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>
63 #include <openssl/bio.h>
64 #include <openssl/stack.h>
66 BIO *BIO_new(BIO_METHOD *method)
70 ret = (BIO *)OPENSSL_malloc(sizeof(BIO));
72 BIOerr(BIO_F_BIO_NEW, ERR_R_MALLOC_FAILURE);
75 if (!BIO_set(ret, method)) {
82 int BIO_set(BIO *bio, BIO_METHOD *method)
90 bio->retry_reason = 0;
98 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
99 if (method->create != NULL)
100 if (!method->create(bio)) {
101 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
114 i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_BIO);
122 fprintf(stderr, "BIO_free, bad reference count\n");
126 if ((a->callback != NULL) &&
127 ((i = (int)a->callback(a, BIO_CB_FREE, NULL, 0, 0L, 1L)) <= 0))
130 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
132 if ((a->method != NULL) && (a->method->destroy != NULL))
133 a->method->destroy(a);
138 void BIO_vfree(BIO *a)
143 void BIO_clear_flags(BIO *b, int flags)
148 int BIO_test_flags(const BIO *b, int flags)
150 return (b->flags & flags);
153 void BIO_set_flags(BIO *b, int flags)
158 long (*BIO_get_callback(const BIO *b)) (struct bio_st *, int, const char *,
163 void BIO_set_callback(BIO *b,
164 long (*cb) (struct bio_st *, int, const char *, int,
170 void BIO_set_callback_arg(BIO *b, char *arg)
175 char *BIO_get_callback_arg(const BIO *b)
180 const char *BIO_method_name(const BIO *b)
182 return b->method->name;
185 int BIO_method_type(const BIO *b)
187 return b->method->type;
190 int BIO_read(BIO *b, void *out, int outl)
193 long (*cb) (BIO *, int, const char *, int, long, long);
195 if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL)) {
196 BIOerr(BIO_F_BIO_READ, BIO_R_UNSUPPORTED_METHOD);
202 ((i = (int)cb(b, BIO_CB_READ, out, outl, 0L, 1L)) <= 0))
206 BIOerr(BIO_F_BIO_READ, BIO_R_UNINITIALIZED);
210 i = b->method->bread(b, out, outl);
213 b->num_read += (unsigned long)i;
216 i = (int)cb(b, BIO_CB_READ | BIO_CB_RETURN, out, outl, 0L, (long)i);
220 int BIO_write(BIO *b, const void *in, int inl)
223 long (*cb) (BIO *, int, const char *, int, long, long);
229 if ((b->method == NULL) || (b->method->bwrite == NULL)) {
230 BIOerr(BIO_F_BIO_WRITE, BIO_R_UNSUPPORTED_METHOD);
235 ((i = (int)cb(b, BIO_CB_WRITE, in, inl, 0L, 1L)) <= 0))
239 BIOerr(BIO_F_BIO_WRITE, BIO_R_UNINITIALIZED);
243 i = b->method->bwrite(b, in, inl);
246 b->num_write += (unsigned long)i;
249 i = (int)cb(b, BIO_CB_WRITE | BIO_CB_RETURN, in, inl, 0L, (long)i);
253 int BIO_puts(BIO *b, const char *in)
256 long (*cb) (BIO *, int, const char *, int, long, long);
258 if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) {
259 BIOerr(BIO_F_BIO_PUTS, BIO_R_UNSUPPORTED_METHOD);
265 if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_PUTS, in, 0, 0L, 1L)) <= 0))
269 BIOerr(BIO_F_BIO_PUTS, BIO_R_UNINITIALIZED);
273 i = b->method->bputs(b, in);
276 b->num_write += (unsigned long)i;
279 i = (int)cb(b, BIO_CB_PUTS | BIO_CB_RETURN, in, 0, 0L, (long)i);
283 int BIO_gets(BIO *b, char *in, int inl)
286 long (*cb) (BIO *, int, const char *, int, long, long);
288 if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) {
289 BIOerr(BIO_F_BIO_GETS, BIO_R_UNSUPPORTED_METHOD);
295 if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_GETS, in, inl, 0L, 1L)) <= 0))
299 BIOerr(BIO_F_BIO_GETS, BIO_R_UNINITIALIZED);
303 i = b->method->bgets(b, in, inl);
306 i = (int)cb(b, BIO_CB_GETS | BIO_CB_RETURN, in, inl, 0L, (long)i);
310 int BIO_indent(BIO *b, int indent, int max)
317 if (BIO_puts(b, " ") != 1)
322 long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
327 return (BIO_ctrl(b, cmd, larg, (char *)&i));
330 char *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
