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 long (*BIO_get_callback(const BIO *b)) (struct bio_st *, int, const char *,
150 void BIO_set_callback(BIO *b,
151 long (*cb) (struct bio_st *, int, const char *, int,
157 void BIO_set_callback_arg(BIO *b, char *arg)
162 char *BIO_get_callback_arg(const BIO *b)
167 const char *BIO_method_name(const BIO *b)
169 return b->method->name;
172 int BIO_method_type(const BIO *b)
174 return b->method->type;
177 int BIO_read(BIO *b, void *out, int outl)
180 long (*cb) (BIO *, int, const char *, int, long, long);
182 if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL)) {
183 BIOerr(BIO_F_BIO_READ, BIO_R_UNSUPPORTED_METHOD);
189 ((i = (int)cb(b, BIO_CB_READ, out, outl, 0L, 1L)) <= 0))
193 BIOerr(BIO_F_BIO_READ, BIO_R_UNINITIALIZED);
197 i = b->method->bread(b, out, outl);
200 b->num_read += (uint64_t)i;
203 i = (int)cb(b, BIO_CB_READ | BIO_CB_RETURN, out, outl, 0L, (long)i);
207 int BIO_write(BIO *b, const void *in, int inl)
210 long (*cb) (BIO *, int, const char *, int, long, long);
216 if ((b->method == NULL) || (b->method->bwrite == NULL)) {
217 BIOerr(BIO_F_BIO_WRITE, BIO_R_UNSUPPORTED_METHOD);
222 ((i = (int)cb(b, BIO_CB_WRITE, in, inl, 0L, 1L)) <= 0))
226 BIOerr(BIO_F_BIO_WRITE, BIO_R_UNINITIALIZED);
230 i = b->method->bwrite(b, in, inl);
233 b->num_write += (uint64_t)i;
236 i = (int)cb(b, BIO_CB_WRITE | BIO_CB_RETURN, in, inl, 0L, (long)i);
240 int BIO_puts(BIO *b, const char *in)
243 long (*cb) (BIO *, int, const char *, int, long, long);
245 if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) {
246 BIOerr(BIO_F_BIO_PUTS, BIO_R_UNSUPPORTED_METHOD);
252 if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_PUTS, in, 0, 0L, 1L)) <= 0))
256 BIOerr(BIO_F_BIO_PUTS, BIO_R_UNINITIALIZED);
260 i = b->method->bputs(b, in);
263 b->num_write += (uint64_t)i;
266 i = (int)cb(b, BIO_CB_PUTS | BIO_CB_RETURN, in, 0, 0L, (long)i);
270 int BIO_gets(BIO *b, char *in, int inl)
273 long (*cb) (BIO *, int, const char *, int, long, long);
275 if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) {
276 BIOerr(BIO_F_BIO_GETS, BIO_R_UNSUPPORTED_METHOD);
282 if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_GETS, in, inl, 0L, 1L)) <= 0))
286 BIOerr(BIO_F_BIO_GETS, BIO_R_UNINITIALIZED);
290 i = b->method->bgets(b, in, inl);
293 i = (int)cb(b, BIO_CB_GETS | BIO_CB_RETURN, in, inl, 0L, (long)i);
297 int BIO_indent(BIO *b, int indent, int max)
304 if (BIO_puts(b, " ") != 1)
309 long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
314 return (BIO_ctrl(b, cmd, larg, (char *)&i));
317 void *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
321 if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
327 long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
330 long (*cb) (BIO *, int, const char *, int, long, long);
335 if ((b->method == NULL) || (b->method->ctrl == NULL)) {
336 BIOerr(BIO_F_BIO_CTRL, BIO_R_UNSUPPORTED_METHOD);
343 ((ret = cb(b, BIO_CB_CTRL, parg, cmd, larg, 1L)) <= 0))
346 ret = b->method->ctrl(b, cmd, larg, parg);
349 ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, parg, cmd, larg, ret);
353 long BIO_callback_ctrl(BIO *b, int cmd,
354 void (*fp) (struct bio_st *, int, const char *, int,
358 long (*cb) (BIO *, int, const char *, int, long, long);
363 if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) {
364 BIOerr(BIO_F_BIO_CALLBACK_CTRL, BIO_R_UNSUPPORTED_METHOD);
371 ((ret = cb(b, BIO_CB_CTRL, (void *)&fp, cmd, 0, 1L)) <= 0))
374 ret = b->method->callback_ctrl(b, cmd, fp);
377 ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, (void *)&fp, cmd, 0, ret);
382 * It is unfortunate to duplicate in functions what the BIO_(w)pending macros
383 * do; but those macros have inappropriate return type, and for interfacing
384 * from other programming languages, C macros aren't much of a help anyway.
