1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay@cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay@cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] */ 56 57#include <stdio.h> 58#include <errno.h> 59 60#include <openssl/buf.h> 61#include <openssl/evp.h> 62 63#include "ssl_locl.h" 64 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