ssl/s2_clnt.c

   1 /* ssl/s2_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) 1998-2001 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/rand.h>
 116 #include <openssl/buffer.h>
 117 #include <openssl/objects.h>
 118 #include <openssl/evp.h>
 119
 120 static SSL_METHOD *ssl2_get_client_method(int ver);
 121 static int get_server_finished(SSL *s);
 122 static int get_server_verify(SSL *s);
 123 static int get_server_hello(SSL *s);
 124 static int client_hello(SSL *s);
 125 static int client_master_key(SSL *s);
 126 static int client_finished(SSL *s);
 127 static int client_certificate(SSL *s);
 128 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
 129         unsigned char *to,int padding);
 130 #define BREAK   break
 131
 132 static SSL_METHOD *ssl2_get_client_method(int ver)
 133         {
 134         if (ver == SSL2_VERSION)
 135                 return(SSLv2_client_method());
 136         else
 137                 return(NULL);
 138         }
 139
 140 SSL_METHOD *SSLv2_client_method(void)
 141         {
 142         static int init=1;
 143         static SSL_METHOD SSLv2_client_data;
 144
 145         if (init)
 146                 {
 147                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
 148
 149                 if (init)
 150                         {
 151                         memcpy((char *)&SSLv2_client_data,(char *)sslv2_base_method(),
 152                                 sizeof(SSL_METHOD));
 153                         SSLv2_client_data.ssl_connect=ssl2_connect;
 154                         SSLv2_client_data.get_ssl_method=ssl2_get_client_method;
 155                         init=0;
 156                         }
 157
 158                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
 159                 }
 160         return(&SSLv2_client_data);
 161         }
 162
 163 int ssl2_connect(SSL *s)
 164         {
 165         unsigned long l=time(NULL);
 166         BUF_MEM *buf=NULL;
 167         int ret= -1;
 168         void (*cb)(const SSL *ssl,int type,int val)=NULL;
 169         int new_state,state;
 170
 171         RAND_add(&l,sizeof(l),0);
 172         ERR_clear_error();
 173         clear_sys_error();
 174
 175         if (s->info_callback != NULL)
 176                 cb=s->info_callback;
 177         else if (s->ctx->info_callback != NULL)
 178                 cb=s->ctx->info_callback;
 179
 180         /* init things to blank */
 181         s->in_handshake++;
 182         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 183
 184         for (;;)
 185                 {
 186                 state=s->state;
 187
 188                 switch (s->state)
 189                         {
 190                 case SSL_ST_BEFORE:
 191                 case SSL_ST_CONNECT:
 192                 case SSL_ST_BEFORE|SSL_ST_CONNECT:
 193                 case SSL_ST_OK|SSL_ST_CONNECT:
 194
 195                         s->server=0;
 196                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 197
 198                         s->version=SSL2_VERSION;
 199                         s->type=SSL_ST_CONNECT;
 200
 201                         buf=s->init_buf;
 202                         if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
 203                                 {
 204                                 ret= -1;
 205                                 goto end;
 206                                 }
 207                         if (!BUF_MEM_grow(buf,
 208                                 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
 209                                 {
 210                                 if (buf == s->init_buf)
 211                                         buf=NULL;
 212                                 ret= -1;
 213                                 goto end;
 214                                 }
 215                         s->init_buf=buf;
 216                         buf=NULL;
 217                         s->init_num=0;
 218                         s->state=SSL2_ST_SEND_CLIENT_HELLO_A;
 219                         s->ctx->stats.sess_connect++;
 220                         s->handshake_func=ssl2_connect;
 221                         BREAK;
 222
 223                 case SSL2_ST_SEND_CLIENT_HELLO_A:
 224                 case SSL2_ST_SEND_CLIENT_HELLO_B:
