2660 | OPENSSL_PUT_ERROR(SSL, ssl3_send_channel_id, SSL_R_D2I_ECDSA_SIG); |
| 2661 | goto err; |
| 2662 | } |
| 2663 | |
| 2664 | /* The first byte of public_key will be 0x4, denoting an uncompressed key. */ |
| 2665 | memcpy(d, public_key + 1, 64); |
| 2666 | d += 64; |
| 2667 | memset(d, 0, 2 * 32); |
| 2668 | BN_bn2bin(sig->r, d + 32 - BN_num_bytes(sig->r)); |
| 2669 | d += 32; |
| 2670 | BN_bn2bin(sig->s, d + 32 - BN_num_bytes(sig->s)); |
| 2671 | d += 32; |
| 2672 | |
| 2673 | s->state = SSL3_ST_CW_CHANNEL_ID_B; |
| 2674 | s->init_num = 4 + 2 + 2 + TLSEXT_CHANNEL_ID_SIZE; |
| 2675 | s->init_off = 0; |
| 2676 | |
| 2677 | ret = ssl3_do_write(s, SSL3_RT_HANDSHAKE); |
| 2678 | |
| 2679 | err: |
| 2680 | EVP_MD_CTX_cleanup(&md_ctx); |
| 2681 | if (public_key) |
| 2682 | OPENSSL_free(public_key); |
| 2683 | if (der_sig) |
| 2684 | OPENSSL_free(der_sig); |
| 2685 | if (sig) |
| 2686 | ECDSA_SIG_free(sig); |
| 2687 | |
| 2688 | return ret; |
| 2689 | } |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2690 | |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2691 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) |
| 2692 | { |
| 2693 | int i = 0; |
Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame] | 2694 | if (s->ctx->client_cert_cb) |
| 2695 | i = s->ctx->client_cert_cb(s,px509,ppkey); |
| 2696 | return i; |
| 2697 | } |