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
  59 #include "ssl_locl.h"
  60 #ifndef NO_SSL2
  61 #include <stdio.h>
  62 #include <errno.h>
  63 #define USE_SOCKETS
  64
  65 static int read_n(SSL *s,unsigned int n,unsigned int max,unsigned int extend);
  66 static int do_ssl_write(SSL *s, const unsigned char *buf, unsigned int len);
  67 static int write_pending(SSL *s, const unsigned char *buf, unsigned int len);
  68 static int ssl_mt_error(int n);
  69 int ssl2_peek(SSL *s, char *buf, int len)
  70         {
  71 #if 1
  72         SSLerr(SSL_F_SSL2_PEEK, SSL_R_FIXME); /* function is totally broken */
  73         return -1;
  74 #else
  75         int ret;
  76
  77         ret=ssl2_read(s,buf,len);
  78         if (ret > 0)
  79                 {
  80                 s->s2->ract_data_length+=ret;
  81                 s->s2->ract_data-=ret;
  82                 }
  83         return(ret);
  84 #endif
  85         }
  86
  87 /* SSL_read -
  88  * This routine will return 0 to len bytes, decrypted etc if required.
  89  */
  90 int ssl2_read(SSL *s, void *buf, int len)
  91         {
  92         int n;
  93         unsigned char mac[MAX_MAC_SIZE];
  94         unsigned char *p;
  95         int i;
  96         unsigned int mac_size=0;
  97
  98 ssl2_read_again:
  99         if (SSL_in_init(s) && !s->in_handshake)
 100                 {
 101                 n=s->handshake_func(s);
 102                 if (n < 0) return(n);
 103                 if (n == 0)
 104                         {
 105                         SSLerr(SSL_F_SSL2_READ,SSL_R_SSL_HANDSHAKE_FAILURE);
 106                         return(-1);
 107                         }
 108                 }
 109
 110         clear_sys_error();
 111         s->rwstate=SSL_NOTHING;
 112         if (len <= 0) return(len);
 113
 114         if (s->s2->ract_data_length != 0) /* read from buffer */
 115                 {
 116                 if (len > s->s2->ract_data_length)
 117                         n=s->s2->ract_data_length;
 118                 else
 119                         n=len;
 120
 121                 memcpy(buf,s->s2->ract_data,(unsigned int)n);
 122                 s->s2->ract_data_length-=n;
 123                 s->s2->ract_data+=n;
 124                 if (s->s2->ract_data_length == 0)
 125                         s->rstate=SSL_ST_READ_HEADER;
 126                 return(n);
 127                 }
 128
 129         if (s->rstate == SSL_ST_READ_HEADER)
 130                 {
 131                 if (s->first_packet)
 132                         {
 133                         n=read_n(s,5,SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2,0);
 134                         if (n <= 0) return(n); /* error or non-blocking */
 135                         s->first_packet=0;
 136                         p=s->packet;
 137                         if (!((p[0] & 0x80) && (
 138                                 (p[2] == SSL2_MT_CLIENT_HELLO) ||
 139                                 (p[2] == SSL2_MT_SERVER_HELLO))))
 140                                 {
 141                                 SSLerr(SSL_F_SSL2_READ,SSL_R_NON_SSLV2_INITIAL_PACKET);
 142                                 return(-1);
 143                                 }
 144                         }
 145                 else
 146                         {
 147                         n=read_n(s,2,SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2,0);
 148                         if (n <= 0) return(n); /* error or non-blocking */
 149                         }
 150                 /* part read stuff */
 151
 152                 s->rstate=SSL_ST_READ_BODY;
 153                 p=s->packet;
 154                 /* Do header */
 155                 /*s->s2->padding=0;*/
 156                 s->s2->escape=0;
 157                 s->s2->rlength=(((unsigned int)p[0])<<8)|((unsigned int)p[1]);
 158                 if ((p[0] & TWO_BYTE_BIT))              /* Two byte header? */
 159                         {
 160                         s->s2->three_byte_header=0;
 161                         s->s2->rlength&=TWO_BYTE_MASK;
 162                         }
 163                 else
 164                         {
 165                         s->s2->three_byte_header=1;
 166                         s->s2->rlength&=THREE_BYTE_MASK;
 167
 168                         /* security >s2->escape */
 169                         s->s2->escape=((p[0] & SEC_ESC_BIT))?1:0;
 170                         }
 171                 }
 172
 173         if (s->rstate == SSL_ST_READ_BODY)
 174                 {
 175                 n=s->s2->rlength+2+s->s2->three_byte_header;
 176                 if (n > (int)s->packet_length)
 177                         {
 178                         n-=s->packet_length;
 179                         i=read_n(s,(unsigned int)n,(unsigned int)n,1);
 180                         if (i <= 0) return(i); /* ERROR */
 181                         }
 182
 183                 p= &(s->packet[2]);
