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diff --git a/src/lib/libcrypto/bio/bf_nbio.c b/src/lib/libcrypto/bio/bf_nbio.c
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1/* crypto/bio/bf_nbio.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/rand.h>
63#include <openssl/bio.h>
64#include <openssl/evp.h>
65
66/* BIO_put and BIO_get both add to the digest,
67 * BIO_gets returns the digest */
68
69static int nbiof_write(BIO *h,char *buf,int num);
70static int nbiof_read(BIO *h,char *buf,int size);
71static int nbiof_puts(BIO *h,char *str);
72static int nbiof_gets(BIO *h,char *str,int size);
73static long nbiof_ctrl(BIO *h,int cmd,long arg1,char *arg2);
74static int nbiof_new(BIO *h);
75static int nbiof_free(BIO *data);
76typedef struct nbio_test_st
77 {
78 /* only set if we sent a 'should retry' error */
79 int lrn;
80 int lwn;
81 } NBIO_TEST;
82
83static BIO_METHOD methods_nbiof=
84 {
85 BIO_TYPE_NBIO_TEST,
86 "non-blocking IO test filter",
87 nbiof_write,
88 nbiof_read,
89 nbiof_puts,
90 nbiof_gets,
91 nbiof_ctrl,
92 nbiof_new,
93 nbiof_free,
94 };
95
96BIO_METHOD *BIO_f_nbio_test(void)
97 {
98 return(&methods_nbiof);
99 }
100
101static int nbiof_new(BIO *bi)
102 {
103 NBIO_TEST *nt;
104
105 nt=(NBIO_TEST *)Malloc(sizeof(NBIO_TEST));
106 nt->lrn= -1;
107 nt->lwn= -1;
108 bi->ptr=(char *)nt;
109 bi->init=1;
110 bi->flags=0;
111 return(1);
112 }
113
114static int nbiof_free(BIO *a)
115 {
116 if (a == NULL) return(0);
117 if (a->ptr != NULL)
118 Free(a->ptr);
119 a->ptr=NULL;
120 a->init=0;
121 a->flags=0;
122 return(1);
123 }
124
125static int nbiof_read(BIO *b, char *out, int outl)
126 {
127 NBIO_TEST *nt;
128 int ret=0;
129#if 0
130 int num;
131 unsigned char n;
132#endif
133
134 if (out == NULL) return(0);
135 if (b->next_bio == NULL) return(0);
136 nt=(NBIO_TEST *)b->ptr;
137
138 BIO_clear_retry_flags(b);
139#if 0
140 RAND_bytes(&n,1);
141 num=(n&0x07);
142
143 if (outl > num) outl=num;
144
145 if (num == 0)
146 {
147 ret= -1;
148 BIO_set_retry_read(b);
149 }
150 else
151#endif
152 {
153 ret=BIO_read(b->next_bio,out,outl);
154 if (ret < 0)
155 BIO_copy_next_retry(b);
156 }
157 return(ret);
158 }
159
160static int nbiof_write(BIO *b, char *in, int inl)
161 {
162 NBIO_TEST *nt;
163 int ret=0;
164 int num;
165 unsigned char n;
166
167 if ((in == NULL) || (inl <= 0)) return(0);
168 if (b->next_bio == NULL) return(0);
169 nt=(NBIO_TEST *)b->ptr;
170
171 BIO_clear_retry_flags(b);
172
173#if 1
174 if (nt->lwn > 0)
175 {
176 num=nt->lwn;
177 nt->lwn=0;
178 }
179 else
180 {
181 RAND_bytes(&n,1);
182 num=(n&7);
183 }
184
185 if (inl > num) inl=num;
186
187 if (num == 0)
188 {
189 ret= -1;
190 BIO_set_retry_write(b);
191 }
192 else
193#endif
194 {
195 ret=BIO_write(b->next_bio,in,inl);
196 if (ret < 0)
197 {
198 BIO_copy_next_retry(b);
199 nt->lwn=inl;
200 }
201 }
202 return(ret);
203 }
204
205static long nbiof_ctrl(BIO *b, int cmd, long num, char *ptr)
206 {
207 long ret;
208
209 if (b->next_bio == NULL) return(0);
210 switch (cmd)
211 {
212 case BIO_C_DO_STATE_MACHINE:
213 BIO_clear_retry_flags(b);
214 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
215 BIO_copy_next_retry(b);
216 break;
217 case BIO_CTRL_DUP:
218 ret=0L;
219 break;
220 default:
221 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
222 break;
223 }
224 return(ret);
225 }
226
227static int nbiof_gets(BIO *bp, char *buf, int size)
228 {
229 if (bp->next_bio == NULL) return(0);
230 return(BIO_gets(bp->next_bio,buf,size));
231 }
232
233
234static int nbiof_puts(BIO *bp, char *str)
235 {
236 if (bp->next_bio == NULL) return(0);
237 return(BIO_puts(bp->next_bio,str));
238 }
239
240
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