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-rw-r--r--src/lib/libcrypto/bio/bio_lib.c624
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diff --git a/src/lib/libcrypto/bio/bio_lib.c b/src/lib/libcrypto/bio/bio_lib.c
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1/* $OpenBSD: bio_lib.c,v 1.22 2015/02/10 11:22:21 jsing Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59#include <errno.h>
60#include <stdio.h>
61
62#include <openssl/bio.h>
63#include <openssl/crypto.h>
64#include <openssl/err.h>
65#include <openssl/stack.h>
66
67BIO *
68BIO_new(BIO_METHOD *method)
69{
70 BIO *ret = NULL;
71
72 ret = malloc(sizeof(BIO));
73 if (ret == NULL) {
74 BIOerr(BIO_F_BIO_NEW, ERR_R_MALLOC_FAILURE);
75 return (NULL);
76 }
77 if (!BIO_set(ret, method)) {
78 free(ret);
79 ret = NULL;
80 }
81 return (ret);
82}
83
84int
85BIO_set(BIO *bio, BIO_METHOD *method)
86{
87 bio->method = method;
88 bio->callback = NULL;
89 bio->cb_arg = NULL;
90 bio->init = 0;
91 bio->shutdown = 1;
92 bio->flags = 0;
93 bio->retry_reason = 0;
94 bio->num = 0;
95 bio->ptr = NULL;
96 bio->prev_bio = NULL;
97 bio->next_bio = NULL;
98 bio->references = 1;
99 bio->num_read = 0L;
100 bio->num_write = 0L;
101 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
102 if (method->create != NULL)
103 if (!method->create(bio)) {
104 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio,
105 &bio->ex_data);
106 return (0);
107 }
108 return (1);
109}
110
111int
112BIO_free(BIO *a)
113{
114 int i;
115
116 if (a == NULL)
117 return (0);
118
119 i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_BIO);
120 if (i > 0)
121 return (1);
122 if ((a->callback != NULL) &&
123 ((i = (int)a->callback(a, BIO_CB_FREE, NULL, 0, 0L, 1L)) <= 0))
124 return (i);
125
126 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
127
128 if (a->method != NULL && a->method->destroy != NULL)
129 a->method->destroy(a);
130 free(a);
131 return (1);
132}
133
134void
135BIO_vfree(BIO *a)
136{
137 BIO_free(a);
138}
139
140void
141BIO_clear_flags(BIO *b, int flags)
142{
143 b->flags &= ~flags;
144}
145
146int
147BIO_test_flags(const BIO *b, int flags)
148{
149 return (b->flags & flags);
150}
151
152void
153BIO_set_flags(BIO *b, int flags)
154{
155 b->flags |= flags;
156}
157
158long
159(*BIO_get_callback(const BIO *b))(struct bio_st *, int, const char *, int,
160 long, long)
161{
162 return b->callback;
163}
164
165void
166BIO_set_callback(BIO *b, long (*cb)(struct bio_st *, int, const char *, int,
167 long, long))
168{
169 b->callback = cb;
170}
171
172void
173BIO_set_callback_arg(BIO *b, char *arg)
174{
175 b->cb_arg = arg;
176}
177
178char *
179BIO_get_callback_arg(const BIO *b)
180{
181 return b->cb_arg;
182}
183
184const char *
185BIO_method_name(const BIO *b)
186{
187 return b->method->name;
188}
189
190int
191BIO_method_type(const BIO *b)
192{
193 return b->method->type;
194}
195
196int
197BIO_read(BIO *b, void *out, int outl)
198{
199 int i;
200 long (*cb)(BIO *, int, const char *, int, long, long);
201
202 if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL)) {
203 BIOerr(BIO_F_BIO_READ, BIO_R_UNSUPPORTED_METHOD);
204 return (-2);
205 }
206
207 cb = b->callback;
208 if ((cb != NULL) &&
209 ((i = (int)cb(b, BIO_CB_READ, out, outl, 0L, 1L)) <= 0))
210 return (i);
211
212 if (!b->init) {
213 BIOerr(BIO_F_BIO_READ, BIO_R_UNINITIALIZED);
214 return (-2);
215 }
216
217 i = b->method->bread(b, out, outl);
218
219 if (i > 0)
220 b->num_read += (unsigned long)i;
221
222 if (cb != NULL)
223 i = (int)cb(b, BIO_CB_READ|BIO_CB_RETURN, out, outl,
224 0L, (long)i);
225 return (i);
226}
227
228int
229BIO_write(BIO *b, const void *in, int inl)
230{
231 int i;
232 long (*cb)(BIO *, int, const char *, int, long, long);
233
234 if (b == NULL)
235 return (0);
236
237 cb = b->callback;
238 if ((b->method == NULL) || (b->method->bwrite == NULL)) {
239 BIOerr(BIO_F_BIO_WRITE, BIO_R_UNSUPPORTED_METHOD);
240 return (-2);
241 }
242
243 if ((cb != NULL) &&
