1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
2 | * All rights reserved. |
3 | * |
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. |
7 | * |
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). |
14 | * |
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. |
21 | * |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions |
24 | * are met: |
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)" |
39 | * |
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 |
50 | * SUCH DAMAGE. |
51 | * |
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.] */ |
56 | |
57 | #include <openssl/bio.h> |
58 | |
59 | #include <assert.h> |
60 | #include <errno.h> |
61 | #include <limits.h> |
62 | #include <string.h> |
63 | |
64 | #include <openssl/asn1.h> |
65 | #include <openssl/err.h> |
66 | #include <openssl/mem.h> |
67 | #include <openssl/thread.h> |
68 | |
69 | #include "../internal.h" |
70 | |
71 | |
72 | BIO *BIO_new(const BIO_METHOD *method) { |
73 | BIO *ret = OPENSSL_malloc(sizeof(BIO)); |
74 | if (ret == NULL) { |
75 | OPENSSL_PUT_ERROR(BIO, ERR_R_MALLOC_FAILURE); |
76 | return NULL; |
77 | } |
78 | |
79 | OPENSSL_memset(ret, 0, sizeof(BIO)); |
80 | ret->method = method; |
81 | ret->shutdown = 1; |
82 | ret->references = 1; |
83 | |
84 | if (method->create != NULL && !method->create(ret)) { |
85 | OPENSSL_free(ret); |
86 | return NULL; |
87 | } |
88 | |
89 | return ret; |
90 | } |
91 | |
92 | int BIO_free(BIO *bio) { |
93 | BIO *next_bio; |
94 | |
95 | for (; bio != NULL; bio = next_bio) { |
96 | if (!CRYPTO_refcount_dec_and_test_zero(&bio->references)) { |
97 | return 0; |
98 | } |
99 | |
100 | next_bio = BIO_pop(bio); |
101 | |
102 | if (bio->method != NULL && bio->method->destroy != NULL) { |
103 | bio->method->destroy(bio); |
104 | } |
105 | |
106 | OPENSSL_free(bio); |
107 | } |
108 | return 1; |
109 | } |
110 | |
111 | int BIO_up_ref(BIO *bio) { |
112 | CRYPTO_refcount_inc(&bio->references); |
113 | return 1; |
114 | } |
115 | |
116 | void BIO_vfree(BIO *bio) { |
117 | BIO_free(bio); |
118 | } |
119 | |
120 | void BIO_free_all(BIO *bio) { |
121 | BIO_free(bio); |
122 | } |
123 | |
124 | int BIO_read(BIO *bio, void *buf, int len) { |
125 | if (bio == NULL || bio->method == NULL || bio->method->bread == NULL) { |
126 | OPENSSL_PUT_ERROR(BIO, BIO_R_UNSUPPORTED_METHOD); |
127 | return -2; |
128 | } |
129 | if (!bio->init) { |
130 | OPENSSL_PUT_ERROR(BIO, BIO_R_UNINITIALIZED); |
131 | return -2; |
132 | } |
133 | if (len <= 0) { |
134 | return 0; |
135 | } |
136 | int ret = bio->method->bread(bio, buf, len); |
137 | if (ret > 0) { |
138 | bio->num_read += ret; |
139 | } |
140 | return ret; |
141 | } |
142 | |
143 | int BIO_gets(BIO *bio, char *buf, int len) { |
144 | if (bio == NULL || bio->method == NULL || bio->method->bgets == NULL) { |
145 | OPENSSL_PUT_ERROR(BIO, BIO_R_UNSUPPORTED_METHOD); |
146 | return -2; |
147 | } |
148 | if (!bio->init) { |
149 | OPENSSL_PUT_ERROR(BIO, BIO_R_UNINITIALIZED); |
150 | return -2; |
151 | } |
152 | if (len <= 0) { |
153 | return 0; |
154 | } |
155 | int ret = bio->method->bgets(bio, buf, len); |
156 | if (ret > 0) { |
157 | bio->num_read += ret; |
158 | } |
159 | return ret; |
160 | } |
161 | |
162 | int BIO_write(BIO *bio, const void *in, int inl) { |
163 | if (bio == NULL || bio->method == NULL || bio->method->bwrite == NULL) { |
164 | OPENSSL_PUT_ERROR(BIO, BIO_R_UNSUPPORTED_METHOD); |
165 | return -2; |
166 | } |
167 | if (!bio->init) { |
168 | OPENSSL_PUT_ERROR(BIO, BIO_R_UNINITIALIZED); |
169 | return -2; |
170 | } |
171 | if (inl <= 0) { |
172 | return 0; |
173 | } |
174 | int ret = bio->method->bwrite(bio, in, inl); |
175 | if (ret > 0) { |
176 | bio->num_write += ret; |
177 | } |
178 | return ret; |
179 | } |
180 | |
181 | int BIO_write_all(BIO *bio, const void *data, size_t len) { |
182 | const uint8_t *data_u8 = data; |
183 | while (len > 0) { |
184 | int ret = BIO_write(bio, data_u8, len > INT_MAX ? INT_MAX : (int)len); |
185 | if (ret <= 0) { |
186 | return 0; |
187 | } |
188 | data_u8 += ret; |
189 | len -= ret; |
190 | } |
191 | return 1; |
192 | } |
193 | |
194 | int BIO_puts(BIO *bio, const char *in) { |
195 | return BIO_write(bio, in, strlen(in)); |
196 | } |
197 | |
198 | int BIO_flush(BIO *bio) { |
199 | return BIO_ctrl(bio, BIO_CTRL_FLUSH, 0, NULL); |
200 | } |
201 | |
202 | long BIO_ctrl(BIO *bio, int cmd, long larg, void *parg) { |
203 | if (bio == NULL) { |
204 | return 0; |
205 | } |
206 | |
207 | if (bio->method == NULL || bio->method->ctrl == NULL) { |
208 | OPENSSL_PUT_ERROR(BIO, BIO_R_UNSUPPORTED_METHOD); |
209 | return -2; |
210 | } |
211 | |
212 | return bio->method->ctrl(bio, cmd, larg, parg); |
213 | } |
214 | |
215 | char *BIO_ptr_ctrl(BIO *b, int cmd, long larg) { |
216 | char *p = NULL; |
217 | |
218 | if (BIO_ctrl(b, cmd, larg, (void *)&p) <= 0) { |
219 | return NULL; |
220 | } |
221 | |
222 | return p; |
223 | } |
224 | |
225 | long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg) { |
226 | int i = iarg; |
227 | |
228 | return BIO_ctrl(b, cmd, larg, (void *)&i); |
229 | } |
230 | |
231 | int BIO_reset(BIO *bio) { |
232 | return BIO_ctrl(bio, BIO_CTRL_RESET, 0, NULL); |
233 | } |
234 | |
235 | int BIO_eof(BIO *bio) { |
236 | return BIO_ctrl(bio, BIO_CTRL_EOF, 0, NULL); |
237 | } |
238 | |
239 | void BIO_set_flags(BIO *bio, int flags) { |
240 | bio->flags |= flags; |
241 | } |
242 | |
243 | int BIO_test_flags(const BIO *bio, int flags) { |
244 | return bio->flags & flags; |
245 | } |
246 | |
247 | int BIO_should_read(const BIO *bio) { |
248 | return BIO_test_flags(bio, BIO_FLAGS_READ); |
249 | } |
250 | |
251 | int BIO_should_write(const BIO *bio) { |
252 | return BIO_test_flags(bio, BIO_FLAGS_WRITE); |
253 | } |
254 | |
255 | int BIO_should_retry(const BIO *bio) { |
256 | return BIO_test_flags(bio, BIO_FLAGS_SHOULD_RETRY); |
257 | } |
258 | |
259 | int BIO_should_io_special(const BIO *bio) { |
260 | return BIO_test_flags(bio, BIO_FLAGS_IO_SPECIAL); |
261 | } |
262 | |
263 | int BIO_get_retry_reason(const BIO *bio) { return bio->retry_reason; } |
264 | |
265 | void BIO_clear_flags(BIO *bio, int flags) { |
266 | bio->flags &= ~flags; |
267 | } |
268 | |
269 | void BIO_set_retry_read(BIO *bio) { |
270 | bio->flags |= BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY; |
271 | } |
272 | |
273 | void BIO_set_retry_write(BIO *bio) { |
274 | bio->flags |= BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY; |
275 | } |
276 | |
277 | static const int kRetryFlags = BIO_FLAGS_RWS | BIO_FLAGS_SHOULD_RETRY; |
278 | |
279 | int BIO_get_retry_flags(BIO *bio) { |
280 | return bio->flags & kRetryFlags; |
281 | } |
282 | |
283 | void BIO_clear_retry_flags(BIO *bio) { |
284 | bio->flags &= ~kRetryFlags; |
285 | bio->retry_reason = 0; |
286 | } |
287 | |
288 | int BIO_method_type(const BIO *bio) { return bio->method->type; } |
289 | |
290 | void BIO_copy_next_retry(BIO *bio) { |
291 | BIO_clear_retry_flags(bio); |
292 | BIO_set_flags(bio, BIO_get_retry_flags(bio->next_bio)); |
293 | bio->retry_reason = bio->next_bio->retry_reason; |
294 | } |
295 | |
296 | long BIO_callback_ctrl(BIO *bio, int cmd, bio_info_cb fp) { |
297 | if (bio == NULL) { |
298 | return 0; |
299 | } |
300 | |
301 | if (bio->method == NULL || bio->method->callback_ctrl == NULL) { |
302 | OPENSSL_PUT_ERROR(BIO, BIO_R_UNSUPPORTED_METHOD); |
303 | return 0; |
304 | } |
305 | |
306 | return bio->method->callback_ctrl(bio, cmd, fp); |
307 | } |
308 | |
309 | size_t BIO_pending(const BIO *bio) { |
310 | const long r = BIO_ctrl((BIO *) bio, BIO_CTRL_PENDING, 0, NULL); |
311 | assert(r >= 0); |
312 | |
313 | if (r < 0) { |
314 | return 0; |
315 | } |
316 | return r; |
317 | } |
318 | |
319 | size_t BIO_ctrl_pending(const BIO *bio) { |
320 | return BIO_pending(bio); |
321 | } |
322 | |
323 | size_t BIO_wpending(const BIO *bio) { |
324 | const long r = BIO_ctrl((BIO *) bio, BIO_CTRL_WPENDING, 0, NULL); |
325 | assert(r >= 0); |
326 | |
327 | if (r < 0) { |
328 | return 0; |
329 | } |
330 | return r; |
331 | } |
332 | |
333 | int BIO_set_close(BIO *bio, int close_flag) { |
334 | return BIO_ctrl(bio, BIO_CTRL_SET_CLOSE, close_flag, NULL); |
335 | } |
336 | |
337 | OPENSSL_EXPORT size_t BIO_number_read(const BIO *bio) { |
338 | return bio->num_read; |
339 | } |
340 | |
341 | OPENSSL_EXPORT size_t BIO_number_written(const BIO *bio) { |
342 | return bio->num_write; |
343 | } |
344 | |
345 | BIO *BIO_push(BIO *bio, BIO *appended_bio) { |
346 | BIO *last_bio; |
347 | |
348 | if (bio == NULL) { |
349 | return bio; |
350 | } |
351 | |
352 | last_bio = bio; |
353 | while (last_bio->next_bio != NULL) { |
354 | last_bio = last_bio->next_bio; |
355 | } |
356 | |
357 | last_bio->next_bio = appended_bio; |
358 | return bio; |
359 | } |
360 | |
361 | BIO *BIO_pop(BIO *bio) { |
362 | BIO *ret; |
363 | |
364 | if (bio == NULL) { |
365 | return NULL; |
366 | } |
367 | ret = bio->next_bio; |
368 | bio->next_bio = NULL; |
369 | return ret; |
370 | } |
371 | |
372 | BIO *BIO_next(BIO *bio) { |
373 | if (!bio) { |
374 | return NULL; |
375 | } |
376 | return bio->next_bio; |
377 | } |
378 | |
379 | BIO *BIO_find_type(BIO *bio, int type) { |
380 | int method_type, mask; |
381 | |
382 | if (!bio) { |
383 | return NULL; |
384 | } |
385 | mask = type & 0xff; |
386 | |
387 | do { |
388 | if (bio->method != NULL) { |
389 | method_type = bio->method->type; |
390 | |
391 | if (!mask) { |
392 | if (method_type & type) { |
393 | return bio; |
394 | } |
395 | } else if (method_type == type) { |
396 | return bio; |
397 | } |
398 | } |
399 | bio = bio->next_bio; |
400 | } while (bio != NULL); |
401 | |
402 | return NULL; |
403 | } |
404 | |
405 | int BIO_indent(BIO *bio, unsigned indent, unsigned max_indent) { |
406 | if (indent > max_indent) { |
407 | indent = max_indent; |
408 | } |
409 | |
410 | while (indent--) { |
411 | if (BIO_puts(bio, " " ) != 1) { |
412 | return 0; |
413 | } |
414 | } |
415 | return 1; |
416 | } |
417 | |
418 | static int print_bio(const char *str, size_t len, void *bio) { |
419 | return BIO_write((BIO *)bio, str, len); |
420 | } |
421 | |
422 | void ERR_print_errors(BIO *bio) { |
423 | ERR_print_errors_cb(print_bio, bio); |
424 | } |
425 | |
426 | // bio_read_all reads everything from |bio| and prepends |prefix| to it. On |
427 | // success, |*out| is set to an allocated buffer (which should be freed with |
428 | // |OPENSSL_free|), |*out_len| is set to its length and one is returned. The |
429 | // buffer will contain |prefix| followed by the contents of |bio|. On failure, |
430 | // zero is returned. |
431 | // |
432 | // The function will fail if the size of the output would equal or exceed |
433 | // |max_len|. |
434 | static int bio_read_all(BIO *bio, uint8_t **out, size_t *out_len, |
435 | const uint8_t *prefix, size_t prefix_len, |
436 | size_t max_len) { |
437 | static const size_t kChunkSize = 4096; |
438 | |
439 | size_t len = prefix_len + kChunkSize; |
440 | if (len > max_len) { |
441 | len = max_len; |
442 | } |
443 | if (len < prefix_len) { |
444 | return 0; |
445 | } |
446 | *out = OPENSSL_malloc(len); |
447 | if (*out == NULL) { |
448 | return 0; |
449 | } |
450 | OPENSSL_memcpy(*out, prefix, prefix_len); |
451 | size_t done = prefix_len; |
452 | |
453 | for (;;) { |
454 | if (done == len) { |
455 | OPENSSL_free(*out); |
456 | return 0; |
457 | } |
458 | const size_t todo = len - done; |
459 | assert(todo < INT_MAX); |
460 | const int n = BIO_read(bio, *out + done, todo); |
461 | if (n == 0) { |
462 | *out_len = done; |
463 | return 1; |
464 | } else if (n == -1) { |
465 | OPENSSL_free(*out); |
466 | return 0; |
467 | } |
468 | |
469 | done += n; |
470 | if (len < max_len && len - done < kChunkSize / 2) { |
471 | len += kChunkSize; |
472 | if (len < kChunkSize || len > max_len) { |
473 | len = max_len; |
474 | } |
475 | uint8_t *new_buf = OPENSSL_realloc(*out, len); |
476 | if (new_buf == NULL) { |
477 | OPENSSL_free(*out); |
478 | return 0; |
479 | } |
480 | *out = new_buf; |
481 | } |
482 | } |
483 | } |
484 | |
485 | // bio_read_full reads |len| bytes |bio| and writes them into |out|. It |
486 | // tolerates partial reads from |bio| and returns one on success or zero if a |
487 | // read fails before |len| bytes are read. On failure, it additionally sets |
488 | // |*out_eof_on_first_read| to whether the error was due to |bio| returning zero |
489 | // on the first read. |out_eof_on_first_read| may be NULL to discard the value. |
490 | static int bio_read_full(BIO *bio, uint8_t *out, int *out_eof_on_first_read, |
491 | size_t len) { |
492 | int first_read = 1; |
493 | while (len > 0) { |
494 | int todo = len <= INT_MAX ? (int)len : INT_MAX; |
495 | int ret = BIO_read(bio, out, todo); |
496 | if (ret <= 0) { |
497 | if (out_eof_on_first_read != NULL) { |
498 | *out_eof_on_first_read = first_read && ret == 0; |
499 | } |
500 | return 0; |
501 | } |
502 | out += ret; |
503 | len -= (size_t)ret; |
504 | first_read = 0; |
505 | } |
506 | |
507 | return 1; |
508 | } |
509 | |
510 | // For compatibility with existing |d2i_*_bio| callers, |BIO_read_asn1| uses |
511 | // |ERR_LIB_ASN1| errors. |
512 | OPENSSL_DECLARE_ERROR_REASON(ASN1, ASN1_R_DECODE_ERROR) |
513 | OPENSSL_DECLARE_ERROR_REASON(ASN1, ASN1_R_HEADER_TOO_LONG) |
514 | OPENSSL_DECLARE_ERROR_REASON(ASN1, ASN1_R_NOT_ENOUGH_DATA) |
515 | OPENSSL_DECLARE_ERROR_REASON(ASN1, ASN1_R_TOO_LONG) |
516 | |
517 | int BIO_read_asn1(BIO *bio, uint8_t **out, size_t *out_len, size_t max_len) { |
518 | uint8_t [6]; |
519 | |
520 | static const size_t = 2; |
521 | int eof_on_first_read; |
522 | if (!bio_read_full(bio, header, &eof_on_first_read, kInitialHeaderLen)) { |
523 | if (eof_on_first_read) { |
524 | // Historically, OpenSSL returned |ASN1_R_HEADER_TOO_LONG| when |
525 | // |d2i_*_bio| could not read anything. CPython conditions on this to |
526 | // determine if |bio| was empty. |
527 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_HEADER_TOO_LONG); |
528 | } else { |
529 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_NOT_ENOUGH_DATA); |
530 | } |
531 | return 0; |
532 | } |
533 | |
534 | const uint8_t tag = header[0]; |
535 | const uint8_t length_byte = header[1]; |
536 | |
537 | if ((tag & 0x1f) == 0x1f) { |
538 | // Long form tags are not supported. |
539 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_DECODE_ERROR); |
540 | return 0; |
541 | } |
542 | |
543 | size_t len, ; |
544 | if ((length_byte & 0x80) == 0) { |
545 | // Short form length. |
546 | len = length_byte; |
547 | header_len = kInitialHeaderLen; |
548 | } else { |
549 | const size_t num_bytes = length_byte & 0x7f; |
550 | |
551 | if ((tag & 0x20 /* constructed */) != 0 && num_bytes == 0) { |
552 | // indefinite length. |
553 | if (!bio_read_all(bio, out, out_len, header, kInitialHeaderLen, |
554 | max_len)) { |
555 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_NOT_ENOUGH_DATA); |
556 | return 0; |
557 | } |
558 | return 1; |
559 | } |
560 | |
561 | if (num_bytes == 0 || num_bytes > 4) { |
562 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_DECODE_ERROR); |
563 | return 0; |
564 | } |
565 | |
566 | if (!bio_read_full(bio, header + kInitialHeaderLen, NULL, num_bytes)) { |
567 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_NOT_ENOUGH_DATA); |
568 | return 0; |
569 | } |
570 | header_len = kInitialHeaderLen + num_bytes; |
571 | |
572 | uint32_t len32 = 0; |
573 | for (unsigned i = 0; i < num_bytes; i++) { |
574 | len32 <<= 8; |
575 | len32 |= header[kInitialHeaderLen + i]; |
576 | } |
577 | |
578 | if (len32 < 128) { |
579 | // Length should have used short-form encoding. |
580 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_DECODE_ERROR); |
581 | return 0; |
582 | } |
583 | |
584 | if ((len32 >> ((num_bytes-1)*8)) == 0) { |
585 | // Length should have been at least one byte shorter. |
586 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_DECODE_ERROR); |
587 | return 0; |
588 | } |
589 | |
590 | len = len32; |
591 | } |
592 | |
593 | if (len + header_len < len || |
594 | len + header_len > max_len || |
595 | len > INT_MAX) { |
596 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_TOO_LONG); |
597 | return 0; |
598 | } |
599 | len += header_len; |
600 | *out_len = len; |
601 | |
602 | *out = OPENSSL_malloc(len); |
603 | if (*out == NULL) { |
604 | OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); |
605 | return 0; |
606 | } |
607 | OPENSSL_memcpy(*out, header, header_len); |
608 | if (!bio_read_full(bio, (*out) + header_len, NULL, len - header_len)) { |
609 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_NOT_ENOUGH_DATA); |
610 | OPENSSL_free(*out); |
611 | return 0; |
612 | } |
613 | |
614 | return 1; |
615 | } |
616 | |
617 | void BIO_set_retry_special(BIO *bio) { |
618 | bio->flags |= BIO_FLAGS_READ | BIO_FLAGS_IO_SPECIAL; |
619 | } |
620 | |
621 | int BIO_set_write_buffer_size(BIO *bio, int buffer_size) { return 0; } |
622 | |
623 | static struct CRYPTO_STATIC_MUTEX g_index_lock = CRYPTO_STATIC_MUTEX_INIT; |
624 | static int g_index = BIO_TYPE_START; |
625 | |
626 | int BIO_get_new_index(void) { |
627 | CRYPTO_STATIC_MUTEX_lock_write(&g_index_lock); |
628 | // If |g_index| exceeds 255, it will collide with the flags bits. |
629 | int ret = g_index > 255 ? -1 : g_index++; |
630 | CRYPTO_STATIC_MUTEX_unlock_write(&g_index_lock); |
631 | return ret; |
632 | } |
633 | |
634 | BIO_METHOD *BIO_meth_new(int type, const char *name) { |
635 | BIO_METHOD *method = OPENSSL_malloc(sizeof(BIO_METHOD)); |
636 | if (method == NULL) { |
637 | return NULL; |
638 | } |
639 | OPENSSL_memset(method, 0, sizeof(BIO_METHOD)); |
640 | method->type = type; |
641 | method->name = name; |
642 | return method; |
643 | } |
644 | |
645 | void BIO_meth_free(BIO_METHOD *method) { |
646 | OPENSSL_free(method); |
647 | } |
648 | |
649 | int BIO_meth_set_create(BIO_METHOD *method, |
650 | int (*create)(BIO *)) { |
651 | method->create = create; |
652 | return 1; |
653 | } |
654 | |
655 | int BIO_meth_set_destroy(BIO_METHOD *method, |
656 | int (*destroy)(BIO *)) { |
657 | method->destroy = destroy; |
658 | return 1; |
659 | } |
660 | |
661 | int BIO_meth_set_write(BIO_METHOD *method, |
662 | int (*write)(BIO *, const char *, int)) { |
663 | method->bwrite = write; |
664 | return 1; |
665 | } |
666 | |
667 | int BIO_meth_set_read(BIO_METHOD *method, |
668 | int (*read)(BIO *, char *, int)) { |
669 | method->bread = read; |
670 | return 1; |
671 | } |
672 | |
673 | int BIO_meth_set_gets(BIO_METHOD *method, |
674 | int (*gets)(BIO *, char *, int)) { |
675 | method->bgets = gets; |
676 | return 1; |
677 | } |
678 | |
679 | int BIO_meth_set_ctrl(BIO_METHOD *method, |
680 | long (*ctrl)(BIO *, int, long, void *)) { |
681 | method->ctrl = ctrl; |
682 | return 1; |
683 | } |
684 | |
685 | void BIO_set_data(BIO *bio, void *ptr) { bio->ptr = ptr; } |
686 | |
687 | void *BIO_get_data(BIO *bio) { return bio->ptr; } |
688 | |
689 | void BIO_set_init(BIO *bio, int init) { bio->init = init; } |
690 | |
691 | int BIO_get_init(BIO *bio) { return bio->init; } |
692 | |
693 | void BIO_set_shutdown(BIO *bio, int shutdown) { bio->shutdown = shutdown; } |
694 | |
695 | int BIO_get_shutdown(BIO *bio) { return bio->shutdown; } |
696 | |
697 | int BIO_meth_set_puts(BIO_METHOD *method, int (*puts)(BIO *, const char *)) { |
698 | // Ignore the parameter. We implement |BIO_puts| using |BIO_write|. |
699 | return 1; |
700 | } |
701 | |