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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/* $OpenBSD: bf_nbio.c,v 1.23 2023/07/05 21:23:37 beck 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#include <stdlib.h>
62
63#include <openssl/bio.h>
64
65#include "bio_local.h"
66
67/* BIO_put and BIO_get both add to the digest,
68 * BIO_gets returns the digest */
69
70static int nbiof_write(BIO *h, const char *buf, int num);
71static int nbiof_read(BIO *h, char *buf, int size);
72static int nbiof_puts(BIO *h, const char *str);
73static int nbiof_gets(BIO *h, char *str, int size);
74static long nbiof_ctrl(BIO *h, int cmd, long arg1, void *arg2);
75static int nbiof_new(BIO *h);
76static int nbiof_free(BIO *data);
77static long nbiof_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp);
78
79typedef struct nbio_test_st {
80 /* only set if we sent a 'should retry' error */
81 int lrn;
82 int lwn;
83} NBIO_TEST;
84
85static const BIO_METHOD methods_nbiof = {
86 .type = BIO_TYPE_NBIO_TEST,
87 .name = "non-blocking IO test filter",
88 .bwrite = nbiof_write,
89 .bread = nbiof_read,
90 .bputs = nbiof_puts,
91 .bgets = nbiof_gets,
92 .ctrl = nbiof_ctrl,
93 .create = nbiof_new,
94 .destroy = nbiof_free,
95 .callback_ctrl = nbiof_callback_ctrl
96};
97
98const BIO_METHOD *
99BIO_f_nbio_test(void)
100{
101 return (&methods_nbiof);
102}
103LCRYPTO_ALIAS(BIO_f_nbio_test);
104
105static int
106nbiof_new(BIO *bi)
107{
108 NBIO_TEST *nt;
109
110 if (!(nt = malloc(sizeof(NBIO_TEST))))
111 return (0);
112 nt->lrn = -1;
113 nt->lwn = -1;
114 bi->ptr = (char *)nt;
115 bi->init = 1;
116 bi->flags = 0;
117 return (1);
118}
119
120static int
121nbiof_free(BIO *a)
122{
123 if (a == NULL)
124 return (0);
125 free(a->ptr);
126 a->ptr = NULL;
127 a->init = 0;
128 a->flags = 0;
129 return (1);
130}
131
132static int
133nbiof_read(BIO *b, char *out, int outl)
134{
135 int ret = 0;
136 int num;
137 unsigned char n;
138
139 if (out == NULL)
140 return (0);
141 if (b->next_bio == NULL)
142 return (0);
143
144 BIO_clear_retry_flags(b);
145
146 arc4random_buf(&n, 1);
147 num = (n & 0x07);
148
149 if (outl > num)
150 outl = num;
151
152 if (num == 0) {
153 ret = -1;
154 BIO_set_retry_read(b);
155 } else {
156 ret = BIO_read(b->next_bio, out, outl);
157 if (ret < 0)
158 BIO_copy_next_retry(b);
159 }
160 return (ret);
161}
162
163static int
164nbiof_write(BIO *b, const char *in, int inl)
165{
166 NBIO_TEST *nt;
167 int ret = 0;
168 int num;
169 unsigned char n;
170
171 if ((in == NULL) || (inl <= 0))
172 return (0);
173 if (b->next_bio == NULL)
174 return (0);
175 nt = (NBIO_TEST *)b->ptr;
176
177 BIO_clear_retry_flags(b);
178
179 if (nt->lwn > 0) {
180 num = nt->lwn;
181 nt->lwn = 0;
182 } else {
183 arc4random_buf(&n, 1);
184 num = (n&7);
185 }
186
187 if (inl > num)
188 inl = num;
189
190 if (num == 0) {
191 ret = -1;
192 BIO_set_retry_write(b);
193 } else {
194 ret = BIO_write(b->next_bio, in, inl);
195 if (ret < 0) {
196 BIO_copy_next_retry(b);
197 nt->lwn = inl;
198 }
199 }
200 return (ret);
201}
202
203static long
204nbiof_ctrl(BIO *b, int cmd, long num, void *ptr)
205{
206 long ret;
207
208 if (b->next_bio == NULL)
209 return (0);
210 switch (cmd) {
211 case BIO_C_DO_STATE_MACHINE:
212 BIO_clear_retry_flags(b);
213 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
214 BIO_copy_next_retry(b);
215 break;
216 case BIO_CTRL_DUP:
217 ret = 0L;
218 break;
219 default:
220 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
221 break;
222 }
223 return (ret);
224}
225
226static long
227nbiof_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
228{
229 long ret = 1;
230
231 if (b->next_bio == NULL)
232 return (0);
233 switch (cmd) {
234 default:
235 ret = BIO_callback_ctrl(b->next_bio, cmd, fp);
236 break;
237 }
238 return (ret);
239}
240
241static int
242nbiof_gets(BIO *bp, char *buf, int size)
243{
244 if (bp->next_bio == NULL)
245 return (0);
246 return (BIO_gets(bp->next_bio, buf, size));
247}
248
249static int
250nbiof_puts(BIO *bp, const char *str)
251{
252 if (bp->next_bio == NULL)
253 return (0);
254 return (BIO_puts(bp->next_bio, str));
255}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-05-06 23:11:27 +0000