1 /* crypto/bio/bio_lib.c */
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 <stdio.h>
60 #include <errno.h>
61 #include <openssl/crypto.h>
62 #include "cryptlib.h"
63 #include <openssl/bio.h>
64 #include <openssl/stack.h>
65
BIO_new(BIO_METHOD * method)66 BIO *BIO_new(BIO_METHOD *method)
67 {
68 BIO *ret=NULL;
69
70 ret=(BIO *)OPENSSL_malloc(sizeof(BIO));
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 {
78 OPENSSL_free(ret);
79 ret=NULL;
80 }
81 return(ret);
82 }
83
BIO_set(BIO * bio,BIO_METHOD * method)84 int BIO_set(BIO *bio, BIO_METHOD *method)
85 {
86 bio->method=method;
87 bio->callback=NULL;
88 bio->cb_arg=NULL;
89 bio->init=0;
90 bio->shutdown=1;
91 bio->flags=0;
92 bio->retry_reason=0;
93 bio->num=0;
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;
100 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
101 if (method->create != NULL)
102 if (!method->create(bio))
103 {
104 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio,
105 &bio->ex_data);
106 return(0);
107 }
108 return(1);
109 }
110
BIO_free(BIO * a)111 int BIO_free(BIO *a)
112 {
113 int ret=0,i;
114
115 if (a == NULL) return(0);
116
117 i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO);
118 #ifdef REF_PRINT
119 REF_PRINT("BIO",a);
120 #endif
121 if (i > 0) return(1);
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
133 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
134
135 if ((a->method == NULL) || (a->method->destroy == NULL)) return(1);
136 ret=a->method->destroy(a);
137 OPENSSL_free(a);
138 return(1);
139 }
140
BIO_vfree(BIO * a)141 void BIO_vfree(BIO *a)
142 { BIO_free(a); }
143
BIO_read(BIO * b,void * out,int outl)144 int BIO_read(BIO *b, void *out, int outl)
145 {
146 int i;
147 long (*cb)(BIO *,int,const char *,int,long,long);
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
155 cb=b->callback;
156 if ((cb != NULL) &&
157 ((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0))
158 return(i);
159
160 if (!b->init)
161 {
162 BIOerr(BIO_F_BIO_READ,BIO_R_UNINITIALIZED);
163 return(-2);
164 }
165
166 i=b->method->bread(b,out,outl);
167
168 if (i > 0) b->num_read+=(unsigned long)i;
169
170 if (cb != NULL)
171 i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl,
172 0L,(long)i);
173 return(i);
174 }
175
BIO_write(BIO * b,const void * in,int inl)176 int BIO_write(BIO *b, const void *in, int inl)
177 {
178 int i;
179 long (*cb)(BIO *,int,const char *,int,long,long);
180
181 if (b == NULL)
182 return(0);
183
184 cb=b->callback;
185 if ((b->method == NULL) || (b->method->bwrite == NULL))
186 {
187 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD);
188 return(-2);
189 }
190
191 if ((cb != NULL) &&
192 ((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0))
193 return(i);
194
195 if (!b->init)
196 {
197 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITIALIZED);
198 return(-2);
199 }
200
201 i=b->method->bwrite(b,in,inl);
202
203 if (i > 0) b->num_write+=(unsigned long)i;
204
205 if (cb != NULL)
206 i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl,
207 0L,(long)i);
208 return(i);
209 }
210
BIO_puts(BIO * b,const char * in)211 int BIO_puts(BIO *b, const char *in)
212 {
213 int i;
214 long (*cb)(BIO *,int,const char *,int,long,long);
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
222 cb=b->callback;
223
224 if ((cb != NULL) &&
225 ((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0))
226 return(i);
227
228 if (!b->init)
229 {
230 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITIALIZED);
231 return(-2);
232 }
233
234 i=b->method->bputs(b,in);
235
236 if (i > 0) b->num_write+=(unsigned long)i;
237
238 if (cb != NULL)
239 i=(int)cb(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0,
240 0L,(long)i);
241 return(i);