244 ((i = (int)cb(b, BIO_CB_WRITE, in, inl, 0L, 1L)) <= 0))
245 return (i);
246
247 if (!b->init) {
248 BIOerr(BIO_F_BIO_WRITE, BIO_R_UNINITIALIZED);
249 return (-2);
250 }
251
252 i = b->method->bwrite(b, in, inl);
253
254 if (i > 0)
255 b->num_write += (unsigned long)i;
256
257 if (cb != NULL)
258 i = (int)cb(b, BIO_CB_WRITE|BIO_CB_RETURN, in, inl,
259 0L, (long)i);
260 return (i);
261}
262
263int
264BIO_puts(BIO *b, const char *in)
265{
266 int i;
267 long (*cb)(BIO *, int, const char *, int, long, long);
268
269 if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) {
270 BIOerr(BIO_F_BIO_PUTS, BIO_R_UNSUPPORTED_METHOD);
271 return (-2);
272 }
273
274 cb = b->callback;
275
276 if ((cb != NULL) &&
277 ((i = (int)cb(b, BIO_CB_PUTS, in, 0, 0L, 1L)) <= 0))
278 return (i);
279
280 if (!b->init) {
281 BIOerr(BIO_F_BIO_PUTS, BIO_R_UNINITIALIZED);
282 return (-2);
283 }
284
285 i = b->method->bputs(b, in);
286
287 if (i > 0)
288 b->num_write += (unsigned long)i;
289
290 if (cb != NULL)
291 i = (int)cb(b, BIO_CB_PUTS|BIO_CB_RETURN, in, 0, 0L, (long)i);
292 return (i);
293}
294
295int
296BIO_gets(BIO *b, char *in, int inl)
297{
298 int i;
299 long (*cb)(BIO *, int, const char *, int, long, long);
300
301 if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) {
302 BIOerr(BIO_F_BIO_GETS, BIO_R_UNSUPPORTED_METHOD);
303 return (-2);
304 }
305
306 cb = b->callback;
307
308 if ((cb != NULL) &&
309 ((i = (int)cb(b, BIO_CB_GETS, in, inl, 0L, 1L)) <= 0))
310 return (i);
311
312 if (!b->init) {
313 BIOerr(BIO_F_BIO_GETS, BIO_R_UNINITIALIZED);
314 return (-2);
315 }
316
317 i = b->method->bgets(b, in, inl);
318
319 if (cb != NULL)
320 i = (int)cb(b, BIO_CB_GETS|BIO_CB_RETURN, in, inl, 0L, (long)i);
321 return (i);
322}
323
324int
325BIO_indent(BIO *b, int indent, int max)
326{
327 if (indent < 0)
328 indent = 0;
329 if (indent > max)
330 indent = max;
331 while (indent--)
332 if (BIO_puts(b, " ") != 1)
333 return 0;
334 return 1;
335}
336
337long
338BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
339{
340 int i;
341
342 i = iarg;
343 return (BIO_ctrl(b, cmd, larg, (char *)&i));
344}
345
346char *
347BIO_ptr_ctrl(BIO *b, int cmd, long larg)
348{
349 char *p = NULL;
350
351 if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
352 return (NULL);
353 else
354 return (p);
355}
356
357long
358BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
359{
360 long ret;
361 long (*cb)(BIO *, int, const char *, int, long, long);
362
363 if (b == NULL)
364 return (0);
365
366 if ((b->method == NULL) || (b->method->ctrl == NULL)) {
367 BIOerr(BIO_F_BIO_CTRL, BIO_R_UNSUPPORTED_METHOD);
368 return (-2);
369 }
370
371 cb = b->callback;
372
373 if ((cb != NULL) &&
374 ((ret = cb(b, BIO_CB_CTRL, parg, cmd, larg, 1L)) <= 0))
375 return (ret);
376
377 ret = b->method->ctrl(b, cmd, larg, parg);
378
379 if (cb != NULL)
380 ret = cb(b, BIO_CB_CTRL|BIO_CB_RETURN, parg, cmd, larg, ret);
381 return (ret);
382}
383
384long
385BIO_callback_ctrl(BIO *b, int cmd,
386 void (*fp)(struct bio_st *, int, const char *, int, long, long))
387{
388 long ret;
389 long (*cb)(BIO *, int, const char *, int, long, long);
390
391 if (b == NULL)
392 return (0);
393
394 if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) {
395 BIOerr(BIO_F_BIO_CALLBACK_CTRL, BIO_R_UNSUPPORTED_METHOD);
396 return (-2);
397 }
398
399 cb = b->callback;
400
401 if ((cb != NULL) &&
402 ((ret = cb(b, BIO_CB_CTRL, (void *)&fp, cmd, 0, 1L)) <= 0))
403 return (ret);
404
405 ret = b->method->callback_ctrl(b, cmd, fp);
406
407 if (cb != NULL)
408 ret = cb(b, BIO_CB_CTRL|BIO_CB_RETURN, (void *)&fp, cmd, 0, ret);
409 return (ret);
410}
411
412/* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
413 * do; but those macros have inappropriate return type, and for interfacing
414 * from other programming languages, C macros aren't much of a help anyway. */
415size_t
416BIO_ctrl_pending(BIO *bio)
417{
418 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
419}
420
