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diff --git a/src/lib/libcrypto/bio/bf_null.c b/src/lib/libcrypto/bio/bf_null.c
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1/* crypto/bio/bf_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 "bio.h"
63#include "evp.h"
64
65/* BIO_put and BIO_get both add to the digest,
66 * BIO_gets returns the digest */
67
68#ifndef NOPROTO
69static int nullf_write(BIO *h,char *buf,int num);
70static int nullf_read(BIO *h,char *buf,int size);
71static int nullf_puts(BIO *h,char *str);
72static int nullf_gets(BIO *h,char *str,int size);
73static long nullf_ctrl(BIO *h,int cmd,long arg1,char *arg2);
74static int nullf_new(BIO *h);
75static int nullf_free(BIO *data);
76#else
77static int nullf_write();
78static int nullf_read();
79static int nullf_puts();
80static int nullf_gets();
81static long nullf_ctrl();
82static int nullf_new();
83static int nullf_free();
84#endif
85
86static BIO_METHOD methods_nullf=
87 {
88 BIO_TYPE_NULL_FILTER,
89 "NULL filter",
90 nullf_write,
91 nullf_read,
92 nullf_puts,
93 nullf_gets,
94 nullf_ctrl,
95 nullf_new,
96 nullf_free,
97 };
98
99BIO_METHOD *BIO_f_null()
100 {
101 return(&methods_nullf);
102 }
103
104static int nullf_new(bi)
105BIO *bi;
106 {
107 bi->init=1;
108 bi->ptr=NULL;
109 bi->flags=0;
110 return(1);
111 }
112
113static int nullf_free(a)
114BIO *a;
115 {
116 if (a == NULL) return(0);
117/* a->ptr=NULL;
118 a->init=0;
119 a->flags=0;*/
120 return(1);
121 }
122
123static int nullf_read(b,out,outl)
124BIO *b;
125char *out;
126int outl;
127 {
128 int ret=0;
129
130 if (out == NULL) return(0);
131 if (b->next_bio == NULL) return(0);
132 ret=BIO_read(b->next_bio,out,outl);
133 BIO_clear_retry_flags(b);
134 BIO_copy_next_retry(b);
135 return(ret);
136 }
137
138static int nullf_write(b,in,inl)
139BIO *b;
140char *in;
141int inl;
142 {
143 int ret=0;
144
145 if ((in == NULL) || (inl <= 0)) return(0);
146 if (b->next_bio == NULL) return(0);
147 ret=BIO_write(b->next_bio,in,inl);
148 BIO_clear_retry_flags(b);
149 BIO_copy_next_retry(b);
150 return(ret);
151 }
152
153static long nullf_ctrl(b,cmd,num,ptr)
154BIO *b;
155int cmd;
156long num;
157char *ptr;
158 {
159 long ret;
160
161 if (b->next_bio == NULL) return(0);
162 switch(cmd)
163 {
164 case BIO_C_DO_STATE_MACHINE:
165 BIO_clear_retry_flags(b);
166 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
167 BIO_copy_next_retry(b);
168 break;
169 case BIO_CTRL_DUP:
170 ret=0L;
171 break;
172 default:
173 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
174 }
175 return(ret);
176 }
177
178static int nullf_gets(bp,buf,size)
179BIO *bp;
180char *buf;
181int size;
182 {
183 if (bp->next_bio == NULL) return(0);
184 return(BIO_gets(bp->next_bio,buf,size));
185 }
186
187
188static int nullf_puts(bp,str)
189BIO *bp;
190char *str;
191 {
192 if (bp->next_bio == NULL) return(0);
193 return(BIO_puts(bp->next_bio,str));
194 }
195
196
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