ssl/s2_srvr.c

   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 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 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 SSL_METHOD *SSLv2_server_method(void)
 141         {
 142         static int init=1;
 143         static SSL_METHOD SSLv2_server_data;
 144
 145         if (init)
 146                 {
 147                 memcpy((char *)&SSLv2_server_data,(char *)sslv2_base_method(),
 148                         sizeof(SSL_METHOD));
 149                 SSLv2_server_data.ssl_accept=ssl2_accept;
 150                 SSLv2_server_data.get_ssl_method=ssl2_get_server_method;
 151                 init=0;
 152                 }
 153         return(&SSLv2_server_data);
 154         }
 155
 156 int ssl2_accept(SSL *s)
 157         {
 158         unsigned long l=time(NULL);
 159         BUF_MEM *buf=NULL;
 160         int ret= -1;
 161         long num1;
 162         void (*cb)()=NULL;
 163         int new_state,state;
 164
 165         RAND_add(&l,sizeof(l),0);
 166         ERR_clear_error();
 167         clear_sys_error();
 168
 169         if (s->info_callback != NULL)
 170                 cb=s->info_callback;
 171         else if (s->ctx->info_callback != NULL)
 172                 cb=s->ctx->info_callback;
 173
 174         /* init things to blank */
 175         s->in_handshake++;
 176         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 177
 178         if (s->cert == NULL)
 179                 {
 180                 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
 181                 return(-1);
 182                 }
 183
 184         clear_sys_error();
 185         for (;;)
 186                 {
 187                 state=s->state;
 188
 189                 switch (s->state)
 190                         {
 191                 case SSL_ST_BEFORE:
 192                 case SSL_ST_ACCEPT:
 193                 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
 194                 case SSL_ST_OK|SSL_ST_ACCEPT:
 195
 196                         s->server=1;
 197                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
 198
 199                         s->version=SSL2_VERSION;
 200                         s->type=SSL_ST_ACCEPT;
 201
 202                         buf=s->init_buf;
 203                         if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
 204                                 { ret= -1; goto end; }
 205                         if (!BUF_MEM_grow(buf,(int)
 206                                 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
 207                                 { ret= -1; goto end; }
 208                         s->init_buf=buf;
 209                         s->init_num=0;
 210                         s->ctx->stats.sess_accept++;
 211                         s->handshake_func=ssl2_accept;
 212                         s->state=SSL2_ST_GET_CLIENT_HELLO_A;
 213                         BREAK;
 214
 215                 case SSL2_ST_GET_CLIENT_HELLO_A:
 216                 case SSL2_ST_GET_CLIENT_HELLO_B:
 217                 case SSL2_ST_GET_CLIENT_HELLO_C:
 218                         s->shutdown=0;
 219                         ret=get_client_hello(s);
 220                         if (ret <= 0) goto end;
 221                         s->init_num=0;
 222                         s->state=SSL2_ST_SEND_SERVER_HELLO_A;
 223                         BREAK;
 224
 225                 case SSL2_ST_SEND_SERVER_HELLO_A:
 226                 case SSL2_ST_SEND_SERVER_HELLO_B:
 227                         ret=server_hello(s);
 228                         if (ret <= 0) goto end;
 229                         s->init_num=0;
 230                         if (!s->hit)
 231                                 {
 232                                 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
 233                                 BREAK;
 234                                 }
 235                         else
 236                                 {
 237                                 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
 238                                 BREAK;
 239                                 }
 240                 case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
 241                 case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
 242                         ret=get_client_master_key(s);
 243                         if (ret <= 0) goto end;
 244                         s->init_num=0;
 245                         s->state=SSL2_ST_SERVER_START_ENCRYPTION;
 246                         BREAK;
 247
 248                 case SSL2_ST_SERVER_START_ENCRYPTION:
 249                         /* Ok we how have sent all the stuff needed to
 250                          * start encrypting, the next packet back will
 251                          * be encrypted. */
 252                         if (!ssl2_enc_init(s,0))
 253                                 { ret= -1; goto end; }
 254                         s->s2->clear_text=0;
 255                         s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
 256                         BREAK;
 257
 258                 case SSL2_ST_SEND_SERVER_VERIFY_A:
 259                 case SSL2_ST_SEND_SERVER_VERIFY_B:
 260                         ret=server_verify(s);
 261                         if (ret <= 0) goto end;
 262                         s->init_num=0;
 263                         if (s->hit)
 264                                 {
 265                                 /* If we are in here, we have been
 266                                  * buffering the output, so we need to
 267                                  * flush it and remove buffering from
