crypto/openssl/ssl/s2_pkt.c

   1 /* ssl/s2_pkt.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  * $FreeBSD$
  59  */
  60
  61 #ifndef NO_SSL2
  62
  63 #include <stdio.h>
  64 #include <errno.h>
  65 #define USE_SOCKETS
  66 #include "ssl_locl.h"
  67
  68 static int read_n(SSL *s,unsigned int n,unsigned int max,unsigned int extend);
  69 static int do_ssl_write(SSL *s, const unsigned char *buf, unsigned int len);
  70 static int write_pending(SSL *s, const unsigned char *buf, unsigned int len);
  71 static int ssl_mt_error(int n);
  72 int ssl2_peek(SSL *s, char *buf, int len)
  73         {
  74         int ret;
  75
  76         ret=ssl2_read(s,buf,len);
  77         if (ret > 0)
  78                 {
  79                 s->s2->ract_data_length+=ret;
  80                 s->s2->ract_data-=ret;
  81                 }
  82         return(ret);
  83         }
  84
  85 /* SSL_read -
  86  * This routine will return 0 to len bytes, decrypted etc if required.
  87  */
  88 int ssl2_read(SSL *s, void *buf, int len)
  89         {
  90         int n;
  91         unsigned char mac[MAX_MAC_SIZE];
  92         unsigned char *p;
  93         int i;
  94         unsigned int mac_size=0;
  95
  96 ssl2_read_again:
  97         if (SSL_in_init(s) && !s->in_handshake)
  98                 {
  99                 n=s->handshake_func(s);
 100                 if (n < 0) return(n);
 101                 if (n == 0)
 102                         {
 103                         SSLerr(SSL_F_SSL2_READ,SSL_R_SSL_HANDSHAKE_FAILURE);
 104                         return(-1);
 105                         }
 106                 }
 107
 108         clear_sys_error();
 109         s->rwstate=SSL_NOTHING;
 110         if (len <= 0) return(len);
 111
 112         if (s->s2->ract_data_length != 0) /* read from buffer */
 113                 {
 114                 if (len > s->s2->ract_data_length)
 115                         n=s->s2->ract_data_length;
 116                 else
 117                         n=len;
 118
 119                 memcpy(buf,s->s2->ract_data,(unsigned int)n);
 120                 s->s2->ract_data_length-=n;
 121                 s->s2->ract_data+=n;
 122                 if (s->s2->ract_data_length == 0)
 123                         s->rstate=SSL_ST_READ_HEADER;
 124                 return(n);
 125                 }
 126
 127         if (s->rstate == SSL_ST_READ_HEADER)
 128                 {
 129                 if (s->first_packet)
 130                         {
 131                         n=read_n(s,5,SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2,0);
 132                         if (n <= 0) return(n); /* error or non-blocking */
 133                         s->first_packet=0;
 134                         p=s->packet;
 135                         if (!((p[0] & 0x80) && (
 136                                 (p[2] == SSL2_MT_CLIENT_HELLO) ||
 137                                 (p[2] == SSL2_MT_SERVER_HELLO))))
 138                                 {
 139                                 SSLerr(SSL_F_SSL2_READ,SSL_R_NON_SSLV2_INITIAL_PACKET);
 140                                 return(-1);
 141                                 }
 142                         }
 143                 else
 144                         {
 145                         n=read_n(s,2,SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2,0);
 146                         if (n <= 0) return(n); /* error or non-blocking */
 147                         }
 148                 /* part read stuff */
 149
 150                 s->rstate=SSL_ST_READ_BODY;
 151                 p=s->packet;
 152                 /* Do header */
 153                 /*s->s2->padding=0;*/
 154                 s->s2->escape=0;
 155                 s->s2->rlength=(((unsigned int)p[0])<<8)|((unsigned int)p[1]);
 156                 if ((p[0] & TWO_BYTE_BIT))              /* Two byte header? */
 157                         {
 158                         s->s2->three_byte_header=0;
 159                         s->s2->rlength&=TWO_BYTE_MASK;
 160                         }
 161                 else
 162                         {
 163                         s->s2->three_byte_header=1;
 164                         s->s2->rlength&=THREE_BYTE_MASK;
 165
 166                         /* security >s2->escape */
 167                         s->s2->escape=((p[0] & SEC_ESC_BIT))?1:0;
 168                         }
 169                 }
 170
 171         if (s->rstate == SSL_ST_READ_BODY)
 172                 {
 173                 n=s->s2->rlength+2+s->s2->three_byte_header;
 174                 if (n > (int)s->packet_length)
 175                         {
 176                         n-=s->packet_length;
 177                         i=read_n(s,(unsigned int)n,(unsigned int)n,1);
 178                         if (i <= 0) return(i); /* ERROR */
 179                         }
 180
 181                 p= &(s->packet[2]);
 182                 s->rstate=SSL_ST_READ_HEADER;
