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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 *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 *)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 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,(char *)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,(char *)a,&a->ex_data);
133
134 if ((a->method == NULL) || (a->method->destroy == NULL)) return(1);
135 ret=a->method->destroy(a);
136 Free(a);
137 return(1);
138 }
139
140int BIO_read(BIO *b, void *out, int outl)
141 {
142 int i;
143 long (*cb)();
144
145 if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL))
146 {
147 BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD);
148 return(-2);
149 }
150
151 cb=b->callback;
152 if ((cb != NULL) &&
153 ((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0))
154 return(i);
155
156 if (!b->init)
157 {
158 BIOerr(BIO_F_BIO_READ,BIO_R_UNINITIALIZED);
159 return(-2);
160 }
161
162 i=b->method->bread(b,out,outl);
163
164 if (i > 0) b->num_read+=(unsigned long)i;
165
166 if (cb != NULL)
167 i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl,
168 0L,(long)i);
169 return(i);
170 }
171
172int BIO_write(BIO *b, const char *in, int inl)
173 {
174 int i;
175 long (*cb)();
176
177 if (b == NULL)
178 return(0);
179
180 cb=b->callback;
181 if ((b->method == NULL) || (b->method->bwrite == NULL))
182 {
183 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD);
184 return(-2);
185 }
186
187 if ((cb != NULL) &&
188 ((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0))
189 return(i);
190
191 if (!b->init)
192 {
193 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITIALIZED);
194 return(-2);
195 }
196
197 i=b->method->bwrite(b,in,inl);
198
199 if (i > 0) b->num_write+=(unsigned long)i;
200
201 /* This is evil and not thread safe. If the BIO has been freed,
202 * we must not call the callback. The only way to be able to
203 * determine this is the reference count which is now invalid since
204 * the memory has been free()ed.
205 */
206 if (b->references <= 0) abort();
207 if (cb != NULL) /* && (b->references >= 1)) */
208 i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl,
209 0L,(long)i);
210 return(i);
211 }
212
213int BIO_puts(BIO *b, const char *in)
214 {
215 int i;
216 long (*cb)();
217
218 if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL))
219 {
220 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD);
221 return(-2);
222 }
223
224 cb=b->callback;
225
226 if ((cb != NULL) &&
227 ((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0))
228 return(i);
229
230 if (!b->init)
231 {
232 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITIALIZED);
233 return(-2);
234 }
235
236 i=b->method->bputs(b,in);
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
244int BIO_gets(BIO *b, char *in, int inl)
245 {
246 int i;
247 long (*cb)();
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
275long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
276 {
277 int i;
278
279 i=iarg;
280 return(BIO_ctrl(b,cmd,larg,(char *)&i));
281 }
282
283char *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
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
293long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
294 {
295 long ret;
296 long (*cb)();
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
306 cb=b->callback;
307
308 if ((cb != NULL) &&
309 ((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0))
310 return(ret);
311
312 ret=b->method->ctrl(b,cmd,larg,parg);
313
314 if (cb != NULL)
315 ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd,
316 larg,ret);
317 return(ret);
318 }
319
320/* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
