source: trunk/sys/libcrypto/bf_null.c @ 1

Last change on this file since 1 was 1, checked in by alain, 5 years ago

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