 184                 s->rstate=SSL_ST_READ_HEADER;
 185                 if (s->s2->three_byte_header)
 186                         s->s2->padding= *(p++);
 187                 else    s->s2->padding=0;
 188
 189                 /* Data portion */
 190                 if (s->s2->clear_text)
 191                         {
 192                         s->s2->mac_data=p;
 193                         s->s2->ract_data=p;
 194                         s->s2->pad_data=NULL;
 195                         }
 196                 else
 197                         {
 198                         mac_size=EVP_MD_size(s->read_hash);
 199                         s->s2->mac_data=p;
 200                         s->s2->ract_data= &p[mac_size];
 201                         s->s2->pad_data= &p[mac_size+
 202                                 s->s2->rlength-s->s2->padding];
 203                         }
 204
 205                 s->s2->ract_data_length=s->s2->rlength;
 206                 /* added a check for length > max_size in case
 207                  * encryption was not turned on yet due to an error */
 208                 if ((!s->s2->clear_text) &&
 209                         (s->s2->rlength >= mac_size))
 210                         {
 211                         ssl2_enc(s,0);
 212                         s->s2->ract_data_length-=mac_size;
 213                         ssl2_mac(s,mac,0);
 214                         s->s2->ract_data_length-=s->s2->padding;
 215                         if (    (memcmp(mac,s->s2->mac_data,
 216                                 (unsigned int)mac_size) != 0) ||
 217                                 (s->s2->rlength%EVP_CIPHER_CTX_block_size(s->enc_read_ctx) != 0))
 218                                 {
 219                                 SSLerr(SSL_F_SSL2_READ,SSL_R_BAD_MAC_DECODE);
 220                                 return(-1);
 221                                 }
 222                         }
 223                 INC32(s->s2->read_sequence); /* expect next number */
 224                 /* s->s2->ract_data is now available for processing */
 225
 226 #if 1
 227                 /* How should we react when a packet containing 0
 228                  * bytes is received?  (Note that SSLeay/OpenSSL itself
 229                  * never sends such packets; see ssl2_write.)
 230                  * Returning 0 would be interpreted by the caller as
 231                  * indicating EOF, so it's not a good idea.
 232                  * Instead, we just continue reading.  Note that using
 233                  * select() for blocking sockets *never* guarantees
 234                  * that the next SSL_read will not block -- the available
 235                  * data may contain incomplete packets, and except for SSL 2
 236                  * renegotiation can confuse things even more. */
 237
 238                 goto ssl2_read_again; /* This should really be
 239                                        * "return ssl2_read(s,buf,len)",
 240                                        * but that would allow for
 241                                        * denial-of-service attacks if a
 242                                        * C compiler is used that does not
 243                                        * recognize end-recursion. */
 244 #else
 245                 /* If a 0 byte packet was sent, return 0, otherwise
 246                  * we play havoc with people using select with
 247                  * blocking sockets.  Let them handle a packet at a time,
 248                  * they should really be using non-blocking sockets. */
 249                 if (s->s2->ract_data_length == 0)
 250                         return(0);
 251                 return(ssl2_read(s,buf,len));
 252 #endif
 253                 }
 254         else
 255                 {
 256                 SSLerr(SSL_F_SSL2_READ,SSL_R_BAD_STATE);
 257                         return(-1);
 258                 }
 259         }
 260
 261 static int read_n(SSL *s, unsigned int n, unsigned int max,
 262              unsigned int extend)
 263         {
 264         int i,off,newb;
 265
 266         /* if there is stuff still in the buffer from a previous read,
 267          * and there is more than we want, take some. */
 268         if (s->s2->rbuf_left >= (int)n)
 269                 {
 270                 if (extend)
 271                         s->packet_length+=n;
 272                 else
 273                         {
 274                         s->packet= &(s->s2->rbuf[s->s2->rbuf_offs]);
 275                         s->packet_length=n;
 276                         }
 277                 s->s2->rbuf_left-=n;
 278                 s->s2->rbuf_offs+=n;
 279                 return(n);
 280                 }
 281
 282         if (!s->read_ahead) max=n;
 283         if (max > (unsigned int)(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2))
 284                 max=SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2;
 285
 286
 287         /* Else we want more than we have.
