xref: /dragonfly/crypto/libressl/crypto/bio/bio_lib.c (revision 6f5ec8b5) 
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
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
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 *
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
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
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
206 BIO_vfree(BIO *a)
207 {
208 	BIO_free(a);
209 }
210 
211 int
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 *
219 BIO_get_data(BIO *a)
220 {
221 	return (a->ptr);
222 }
223 
224 void
225 BIO_set_data(BIO *a, void *ptr)
226 {
227 	a->ptr = ptr;
228 }
229 
230 int
231 BIO_get_init(BIO *a)
232 {
233 	return a->init;
234 }
235 
236 void
237 BIO_set_init(BIO *a, int init)
238 {
239 	a->init = init;
240 }
241 
242 int
243 BIO_get_shutdown(BIO *a)
244 {
245 	return (a->shutdown);
246 }
247 
248 void
249 BIO_set_shutdown(BIO *a, int shut)
250 {
251 	a->shutdown = shut;
252 }
253 
254 void
255 BIO_clear_flags(BIO *b, int flags)
256 {
257 	b->flags &= ~flags;
258 }
259 
260 int
261 BIO_test_flags(const BIO *b, int flags)
262 {
263 	return (b->flags & flags);
264 }
265 
266 void
267 BIO_set_flags(BIO *b, int flags)
268 {
269 	b->flags |= flags;
270 }
271 
272 BIO_callback_fn
273 BIO_get_callback(const BIO *b)
274 {
275 	return b->callback;
276 }
277 
278 void
279 BIO_set_callback(BIO *b, BIO_callback_fn cb)
280 {
281 	b->callback = cb;
282 }
283 
284 BIO_callback_fn_ex
285 BIO_get_callback_ex(const BIO *b)
286 {
287 	return b->callback_ex;
288 }
289 
290 void
291 BIO_set_callback_ex(BIO *b, BIO_callback_fn_ex cb)
292 {
293 	b->callback_ex = cb;
294 }
295 
296 void
297 BIO_set_callback_arg(BIO *b, char *arg)
298 {
299 	b->cb_arg = arg;
300 }
301 
302 char *
303 BIO_get_callback_arg(const BIO *b)
304 {
305 	return b->cb_arg;
306 }
307 
308 const char *
309 BIO_method_name(const BIO *b)
310 {
311 	return b->method->name;
312 }
313 
314 int
315 BIO_method_type(const BIO *b)
316 {
317 	return b->method->type;
318 }
319 
320 int
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
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
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
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
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
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 *
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
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
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
602 BIO_ctrl_pending(BIO *bio)
603 {
604 	return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
605 }
606 
607 size_t
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 *
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 *
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 *
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
675 BIO_get_retry_reason(BIO *bio)
676 {
677 	return (bio->retry_reason);
678 }
679 
680 void
681 BIO_set_retry_reason(BIO *bio, int reason)
682 {
683 	bio->retry_reason = reason;
684 }
685 
686 BIO *
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 *
709 BIO_next(BIO *b)
710 {
711 	if (!b)
712 		return NULL;
713 	return b->next_bio;
714 }
715 
716 void
717 BIO_set_next(BIO *b, BIO *next)
718 {
719 	b->next_bio = next;
720 }
721 
722 void
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 *
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
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
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
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 *
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
810 BIO_number_read(BIO *bio)
811 {
812 	if (bio)
813 		return bio->num_read;
814 	return 0;
815 }
816 
817 unsigned long
818 BIO_number_written(BIO *bio)
819 {
820 	if (bio)
821 		return bio->num_write;
822 	return 0;
823 }
824