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);
97 if (method->create != NULL)
98 if (!method->create(bio)) {
99 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
112 i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_BIO);
120 fprintf(stderr, "BIO_free, bad reference count\n");
124 if ((a->callback != NULL) &&
125 ((i = (int)a->callback(a, BIO_CB_FREE, NULL, 0, 0L, 1L)) <= 0))
128 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
130 if ((a->method != NULL) && (a->method->destroy != NULL))
131 a->method->destroy(a);
136 void BIO_vfree(BIO *a)
141 void BIO_clear_flags(BIO *b, int flags)
146 int BIO_test_flags(const BIO *b, int flags)
148 return (b->flags & flags);
151 void BIO_set_flags(BIO *b, int flags)
156 long (*BIO_get_callback(const BIO *b)) (struct bio_st *, int, const char *,
161 void BIO_set_callback(BIO *b,
162 long (*cb) (struct bio_st *, int, const char *, int,
168 void BIO_set_callback_arg(BIO *b, char *arg)
173 char *BIO_get_callback_arg(const BIO *b)
178 const char *BIO_method_name(const BIO *b)
180 return b->method->name;
183 int BIO_method_type(const BIO *b)
185 return b->method->type;
188 int BIO_read(BIO *b, void *out, int outl)
191 long (*cb) (BIO *, int, const char *, int, long, long);
193 if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL)) {
194 BIOerr(BIO_F_BIO_READ, BIO_R_UNSUPPORTED_METHOD);
200 ((i = (int)cb(b, BIO_CB_READ, out, outl, 0L, 1L)) <= 0))
204 BIOerr(BIO_F_BIO_READ, BIO_R_UNINITIALIZED);
208 i = b->method->bread(b, out, outl);
211 b->num_read += (uint64_t)i;
214 i = (int)cb(b, BIO_CB_READ | BIO_CB_RETURN, out, outl, 0L, (long)i);
218 int BIO_write(BIO *b, const void *in, int inl)
221 long (*cb) (BIO *, int, const char *, int, long, long);
227 if ((b->method == NULL) || (b->method->bwrite == NULL)) {
228 BIOerr(BIO_F_BIO_WRITE, BIO_R_UNSUPPORTED_METHOD);
233 ((i = (int)cb(b, BIO_CB_WRITE, in, inl, 0L, 1L)) <= 0))
237 BIOerr(BIO_F_BIO_WRITE, BIO_R_UNINITIALIZED);
241 i = b->method->bwrite(b, in, inl);
244 b->num_write += (uint64_t)i;
247 i = (int)cb(b, BIO_CB_WRITE | BIO_CB_RETURN, in, inl, 0L, (long)i);
251 int BIO_puts(BIO *b, const char *in)
254 long (*cb) (BIO *, int, const char *, int, long, long);
256 if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) {
257 BIOerr(BIO_F_BIO_PUTS, BIO_R_UNSUPPORTED_METHOD);
263 if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_PUTS, in, 0, 0L, 1L)) <= 0))
267 BIOerr(BIO_F_BIO_PUTS, BIO_R_UNINITIALIZED);
271 i = b->method->bputs(b, in);
274 b->num_write += (uint64_t)i;
277 i = (int)cb(b, BIO_CB_PUTS | BIO_CB_RETURN, in, 0, 0L, (long)i);
281 int BIO_gets(BIO *b, char *in, int inl)
284 long (*cb) (BIO *, int, const char *, int, long, long);
286 if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) {
287 BIOerr(BIO_F_BIO_GETS, BIO_R_UNSUPPORTED_METHOD);
293 if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_GETS, in, inl, 0L, 1L)) <= 0))
297 BIOerr(BIO_F_BIO_GETS, BIO_R_UNINITIALIZED);
301 i = b->method->bgets(b, in, inl);
304 i = (int)cb(b, BIO_CB_GETS | BIO_CB_RETURN, in, inl, 0L, (long)i);
308 int BIO_indent(BIO *b, int indent, int max)
315 if (BIO_puts(b, " ") != 1)
320 long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
325 return (BIO_ctrl(b, cmd, larg, (char *)&i));
328 void *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
332 if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
