]>
git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/bio/bio_lib.c
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
12 #include <openssl/crypto.h>
14 #include "internal/cryptlib.h"
16 BIO
*BIO_new(const BIO_METHOD
*method
)
18 BIO
*bio
= OPENSSL_zalloc(sizeof(*bio
));
21 BIOerr(BIO_F_BIO_NEW
, ERR_R_MALLOC_FAILURE
);
29 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO
, bio
, &bio
->ex_data
))
32 bio
->lock
= CRYPTO_THREAD_lock_new();
33 if (bio
->lock
== NULL
) {
34 BIOerr(BIO_F_BIO_NEW
, ERR_R_MALLOC_FAILURE
);
35 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO
, bio
, &bio
->ex_data
);
39 if (method
->create
!= NULL
&& !method
->create(bio
)) {
40 BIOerr(BIO_F_BIO_NEW
, ERR_R_INIT_FAIL
);
41 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO
, bio
, &bio
->ex_data
);
42 CRYPTO_THREAD_lock_free(bio
->lock
);
60 if (CRYPTO_atomic_add(&a
->references
, -1, &i
, a
->lock
) <= 0)
63 REF_PRINT_COUNT("BIO", a
);
66 REF_ASSERT_ISNT(i
< 0);
67 if ((a
->callback
!= NULL
) &&
68 ((i
= (int)a
->callback(a
, BIO_CB_FREE
, NULL
, 0, 0L, 1L)) <= 0))
71 if ((a
->method
!= NULL
) && (a
->method
->destroy
!= NULL
))
72 a
->method
->destroy(a
);
74 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO
, a
, &a
->ex_data
);
76 CRYPTO_THREAD_lock_free(a
->lock
);
83 void BIO_set_data(BIO
*a
, void *ptr
)
88 void *BIO_get_data(BIO
*a
)
93 void BIO_set_init(BIO
*a
, int init
)
98 int BIO_get_init(BIO
*a
)
103 void BIO_set_shutdown(BIO
*a
, int shut
)
108 int BIO_get_shutdown(BIO
*a
)
113 void BIO_vfree(BIO
*a
)
118 int BIO_up_ref(BIO
*a
)
122 if (CRYPTO_atomic_add(&a
->references
, 1, &i
, a
->lock
) <= 0)
125 REF_PRINT_COUNT("BIO", a
);
126 REF_ASSERT_ISNT(i
< 2);
127 return ((i
> 1) ? 1 : 0);
130 void BIO_clear_flags(BIO
*b
, int flags
)
135 int BIO_test_flags(const BIO
*b
, int flags
)
137 return (b
->flags
& flags
);
140 void BIO_set_flags(BIO
*b
, int flags
)
145 BIO_callback_fn
BIO_get_callback(const BIO
*b
)
150 void BIO_set_callback(BIO
*b
, BIO_callback_fn cb
)
155 BIO_callback_fn_ex
BIO_get_callback_ex(const BIO
*b
)
157 return b
->callback_ex
;
160 void BIO_set_callback_ex(BIO
*b
, BIO_callback_fn_ex cb
)
165 void BIO_set_callback_arg(BIO
*b
, char *arg
)
170 char *BIO_get_callback_arg(const BIO
*b
)
175 const char *BIO_method_name(const BIO
*b
)
177 return b
->method
->name
;
180 int BIO_method_type(const BIO
*b
)
182 return b
->method
->type
;
185 static int bio_call_callback(BIO
*b
, int oper
, const char *argp
, size_t len
,
186 int argi
, long argl
, int inret
, size_t *processed
,
192 if (b
->callback_ex
!= NULL
) {
193 return b
->callback_ex(b
, oper
, argp
, len
, argi
, argl
, inret
, processed
,
197 /* Strip off the BIO_CB_RETURN flag */
198 bareoper
= oper
& ~BIO_CB_RETURN
;
200 * We have an old style callback, so we will have to do nasty casts and
201 * check for overflows.
