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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 RE |
65 | |
66 | static STACK *bio_meth=NULL; | |
67 | static int bio_meth_num=0; | |
d02b48c6 | 68 | |
6b691a5c | 69 | BIO *BIO_new(BIO_METHOD *method) |
d02b48c6 RE |
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 | ||
6b691a5c | 87 | int BIO_set(BIO *bio, BIO_METHOD *method) |
d02b48c6 RE |
88 | { |
89 | bio->method=method; | |
90 | bio->callback=NULL; | |
91 | bio->cb_arg=NULL; | |
92 | bio->init=0; | |
93 | bio->shutdown=1; | |
d02b48c6 RE |
94 | bio->flags=0; |
95 | bio->retry_reason=0; | |
58964a49 | 96 | bio->num=0; |
d02b48c6 RE |
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; | |
58964a49 | 103 | CRYPTO_new_ex_data(bio_meth,(char *)bio,&bio->ex_data); |
d02b48c6 RE |
104 | if (method->create != NULL) |
105 | if (!method->create(bio)) | |
106 | return(0); | |
107 | return(1); | |
108 | } | |
109 | ||
6b691a5c | 110 | int BIO_free(BIO *a) |
d02b48c6 RE |
111 | { |
112 | int ret=0,i; | |
113 | ||
114 | if (a == NULL) return(0); | |
115 | ||
116 | i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO); | |
58964a49 RE |
117 | #ifdef REF_PRINT |
118 | REF_PRINT("BIO",a); | |
119 | #endif | |
b1c4fe36 | 120 | if (i > 0) return(1); |
d02b48c6 RE |
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 | ||
58964a49 RE |
132 | CRYPTO_free_ex_data(bio_meth,(char *)a,&a->ex_data); |
133 | ||
d02b48c6 RE |
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 | ||
61f5b6f3 | 140 | int BIO_read(BIO *b, void *out, int outl) |
d02b48c6 RE |
141 | { |
142 | int i; | |
58964a49 | 143 | long (*cb)(); |
d02b48c6 RE |
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 | ||
58964a49 RE |
151 | cb=b->callback; |
152 | if ((cb != NULL) && | |
153 | ((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0)) | |
d02b48c6 RE |
154 | return(i); |
155 | ||
156 | if (!b->init) | |
157 | { | |
df82f5c8 | 158 | BIOerr(BIO_F_BIO_READ,BIO_R_UNINITIALIZED); |
d02b48c6 RE |
159 | return(-2); |
160 | } | |
161 | ||
162 | i=b->method->bread(b,out,outl); | |
dfeab068 | 163 | |
d02b48c6 RE |
164 | if (i > 0) b->num_read+=(unsigned long)i; |
165 | ||
58964a49 RE |
166 | if (cb != NULL) |
167 | i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl, | |
d02b48c6 RE |
168 | 0L,(long)i); |
169 | return(i); | |
170 | } | |
171 | ||
6b691a5c | 172 | int BIO_write(BIO *b, const char *in, int inl) |
d02b48c6 RE |
173 | { |
174 | int i; | |
58964a49 RE |
175 | long (*cb)(); |
176 | ||
177 | if (b == NULL) | |
178 | return(0); | |
d02b48c6 | 179 | |
58964a49 RE |
180 | cb=b->callback; |
181 | if ((b->method == NULL) || (b->method->bwrite == NULL)) | |
d02b48c6 RE |
182 | { |
183 | BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD); | |
184 | return(-2); | |
185 | } | |
186 | ||
58964a49 RE |
187 | if ((cb != NULL) && |
188 | ((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0)) | |
d02b48c6 RE |
189 | return(i); |
190 | ||
191 | if (!b->init) | |
192 | { | |
df82f5c8 | 193 | BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITIALIZED); |
d02b48c6 RE |
194 | return(-2); |
195 | } | |
196 | ||
197 | i=b->method->bwrite(b,in,inl); | |
dfeab068 | 198 | |
d02b48c6 RE |
199 | if (i > 0) b->num_write+=(unsigned long)i; |
200 | ||
dfeab068 RE |
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)) */ | |
58964a49 | 208 | i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl, |
d02b48c6 RE |