 183                 if (s->s2->three_byte_header)
 184                         s->s2->padding= *(p++);
 185                 else    s->s2->padding=0;
 186
 187                 /* Data portion */
 188                 if (s->s2->clear_text)
 189                         {
 190                         s->s2->mac_data=p;
 191                         s->s2->ract_data=p;
 192                         s->s2->pad_data=NULL;
 193                         }
 194                 else
 195                         {
 196                         mac_size=EVP_MD_size(s->read_hash);
 197                         s->s2->mac_data=p;
 198                         s->s2->ract_data= &p[mac_size];
 199                         s->s2->pad_data= &p[mac_size+
 200                                 s->s2->rlength-s->s2->padding];
 201                         }
 202
 203                 s->s2->ract_data_length=s->s2->rlength;
 204                 /* added a check for length > max_size in case
 205                  * encryption was not turned on yet due to an error */
 206                 if ((!s->s2->clear_text) &&
 207                         (s->s2->rlength >= mac_size))
 208                         {
 209                         ssl2_enc(s,0);
 210                         s->s2->ract_data_length-=mac_size;
 211                         ssl2_mac(s,mac,0);
 212                         s->s2->ract_data_length-=s->s2->padding;
 213                         if (    (memcmp(mac,s->s2->mac_data,
 214                                 (unsigned int)mac_size) != 0) ||
 215                                 (s->s2->rlength%EVP_CIPHER_CTX_block_size(s->enc_read_ctx) != 0))
 216                                 {
 217                                 SSLerr(SSL_F_SSL2_READ,SSL_R_BAD_MAC_DECODE);
 218                                 return(-1);
 219                                 }
 220                         }
 221                 INC32(s->s2->read_sequence); /* expect next number */
 222                 /* s->s2->ract_data is now available for processing */
 223
 224 #if 1
 225                 /* How should we react when a packet containing 0
 226                  * bytes is received?  (Note that SSLeay/OpenSSL itself
 227                  * never sends such packets; see ssl2_write.)
 228                  * Returning 0 would be interpreted by the caller as
 229                  * indicating EOF, so it's not a good idea.
 230                  * Instead, we just continue reading.  Note that using
 231                  * select() for blocking sockets *never* guarantees
 232                  * that the next SSL_read will not block -- the available
 233                  * data may contain incomplete packets, and except for SSL 2
 234                  * renegotiation can confuse things even more. */
 235
 236                 goto ssl2_read_again; /* This should really be
 237                                        * "return ssl2_read(s,buf,len)",
 238                                        * but that would allow for
 239                                        * denial-of-service attacks if a
 240                                        * C compiler is used that does not
 241                                        * recognize end-recursion. */
 242 #else
 243                 /* If a 0 byte packet was sent, return 0, otherwise
 244                  * we play havoc with people using select with
 245                  * blocking sockets.  Let them handle a packet at a time,
 246                  * they should really be using non-blocking sockets. */
 247                 if (s->s2->ract_data_length == 0)
 248                         return(0);
 249                 return(ssl2_read(s,buf,len));
 250 #endif
 251                 }
 252         else
 253                 {
 254                 SSLerr(SSL_F_SSL2_READ,SSL_R_BAD_STATE);
 255                         return(-1);
 256                 }
 257         }
 258
 259 static int read_n(SSL *s, unsigned int n, unsigned int max,
 260              unsigned int extend)
 261         {
 262         int i,off,newb;
 263
 264         /* if there is stuff still in the buffer from a previous read,
 265          * and there is more than we want, take some. */
 266         if (s->s2->rbuf_left >= (int)n)
 267                 {
 268                 if (extend)
 269                         s->packet_length+=n;
 270                 else
 271                         {
 272                         s->packet= &(s->s2->rbuf[s->s2->rbuf_offs]);
 273                         s->packet_length=n;
 274                         }
 275                 s->s2->rbuf_left-=n;
 276                 s->s2->rbuf_offs+=n;
 277                 return(n);
 278                 }
 279
 280         if (!s->read_ahead) max=n;
 281         if (max > (unsigned int)(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2))
 282                 max=SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2;
 283
 284
 285         /* Else we want more than we have.