338 long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
341 long (*cb) (BIO *, int, const char *, int, long, long);
346 if ((b->method == NULL) || (b->method->ctrl == NULL)) {
347 BIOerr(BIO_F_BIO_CTRL, BIO_R_UNSUPPORTED_METHOD);
354 ((ret = cb(b, BIO_CB_CTRL, parg, cmd, larg, 1L)) <= 0))
357 ret = b->method->ctrl(b, cmd, larg, parg);
360 ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, parg, cmd, larg, ret);
364 long BIO_callback_ctrl(BIO *b, int cmd,
365 void (*fp) (struct bio_st *, int, const char *, int,
369 long (*cb) (BIO *, int, const char *, int, long, long);
374 if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) {
375 BIOerr(BIO_F_BIO_CALLBACK_CTRL, BIO_R_UNSUPPORTED_METHOD);
382 ((ret = cb(b, BIO_CB_CTRL, (void *)&fp, cmd, 0, 1L)) <= 0))
385 ret = b->method->callback_ctrl(b, cmd, fp);
388 ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, (void *)&fp, cmd, 0, ret);
393 * It is unfortunate to duplicate in functions what the BIO_(w)pending macros
394 * do; but those macros have inappropriate return type, and for interfacing
395 * from other programming languages, C macros aren't much of a help anyway.
397 size_t BIO_ctrl_pending(BIO *bio)
399 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
402 size_t BIO_ctrl_wpending(BIO *bio)
404 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
407 /* put the 'bio' on the end of b's list of operators */
408 BIO *BIO_push(BIO *b, BIO *bio)
415 while (lb->next_bio != NULL)
420 /* called to do internal processing */
421 BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
425 /* Remove the first and return the rest */
434 BIO_ctrl(b, BIO_CTRL_POP, 0, b);
436 if (b->prev_bio != NULL)
437 b->prev_bio->next_bio = b->next_bio;
438 if (b->next_bio != NULL)
439 b->next_bio->prev_bio = b->prev_bio;
446 BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
452 if (!BIO_should_retry(b))
460 *reason = last->retry_reason;
464 int BIO_get_retry_reason(BIO *bio)
466 return (bio->retry_reason);
469 BIO *BIO_find_type(BIO *bio, int type)
477 if (bio->method != NULL) {
478 mt = bio->method->type;
483 } else if (mt == type)
487 } while (bio != NULL);
491 BIO *BIO_next(BIO *b)
498 void BIO_free_all(BIO *bio)
503 while (bio != NULL) {
508 /* Since ref count > 1, don't free anyone else. */
514 BIO *BIO_dup_chain(BIO *in)
516 BIO *ret = NULL, *eoc = NULL, *bio, *new_bio;
518 for (bio = in; bio != NULL; bio = bio->next_bio) {
519 if ((new_bio = BIO_new(bio->method)) == NULL)
521 new_bio->callback = bio->callback;
522 new_bio->cb_arg = bio->cb_arg;
523 new_bio->init = bio->init;
524 new_bio->shutdown = bio->shutdown;
525 new_bio->flags = bio->flags;
527 /* This will let SSL_s_sock() work with stdin/stdout */
528 new_bio->num = bio->num;
530 if (!BIO_dup_state(bio, (char *)new_bio)) {
536 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new_bio->ex_data,
546 BIO_push(eoc, new_bio);
557 void BIO_copy_next_retry(BIO *b)
559 BIO_set_flags(b, BIO_get_retry_flags(b->next_bio));
560 b->retry_reason = b->next_bio->retry_reason;
563 int BIO_set_ex_data(BIO *bio, int idx, void *data)
565 return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data));
568 void *BIO_get_ex_data(BIO *bio, int idx)
570 return (CRYPTO_get_ex_data(&(bio->ex_data), idx));
573 uint64_t BIO_number_read(BIO *bio)
576 return bio->num_read;
580 uint64_t BIO_number_written(BIO *bio)
583 return bio->num_write;