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bf_null.c

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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)-
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 <errno.h>-
60#include <stdio.h>-
61-
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);-
75-
76static const BIO_METHOD methods_nullf = {-
77 .type = BIO_TYPE_NULL_FILTER,-
78 .name = "NULL filter",-
79 .bwrite = nullf_write,-
80 .bread = nullf_read,-
81 .bputs = nullf_puts,-
82 .bgets = nullf_gets,-
83 .ctrl = nullf_ctrl,-
84 .create = nullf_new,-
85 .destroy = nullf_free,-
86 .callback_ctrl = nullf_callback_ctrl-
87};-
88-
89const BIO_METHOD *-
90BIO_f_null(void)-
91{-
92 return (&methods_nullf);
never executed: return (&methods_nullf);
0
93}-
94-
95static int-
96nullf_new(BIO *bi)-
97{-
98 bi->init = 1;-
99 bi->ptr = NULL;-
100 bi->flags = 0;-
101 return (1);
never executed: return (1);
0
102}-
103-
104static int-
105nullf_free(BIO *a)-
106{-
107 if (a == NULL)
a == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
108 return (0);
never executed: return (0);
0
109/* a->ptr=NULL;-
110 a->init=0;-
111 a->flags=0;*/-
112 return (1);
never executed: return (1);
0
113}-
114-
115static int-
116nullf_read(BIO *b, char *out, int outl)-
117{-
118 int ret = 0;-
119-
120 if (out == NULL)
out == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
121 return (0);
never executed: return (0);
0
122 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
123 return (0);
never executed: return (0);
0
124 ret = BIO_read(b->next_bio, out, outl);-
125 BIO_clear_retry_flags(b);-
126 BIO_copy_next_retry(b);-
127 return (ret);
never executed: return (ret);
0
128}-
129-
130static int-
131nullf_write(BIO *b, const char *in, int inl)-
132{-
133 int ret = 0;-
134-
135 if ((in == NULL) || (inl <= 0))
(in == ((void *)0) )Description
TRUEnever evaluated
FALSEnever evaluated
(inl <= 0)Description
TRUEnever evaluated
FALSEnever evaluated
0
136 return (0);
never executed: return (0);
0
137 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
138 return (0);
never executed: return (0);
0
139 ret = BIO_write(b->next_bio, in, inl);-
140 BIO_clear_retry_flags(b);-
141 BIO_copy_next_retry(b);-
142 return (ret);
never executed: return (ret);
0
143}-
144-
145static long-
146nullf_ctrl(BIO *b, int cmd, long num, void *ptr)-
147{-
148 long ret;-
149-
150 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
151 return (0);
never executed: return (0);
0
152 switch (cmd) {-
153 case BIO_C_DO_STATE_MACHINE:
never executed: case 101:
0
154 BIO_clear_retry_flags(b);-
155 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);-
156 BIO_copy_next_retry(b);-
157 break;
never executed: break;
0
158 case BIO_CTRL_DUP:
never executed: case 12:
0
159 ret = 0L;-
160 break;
never executed: break;
0
161 default:
never executed: default:
0
162 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);-
163 }
never executed: end of block
0
164 return (ret);
never executed: return (ret);
0
165}-
166-
167static long-
168nullf_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)-
169{-
170 long ret = 1;-
171-
172 if (b->next_bio == NULL)
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
173 return (0);
never executed: return (0);
0
174 switch (cmd) {-
175 default:
never executed: default:
0
176 ret = BIO_callback_ctrl(b->next_bio, cmd, fp);-
177 break;
never executed: break;
0
178 }-
179 return (ret);
never executed: return (ret);
0
180}-
181-
182static int-
183nullf_gets(BIO *bp, char *buf, int size)-
184{-
185 if (bp->next_bio == NULL)
bp->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
186 return (0);
never executed: return (0);
0
187 return (BIO_gets(bp->next_bio, buf, size));
never executed: return (BIO_gets(bp->next_bio, buf, size));
0
188}-
189-
190static int-
191nullf_puts(BIO *bp, const char *str)-
192{-
193 if (bp->next_bio == NULL)
bp->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
194 return (0);
never executed: return (0);
0
195 return (BIO_puts(bp->next_bio, str));
never executed: return (BIO_puts(bp->next_bio, str));
0
196}-
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