 286          * First, if there is some left or we want to extend */
 287         off=0;
 288         if ((s->s2->rbuf_left != 0) || ((s->packet_length != 0) && extend))
 289                 {
 290                 newb=s->s2->rbuf_left;
 291                 if (extend)
 292                         {
 293                         off=s->packet_length;
 294                         if (s->packet != s->s2->rbuf)
 295                                 memcpy(s->s2->rbuf,s->packet,
 296                                         (unsigned int)newb+off);
 297                         }
 298                 else if (s->s2->rbuf_offs != 0)
 299                         {
 300                         memcpy(s->s2->rbuf,&(s->s2->rbuf[s->s2->rbuf_offs]),
 301                                 (unsigned int)newb);
 302                         s->s2->rbuf_offs=0;
 303                         }
 304                 s->s2->rbuf_left=0;
 305                 }
 306         else
 307                 newb=0;
 308
 309         /* off is the offset to start writing too.
 310          * r->s2->rbuf_offs is the 'unread data', now 0.
 311          * newb is the number of new bytes so far
 312          */
 313         s->packet=s->s2->rbuf;
 314         while (newb < (int)n)
 315                 {
 316                 clear_sys_error();
 317                 if (s->rbio != NULL)
 318                         {
 319                         s->rwstate=SSL_READING;
 320                         i=BIO_read(s->rbio,(char *)&(s->s2->rbuf[off+newb]),
 321                                 max-newb);
 322                         }
 323                 else
 324                         {
 325                         SSLerr(SSL_F_READ_N,SSL_R_READ_BIO_NOT_SET);
 326                         i= -1;
 327                         }
 328 #ifdef PKT_DEBUG
 329                 if (s->debug & 0x01) sleep(1);
 330 #endif
 331                 if (i <= 0)
 332                         {
 333                         s->s2->rbuf_left+=newb;
 334                         return(i);
 335                         }
 336                 newb+=i;
 337                 }
 338
 339         /* record unread data */
 340         if (newb > (int)n)
 341                 {
 342                 s->s2->rbuf_offs=n+off;
 343                 s->s2->rbuf_left=newb-n;
 344                 }
 345         else
 346                 {
 347                 s->s2->rbuf_offs=0;
 348                 s->s2->rbuf_left=0;
 349                 }
 350         if (extend)
 351                 s->packet_length+=n;
 352         else
 353                 s->packet_length=n;
 354         s->rwstate=SSL_NOTHING;
 355         return(n);
 356         }
 357
 358 int ssl2_write(SSL *s, const void *_buf, int len)
 359         {
 360         const unsigned char *buf=_buf;
 361         unsigned int n,tot;
 362         int i;
 363
 364         if (SSL_in_init(s) && !s->in_handshake)
 365                 {
 366                 i=s->handshake_func(s);
 367                 if (i < 0) return(i);
 368                 if (i == 0)
 369                         {
 370                         SSLerr(SSL_F_SSL2_WRITE,SSL_R_SSL_HANDSHAKE_FAILURE);
 371                         return(-1);
 372                         }
 373                 }
 374
 375         if (s->error)
 376                 {
 377                 ssl2_write_error(s);
 378                 if (s->error)
 379                         return(-1);
 380                 }
 381
 382         clear_sys_error();
 383         s->rwstate=SSL_NOTHING;
 384         if (len <= 0) return(len);
 385
 386         tot=s->s2->wnum;
 387         s->s2->wnum=0;
 388
 389         n=(len-tot);
 390         for (;;)
 391                 {
 392                 i=do_ssl_write(s,&(buf[tot]),n);
 393                 if (i <= 0)
 394                         {
 395                         s->s2->wnum=tot;
 396                         return(i);
 397                         }
 398                 if ((i == (int)n) ||
 399                         (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))
 400                         {
 401                         return(tot+i);
 402                         }
 403
 404                 n-=i;
 405                 tot+=i;
 406                 }
 407         }
 408
 409 static int write_pending(SSL *s, const unsigned char *buf, unsigned int len)
 410         {