242 }
243
BIO_gets(BIO * b,char * in,int inl)244 int BIO_gets(BIO *b, char *in, int inl)
245 {
246 int i;
247 long (*cb)(BIO *,int,const char *,int,long,long);
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
255 cb=b->callback;
256
257 if ((cb != NULL) &&
258 ((i=(int)cb(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0))
259 return(i);
260
261 if (!b->init)
262 {
263 BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITIALIZED);
264 return(-2);
265 }
266
267 i=b->method->bgets(b,in,inl);
268
269 if (cb != NULL)
270 i=(int)cb(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl,
271 0L,(long)i);
272 return(i);
273 }
274
BIO_indent(BIO * b,int indent,int max)275 int BIO_indent(BIO *b,int indent,int max)
276 {
277 if(indent < 0)
278 indent=0;
279 if(indent > max)
280 indent=max;
281 while(indent--)
282 if(BIO_puts(b," ") != 1)
283 return 0;
284 return 1;
285 }
286
BIO_int_ctrl(BIO * b,int cmd,long larg,int iarg)287 long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
288 {
289 int i;
290
291 i=iarg;
292 return(BIO_ctrl(b,cmd,larg,(char *)&i));
293 }
294
BIO_ptr_ctrl(BIO * b,int cmd,long larg)295 char *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
296 {
297 char *p=NULL;
298
299 if (BIO_ctrl(b,cmd,larg,(char *)&p) <= 0)
300 return(NULL);
301 else
302 return(p);
303 }
304
BIO_ctrl(BIO * b,int cmd,long larg,void * parg)305 long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
306 {
307 long ret;
308 long (*cb)(BIO *,int,const char *,int,long,long);
309
310 if (b == NULL) return(0);
311
312 if ((b->method == NULL) || (b->method->ctrl == NULL))
313 {
314 BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD);
315 return(-2);
316 }
317
318 cb=b->callback;
319
320 if ((cb != NULL) &&
321 ((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0))
322 return(ret);
323
324 ret=b->method->ctrl(b,cmd,larg,parg);
325
326 if (cb != NULL)
327 ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd,
328 larg,ret);
329 return(ret);
330 }
331
BIO_callback_ctrl(BIO * b,int cmd,void (* fp)(struct bio_st *,int,const char *,int,long,long))332 long BIO_callback_ctrl(BIO *b, int cmd, void (*fp)(struct bio_st *, int, const char *, int, long, long))
333 {
334 long ret;
335 long (*cb)(BIO *,int,const char *,int,long,long);
336
337 if (b == NULL) return(0);
338
339 if ((b->method == NULL) || (b->method->callback_ctrl == NULL))
340 {
341 BIOerr(BIO_F_BIO_CALLBACK_CTRL,BIO_R_UNSUPPORTED_METHOD);
342 return(-2);
343 }
344
345 cb=b->callback;
346
347 if ((cb != NULL) &&
348 ((ret=cb(b,BIO_CB_CTRL,(void *)&fp,cmd,0,1L)) <= 0))
349 return(ret);
350
351 ret=b->method->callback_ctrl(b,cmd,fp);
352
353 if (cb != NULL)
354 ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,(void *)&fp,cmd,
355 0,ret);
356 return(ret);
357 }
358
359 /* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
360 * do; but those macros have inappropriate return type, and for interfacing
361 * from other programming languages, C macros aren't much of a help anyway. */
BIO_ctrl_pending(BIO * bio)362 size_t BIO_ctrl_pending(BIO *bio)
363 {
364 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
365 }
366
BIO_ctrl_wpending(BIO * bio)367 size_t BIO_ctrl_wpending(BIO *bio)
368 {
369 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
370 }
371
372
373 /* put the 'bio' on the end of b's list of operators */
BIO_push(BIO * b,BIO * bio)374 BIO *BIO_push(BIO *b, BIO *bio)
375 {
376 BIO *lb;
377
378 if (b == NULL) return(bio);
379 lb=b;
380 while (lb->next_bio != NULL)
381 lb=lb->next_bio;
382 lb->next_bio=bio;
383 if (bio != NULL)
384 bio->prev_bio=lb;
385 /* called to do internal processing */
386 BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL);
387 return(b);
388 }
389
