155714Skris/* crypto/bio/bf_null.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8280304Sjkim * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280304Sjkim * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22280304Sjkim * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37280304Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280304Sjkim * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52280304Sjkim * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include <errno.h> 6155714Skris#include "cryptlib.h" 6255714Skris#include <openssl/bio.h> 6355714Skris 64280304Sjkim/* 65280304Sjkim * BIO_put and BIO_get both add to the digest, BIO_gets returns the digest 66280304Sjkim */ 6755714Skris 6868651Skrisstatic int nullf_write(BIO *h, const char *buf, int num); 6968651Skrisstatic int nullf_read(BIO *h, char *buf, int size); 7068651Skrisstatic int nullf_puts(BIO *h, const char *str); 7168651Skrisstatic int nullf_gets(BIO *h, char *str, int size); 7268651Skrisstatic long nullf_ctrl(BIO *h, int cmd, long arg1, void *arg2); 7355714Skrisstatic int nullf_new(BIO *h); 7455714Skrisstatic int nullf_free(BIO *data); 7568651Skrisstatic long nullf_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); 76280304Sjkimstatic BIO_METHOD methods_nullf = { 77280304Sjkim BIO_TYPE_NULL_FILTER, 78280304Sjkim "NULL filter", 79280304Sjkim nullf_write, 80280304Sjkim nullf_read, 81280304Sjkim nullf_puts, 82280304Sjkim nullf_gets, 83280304Sjkim nullf_ctrl, 84280304Sjkim nullf_new, 85280304Sjkim nullf_free, 86280304Sjkim nullf_callback_ctrl, 87280304Sjkim}; 8855714Skris 8955714SkrisBIO_METHOD *BIO_f_null(void) 90280304Sjkim{ 91280304Sjkim return (&methods_nullf); 92280304Sjkim} 9355714Skris 9455714Skrisstatic int nullf_new(BIO *bi) 95280304Sjkim{ 96280304Sjkim bi->init = 1; 97280304Sjkim bi->ptr = NULL; 98280304Sjkim bi->flags = 0; 99280304Sjkim return (1); 100280304Sjkim} 10155714Skris 10255714Skrisstatic int nullf_free(BIO *a) 103280304Sjkim{ 104280304Sjkim if (a == NULL) 105280304Sjkim return (0); 106280304Sjkim /*- 107280304Sjkim a->ptr=NULL; 108280304Sjkim a->init=0; 109280304Sjkim a->flags=0; 110280304Sjkim */ 111280304Sjkim return (1); 112280304Sjkim} 113280304Sjkim 11455714Skrisstatic int nullf_read(BIO *b, char *out, int outl) 115280304Sjkim{ 116280304Sjkim int ret = 0; 11755714Skris 118280304Sjkim if (out == NULL) 119280304Sjkim return (0); 120280304Sjkim if (b->next_bio == NULL) 121280304Sjkim return (0); 122280304Sjkim ret = BIO_read(b->next_bio, out, outl); 123280304Sjkim BIO_clear_retry_flags(b); 124280304Sjkim BIO_copy_next_retry(b); 125280304Sjkim return (ret); 126280304Sjkim} 127280304Sjkim 12868651Skrisstatic int nullf_write(BIO *b, const char *in, int inl) 129280304Sjkim{ 130280304Sjkim int ret = 0; 13155714Skris 132280304Sjkim if ((in == NULL) || (inl <= 0)) 133280304Sjkim return (0); 134280304Sjkim if (b->next_bio == NULL) 135280304Sjkim return (0); 136280304Sjkim ret = BIO_write(b->next_bio, in, inl); 137280304Sjkim BIO_clear_retry_flags(b); 138280304Sjkim BIO_copy_next_retry(b); 139280304Sjkim return (ret); 140280304Sjkim} 14155714Skris 14268651Skrisstatic long nullf_ctrl(BIO *b, int cmd, long num, void *ptr) 143280304Sjkim{ 144280304Sjkim long ret; 14555714Skris 146280304Sjkim if (b->next_bio == NULL) 147280304Sjkim return (0); 148280304Sjkim switch (cmd) { 149280304Sjkim case BIO_C_DO_STATE_MACHINE: 150280304Sjkim BIO_clear_retry_flags(b); 151280304Sjkim ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 152280304Sjkim BIO_copy_next_retry(b); 153280304Sjkim break; 154280304Sjkim case BIO_CTRL_DUP: 155280304Sjkim ret = 0L; 156280304Sjkim break; 157280304Sjkim default: 158280304Sjkim ret = BIO_ctrl(b->next_bio, cmd, num, ptr); 159280304Sjkim } 160280304Sjkim return (ret); 161280304Sjkim} 16255714Skris 16368651Skrisstatic long nullf_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) 164280304Sjkim{ 165280304Sjkim long ret = 1; 16659191Skris 167280304Sjkim if (b->next_bio == NULL) 168280304Sjkim return (0); 169280304Sjkim switch (cmd) { 170280304Sjkim default: 171280304Sjkim ret = BIO_callback_ctrl(b->next_bio, cmd, fp); 172280304Sjkim break; 173280304Sjkim } 174280304Sjkim return (ret); 175280304Sjkim} 17659191Skris 17755714Skrisstatic int nullf_gets(BIO *bp, char *buf, int size) 178280304Sjkim{ 179280304Sjkim if (bp->next_bio == NULL) 180280304Sjkim return (0); 181280304Sjkim return (BIO_gets(bp->next_bio, buf, size)); 182280304Sjkim} 18355714Skris 18468651Skrisstatic int nullf_puts(BIO *bp, const char *str) 185280304Sjkim{ 186280304Sjkim if (bp->next_bio == NULL) 187280304Sjkim return (0); 188280304Sjkim return (BIO_puts(bp->next_bio, str)); 189280304Sjkim} 190