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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> | |
58964a49 | 61 | #include "crypto.h" |
d02b48c6 RE |
62 | #include "cryptlib.h" |
63 | #include "bio.h" | |
58964a49 RE |
64 | #include "stack.h" |
65 | ||
66 | static STACK *bio_meth=NULL; | |
67 | static int bio_meth_num=0; | |
d02b48c6 RE |
68 | |
69 | BIO *BIO_new(method) | |
70 | BIO_METHOD *method; | |
71 | { | |
72 | BIO *ret=NULL; | |
73 | ||
74 | ret=(BIO *)Malloc(sizeof(BIO)); | |
75 | if (ret == NULL) | |
76 | { | |
77 | BIOerr(BIO_F_BIO_NEW,ERR_R_MALLOC_FAILURE); | |
78 | return(NULL); | |
79 | } | |
80 | if (!BIO_set(ret,method)) | |
81 | { | |
82 | Free(ret); | |
83 | ret=NULL; | |
84 | } | |
85 | return(ret); | |
86 | } | |
87 | ||
88 | int BIO_set(bio,method) | |
89 | BIO *bio; | |
90 | BIO_METHOD *method; | |
91 | { | |
92 | bio->method=method; | |
93 | bio->callback=NULL; | |
94 | bio->cb_arg=NULL; | |
95 | bio->init=0; | |
96 | bio->shutdown=1; | |
d02b48c6 RE |
97 | bio->flags=0; |
98 | bio->retry_reason=0; | |
58964a49 | 99 | bio->num=0; |
d02b48c6 RE |
100 | bio->ptr=NULL; |
101 | bio->prev_bio=NULL; | |
102 | bio->next_bio=NULL; | |
103 | bio->references=1; | |
104 | bio->num_read=0L; | |
105 | bio->num_write=0L; | |
58964a49 | 106 | CRYPTO_new_ex_data(bio_meth,(char *)bio,&bio->ex_data); |
d02b48c6 RE |
107 | if (method->create != NULL) |
108 | if (!method->create(bio)) | |
109 | return(0); | |
110 | return(1); | |
111 | } | |
112 | ||
113 | int BIO_free(a) | |
114 | BIO *a; | |
115 | { | |
116 | int ret=0,i; | |
117 | ||
118 | if (a == NULL) return(0); | |
119 | ||
120 | i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO); | |
58964a49 RE |
121 | #ifdef REF_PRINT |
122 | REF_PRINT("BIO",a); | |
123 | #endif | |
d02b48c6 RE |
124 | if (i > 0) return(1); |
125 | #ifdef REF_CHECK | |
126 | if (i < 0) | |
127 | { | |
128 | fprintf(stderr,"BIO_free, bad reference count\n"); | |
129 | abort(); | |
130 | } | |
131 | #endif | |
132 | if ((a->callback != NULL) && | |
133 | ((i=(int)a->callback(a,BIO_CB_FREE,NULL,0,0L,1L)) <= 0)) | |
134 | return(i); | |
135 | ||
58964a49 RE |
136 | CRYPTO_free_ex_data(bio_meth,(char *)a,&a->ex_data); |
137 | ||
d02b48c6 RE |
138 | if ((a->method == NULL) || (a->method->destroy == NULL)) return(1); |
139 | ret=a->method->destroy(a); | |
140 | Free(a); | |
141 | return(1); | |
142 | } | |
143 | ||
144 | int BIO_read(b,out,outl) | |
145 | BIO *b; | |
146 | char *out; | |
147 | int outl; | |
148 | { | |
149 | int i; | |
58964a49 | 150 | long (*cb)(); |
d02b48c6 RE |
151 | |
152 | if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL)) | |
153 | { | |
154 | BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD); | |
155 | return(-2); | |
156 | } | |
157 | ||
58964a49 RE |
158 | cb=b->callback; |
159 | if ((cb != NULL) && | |
160 | ((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0)) | |
d02b48c6 RE |
161 | return(i); |
162 | ||
163 | if (!b->init) | |
164 | { | |
df82f5c8 | 165 | BIOerr(BIO_F_BIO_READ,BIO_R_UNINITIALIZED); |
d02b48c6 RE |
166 | return(-2); |
167 | } | |
168 | ||
169 | i=b->method->bread(b,out,outl); | |
dfeab068 | 170 | |
d02b48c6 RE |
171 | if (i > 0) b->num_read+=(unsigned long)i; |
