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