bss_null.c revision 280304
1/* crypto/bio/bss_null.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#include "cryptlib.h" 62#include <openssl/bio.h> 63 64static int null_write(BIO *h, const char *buf, int num); 65static int null_read(BIO *h, char *buf, int size); 66static int null_puts(BIO *h, const char *str); 67static int null_gets(BIO *h, char *str, int size); 68static long null_ctrl(BIO *h, int cmd, long arg1, void *arg2); 69static int null_new(BIO *h); 70static int null_free(BIO *data); 71static BIO_METHOD null_method = { 72 BIO_TYPE_NULL, 73 "NULL", 74 null_write, 75 null_read, 76 null_puts, 77 null_gets, 78 null_ctrl, 79 null_new, 80 null_free, 81 NULL, 82}; 83 84BIO_METHOD *BIO_s_null(void) 85{ 86 return (&null_method); 87} 88 89static int null_new(BIO *bi) 90{ 91 bi->init = 1; 92 bi->num = 0; 93 bi->ptr = (NULL); 94 return (1); 95} 96 97static int null_free(BIO *a) 98{ 99 if (a == NULL) 100 return (0); 101 return (1); 102} 103 104static int null_read(BIO *b, char *out, int outl) 105{ 106 return (0); 107} 108 109static int null_write(BIO *b, const char *in, int inl) 110{ 111 return (inl); 112} 113 114static long null_ctrl(BIO *b, int cmd, long num, void *ptr) 115{ 116 long ret = 1; 117 118 switch (cmd) { 119 case BIO_CTRL_RESET: 120 case BIO_CTRL_EOF: 121 case BIO_CTRL_SET: 122 case BIO_CTRL_SET_CLOSE: 123 case BIO_CTRL_FLUSH: 124 case BIO_CTRL_DUP: 125 ret = 1; 126 break; 127 case BIO_CTRL_GET_CLOSE: 128 case BIO_CTRL_INFO: 129 case BIO_CTRL_GET: 130 case BIO_CTRL_PENDING: 131 case BIO_CTRL_WPENDING: 132 default: 133 ret = 0; 134 break; 135 } 136 return (ret); 137} 138 139static int null_gets(BIO *bp, char *buf, int size) 140{ 141 return (0); 142} 143 144static int null_puts(BIO *bp, const char *str) 145{ 146 if (str == NULL) 147 return (0); 148 return (strlen(str)); 149} 150