421size_t
422BIO_ctrl_wpending(BIO *bio)
423{
424 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
425}
426
427
428/* put the 'bio' on the end of b's list of operators */
429BIO *
430BIO_push(BIO *b, BIO *bio)
431{
432 BIO *lb;
433
434 if (b == NULL)
435 return (bio);
436 lb = b;
437 while (lb->next_bio != NULL)
438 lb = lb->next_bio;
439 lb->next_bio = bio;
440 if (bio != NULL)
441 bio->prev_bio = lb;
442 /* called to do internal processing */
443 BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
444 return (b);
445}
446
447/* Remove the first and return the rest */
448BIO *
449BIO_pop(BIO *b)
450{
451 BIO *ret;
452
453 if (b == NULL)
454 return (NULL);
455 ret = b->next_bio;
456
457 BIO_ctrl(b, BIO_CTRL_POP, 0, b);
458
459 if (b->prev_bio != NULL)
460 b->prev_bio->next_bio = b->next_bio;
461 if (b->next_bio != NULL)
462 b->next_bio->prev_bio = b->prev_bio;
463
464 b->next_bio = NULL;
465 b->prev_bio = NULL;
466 return (ret);
467}
468
469BIO *
470BIO_get_retry_BIO(BIO *bio, int *reason)
471{
472 BIO *b, *last;
473
474 b = last = bio;
475 for (;;) {
476 if (!BIO_should_retry(b))
477 break;
478 last = b;
479 b = b->next_bio;
480 if (b == NULL)
481 break;
482 }
483 if (reason != NULL)
484 *reason = last->retry_reason;
485 return (last);
486}
487
488int
489BIO_get_retry_reason(BIO *bio)
490{
491 return (bio->retry_reason);
492}
493
494BIO *
495BIO_find_type(BIO *bio, int type)
496{
497 int mt, mask;
498
499 if (!bio)
500 return NULL;
501 mask = type & 0xff;
502 do {
503 if (bio->method != NULL) {
504 mt = bio->method->type;
505 if (!mask) {
506 if (mt & type)
507 return (bio);
508 } else if (mt == type)
509 return (bio);
510 }
511 bio = bio->next_bio;
512 } while (bio != NULL);
513 return (NULL);
514}
515
516BIO *
517BIO_next(BIO *b)
518{
519 if (!b)
520 return NULL;
521 return b->next_bio;
522}
523
524void
525BIO_free_all(BIO *bio)
526{
527 BIO *b;
528 int ref;
529
530 while (bio != NULL) {
531 b = bio;
532 ref = b->references;
533 bio = bio->next_bio;
534 BIO_free(b);
535 /* Since ref count > 1, don't free anyone else. */
536 if (ref > 1)
537 break;
538 }
539}
540
541BIO *
542BIO_dup_chain(BIO *in)
543{
544 BIO *ret = NULL, *eoc = NULL, *bio, *new_bio;
545
546 for (bio = in; bio != NULL; bio = bio->next_bio) {
547 if ((new_bio = BIO_new(bio->method)) == NULL)
548 goto err;
549 new_bio->callback = bio->callback;
550 new_bio->cb_arg = bio->cb_arg;
551 new_bio->init = bio->init;
552 new_bio->shutdown = bio->shutdown;
553 new_bio->flags = bio->flags;
554
555 /* This will let SSL_s_sock() work with stdin/stdout */
556 new_bio->num = bio->num;
557
558 if (!BIO_dup_state(bio, (char *)new_bio)) {
559 BIO_free(new_bio);
560 goto err;
561 }
562
563 /* copy app data */
564 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO,
565 &new_bio->ex_data, &bio->ex_data))
566 goto err;
567
568 if (ret == NULL) {
569 eoc = new_bio;
570 ret = eoc;
571 } else {
572 BIO_push(eoc, new_bio);
573 eoc = new_bio;
574 }
575 }
576 return (ret);
577err:
578 BIO_free(ret);
579 return (NULL);
580
581}
582
583void
584BIO_copy_next_retry(BIO *b)
585{
586 BIO_set_flags(b, BIO_get_retry_flags(b->next_bio));
587 b->retry_reason = b->next_bio->retry_reason;
588}
589
590int
591BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
592 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
593{
594 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp,
595 new_func, dup_func, free_func);
596}
597
598int
599BIO_set_ex_data(BIO *bio, int idx, void *data)
600{
601 return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data));
602}
603
604void *
605BIO_get_ex_data(BIO *bio, int idx)
606{
607 return (CRYPTO_get_ex_data(&(bio->ex_data), idx));
608}
609
610unsigned long
611BIO_number_read(BIO *bio)
612{
613 if (bio)
614 return bio->num_read;
615 return 0;
616}
617
618unsigned long
619BIO_number_written(BIO *bio)
620{
621 if (bio)
622 return bio->num_write;
623 return 0;
624}
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