 288          * First, if there is some left or we want to extend */
 289         off=0;
 290         if ((s->s2->rbuf_left != 0) || ((s->packet_length != 0) && extend))
 291                 {
 292                 newb=s->s2->rbuf_left;
 293                 if (extend)
 294                         {
 295                         off=s->packet_length;
 296                         if (s->packet != s->s2->rbuf)
 297                                 memcpy(s->s2->rbuf,s->packet,
 298                                         (unsigned int)newb+off);
 299                         }
 300                 else if (s->s2->rbuf_offs != 0)
 301                         {
 302                         memcpy(s->s2->rbuf,&(s->s2->rbuf[s->s2->rbuf_offs]),
 303                                 (unsigned int)newb);
 304                         s->s2->rbuf_offs=0;
 305                         }
 306                 s->s2->rbuf_left=0;
 307                 }
 308         else
 309                 newb=0;
 310
 311         /* off is the offset to start writing too.
 312          * r->s2->rbuf_offs is the 'unread data', now 0.
 313          * newb is the number of new bytes so far
 314          */
 315         s->packet=s->s2->rbuf;
 316         while (newb < (int)n)
 317                 {
 318                 clear_sys_error();
 319                 if (s->rbio != NULL)
 320                         {
 321                         s->rwstate=SSL_READING;
 322                         i=BIO_read(s->rbio,(char *)&(s->s2->rbuf[off+newb]),
 323                                 max-newb);
 324                         }
 325                 else
 326                         {
 327                         SSLerr(SSL_F_READ_N,SSL_R_READ_BIO_NOT_SET);
 328                         i= -1;
 329                         }
 330 #ifdef PKT_DEBUG
 331                 if (s->debug & 0x01) sleep(1);
 332 #endif
 333                 if (i <= 0)
 334                         {
 335                         s->s2->rbuf_left+=newb;
 336                         return(i);
 337                         }
 338                 newb+=i;
 339                 }
 340
 341         /* record unread data */
 342         if (newb > (int)n)
 343                 {
 344                 s->s2->rbuf_offs=n+off;
 345                 s->s2->rbuf_left=newb-n;
 346                 }
 347         else
 348                 {
 349                 s->s2->rbuf_offs=0;
 350                 s->s2->rbuf_left=0;
 351                 }
 352         if (extend)
 353                 s->packet_length+=n;
 354         else
 355                 s->packet_length=n;
 356         s->rwstate=SSL_NOTHING;
 357         return(n);
 358         }
 359
 360 int ssl2_write(SSL *s, const void *_buf, int len)
 361         {
 362         const unsigned char *buf=_buf;
 363         unsigned int n,tot;
 364         int i;
 365
 366         if (SSL_in_init(s) && !s->in_handshake)
 367                 {
 368                 i=s->handshake_func(s);
 369                 if (i < 0) return(i);
 370                 if (i == 0)
 371                         {
 372                         SSLerr(SSL_F_SSL2_WRITE,SSL_R_SSL_HANDSHAKE_FAILURE);
 373                         return(-1);
 374                         }
 375                 }
 376
 377         if (s->error)
 378                 {
 379                 ssl2_write_error(s);
 380                 if (s->error)
 381                         return(-1);
 382                 }
 383
 384         clear_sys_error();
 385         s->rwstate=SSL_NOTHING;
 386         if (len <= 0) return(len);
 387
 388         tot=s->s2->wnum;
 389         s->s2->wnum=0;
 390
 391         n=(len-tot);
 392         for (;;)
 393                 {
 394                 i=do_ssl_write(s,&(buf[tot]),n);
 395                 if (i <= 0)
 396                         {
 397                         s->s2->wnum=tot;
 398                         return(i);
 399                         }
 400                 if ((i == (int)n) ||
 401                         (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))
 402                         {
 403                         return(tot+i);
 404                         }
 405
 406                 n-=i;
 407                 tot+=i;
 408                 }
 409         }
 410
 411 static int write_pending(SSL *s, const unsigned char *buf, unsigned int len)
 412         {
 413         int i;
 414