 268                                  * future traffic */
 269                                 s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
 270                                 BREAK;
 271                                 }
 272                         else
 273                                 {
 274                                 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
 275                                 break;
 276                                 }
 277
 278                 case SSL2_ST_SEND_SERVER_VERIFY_C:
 279                         /* get the number of bytes to write */
 280                         num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
 281                         if (num1 != 0)
 282                                 {
 283                                 s->rwstate=SSL_WRITING;
 284                                 num1=BIO_flush(s->wbio);
 285                                 if (num1 <= 0) { ret= -1; goto end; }
 286                                 s->rwstate=SSL_NOTHING;
 287                                 }
 288
 289                         /* flushed and now remove buffering */
 290                         s->wbio=BIO_pop(s->wbio);
 291
 292                         s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
 293                         BREAK;
 294
 295                 case SSL2_ST_GET_CLIENT_FINISHED_A:
 296                 case SSL2_ST_GET_CLIENT_FINISHED_B:
 297                         ret=get_client_finished(s);
 298                         if (ret <= 0)
 299                                 goto end;
 300                         s->init_num=0;
 301                         s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
 302                         BREAK;
 303
 304                 case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
 305                 case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
 306                 case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
 307                 case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
 308                         /* don't do a 'request certificate' if we
 309                          * don't want to, or we already have one, and
 310                          * we only want to do it once. */
 311                         if (!(s->verify_mode & SSL_VERIFY_PEER) ||
 312                                 ((s->session->peer != NULL) &&
 313                                 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
 314                                 {
 315                                 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
 316                                 break;
 317                                 }
 318                         else
 319                                 {
 320                                 ret=request_certificate(s);
 321                                 if (ret <= 0) goto end;
 322                                 s->init_num=0;
 323                                 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
 324                                 }
 325                         BREAK;
 326
 327                 case SSL2_ST_SEND_SERVER_FINISHED_A:
 328                 case SSL2_ST_SEND_SERVER_FINISHED_B:
 329                         ret=server_finish(s);
 330                         if (ret <= 0) goto end;
 331                         s->init_num=0;
 332                         s->state=SSL_ST_OK;
 333                         break;
 334
 335                 case SSL_ST_OK:
 336                         BUF_MEM_free(s->init_buf);
 337                         ssl_free_wbio_buffer(s);
 338                         s->init_buf=NULL;
 339                         s->init_num=0;
 340                 /*      ERR_clear_error();*/
 341
 342                         ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
 343
 344                         s->ctx->stats.sess_accept_good++;
 345                         /* s->server=1; */
 346                         ret=1;
 347
 348                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
 349
 350                         goto end;
 351                         /* BREAK; */
 352
 353                 default:
 354                         SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
 355                         ret= -1;
 356                         goto end;
 357                         /* BREAK; */
 358                         }
 359
 360                 if ((cb != NULL) && (s->state != state))
 361                         {
 362                         new_state=s->state;
 363                         s->state=state;
 364                         cb(s,SSL_CB_ACCEPT_LOOP,1);
 365                         s->state=new_state;
 366                         }
 367                 }
 368 end:
 369         s->in_handshake--;
 370         if (cb != NULL)
 371                 cb(s,SSL_CB_ACCEPT_EXIT,ret);
 372         return(ret);
 373         }
 374
 375 static int get_client_master_key(SSL *s)
 376         {
 377         int is_export,i,n,keya,ek;
 378         unsigned long len;
 379         unsigned char *p;
 380         SSL_CIPHER *cp;
 381         const EVP_CIPHER *c;
 382         const EVP_MD *md;
 383
 384         p=(unsigned char *)s->init_buf->data;
 385         if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
 386                 {
 387                 i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
 388
 389                 if (i < (10-s->init_num))
 390                         return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
 391                 s->init_num = 10;
 392
 393                 if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
 394                         {