203 if (bareoper
== BIO_CB_READ
|| bareoper
== BIO_CB_WRITE
204 || bareoper
== BIO_CB_GETS
) {
205 /* In this case |len| is set, and should be used instead of |argi| */
211 if (inret
&& (oper
& BIO_CB_RETURN
)) {
212 if (*processed
> INT_MAX
)
218 ret
= b
->callback(b
, oper
, argp
, argi
, argl
, inret
);
219 if (bareoper
== BIO_CB_CTRL
)
222 if (ret
> INT_MAX
|| ret
< INT_MIN
)
229 *processed
= (size_t)ret
;
236 int BIO_read(BIO
*b
, void *out
, int outl
)
244 ret
= BIO_read_ex(b
, out
, (size_t)outl
, &read
);
247 /* *read should always be <= outl */
254 int BIO_read_ex(BIO
*b
, void *out
, size_t outl
, size_t *read
)
258 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bread
== NULL
)) {
259 BIOerr(BIO_F_BIO_READ_EX
, BIO_R_UNSUPPORTED_METHOD
);
263 if ((b
->callback
!= NULL
|| b
->callback_ex
!= NULL
) &&
264 ((ret
= bio_call_callback(b
, BIO_CB_READ
, out
, outl
, 0, 0L, 1L, read
,
269 BIOerr(BIO_F_BIO_READ_EX
, BIO_R_UNINITIALIZED
);
273 ret
= b
->method
->bread(b
, out
, outl
, read
);
276 b
->num_read
+= (uint64_t)*read
;
278 if (b
->callback
!= NULL
|| b
->callback_ex
!= NULL
)
279 ret
= bio_call_callback(b
, BIO_CB_READ
| BIO_CB_RETURN
, out
, outl
, 0,
280 0L, ret
, read
, NULL
);
285 int BIO_write(BIO
*b
, const void *in
, int inl
)
293 ret
= BIO_write_ex(b
, in
, (size_t)inl
, &written
);
296 /* *written should always be <= inl */
303 int BIO_write_ex(BIO
*b
, const void *in
, size_t inl
, size_t *written
)
310 if ((b
->method
== NULL
) || (b
->method
->bwrite
== NULL
)) {
311 BIOerr(BIO_F_BIO_WRITE_EX
, BIO_R_UNSUPPORTED_METHOD
);
315 if ((b
->callback
!= NULL
|| b
->callback_ex
!= NULL
) &&
316 ((ret
= bio_call_callback(b
, BIO_CB_WRITE
, in
, inl
, 0, 0L, 1L, written
,
321 BIOerr(BIO_F_BIO_WRITE_EX
, BIO_R_UNINITIALIZED
);
325 ret
= b
->method
->bwrite(b
, in
, inl
, written
);
328 b
->num_write
+= (uint64_t)*written
;
330 if (b
->callback
!= NULL
|| b
->callback_ex
!= NULL
)
331 ret
= bio_call_callback(b
, BIO_CB_WRITE
| BIO_CB_RETURN
, in
, inl
, 0,
332 0L, ret
, written
, NULL
);
337 int BIO_puts(BIO
*b
, const char *in
)
340 long (*cb
) (BIO
*, int, const char *, int, long, long);
342 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bputs
== NULL
)) {
343 BIOerr(BIO_F_BIO_PUTS
, BIO_R_UNSUPPORTED_METHOD
);
349 if ((cb
!= NULL
) && ((i
= (int)cb(b
, BIO_CB_PUTS
, in
, 0, 0L, 1L)) <= 0))
353 BIOerr(BIO_F_BIO_PUTS
, BIO_R_UNINITIALIZED
);
357 i
= b
->method
->bputs(b
, in
);
360 b
->num_write
+= (uint64_t)i
;
363 i
= (int)cb(b
, BIO_CB_PUTS
| BIO_CB_RETURN
, in
, 0, 0L, (long)i
);
367 int BIO_gets(BIO
*b
, char *in
, int inl
)
370 long (*cb
) (BIO
*, int, const char *, int, long, long);
372 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bgets
== NULL
)) {
373 BIOerr(BIO_F_BIO_GETS
, BIO_R_UNSUPPORTED_METHOD
);
379 if ((cb
!= NULL
) && ((i
= (int)cb(b
, BIO_CB_GETS
, in
, inl
, 0L, 1L)) <= 0))
383 BIOerr(BIO_F_BIO_GETS
, BIO_R_UNINITIALIZED
);
387 i
= b
->method
->bgets(b
, in
, inl
);
390 i
= (int)cb(b
, BIO_CB_GETS
| BIO_CB_RETURN
, in
, inl
, 0L, (long)i
);
394 int BIO_indent(BIO
*b
, int indent
, int max
)
401 if (BIO_puts(b
, " ") != 1)
406 long BIO_int_ctrl(BIO
*b
, int cmd
, long larg
, int iarg
)
411 return (BIO_ctrl(b
, cmd
, larg
, (char *)&i
));
414 void *BIO_ptr_ctrl(BIO
*b
, int cmd
, long larg
)
418 if (BIO_ctrl(b
, cmd
, larg
, (char *)&p
) <= 0)
424 long BIO_ctrl(BIO
*b
, int cmd
, long larg
, void *parg
)
427 long (*cb
) (BIO
*, int, const char *, int, long, long);
432 if ((b
->method
== NULL
) || (b
->method
->ctrl
== NULL
)) {
433 BIOerr(BIO_F_BIO_CTRL
, BIO_R_UNSUPPORTED_METHOD
);
440 ((ret
= cb(b
, BIO_CB_CTRL
, parg
, cmd
, larg
, 1L)) <= 0))
443 ret
= b
->method
->ctrl(b
, cmd
, larg
, parg
);
446 ret
= cb(b
, BIO_CB_CTRL
| BIO_CB_RETURN
, parg
, cmd
, larg
, ret
);
450 long BIO_callback_ctrl(BIO
*b
, int cmd
,
451 void (*fp
) (struct bio_st
*, int, const char *, int,
455 long (*cb
) (BIO
*, int, const char *, int, long, long);
460 if ((b
->method
== NULL
) || (b
->method
->callback_ctrl
== NULL
)) {
461 BIOerr(BIO_F_BIO_CALLBACK_CTRL
, BIO_R_UNSUPPORTED_METHOD
);
468 ((ret
= cb(b
, BIO_CB_CTRL
, (void *)&fp
, cmd
, 0, 1L)) <= 0))
471 ret
= b
->method
->callback_ctrl(b
, cmd
, fp
);
474 ret
= cb(b
, BIO_CB_CTRL
| BIO_CB_RETURN
, (void *)&fp
, cmd
, 0, ret
);
479 * It is unfortunate to duplicate in functions what the BIO_(w)pending macros
480 * do; but those macros have inappropriate return type, and for interfacing
481 * from other programming languages, C macros aren't much of a help anyway.
