1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
60 #include <openssl/crypto.h>
61 #include "internal/cryptlib.h"
62 #include <openssl/bio.h>
63 #include <openssl/stack.h>
65 BIO *BIO_new(BIO_METHOD *method)
67 BIO *ret = OPENSSL_malloc(sizeof(*ret));
70 BIOerr(BIO_F_BIO_NEW, ERR_R_MALLOC_FAILURE);
73 if (!BIO_set(ret, method)) {
80 int BIO_set(BIO *bio, BIO_METHOD *method)
88 bio->retry_reason = 0;
96 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
98 bio->lock = CRYPTO_THREAD_lock_new();
99 if (bio->lock == NULL) {
100 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
104 if (method->create != NULL) {
105 if (!method->create(bio)) {
106 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
107 CRYPTO_THREAD_lock_free(bio->lock);
122 if (CRYPTO_atomic_add(&a->references, -1, &i, a->lock) <= 0)
125 REF_PRINT_COUNT("BIO", a);
128 REF_ASSERT_ISNT(i < 0);
129 if ((a->callback != NULL) &&
130 ((i = (int)a->callback(a, BIO_CB_FREE, NULL, 0, 0L, 1L)) <= 0))
133 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
135 CRYPTO_THREAD_lock_free(a->lock);
137 if ((a->method != NULL) && (a->method->destroy != NULL))
138 a->method->destroy(a);
145 void BIO_vfree(BIO *a)
150 int BIO_up_ref(BIO *a)
154 if (CRYPTO_atomic_add(&a->references, 1, &i, a->lock) <= 0)
157 REF_PRINT_COUNT("BIO", a);
158 REF_ASSERT_ISNT(i < 2);
159 return ((i > 1) ? 1 : 0);
162 void BIO_clear_flags(BIO *b, int flags)
167 int BIO_test_flags(const BIO *b, int flags)
169 return (b->flags & flags);
172 void BIO_set_flags(BIO *b, int flags)
177 long (*BIO_get_callback(const BIO *b)) (struct bio_st *, int, const char *,
182 void BIO_set_callback(BIO *b,
183 long (*cb) (struct bio_st *, int, const char *, int,
189 void BIO_set_callback_arg(BIO *b, char *arg)
194 char *BIO_get_callback_arg(const BIO *b)
199 const char *BIO_method_name(const BIO *b)
201 return b->method->name;
204 int BIO_method_type(const BIO *b)
206 return b->method->type;
209 int BIO_read(BIO *b, void *out, int outl)
212 long (*cb) (BIO *, int, const char *, int, long, long);
214 if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL)) {
215 BIOerr(BIO_F_BIO_READ, BIO_R_UNSUPPORTED_METHOD);
221 ((i = (int)cb(b, BIO_CB_READ, out, outl, 0L, 1L)) <= 0))
225 BIOerr(BIO_F_BIO_READ, BIO_R_UNINITIALIZED);
229 i = b->method->bread(b, out, outl);
232 b->num_read += (uint64_t)i;
235 i = (int)cb(b, BIO_CB_READ | BIO_CB_RETURN, out, outl, 0L, (long)i);
239 int BIO_write(BIO *b, const void *in, int inl)
242 long (*cb) (BIO *, int, const char *, int, long, long);
248 if ((b->method == NULL) || (b->method->bwrite == NULL)) {
249 BIOerr(BIO_F_BIO_WRITE, BIO_R_UNSUPPORTED_METHOD);
254 ((i = (int)cb(b, BIO_CB_WRITE, in, inl, 0L, 1L)) <= 0))
258 BIOerr(BIO_F_BIO_WRITE, BIO_R_UNINITIALIZED);
262 i = b->method->bwrite(b, in, inl);
265 b->num_write += (uint64_t)i;
268 i = (int)cb(b, BIO_CB_WRITE | BIO_CB_RETURN, in, inl, 0L, (long)i);
272 int BIO_puts(BIO *b, const char *in)
275 long (*cb) (BIO *, int, const char *, int, long, long);
277 if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) {
278 BIOerr(BIO_F_BIO_PUTS, BIO_R_UNSUPPORTED_METHOD);
284 if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_PUTS, in, 0, 0L, 1L)) <= 0))
288 BIOerr(BIO_F_BIO_PUTS, BIO_R_UNINITIALIZED);
292 i = b->method->bputs(b, in);
295 b->num_write += (uint64_t)i;
298 i = (int)cb(b, BIO_CB_PUTS | BIO_CB_RETURN, in, 0, 0L, (long)i);
302 int BIO_gets(BIO *b, char *in, int inl)
305 long (*cb) (BIO *, int, const char *, int, long, long);
307 if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) {
308 BIOerr(BIO_F_BIO_GETS, BIO_R_UNSUPPORTED_METHOD);
314 if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_GETS, in, inl, 0L, 1L)) <= 0))
318 BIOerr(BIO_F_BIO_GETS, BIO_R_UNINITIALIZED);
322 i = b->method->bgets(b, in, inl);
