1*0Sstevel@tonic-gate /* crypto/bio/bf_null.c */
2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3*0Sstevel@tonic-gate * All rights reserved.
4*0Sstevel@tonic-gate *
5*0Sstevel@tonic-gate * This package is an SSL implementation written
6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com).
7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as
10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions
11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA,
12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms
14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15*0Sstevel@tonic-gate *
16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in
17*0Sstevel@tonic-gate * the code are not to be removed.
18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution
19*0Sstevel@tonic-gate * as the author of the parts of the library used.
20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or
21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package.
22*0Sstevel@tonic-gate *
23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions
25*0Sstevel@tonic-gate * are met:
26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright
27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software
32*0Sstevel@tonic-gate * must display the following acknowledgement:
33*0Sstevel@tonic-gate * "This product includes cryptographic software written by
34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)"
35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library
36*0Sstevel@tonic-gate * being used are not cryptographic related :-).
37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from
38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement:
39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40*0Sstevel@tonic-gate *
41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51*0Sstevel@tonic-gate * SUCH DAMAGE.
52*0Sstevel@tonic-gate *
53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or
54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be
55*0Sstevel@tonic-gate * copied and put under another distribution licence
56*0Sstevel@tonic-gate * [including the GNU Public Licence.]
57*0Sstevel@tonic-gate */
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate #include <stdio.h>
60*0Sstevel@tonic-gate #include <errno.h>
61*0Sstevel@tonic-gate #include "cryptlib.h"
62*0Sstevel@tonic-gate #include <openssl/bio.h>
63*0Sstevel@tonic-gate
64*0Sstevel@tonic-gate /* BIO_put and BIO_get both add to the digest,
65*0Sstevel@tonic-gate * BIO_gets returns the digest */
66*0Sstevel@tonic-gate
67*0Sstevel@tonic-gate static int nullf_write(BIO *h, const char *buf, int num);
68*0Sstevel@tonic-gate static int nullf_read(BIO *h, char *buf, int size);
69*0Sstevel@tonic-gate static int nullf_puts(BIO *h, const char *str);
70*0Sstevel@tonic-gate static int nullf_gets(BIO *h, char *str, int size);
71*0Sstevel@tonic-gate static long nullf_ctrl(BIO *h, int cmd, long arg1, void *arg2);
72*0Sstevel@tonic-gate static int nullf_new(BIO *h);
73*0Sstevel@tonic-gate static int nullf_free(BIO *data);
74*0Sstevel@tonic-gate static long nullf_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
75*0Sstevel@tonic-gate static BIO_METHOD methods_nullf=
76*0Sstevel@tonic-gate {
77*0Sstevel@tonic-gate BIO_TYPE_NULL_FILTER,
78*0Sstevel@tonic-gate "NULL filter",
79*0Sstevel@tonic-gate nullf_write,
80*0Sstevel@tonic-gate nullf_read,
81*0Sstevel@tonic-gate nullf_puts,
82*0Sstevel@tonic-gate nullf_gets,
83*0Sstevel@tonic-gate nullf_ctrl,
84*0Sstevel@tonic-gate nullf_new,
85*0Sstevel@tonic-gate nullf_free,
86*0Sstevel@tonic-gate nullf_callback_ctrl,
87*0Sstevel@tonic-gate };
88*0Sstevel@tonic-gate
BIO_f_null(void)89*0Sstevel@tonic-gate BIO_METHOD *BIO_f_null(void)
90*0Sstevel@tonic-gate {
91*0Sstevel@tonic-gate return(&methods_nullf);
92*0Sstevel@tonic-gate }
93*0Sstevel@tonic-gate
nullf_new(BIO * bi)94*0Sstevel@tonic-gate static int nullf_new(BIO *bi)
