1 /* $OpenBSD: bio_lib.c,v 1.36 2022/08/15 10:48:45 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 <limits.h>
61 #include <stdio.h>
62
63 #include <openssl/bio.h>
64 #include <openssl/crypto.h>
65 #include <openssl/err.h>
66 #include <openssl/stack.h>
67
68 #include "bio_local.h"
69
70 /*
71 * Helper function to work out whether to call the new style callback or the old
72 * one, and translate between the two.
73 *
74 * This has a long return type for consistency with the old callback. Similarly
75 * for the "long" used for "inret"
76 */
77 static long
bio_call_callback(BIO * b,int oper,const char * argp,size_t len,int argi,long argl,long inret,size_t * processed)78 bio_call_callback(BIO *b, int oper, const char *argp, size_t len, int argi,
79 long argl, long inret, size_t *processed)
80 {
81 long ret;
82 int bareoper;
83
84 if (b->callback_ex != NULL)
85 return b->callback_ex(b, oper, argp, len, argi, argl, inret,
86 processed);
87
88 /*
89 * We have an old style callback, so we will have to do nasty casts and
90 * check for overflows.
91 */
92
93 bareoper = oper & ~BIO_CB_RETURN;
94
95 if (bareoper == BIO_CB_READ || bareoper == BIO_CB_WRITE ||
96 bareoper == BIO_CB_GETS) {
97 /* In this case len is set and should be used instead of argi. */
98 if (len > INT_MAX)
99 return -1;
100 argi = (int)len;
101 }
102
103 if (inret > 0 && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
104 if (*processed > INT_MAX)
105 return -1;
106 inret = *processed;
107 }
108
109 ret = b->callback(b, oper, argp, argi, argl, inret);
110
111 if (ret > 0 && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
112 *processed = (size_t)ret;
113 ret = 1;
114 }
115
116 return ret;
117 }
118
119 int
BIO_get_new_index(void)120 BIO_get_new_index(void)
121 {
122 static int bio_type_index = BIO_TYPE_START;
123 int index;
124
125 /* The index will collide with the BIO flag bits if it exceeds 255. */
126 index = CRYPTO_add(&bio_type_index, 1, CRYPTO_LOCK_BIO);
127 if (index > 255)
128 return -1;
129
130 return index;
131 }
132
133 BIO *
BIO_new(const BIO_METHOD * method)134 BIO_new(const BIO_METHOD *method)
135 {
136 BIO *ret = NULL;
137
138 /* XXX calloc */
139 ret = malloc(sizeof(BIO));
140 if (ret == NULL) {
141 BIOerror(ERR_R_MALLOC_FAILURE);
142 return (NULL);
143 }
144 if (!BIO_set(ret, method)) {
145 free(ret);
146 ret = NULL;
147 }
148 return (ret);
149 }
150
151 int
BIO_set(BIO * bio,const BIO_METHOD * method)152 BIO_set(BIO *bio, const BIO_METHOD *method)
153 {
154 bio->method = method;
155 bio->callback = NULL;
156 bio->callback_ex = NULL;
157 bio->cb_arg = NULL;
158 bio->init = 0;
159 bio->shutdown = 1;
160 bio->flags = 0;
161 bio->retry_reason = 0;
162 bio->num = 0;
163 bio->ptr = NULL;
164 bio->prev_bio = NULL;
165 bio->next_bio = NULL;
166 bio->references = 1;
167 bio->num_read = 0L;
168 bio->num_write = 0L;
169 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