483 size_t BIO_ctrl_pending(BIO
*bio
)
485 return BIO_ctrl(bio
, BIO_CTRL_PENDING
, 0, NULL
);
488 size_t BIO_ctrl_wpending(BIO
*bio
)
490 return BIO_ctrl(bio
, BIO_CTRL_WPENDING
, 0, NULL
);
493 /* put the 'bio' on the end of b's list of operators */
494 BIO
*BIO_push(BIO
*b
, BIO
*bio
)
501 while (lb
->next_bio
!= NULL
)
506 /* called to do internal processing */
507 BIO_ctrl(b
, BIO_CTRL_PUSH
, 0, lb
);
511 /* Remove the first and return the rest */
520 BIO_ctrl(b
, BIO_CTRL_POP
, 0, b
);
522 if (b
->prev_bio
!= NULL
)
523 b
->prev_bio
->next_bio
= b
->next_bio
;
524 if (b
->next_bio
!= NULL
)
525 b
->next_bio
->prev_bio
= b
->prev_bio
;
532 BIO
*BIO_get_retry_BIO(BIO
*bio
, int *reason
)
538 if (!BIO_should_retry(b
))
546 *reason
= last
->retry_reason
;
550 int BIO_get_retry_reason(BIO
*bio
)
552 return (bio
->retry_reason
);
555 void BIO_set_retry_reason(BIO
*bio
, int reason
)
557 bio
->retry_reason
= reason
;
560 BIO
*BIO_find_type(BIO
*bio
, int type
)
568 if (bio
->method
!= NULL
) {
569 mt
= bio
->method
->type
;
574 } else if (mt
== type
)
578 } while (bio
!= NULL
);
582 BIO
*BIO_next(BIO
*b
)
589 void BIO_set_next(BIO
*b
, BIO
*next
)
594 void BIO_free_all(BIO
*bio
)
599 while (bio
!= NULL
) {
604 /* Since ref count > 1, don't free anyone else. */
610 BIO
*BIO_dup_chain(BIO
*in
)
612 BIO
*ret
= NULL
, *eoc
= NULL
, *bio
, *new_bio
;
614 for (bio
= in
; bio
!= NULL
; bio
= bio
->next_bio
) {
615 if ((new_bio
= BIO_new(bio
->method
)) == NULL
)
617 new_bio
->callback
= bio
->callback
;
618 new_bio
->cb_arg
= bio
->cb_arg
;
619 new_bio
->init
= bio
->init
;
620 new_bio
->shutdown
= bio
->shutdown
;
621 new_bio
->flags
= bio
->flags
;
623 /* This will let SSL_s_sock() work with stdin/stdout */
624 new_bio
->num
= bio
->num
;
626 if (!BIO_dup_state(bio
, (char *)new_bio
)) {
632 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO
, &new_bio
->ex_data
,
642 BIO_push(eoc
, new_bio
);
653 void BIO_copy_next_retry(BIO
*b
)
655 BIO_set_flags(b
, BIO_get_retry_flags(b
->next_bio
));
656 b
->retry_reason
= b
->next_bio
->retry_reason
;
659 int BIO_set_ex_data(BIO
*bio
, int idx
, void *data
)
661 return (CRYPTO_set_ex_data(&(bio
->ex_data
), idx
, data
));
664 void *BIO_get_ex_data(BIO
*bio
, int idx
)
666 return (CRYPTO_get_ex_data(&(bio
->ex_data
), idx
));
669 uint64_t BIO_number_read(BIO
*bio
)
672 return bio
->num_read
;
676 uint64_t BIO_number_written(BIO
*bio
)
679 return bio
->num_write
;
683 void bio_free_ex_data(BIO
*bio
)
685 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO
, bio
, &bio
->ex_data
);
688 void bio_cleanup(void)
690 #ifndef OPENSSL_NO_SOCK
691 bio_sock_cleanup_int();
692 CRYPTO_THREAD_lock_free(bio_lookup_lock
);
693 bio_lookup_lock
= NULL
;
695 CRYPTO_THREAD_lock_free(bio_type_lock
);
696 bio_type_lock
= NULL
;