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-rw-r--r--src/lib/libcrypto/bio/bio_lib.c542
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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/* 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
66static STACK_OF(CRYPTO_EX_DATA_FUNCS) *bio_meth=NULL;
67static int bio_meth_num=0;
68
69BIO *BIO_new(BIO_METHOD *method)
70 {
71 BIO *ret=NULL;
72
73 ret=(BIO *)OPENSSL_malloc(sizeof(BIO));
74 if (ret == NULL)
75 {
76 BIOerr(BIO_F_BIO_NEW,ERR_R_MALLOC_FAILURE);
77 return(NULL);
78 }
79 if (!BIO_set(ret,method))
80 {
81 OPENSSL_free(ret);
82 ret=NULL;
83 }
84 return(ret);
85 }
86
87int BIO_set(BIO *bio, BIO_METHOD *method)
88 {
89 bio->method=method;
90 bio->callback=NULL;
91 bio->cb_arg=NULL;
92 bio->init=0;
93 bio->shutdown=1;
94 bio->flags=0;
95 bio->retry_reason=0;
96 bio->num=0;
97 bio->ptr=NULL;
98 bio->prev_bio=NULL;
99 bio->next_bio=NULL;
100 bio->references=1;
101 bio->num_read=0L;
102 bio->num_write=0L;
103 CRYPTO_new_ex_data(bio_meth,bio,&bio->ex_data);
104 if (method->create != NULL)
105 if (!method->create(bio))
106 return(0);
107 return(1);
108 }
109
110int BIO_free(BIO *a)
111 {
112 int ret=0,i;
113
114 if (a == NULL) return(0);
115
116 i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO);
117#ifdef REF_PRINT
118 REF_PRINT("BIO",a);
119#endif
120 if (i > 0) return(1);
121#ifdef REF_CHECK
122 if (i < 0)
123 {
124 fprintf(stderr,"BIO_free, bad reference count\n");
125 abort();
126 }
127#endif
128 if ((a->callback != NULL) &&
129 ((i=(int)a->callback(a,BIO_CB_FREE,NULL,0,0L,1L)) <= 0))
130 return(i);
131
132 CRYPTO_free_ex_data(bio_meth,a,&a->ex_data);
133
134 if ((a->method == NULL) || (a->method->destroy == NULL)) return(1);
135 ret=a->method->destroy(a);
136 OPENSSL_free(a);
137 return(1);
138 }
139
140void BIO_vfree(BIO *a)
141 { BIO_free(a); }
142
143int BIO_read(BIO *b, void *out, int outl)
144 {
145 int i;
146 long (*cb)();
147
148 if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL))
149 {
150 BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD);
151 return(-2);
152 }
153
154 cb=b->callback;
155 if ((cb != NULL) &&
156 ((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0))
157 return(i);
158
159 if (!b->init)
160 {
161 BIOerr(BIO_F_BIO_READ,BIO_R_UNINITIALIZED);
162 return(-2);
163 }
164
165 i=b->method->bread(b,out,outl);
166
167 if (i > 0) b->num_read+=(unsigned long)i;
168
169 if (cb != NULL)
170 i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl,
171 0L,(long)i);
172 return(i);
173 }
174
175int BIO_write(BIO *b, const void *in, int inl)
176 {
177 int i;
178 long (*cb)();
179
180 if (b == NULL)
181 return(0);
182
183 cb=b->callback;
184 if ((b->method == NULL) || (b->method->bwrite == NULL))
185 {
186 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD);
187 return(-2);
188 }
189
190 if ((cb != NULL) &&
191 ((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0))
192 return(i);
193
194 if (!b->init)
195 {
196 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITIALIZED);
197 return(-2);
198 }
199
200 i=b->method->bwrite(b,in,inl);
201
202 if (i > 0) b->num_write+=(unsigned long)i;
203
204 if (cb != NULL)
205 i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl,
206 0L,(long)i);
207 return(i);
208 }
209
210int BIO_puts(BIO *b, const char *in)
211 {
212 int i;
213 long (*cb)();
214
215 if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL))
216 {
217 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD);