209 | 0L,(long)i); |
210 | return(i); | |
211 | } | |
212 | ||
6b691a5c | 213 | int BIO_puts(BIO *b, const char *in) |
d02b48c6 RE |
214 | { |
215 | int i; | |
58964a49 | 216 | long (*cb)(); |
d02b48c6 RE |
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 | ||
58964a49 RE |
224 | cb=b->callback; |
225 | ||
226 | if ((cb != NULL) && | |
227 | ((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0)) | |
d02b48c6 RE |
228 | return(i); |
229 | ||
230 | if (!b->init) | |
231 | { | |
df82f5c8 | 232 | BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITIALIZED); |
d02b48c6 RE |
233 | return(-2); |
234 | } | |
235 | ||
236 | i=b->method->bputs(b,in); | |
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 | ||
95d29597 BM |
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. */ | |
323 | size_t BIO_ctrl_pending(BIO *bio) | |
324 | { | |
325 | return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL); | |
326 | } | |
327 | ||
328 | size_t BIO_ctrl_wpending(BIO *bio) | |
329 | { | |
330 | return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL); | |
331 | } | |
332 | ||
333 | ||
d02b48c6 | 334 | /* put the 'bio' on the end of b's list of operators */ |
6b691a5c | 335 | BIO *BIO_push(BIO *b, BIO *bio) |
d02b48c6 RE |
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; | |
58964a49 | 346 | /* called to do internal processing */ |
d02b48c6 RE |
347 | BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL); |
348 | return(b); | |
349 | } | |
350 | ||
351 | /* Remove the first and return the rest */ | |
6b691a5c | 352 | BIO *BIO_pop(BIO *b) |
d02b48c6 RE |
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 | ||
6b691a5c | 370 | BIO *BIO_get_retry_BIO(BIO *bio, int *reason) |
d02b48c6 RE |
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 | ||
6b691a5c | 386 | int BIO_get_retry_reason(BIO *bio) |
d02b48c6 RE |
387 | { |
388 | return(bio->retry_reason); | |
389 | } | |
390 | ||
6b691a5c | 391 | BIO *BIO_find_type(BIO *bio, int type) |
d02b48c6 RE |
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 | ||
6b691a5c | 413 | void BIO_free_all(BIO *bio) |
d02b48c6 RE |
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 | ||
6b691a5c | 429 | BIO *BIO_dup_chain(BIO *in) |
d02b48c6 RE |
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 | } | |
58964a49 | 450 | |
b1c4fe36 BM |
451 | /* copy app data */ |
452 | if (!CRYPTO_dup_ex_data(bio_meth,&new->ex_data,&bio->ex_data)) | |
453 | goto err; | |
58964a49 | 454 | |
d02b48c6 RE |
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); | |
467 | err: | |
468 | if (ret != NULL) | |
469 | BIO_free(ret); | |
470 | return(NULL); | |
471 | } | |
472 | ||
6b691a5c | 473 | void BIO_copy_next_retry(BIO *b) |
d02b48c6 RE |
474 | { |
475 | BIO_set_flags(b,BIO_get_retry_flags(b->next_bio)); | |
476 | b->retry_reason=b->next_bio->retry_reason; | |
477 | } | |
478 | ||
6b691a5c UM |
479 | int BIO_get_ex_new_index(long argl, char *argp, int (*new_func)(), |
480 | int (*dup_func)(), void (*free_func)()) | |
b1c4fe36 BM |
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 | } | |
58964a49 | 486 | |
6b691a5c | 487 | int BIO_set_ex_data(BIO *bio, int idx, char *data) |
58964a49 RE |
488 | { |
489 | return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data)); | |
490 | } | |
491 | ||
6b691a5c | 492 | char *BIO_get_ex_data(BIO *bio, int idx) |
58964a49 RE |
493 | { |
494 | return(CRYPTO_get_ex_data(&(bio->ex_data),idx)); | |
495 | } | |
496 |