95*0Sstevel@tonic-gate {
96*0Sstevel@tonic-gate bi->init=1;
97*0Sstevel@tonic-gate bi->ptr=NULL;
98*0Sstevel@tonic-gate bi->flags=0;
99*0Sstevel@tonic-gate return(1);
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate
nullf_free(BIO * a)102*0Sstevel@tonic-gate static int nullf_free(BIO *a)
103*0Sstevel@tonic-gate {
104*0Sstevel@tonic-gate if (a == NULL) return(0);
105*0Sstevel@tonic-gate /* a->ptr=NULL;
106*0Sstevel@tonic-gate a->init=0;
107*0Sstevel@tonic-gate a->flags=0;*/
108*0Sstevel@tonic-gate return(1);
109*0Sstevel@tonic-gate }
110*0Sstevel@tonic-gate
nullf_read(BIO * b,char * out,int outl)111*0Sstevel@tonic-gate static int nullf_read(BIO *b, char *out, int outl)
112*0Sstevel@tonic-gate {
113*0Sstevel@tonic-gate int ret=0;
114*0Sstevel@tonic-gate
115*0Sstevel@tonic-gate if (out == NULL) return(0);
116*0Sstevel@tonic-gate if (b->next_bio == NULL) return(0);
117*0Sstevel@tonic-gate ret=BIO_read(b->next_bio,out,outl);
118*0Sstevel@tonic-gate BIO_clear_retry_flags(b);
119*0Sstevel@tonic-gate BIO_copy_next_retry(b);
120*0Sstevel@tonic-gate return(ret);
121*0Sstevel@tonic-gate }
122*0Sstevel@tonic-gate
nullf_write(BIO * b,const char * in,int inl)123*0Sstevel@tonic-gate static int nullf_write(BIO *b, const char *in, int inl)
124*0Sstevel@tonic-gate {
125*0Sstevel@tonic-gate int ret=0;
126*0Sstevel@tonic-gate
127*0Sstevel@tonic-gate if ((in == NULL) || (inl <= 0)) return(0);
128*0Sstevel@tonic-gate if (b->next_bio == NULL) return(0);
129*0Sstevel@tonic-gate ret=BIO_write(b->next_bio,in,inl);
130*0Sstevel@tonic-gate BIO_clear_retry_flags(b);
131*0Sstevel@tonic-gate BIO_copy_next_retry(b);
132*0Sstevel@tonic-gate return(ret);
133*0Sstevel@tonic-gate }
134*0Sstevel@tonic-gate
nullf_ctrl(BIO * b,int cmd,long num,void * ptr)135*0Sstevel@tonic-gate static long nullf_ctrl(BIO *b, int cmd, long num, void *ptr)
136*0Sstevel@tonic-gate {
137*0Sstevel@tonic-gate long ret;
138*0Sstevel@tonic-gate
139*0Sstevel@tonic-gate if (b->next_bio == NULL) return(0);
140*0Sstevel@tonic-gate switch(cmd)
141*0Sstevel@tonic-gate {
142*0Sstevel@tonic-gate case BIO_C_DO_STATE_MACHINE:
143*0Sstevel@tonic-gate BIO_clear_retry_flags(b);
144*0Sstevel@tonic-gate ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
145*0Sstevel@tonic-gate BIO_copy_next_retry(b);
146*0Sstevel@tonic-gate break;
147*0Sstevel@tonic-gate case BIO_CTRL_DUP:
148*0Sstevel@tonic-gate ret=0L;
149*0Sstevel@tonic-gate break;
150*0Sstevel@tonic-gate default:
151*0Sstevel@tonic-gate ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
152*0Sstevel@tonic-gate }
153*0Sstevel@tonic-gate return(ret);
154*0Sstevel@tonic-gate }
155*0Sstevel@tonic-gate
nullf_callback_ctrl(BIO * b,int cmd,bio_info_cb * fp)156*0Sstevel@tonic-gate static long nullf_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
157*0Sstevel@tonic-gate {
158*0Sstevel@tonic-gate long ret=1;
159*0Sstevel@tonic-gate
160*0Sstevel@tonic-gate if (b->next_bio == NULL) return(0);
161*0Sstevel@tonic-gate switch (cmd)
162*0Sstevel@tonic-gate {
163*0Sstevel@tonic-gate default:
164*0Sstevel@tonic-gate ret=BIO_callback_ctrl(b->next_bio,cmd,fp);
165*0Sstevel@tonic-gate break;
166*0Sstevel@tonic-gate }
167*0Sstevel@tonic-gate return(ret);
168*0Sstevel@tonic-gate }
169*0Sstevel@tonic-gate
nullf_gets(BIO * bp,char * buf,int size)170*0Sstevel@tonic-gate static int nullf_gets(BIO *bp, char *buf, int size)
171*0Sstevel@tonic-gate {
172*0Sstevel@tonic-gate if (bp->next_bio == NULL) return(0);
173*0Sstevel@tonic-gate return(BIO_gets(bp->next_bio,buf,size));
174*0Sstevel@tonic-gate }
175*0Sstevel@tonic-gate
176*0Sstevel@tonic-gate
nullf_puts(BIO * bp,const char * str)177*0Sstevel@tonic-gate static int nullf_puts(BIO *bp, const char *str)
178*0Sstevel@tonic-gate {
179*0Sstevel@tonic-gate if (bp->next_bio == NULL) return(0);
180*0Sstevel@tonic-gate return(BIO_puts(bp->next_bio,str));
181*0Sstevel@tonic-gate }
182*0Sstevel@tonic-gate
183*0Sstevel@tonic-gate
184