 395                         if (p[-1] != SSL2_MT_ERROR)
 396                                 {
 397                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 398                                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
 399                                 }
 400                         else
 401                                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,
 402                                         SSL_R_PEER_ERROR);
 403                         return(-1);
 404                         }
 405
 406                 cp=ssl2_get_cipher_by_char(p);
 407                 if (cp == NULL)
 408                         {
 409                         ssl2_return_error(s,SSL2_PE_NO_CIPHER);
 410                         SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,
 411                                 SSL_R_NO_CIPHER_MATCH);
 412                         return(-1);
 413                         }
 414                 s->session->cipher= cp;
 415
 416                 p+=3;
 417                 n2s(p,i); s->s2->tmp.clear=i;
 418                 n2s(p,i); s->s2->tmp.enc=i;
 419                 n2s(p,i); s->session->key_arg_length=i;
 420                 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
 421                 }
 422
 423         /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
 424         p=(unsigned char *)s->init_buf->data;
 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                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
 430                 return -1;
 431                 }
 432         n = (int)len - s->init_num;
 433         i = ssl2_read(s,(char *)&(p[s->init_num]),n);
 434         if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
 435         if (s->msg_callback)
 436                 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */
 437         p += 10;
 438
 439         memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
 440                 (unsigned int)keya);
 441
 442         if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
 443                 {
 444                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 445                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
 446                 return(-1);
 447                 }
 448         i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
 449                 &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
 450                 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
 451
 452         is_export=SSL_C_IS_EXPORT(s->session->cipher);
 453
 454         if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
 455                 {
 456                 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
 457                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
 458                 return(0);
 459                 }
 460
 461         if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
 462                 {
 463                 is_export=1;
 464                 ek=8;
 465                 }
 466         else
 467                 ek=5;
 468
 469         /* bad decrypt */
 470 #if 1
 471         /* If a bad decrypt, continue with protocol but with a
 472          * random master secret (Bleichenbacher attack) */
 473         if ((i < 0) ||
 474                 ((!is_export && (i != EVP_CIPHER_key_length(c)))
 475                 || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i !=
 476                         (unsigned int)EVP_CIPHER_key_length(c))))))
 477                 {
 478                 ERR_clear_error();
 479                 if (is_export)
 480                         i=ek;
 481                 else
 482                         i=EVP_CIPHER_key_length(c);
 483                 RAND_pseudo_bytes(p,i);
 484                 }
 485 #else
 486         if (i < 0)
 487                 {
 488                 error=1;
 489                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
 490                 }
 491         /* incorrect number of key bytes for non export cipher */
 492         else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
 493                 || (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
 494                         EVP_CIPHER_key_length(c)))))
 495                 {
 496                 error=1;
 497                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
 498                 }
 499         if (error)
 500                 {
 501                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 502                 return(-1);
 503                 }
 504 #endif
 505
 506         if (is_export) i+=s->s2->tmp.clear;
 507         s->session->master_key_length=i;
 508         memcpy(s->session->master_key,p,(unsigned int)i);
 509         return(1);
 510         }
 511
 512 static int get_client_hello(SSL *s)
 513         {
 514         int i,n;
 515         unsigned long len;
 516         unsigned char *p;
 517         STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
 518         STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
 519         STACK_OF(SSL_CIPHER) *prio, *allow;
 520         int z;
 521
 522         /* This is a bit of a hack to check for the correct packet
 523          * type the first time round. */
 524         if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
 525                 {
 526                 s->first_packet=1;
 527                 s->state=SSL2_ST_GET_CLIENT_HELLO_B;
 528                 }
 529
 530         p=(unsigned char *)s->init_buf->data;
 531         if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
 532                 {
 533                 i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