325 i = (int)cb(b, BIO_CB_GETS | BIO_CB_RETURN, in, inl, 0L, (long)i);
329 int BIO_indent(BIO *b, int indent, int max)
336 if (BIO_puts(b, " ") != 1)
341 long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
346 return (BIO_ctrl(b, cmd, larg, (char *)&i));
349 void *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
353 if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
359 long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
362 long (*cb) (BIO *, int, const char *, int, long, long);
367 if ((b->method == NULL) || (b->method->ctrl == NULL)) {
368 BIOerr(BIO_F_BIO_CTRL, BIO_R_UNSUPPORTED_METHOD);
375 ((ret = cb(b, BIO_CB_CTRL, parg, cmd, larg, 1L)) <= 0))
378 ret = b->method->ctrl(b, cmd, larg, parg);
381 ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, parg, cmd, larg, ret);
385 long BIO_callback_ctrl(BIO *b, int cmd,
386 void (*fp) (struct bio_st *, int, const char *, int,
390 long (*cb) (BIO *, int, const char *, int, long, long);
395 if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) {
396 BIOerr(BIO_F_BIO_CALLBACK_CTRL, BIO_R_UNSUPPORTED_METHOD);
403 ((ret = cb(b, BIO_CB_CTRL, (void *)&fp, cmd, 0, 1L)) <= 0))
406 ret = b->method->callback_ctrl(b, cmd, fp);
409 ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, (void *)&fp, cmd, 0, ret);
414 * It is unfortunate to duplicate in functions what the BIO_(w)pending macros
415 * do; but those macros have inappropriate return type, and for interfacing
416 * from other programming languages, C macros aren't much of a help anyway.
418 size_t BIO_ctrl_pending(BIO *bio)
420 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
423 size_t BIO_ctrl_wpending(BIO *bio)
425 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
428 /* put the 'bio' on the end of b's list of operators */
429 BIO *BIO_push(BIO *b, BIO *bio)
436 while (lb->next_bio != NULL)
441 /* called to do internal processing */
442 BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
446 /* Remove the first and return the rest */
455 BIO_ctrl(b, BIO_CTRL_POP, 0, b);
457 if (b->prev_bio != NULL)
458 b->prev_bio->next_bio = b->next_bio;
459 if (b->next_bio != NULL)
460 b->next_bio->prev_bio = b->prev_bio;
467 BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
473 if (!BIO_should_retry(b))
481 *reason = last->retry_reason;
485 int BIO_get_retry_reason(BIO *bio)
487 return (bio->retry_reason);
490 BIO *BIO_find_type(BIO *bio, int type)
498 if (bio->method != NULL) {
499 mt = bio->method->type;
504 } else if (mt == type)
508 } while (bio != NULL);
512 BIO *BIO_next(BIO *b)
519 void BIO_free_all(BIO *bio)
524 while (bio != NULL) {
529 /* Since ref count > 1, don't free anyone else. */
535 BIO *BIO_dup_chain(BIO *in)
537 BIO *ret = NULL, *eoc = NULL, *bio, *new_bio;
539 for (bio = in; bio != NULL; bio = bio->next_bio) {
540 if ((new_bio = BIO_new(bio->method)) == NULL)
542 new_bio->callback = bio->callback;
543 new_bio->cb_arg = bio->cb_arg;
544 new_bio->init = bio->init;
545 new_bio->shutdown = bio->shutdown;
546 new_bio->flags = bio->flags;
548 /* This will let SSL_s_sock() work with stdin/stdout */
549 new_bio->num = bio->num;
551 if (!BIO_dup_state(bio, (char *)new_bio)) {
557 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new_bio->ex_data,
567 BIO_push(eoc, new_bio);
578 void BIO_copy_next_retry(BIO *b)
580 BIO_set_flags(b, BIO_get_retry_flags(b->next_bio));
581 b->retry_reason = b->next_bio->retry_reason;
584 int BIO_set_ex_data(BIO *bio, int idx, void *data)
586 return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data));
589 void *BIO_get_ex_data(BIO *bio, int idx)
591 return (CRYPTO_get_ex_data(&(bio->ex_data), idx));
594 uint64_t BIO_number_read(BIO *bio)
597 return bio->num_read;
601 uint64_t BIO_number_written(BIO *bio)
604 return bio->num_write;