172 | ||
58964a49 RE |
173 | if (cb != NULL) |
174 | i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl, | |
d02b48c6 RE |
175 | 0L,(long)i); |
176 | return(i); | |
177 | } | |
178 | ||
179 | int BIO_write(b,in,inl) | |
180 | BIO *b; | |
e778802f | 181 | const char *in; |
d02b48c6 RE |
182 | int inl; |
183 | { | |
184 | int i; | |
58964a49 RE |
185 | long (*cb)(); |
186 | ||
187 | if (b == NULL) | |
188 | return(0); | |
d02b48c6 | 189 | |
58964a49 RE |
190 | cb=b->callback; |
191 | if ((b->method == NULL) || (b->method->bwrite == NULL)) | |
d02b48c6 RE |
192 | { |
193 | BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD); | |
194 | return(-2); | |
195 | } | |
196 | ||
58964a49 RE |
197 | if ((cb != NULL) && |
198 | ((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0)) | |
d02b48c6 RE |
199 | return(i); |
200 | ||
201 | if (!b->init) | |
202 | { | |
df82f5c8 | 203 | BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITIALIZED); |
d02b48c6 RE |
204 | return(-2); |
205 | } | |
206 | ||
207 | i=b->method->bwrite(b,in,inl); | |
dfeab068 | 208 | |
d02b48c6 RE |
209 | if (i > 0) b->num_write+=(unsigned long)i; |
210 | ||
dfeab068 RE |
211 | /* This is evil and not thread safe. If the BIO has been freed, |
212 | * we must not call the callback. The only way to be able to | |
213 | * determine this is the reference count which is now invalid since | |
214 | * the memory has been free()ed. | |
215 | */ | |
216 | if (b->references <= 0) abort(); | |
217 | if (cb != NULL) /* && (b->references >= 1)) */ | |
58964a49 | 218 | i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl, |
d02b48c6 RE |
219 | 0L,(long)i); |
220 | return(i); | |
221 | } | |
222 | ||
223 | int BIO_puts(b,in) | |
224 | BIO *b; | |
e778802f | 225 | const char *in; |
d02b48c6 RE |
226 | { |
227 | int i; | |
58964a49 | 228 | long (*cb)(); |
d02b48c6 RE |
229 | |
230 | if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) | |
231 | { | |
232 | BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD); | |
233 | return(-2); | |
234 | } | |
235 | ||
58964a49 RE |
236 | cb=b->callback; |
237 | ||
238 | if ((cb != NULL) && | |
239 | ((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0)) | |
d02b48c6 RE |
240 | return(i); |
241 | ||
242 | if (!b->init) | |
243 | { | |
df82f5c8 | 244 | BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITIALIZED); |
d02b48c6 RE |
245 | return(-2); |
246 | } | |
247 | ||
248 | i=b->method->bputs(b,in); | |
249 | ||
58964a49 RE |
250 | if (cb != NULL) |
251 | i=(int)cb(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0, | |
d02b48c6 RE |
252 | 0L,(long)i); |
253 | return(i); | |
254 | } | |
255 | ||
256 | int BIO_gets(b,in,inl) | |
257 | BIO *b; | |
258 | char *in; | |
259 | int inl; | |
260 | { | |
261 | int i; | |
58964a49 | 262 | long (*cb)(); |
d02b48c6 RE |
263 | |
264 | if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) | |
265 | { | |
266 | BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD); | |
267 | return(-2); | |
268 | } | |
269 | ||
58964a49 RE |
270 | cb=b->callback; |
271 | ||
272 | if ((cb != NULL) && | |
273 | ((i=(int)cb(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0)) | |
d02b48c6 RE |
274 | return(i); |