 411         int i;
 412
 413         /* s->s2->wpend_len != 0 MUST be true. */
 414
 415         /* check that they have given us the same buffer to
 416          * write */
 417         if ((s->s2->wpend_tot > (int)len) ||
 418                 ((s->s2->wpend_buf != buf) &&
 419                  !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)))
 420                 {
 421                 SSLerr(SSL_F_WRITE_PENDING,SSL_R_BAD_WRITE_RETRY);
 422                 return(-1);
 423                 }
 424
 425         for (;;)
 426                 {
 427                 clear_sys_error();
 428                 if (s->wbio != NULL)
 429                         {
 430                         s->rwstate=SSL_WRITING;
 431                         i=BIO_write(s->wbio,
 432                                 (char *)&(s->s2->write_ptr[s->s2->wpend_off]),
 433                                 (unsigned int)s->s2->wpend_len);
 434                         }
 435                 else
 436                         {
 437                         SSLerr(SSL_F_WRITE_PENDING,SSL_R_WRITE_BIO_NOT_SET);
 438                         i= -1;
 439                         }
 440 #ifdef PKT_DEBUG
 441                 if (s->debug & 0x01) sleep(1);
 442 #endif
 443                 if (i == s->s2->wpend_len)
 444                         {
 445                         s->s2->wpend_len=0;
 446                         s->rwstate=SSL_NOTHING;
 447                         return(s->s2->wpend_ret);
 448                         }
 449                 else if (i <= 0)
 450                         return(i);
 451                 s->s2->wpend_off+=i;
 452                 s->s2->wpend_len-=i;
 453                 }
 454         }
 455
 456 static int do_ssl_write(SSL *s, const unsigned char *buf, unsigned int len)
 457         {
 458         unsigned int j,k,olen,p,mac_size,bs;
 459         register unsigned char *pp;
 460
 461         olen=len;
 462
 463         /* first check if there is data from an encryption waiting to
 464          * be sent - it must be sent because the other end is waiting.
 465          * This will happen with non-blocking IO.  We print it and then
 466          * return.
 467          */
 468         if (s->s2->wpend_len != 0) return(write_pending(s,buf,len));
 469
 470         /* set mac_size to mac size */
 471         if (s->s2->clear_text)
 472                 mac_size=0;
 473         else
 474                 mac_size=EVP_MD_size(s->write_hash);
 475
 476         /* lets set the pad p */
 477         if (s->s2->clear_text)
 478                 {
 479                 if (len > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER)
 480                         len=SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER;
 481                 p=0;
 482                 s->s2->three_byte_header=0;
 483                 /* len=len; */
 484                 }
 485         else
 486                 {
 487                 bs=EVP_CIPHER_CTX_block_size(s->enc_read_ctx);
 488                 j=len+mac_size;
 489                 if ((j > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) &&
 490                         (!s->s2->escape))
 491                         {
 492                         if (j > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER)
 493                                 j=SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER;
 494                         /* set k to the max number of bytes with 2
 495                          * byte header */
 496                         k=j-(j%bs);
 497                         /* how many data bytes? */
 498                         len=k-mac_size;
 499                         s->s2->three_byte_header=0;
 500                         p=0;
 501                         }
 502                 else if ((bs <= 1) && (!s->s2->escape))
 503                         {
 504                         /* len=len; */
 505                         s->s2->three_byte_header=0;
 506                         p=0;
 507                         }
 508                 else /* 3 byte header */
 509                         {
 510                         /*len=len; */
 511                         p=(j%bs);
 512                         p=(p == 0)?0:(bs-p);
 513                         if (s->s2->escape)
 514                                 s->s2->three_byte_header=1;
 515                         else
