s23_pkt.c revision 59191 
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 <openssl/evp.h>
63#include <openssl/buffer.h>
64#include "ssl_locl.h"
65
66int 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 */
93int 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
118