170 if (method->create != NULL) {
171 if (!method->create(bio)) {
172 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio,
173 &bio->ex_data);
174 return (0);
175 }
176 }
177 return (1);
178 }
179
180 int
BIO_free(BIO * a)181 BIO_free(BIO *a)
182 {
183 int ret;
184
185 if (a == NULL)
186 return (0);
187
188 if (CRYPTO_add(&a->references, -1, CRYPTO_LOCK_BIO) > 0)
189 return (1);
190
191 if (a->callback != NULL || a->callback_ex != NULL) {
192 if ((ret = (int)bio_call_callback(a, BIO_CB_FREE, NULL, 0, 0,
193 0L, 1L, NULL)) <= 0)
194 return (ret);
195 }
196
197 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
198
199 if (a->method != NULL && a->method->destroy != NULL)
200 a->method->destroy(a);
201 free(a);
202 return (1);
203 }
204
205 void
BIO_vfree(BIO * a)206 BIO_vfree(BIO *a)
207 {
208 BIO_free(a);
209 }
210
211 int
BIO_up_ref(BIO * bio)212 BIO_up_ref(BIO *bio)
213 {
214 int refs = CRYPTO_add(&bio->references, 1, CRYPTO_LOCK_BIO);
215 return (refs > 1) ? 1 : 0;
216 }
217
218 void *
BIO_get_data(BIO * a)219 BIO_get_data(BIO *a)
220 {
221 return (a->ptr);
222 }
223
224 void
BIO_set_data(BIO * a,void * ptr)225 BIO_set_data(BIO *a, void *ptr)
226 {
227 a->ptr = ptr;
228 }
229
230 int
BIO_get_init(BIO * a)231 BIO_get_init(BIO *a)
232 {
233 return a->init;
234 }
235
236 void
BIO_set_init(BIO * a,int init)237 BIO_set_init(BIO *a, int init)
238 {
239 a->init = init;
240 }
241
242 int
BIO_get_shutdown(BIO * a)243 BIO_get_shutdown(BIO *a)
244 {
245 return (a->shutdown);
246 }
247
248 void
BIO_set_shutdown(BIO * a,int shut)249 BIO_set_shutdown(BIO *a, int shut)
250 {
251 a->shutdown = shut;
252 }
253
254 void
BIO_clear_flags(BIO * b,int flags)255 BIO_clear_flags(BIO *b, int flags)
256 {
257 b->flags &= ~flags;
258 }
259
260 int
BIO_test_flags(const BIO * b,int flags)261 BIO_test_flags(const BIO *b, int flags)
262 {
263 return (b->flags & flags);
264 }
265
266 void
BIO_set_flags(BIO * b,int flags)267 BIO_set_flags(BIO *b, int flags)
268 {
269 b->flags |= flags;
270 }
271
272 BIO_callback_fn
BIO_get_callback(const BIO * b)273 BIO_get_callback(const BIO *b)
274 {
275 return b->callback;
276 }
277
278 void
BIO_set_callback(BIO * b,BIO_callback_fn cb)279 BIO_set_callback(BIO *b, BIO_callback_fn cb)
280 {
281 b->callback = cb;
282 }
283
284 BIO_callback_fn_ex
BIO_get_callback_ex(const BIO * b)285 BIO_get_callback_ex(const BIO *b)
286 {
287 return b->callback_ex;
288 }
289
290 void
BIO_set_callback_ex(BIO * b,BIO_callback_fn_ex cb)291 BIO_set_callback_ex(BIO *b, BIO_callback_fn_ex cb)
292 {
293 b->callback_ex = cb;
294 }
295
296 void
BIO_set_callback_arg(BIO * b,char * arg)297 BIO_set_callback_arg(BIO *b, char *arg)
298 {
299 b->cb_arg = arg;
300 }
301
302 char *
BIO_get_callback_arg(const BIO * b)303 BIO_get_callback_arg(const BIO *b)
304 {
305 return b->cb_arg;
306 }
307
308 const char *
BIO_method_name(const BIO * b)309 BIO_method_name(const BIO *b)
310 {
311 return b->method->name;
