]>
git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/bio/bio_lib.c
1 /* crypto/bio/bio_lib.c */
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.]
61 #include <openssl/crypto.h>
62 #include "internal/cryptlib.h"
63 #include <openssl/bio.h>
64 #include <openssl/stack.h>
66 BIO
*BIO_new(BIO_METHOD
*method
)
68 BIO
*ret
= OPENSSL_malloc(sizeof(*ret
));
71 BIOerr(BIO_F_BIO_NEW
, ERR_R_MALLOC_FAILURE
);
74 if (!BIO_set(ret
, method
)) {
81 int BIO_set(BIO
*bio
, BIO_METHOD
*method
)
89 bio
->retry_reason
= 0;
97 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO
, bio
, &bio
->ex_data
);
98 if (method
->create
!= NULL
)
99 if (!method
->create(bio
)) {
100 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO
, bio
, &bio
->ex_data
);
113 i
= CRYPTO_add(&a
->references
, -1, CRYPTO_LOCK_BIO
);
121 fprintf(stderr
, "BIO_free, bad reference count\n");
125 if ((a
->callback
!= NULL
) &&
126 ((i
= (int)a
->callback(a
, BIO_CB_FREE
, NULL
, 0, 0L, 1L)) <= 0))
129 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO
, a
, &a
->ex_data
);
131 if ((a
->method
!= NULL
) && (a
->method
->destroy
!= NULL
))
132 a
->method
->destroy(a
);
137 void BIO_vfree(BIO
*a
)
142 void BIO_clear_flags(BIO
*b
, int flags
)
147 int BIO_test_flags(const BIO
*b
, int flags
)
149 return (b
->flags
& flags
);
152 void BIO_set_flags(BIO
*b
, int flags
)
157 long (*BIO_get_callback(const BIO
*b
)) (struct bio_st
*, int, const char *,
162 void BIO_set_callback(BIO
*b
,
163 long (*cb
) (struct bio_st
*, int, const char *, int,
169 void BIO_set_callback_arg(BIO
*b
, char *arg
)
174 char *BIO_get_callback_arg(const BIO
*b
)
179 const char *BIO_method_name(const BIO
*b
)
181 return b
->method
->name
;
184 int BIO_method_type(const BIO
*b
)
186 return b
->method
->type
;
189 int BIO_read(BIO
*b
, void *out
, int outl
)
192 long (*cb
) (BIO
*, int, const char *, int, long, long);
194 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bread
== NULL
)) {
195 BIOerr(BIO_F_BIO_READ
, BIO_R_UNSUPPORTED_METHOD
);
201 ((i
= (int)cb(b
, BIO_CB_READ
, out
, outl
, 0L, 1L)) <= 0))
205 BIOerr(BIO_F_BIO_READ
, BIO_R_UNINITIALIZED
);
209 i
= b
->method
->bread(b
, out
, outl
);
212 b
->num_read
+= (uint64_t)i
;
215 i
= (int)cb(b
, BIO_CB_READ
| BIO_CB_RETURN
, out
, outl
, 0L, (long)i
);
219 int BIO_write(BIO
*b
, const void *in
, int inl
)
222 long (*cb
) (BIO
*, int, const char *, int, long, long);
228 if ((b
->method
== NULL
) || (b
->method
->bwrite
== NULL
)) {
229 BIOerr(BIO_F_BIO_WRITE
, BIO_R_UNSUPPORTED_METHOD
);
234 ((i
= (int)cb(b
, BIO_CB_WRITE
, in
, inl
, 0L, 1L)) <= 0))
238 BIOerr(BIO_F_BIO_WRITE
, BIO_R_UNINITIALIZED
);
242 i
= b
->method
->bwrite(b
, in
, inl
);
245 b
->num_write
+= (uint64_t)i
;
248 i
= (int)cb(b
, BIO_CB_WRITE
| BIO_CB_RETURN
, in
, inl
, 0L, (long)i
);
252 int BIO_puts(BIO
*b
, const char *in
)
255 long (*cb
) (BIO
*, int, const char *, int, long, long);
257 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bputs
== NULL
)) {
258 BIOerr(BIO_F_BIO_PUTS
, BIO_R_UNSUPPORTED_METHOD
);
264 if ((cb
!= NULL
) && ((i
= (int)cb(b
, BIO_CB_PUTS
, in
, 0, 0L, 1L)) <= 0))
268 BIOerr(BIO_F_BIO_PUTS
, BIO_R_UNINITIALIZED
);
272 i
= b
->method
->bputs(b
, in
);
275 b
->num_write
+= (uint64_t)i
;
278 i
= (int)cb(b
, BIO_CB_PUTS
| BIO_CB_RETURN
, in
, 0, 0L, (long)i
);
282 int BIO_gets(BIO
*b
, char *in
, int inl
)
285 long (*cb
) (BIO
*, int, const char *, int, long, long);
287 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bgets
== NULL
)) {
288 BIOerr(BIO_F_BIO_GETS
, BIO_R_UNSUPPORTED_METHOD
);
294 if ((cb
!= NULL
) && ((i
= (int)cb(b
, BIO_CB_GETS
, in
, inl
, 0L, 1L)) <= 0))
298 BIOerr(BIO_F_BIO_GETS
, BIO_R_UNINITIALIZED
);
302 i
= b
->method
->bgets(b
, in
, inl
);
305 i
= (int)cb(b
, BIO_CB_GETS
| BIO_CB_RETURN
, in
, inl
, 0L, (long)i
);
309 int BIO_indent(BIO
*b
, int indent
, int max
)
316 if (BIO_puts(b
, " ") != 1)
321 long BIO_int_ctrl(BIO
*b
, int cmd
