Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* ssl/s2_srvr.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) 1998-2001 The OpenSSL Project. All rights reserved. |
| 60 | * |
| 61 | * Redistribution and use in source and binary forms, with or without |
| 62 | * modification, are permitted provided that the following conditions |
| 63 | * are met: |
| 64 | * |
| 65 | * 1. Redistributions of source code must retain the above copyright |
| 66 | * notice, this list of conditions and the following disclaimer. |
| 67 | * |
| 68 | * 2. Redistributions in binary form must reproduce the above copyright |
| 69 | * notice, this list of conditions and the following disclaimer in |
| 70 | * the documentation and/or other materials provided with the |
| 71 | * distribution. |
| 72 | * |
| 73 | * 3. All advertising materials mentioning features or use of this |
| 74 | * software must display the following acknowledgment: |
| 75 | * "This product includes software developed by the OpenSSL Project |
| 76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| 77 | * |
| 78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 79 | * endorse or promote products derived from this software without |
| 80 | * prior written permission. For written permission, please contact |
| 81 | * openssl-core@openssl.org. |
| 82 | * |
| 83 | * 5. Products derived from this software may not be called "OpenSSL" |
| 84 | * nor may "OpenSSL" appear in their names without prior written |
| 85 | * permission of the OpenSSL Project. |
| 86 | * |
| 87 | * 6. Redistributions of any form whatsoever must retain the following |
| 88 | * acknowledgment: |
| 89 | * "This product includes software developed by the OpenSSL Project |
| 90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 91 | * |
| 92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 103 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 104 | * ==================================================================== |
| 105 | * |
| 106 | * This product includes cryptographic software written by Eric Young |
| 107 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 108 | * Hudson (tjh@cryptsoft.com). |
| 109 | * |
| 110 | */ |
| 111 | |
| 112 | #include "ssl_locl.h" |
| 113 | #ifndef OPENSSL_NO_SSL2 |
| 114 | #include <stdio.h> |
| 115 | #include <openssl/bio.h> |
| 116 | #include <openssl/rand.h> |
| 117 | #include <openssl/objects.h> |
| 118 | #include <openssl/evp.h> |
| 119 | |
| 120 | static const SSL_METHOD *ssl2_get_server_method(int ver); |
| 121 | static int get_client_master_key(SSL *s); |
| 122 | static int get_client_hello(SSL *s); |
| 123 | static int server_hello(SSL *s); |
| 124 | static int get_client_finished(SSL *s); |
| 125 | static int server_verify(SSL *s); |
| 126 | static int server_finish(SSL *s); |
| 127 | static int request_certificate(SSL *s); |
| 128 | static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, |
| 129 | unsigned char *to,int padding); |
| 130 | #define BREAK break |
| 131 | |
| 132 | static const SSL_METHOD *ssl2_get_server_method(int ver) |
| 133 | { |
| 134 | if (ver == SSL2_VERSION) |
| 135 | return(SSLv2_server_method()); |
| 136 | else |
| 137 | return(NULL); |
| 138 | } |
| 139 | |
| 140 | IMPLEMENT_ssl2_meth_func(SSLv2_server_method, |
| 141 | ssl2_accept, |
| 142 | ssl_undefined_function, |
| 143 | ssl2_get_server_method) |
| 144 | |
| 145 | int ssl2_accept(SSL *s) |
| 146 | { |
| 147 | unsigned long l=(unsigned long)time(NULL); |
| 148 | BUF_MEM *buf=NULL; |
| 149 | int ret= -1; |
| 150 | long num1; |
| 151 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
| 152 | int new_state,state; |
| 153 | |
| 154 | RAND_add(&l,sizeof(l),0); |
| 155 | ERR_clear_error(); |
| 156 | clear_sys_error(); |
| 157 | |
| 158 | if (s->info_callback != NULL) |
| 159 | cb=s->info_callback; |
| 160 | else if (s->ctx->info_callback != NULL) |
| 161 | cb=s->ctx->info_callback; |
| 162 | |
| 163 | /* init things to blank */ |
| 164 | s->in_handshake++; |
| 165 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
| 166 | |
| 167 | if (s->cert == NULL) |
| 168 | { |
| 169 | SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET); |
| 170 | return(-1); |
| 171 | } |
| 172 | |
| 173 | clear_sys_error(); |
| 174 | for (;;) |
| 175 | { |
| 176 | state=s->state; |
| 177 | |
| 178 | switch (s->state) |
| 179 | { |
| 180 | case SSL_ST_BEFORE: |
| 181 | case SSL_ST_ACCEPT: |
| 182 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: |
| 183 | case SSL_ST_OK|SSL_ST_ACCEPT: |
| 184 | |
| 185 | s->server=1; |
| 186 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