218 return(-2);
219 }
220
221 cb=b->callback;
222
223 if ((cb != NULL) &&
224 ((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0))
225 return(i);
226
227 if (!b->init)
228 {
229 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITIALIZED);
230 return(-2);
231 }
232
233 i=b->method->bputs(b,in);
234
235 if (i > 0) b->num_write+=(unsigned long)i;
236
237 if (cb != NULL)
238 i=(int)cb(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0,
239 0L,(long)i);
240 return(i);
241 }
242
243int BIO_gets(BIO *b, char *in, int inl)
244 {
245 int i;
246 long (*cb)();
247
248 if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL))
249 {
250 BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD);
251 return(-2);
252 }
253
254 cb=b->callback;
255
256 if ((cb != NULL) &&
257 ((i=(int)cb(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0))
258 return(i);
259
260 if (!b->init)
261 {
262 BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITIALIZED);
263 return(-2);
264 }
265
266 i=b->method->bgets(b,in,inl);
267
268 if (cb != NULL)
269 i=(int)cb(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl,
270 0L,(long)i);
271 return(i);
272 }
273
274long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
275 {
276 int i;
277
278 i=iarg;
279 return(BIO_ctrl(b,cmd,larg,(char *)&i));
280 }
281
282char *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
283 {
284 char *p=NULL;
285
286 if (BIO_ctrl(b,cmd,larg,(char *)&p) <= 0)
287 return(NULL);
288 else
289 return(p);
290 }
291
292long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
293 {
294 long ret;
295 long (*cb)();
296
297 if (b == NULL) return(0);
298
299 if ((b->method == NULL) || (b->method->ctrl == NULL))
300 {
301 BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD);
302 return(-2);
303 }
304
305 cb=b->callback;
306
307 if ((cb != NULL) &&
308 ((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0))
309 return(ret);
310
311 ret=b->method->ctrl(b,cmd,larg,parg);
312
313 if (cb != NULL)
314 ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd,
315 larg,ret);
316 return(ret);
317 }
318
319long BIO_callback_ctrl(BIO *b, int cmd, void (*fp)(struct bio_st *, int, const char *, int, long, long))
320 {
321 long ret;
322 long (*cb)();
323
324 if (b == NULL) return(0);
325
326 if ((b->method == NULL) || (b->method->callback_ctrl == NULL))
327 {
328 BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD);
329 return(-2);
330 }
331
332 cb=b->callback;
333
334 if ((cb != NULL) &&
335 ((ret=cb(b,BIO_CB_CTRL,(void *)&fp,cmd,0,1L)) <= 0))
336 return(ret);
337
338 ret=b->method->callback_ctrl(b,cmd,fp);
339
340 if (cb != NULL)
341 ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,(void *)&fp,cmd,
342 0,ret);
343 return(ret);
344 }
345
346/* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
347 * do; but those macros have inappropriate return type, and for interfacing
348 * from other programming languages, C macros aren't much of a help anyway. */
349size_t BIO_ctrl_pending(BIO *bio)
350 {
351 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
352 }
353
354size_t BIO_ctrl_wpending(BIO *bio)
355 {
356 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
357 }
358
359
360/* put the 'bio' on the end of b's list of operators */
361BIO *BIO_push(BIO *b, BIO *bio)
362 {
363 BIO *lb;
364
365 if (b == NULL) return(bio);
366 lb=b;
367 while (lb->next_bio != NULL)
368 lb=lb->next_bio;
369 lb->next_bio=bio;
370 if (bio != NULL)