 225                         s->shutdown=0;
 226                         ret=client_hello(s);
 227                         if (ret <= 0) goto end;
 228                         s->init_num=0;
 229                         s->state=SSL2_ST_GET_SERVER_HELLO_A;
 230                         BREAK;
 231
 232                 case SSL2_ST_GET_SERVER_HELLO_A:
 233                 case SSL2_ST_GET_SERVER_HELLO_B:
 234                         ret=get_server_hello(s);
 235                         if (ret <= 0) goto end;
 236                         s->init_num=0;
 237                         if (!s->hit) /* new session */
 238                                 {
 239                                 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A;
 240                                 BREAK;
 241                                 }
 242                         else
 243                                 {
 244                                 s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
 245                                 break;
 246                                 }
 247
 248                 case SSL2_ST_SEND_CLIENT_MASTER_KEY_A:
 249                 case SSL2_ST_SEND_CLIENT_MASTER_KEY_B:
 250                         ret=client_master_key(s);
 251                         if (ret <= 0) goto end;
 252                         s->init_num=0;
 253                         s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
 254                         break;
 255
 256                 case SSL2_ST_CLIENT_START_ENCRYPTION:
 257                         /* Ok, we now have all the stuff needed to
 258                          * start encrypting, so lets fire it up :-) */
 259                         if (!ssl2_enc_init(s,1))
 260                                 {
 261                                 ret= -1;
 262                                 goto end;
 263                                 }
 264                         s->s2->clear_text=0;
 265                         s->state=SSL2_ST_SEND_CLIENT_FINISHED_A;
 266                         break;
 267
 268                 case SSL2_ST_SEND_CLIENT_FINISHED_A:
 269                 case SSL2_ST_SEND_CLIENT_FINISHED_B:
 270                         ret=client_finished(s);
 271                         if (ret <= 0) goto end;
 272                         s->init_num=0;
 273                         s->state=SSL2_ST_GET_SERVER_VERIFY_A;
 274                         break;
 275
 276                 case SSL2_ST_GET_SERVER_VERIFY_A:
 277                 case SSL2_ST_GET_SERVER_VERIFY_B:
 278                         ret=get_server_verify(s);
 279                         if (ret <= 0) goto end;
 280                         s->init_num=0;
 281                         s->state=SSL2_ST_GET_SERVER_FINISHED_A;
 282                         break;
 283
 284                 case SSL2_ST_GET_SERVER_FINISHED_A:
 285                 case SSL2_ST_GET_SERVER_FINISHED_B:
 286                         ret=get_server_finished(s);
 287                         if (ret <= 0) goto end;
 288                         break;
 289
 290                 case SSL2_ST_SEND_CLIENT_CERTIFICATE_A:
 291                 case SSL2_ST_SEND_CLIENT_CERTIFICATE_B:
 292                 case SSL2_ST_SEND_CLIENT_CERTIFICATE_C:
 293                 case SSL2_ST_SEND_CLIENT_CERTIFICATE_D:
 294                 case SSL2_ST_X509_GET_CLIENT_CERTIFICATE:
 295                         ret=client_certificate(s);
 296                         if (ret <= 0) goto end;
 297                         s->init_num=0;
 298                         s->state=SSL2_ST_GET_SERVER_FINISHED_A;
 299                         break;
 300
 301                 case SSL_ST_OK:
 302                         if (s->init_buf != NULL)
 303                                 {
 304                                 BUF_MEM_free(s->init_buf);
 305                                 s->init_buf=NULL;
 306                                 }
 307                         s->init_num=0;
 308                 /*      ERR_clear_error();*/
 309
 310                         /* If we want to cache session-ids in the client
 311                          * and we successfully add the session-id to the
 312                          * cache, and there is a callback, then pass it out.
 313                          * 26/11/96 - eay - only add if not a re-used session.