 534                 if (i < (9-s->init_num))
 535                         return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
 536                 s->init_num = 9;
 537
 538                 if (*(p++) != SSL2_MT_CLIENT_HELLO)
 539                         {
 540                         if (p[-1] != SSL2_MT_ERROR)
 541                                 {
 542                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 543                                 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
 544                                 }
 545                         else
 546                                 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
 547                         return(-1);
 548                         }
 549                 n2s(p,i);
 550                 if (i < s->version) s->version=i;
 551                 n2s(p,i); s->s2->tmp.cipher_spec_length=i;
 552                 n2s(p,i); s->s2->tmp.session_id_length=i;
 553                 n2s(p,i); s->s2->challenge_length=i;
 554                 if (    (i < SSL2_MIN_CHALLENGE_LENGTH) ||
 555                         (i > SSL2_MAX_CHALLENGE_LENGTH))
 556                         {
 557                         SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
 558                         return(-1);
 559                         }
 560                 s->state=SSL2_ST_GET_CLIENT_HELLO_C;
 561                 }
 562
 563         /* SSL2_ST_GET_CLIENT_HELLO_C */
 564         p=(unsigned char *)s->init_buf->data;
 565         len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length;
 566         if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
 567                 {
 568                 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG);
 569                 return -1;
 570                 }
 571         n = (int)len - s->init_num;
 572         i = ssl2_read(s,(char *)&(p[s->init_num]),n);
 573         if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
 574         if (s->msg_callback)
 575                 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */
 576         p += 9;
 577
 578         /* get session-id before cipher stuff so we can get out session
 579          * structure if it is cached */
 580         /* session-id */
 581         if ((s->s2->tmp.session_id_length != 0) &&
 582                 (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
 583                 {
 584                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 585                 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
 586                 return(-1);
 587                 }
 588
 589         if (s->s2->tmp.session_id_length == 0)
 590                 {
 591                 if (!ssl_get_new_session(s,1))
 592                         {
 593                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 594                         return(-1);
 595                         }
 596                 }
 597         else
 598                 {
 599                 i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
 600                         s->s2->tmp.session_id_length);
 601                 if (i == 1)
 602                         { /* previous session */
 603                         s->hit=1;
 604                         }
 605                 else if (i == -1)
 606                         {
 607                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 608                         return(-1);
 609                         }
 610                 else
 611                         {
 612                         if (s->cert == NULL)
 613                                 {
 614                                 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
 615                                 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
 616                                 return(-1);
 617                                 }
 618
 619                         if (!ssl_get_new_session(s,1))
 620                                 {
 621                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 622                                 return(-1);
 623                                 }
 624                         }
 625                 }
 626
 627         if (!s->hit)
 628                 {
 629                 cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
 630                         &s->session->ciphers);
 631                 if (cs == NULL) goto mem_err;
 632
 633                 cl=SSL_get_ciphers(s);
 634
 635                 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
 636                     {
 637                     prio=sk_SSL_CIPHER_dup(cl);
 638                     if (prio == NULL) goto mem_err;
 639                     allow = cs;
 640                     }
 641                 else
 642                     {
 643                     prio = cs;
 644                     allow = cl;
 645                     }
 646                 for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
 647                         {
 648                         if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
 649                                 {
 650                                 sk_SSL_CIPHER_delete(prio,z);
 651                                 z--;
 652                                 }
 653                         }
 654                 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
 655                     {
 656                     sk_SSL_CIPHER_free(s->session->ciphers);
 657                     s->session->ciphers = prio;
 658                     }
 659                 /* s->session->ciphers should now have a list of
 660                  * ciphers that are on both the client and server.
