Branch data 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 : : {
73 : : BIO_TYPE_NULL,
74 : : "NULL",
75 : : null_write,
76 : : null_read,
77 : : null_puts,
78 : : null_gets,
79 : : null_ctrl,
80 : : null_new,
81 : : null_free,
82 : : NULL,
83 : : };
84 : :
85 : 8 : BIO_METHOD *BIO_s_null(void)
86 : : {
87 : 8 : return(&null_method);
88 : : }
89 : :
90 : 8 : static int null_new(BIO *bi)
91 : : {
92 : 8 : bi->init=1;
93 : 8 : bi->num=0;
94 : 8 : bi->ptr=(NULL);
95 : 8 : return(1);
96 : : }
97 : :
98 : 8 : static int null_free(BIO *a)
99 : : {
100 [ + - ]: 8 : if (a == NULL) return(0);
101 : 8 : return(1);
102 : : }
103 : :
104 : 0 : static int null_read(BIO *b, char *out, int outl)
105 : : {
106 : 0 : return(0);
107 : : }
108 : :
109 : 8 : static int null_write(BIO *b, const char *in, int inl)
110 : : {
111 : 8 : return(inl);
112 : : }
113 : :
114 : 35 : static long null_ctrl(BIO *b, int cmd, long num, void *ptr)
115 : : {
116 [ + - ][ + + ]: 35 : long ret=1;
117 : :
118 : : switch (cmd)
119 : : {
120 : : case BIO_CTRL_RESET:
121 : : case BIO_CTRL_EOF:
122 : : case BIO_CTRL_SET:
123 : : case BIO_CTRL_SET_CLOSE:
124 : : case BIO_CTRL_FLUSH:
125 : : case BIO_CTRL_DUP:
126 : : ret=1;
127 : : break;
128 : : case BIO_CTRL_GET_CLOSE:
129 : : case BIO_CTRL_INFO:
130 : : case BIO_CTRL_GET:
131 : : case BIO_CTRL_PENDING:
132 : : case BIO_CTRL_WPENDING:
133 : : default:
134 : 21 : ret=0;
135 : 21 : break;
136 : : }
137 : 35 : return(ret);
138 : : }
139 : :
140 : 0 : static int null_gets(BIO *bp, char *buf, int size)
141 : : {
142 : 0 : return(0);
143 : : }
144 : :
145 : 0 : static int null_puts(BIO *bp, const char *str)
146 : : {
147 [ # # ]: 0 : if (str == NULL) return(0);
148 : 0 : return(strlen(str));
149 : : }
150 : :
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