 314                          */
 315
 316                         ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
 317                         if (s->hit) s->ctx->stats.sess_hit++;
 318
 319                         ret=1;
 320                         /* s->server=0; */
 321                         s->ctx->stats.sess_connect_good++;
 322
 323                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
 324
 325                         goto end;
 326                         /* break; */
 327                 default:
 328                         SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE);
 329                         return(-1);
 330                         /* break; */
 331                         }
 332
 333                 if ((cb != NULL) && (s->state != state))
 334                         {
 335                         new_state=s->state;
 336                         s->state=state;
 337                         cb(s,SSL_CB_CONNECT_LOOP,1);
 338                         s->state=new_state;
 339                         }
 340                 }
 341 end:
 342         s->in_handshake--;
 343         if (buf != NULL)
 344                 BUF_MEM_free(buf);
 345         if (cb != NULL)
 346                 cb(s,SSL_CB_CONNECT_EXIT,ret);
 347         return(ret);
 348         }
 349
 350 static int get_server_hello(SSL *s)
 351         {
 352         unsigned char *buf;
 353         unsigned char *p;
 354         int i,j;
 355         unsigned long len;
 356         STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow;
 357
 358         buf=(unsigned char *)s->init_buf->data;
 359         p=buf;
 360         if (s->state == SSL2_ST_GET_SERVER_HELLO_A)
 361                 {
 362                 i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num);
 363                 if (i < (11-s->init_num))
 364                         return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
 365                 s->init_num = 11;
 366
 367                 if (*(p++) != SSL2_MT_SERVER_HELLO)
 368                         {
 369                         if (p[-1] != SSL2_MT_ERROR)
 370                                 {
 371                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 372                                 SSLerr(SSL_F_GET_SERVER_HELLO,
 373                                         SSL_R_READ_WRONG_PACKET_TYPE);
 374                                 }
 375                         else
 376                                 SSLerr(SSL_F_GET_SERVER_HELLO,
 377                                         SSL_R_PEER_ERROR);
 378                         return(-1);
 379                         }
 380 #ifdef __APPLE_CC__
 381                 /* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug
 382                  * workaround. <appro@fy.chalmers.se> */
 383                 s->hit=(i=*(p++))?1:0;
 384 #else
 385                 s->hit=(*(p++))?1:0;
 386 #endif
 387                 s->s2->tmp.cert_type= *(p++);
 388                 n2s(p,i);
 389                 if (i < s->version) s->version=i;
 390                 n2s(p,i); s->s2->tmp.cert_length=i;
 391                 n2s(p,i); s->s2->tmp.csl=i;
 392                 n2s(p,i); s->s2->tmp.conn_id_length=i;
 393                 s->state=SSL2_ST_GET_SERVER_HELLO_B;
 394                 }
 395
 396         /* SSL2_ST_GET_SERVER_HELLO_B */
 397         len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length;
 398         if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
 399                 {
 400                 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG);
 401                 return -1;
 402                 }
 403         j = (int)len - s->init_num;
 404         i = ssl2_read(s,(char *)&(buf[s->init_num]),j);
 405         if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
 406         if (s->msg_callback)
 407                 s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */
 408
 409         /* things are looking good */
 410
 411         p = buf + 11;
 412         if (s->hit)
 413                 {
 414                 if (s->s2->tmp.cert_length != 0)
 415                         {
 416                         SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO);
 417                         return(-1);
 418                         }
 419                 if (s->s2->tmp.cert_type != 0)
 420                         {
 421                         if (!(s->options &
 422                                 SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG))
 423                                 {
 424                                 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO);
 425                                 return(-1);
 426                                 }
 427                         }
 428                 if (s->s2->tmp.csl != 0)
 429                         {
 430                         SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);
 431                         return(-1);
 432                         }
 433                 }
 434         else
 435                 {
 436 #ifdef undef
 437                 /* very bad */
 438                 memset(s->session->session_id,0,
 439                         SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES);
 440                 s->session->session_id_length=0;
 441                 */
 442 #endif
 443
 444                 /* we need to do this in case we were trying to reuse a
 445                  * client session but others are already reusing it.