 661                  * This list is ordered by the order the client sent
 662                  * the ciphers or in the order of the server's preference
 663                  * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
 664                  */
 665                 }
 666         p+=s->s2->tmp.cipher_spec_length;
 667         /* done cipher selection */
 668
 669         /* session id extracted already */
 670         p+=s->s2->tmp.session_id_length;
 671
 672         /* challenge */
 673         memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
 674         return(1);
 675 mem_err:
 676         SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
 677         return(0);
 678         }
 679
 680 static int server_hello(SSL *s)
 681         {
 682         unsigned char *p,*d;
 683         int n,hit;
 684         STACK_OF(SSL_CIPHER) *sk;
 685
 686         p=(unsigned char *)s->init_buf->data;
 687         if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
 688                 {
 689                 d=p+11;
 690                 *(p++)=SSL2_MT_SERVER_HELLO;            /* type */
 691                 hit=s->hit;
 692                 *(p++)=(unsigned char)hit;
 693 #if 1
 694                 if (!hit)
 695                         {
 696                         if (s->session->sess_cert != NULL)
 697                                 /* This can't really happen because get_client_hello
 698                                  * has called ssl_get_new_session, which does not set
 699                                  * sess_cert. */
 700                                 ssl_sess_cert_free(s->session->sess_cert);
 701                         s->session->sess_cert = ssl_sess_cert_new();
 702                         if (s->session->sess_cert == NULL)
 703                                 {
 704                                 SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
 705                                 return(-1);
 706                                 }
 707                         }
 708                 /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
 709                  * depending on whether it survived in the internal cache
 710                  * or was retrieved from an external cache.
 711                  * If it is NULL, we cannot put any useful data in it anyway,
 712                  * so we don't touch it.
 713                  */
 714
 715 #else /* That's what used to be done when cert_st and sess_cert_st were
 716            * the same. */
 717                 if (!hit)
 718                         {                       /* else add cert to session */
 719                         CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 720                         if (s->session->sess_cert != NULL)
 721                                 ssl_cert_free(s->session->sess_cert);
 722                         s->session->sess_cert=s->cert;
 723                         }
 724                 else    /* We have a session id-cache hit, if the
 725                          * session-id has no certificate listed against
 726                          * the 'cert' structure, grab the 'old' one
 727                          * listed against the SSL connection */
 728                         {
 729                         if (s->session->sess_cert == NULL)
 730                                 {
 731                                 CRYPTO_add(&s->cert->references,1,
 732                                         CRYPTO_LOCK_SSL_CERT);
 733                                 s->session->sess_cert=s->cert;
 734                                 }
 735                         }
 736 #endif
 737
 738                 if (s->cert == NULL)
 739                         {
 740                         ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
 741                         SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
 742                         return(-1);
 743                         }
 744
 745                 if (hit)
 746                         {
 747                         *(p++)=0;               /* no certificate type */
 748                         s2n(s->version,p);      /* version */
 749                         s2n(0,p);               /* cert len */
 750                         s2n(0,p);               /* ciphers len */
 751                         }
 752                 else
 753                         {
 754                         /* EAY EAY */
 755                         /* put certificate type */
 756                         *(p++)=SSL2_CT_X509_CERTIFICATE;
 757                         s2n(s->version,p);      /* version */
 758                         n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
 759                         s2n(n,p);               /* certificate length */
 760                         i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
 761                         n=0;
 762
 763                         /* lets send out the ciphers we like in the
 764                          * prefered order */
 765                         sk= s->session->ciphers;
 766                         n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d);
 767                         d+=n;
 768                         s2n(n,p);               /* add cipher length */
 769                         }
 770
 771                 /* make and send conn_id */
 772                 s2n(SSL2_CONNECTION_ID_LENGTH,p);       /* add conn_id length */
 773                 s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
 774                 RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length);
 775                 memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
 776                 d+=SSL2_CONNECTION_ID_LENGTH;
 777
 778                 s->state=SSL2_ST_SEND_SERVER_HELLO_B;
 779                 s->init_num=d-(unsigned char *)s->init_buf->data;
 780                 s->init_off=0;
 781                 }
 782         /* SSL2_ST_SEND_SERVER_HELLO_B */
 783         /* If we are using TCP/IP, the performance is bad if we do 2
 784          * writes without a read between them.  This occurs when
 785          * Session-id reuse is used, so I will put in a buffering module
 786          */
 787         if (s->hit)
 788                 {
 789                 if (!ssl_init_wbio_buffer(s,1)) return(-1);
 790                 }
 791
 792         return(ssl2_do_write(s));
 793         }
 794
 795 static int get_client_finished(SSL *s)
 796         {
 797         unsigned char *p;
 798         int i, n;
 799         unsigned long len;
 800