, long larg
, int iarg
)
326 return (BIO_ctrl(b
, cmd
, larg
, (char *)&i
));
329 char *BIO_ptr_ctrl(BIO
*b
, int cmd
, long larg
)
333 if (BIO_ctrl(b
, cmd
, larg
, (char *)&p
) <= 0)
339 long BIO_ctrl(BIO
*b
, int cmd
, long larg
, void *parg
)
342 long (*cb
) (BIO
*, int, const char *, int, long, long);
347 if ((b
->method
== NULL
) || (b
->method
->ctrl
== NULL
)) {
348 BIOerr(BIO_F_BIO_CTRL
, BIO_R_UNSUPPORTED_METHOD
);
355 ((ret
= cb(b
, BIO_CB_CTRL
, parg
, cmd
, larg
, 1L)) <= 0))
358 ret
= b
->method
->ctrl(b
, cmd
, larg
, parg
);
361 ret
= cb(b
, BIO_CB_CTRL
| BIO_CB_RETURN
, parg
, cmd
, larg
, ret
);
365 long BIO_callback_ctrl(BIO
*b
, int cmd
,
366 void (*fp
) (struct bio_st
*, int, const char *, int,
370 long (*cb
) (BIO
*, int, const char *, int, long, long);
375 if ((b
->method
== NULL
) || (b
->method
->callback_ctrl
== NULL
)) {
376 BIOerr(BIO_F_BIO_CALLBACK_CTRL
, BIO_R_UNSUPPORTED_METHOD
);
383 ((ret
= cb(b
, BIO_CB_CTRL
, (void *)&fp
, cmd
, 0, 1L)) <= 0))
386 ret
= b
->method
->callback_ctrl(b
, cmd
, fp
);
389 ret
= cb(b
, BIO_CB_CTRL
| BIO_CB_RETURN
, (void *)&fp
, cmd
, 0, ret
);
394 * It is unfortunate to duplicate in functions what the BIO_(w)pending macros
395 * do; but those macros have inappropriate return type, and for interfacing
396 * from other programming languages, C macros aren't much of a help anyway.
398 size_t BIO_ctrl_pending(BIO
*bio
)
400 return BIO_ctrl(bio
, BIO_CTRL_PENDING
, 0, NULL
);
403 size_t BIO_ctrl_wpending(BIO
*bio
)
405 return BIO_ctrl(bio
, BIO_CTRL_WPENDING
, 0, NULL
);
408 /* put the 'bio' on the end of b's list of operators */
409 BIO
*BIO_push(BIO
*b
, BIO
*bio
)
416 while (lb
->next_bio
!= NULL
)
421 /* called to do internal processing */
422 BIO_ctrl(b
, BIO_CTRL_PUSH
, 0, lb
);
426 /* Remove the first and return the rest */
435 BIO_ctrl(b
, BIO_CTRL_POP
, 0, b
);
437 if (b
->prev_bio
!= NULL
)
438 b
->prev_bio
->next_bio
= b
->next_bio
;
439 if (b
->next_bio
!= NULL
)
440 b
->next_bio
->prev_bio
= b
->prev_bio
;
447 BIO
*BIO_get_retry_BIO(BIO
*bio
, int *reason
)
453 if (!BIO_should_retry(b
))
461 *reason
= last
->retry_reason
;
465 int BIO_get_retry_reason(BIO
*bio
)
467 return (bio
->retry_reason
);
470 BIO
*BIO_find_type(BIO
*bio
, int type
)
478 if (bio
->method
!= NULL
) {
479 mt
= bio
->method
->type
;
484 } else if (mt
== type
)
488 } while (bio
!= NULL
);
492 BIO
*BIO_next(BIO
*b
)
499 void BIO_free_all(BIO
*bio
)
504 while (bio
!= NULL
) {
509 /* Since ref count > 1, don't free anyone else. */
515 BIO
*BIO_dup_chain(BIO
*in
)
517 BIO
*ret
= NULL
, *eoc
= NULL
, *bio
, *new_bio
;
519 for (bio
= in
; bio
!= NULL
; bio
= bio
->next_bio
) {
520 if ((new_bio
= BIO_new(bio
->method
)) == NULL
)
522 new_bio
->callback
= bio
->callback
;
523 new_bio
->cb_arg
= bio
->cb_arg
;
524 new_bio
->init
= bio
->init
;
525 new_bio
->shutdown
= bio
->shutdown
;
526 new_bio
->flags
= bio
->flags
;
528 /* This will let SSL_s_sock() work with stdin/stdout */
529 new_bio
->num
= bio
->num
;
531 if (!BIO_dup_state(bio
, (char *)new_bio
)) {
537 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO
, &new_bio
->ex_data
,
547 BIO_push(eoc
, new_bio
);
558 void BIO_copy_next_retry(BIO
*b
)
560 BIO_set_flags(b
, BIO_get_retry_flags(b
->next_bio
));
561 b
->retry_reason
= b
->next_bio
->retry_reason
;
564 int BIO_get_ex_new_index(long argl
, void *argp
, CRYPTO_EX_new
*new_func
,
565 CRYPTO_EX_dup
*dup_func
, CRYPTO_EX_free
*free_func
)
567 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO
, argl
, argp
,
568 new_func
, dup_func
, free_func
);
571 int BIO_set_ex_data(BIO
*bio
, int idx
, void *data
)
573 return (CRYPTO_set_ex_data(&(bio
->ex_data
), idx
, data
));
576 void *BIO_get_ex_data(BIO
*bio
, int idx
)
578 return (CRYPTO_get_ex_data(&(bio
->ex_data
), idx
));
581 uint64_t BIO_number_read(BIO
*bio
)
584 return bio
->num_read
;
588 uint64_t BIO_number_written(BIO
*bio
)
591 return bio
->num_write
;