 446                  * If this was a new 'blank' session ID, the session-id
 447                  * length will still be 0 */
 448                 if (s->session->session_id_length > 0)
 449                         {
 450                         if (!ssl_get_new_session(s,0))
 451                                 {
 452                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 453                                 return(-1);
 454                                 }
 455                         }
 456
 457                 if (ssl2_set_certificate(s,s->s2->tmp.cert_type,
 458                         s->s2->tmp.cert_length,p) <= 0)
 459                         {
 460                         ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
 461                         return(-1);
 462                         }
 463                 p+=s->s2->tmp.cert_length;
 464
 465                 if (s->s2->tmp.csl == 0)
 466                         {
 467                         ssl2_return_error(s,SSL2_PE_NO_CIPHER);
 468                         SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST);
 469                         return(-1);
 470                         }
 471
 472                 /* We have just received a list of ciphers back from the
 473                  * server.  We need to get the ones that match, then select
 474                  * the one we want the most :-). */
 475
 476                 /* load the ciphers */
 477                 sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl,
 478                                             &s->session->ciphers);
 479                 p+=s->s2->tmp.csl;
 480                 if (sk == NULL)
 481                         {
 482                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 483                         SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);
 484                         return(-1);
 485                         }
 486
 487                 sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp);
 488
 489                 /* get the array of ciphers we will accept */
 490                 cl=SSL_get_ciphers(s);
 491                 sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp);
 492
 493                 /*
 494                  * If server preference flag set, choose the first
 495                  * (highest priority) cipher the server sends, otherwise
 496                  * client preference has priority.
 497                  */
 498                 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
 499                     {
 500                     prio = sk;
 501                     allow = cl;
 502                     }
 503                 else
 504                     {
 505                     prio = cl;
 506                     allow = sk;
 507                     }
 508                 /* In theory we could have ciphers sent back that we
 509                  * don't want to use but that does not matter since we
 510                  * will check against the list we originally sent and
 511                  * for performance reasons we should not bother to match
 512                  * the two lists up just to check. */
 513                 for (i=0; i<sk_SSL_CIPHER_num(prio); i++)
 514                         {
 515                         if (sk_SSL_CIPHER_find(allow,
 516                                              sk_SSL_CIPHER_value(prio,i)) >= 0)
 517                                 break;
 518                         }
 519
 520                 if (i >= sk_SSL_CIPHER_num(prio))
 521                         {
 522                         ssl2_return_error(s,SSL2_PE_NO_CIPHER);
 523                         SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH);
 524                         return(-1);
 525                         }
 526                 s->session->cipher=sk_SSL_CIPHER_value(prio,i);
 527
 528
 529                 if (s->session->peer != NULL) /* can't happen*/
 530                         {
 531                         ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
 532                         SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
 533                         return(-1);
 534                         }
 535
 536                 s->session->peer = s->session->sess_cert->peer_key->x509;
 537                 /* peer_key->x509 has been set by ssl2_set_certificate. */
 538                 CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509);
 539                 }
 540
 541         if (s->session->peer != s->session->sess_cert->peer_key->x509)
 542                 /* can't happen */
 543                 {
 544                 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
 545                 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
 546                 return(-1);
 547                 }
 548
 549         s->s2->conn_id_length=s->s2->tmp.conn_id_length;
 550         if (s->s2->conn_id_length > sizeof s->s2->conn_id)
 551                 {
 552                 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
 553                 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG);
 554                 return -1;
 555                 }
 556         memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length);
 557         return(1);
 558         }
 559
 560 static int client_hello(SSL *s)
 561         {
 562         unsigned char *buf;
 563         unsigned char *p,*d;
 564 /*      CIPHER **cipher;*/
 565         int i,n,j;
 566
 567         buf=(unsigned char *)s->init_buf->data;
 568         if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A)
 569                 {
 570                 if ((s->session == NULL) ||
 571                         (s->session->ssl_version != s->version))
 572                         {
 573                         if (!ssl_get_new_session(s,0))
 574                                 {
 575                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 576                                 return(-1);
 577                                 }
 578                         }
 579                 /* else use the pre-loaded session */
 580
 581                 p=buf;                                  /* header */
 582                 d=p+9;                                  /* data section */
 583                 *(p++)=SSL2_MT_CLIENT_HELLO;            /* type */
 584                 s2n(SSL2_VERSION,p);                    /* version */
 585                 n=j=0;
 586
 587                 n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d,0);
 588                 d+=n;
 589
 590                 if (n == 0)
 591                         {