 801         p=(unsigned char *)s->init_buf->data;
 802         if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
 803                 {
 804                 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
 805                 if (i < 1-s->init_num)
 806                         return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
 807                 s->init_num += i;
 808
 809                 if (*p != SSL2_MT_CLIENT_FINISHED)
 810                         {
 811                         if (*p != SSL2_MT_ERROR)
 812                                 {
 813                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 814                                 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
 815                                 }
 816                         else
 817                                 {
 818                                 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
 819                                 /* try to read the error message */
 820                                 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
 821                                 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
 822                                 }
 823                         return(-1);
 824                         }
 825                 s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
 826                 }
 827
 828         /* SSL2_ST_GET_CLIENT_FINISHED_B */
 829         len = 1 + (unsigned long)s->s2->conn_id_length;
 830         n = (int)len - s->init_num;
 831         i = ssl2_read(s,(char *)&(p[s->init_num]),n);
 832         if (i < n)
 833                 {
 834                 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
 835                 }
 836         if (s->msg_callback)
 837                 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */
 838         p += 1;
 839         if (memcmp(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length) != 0)
 840                 {
 841                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 842                 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
 843                 return(-1);
 844                 }
 845         return(1);
 846         }
 847
 848 static int server_verify(SSL *s)
 849         {
 850         unsigned char *p;
 851
 852         if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
 853                 {
 854                 p=(unsigned char *)s->init_buf->data;
 855                 *(p++)=SSL2_MT_SERVER_VERIFY;
 856                 memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
 857                 /* p+=s->s2->challenge_length; */
 858
 859                 s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
 860                 s->init_num=s->s2->challenge_length+1;
 861                 s->init_off=0;
 862                 }
 863         return(ssl2_do_write(s));
 864         }
 865
 866 static int server_finish(SSL *s)
 867         {
 868         unsigned char *p;
 869
 870         if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
 871                 {
 872                 p=(unsigned char *)s->init_buf->data;
 873                 *(p++)=SSL2_MT_SERVER_FINISHED;
 874
 875                 memcpy(p,s->session->session_id,
 876                         (unsigned int)s->session->session_id_length);
 877                 /* p+=s->session->session_id_length; */
 878
 879                 s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
 880                 s->init_num=s->session->session_id_length+1;
 881                 s->init_off=0;
 882                 }
 883
 884         /* SSL2_ST_SEND_SERVER_FINISHED_B */
 885         return(ssl2_do_write(s));
 886         }
 887
 888 /* send the request and check the response */
 889 static int request_certificate(SSL *s)
 890         {
 891         unsigned char *p,*p2,*buf2;
 892         unsigned char *ccd;
 893         int i,j,ctype,ret= -1;
 894         unsigned long len;
 895         X509 *x509=NULL;
 896         STACK_OF(X509) *sk=NULL;
 897
 898         ccd=s->s2->tmp.ccl;
 899         if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
 900                 {
 901                 p=(unsigned char *)s->init_buf->data;
 902                 *(p++)=SSL2_MT_REQUEST_CERTIFICATE;
 903                 *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
 904                 RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
 905                 memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
 906
 907                 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
 908                 s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
 909                 s->init_off=0;
 910                 }
 911
 912         if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
 913                 {
 914                 i=ssl2_do_write(s);
 915                 if (i <= 0)
 916                         {
 917                         ret=i;
 918                         goto end;
 919                         }
 920
 921                 s->init_num=0;
 922                 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
 923                 }
 924
 925         if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
 926                 {
 927                 p=(unsigned char *)s->init_buf->data;
 928                 i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */
 929                 if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3
 930                                         * (probably NO-CERTIFICATE-ERROR) */
 931                         {
 932                         ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
 933                         goto end;
 934                         }
 935                 s->init_num += i;
 936
 937                 if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR))
 938                         {
 939                         n2s(p,i);
 940                         if (i != SSL2_PE_NO_CERTIFICATE)
 941                                 {
 942                                 /* not the error message we expected -- let ssl2_part_read handle it */
 943                                 s->init_num -= 3;
 944                                 ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3);
 945                                 goto end;
 946                                 }
 947
 948                         if (s->msg_callback)
 949                                 s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */
 950
 951                         /* this is the one place where we can recover from an SSL 2.0 error */