386 size_t BIO_ctrl_pending(BIO *bio)
388 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
391 size_t BIO_ctrl_wpending(BIO *bio)
393 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
396 /* put the 'bio' on the end of b's list of operators */
397 BIO *BIO_push(BIO *b, BIO *bio)
404 while (lb->next_bio != NULL)
409 /* called to do internal processing */
410 BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
414 /* Remove the first and return the rest */
423 BIO_ctrl(b, BIO_CTRL_POP, 0, b);
425 if (b->prev_bio != NULL)
426 b->prev_bio->next_bio = b->next_bio;
427 if (b->next_bio != NULL)
428 b->next_bio->prev_bio = b->prev_bio;
435 BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
441 if (!BIO_should_retry(b))
449 *reason = last->retry_reason;
453 int BIO_get_retry_reason(BIO *bio)
455 return (bio->retry_reason);
458 void BIO_set_retry_reason(BIO *bio, int reason)
460 bio->retry_reason = reason;
463 BIO *BIO_find_type(BIO *bio, int type)
471 if (bio->method != NULL) {
472 mt = bio->method->type;
477 } else if (mt == type)
481 } while (bio != NULL);
485 BIO *BIO_next(BIO *b)
492 void BIO_set_next(BIO *b, BIO *next)
497 void BIO_free_all(BIO *bio)
502 while (bio != NULL) {
507 /* Since ref count > 1, don't free anyone else. */
513 BIO *BIO_dup_chain(BIO *in)
515 BIO *ret = NULL, *eoc = NULL, *bio, *new_bio;
517 for (bio = in; bio != NULL; bio = bio->next_bio) {
518 if ((new_bio = BIO_new(bio->method)) == NULL)
520 new_bio->callback = bio->callback;
521 new_bio->cb_arg = bio->cb_arg;
522 new_bio->init = bio->init;
523 new_bio->shutdown = bio->shutdown;
524 new_bio->flags = bio->flags;
526 /* This will let SSL_s_sock() work with stdin/stdout */
527 new_bio->num = bio->num;
529 if (!BIO_dup_state(bio, (char *)new_bio)) {
535 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new_bio->ex_data,
545 BIO_push(eoc, new_bio);
556 void BIO_copy_next_retry(BIO *b)
558 BIO_set_flags(b, BIO_get_retry_flags(b->next_bio));
559 b->retry_reason = b->next_bio->retry_reason;
562 int BIO_set_ex_data(BIO *bio, int idx, void *data)
564 return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data));
567 void *BIO_get_ex_data(BIO *bio, int idx)
569 return (CRYPTO_get_ex_data(&(bio->ex_data), idx));
572 uint64_t BIO_number_read(BIO *bio)
575 return bio->num_read;
579 uint64_t BIO_number_written(BIO *bio)
582 return bio->num_write;
586 void bio_free_ex_data(BIO *bio)
588 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
591 void bio_cleanup(void)
593 #ifndef OPENSSL_NO_SOCK
594 bio_sock_cleanup_int();
595 CRYPTO_THREAD_lock_free(bio_lookup_lock);
596 bio_lookup_lock = NULL;