 592                         SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
 593                         return(-1);
 594                         }
 595
 596                 s2n(n,p);                       /* cipher spec num bytes */
 597
 598                 if ((s->session->session_id_length > 0) &&
 599                         (s->session->session_id_length <=
 600                         SSL2_MAX_SSL_SESSION_ID_LENGTH))
 601                         {
 602                         i=s->session->session_id_length;
 603                         s2n(i,p);               /* session id length */
 604                         memcpy(d,s->session->session_id,(unsigned int)i);
 605                         d+=i;
 606                         }
 607                 else
 608                         {
 609                         s2n(0,p);
 610                         }
 611
 612                 s->s2->challenge_length=SSL2_CHALLENGE_LENGTH;
 613                 s2n(SSL2_CHALLENGE_LENGTH,p);           /* challenge length */
 614                 /*challenge id data*/
 615                 if (RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH) <= 0)
 616                         return -1;
 617                 memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH);
 618                 d+=SSL2_CHALLENGE_LENGTH;
 619
 620                 s->state=SSL2_ST_SEND_CLIENT_HELLO_B;
 621                 s->init_num=d-buf;
 622                 s->init_off=0;
 623                 }
 624         /* SSL2_ST_SEND_CLIENT_HELLO_B */
 625         return(ssl2_do_write(s));
 626         }
 627
 628 static int client_master_key(SSL *s)
 629         {
 630         unsigned char *buf;
 631         unsigned char *p,*d;
 632         int clear,enc,karg,i;
 633         SSL_SESSION *sess;
 634         const EVP_CIPHER *c;
 635         const EVP_MD *md;
 636
 637         buf=(unsigned char *)s->init_buf->data;
 638         if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A)
 639                 {
 640
 641                 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
 642                         {
 643                         ssl2_return_error(s,SSL2_PE_NO_CIPHER);
 644                         SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
 645                         return(-1);
 646                         }
 647                 sess=s->session;
 648                 p=buf;
 649                 d=p+10;
 650                 *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */
 651
 652                 i=ssl_put_cipher_by_char(s,sess->cipher,p);
 653                 p+=i;
 654
 655                 /* make key_arg data */
 656                 i=EVP_CIPHER_iv_length(c);
 657                 sess->key_arg_length=i;
 658                 if (i > SSL_MAX_KEY_ARG_LENGTH)
 659                         {
 660                         ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
 661                         SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
 662                         return -1;
 663                         }
 664                 if (i > 0)
 665                         if (RAND_pseudo_bytes(sess->key_arg,i) <= 0)
 666                                 return -1;
 667
 668                 /* make a master key */
 669                 i=EVP_CIPHER_key_length(c);
 670                 sess->master_key_length=i;
 671                 if (i > 0)
 672                         {
 673                         if (i > (int)sizeof(sess->master_key))
 674                                 {
 675                                 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
 676                                 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
 677                                 return -1;
 678                                 }
 679                         if (RAND_bytes(sess->master_key,i) <= 0)
 680                                 {
 681                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 682                                 return(-1);
 683                                 }
 684                         }
 685
 686                 if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
 687                         enc=8;
 688                 else if (SSL_C_IS_EXPORT(sess->cipher))
 689                         enc=5;
 690                 else
 691                         enc=i;
 692
 693                 if ((int)i < enc)
 694                         {
 695                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 696                         SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR);
 697                         return(-1);
 698                         }
 699                 clear=i-enc;
 700                 s2n(clear,p);
 701                 memcpy(d,sess->master_key,(unsigned int)clear);
 702                 d+=clear;
 703
 704                 enc=ssl_rsa_public_encrypt(sess->sess_cert,enc,
 705                         &(sess->master_key[clear]),d,
 706                         (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
 707                 if (enc <= 0)
 708                         {
 709                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 710                         SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR);
 711                         return(-1);
 712                         }
 713 #ifdef PKCS1_CHECK
 714                 if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++;
 715                 if (s->options & SSL_OP_PKCS1_CHECK_2)
 716                         sess->master_key[clear]++;
 717 #endif
 718                 s2n(enc,p);
 719                 d+=enc;
 720                 karg=sess->key_arg_length;
 721                 s2n(karg,p); /* key arg size */
 722                 if (karg > (int)sizeof(sess->key_arg))
 723                         {
 724                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 725                         SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
 726                         return -1;
 727                         }
 728                 memcpy(d,sess->key_arg,(unsigned int)karg);
 729                 d+=karg;
 730
 731                 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B;
 732                 s->init_num=d-buf;
 733                 s->init_off=0;
 734                 }
 735
 736         /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */
 737         return(ssl2_do_write(s));
 738         }
 739
 740 static int client_finished(SSL *s)
 741         {
 742         unsigned char *p;
 743
 744         if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A)
 745                 {