 952
 953                         if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
 954                                 {
 955                                 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
 956                                 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
 957                                 goto end;
 958                                 }
 959                         ret=1;
 960                         goto end;
 961                         }
 962                 if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6))
 963                         {
 964                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 965                         SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
 966                         goto end;
 967                         }
 968                 if (s->init_num != 6)
 969                         {
 970                         SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR);
 971                         goto end;
 972                         }
 973
 974                 /* ok we have a response */
 975                 /* certificate type, there is only one right now. */
 976                 ctype= *(p++);
 977                 if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
 978                         {
 979                         ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
 980                         SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
 981                         goto end;
 982                         }
 983                 n2s(p,i); s->s2->tmp.clen=i;
 984                 n2s(p,i); s->s2->tmp.rlen=i;
 985                 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
 986                 }
 987
 988         /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
 989         p=(unsigned char *)s->init_buf->data;
 990         len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen;
 991         if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
 992                 {
 993                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
 994                 goto end;
 995                 }
 996         j = (int)len - s->init_num;
 997         i = ssl2_read(s,(char *)&(p[s->init_num]),j);
 998         if (i < j)
 999                 {
1000                 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
1001                 goto end;
1002                 }
1003         if (s->msg_callback)
1004                 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */
1005         p += 6;
1006
1007         x509=(X509 *)d2i_X509(NULL,&p,(long)s->s2->tmp.clen);
1008         if (x509 == NULL)
1009                 {
1010                 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
1011                 goto msg_end;
1012                 }
1013
1014         if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509)))
1015                 {
1016                 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1017                 goto msg_end;
1018                 }
1019
1020         i=ssl_verify_cert_chain(s,sk);
1021
1022         if (i)  /* we like the packet, now check the chksum */
1023                 {
1024                 EVP_MD_CTX ctx;
1025                 EVP_PKEY *pkey=NULL;
1026
1027                 EVP_MD_CTX_init(&ctx);
1028                 EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL);
1029                 EVP_VerifyUpdate(&ctx,s->s2->key_material,
1030                         (unsigned int)s->s2->key_material_length);
1031                 EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
1032
1033                 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
1034                 buf2=OPENSSL_malloc((unsigned int)i);
1035                 if (buf2 == NULL)
1036                         {
1037                         SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1038                         goto msg_end;
1039                         }
1040                 p2=buf2;
1041                 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
1042                 EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i);
1043                 OPENSSL_free(buf2);
1044
1045                 pkey=X509_get_pubkey(x509);
1046                 if (pkey == NULL) goto end;
1047                 i=EVP_VerifyFinal(&ctx,p,s->s2->tmp.rlen,pkey);
1048                 EVP_PKEY_free(pkey);
1049                 EVP_MD_CTX_cleanup(&ctx);
1050
1051                 if (i)
1052                         {
1053                         if (s->session->peer != NULL)
1054                                 X509_free(s->session->peer);
1055                         s->session->peer=x509;
1056                         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
1057                         s->session->verify_result = s->verify_result;
1058                         ret=1;
1059                         goto end;
1060                         }
1061                 else
1062                         {
1063                         SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
1064                         goto msg_end;
1065                         }
1066                 }
1067         else
1068                 {
1069 msg_end:
1070                 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
1071                 }
1072 end:
1073         sk_X509_free(sk);
1074         X509_free(x509);
1075         return(ret);
1076         }
1077
1078 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
1079              unsigned char *to, int padding)
1080         {
1081         RSA *rsa;
1082         int i;
1083
1084         if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
1085                 {
1086                 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
1087                 return(-1);
1088                 }
1089         if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
1090                 {
1091                 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1092                 return(-1);
1093                 }
1094         rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
1095
1096         /* we have the public key */
1097         i=RSA_private_decrypt(len,from,to,rsa,padding);
1098         if (i < 0)
1099                 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
1100         return(i);
1101         }
1102 #else /* !OPENSSL_NO_SSL2 */
1103
1104 # if PEDANTIC
1105 static void *dummy=&dummy;
1106 # endif
1107
1108 #endif