 516                                 s->s2->three_byte_header=(p == 0)?0:1;
 517                         }
 518                 }
 519         /* mac_size is the number of MAC bytes
 520          * len is the number of data bytes we are going to send
 521          * p is the number of padding bytes
 522          * if p == 0, it is a 2 byte header */
 523
 524         s->s2->wlength=len;
 525         s->s2->padding=p;
 526         s->s2->mac_data= &(s->s2->wbuf[3]);
 527         s->s2->wact_data= &(s->s2->wbuf[3+mac_size]);
 528         /* we copy the data into s->s2->wbuf */
 529         memcpy(s->s2->wact_data,buf,len);
 530 #ifdef PURIFY
 531         if (p)
 532                 memset(&(s->s2->wact_data[len]),0,p);
 533 #endif
 534
 535         if (!s->s2->clear_text)
 536                 {
 537                 s->s2->wact_data_length=len+p;
 538                 ssl2_mac(s,s->s2->mac_data,1);
 539                 s->s2->wlength+=p+mac_size;
 540                 ssl2_enc(s,1);
 541                 }
 542
 543         /* package up the header */
 544         s->s2->wpend_len=s->s2->wlength;
 545         if (s->s2->three_byte_header) /* 3 byte header */
 546                 {
 547                 pp=s->s2->mac_data;
 548                 pp-=3;
 549                 pp[0]=(s->s2->wlength>>8)&(THREE_BYTE_MASK>>8);
 550                 if (s->s2->escape) pp[0]|=SEC_ESC_BIT;
 551                 pp[1]=s->s2->wlength&0xff;
 552                 pp[2]=s->s2->padding;
 553                 s->s2->wpend_len+=3;
 554                 }
 555         else
 556                 {
 557                 pp=s->s2->mac_data;
 558                 pp-=2;
 559                 pp[0]=((s->s2->wlength>>8)&(TWO_BYTE_MASK>>8))|TWO_BYTE_BIT;
 560                 pp[1]=s->s2->wlength&0xff;
 561                 s->s2->wpend_len+=2;
 562                 }
 563         s->s2->write_ptr=pp;
 564
 565         INC32(s->s2->write_sequence); /* expect next number */
 566
 567         /* lets try to actually write the data */
 568         s->s2->wpend_tot=olen;
 569         s->s2->wpend_buf=buf;
 570
 571         s->s2->wpend_ret=len;
 572
 573         s->s2->wpend_off=0;
 574         return(write_pending(s,buf,olen));
 575         }
 576
 577 int ssl2_part_read(SSL *s, unsigned long f, int i)
 578         {
 579         unsigned char *p;
 580         int j;
 581
 582         /* check for error */
 583         if ((s->init_num == 0) && (i >= 3))
 584                 {
 585                 p=(unsigned char *)s->init_buf->data;
 586                 if (p[0] == SSL2_MT_ERROR)
 587                         {
 588                         j=(p[1]<<8)|p[2];
 589                         SSLerr((int)f,ssl_mt_error(j));
 590                         }
 591                 }
 592
 593         if (i < 0)
 594                 {
 595                 /* ssl2_return_error(s); */
 596                 /* for non-blocking io,
 597                  * this is not fatal */
 598                 return(i);
 599                 }
 600         else
 601                 {
 602                 s->init_num+=i;
 603                 return(0);
 604                 }
 605         }
 606
 607 int ssl2_do_write(SSL *s)
 608         {
 609         int ret;
 610
 611         ret=ssl2_write(s,&s->init_buf->data[s->init_off],s->init_num);
 612         if (ret == s->init_num)
 613                 return(1);
 614         if (ret < 0)
 615                 return(-1);
 616         s->init_off+=ret;
 617         s->init_num-=ret;
 618         return(0);
 619         }
 620
 621 static int ssl_mt_error(int n)
 622         {
 623         int ret;
 624
 625         switch (n)
 626                 {
 627         case SSL2_PE_NO_CIPHER:
 628                 ret=SSL_R_PEER_ERROR_NO_CIPHER;
 629                 break;
 630         case SSL2_PE_NO_CERTIFICATE:
 631                 ret=SSL_R_PEER_ERROR_NO_CERTIFICATE;
 632                 break;
 633         case SSL2_PE_BAD_CERTIFICATE:
 634                 ret=SSL_R_PEER_ERROR_CERTIFICATE;
 635                 break;
 636         case SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE:
 637                 ret=SSL_R_PEER_ERROR_UNSUPPORTED_CERTIFICATE_TYPE;
 638                 break;
 639         default:
 640                 ret=SSL_R_UNKNOWN_REMOTE_ERROR_TYPE;
 641                 break;
 642                 }
 643         return(ret);
 644         }
 645
 646 #endif