312 }
313
314 int
BIO_method_type(const BIO * b)315 BIO_method_type(const BIO *b)
316 {
317 return b->method->type;
318 }
319
320 int
BIO_read(BIO * b,void * out,int outl)321 BIO_read(BIO *b, void *out, int outl)
322 {
323 size_t readbytes = 0;
324 int ret;
325
326 if (b == NULL)
327 return (0);
328
329 if (out == NULL || outl <= 0)
330 return (0);
331
332 if (b->method == NULL || b->method->bread == NULL) {
333 BIOerror(BIO_R_UNSUPPORTED_METHOD);
334 return (-2);
335 }
336
337 if (b->callback != NULL || b->callback_ex != NULL) {
338 if ((ret = (int)bio_call_callback(b, BIO_CB_READ, out, outl, 0,
339 0L, 1L, NULL)) <= 0)
340 return (ret);
341 }
342
343 if (!b->init) {
344 BIOerror(BIO_R_UNINITIALIZED);
345 return (-2);
346 }
347
348 if ((ret = b->method->bread(b, out, outl)) > 0)
349 readbytes = (size_t)ret;
350
351 b->num_read += readbytes;
352
353 if (b->callback != NULL || b->callback_ex != NULL) {
354 ret = (int)bio_call_callback(b, BIO_CB_READ | BIO_CB_RETURN,
355 out, outl, 0, 0L, (ret > 0) ? 1 : ret, &readbytes);
356 }
357
358 if (ret > 0) {
359 if (readbytes > INT_MAX) {
360 BIOerror(BIO_R_LENGTH_TOO_LONG);
361 ret = -1;
362 } else {
363 ret = (int)readbytes;
364 }
365 }
366
367 return (ret);
368 }
369
370 int
BIO_write(BIO * b,const void * in,int inl)371 BIO_write(BIO *b, const void *in, int inl)
372 {
373 size_t writebytes = 0;
374 int ret;
375
376 if (b == NULL)
377 return (0);
378
379 if (in == NULL || inl <= 0)
380 return (0);
381
382 if (b->method == NULL || b->method->bwrite == NULL) {
383 BIOerror(BIO_R_UNSUPPORTED_METHOD);
384 return (-2);
385 }
386
387 if (b->callback != NULL || b->callback_ex != NULL) {
388 if ((ret = (int)bio_call_callback(b, BIO_CB_WRITE, in, inl, 0,
389 0L, 1L, NULL)) <= 0)
390 return (ret);
391 }
392
393 if (!b->init) {
394 BIOerror(BIO_R_UNINITIALIZED);
395 return (-2);
396 }
397
398 if ((ret = b->method->bwrite(b, in, inl)) > 0)
399 writebytes = ret;
400
401 b->num_write += writebytes;
402
403 if (b->callback != NULL || b->callback_ex != NULL) {
404 ret = (int)bio_call_callback(b, BIO_CB_WRITE | BIO_CB_RETURN,
405 in, inl, 0, 0L, (ret > 0) ? 1 : ret, &writebytes);
406 }
407
408 if (ret > 0) {
409 if (writebytes > INT_MAX) {
410 BIOerror(BIO_R_LENGTH_TOO_LONG);
411 ret = -1;
412 } else {
413 ret = (int)writebytes;
414 }
415 }
416
417 return (ret);
418 }
419
420 int
BIO_puts(BIO * b,const char * in)421 BIO_puts(BIO *b, const char *in)
422 {
423 size_t writebytes = 0;
424 int ret;
425
426 if (b == NULL || b->method == NULL || b->method->bputs == NULL) {
427 BIOerror(BIO_R_UNSUPPORTED_METHOD);
428 return (-2);
429 }
430
431 if (b->callback != NULL || b->callback_ex != NULL) {
432 if ((ret = (int)bio_call_callback(b, BIO_CB_PUTS, in, 0, 0, 0L,
433 1L, NULL)) <= 0)
434 return (ret);
435 }
436
437 if (!b->init) {
438 BIOerror(BIO_R_UNINITIALIZED);
439 return (-2);
440 }
441
442 if ((ret = b->method->bputs(b, in)) > 0)
443 writebytes = ret;
