Line data Source code
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 :
64 : static int null_write(BIO *h, const char *buf, int num);
65 : static int null_read(BIO *h, char *buf, int size);
66 : static int null_puts(BIO *h, const char *str);
67 : static int null_gets(BIO *h, char *str, int size);
68 : static long null_ctrl(BIO *h, int cmd, long arg1, void *arg2);
69 : static int null_new(BIO *h);
70 : static int null_free(BIO *data);
71 : static 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 :
84 0 : BIO_METHOD *BIO_s_null(void)
85 : {
86 0 : return (&null_method);
87 : }
88 :
89 0 : static int null_new(BIO *bi)
90 : {
91 0 : bi->init = 1;
92 0 : bi->num = 0;
93 0 : bi->ptr = (NULL);
94 0 : return (1);
95 : }
96 :
97 0 : static int null_free(BIO *a)
98 : {
99 0 : if (a == NULL)
100 : return (0);
101 0 : return (1);
102 : }
103 :
104 0 : static int null_read(BIO *b, char *out, int outl)
105 : {
106 0 : return (0);
107 : }
108 :
109 0 : static int null_write(BIO *b, const char *in, int inl)
110 : {
111 0 : return (inl);
112 : }
113 :
114 0 : static 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 0 : break;
135 : }
136 0 : return (ret);
137 : }
138 :
139 0 : static int null_gets(BIO *bp, char *buf, int size)
140 : {
141 0 : return (0);
142 : }
143 :
144 0 : static int null_puts(BIO *bp, const char *str)
145 : {
146 0 : if (str == NULL)
147 : return (0);
148 0 : return (strlen(str));
149 : }
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