1 /* $OpenBSD: bio_lib.c,v 1.27 2018/02/22 16:38:43 jsing Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
62 #include <openssl/bio.h>
63 #include <openssl/crypto.h>
64 #include <openssl/err.h>
65 #include <openssl/stack.h>
68 BIO_get_new_index(void)
70 static int bio_type_index
= BIO_TYPE_START
;
73 /* The index will collide with the BIO flag bits if it exceeds 255. */
74 index
= CRYPTO_add(&bio_type_index
, 1, CRYPTO_LOCK_BIO
);
82 BIO_new(BIO_METHOD
*method
)
86 ret
= malloc(sizeof(BIO
));
88 BIOerror(ERR_R_MALLOC_FAILURE
);
91 if (!BIO_set(ret
, method
)) {
99 BIO_set(BIO
*bio
, BIO_METHOD
*method
)
101 bio
->method
= method
;
102 bio
->callback
= NULL
;
107 bio
->retry_reason
= 0;
110 bio
->prev_bio
= NULL
;
111 bio
->next_bio
= NULL
;
115 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO
, bio
, &bio
->ex_data
);
116 if (method
->create
!= NULL
)
117 if (!method
->create(bio
)) {
118 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO
, bio
,
133 i
= CRYPTO_add(&a
->references
, -1, CRYPTO_LOCK_BIO
);
136 if ((a
->callback
!= NULL
) &&
137 ((i
= (int)a
->callback(a
, BIO_CB_FREE
, NULL
, 0, 0L, 1L)) <= 0))
140 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO
, a
, &a
->ex_data
);
142 if (a
->method
!= NULL
&& a
->method
->destroy
!= NULL
)
143 a
->method
->destroy(a
);
157 int refs
= CRYPTO_add(&bio
->references
, 1, CRYPTO_LOCK_BIO
);
158 return (refs
> 1) ? 1 : 0;
168 BIO_set_data(BIO
*a
, void *ptr
)
174 BIO_set_init(BIO
*a
, int init
)
180 BIO_get_shutdown(BIO
*a
)
182 return (a
->shutdown
);
186 BIO_set_shutdown(BIO
*a
, int shut
)
192 BIO_clear_flags(BIO
*b
, int flags
)
198 BIO_test_flags(const BIO
*b
, int flags
)
200 return (b
->flags
& flags
);
204 BIO_set_flags(BIO
*b
, int flags
)
210 (*BIO_get_callback(const BIO
*b
))(struct bio_st
*, int, const char *, int,
217 BIO_set_callback(BIO
*b
, long (*cb
)(struct bio_st
*, int, const char *, int,
224 BIO_set_callback_arg(BIO
*b
, char *arg
)
230 BIO_get_callback_arg(const BIO
*b
)
236 BIO_method_name(const BIO
*b
)
238 return b
->method
->name
;
242 BIO_method_type(const BIO
*b
)
244 return b
->method
->type
;
248 BIO_read(BIO
*b
, void *out
, int outl
)
251 long (*cb
)(BIO
*, int, const char *, int, long, long);
253 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bread
== NULL
)) {
254 BIOerror(BIO_R_UNSUPPORTED_METHOD
);
260 ((i
= (int)cb(b
, BIO_CB_READ
, out
, outl
, 0L, 1L)) <= 0))
264 BIOerror(BIO_R_UNINITIALIZED
);
268 i
= b
->method
->bread(b
, out
, outl
);
271 b
->num_read
+= (unsigned long)i
;
274 i
= (int)cb(b
, BIO_CB_READ
|BIO_CB_RETURN
, out
, outl
,
280 BIO_write(BIO
*b
, const void *in
, int inl
)
283 long (*cb
)(BIO
*, int, const char *, int, long, long);
289 if ((b
->method
== NULL
) || (b
->method
->bwrite
== NULL
)) {
290 BIOerror(BIO_R_UNSUPPORTED_METHOD
);
295 ((i
= (int)cb(b
, BIO_CB_WRITE
, in
, inl
, 0L, 1L)) <= 0))
299 BIOerror(BIO_R_UNINITIALIZED
);
303 i
= b
->method
->bwrite(b
, in
, inl
);
306 b
->num_write
+= (unsigned long)i
;
309 i
= (int)cb(b
, BIO_CB_WRITE
|BIO_CB_RETURN
, in
, inl
,
315 BIO_puts(BIO
*b
, const char *in
)
318 long (*cb
)(BIO
*, int, const char *, int, long, long);
320 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bputs
== NULL
)) {
321 BIOerror(BIO_R_UNSUPPORTED_METHOD
);
328 ((i
= (int)cb(b
, BIO_CB_PUTS
, in
, 0, 0L, 1L)) <= 0))
332 BIOerror(BIO_R_UNINITIALIZED
);
336 i
= b
->method
->bputs(b
, in
);
339 b
->num_write
+= (unsigned long)i
;
342 i
= (int)cb(b
, BIO_CB_PUTS
|BIO_CB_RETURN
, in
, 0, 0L, (long)i
);
347 BIO_gets(BIO
*b
, char *in
, int inl
)
350 long (*cb
)(BIO
*, int, const char *, int, long, long);
352 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bgets
== NULL
)) {
353 BIOerror(BIO_R_UNSUPPORTED_METHOD
);
360 ((i
= (int)cb(b
, BIO_CB_GETS
, in
, inl
, 0L, 1L)) <= 0))
364 BIOerror(BIO_R_UNINITIALIZED
);
368 i
= b
->method
->bgets(b
, in
, inl
);
371 i
= (int)cb(b
, BIO_CB_GETS
|BIO_CB_RETURN
