1 /* $OpenBSD: bf_null.c,v 1.12 2018/05/01 13:29:09 tb Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
62 #include <openssl/bio.h>
64 /* BIO_put and BIO_get both add to the digest,
65 * BIO_gets returns the digest */
67 static int nullf_write(BIO
*h
, const char *buf
, int num
);
68 static int nullf_read(BIO
*h
, char *buf
, int size
);
69 static int nullf_puts(BIO
*h
, const char *str
);
70 static int nullf_gets(BIO
*h
, char *str
, int size
);
71 static long nullf_ctrl(BIO
*h
, int cmd
, long arg1
, void *arg2
);
72 static int nullf_new(BIO
*h
);
73 static int nullf_free(BIO
*data
);
74 static long nullf_callback_ctrl(BIO
*h
, int cmd
, bio_info_cb
*fp
);
76 static const BIO_METHOD methods_nullf
= {
77 .type
= BIO_TYPE_NULL_FILTER
,
78 .name
= "NULL filter",
79 .bwrite
= nullf_write
,
85 .destroy
= nullf_free
,
86 .callback_ctrl
= nullf_callback_ctrl
92 return (&methods_nullf
);
116 nullf_read(BIO
*b
, char *out
, int outl
)
122 if (b
->next_bio
== NULL
)
124 ret
= BIO_read(b
->next_bio
, out
, outl
);
125 BIO_clear_retry_flags(b
);
126 BIO_copy_next_retry(b
);
131 nullf_write(BIO
*b
, const char *in
, int inl
)
135 if ((in
== NULL
) || (inl
<= 0))
137 if (b
->next_bio
== NULL
)
139 ret
= BIO_write(b
->next_bio
, in
, inl
);
140 BIO_clear_retry_flags(b
);
141 BIO_copy_next_retry(b
);
146 nullf_ctrl(BIO
*b
, int cmd
, long num
, void *ptr
)
150 if (b
->next_bio
== NULL
)
153 case BIO_C_DO_STATE_MACHINE
:
154 BIO_clear_retry_flags(b
);
155 ret
= BIO_ctrl(b
->next_bio
, cmd
, num
, ptr
);
156 BIO_copy_next_retry(b
);
162 ret
= BIO_ctrl(b
->next_bio
, cmd
, num
, ptr
);
168 nullf_callback_ctrl(BIO
*b
, int cmd
, bio_info_cb
*fp
)
172 if (b
->next_bio
== NULL
)
176 ret
= BIO_callback_ctrl(b
->next_bio
, cmd
, fp
);
183 nullf_gets(BIO
*bp
, char *buf
, int size
)
185 if (bp
->next_bio
== NULL
)
187 return (BIO_gets(bp
->next_bio
, buf
, size
));
191 nullf_puts(BIO
*bp
, const char *str
)
193 if (bp
->next_bio
== NULL
)
195 return (BIO_puts(bp
->next_bio
, str
));