390 /* Remove the first and return the rest */
BIO_pop(BIO * b)391 BIO *BIO_pop(BIO *b)
392 {
393 BIO *ret;
394
395 if (b == NULL) return(NULL);
396 ret=b->next_bio;
397
398 BIO_ctrl(b,BIO_CTRL_POP,0,NULL);
399
400 if (b->prev_bio != NULL)
401 b->prev_bio->next_bio=b->next_bio;
402 if (b->next_bio != NULL)
403 b->next_bio->prev_bio=b->prev_bio;
404
405 b->next_bio=NULL;
406 b->prev_bio=NULL;
407 return(ret);
408 }
409
BIO_get_retry_BIO(BIO * bio,int * reason)410 BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
411 {
412 BIO *b,*last;
413
414 b=last=bio;
415 for (;;)
416 {
417 if (!BIO_should_retry(b)) break;
418 last=b;
419 b=b->next_bio;
420 if (b == NULL) break;
421 }
422 if (reason != NULL) *reason=last->retry_reason;
423 return(last);
424 }
425
BIO_get_retry_reason(BIO * bio)426 int BIO_get_retry_reason(BIO *bio)
427 {
428 return(bio->retry_reason);
429 }
430
BIO_find_type(BIO * bio,int type)431 BIO *BIO_find_type(BIO *bio, int type)
432 {
433 int mt,mask;
434
435 if(!bio) return NULL;
436 mask=type&0xff;
437 do {
438 if (bio->method != NULL)
439 {
440 mt=bio->method->type;
441
442 if (!mask)
443 {
444 if (mt & type) return(bio);
445 }
446 else if (mt == type)
447 return(bio);
448 }
449 bio=bio->next_bio;
450 } while (bio != NULL);
451 return(NULL);
452 }
453
BIO_next(BIO * b)454 BIO *BIO_next(BIO *b)
455 {
456 if(!b) return NULL;
457 return b->next_bio;
458 }
459
BIO_free_all(BIO * bio)460 void BIO_free_all(BIO *bio)
461 {
462 BIO *b;
463 int ref;
464
465 while (bio != NULL)
466 {
467 b=bio;
468 ref=b->references;
469 bio=bio->next_bio;
470 BIO_free(b);
471 /* Since ref count > 1, don't free anyone else. */
472 if (ref > 1) break;
473 }
474 }
475
BIO_dup_chain(BIO * in)476 BIO *BIO_dup_chain(BIO *in)
477 {
478 BIO *ret=NULL,*eoc=NULL,*bio,*new;
479
480 for (bio=in; bio != NULL; bio=bio->next_bio)
481 {
482 if ((new=BIO_new(bio->method)) == NULL) goto err;
483 new->callback=bio->callback;
484 new->cb_arg=bio->cb_arg;
485 new->init=bio->init;
486 new->shutdown=bio->shutdown;
487 new->flags=bio->flags;
488
489 /* This will let SSL_s_sock() work with stdin/stdout */
490 new->num=bio->num;
491
492 if (!BIO_dup_state(bio,(char *)new))
493 {
494 BIO_free(new);
495 goto err;
496 }
497
498 /* copy app data */
499 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new->ex_data,
500 &bio->ex_data))
501 goto err;
502
503 if (ret == NULL)
504 {
505 eoc=new;
506 ret=eoc;
507 }
508 else
509 {
510 BIO_push(eoc,new);
511 eoc=new;
512 }
513 }
514 return(ret);
515 err:
516 if (ret != NULL)
517 BIO_free(ret);
518 return(NULL);
519 }
520
BIO_copy_next_retry(BIO * b)521 void BIO_copy_next_retry(BIO *b)
522 {
523 BIO_set_flags(b,BIO_get_retry_flags(b->next_bio));
524 b->retry_reason=b->next_bio->retry_reason;
525 }
526
BIO_get_ex_new_index(long argl,void * argp,CRYPTO_EX_new * new_func,CRYPTO_EX_dup * dup_func,CRYPTO_EX_free * free_func)527 int BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
528 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
529 {
530 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp,
531 new_func, dup_func, free_func);
532 }
533
BIO_set_ex_data(BIO * bio,int idx,void * data)534 int BIO_set_ex_data(BIO *bio, int idx, void *data)
535 {
536 return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data));
537 }
538
BIO_get_ex_data(BIO * bio,int idx)539 void *BIO_get_ex_data(BIO *bio, int idx)
540 {
541 return(CRYPTO_get_ex_data(&(bio->ex_data),idx));
542 }
543
BIO_number_read(BIO * bio)544 unsigned long BIO_number_read(BIO *bio)
545 {
546 if(bio) return bio->num_read;
547 return 0;
548 }
549
BIO_number_written(BIO * bio)550 unsigned long BIO_number_written(BIO *bio)
551 {
552 if(bio) return bio->num_write;
553 return 0;
554 }
555
556 IMPLEMENT_STACK_OF(BIO)
557