| 187 | |
| 188 | s->version=SSL2_VERSION; |
| 189 | s->type=SSL_ST_ACCEPT; |
| 190 | |
| 191 | buf=s->init_buf; |
| 192 | if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL)) |
| 193 | { ret= -1; goto end; } |
| 194 | if (!BUF_MEM_grow(buf,(int) |
| 195 | SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) |
| 196 | { ret= -1; goto end; } |
| 197 | s->init_buf=buf; |
| 198 | s->init_num=0; |
| 199 | s->ctx->stats.sess_accept++; |
| 200 | s->handshake_func=ssl2_accept; |
| 201 | s->state=SSL2_ST_GET_CLIENT_HELLO_A; |
| 202 | BREAK; |
| 203 | |
| 204 | case SSL2_ST_GET_CLIENT_HELLO_A: |
| 205 | case SSL2_ST_GET_CLIENT_HELLO_B: |
| 206 | case SSL2_ST_GET_CLIENT_HELLO_C: |
| 207 | s->shutdown=0; |
| 208 | ret=get_client_hello(s); |
| 209 | if (ret <= 0) goto end; |
| 210 | s->init_num=0; |
| 211 | s->state=SSL2_ST_SEND_SERVER_HELLO_A; |
| 212 | BREAK; |
| 213 | |
| 214 | case SSL2_ST_SEND_SERVER_HELLO_A: |
| 215 | case SSL2_ST_SEND_SERVER_HELLO_B: |
| 216 | ret=server_hello(s); |
| 217 | if (ret <= 0) goto end; |
| 218 | s->init_num=0; |
| 219 | if (!s->hit) |
| 220 | { |
| 221 | s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A; |
| 222 | BREAK; |
| 223 | } |
| 224 | else |
| 225 | { |
| 226 | s->state=SSL2_ST_SERVER_START_ENCRYPTION; |
| 227 | BREAK; |
| 228 | } |
| 229 | case SSL2_ST_GET_CLIENT_MASTER_KEY_A: |
| 230 | case SSL2_ST_GET_CLIENT_MASTER_KEY_B: |
| 231 | ret=get_client_master_key(s); |
| 232 | if (ret <= 0) goto end; |
| 233 | s->init_num=0; |
| 234 | s->state=SSL2_ST_SERVER_START_ENCRYPTION; |
| 235 | BREAK; |
| 236 | |
| 237 | case SSL2_ST_SERVER_START_ENCRYPTION: |
| 238 | /* Ok we how have sent all the stuff needed to |
| 239 | * start encrypting, the next packet back will |
| 240 | * be encrypted. */ |
| 241 | if (!ssl2_enc_init(s,0)) |
| 242 | { ret= -1; goto end; } |
| 243 | s->s2->clear_text=0; |
| 244 | s->state=SSL2_ST_SEND_SERVER_VERIFY_A; |
| 245 | BREAK; |
| 246 | |
| 247 | case SSL2_ST_SEND_SERVER_VERIFY_A: |
| 248 | case SSL2_ST_SEND_SERVER_VERIFY_B: |
| 249 | ret=server_verify(s); |
| 250 | if (ret <= 0) goto end; |
| 251 | s->init_num=0; |
| 252 | if (s->hit) |
| 253 | { |
| 254 | /* If we are in here, we have been |
| 255 | * buffering the output, so we need to |
| 256 | * flush it and remove buffering from |
| 257 | * future traffic */ |
| 258 | s->state=SSL2_ST_SEND_SERVER_VERIFY_C; |
| 259 | BREAK; |
| 260 | } |
| 261 | else |
| 262 | { |
| 263 | s->state=SSL2_ST_GET_CLIENT_FINISHED_A; |
| 264 | break; |
| 265 | } |
| 266 | |
| 267 | case SSL2_ST_SEND_SERVER_VERIFY_C: |
| 268 | /* get the number of bytes to write */ |
| 269 | num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); |
| 270 | if (num1 > 0) |
| 271 | { |
| 272 | s->rwstate=SSL_WRITING; |
| 273 | num1=BIO_flush(s->wbio); |
| 274 | if (num1 <= 0) { ret= -1; goto end; } |
| 275 | s->rwstate=SSL_NOTHING; |
| 276 | } |
| 277 | |
| 278 | /* flushed and now remove buffering */ |
| 279 | s->wbio=BIO_pop(s->wbio); |
| 280 | |
| 281 | s->state=SSL2_ST_GET_CLIENT_FINISHED_A; |
| 282 | BREAK; |
| 283 | |
| 284 | case SSL2_ST_GET_CLIENT_FINISHED_A: |
| 285 | case SSL2_ST_GET_CLIENT_FINISHED_B: |
| 286 | ret=get_client_finished(s); |
| 287 | if (ret <= 0) |
| 288 | goto end; |
| 289 | s->init_num=0; |
| 290 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A; |
| 291 | BREAK; |
| 292 | |
| 293 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_A: |
| 294 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_B: |
| 295 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_C: |
| 296 | case SSL2_ST_SEND_REQUEST_CERTIFICATE_D: |
| 297 | /* don't do a 'request certificate' if we |
| 298 | * don't want to, or we already have one, and |
| 299 | * we only want to do it once. */ |
| 300 | if (!(s->verify_mode & SSL_VERIFY_PEER) || |
| 301 | ((s->session->peer != NULL) && |
| 302 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE))) |
| 303 | { |
| 304 | s->state=SSL2_ST_SEND_SERVER_FINISHED_A; |
| 305 | break; |
| 306 | } |
| 307 | else |
| 308 | { |
| 309 | ret=request_certificate(s); |
| 310 | if (ret <= 0) goto end; |
| 311 | s->init_num=0; |
| 312 | s->state=SSL2_ST_SEND_SERVER_FINISHED_A; |
| 313 | } |
| 314 | BREAK; |
| 315 | |
| 316 | case SSL2_ST_SEND_SERVER_FINISHED_A: |
| 317 | case SSL2_ST_SEND_SERVER_FINISHED_B: |
| 318 | ret=server_finish(s); |
| 319 | if (ret <= 0) goto end; |
| 320 | s->init_num=0; |
| 321 | s->state=SSL_ST_OK; |
| 322 | break; |
| 323 | |
| 324 | case SSL_ST_OK: |
| 325 | BUF_MEM_free(s->init_buf); |
| 326 | ssl_free_wbio_buffer(s); |
| 327 | s->init_buf=NULL; |
| 328 | s->init_num=0; |
