1: /* ssl/s23_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 <stdio.h>
   60: #include <errno.h>
   61: #define USE_SOCKETS
   62: #include "ssl_locl.h"
   63: #include <openssl/evp.h>
   64: #include <openssl/buffer.h>
   65: 
   66: int ssl23_write_bytes(SSL *s)
   67:         {
   68:         int i,num,tot;
   69:         char *buf;
   70: 
   71:         buf=s->init_buf->data;
   72:         tot=s->init_off;
   73:         num=s->init_num;
   74:         for (;;)
   75:                 {
   76:                 s->rwstate=SSL_WRITING;
   77:                 i=BIO_write(s->wbio,&(buf[tot]),num);
   78:                 if (i <= 0)
   79:                         {
   80:                         s->init_off=tot;
   81:                         s->init_num=num;
   82:                         return(i);
   83:                         }
   84:                 s->rwstate=SSL_NOTHING;
   85:                 if (i == num) return(tot+i);
   86: 
   87:                 num-=i;
   88:                 tot+=i;
   89:                 }
   90:         }
   91: 
   92: /* return regularly only when we have read (at least) 'n' bytes */
   93: int ssl23_read_bytes(SSL *s, int n)
   94:         {
   95:         unsigned char *p;
   96:         int j;
   97: 
   98:         if (s->packet_length < (unsigned int)n)
   99:                 {
  100:                 p=s->packet;
  101: 
  102:                 for (;;)
  103:                         {
  104:                         s->rwstate=SSL_READING;
  105:                         j=BIO_read(s->rbio,(char *)&(p[s->packet_length]),
  106:                                 n-s->packet_length);
  107:                         if (j <= 0)
  108:                                 return(j);
  109:                         s->rwstate=SSL_NOTHING;
  110:                         s->packet_length+=j;
  111:                         if (s->packet_length >= (unsigned int)n)
  112:                                 return(s->packet_length);
  113:                         }
  114:                 }
  115:         return(n);
  116:         }
  117: