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d02b48c6 | 1 | /* crypto/bio/bio_lib.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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 <stdio.h> | |
60 | #include <errno.h> | |
ec577822 | 61 | #include <openssl/crypto.h> |
d02b48c6 | 62 | #include "cryptlib.h" |
ec577822 BM |
63 | #include <openssl/bio.h> |
64 | #include <openssl/stack.h> | |
58964a49 | 65 | |
6b691a5c | 66 | BIO *BIO_new(BIO_METHOD *method) |
d02b48c6 RE |
67 | { |
68 | BIO *ret=NULL; | |
69 | ||
26a3a48d | 70 | ret=(BIO *)OPENSSL_malloc(sizeof(BIO)); |
d02b48c6 RE |
71 | if (ret == NULL) |
72 | { | |
73 | BIOerr(BIO_F_BIO_NEW,ERR_R_MALLOC_FAILURE); | |
74 | return(NULL); | |
75 | } | |
76 | if (!BIO_set(ret,method)) | |
77 | { | |
26a3a48d | 78 | OPENSSL_free(ret); |
d02b48c6 RE |
79 | ret=NULL; |
80 | } | |
81 | return(ret); | |
82 | } | |
83 | ||
6b691a5c | 84 | int BIO_set(BIO *bio, BIO_METHOD *method) |
d02b48c6 RE |
85 | { |
86 | bio->method=method; | |
87 | bio->callback=NULL; | |
88 | bio->cb_arg=NULL; | |
89 | bio->init=0; | |
90 | bio->shutdown=1; | |
d02b48c6 RE |
91 | bio->flags=0; |
92 | bio->retry_reason=0; | |
58964a49 | 93 | bio->num=0; |
d02b48c6 RE |
94 | bio->ptr=NULL; |
95 | bio->prev_bio=NULL; | |
96 | bio->next_bio=NULL; | |
97 | bio->references=1; | |
98 | bio->num_read=0L; | |
99 | bio->num_write=0L; | |
79aa04ef | 100 | CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data); |
d02b48c6 RE |
101 | if (method->create != NULL) |
102 | if (!method->create(bio)) | |
79aa04ef GT |
103 | { |
104 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, | |
105 | &bio->ex_data); | |
d02b48c6 | 106 | return(0); |
79aa04ef | 107 | } |
d02b48c6 RE |
108 | return(1); |
109 | } | |
110 | ||
6b691a5c | 111 | int BIO_free(BIO *a) |
d02b48c6 RE |
112 | { |
113 | int ret=0,i; | |
114 | ||
115 | if (a == NULL) return(0); | |
116 | ||
117 | i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO); | |
58964a49 RE |
118 | #ifdef REF_PRINT |
119 | REF_PRINT("BIO",a); | |
120 | #endif | |
b1c4fe36 | 121 | if (i > 0) return(1); |
d02b48c6 RE |
122 | #ifdef REF_CHECK |
123 | if (i < 0) | |
124 | { | |
125 | fprintf(stderr,"BIO_free, bad reference count\n"); | |
126 | abort(); | |
127 | } | |
128 | #endif | |
129 | if ((a->callback != NULL) && | |
130 | ((i=(int)a->callback(a,BIO_CB_FREE,NULL,0,0L,1L)) <= 0)) | |
131 | return(i); | |
132 | ||
79aa04ef | 133 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data); |
58964a49 | 134 | |
d02b48c6 RE |
135 | if ((a->method == NULL) || (a->method->destroy == NULL)) return(1); |
136 | ret=a->method->destroy(a); | |
26a3a48d | 137 | OPENSSL_free(a); |
d02b48c6 RE |
138 | return(1); |
139 | } | |
140 | ||
371acb22 BL |
141 | void BIO_vfree(BIO *a) |
142 | { BIO_free(a); } | |
143 | ||
61f5b6f3 | 144 | int BIO_read(BIO *b, void *out, int outl) |
d02b48c6 RE |
145 | { |
146 | int i; | |
58964a49 | 147 | long (*cb)(); |
d02b48c6 RE |
148 | |
149 | if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL)) | |
150 | { | |
151 | BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD); | |
152 | return(-2); | |
153 | } | |
154 | ||
58964a49 RE |
155 | cb=b->callback; |
156 | if ((cb != NULL) && | |
157 | ((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0)) | |
d02b48c6 RE |
158 | return(i); |
159 | ||
160 | if (!b->init) | |
161 | { | |
df82f5c8 | 162 | BIOerr(BIO_F_BIO_READ,BIO_R_UNINITIALIZED); |
d02b48c6 RE |
163 | return(-2); |
164 | } | |
165 | ||
166 | i=b->method->bread(b,out,outl); | |
dfeab068 | 167 | |
d02b48c6 RE |
168 | if (i > 0) b->num_read+=(unsigned long)i; |
169 | ||
58964a49 RE |
170 | if (cb != NULL) |
171 | i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl, | |
d02b48c6 RE |
172 | 0L,(long)i); |
173 | return(i); | |
174 | } | |
175 | ||
27b78273 | 176 | int BIO_write(BIO *b, const void *in, int inl) |
d02b48c6 RE |
177 | { |
178 | int i; | |
58964a49 RE |
179 | long (*cb)(); |
180 | ||
181 | if (b == NULL) | |
182 | return(0); | |
d02b48c6 | 183 | |
58964a49 RE |
184 | cb=b->callback; |
185 | if ((b->method == NULL) || (b->method->bwrite == NULL)) | |
d02b48c6 RE |
186 | { |
187 | BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD); | |
188 | return(-2); | |
189 | } | |
190 | ||
58964a49 RE |
191 | if ((cb != NULL) && |
192 | ((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0)) | |
d02b48c6 RE |
193 | return(i); |
194 | ||
195 | if (!b->init) | |
196 | { | |
df82f5c8 | 197 | BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITIALIZED); |
d02b48c6 RE |
198 | return(-2); |
199 | } | |
200 | ||
201 | i=b->method->bwrite(b,in,inl); | |
dfeab068 | 202 | |
d02b48c6 RE |
203 | if (i > 0) b->num_write+=(unsigned long)i; |
204 | ||
7d95ff76 | 205 | if (cb != NULL) |
58964a49 | 206 | i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl, |
d02b48c6 RE |
207 | 0L,(long)i); |
208 | return(i); | |
209 | } | |
210 | ||
6b691a5c | 211 | int BIO_puts(BIO *b, const char *in) |
d02b48c6 RE |
212 | { |
213 | int i; | |
58964a49 | 214 | long (*cb)(); |
d02b48c6 RE |
215 | |
216 | if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) | |
217 | { | |
218 | BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD); | |
219 | return(-2); | |
220 | } | |
221 | ||
58964a49 RE |
222 | cb=b->callback; |
223 | ||
224 | if ((cb != NULL) && | |
225 | ((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0)) | |
d02b48c6 RE |
226 | return(i); |
227 | ||
228 | if (!b->init) | |
229 | { | |
df82f5c8 | 230 | BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITIALIZED); |
d02b48c6 RE |
231 | return(-2); |
232 | } | |
233 | ||
234 | i=b->method->bputs(b,in); | |
235 | ||
7d95ff76 BM |
236 | if (i > 0) b->num_write+=(unsigned long)i; |
237 | ||
58964a49 RE |
238 | if (cb != NULL) |
239 | i=(int)cb(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0, | |
d02b48c6 RE |
240 | 0L,(long)i); |
241 | return(i); | |
242 | } | |
243 | ||
6b691a5c | 244 | int BIO_gets(BIO *b, char *in, int inl) |
d02b48c6 RE |
245 | { |
246 | int i; | |
58964a49 | 247 | long (*cb)(); |
d02b48c6 RE |
248 | |
249 | if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) | |
250 | { | |
251 | BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD); | |
252 | return(-2); | |
253 | } | |
254 | ||
58964a49 RE |
255 | cb=b->callback; |
256 | ||
257 | if ((cb != NULL) && | |
258 | ((i=(int)cb(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0)) | |
d02b48c6 RE |
259 | return(i); |
260 | ||
261 | if (!b->init) | |
262 | { | |
df82f5c8 | 263 | BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITIALIZED); |
d02b48c6 RE |
264 | return(-2); |
265 | } | |
266 | ||
267 | i=b->method->bgets(b,in,inl); | |
268 | ||
58964a49 RE |
269 | if (cb != NULL) |
270 | i=(int)cb(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl, | |
d02b48c6 RE |
271 | 0L,(long)i); |
272 | return(i); | |
273 | } | |
274 | ||
6b691a5c | 275 | long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg) |
d02b48c6 RE |
276 | { |
277 | int i; | |
278 | ||
279 | i=iarg; | |
280 | return(BIO_ctrl(b,cmd,larg,(char *)&i)); | |
281 | } | |
282 | ||
6b691a5c | 283 | char *BIO_ptr_ctrl(BIO *b, int cmd, long larg) |
58964a49 RE |
284 | { |
285 | char *p=NULL; | |
286 | ||
287 | if (BIO_ctrl(b,cmd,larg,(char *)&p) <= 0) | |
288 | return(NULL); | |
289 | else | |
290 | return(p); | |
291 | } | |
292 | ||
95d29597 | 293 | long BIO_ctrl(BIO *b, int cmd, long larg, void *parg) |
d02b48c6 RE |
294 | { |
295 | long ret; | |
58964a49 | 296 | long (*cb)(); |
d02b48c6 RE |
297 | |
298 | if (b == NULL) return(0); | |
299 | ||
300 | if ((b->method == NULL) || (b->method->ctrl == NULL)) | |
301 | { | |
302 | BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD); | |
303 | return(-2); | |
304 | } | |
305 | ||
58964a49 RE |
306 | cb=b->callback; |
307 | ||
308 | if ((cb != NULL) && | |
309 | ((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0)) | |
d02b48c6 RE |
310 | return(ret); |
311 | ||
312 | ret=b->method->ctrl(b,cmd,larg,parg); | |
313 | ||
58964a49 RE |
314 | if (cb != NULL) |
315 | ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd, | |
d02b48c6 RE |
316 | larg,ret); |
317 | return(ret); | |
318 | } | |
319 | ||
0e1c0612 | 320 | long BIO_callback_ctrl(BIO *b, int cmd, void (*fp)(struct bio_st *, int, const char *, int, long, long)) |
d3442bc7 RL |
321 | { |
322 | long ret; | |
323 | long (*cb)(); | |
324 | ||
325 | if (b == NULL) return(0); | |
326 | ||
327 | if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) | |
328 | { | |
329 | BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD); | |
330 | return(-2); | |
331 | } | |
332 | ||
333 | cb=b->callback; | |
334 | ||
335 | if ((cb != NULL) && | |
336 | ((ret=cb(b,BIO_CB_CTRL,(void *)&fp,cmd,0,1L)) <= 0)) | |
337 | return(ret); | |
338 | ||
339 | ret=b->method->callback_ctrl(b,cmd,fp); | |
340 | ||
341 | if (cb != NULL) | |
342 | ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,(void *)&fp,cmd, | |
343 | 0,ret); | |
344 | return(ret); | |
345 | } | |
346 | ||
95d29597 BM |
347 | /* It is unfortunate to duplicate in functions what the BIO_(w)pending macros |
348 | * do; but those macros have inappropriate return type, and for interfacing | |
349 | * from other programming languages, C macros aren't much of a help anyway. */ | |
350 | size_t BIO_ctrl_pending(BIO *bio) | |
d3442bc7 | 351 | { |
95d29597 BM |
352 | return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL); |
353 | } | |
354 | ||
355 | size_t BIO_ctrl_wpending(BIO *bio) | |
d3442bc7 | 356 | { |
95d29597 BM |
357 | return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL); |
358 | } | |
359 | ||
360 | ||
d02b48c6 | 361 | /* put the 'bio' on the end of b's list of operators */ |
6b691a5c | 362 | BIO *BIO_push(BIO *b, BIO *bio) |
d02b48c6 RE |
363 | { |
364 | BIO *lb; | |
365 | ||
366 | if (b == NULL) return(bio); | |
367 | lb=b; | |
368 | while (lb->next_bio != NULL) | |
369 | lb=lb->next_bio; | |
370 | lb->next_bio=bio; | |
371 | if (bio != NULL) | |
372 | bio->prev_bio=lb; | |
58964a49 | 373 | /* called to do internal processing */ |
d02b48c6 RE |
374 | BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL); |
375 | return(b); | |
376 | } | |
377 | ||
378 | /* Remove the first and return the rest */ | |
6b691a5c | 379 | BIO *BIO_pop(BIO *b) |
d02b48c6 RE |
380 | { |
381 | BIO *ret; | |
382 | ||
383 | if (b == NULL) return(NULL); | |
384 | ret=b->next_bio; | |
385 | ||
386 | if (b->prev_bio != NULL) | |
387 | b->prev_bio->next_bio=b->next_bio; | |
388 | if (b->next_bio != NULL) | |
389 | b->next_bio->prev_bio=b->prev_bio; | |
390 | ||
391 | b->next_bio=NULL; | |
392 | b->prev_bio=NULL; | |
393 | BIO_ctrl(b,BIO_CTRL_POP,0,NULL); | |
394 | return(ret); | |
395 | } | |
396 | ||
6b691a5c | 397 | BIO *BIO_get_retry_BIO(BIO *bio, int *reason) |
d02b48c6 RE |
398 | { |
399 | BIO *b,*last; | |
400 | ||
401 | b=last=bio; | |
402 | for (;;) | |
403 | { | |
404 | if (!BIO_should_retry(b)) break; | |
405 | last=b; | |
406 | b=b->next_bio; | |
407 | if (b == NULL) break; | |
408 | } | |
409 | if (reason != NULL) *reason=last->retry_reason; | |
410 | return(last); | |
411 | } | |
412 | ||
6b691a5c | 413 | int BIO_get_retry_reason(BIO *bio) |
d02b48c6 RE |
414 | { |
415 | return(bio->retry_reason); | |
416 | } | |
417 | ||
6b691a5c | 418 | BIO *BIO_find_type(BIO *bio, int type) |
d02b48c6 RE |
419 | { |
420 | int mt,mask; | |
421 | ||
f50c11ca | 422 | if(!bio) return NULL; |
d02b48c6 RE |
423 | mask=type&0xff; |
424 | do { | |
425 | if (bio->method != NULL) | |
426 | { | |
427 | mt=bio->method->type; | |
428 | ||
429 | if (!mask) | |
430 | { | |
431 | if (mt & type) return(bio); | |
432 | } | |
433 | else if (mt == type) | |
434 | return(bio); | |
435 | } | |
436 | bio=bio->next_bio; | |
437 | } while (bio != NULL); | |
438 | return(NULL); | |
439 | } | |
440 | ||
cfd3bb17 DSH |
441 | BIO *BIO_next(BIO *b) |
442 | { | |
443 | if(!b) return NULL; | |
444 | return b->next_bio; | |
445 | } | |
446 | ||
6b691a5c | 447 | void BIO_free_all(BIO *bio) |
d02b48c6 RE |
448 | { |
449 | BIO *b; | |
450 | int ref; | |
451 | ||
452 | while (bio != NULL) | |
453 | { | |
454 | b=bio; | |
455 | ref=b->references; | |
456 | bio=bio->next_bio; | |
457 | BIO_free(b); | |
458 | /* Since ref count > 1, don't free anyone else. */ | |
459 | if (ref > 1) break; | |
460 | } | |
461 | } | |
462 | ||
6b691a5c | 463 | BIO *BIO_dup_chain(BIO *in) |
d02b48c6 RE |
464 | { |
465 | BIO *ret=NULL,*eoc=NULL,*bio,*new; | |
466 | ||
467 | for (bio=in; bio != NULL; bio=bio->next_bio) | |
468 | { | |
469 | if ((new=BIO_new(bio->method)) == NULL) goto err; | |
470 | new->callback=bio->callback; | |
471 | new->cb_arg=bio->cb_arg; | |
472 | new->init=bio->init; | |
473 | new->shutdown=bio->shutdown; | |
474 | new->flags=bio->flags; | |
475 | ||
476 | /* This will let SSL_s_sock() work with stdin/stdout */ | |
477 | new->num=bio->num; | |
478 | ||
479 | if (!BIO_dup_state(bio,(char *)new)) | |
480 | { | |
481 | BIO_free(new); | |
482 | goto err; | |
483 | } | |
58964a49 | 484 | |
b1c4fe36 | 485 | /* copy app data */ |
79aa04ef GT |
486 | if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new->ex_data, |
487 | &bio->ex_data)) | |
b1c4fe36 | 488 | goto err; |
58964a49 | 489 | |
d02b48c6 RE |
490 | if (ret == NULL) |
491 | { | |
492 | eoc=new; | |
493 | ret=eoc; | |
494 | } | |
495 | else | |
496 | { | |
497 | BIO_push(eoc,new); | |
498 | eoc=new; | |
499 | } | |
500 | } | |
501 | return(ret); | |
502 | err: | |
503 | if (ret != NULL) | |
504 | BIO_free(ret); | |
505 | return(NULL); | |
506 | } | |
507 | ||
6b691a5c | 508 | void BIO_copy_next_retry(BIO *b) |
d02b48c6 RE |
509 | { |
510 | BIO_set_flags(b,BIO_get_retry_flags(b->next_bio)); | |
511 | b->retry_reason=b->next_bio->retry_reason; | |
512 | } | |
513 | ||
dd9d233e DSH |
514 | int BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
515 | CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) | |
b1c4fe36 | 516 | { |
79aa04ef GT |
517 | return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp, |
518 | new_func, dup_func, free_func); | |
b1c4fe36 | 519 | } |
58964a49 | 520 | |
dd9d233e | 521 | int BIO_set_ex_data(BIO *bio, int idx, void *data) |
58964a49 RE |
522 | { |
523 | return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data)); | |
524 | } | |
525 | ||
dd9d233e | 526 | void *BIO_get_ex_data(BIO *bio, int idx) |
58964a49 RE |
527 | { |
528 | return(CRYPTO_get_ex_data(&(bio->ex_data),idx)); | |
529 | } | |
530 | ||
c3ed3b6e DSH |
531 | unsigned long BIO_number_read(BIO *bio) |
532 | { | |
533 | if(bio) return bio->num_read; | |
534 | return 0; | |
535 | } | |
536 | ||
537 | unsigned long BIO_number_written(BIO *bio) | |
538 | { | |
539 | if(bio) return bio->num_write; | |
540 | return 0; | |
541 | } | |
371acb22 BL |
542 | |
543 | IMPLEMENT_STACK_OF(BIO) |