| 329 | /* ERR_clear_error();*/ |
| 330 | |
| 331 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); |
| 332 | |
| 333 | s->ctx->stats.sess_accept_good++; |
| 334 | /* s->server=1; */ |
| 335 | ret=1; |
| 336 | |
| 337 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
| 338 | |
| 339 | goto end; |
| 340 | /* BREAK; */ |
| 341 | |
| 342 | default: |
| 343 | SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE); |
| 344 | ret= -1; |
| 345 | goto end; |
| 346 | /* BREAK; */ |
| 347 | } |
| 348 | |
| 349 | if ((cb != NULL) && (s->state != state)) |
| 350 | { |
| 351 | new_state=s->state; |
| 352 | s->state=state; |
| 353 | cb(s,SSL_CB_ACCEPT_LOOP,1); |
| 354 | s->state=new_state; |
| 355 | } |
| 356 | } |
| 357 | end: |
| 358 | s->in_handshake--; |
| 359 | if (cb != NULL) |
| 360 | cb(s,SSL_CB_ACCEPT_EXIT,ret); |
| 361 | return(ret); |
| 362 | } |
| 363 | |
| 364 | static int get_client_master_key(SSL *s) |
| 365 | { |
| 366 | int is_export,i,n,keya,ek; |
| 367 | unsigned long len; |
| 368 | unsigned char *p; |
| 369 | const SSL_CIPHER *cp; |
| 370 | const EVP_CIPHER *c; |
| 371 | const EVP_MD *md; |
| 372 | |
| 373 | p=(unsigned char *)s->init_buf->data; |
| 374 | if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A) |
| 375 | { |
| 376 | i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num); |
| 377 | |
| 378 | if (i < (10-s->init_num)) |
| 379 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i)); |
| 380 | s->init_num = 10; |
| 381 | |
| 382 | if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY) |
| 383 | { |
| 384 | if (p[-1] != SSL2_MT_ERROR) |
| 385 | { |
| 386 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 387 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE); |
| 388 | } |
| 389 | else |
| 390 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR); |
| 391 | return(-1); |
| 392 | } |
| 393 | |
| 394 | cp=ssl2_get_cipher_by_char(p); |
| 395 | if (cp == NULL) |
| 396 | { |
| 397 | ssl2_return_error(s,SSL2_PE_NO_CIPHER); |
| 398 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH); |
| 399 | return(-1); |
| 400 | } |
| 401 | s->session->cipher= cp; |
| 402 | |
| 403 | p+=3; |
| 404 | n2s(p,i); s->s2->tmp.clear=i; |
| 405 | n2s(p,i); s->s2->tmp.enc=i; |
| 406 | n2s(p,i); |
| 407 | if(i > SSL_MAX_KEY_ARG_LENGTH) |
| 408 | { |
| 409 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 410 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG); |
| 411 | return -1; |
| 412 | } |
| 413 | s->session->key_arg_length=i; |
| 414 | s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B; |
| 415 | } |
| 416 | |
| 417 | /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */ |
| 418 | p=(unsigned char *)s->init_buf->data; |
| 419 | if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) |
| 420 | { |
| 421 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 422 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); |
| 423 | return -1; |
| 424 | } |
| 425 | keya=s->session->key_arg_length; |
| 426 | len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya; |
| 427 | if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) |
| 428 | { |
| 429 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 430 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG); |
| 431 | return -1; |
| 432 | } |
| 433 | n = (int)len - s->init_num; |
| 434 | i = ssl2_read(s,(char *)&(p[s->init_num]),n); |
| 435 | if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i)); |
| 436 | if (s->msg_callback) |
| 437 | s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */ |
| 438 | p += 10; |
| 439 | |
| 440 | memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]), |
| 441 | (unsigned int)keya); |
| 442 | |
| 443 | if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) |
| 444 | { |
| 445 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 446 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY); |
| 447 | return(-1); |
| 448 | } |
| 449 | i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc, |
| 450 | &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]), |
| 451 | (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING); |
| 452 | |
| 453 | is_export=SSL_C_IS_EXPORT(s->session->cipher); |
| 454 | |
| 455 | if (!ssl_cipher_get_evp(s->session,&c,&md,NULL,NULL,NULL)) |
| 456 | { |
| 457 | ssl2_return_error(s,SSL2_PE_NO_CIPHER); |
| 458 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS); |
| 459 | return(0); |
| 460 | } |
| 461 | |
| 462 | if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) |
| 463 | { |
| 464 | is_export=1; |
| 465 | ek=8; |
| 466 | } |
| 467 | else |
