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