 746                 p=(unsigned char *)s->init_buf->data;
 747                 *(p++)=SSL2_MT_CLIENT_FINISHED;
 748                 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
 749                         {
 750                         SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
 751                         return -1;
 752                         }
 753                 memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length);
 754
 755                 s->state=SSL2_ST_SEND_CLIENT_FINISHED_B;
 756                 s->init_num=s->s2->conn_id_length+1;
 757                 s->init_off=0;
 758                 }
 759         return(ssl2_do_write(s));
 760         }
 761
 762 /* read the data and then respond */
 763 static int client_certificate(SSL *s)
 764         {
 765         unsigned char *buf;
 766         unsigned char *p,*d;
 767         int i;
 768         unsigned int n;
 769         int cert_ch_len;
 770         unsigned char *cert_ch;
 771
 772         buf=(unsigned char *)s->init_buf->data;
 773
 774         /* We have a cert associated with the SSL, so attach it to
 775          * the session if it does not have one */
 776
 777         if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A)
 778                 {
 779                 i=ssl2_read(s,(char *)&(buf[s->init_num]),
 780                         SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num);
 781                 if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num))
 782                         return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i));
 783                 s->init_num += i;
 784                 if (s->msg_callback)
 785                         s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */
 786
 787                 /* type=buf[0]; */
 788                 /* type eq x509 */
 789                 if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
 790                         {
 791                         ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
 792                         SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE);
 793                         return(-1);
 794                         }
 795
 796                 if ((s->cert == NULL) ||
 797                         (s->cert->key->x509 == NULL) ||
 798                         (s->cert->key->privatekey == NULL))
 799                         {
 800                         s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE;
 801                         }
 802                 else
 803                         s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
 804                 }
 805
 806         cert_ch = buf + 2;
 807         cert_ch_len = s->init_num - 2;
 808
 809         if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE)
 810                 {
 811                 X509 *x509=NULL;
 812                 EVP_PKEY *pkey=NULL;
 813
 814                 /* If we get an error we need to
 815                  * ssl->rwstate=SSL_X509_LOOKUP;
 816                  * return(error);
 817                  * We should then be retried when things are ok and we
 818                  * can get a cert or not */
 819
 820                 i=0;
 821                 if (s->ctx->client_cert_cb != NULL)
 822                         {
 823                         i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
 824                         }
 825
 826                 if (i < 0)
 827                         {
 828                         s->rwstate=SSL_X509_LOOKUP;
 829                         return(-1);
 830                         }
 831                 s->rwstate=SSL_NOTHING;
 832
 833                 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
 834                         {
 835                         s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
 836                         if (    !SSL_use_certificate(s,x509) ||
 837                                 !SSL_use_PrivateKey(s,pkey))
 838                                 {
 839                                 i=0;
 840                                 }
 841                         X509_free(x509);
 842                         EVP_PKEY_free(pkey);
 843                         }
 844                 else if (i == 1)
 845                         {
 846                         if (x509 != NULL) X509_free(x509);
 847                         if (pkey != NULL) EVP_PKEY_free(pkey);
 848                         SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
 849                         i=0;
 850                         }
 851
 852                 if (i == 0)
 853                         {
 854                         /* We have no client certificate to respond with
 855                          * so send the correct error message back */
 856                         s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B;
 857                         p=buf;
 858                         *(p++)=SSL2_MT_ERROR;
 859                         s2n(SSL2_PE_NO_CERTIFICATE,p);
 860                         s->init_off=0;
 861                         s->init_num=3;
 862                         /* Write is done at the end */
 863                         }
 864                 }
 865
 866         if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B)
 867                 {
 868                 return(ssl2_do_write(s));
 869                 }
 870
 871         if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C)
 872                 {
 873                 EVP_MD_CTX ctx;
 874
 875                 /* ok, now we calculate the checksum
 876                  * do it first so we can reuse buf :-) */
 877                 p=buf;
 878                 EVP_MD_CTX_init(&ctx);
 879                 EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL);
 880                 EVP_SignUpdate(&ctx,s->s2->key_material,
 881                                s->s2->key_material_length);
 882                 EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len);
 883                 n=i2d_X509(s->session->sess_cert->peer_key->x509,&p);
 884                 EVP_SignUpdate(&ctx,buf,(unsigned int)n);
 885
 886                 p=buf;
 887                 d=p+6;
 888                 *(p++)=SSL2_MT_CLIENT_CERTIFICATE;
 889                 *(p++)=SSL2_CT_X509_CERTIFICATE;
 890                 n=i2d_X509(s->cert->key->x509,&d);
 891                 s2n(n,p);
 892
 893                 if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey))
 894                         {
 895                         /* this is not good.  If things have failed it
 896                          * means there so something wrong with the key.
 897                          * We will continue with a 0 length signature
 898                          */
 899                         }
 900                 EVP_MD_CTX_cleanup(&ctx);
 901                 s2n(n,p);
 902                 d+=n;
 903
 904                 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D;
 905                 s->init_num=d-buf;
 906                 s->init_off=0;
 907                 }
 908         /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */
 909         return(ssl2_do_write(s));
 910         }
 911
 912 static int get_server_verify(SSL *s)
 913         {
 914         unsigned char *p;
 915         int i, n, len;
 916
 917         p=(unsigned char *)s->init_buf->data;
 918         if (s->state == SSL2_ST_GET_SERVER_VERIFY_A)
 919                 {
 920                 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
 921                 if (i < (1-s->init_num))
 922                         return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
 923                 s->init_num += i;
 924
 925                 s->state= SSL2_ST_GET_SERVER_VERIFY_B;
 926                 if (*p != SSL2_MT_SERVER_VERIFY)
 927                         {
 928                         if (p[0] != SSL2_MT_ERROR)
 929                                 {
 930                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 931                                 SSLerr(SSL_F_GET_SERVER_VERIFY,
 932                                         SSL_R_READ_WRONG_PACKET_TYPE);
 933                                 }
 934                         else
 935                                 {
 936                                 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_PEER_ERROR);
 937                                 /* try to read the error message */
 938                                 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
 939                                 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
 940                                 }
 941                         return(-1);
 942                         }
 943                 }
 944
 945         p=(unsigned char *)s->init_buf->data;
 946         len = 1 + s->s2->challenge_length;
 947         n =  len - s->init_num;
 948         i = ssl2_read(s,(char *)&(p[s->init_num]),n);
 949         if (i < n)
 950                 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
 951         if (s->msg_callback)
 952                 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */
 953         p += 1;
 954
 955         if (memcmp(p,s->s2->challenge,s->s2->challenge_length) != 0)
 956                 {
 957                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 958                 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT);
 959                 return(-1);
 960                 }
 961         return(1);
 962         }
 963
 964 static int get_server_finished(SSL *s)
 965         {
 966         unsigned char *buf;
 967         unsigned char *p;
 968         int i, n, len;
 969
 970         buf=(unsigned char *)s->init_buf->data;
 971         p=buf;
 972         if (s->state == SSL2_ST_GET_SERVER_FINISHED_A)
 973                 {
 974                 i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num);
 975                 if (i < (1-s->init_num))
 976                         return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
 977                 s->init_num += i;
 978
 979                 if (*p == SSL2_MT_REQUEST_CERTIFICATE)
 980                         {
 981                         s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A;
 982                         return(1);
 983                         }
 984                 else if (*p != SSL2_MT_SERVER_FINISHED)
 985                         {
 986                         if (p[0] != SSL2_MT_ERROR)
 987                                 {
 988                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 989                                 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
 990                                 }
 991                         else
 992                                 {
 993                                 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR);
 994                                 /* try to read the error message */
 995                                 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
 996                                 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
 997                                 }
 998                         return(-1);
 999                         }
1000                 s->state=SSL2_ST_GET_SERVER_FINISHED_B;
1001                 }
1002
1003         len = 1 + SSL2_SSL_SESSION_ID_LENGTH;
1004         n = len - s->init_num;
1005         i = ssl2_read(s,(char *)&(buf[s->init_num]), n);
1006         if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */
1007                 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