| 468 | ek=5; |
| 469 | |
| 470 | /* bad decrypt */ |
| 471 | #if 1 |
| 472 | /* If a bad decrypt, continue with protocol but with a |
| 473 | * random master secret (Bleichenbacher attack) */ |
| 474 | if ((i < 0) || |
| 475 | ((!is_export && (i != EVP_CIPHER_key_length(c))) |
| 476 | || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i != |
| 477 | (unsigned int)EVP_CIPHER_key_length(c)))))) |
| 478 | { |
| 479 | ERR_clear_error(); |
| 480 | if (is_export) |
| 481 | i=ek; |
| 482 | else |
| 483 | i=EVP_CIPHER_key_length(c); |
| 484 | if (RAND_pseudo_bytes(p,i) <= 0) |
| 485 | return 0; |
| 486 | } |
| 487 | #else |
| 488 | if (i < 0) |
| 489 | { |
| 490 | error=1; |
| 491 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT); |
| 492 | } |
| 493 | /* incorrect number of key bytes for non export cipher */ |
| 494 | else if ((!is_export && (i != EVP_CIPHER_key_length(c))) |
| 495 | || (is_export && ((i != ek) || (s->s2->tmp.clear+i != |
| 496 | EVP_CIPHER_key_length(c))))) |
| 497 | { |
| 498 | error=1; |
| 499 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS); |
| 500 | } |
| 501 | if (error) |
| 502 | { |
| 503 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 504 | return(-1); |
| 505 | } |
| 506 | #endif |
| 507 | |
| 508 | if (is_export) i+=s->s2->tmp.clear; |
| 509 | |
| 510 | if (i > SSL_MAX_MASTER_KEY_LENGTH) |
| 511 | { |
| 512 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 513 | SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR); |
| 514 | return -1; |
| 515 | } |
| 516 | s->session->master_key_length=i; |
| 517 | memcpy(s->session->master_key,p,(unsigned int)i); |
| 518 | return(1); |
| 519 | } |
| 520 | |
| 521 | static int get_client_hello(SSL *s) |
| 522 | { |
| 523 | int i,n; |
| 524 | unsigned long len; |
| 525 | unsigned char *p; |
| 526 | STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */ |
| 527 | STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */ |
| 528 | STACK_OF(SSL_CIPHER) *prio, *allow; |
| 529 | int z; |
| 530 | |
| 531 | /* This is a bit of a hack to check for the correct packet |
| 532 | * type the first time round. */ |
| 533 | if (s->state == SSL2_ST_GET_CLIENT_HELLO_A) |
| 534 | { |
| 535 | s->first_packet=1; |
| 536 | s->state=SSL2_ST_GET_CLIENT_HELLO_B; |
| 537 | } |
| 538 | |
| 539 | p=(unsigned char *)s->init_buf->data; |
| 540 | if (s->state == SSL2_ST_GET_CLIENT_HELLO_B) |
| 541 | { |
| 542 | i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num); |
| 543 | if (i < (9-s->init_num)) |
| 544 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i)); |
| 545 | s->init_num = 9; |
| 546 | |
| 547 | if (*(p++) != SSL2_MT_CLIENT_HELLO) |
| 548 | { |
| 549 | if (p[-1] != SSL2_MT_ERROR) |
| 550 | { |
| 551 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 552 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE); |
| 553 | } |
| 554 | else |
| 555 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR); |
| 556 | return(-1); |
| 557 | } |
| 558 | n2s(p,i); |
| 559 | if (i < s->version) s->version=i; |
| 560 | n2s(p,i); s->s2->tmp.cipher_spec_length=i; |
| 561 | n2s(p,i); s->s2->tmp.session_id_length=i; |
| 562 | n2s(p,i); s->s2->challenge_length=i; |
| 563 | if ( (i < SSL2_MIN_CHALLENGE_LENGTH) || |
| 564 | (i > SSL2_MAX_CHALLENGE_LENGTH)) |
| 565 | { |
| 566 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 567 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH); |
| 568 | return(-1); |
| 569 | } |
| 570 | s->state=SSL2_ST_GET_CLIENT_HELLO_C; |
| 571 | } |
| 572 | |
| 573 | /* SSL2_ST_GET_CLIENT_HELLO_C */ |
| 574 | p=(unsigned char *)s->init_buf->data; |
| 575 | len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length; |
| 576 | if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) |
| 577 | { |
| 578 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 579 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG); |
| 580 | return -1; |
| 581 | } |
| 582 | n = (int)len - s->init_num; |
| 583 | i = ssl2_read(s,(char *)&(p[s->init_num]),n); |
| 584 | if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i)); |
| 585 | if (s->msg_callback) |
| 586 | s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */ |
| 587 | p += 9; |
| 588 | |
| 589 | /* get session-id before cipher stuff so we can get out session |
| 590 | * structure if it is cached */ |
| 591 | /* session-id */ |
| 592 | if ((s->s2->tmp.session_id_length != 0) && |
| 593 | (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH)) |
| 594 | { |
| 595 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 596 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH); |