371 bio->prev_bio=lb;
372 /* called to do internal processing */
373 BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL);
374 return(b);
375 }
376
377/* Remove the first and return the rest */
378BIO *BIO_pop(BIO *b)
379 {
380 BIO *ret;
381
382 if (b == NULL) return(NULL);
383 ret=b->next_bio;
384
385 if (b->prev_bio != NULL)
386 b->prev_bio->next_bio=b->next_bio;
387 if (b->next_bio != NULL)
388 b->next_bio->prev_bio=b->prev_bio;
389
390 b->next_bio=NULL;
391 b->prev_bio=NULL;
392 BIO_ctrl(b,BIO_CTRL_POP,0,NULL);
393 return(ret);
394 }
395
396BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
397 {
398 BIO *b,*last;
399
400 b=last=bio;
401 for (;;)
402 {
403 if (!BIO_should_retry(b)) break;
404 last=b;
405 b=b->next_bio;
406 if (b == NULL) break;
407 }
408 if (reason != NULL) *reason=last->retry_reason;
409 return(last);
410 }
411
412int BIO_get_retry_reason(BIO *bio)
413 {
414 return(bio->retry_reason);
415 }
416
417BIO *BIO_find_type(BIO *bio, int type)
418 {
419 int mt,mask;
420
421 if(!bio) return NULL;
422 mask=type&0xff;
423 do {
424 if (bio->method != NULL)
425 {
426 mt=bio->method->type;
427
428 if (!mask)
429 {
430 if (mt & type) return(bio);
431 }
432 else if (mt == type)
433 return(bio);
434 }
435 bio=bio->next_bio;
436 } while (bio != NULL);
437 return(NULL);
438 }
439
440BIO *BIO_next(BIO *b)
441 {
442 if(!b) return NULL;
443 return b->next_bio;
444 }
445
446void BIO_free_all(BIO *bio)
447 {
448 BIO *b;
449 int ref;
450
451 while (bio != NULL)
452 {
453 b=bio;
454 ref=b->references;
455 bio=bio->next_bio;
456 BIO_free(b);
457 /* Since ref count > 1, don't free anyone else. */
458 if (ref > 1) break;
459 }
460 }
461
462BIO *BIO_dup_chain(BIO *in)
463 {
464 BIO *ret=NULL,*eoc=NULL,*bio,*new;
465
466 for (bio=in; bio != NULL; bio=bio->next_bio)
467 {
468 if ((new=BIO_new(bio->method)) == NULL) goto err;
469 new->callback=bio->callback;
470 new->cb_arg=bio->cb_arg;
471 new->init=bio->init;
472 new->shutdown=bio->shutdown;
473 new->flags=bio->flags;
474
475 /* This will let SSL_s_sock() work with stdin/stdout */
476 new->num=bio->num;
477
478 if (!BIO_dup_state(bio,(char *)new))
479 {
480 BIO_free(new);
481 goto err;
482 }
483
484 /* copy app data */
485 if (!CRYPTO_dup_ex_data(bio_meth,&new->ex_data,&bio->ex_data))
486 goto err;
487
488 if (ret == NULL)
489 {
490 eoc=new;
491 ret=eoc;
492 }
493 else
494 {
495 BIO_push(eoc,new);
496 eoc=new;
497 }
498 }
499 return(ret);
500err:
501 if (ret != NULL)
502 BIO_free(ret);
503 return(NULL);
504 }
505
506void BIO_copy_next_retry(BIO *b)
507 {
508 BIO_set_flags(b,BIO_get_retry_flags(b->next_bio));
509 b->retry_reason=b->next_bio->retry_reason;
510 }
511
512int BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
513 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
514 {
515 bio_meth_num++;
516 return(CRYPTO_get_ex_new_index(bio_meth_num-1,&bio_meth,
517 argl,argp,new_func,dup_func,free_func));
518 }
519
520int BIO_set_ex_data(BIO *bio, int idx, void *data)
521 {
522 return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data));
523 }
524
525void *BIO_get_ex_data(BIO *bio, int idx)
526 {
527 return(CRYPTO_get_ex_data(&(bio->ex_data),idx));
528 }
529
530unsigned long BIO_number_read(BIO *bio)
531{
532 if(bio) return bio->num_read;
533 return 0;
534}
535
536unsigned long BIO_number_written(BIO *bio)
537{
538 if(bio) return bio->num_write;
539 return 0;
540}
541
542IMPLEMENT_STACK_OF(BIO)
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