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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 "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 | |
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); | |
75 static 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 | |
89 BIO_METHOD *BIO_f_null(void) | |
90 { | |
91 return(&methods_nullf); | |
92 } | |
93 | |
94 static int nullf_new(BIO *bi) | |
95 { | |
96 bi->init=1; | |
97 bi->ptr=NULL; | |
98 bi->flags=0; | |
99 return(1); | |
100 } | |
101 | |
102 static 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 | |
111 static 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 | |
123 static 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 | |
135 static 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 | |
156 static 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 | |
170 static 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 | |
177 static 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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