| 597 | return(-1); |
| 598 | } |
| 599 | |
| 600 | if (s->s2->tmp.session_id_length == 0) |
| 601 | { |
| 602 | if (!ssl_get_new_session(s,1)) |
| 603 | { |
| 604 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 605 | return(-1); |
| 606 | } |
| 607 | } |
| 608 | else |
| 609 | { |
| 610 | i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]), |
| 611 | s->s2->tmp.session_id_length, NULL); |
| 612 | if (i == 1) |
| 613 | { /* previous session */ |
| 614 | s->hit=1; |
| 615 | } |
| 616 | else if (i == -1) |
| 617 | { |
| 618 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 619 | return(-1); |
| 620 | } |
| 621 | else |
| 622 | { |
| 623 | if (s->cert == NULL) |
| 624 | { |
| 625 | ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE); |
| 626 | SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET); |
| 627 | return(-1); |
| 628 | } |
| 629 | |
| 630 | if (!ssl_get_new_session(s,1)) |
| 631 | { |
| 632 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 633 | return(-1); |
| 634 | } |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | if (!s->hit) |
| 639 | { |
| 640 | cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length, |
| 641 | &s->session->ciphers); |
| 642 | if (cs == NULL) goto mem_err; |
| 643 | |
| 644 | cl=SSL_get_ciphers(s); |
| 645 | |
| 646 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) |
| 647 | { |
| 648 | prio=sk_SSL_CIPHER_dup(cl); |
| 649 | if (prio == NULL) goto mem_err; |
| 650 | allow = cs; |
| 651 | } |
| 652 | else |
| 653 | { |
| 654 | prio = cs; |
| 655 | allow = cl; |
| 656 | } |
| 657 | for (z=0; z<sk_SSL_CIPHER_num(prio); z++) |
| 658 | { |
| 659 | if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0) |
| 660 | { |
| 661 | (void)sk_SSL_CIPHER_delete(prio,z); |
| 662 | z--; |
| 663 | } |
| 664 | } |
| 665 | if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) |
| 666 | { |
| 667 | sk_SSL_CIPHER_free(s->session->ciphers); |
| 668 | s->session->ciphers = prio; |
| 669 | } |
| 670 | /* s->session->ciphers should now have a list of |
| 671 | * ciphers that are on both the client and server. |
| 672 | * This list is ordered by the order the client sent |
| 673 | * the ciphers or in the order of the server's preference |
| 674 | * if SSL_OP_CIPHER_SERVER_PREFERENCE was set. |
| 675 | */ |
| 676 | } |
| 677 | p+=s->s2->tmp.cipher_spec_length; |
| 678 | /* done cipher selection */ |
| 679 | |
| 680 | /* session id extracted already */ |
| 681 | p+=s->s2->tmp.session_id_length; |
| 682 | |
| 683 | /* challenge */ |
| 684 | if (s->s2->challenge_length > sizeof s->s2->challenge) |
| 685 | { |
| 686 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 687 | SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); |
| 688 | return -1; |
| 689 | } |
| 690 | memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length); |
| 691 | return(1); |
| 692 | mem_err: |
| 693 | SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE); |
| 694 | return(0); |
| 695 | } |
| 696 | |
| 697 | static int server_hello(SSL *s) |
| 698 | { |
| 699 | unsigned char *p,*d; |
| 700 | int n,hit; |
| 701 | |
| 702 | p=(unsigned char *)s->init_buf->data; |
| 703 | if (s->state == SSL2_ST_SEND_SERVER_HELLO_A) |
| 704 | { |
| 705 | d=p+11; |
| 706 | *(p++)=SSL2_MT_SERVER_HELLO; /* type */ |
| 707 | hit=s->hit; |
| 708 | *(p++)=(unsigned char)hit; |
| 709 | #if 1 |
| 710 | if (!hit) |
| 711 | { |
| 712 | if (s->session->sess_cert != NULL) |
| 713 | /* This can't really happen because get_client_hello |
| 714 | * has called ssl_get_new_session, which does not set |
| 715 | * sess_cert. */ |
| 716 | ssl_sess_cert_free(s->session->sess_cert); |
| 717 | s->session->sess_cert = ssl_sess_cert_new(); |
| 718 | if (s->session->sess_cert == NULL) |
| 719 | { |
| 720 | SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE); |
| 721 | return(-1); |
| 722 | } |
| 723 | } |
| 724 | /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL, |
| 725 | * depending on whether it survived in the internal cache |
| 726 | * or was retrieved from an external cache. |
| 727 | * If it is NULL, we cannot put any useful data in it anyway, |
| 728 | * so we don't touch it. |
| 729 | */ |
| 730 | |
| 731 | #else /* That's what used to be done when cert_st and sess_cert_st were |
| 732 | * the same. */ |
| 733 | if (!hit) |
| 734 | { /* else add cert to session */ |
| 735 | CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT); |
| 736 | if (s->session->sess_cert != NULL) |
| 737 | ssl_cert_free(s->session->sess_cert); |
| 738 | s->session->sess_cert=s->cert; |
| 739 | } |
| 740 | else /* We have a session id-cache hit, if the |
