1 /* ssl/s23_pkt.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 } 117 118