1008         s->init_num += i;
1009         if (s->msg_callback)
1010                 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */
1011
1012         if (!s->hit) /* new session */
1013                 {
1014                 /* new session-id */
1015                 /* Make sure we were not trying to re-use an old SSL_SESSION
1016                  * or bad things can happen */
1017                 /* ZZZZZZZZZZZZZ */
1018                 s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
1019                 memcpy(s->session->session_id,p+1,SSL2_SSL_SESSION_ID_LENGTH);
1020                 }
1021         else
1022                 {
1023                 if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG))
1024                         {
1025                         if ((s->session->session_id_length > sizeof s->session->session_id)
1026                             || (0 != memcmp(buf + 1, s->session->session_id,
1027                                             (unsigned int)s->session->session_id_length)))
1028                                 {
1029                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
1030                                 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT);
1031                                 return(-1);
1032                                 }
1033                         }
1034                 }
1035         s->state = SSL_ST_OK;
1036         return(1);
1037         }
1038
1039 /* loads in the certificate from the server */
1040 int ssl2_set_certificate(SSL *s, int type, int len, const unsigned char *data)
1041         {
1042         STACK_OF(X509) *sk=NULL;
1043         EVP_PKEY *pkey=NULL;
1044         SESS_CERT *sc=NULL;
1045         int i;
1046         X509 *x509=NULL;
1047         int ret=0;
1048
1049         x509=d2i_X509(NULL,&data,(long)len);
1050         if (x509 == NULL)
1051                 {
1052                 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB);
1053                 goto err;
1054                 }
1055
1056         if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509))
1057                 {
1058                 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1059                 goto err;
1060                 }
1061
1062         i=ssl_verify_cert_chain(s,sk);
1063
1064         if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
1065                 {
1066                 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1067                 goto err;
1068                 }
1069         ERR_clear_error(); /* but we keep s->verify_result */
1070         s->session->verify_result = s->verify_result;
1071
1072         /* server's cert for this session */
1073         sc=ssl_sess_cert_new();
1074         if (sc == NULL)
1075                 {
1076                 ret= -1;
1077                 goto err;
1078                 }
1079         if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1080         s->session->sess_cert=sc;
1081
1082         sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509;
1083         sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]);
1084
1085         pkey=X509_get_pubkey(x509);
1086         x509=NULL;
1087         if (pkey == NULL)
1088                 {
1089                 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY);
1090                 goto err;
1091                 }
1092         if (pkey->type != EVP_PKEY_RSA)
1093                 {
1094                 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA);
1095                 goto err;
1096                 }
1097
1098         if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE))
1099                 goto err;
1100         ret=1;
1101 err:
1102         sk_X509_free(sk);
1103         X509_free(x509);
1104         EVP_PKEY_free(pkey);
1105         return(ret);
1106         }
1107
1108 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
1109              unsigned char *to, int padding)
1110         {
1111         EVP_PKEY *pkey=NULL;
1112         int i= -1;
1113
1114         if ((sc == NULL) || (sc->peer_key->x509 == NULL) ||
1115                 ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL))
1116                 {
1117                 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY);
1118                 return(-1);
1119                 }
1120         if (pkey->type != EVP_PKEY_RSA)
1121                 {
1122                 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1123                 goto end;
1124                 }
1125
1126         /* we have the public key */
1127         i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding);
1128         if (i < 0)
1129                 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB);
1130 end:
1131         EVP_PKEY_free(pkey);
1132         return(i);
1133         }
1134 #else /* !OPENSSL_NO_SSL2 */
1135
1136 # if PEDANTIC
1137 static void *dummy=&dummy;
1138 # endif
1139
1140 #endif