| 741 | * session-id has no certificate listed against |
| 742 | * the 'cert' structure, grab the 'old' one |
| 743 | * listed against the SSL connection */ |
| 744 | { |
| 745 | if (s->session->sess_cert == NULL) |
| 746 | { |
| 747 | CRYPTO_add(&s->cert->references,1, |
| 748 | CRYPTO_LOCK_SSL_CERT); |
| 749 | s->session->sess_cert=s->cert; |
| 750 | } |
| 751 | } |
| 752 | #endif |
| 753 | |
| 754 | if (s->cert == NULL) |
| 755 | { |
| 756 | ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE); |
| 757 | SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED); |
| 758 | return(-1); |
| 759 | } |
| 760 | |
| 761 | if (hit) |
| 762 | { |
| 763 | *(p++)=0; /* no certificate type */ |
| 764 | s2n(s->version,p); /* version */ |
| 765 | s2n(0,p); /* cert len */ |
| 766 | s2n(0,p); /* ciphers len */ |
| 767 | } |
| 768 | else |
| 769 | { |
| 770 | /* EAY EAY */ |
| 771 | /* put certificate type */ |
| 772 | *(p++)=SSL2_CT_X509_CERTIFICATE; |
| 773 | s2n(s->version,p); /* version */ |
| 774 | n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL); |
| 775 | s2n(n,p); /* certificate length */ |
| 776 | i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d); |
| 777 | n=0; |
| 778 | |
| 779 | /* lets send out the ciphers we like in the |
| 780 | * prefered order */ |
| 781 | n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d,0); |
| 782 | d+=n; |
| 783 | s2n(n,p); /* add cipher length */ |
| 784 | } |
| 785 | |
| 786 | /* make and send conn_id */ |
| 787 | s2n(SSL2_CONNECTION_ID_LENGTH,p); /* add conn_id length */ |
| 788 | s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH; |
| 789 | if (RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length) <= 0) |
| 790 | return -1; |
| 791 | memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH); |
| 792 | d+=SSL2_CONNECTION_ID_LENGTH; |
| 793 | |
| 794 | s->state=SSL2_ST_SEND_SERVER_HELLO_B; |
| 795 | s->init_num=d-(unsigned char *)s->init_buf->data; |
| 796 | s->init_off=0; |
| 797 | } |
| 798 | /* SSL2_ST_SEND_SERVER_HELLO_B */ |
| 799 | /* If we are using TCP/IP, the performance is bad if we do 2 |
| 800 | * writes without a read between them. This occurs when |
| 801 | * Session-id reuse is used, so I will put in a buffering module |
| 802 | */ |
| 803 | if (s->hit) |
| 804 | { |
| 805 | if (!ssl_init_wbio_buffer(s,1)) return(-1); |
| 806 | } |
| 807 | |
| 808 | return(ssl2_do_write(s)); |
| 809 | } |
| 810 | |
| 811 | static int get_client_finished(SSL *s) |
| 812 | { |
| 813 | unsigned char *p; |
| 814 | int i, n; |
| 815 | unsigned long len; |
| 816 | |
| 817 | p=(unsigned char *)s->init_buf->data; |
| 818 | if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A) |
| 819 | { |
| 820 | i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num); |
| 821 | if (i < 1-s->init_num) |
| 822 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i)); |
| 823 | s->init_num += i; |
| 824 | |
| 825 | if (*p != SSL2_MT_CLIENT_FINISHED) |
| 826 | { |
| 827 | if (*p != SSL2_MT_ERROR) |
| 828 | { |
| 829 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 830 | SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE); |
| 831 | } |
| 832 | else |
| 833 | { |
| 834 | SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR); |
| 835 | /* try to read the error message */ |
| 836 | i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num); |
| 837 | return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i); |
| 838 | } |
| 839 | return(-1); |
| 840 | } |
| 841 | s->state=SSL2_ST_GET_CLIENT_FINISHED_B; |
| 842 | } |
| 843 | |
| 844 | /* SSL2_ST_GET_CLIENT_FINISHED_B */ |
| 845 | if (s->s2->conn_id_length > sizeof s->s2->conn_id) |
| 846 | { |
| 847 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 848 | SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR); |
| 849 | return -1; |
| 850 | } |
| 851 | len = 1 + (unsigned long)s->s2->conn_id_length; |
| 852 | n = (int)len - s->init_num; |
| 853 | i = ssl2_read(s,(char *)&(p[s->init_num]),n); |
| 854 | if (i < n) |
| 855 | { |
| 856 | return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i)); |
| 857 | } |
| 858 | if (s->msg_callback) |
| 859 | s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */ |
| 860 | p += 1; |
| 861 | if (memcmp(p,s->s2->conn_id,s->s2->conn_id_length) != 0) |
| 862 | { |
| 863 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 864 | SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT); |
| 865 | return(-1); |
| 866 | } |
| 867 | return(1); |
| 868 | } |
| 869 | |
| 870 | static int server_verify(SSL *s) |
| 871 | { |
| 872 | unsigned char *p; |
| 873 | |