444
445 b->num_write += writebytes;
446
447 if (b->callback != NULL || b->callback_ex != NULL) {
448 ret = (int)bio_call_callback(b, BIO_CB_PUTS | BIO_CB_RETURN,
449 in, 0, 0, 0L, (ret > 0) ? 1 : ret, &writebytes);
450 }
451
452 if (ret > 0) {
453 if (writebytes > INT_MAX) {
454 BIOerror(BIO_R_LENGTH_TOO_LONG);
455 ret = -1;
456 } else {
457 ret = (int)writebytes;
458 }
459 }
460
461 return (ret);
462 }
463
464 int
BIO_gets(BIO * b,char * in,int inl)465 BIO_gets(BIO *b, char *in, int inl)
466 {
467 size_t readbytes = 0;
468 int ret;
469
470 if (b == NULL || b->method == NULL || b->method->bgets == NULL) {
471 BIOerror(BIO_R_UNSUPPORTED_METHOD);
472 return (-2);
473 }
474
475 if (b->callback != NULL || b->callback_ex != NULL) {
476 if ((ret = (int)bio_call_callback(b, BIO_CB_GETS, in, inl, 0, 0L,
477 1, NULL)) <= 0)
478 return (ret);
479 }
480
481 if (!b->init) {
482 BIOerror(BIO_R_UNINITIALIZED);
483 return (-2);
484 }
485
486 if ((ret = b->method->bgets(b, in, inl)) > 0)
487 readbytes = ret;
488
489 if (b->callback != NULL || b->callback_ex != NULL) {
490 ret = (int)bio_call_callback(b, BIO_CB_GETS | BIO_CB_RETURN, in,
491 inl, 0, 0L, (ret > 0) ? 1 : ret, &readbytes);
492 }
493
494 if (ret > 0) {
495 if (readbytes > INT_MAX) {
496 BIOerror(BIO_R_LENGTH_TOO_LONG);
497 ret = -1;
498 } else {
499 ret = (int)readbytes;
500 }
501 }
502
503 return (ret);
504 }
505
506 int
BIO_indent(BIO * b,int indent,int max)507 BIO_indent(BIO *b, int indent, int max)
508 {
509 if (indent > max)
510 indent = max;
511 if (indent < 0)
512 indent = 0;
513 while (indent--)
514 if (BIO_puts(b, " ") != 1)
515 return 0;
516 return 1;
517 }
518
519 long
BIO_int_ctrl(BIO * b,int cmd,long larg,int iarg)520 BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
521 {
522 int i;
523
524 i = iarg;
525 return (BIO_ctrl(b, cmd, larg, (char *)&i));
526 }
527
528 char *
BIO_ptr_ctrl(BIO * b,int cmd,long larg)529 BIO_ptr_ctrl(BIO *b, int cmd, long larg)
530 {
531 char *p = NULL;
532
533 if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
534 return (NULL);
535 else
536 return (p);
537 }
538
539 long
BIO_ctrl(BIO * b,int cmd,long larg,void * parg)540 BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
541 {
542 long ret;
543
544 if (b == NULL)
545 return (0);
546
547 if (b->method == NULL || b->method->ctrl == NULL) {
548 BIOerror(BIO_R_UNSUPPORTED_METHOD);
549 return (-2);
550 }
551
552 if (b->callback != NULL || b->callback_ex != NULL) {
553 if ((ret = bio_call_callback(b, BIO_CB_CTRL, parg, 0, cmd, larg,
554 1L, NULL)) <= 0)
555 return (ret);
556 }
557
558 ret = b->method->ctrl(b, cmd, larg, parg);
559
560 if (b->callback != NULL || b->callback_ex != NULL) {
561 ret = bio_call_callback(b, BIO_CB_CTRL | BIO_CB_RETURN, parg, 0,
562 cmd, larg, ret, NULL);
563 }
564
565 return (ret);
566 }
567
568 long
BIO_callback_ctrl(BIO * b,int cmd,BIO_info_cb * fp)569 BIO_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