334 if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
340 long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
343 long (*cb) (BIO *, int, const char *, int, long, long);
348 if ((b->method == NULL) || (b->method->ctrl == NULL)) {
349 BIOerr(BIO_F_BIO_CTRL, BIO_R_UNSUPPORTED_METHOD);
356 ((ret = cb(b, BIO_CB_CTRL, parg, cmd, larg, 1L)) <= 0))
359 ret = b->method->ctrl(b, cmd, larg, parg);
362 ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, parg, cmd, larg, ret);
366 long BIO_callback_ctrl(BIO *b, int cmd,
367 void (*fp) (struct bio_st *, int, const char *, int,
371 long (*cb) (BIO *, int, const char *, int, long, long);
376 if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) {
377 BIOerr(BIO_F_BIO_CALLBACK_CTRL, BIO_R_UNSUPPORTED_METHOD);
384 ((ret = cb(b, BIO_CB_CTRL, (void *)&fp, cmd, 0, 1L)) <= 0))
387 ret = b->method->callback_ctrl(b, cmd, fp);
390 ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, (void *)&fp, cmd, 0, ret);
395 * It is unfortunate to duplicate in functions what the BIO_(w)pending macros
396 * do; but those macros have inappropriate return type, and for interfacing
397 * from other programming languages, C macros aren't much of a help anyway.
399 size_t BIO_ctrl_pending(BIO *bio)
401 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
404 size_t BIO_ctrl_wpending(BIO *bio)
406 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
409 /* put the 'bio' on the end of b's list of operators */
410 BIO *BIO_push(BIO *b, BIO *bio)
417 while (lb->next_bio != NULL)
422 /* called to do internal processing */
423 BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
427 /* Remove the first and return the rest */
436 BIO_ctrl(b, BIO_CTRL_POP, 0, b);
438 if (b->prev_bio != NULL)
439 b->prev_bio->next_bio = b->next_bio;
440 if (b->next_bio != NULL)
441 b->next_bio->prev_bio = b->prev_bio;
448 BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
454 if (!BIO_should_retry(b))
462 *reason = last->retry_reason;
466 int BIO_get_retry_reason(BIO *bio)
468 return (bio->retry_reason);
471 BIO *BIO_find_type(BIO *bio, int type)
479 if (bio->method != NULL) {
480 mt = bio->method->type;
485 } else if (mt == type)
489 } while (bio != NULL);
493 BIO *BIO_next(BIO *b)
500 void BIO_free_all(BIO *bio)
505 while (bio != NULL) {
510 /* Since ref count > 1, don't free anyone else. */
516 BIO *BIO_dup_chain(BIO *in)
518 BIO *ret = NULL, *eoc = NULL, *bio, *new_bio;
520 for (bio = in; bio != NULL; bio = bio->next_bio) {
521 if ((new_bio = BIO_new(bio->method)) == NULL)
523 new_bio->callback = bio->callback;
524 new_bio->cb_arg = bio->cb_arg;
525 new_bio->init = bio->init;
526 new_bio->shutdown = bio->shutdown;
527 new_bio->flags = bio->flags;
529 /* This will let SSL_s_sock() work with stdin/stdout */
530 new_bio->num = bio->num;
532 if (!BIO_dup_state(bio, (char *)new_bio)) {
538 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new_bio->ex_data,
548 BIO_push(eoc, new_bio);
559 void BIO_copy_next_retry(BIO *b)
561 BIO_set_flags(b, BIO_get_retry_flags(b->next_bio));
562 b->retry_reason = b->next_bio->retry_reason;
565 int BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
566 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
568 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp,
569 new_func, dup_func, free_func);
572 int BIO_set_ex_data(BIO *bio, int idx, void *data)
574 return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data));
577 void *BIO_get_ex_data(BIO *bio, int idx)
579 return (CRYPTO_get_ex_data(&(bio->ex_data), idx));
582 unsigned long BIO_number_read(BIO *bio)
585 return bio->num_read;
589 unsigned long BIO_number_written(BIO *bio)
592 return bio->num_write;
596 IMPLEMENT_STACK_OF(BIO)