| 874 | if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A) |
| 875 | { |
| 876 | p=(unsigned char *)s->init_buf->data; |
| 877 | *(p++)=SSL2_MT_SERVER_VERIFY; |
| 878 | if (s->s2->challenge_length > sizeof s->s2->challenge) |
| 879 | { |
| 880 | SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR); |
| 881 | return -1; |
| 882 | } |
| 883 | memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length); |
| 884 | /* p+=s->s2->challenge_length; */ |
| 885 | |
| 886 | s->state=SSL2_ST_SEND_SERVER_VERIFY_B; |
| 887 | s->init_num=s->s2->challenge_length+1; |
| 888 | s->init_off=0; |
| 889 | } |
| 890 | return(ssl2_do_write(s)); |
| 891 | } |
| 892 | |
| 893 | static int server_finish(SSL *s) |
| 894 | { |
| 895 | unsigned char *p; |
| 896 | |
| 897 | if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A) |
| 898 | { |
| 899 | p=(unsigned char *)s->init_buf->data; |
| 900 | *(p++)=SSL2_MT_SERVER_FINISHED; |
| 901 | |
| 902 | if (s->session->session_id_length > sizeof s->session->session_id) |
| 903 | { |
| 904 | SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR); |
| 905 | return -1; |
| 906 | } |
| 907 | memcpy(p,s->session->session_id, (unsigned int)s->session->session_id_length); |
| 908 | /* p+=s->session->session_id_length; */ |
| 909 | |
| 910 | s->state=SSL2_ST_SEND_SERVER_FINISHED_B; |
| 911 | s->init_num=s->session->session_id_length+1; |
| 912 | s->init_off=0; |
| 913 | } |
| 914 | |
| 915 | /* SSL2_ST_SEND_SERVER_FINISHED_B */ |
| 916 | return(ssl2_do_write(s)); |
| 917 | } |
| 918 | |
| 919 | /* send the request and check the response */ |
| 920 | static int request_certificate(SSL *s) |
| 921 | { |
| 922 | const unsigned char *cp; |
| 923 | unsigned char *p,*p2,*buf2; |
| 924 | unsigned char *ccd; |
| 925 | int i,j,ctype,ret= -1; |
| 926 | unsigned long len; |
| 927 | X509 *x509=NULL; |
| 928 | STACK_OF(X509) *sk=NULL; |
| 929 | |
| 930 | ccd=s->s2->tmp.ccl; |
| 931 | if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A) |
| 932 | { |
| 933 | p=(unsigned char *)s->init_buf->data; |
| 934 | *(p++)=SSL2_MT_REQUEST_CERTIFICATE; |
| 935 | *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION; |
| 936 | if (RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH) <= 0) |
| 937 | return -1; |
| 938 | memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH); |
| 939 | |
| 940 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B; |
| 941 | s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2; |
| 942 | s->init_off=0; |
| 943 | } |
| 944 | |
| 945 | if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B) |
| 946 | { |
| 947 | i=ssl2_do_write(s); |
| 948 | if (i <= 0) |
| 949 | { |
| 950 | ret=i; |
| 951 | goto end; |
| 952 | } |
| 953 | |
| 954 | s->init_num=0; |
| 955 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C; |
| 956 | } |
| 957 | |
| 958 | if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C) |
| 959 | { |
| 960 | p=(unsigned char *)s->init_buf->data; |
| 961 | i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */ |
| 962 | if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3 |
| 963 | * (probably NO-CERTIFICATE-ERROR) */ |
| 964 | { |
| 965 | ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i); |
| 966 | goto end; |
| 967 | } |
| 968 | s->init_num += i; |
| 969 | |
| 970 | if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR)) |
| 971 | { |
| 972 | n2s(p,i); |
| 973 | if (i != SSL2_PE_NO_CERTIFICATE) |
| 974 | { |
| 975 | /* not the error message we expected -- let ssl2_part_read handle it */ |
| 976 | s->init_num -= 3; |
| 977 | ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3); |
| 978 | goto end; |
| 979 | } |
| 980 | |
| 981 | if (s->msg_callback) |
| 982 | s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */ |
| 983 | |
| 984 | /* this is the one place where we can recover from an SSL 2.0 error */ |
| 985 | |
| 986 | if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT) |
| 987 | { |
| 988 | ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); |
| 989 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); |
| 990 | goto end; |
| 991 | } |
| 992 | ret=1; |
| 993 | goto end; |
| 994 | } |
| 995 | if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6)) |
| 996 | { |
| 997 | ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR); |
| 998 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ); |
| 999 | goto end; |
| 1000 | } |
| 1001 | if (s->init_num != 6) |
| 1002 | { |
| 1003 | SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
| 1004 | goto end; |
| 1005 | } |
| 1006 | |
| 1007 | /* ok we have a response */ |