570 {
571 long ret;
572
573 if (b == NULL)
574 return (0);
575
576 if (b->method == NULL || b->method->callback_ctrl == NULL ||
577 cmd != BIO_CTRL_SET_CALLBACK) {
578 BIOerror(BIO_R_UNSUPPORTED_METHOD);
579 return (-2);
580 }
581
582 if (b->callback != NULL || b->callback_ex != NULL) {
583 if ((ret = bio_call_callback(b, BIO_CB_CTRL, (void *)&fp, 0,
584 cmd, 0, 1L, NULL)) <= 0)
585 return (ret);
586 }
587
588 ret = b->method->callback_ctrl(b, cmd, fp);
589
590 if (b->callback != NULL || b->callback_ex != NULL) {
591 ret = bio_call_callback(b, BIO_CB_CTRL | BIO_CB_RETURN,
592 (void *)&fp, 0, cmd, 0, ret, NULL);
593 }
594
595 return (ret);
596 }
597
598 /* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
599 * do; but those macros have inappropriate return type, and for interfacing
600 * from other programming languages, C macros aren't much of a help anyway. */
601 size_t
BIO_ctrl_pending(BIO * bio)602 BIO_ctrl_pending(BIO *bio)
603 {
604 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
605 }
606
607 size_t
BIO_ctrl_wpending(BIO * bio)608 BIO_ctrl_wpending(BIO *bio)
609 {
610 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
611 }
612
613
614 /* put the 'bio' on the end of b's list of operators */
615 BIO *
BIO_push(BIO * b,BIO * bio)616 BIO_push(BIO *b, BIO *bio)
617 {
618 BIO *lb;
619
620 if (b == NULL)
621 return (bio);
622 lb = b;
623 while (lb->next_bio != NULL)
624 lb = lb->next_bio;
625 lb->next_bio = bio;
626 if (bio != NULL)
627 bio->prev_bio = lb;
628 /* called to do internal processing */
629 BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
630 return (b);
631 }
632
633 /* Remove the first and return the rest */
634 BIO *
BIO_pop(BIO * b)635 BIO_pop(BIO *b)
636 {
637 BIO *ret;
638
639 if (b == NULL)
640 return (NULL);
641 ret = b->next_bio;
642
643 BIO_ctrl(b, BIO_CTRL_POP, 0, b);
644
645 if (b->prev_bio != NULL)
646 b->prev_bio->next_bio = b->next_bio;
647 if (b->next_bio != NULL)
648 b->next_bio->prev_bio = b->prev_bio;
649
650 b->next_bio = NULL;
651 b->prev_bio = NULL;
652 return (ret);
653 }
654
655 BIO *
BIO_get_retry_BIO(BIO * bio,int * reason)656 BIO_get_retry_BIO(BIO *bio, int *reason)
657 {
658 BIO *b, *last;
659
660 b = last = bio;
661 for (;;) {
662 if (!BIO_should_retry(b))
663 break;
664 last = b;
665 b = b->next_bio;
666 if (b == NULL)
667 break;
668 }
669 if (reason != NULL)
670 *reason = last->retry_reason;
671 return (last);
672 }
673
674 int
BIO_get_retry_reason(BIO * bio)675 BIO_get_retry_reason(BIO *bio)
676 {
677 return (bio->retry_reason);
678 }
679
680 void
BIO_set_retry_reason(BIO * bio,int reason)681 BIO_set_retry_reason(BIO *bio, int reason)
682 {
683 bio->retry_reason = reason;
684 }
685
686 BIO *
BIO_find_type(BIO * bio,int type)687 BIO_find_type(BIO *bio, int type)
688 {
689 int mt, mask;
690
691 if (!bio)
692 return NULL;
693 mask = type & 0xff;
694 do {
695 if (bio->method != NULL) {