 415         /* s->s2->wpend_len != 0 MUST be true. */
 416
 417         /* check that they have given us the same buffer to
 418          * write */
 419         if ((s->s2->wpend_tot > (int)len) ||
 420                 ((s->s2->wpend_buf != buf) &&
 421                  !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)))
 422                 {
 423                 SSLerr(SSL_F_WRITE_PENDING,SSL_R_BAD_WRITE_RETRY);
 424                 return(-1);
 425                 }
 426
 427         for (;;)
 428                 {
 429                 clear_sys_error();
 430                 if (s->wbio != NULL)
 431                         {
 432                         s->rwstate=SSL_WRITING;
 433                         i=BIO_write(s->wbio,
 434                                 (char *)&(s->s2->write_ptr[s->s2->wpend_off]),
 435                                 (unsigned int)s->s2->wpend_len);
 436                         }
 437                 else
 438                         {
 439                         SSLerr(SSL_F_WRITE_PENDING,SSL_R_WRITE_BIO_NOT_SET);
 440                         i= -1;
 441                         }
 442 #ifdef PKT_DEBUG
 443                 if (s->debug & 0x01) sleep(1);
 444 #endif
 445                 if (i == s->s2->wpend_len)
 446                         {
 447                         s->s2->wpend_len=0;
 448                         s->rwstate=SSL_NOTHING;
 449                         return(s->s2->wpend_ret);
 450                         }
 451                 else if (i <= 0)
 452                         return(i);
 453                 s->s2->wpend_off+=i;
 454                 s->s2->wpend_len-=i;
 455                 }
 456         }
 457
 458 static int do_ssl_write(SSL *s, const unsigned char *buf, unsigned int len)
 459         {
 460         unsigned int j,k,olen,p,mac_size,bs;
 461         register unsigned char *pp;
 462
 463         olen=len;
 464
 465         /* first check if there is data from an encryption waiting to
 466          * be sent - it must be sent because the other end is waiting.
 467          * This will happen with non-blocking IO.  We print it and then
 468          * return.
 469          */
 470         if (s->s2->wpend_len != 0) return(write_pending(s,buf,len));
 471
 472         /* set mac_size to mac size */
 473         if (s->s2->clear_text)
 474                 mac_size=0;
 475         else
 476                 mac_size=EVP_MD_size(s->write_hash);
 477
 478         /* lets set the pad p */
 479         if (s->s2->clear_text)
 480                 {
 481                 if (len > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER)
 482                         len=SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER;
 483                 p=0;
 484                 s->s2->three_byte_header=0;
 485                 /* len=len; */
 486                 }
 487         else
 488                 {
 489                 bs=EVP_CIPHER_CTX_block_size(s->enc_read_ctx);
 490                 j=len+mac_size;
 491                 if ((j > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) &&
 492                         (!s->s2->escape))
 493                         {
 494                         if (j > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER)
 495                                 j=SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER;
 496                         /* set k to the max number of bytes with 2
 497                          * byte header */
 498                         k=j-(j%bs);
 499                         /* how many data bytes? */
 500                         len=k-mac_size;
 501                         s->s2->three_byte_header=0;
 502                         p=0;
 503                         }
 504                 else if ((bs <= 1) && (!s->s2->escape))
 505                         {
 506                         /* len=len; */
 507                         s->s2->three_byte_header=0;
 508                         p=0;
 509                         }
 510                 else /* 3 byte header */
 511                         {
 512                         /*len=len; */
 513                         p=(j%bs);
 514                         p=(p == 0)?0:(bs-p);
 515                         if (s->s2->escape)
 516                                 s->s2->three_byte_header=1;
 517                         else
 518                                 s->s2->three_byte_header=(p == 0)?0:1;