| 1008 | /* certificate type, there is only one right now. */ |
| 1009 | ctype= *(p++); |
| 1010 | if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) |
| 1011 | { |
| 1012 | ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE); |
| 1013 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT); |
| 1014 | goto end; |
| 1015 | } |
| 1016 | n2s(p,i); s->s2->tmp.clen=i; |
| 1017 | n2s(p,i); s->s2->tmp.rlen=i; |
| 1018 | s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D; |
| 1019 | } |
| 1020 | |
| 1021 | /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */ |
| 1022 | p=(unsigned char *)s->init_buf->data; |
| 1023 | len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen; |
| 1024 | if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) |
| 1025 | { |
| 1026 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_MESSAGE_TOO_LONG); |
| 1027 | goto end; |
| 1028 | } |
| 1029 | j = (int)len - s->init_num; |
| 1030 | i = ssl2_read(s,(char *)&(p[s->init_num]),j); |
| 1031 | if (i < j) |
| 1032 | { |
| 1033 | ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i); |
| 1034 | goto end; |
| 1035 | } |
| 1036 | if (s->msg_callback) |
| 1037 | s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */ |
| 1038 | p += 6; |
| 1039 | |
| 1040 | cp = p; |
| 1041 | x509=(X509 *)d2i_X509(NULL,&cp,(long)s->s2->tmp.clen); |
| 1042 | if (x509 == NULL) |
| 1043 | { |
| 1044 | SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB); |
| 1045 | goto msg_end; |
| 1046 | } |
| 1047 | |
| 1048 | if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509))) |
| 1049 | { |
| 1050 | SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE); |
| 1051 | goto msg_end; |
| 1052 | } |
| 1053 | |
| 1054 | i=ssl_verify_cert_chain(s,sk); |
| 1055 | |
| 1056 | if (i > 0) /* we like the packet, now check the chksum */ |
| 1057 | { |
| 1058 | EVP_MD_CTX ctx; |
| 1059 | EVP_PKEY *pkey=NULL; |
| 1060 | |
| 1061 | EVP_MD_CTX_init(&ctx); |
| 1062 | EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL); |
| 1063 | EVP_VerifyUpdate(&ctx,s->s2->key_material, |
| 1064 | s->s2->key_material_length); |
| 1065 | EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH); |
| 1066 | |
| 1067 | i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL); |
| 1068 | buf2=OPENSSL_malloc((unsigned int)i); |
| 1069 | if (buf2 == NULL) |
| 1070 | { |
| 1071 | SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE); |
| 1072 | goto msg_end; |
| 1073 | } |
| 1074 | p2=buf2; |
| 1075 | i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2); |
| 1076 | EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i); |
| 1077 | OPENSSL_free(buf2); |
| 1078 | |
| 1079 | pkey=X509_get_pubkey(x509); |
| 1080 | if (pkey == NULL) goto end; |
| 1081 | i=EVP_VerifyFinal(&ctx,cp,s->s2->tmp.rlen,pkey); |
| 1082 | EVP_PKEY_free(pkey); |
| 1083 | EVP_MD_CTX_cleanup(&ctx); |
| 1084 | |
| 1085 | if (i > 0) |
| 1086 | { |
| 1087 | if (s->session->peer != NULL) |
| 1088 | X509_free(s->session->peer); |
| 1089 | s->session->peer=x509; |
| 1090 | CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509); |
| 1091 | s->session->verify_result = s->verify_result; |
| 1092 | ret=1; |
| 1093 | goto end; |
| 1094 | } |
| 1095 | else |
| 1096 | { |
| 1097 | SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM); |
| 1098 | goto msg_end; |
| 1099 | } |
| 1100 | } |
| 1101 | else |
| 1102 | { |
| 1103 | msg_end: |
| 1104 | ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE); |
| 1105 | } |
| 1106 | end: |
| 1107 | sk_X509_free(sk); |
| 1108 | X509_free(x509); |
| 1109 | return(ret); |
| 1110 | } |
| 1111 | |
| 1112 | static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from, |
| 1113 | unsigned char *to, int padding) |
| 1114 | { |
| 1115 | RSA *rsa; |
| 1116 | int i; |
| 1117 | |
| 1118 | if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)) |
| 1119 | { |
| 1120 | SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY); |
| 1121 | return(-1); |
| 1122 | } |
| 1123 | if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA) |
| 1124 | { |
| 1125 | SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA); |
| 1126 | return(-1); |
| 1127 | } |
| 1128 | rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa; |
| 1129 | |
| 1130 | /* we have the public key */ |
| 1131 | i=RSA_private_decrypt(len,from,to,rsa,padding); |
| 1132 | if (i < 0) |
| 1133 | SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB); |
| 1134 | return(i); |
| 1135 | } |
| 1136 | #else /* !OPENSSL_NO_SSL2 */ |
| 1137 | |
| 1138 | # if PEDANTIC |
| 1139 | static void *dummy=&dummy; |
| 1140 | # endif |
| 1141 | |
| 1142 | #endif |