321 * do; but those macros have inappropriate return type, and for interfacing
322 * from other programming languages, C macros aren't much of a help anyway. */
323size_t BIO_ctrl_pending(BIO *bio)
324 {
325 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
326 }
327
328size_t BIO_ctrl_wpending(BIO *bio)
329 {
330 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
331 }
332
333
334/* put the 'bio' on the end of b's list of operators */
335BIO *BIO_push(BIO *b, BIO *bio)
336 {
337 BIO *lb;
338
339 if (b == NULL) return(bio);
340 lb=b;
341 while (lb->next_bio != NULL)
342 lb=lb->next_bio;
343 lb->next_bio=bio;
344 if (bio != NULL)
345 bio->prev_bio=lb;
346 /* called to do internal processing */
347 BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL);
348 return(b);
349 }
350
351/* Remove the first and return the rest */
352BIO *BIO_pop(BIO *b)
353 {
354 BIO *ret;
355
356 if (b == NULL) return(NULL);
357 ret=b->next_bio;
358
359 if (b->prev_bio != NULL)
360 b->prev_bio->next_bio=b->next_bio;
361 if (b->next_bio != NULL)
362 b->next_bio->prev_bio=b->prev_bio;
363
364 b->next_bio=NULL;
365 b->prev_bio=NULL;
366 BIO_ctrl(b,BIO_CTRL_POP,0,NULL);
367 return(ret);
368 }
369
370BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
371 {
372 BIO *b,*last;
373
374 b=last=bio;
375 for (;;)
376 {
377 if (!BIO_should_retry(b)) break;
378 last=b;
379 b=b->next_bio;
380 if (b == NULL) break;
381 }
382 if (reason != NULL) *reason=last->retry_reason;
383 return(last);
384 }
385
386int BIO_get_retry_reason(BIO *bio)
387 {
388 return(bio->retry_reason);
389 }
390
391BIO *BIO_find_type(BIO *bio, int type)
392 {
393 int mt,mask;
394
395 mask=type&0xff;
396 do {
397 if (bio->method != NULL)
398 {
399 mt=bio->method->type;
400
401 if (!mask)
402 {
403 if (mt & type) return(bio);
404 }
405 else if (mt == type)
406 return(bio);
407 }
408 bio=bio->next_bio;
409 } while (bio != NULL);
410 return(NULL);
411 }
412
413void BIO_free_all(BIO *bio)
414 {
415 BIO *b;
416 int ref;
417
418 while (bio != NULL)
419 {
420 b=bio;
421 ref=b->references;
422 bio=bio->next_bio;
423 BIO_free(b);
424 /* Since ref count > 1, don't free anyone else. */
425 if (ref > 1) break;
426 }
427 }
428
429BIO *BIO_dup_chain(BIO *in)
430 {
431 BIO *ret=NULL,*eoc=NULL,*bio,*new;
432
433 for (bio=in; bio != NULL; bio=bio->next_bio)
434 {
435 if ((new=BIO_new(bio->method)) == NULL) goto err;
436 new->callback=bio->callback;
437 new->cb_arg=bio->cb_arg;
438 new->init=bio->init;
439 new->shutdown=bio->shutdown;
440 new->flags=bio->flags;
441
442 /* This will let SSL_s_sock() work with stdin/stdout */
443 new->num=bio->num;
444
445 if (!BIO_dup_state(bio,(char *)new))
446 {
447 BIO_free(new);
448 goto err;
449 }
450
451 /* copy app data */
452 if (!CRYPTO_dup_ex_data(bio_meth,&new->ex_data,&bio->ex_data))
453 goto err;
454
455 if (ret == NULL)
456 {
457 eoc=new;
458 ret=eoc;
459 }
460 else
461 {
462 BIO_push(eoc,new);
463 eoc=new;
464 }
465 }
466 return(ret);
467err:
468 if (ret != NULL)
469 BIO_free(ret);
470 return(NULL);
471 }
472
473void BIO_copy_next_retry(BIO *b)
474 {
475 BIO_set_flags(b,BIO_get_retry_flags(b->next_bio));
476 b->retry_reason=b->next_bio->retry_reason;
477 }
478
479int BIO_get_ex_new_index(long argl, char *argp, int (*new_func)(),
480 int (*dup_func)(), void (*free_func)())
481 {
482 bio_meth_num++;
483 return(CRYPTO_get_ex_new_index(bio_meth_num-1,&bio_meth,
484 argl,argp,new_func,dup_func,free_func));
485 }
486
487int BIO_set_ex_data(BIO *bio, int idx, char *data)
488 {
489 return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data));
490 }
491
492char *BIO_get_ex_data(BIO *bio, int idx)
493 {
494 return(CRYPTO_get_ex_data(&(bio->ex_data),idx));
495 }
496
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