, in
, inl
, 0L, (long)i
);
376 BIO_indent(BIO
*b
, int indent
, int max
)
383 if (BIO_puts(b
, " ") != 1)
389 BIO_int_ctrl(BIO
*b
, int cmd
, long larg
, int iarg
)
394 return (BIO_ctrl(b
, cmd
, larg
, (char *)&i
));
398 BIO_ptr_ctrl(BIO
*b
, int cmd
, long larg
)
402 if (BIO_ctrl(b
, cmd
, larg
, (char *)&p
) <= 0)
409 BIO_ctrl(BIO
*b
, int cmd
, long larg
, void *parg
)
412 long (*cb
)(BIO
*, int, const char *, int, long, long);
417 if ((b
->method
== NULL
) || (b
->method
->ctrl
== NULL
)) {
418 BIOerror(BIO_R_UNSUPPORTED_METHOD
);
425 ((ret
= cb(b
, BIO_CB_CTRL
, parg
, cmd
, larg
, 1L)) <= 0))
428 ret
= b
->method
->ctrl(b
, cmd
, larg
, parg
);
431 ret
= cb(b
, BIO_CB_CTRL
|BIO_CB_RETURN
, parg
, cmd
, larg
, ret
);
436 BIO_callback_ctrl(BIO
*b
, int cmd
,
437 void (*fp
)(struct bio_st
*, int, const char *, int, long, long))
440 long (*cb
)(BIO
*, int, const char *, int, long, long);
445 if ((b
->method
== NULL
) || (b
->method
->callback_ctrl
== NULL
)) {
446 BIOerror(BIO_R_UNSUPPORTED_METHOD
);
453 ((ret
= cb(b
, BIO_CB_CTRL
, (void *)&fp
, cmd
, 0, 1L)) <= 0))
456 ret
= b
->method
->callback_ctrl(b
, cmd
, fp
);
459 ret
= cb(b
, BIO_CB_CTRL
|BIO_CB_RETURN
, (void *)&fp
, cmd
, 0, ret
);
463 /* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
464 * do; but those macros have inappropriate return type, and for interfacing
465 * from other programming languages, C macros aren't much of a help anyway. */
467 BIO_ctrl_pending(BIO
*bio
)
469 return BIO_ctrl(bio
, BIO_CTRL_PENDING
, 0, NULL
);
473 BIO_ctrl_wpending(BIO
*bio
)
475 return BIO_ctrl(bio
, BIO_CTRL_WPENDING
, 0, NULL
);
479 /* put the 'bio' on the end of b's list of operators */
481 BIO_push(BIO
*b
, BIO
*bio
)
488 while (lb
->next_bio
!= NULL
)
493 /* called to do internal processing */
494 BIO_ctrl(b
, BIO_CTRL_PUSH
, 0, lb
);
498 /* Remove the first and return the rest */
508 BIO_ctrl(b
, BIO_CTRL_POP
, 0, b
);
510 if (b
->prev_bio
!= NULL
)
511 b
->prev_bio
->next_bio
= b
->next_bio
;
512 if (b
->next_bio
!= NULL
)
513 b
->next_bio
->prev_bio
= b
->prev_bio
;
521 BIO_get_retry_BIO(BIO
*bio
, int *reason
)
527 if (!BIO_should_retry(b
))
535 *reason
= last
->retry_reason
;
540 BIO_get_retry_reason(BIO
*bio
)
542 return (bio
->retry_reason
);
546 BIO_find_type(BIO
*bio
, int type
)
554 if (bio
->method
!= NULL
) {
555 mt
= bio
->method
->type
;
559 } else if (mt
== type
)
563 } while (bio
!= NULL
);
576 BIO_free_all(BIO
*bio
)
581 while (bio
!= NULL
) {
586 /* Since ref count > 1, don't free anyone else. */
593 BIO_dup_chain(BIO
*in
)
595 BIO
*ret
= NULL
, *eoc
= NULL
, *bio
, *new_bio
;
597 for (bio
= in
; bio
!= NULL
; bio
= bio
->next_bio
) {
598 if ((new_bio
= BIO_new(bio
->method
)) == NULL
)
600 new_bio
->callback
= bio
->callback
;
601 new_bio
->cb_arg
= bio
->cb_arg
;
602 new_bio
->init
= bio
->init
;
603 new_bio
->shutdown
= bio
->shutdown
;
604 new_bio
->flags
= bio
->flags
;
606 /* This will let SSL_s_sock() work with stdin/stdout */
607 new_bio
->num
= bio
->num
;
609 if (!BIO_dup_state(bio
, (char *)new_bio
)) {
615 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO
,
616 &new_bio
->ex_data
, &bio
->ex_data
))
623 BIO_push(eoc
, new_bio
);
635 BIO_copy_next_retry(BIO
*b
)
637 BIO_set_flags(b
, BIO_get_retry_flags(b
->next_bio
));
638 b
->retry_reason
= b
->next_bio
->retry_reason
;
642 BIO_get_ex_new_index(long argl
, void *argp
, CRYPTO_EX_new
*new_func
,
643 CRYPTO_EX_dup
*dup_func
, CRYPTO_EX_free
*free_func
)
645 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO
, argl
, argp
,
646 new_func
, dup_func
, free_func
);
650 BIO_set_ex_data(BIO
*bio
, int idx
, void *data
)
652 return (CRYPTO_set_ex_data(&(bio
->ex_data
), idx
, data
));
656 BIO_get_ex_data(BIO
*bio
, int idx
)
658 return (CRYPTO_get_ex_data(&(bio
->ex_data
), idx
));
662 BIO_number_read(BIO
*bio
)
665 return bio
->num_read
;
670 BIO_number_written(BIO
*bio
)
673 return bio
->num_write
;