 519                         }
 520                 }
 521         /* mac_size is the number of MAC bytes
 522          * len is the number of data bytes we are going to send
 523          * p is the number of padding bytes
 524          * if p == 0, it is a 2 byte header */
 525
 526         s->s2->wlength=len;
 527         s->s2->padding=p;
 528         s->s2->mac_data= &(s->s2->wbuf[3]);
 529         s->s2->wact_data= &(s->s2->wbuf[3+mac_size]);
 530         /* we copy the data into s->s2->wbuf */
 531         memcpy(s->s2->wact_data,buf,len);
 532 #ifdef PURIFY
 533         if (p)
 534                 memset(&(s->s2->wact_data[len]),0,p);
 535 #endif
 536
 537         if (!s->s2->clear_text)
 538                 {
 539                 s->s2->wact_data_length=len+p;
 540                 ssl2_mac(s,s->s2->mac_data,1);
 541                 s->s2->wlength+=p+mac_size;
 542                 ssl2_enc(s,1);
 543                 }
 544
 545         /* package up the header */
 546         s->s2->wpend_len=s->s2->wlength;
 547         if (s->s2->three_byte_header) /* 3 byte header */
 548                 {
 549                 pp=s->s2->mac_data;
 550                 pp-=3;
 551                 pp[0]=(s->s2->wlength>>8)&(THREE_BYTE_MASK>>8);
 552                 if (s->s2->escape) pp[0]|=SEC_ESC_BIT;
 553                 pp[1]=s->s2->wlength&0xff;
 554                 pp[2]=s->s2->padding;
 555                 s->s2->wpend_len+=3;
 556                 }
 557         else
 558                 {
 559                 pp=s->s2->mac_data;
 560                 pp-=2;
 561                 pp[0]=((s->s2->wlength>>8)&(TWO_BYTE_MASK>>8))|TWO_BYTE_BIT;
 562                 pp[1]=s->s2->wlength&0xff;
 563                 s->s2->wpend_len+=2;
 564                 }
 565         s->s2->write_ptr=pp;
 566
 567         INC32(s->s2->write_sequence); /* expect next number */
 568
 569         /* lets try to actually write the data */
 570         s->s2->wpend_tot=olen;
 571         s->s2->wpend_buf=buf;
 572
 573         s->s2->wpend_ret=len;
 574
 575         s->s2->wpend_off=0;
 576         return(write_pending(s,buf,olen));
 577         }
 578
 579 int ssl2_part_read(SSL *s, unsigned long f, int i)
 580         {
 581         unsigned char *p;
 582         int j;
 583
 584         /* check for error */
 585         if ((s->init_num == 0) && (i >= 3))
 586                 {
 587                 p=(unsigned char *)s->init_buf->data;
 588                 if (p[0] == SSL2_MT_ERROR)
 589                         {
 590                         j=(p[1]<<8)|p[2];
 591                         SSLerr((int)f,ssl_mt_error(j));
 592                         }
 593                 }
 594
 595         if (i < 0)
 596                 {
 597                 /* ssl2_return_error(s); */
 598                 /* for non-blocking io,
 599                  * this is not fatal */
 600                 return(i);
 601                 }
 602         else
 603                 {
 604                 s->init_num+=i;
 605                 return(0);
 606                 }
 607         }
 608
 609 int ssl2_do_write(SSL *s)
 610         {
 611         int ret;
 612
 613         ret=ssl2_write(s,&s->init_buf->data[s->init_off],s->init_num);
 614         if (ret == s->init_num)
 615                 return(1);
 616         if (ret < 0)
 617                 return(-1);
 618         s->init_off+=ret;
 619         s->init_num-=ret;
 620         return(0);
 621         }
 622
 623 static int ssl_mt_error(int n)
 624         {
 625         int ret;
 626
 627         switch (n)
 628                 {
 629         case SSL2_PE_NO_CIPHER:
 630                 ret=SSL_R_PEER_ERROR_NO_CIPHER;
 631                 break;
 632         case SSL2_PE_NO_CERTIFICATE:
 633                 ret=SSL_R_PEER_ERROR_NO_CERTIFICATE;
 634                 break;
 635         case SSL2_PE_BAD_CERTIFICATE:
 636                 ret=SSL_R_PEER_ERROR_CERTIFICATE;
 637                 break;
 638         case SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE:
 639                 ret=SSL_R_PEER_ERROR_UNSUPPORTED_CERTIFICATE_TYPE;
 640                 break;
 641         default:
 642                 ret=SSL_R_UNKNOWN_REMOTE_ERROR_TYPE;
 643                 break;
 644                 }
 645         return(ret);
 646         }
 647 #else /* !NO_SSL2 */
 648
 649 # if PEDANTIC
 650 static void *dummy=&dummy;
 651 # endif
 652
 653 #endif