696 mt = bio->method->type;
697 if (!mask) {
698 if (mt & type)
699 return (bio);
700 } else if (mt == type)
701 return (bio);
702 }
703 bio = bio->next_bio;
704 } while (bio != NULL);
705 return (NULL);
706 }
707
708 BIO *
BIO_next(BIO * b)709 BIO_next(BIO *b)
710 {
711 if (!b)
712 return NULL;
713 return b->next_bio;
714 }
715
716 void
BIO_set_next(BIO * b,BIO * next)717 BIO_set_next(BIO *b, BIO *next)
718 {
719 b->next_bio = next;
720 }
721
722 void
BIO_free_all(BIO * bio)723 BIO_free_all(BIO *bio)
724 {
725 BIO *b;
726 int ref;
727
728 while (bio != NULL) {
729 b = bio;
730 ref = b->references;
731 bio = bio->next_bio;
732 BIO_free(b);
733 /* Since ref count > 1, don't free anyone else. */
734 if (ref > 1)
735 break;
736 }
737 }
738
739 BIO *
BIO_dup_chain(BIO * in)740 BIO_dup_chain(BIO *in)
741 {
742 BIO *ret = NULL, *eoc = NULL, *bio, *new_bio;
743
744 for (bio = in; bio != NULL; bio = bio->next_bio) {
745 if ((new_bio = BIO_new(bio->method)) == NULL)
746 goto err;
747 new_bio->callback = bio->callback;
748 new_bio->callback_ex = bio->callback_ex;
749 new_bio->cb_arg = bio->cb_arg;
750 new_bio->init = bio->init;
751 new_bio->shutdown = bio->shutdown;
752 new_bio->flags = bio->flags;
753
754 /* This will let SSL_s_sock() work with stdin/stdout */
755 new_bio->num = bio->num;
756
757 if (!BIO_dup_state(bio, (char *)new_bio)) {
758 BIO_free(new_bio);
759 goto err;
760 }
761
762 /* copy app data */
763 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO,
764 &new_bio->ex_data, &bio->ex_data))
765 goto err;
766
767 if (ret == NULL) {
768 eoc = new_bio;
769 ret = eoc;
770 } else {
771 BIO_push(eoc, new_bio);
772 eoc = new_bio;
773 }
774 }
775 return (ret);
776 err:
777 BIO_free(ret);
778 return (NULL);
779
780 }
781
782 void
BIO_copy_next_retry(BIO * b)783 BIO_copy_next_retry(BIO *b)
784 {
785 BIO_set_flags(b, BIO_get_retry_flags(b->next_bio));
786 b->retry_reason = b->next_bio->retry_reason;
787 }
788
789 int
BIO_get_ex_new_index(long argl,void * argp,CRYPTO_EX_new * new_func,CRYPTO_EX_dup * dup_func,CRYPTO_EX_free * free_func)790 BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
791 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
792 {
793 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp,
794 new_func, dup_func, free_func);
795 }
796
797 int
BIO_set_ex_data(BIO * bio,int idx,void * data)798 BIO_set_ex_data(BIO *bio, int idx, void *data)
799 {
800 return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data));
801 }
802
803 void *
BIO_get_ex_data(BIO * bio,int idx)804 BIO_get_ex_data(BIO *bio, int idx)
805 {
806 return (CRYPTO_get_ex_data(&(bio->ex_data), idx));
807 }
808
809 unsigned long
BIO_number_read(BIO * bio)810 BIO_number_read(BIO *bio)
811 {
812 if (bio)
813 return bio->num_read;
814 return 0;
815 }
816
817 unsigned long
BIO_number_written(BIO * bio)818 BIO_number_written(BIO *bio)
819 {
820 if (bio)
821 return bio->num_write;
822 return 0;
823 }
824