275 | ||
276 | if (!b->init) | |
277 | { | |
df82f5c8 | 278 | BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITIALIZED); |
d02b48c6 RE |
279 | return(-2); |
280 | } | |
281 | ||
282 | i=b->method->bgets(b,in,inl); | |
283 | ||
58964a49 RE |
284 | if (cb != NULL) |
285 | i=(int)cb(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl, | |
d02b48c6 RE |
286 | 0L,(long)i); |
287 | return(i); | |
288 | } | |
289 | ||
58964a49 | 290 | long BIO_int_ctrl(b,cmd,larg,iarg) |
d02b48c6 RE |
291 | BIO *b; |
292 | int cmd; | |
293 | long larg; | |
294 | int iarg; | |
295 | { | |
296 | int i; | |
297 | ||
298 | i=iarg; | |
299 | return(BIO_ctrl(b,cmd,larg,(char *)&i)); | |
300 | } | |
301 | ||
58964a49 RE |
302 | char *BIO_ptr_ctrl(b,cmd,larg) |
303 | BIO *b; | |
304 | int cmd; | |
305 | long larg; | |
306 | { | |
307 | char *p=NULL; | |
308 | ||
309 | if (BIO_ctrl(b,cmd,larg,(char *)&p) <= 0) | |
310 | return(NULL); | |
311 | else | |
312 | return(p); | |
313 | } | |
314 | ||
d02b48c6 RE |
315 | long BIO_ctrl(b,cmd,larg,parg) |
316 | BIO *b; | |
317 | int cmd; | |
318 | long larg; | |
319 | char *parg; | |
320 | { | |
321 | long ret; | |
58964a49 | 322 | long (*cb)(); |
d02b48c6 RE |
323 | |
324 | if (b == NULL) return(0); | |
325 | ||
326 | if ((b->method == NULL) || (b->method->ctrl == NULL)) | |
327 | { | |
328 | BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD); | |
329 | return(-2); | |
330 | } | |
331 | ||
58964a49 RE |
332 | cb=b->callback; |
333 | ||
334 | if ((cb != NULL) && | |
335 | ((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0)) | |
d02b48c6 RE |
336 | return(ret); |
337 | ||
338 | ret=b->method->ctrl(b,cmd,larg,parg); | |
339 | ||
58964a49 RE |
340 | if (cb != NULL) |
341 | ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd, | |
d02b48c6 RE |
342 | larg,ret); |
343 | return(ret); | |
344 | } | |
345 | ||
346 | /* put the 'bio' on the end of b's list of operators */ | |
347 | BIO *BIO_push(b,bio) | |
348 | BIO *b,*bio; | |
349 | { | |
350 | BIO *lb; | |
351 | ||
352 | if (b == NULL) return(bio); | |
353 | lb=b; | |
354 | while (lb->next_bio != NULL) | |
355 | lb=lb->next_bio; | |
356 | lb->next_bio=bio; | |
357 | if (bio != NULL) | |
358 | bio->prev_bio=lb; | |
58964a49 | 359 | /* called to do internal processing */ |
d02b48c6 RE |
360 | BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL); |
361 | return(b); | |
362 | } | |
363 | ||
364 | /* Remove the first and return the rest */ | |
365 | BIO *BIO_pop(b) | |
366 | BIO *b; | |
367 | { | |
368 | BIO *ret; | |
369 | ||
370 | if (b == NULL) return(NULL); | |
371 | ret=b->next_bio; | |
372 | ||
373 | if (b->prev_bio != NULL) | |
374 | b->prev_bio->next_bio=b->next_bio; | |
375 | if (b->next_bio != NULL) | |
376 | b->next_bio->prev_bio=b->prev_bio; | |
377 | ||
378 | b->next_bio=NULL; | |
379 | b->prev_bio=NULL; | |
380 | BIO_ctrl(b,BIO_CTRL_POP,0,NULL); | |
381 | return(ret); | |
382 | } | |
383 | ||
384 | BIO *BIO_get_retry_BIO(bio,reason) | |
385 | BIO *bio; | |
386 | int *reason; | |
387 | { | |
388 | BIO *b,*last; | |
389 | ||
390 | b=last=bio; | |
391 | for (;;) | |
392 | { | |
393 | if (!BIO_should_retry(b)) break; | |
394 | last=b; | |
395 | b=b->next_bio; | |
396 | if (b == NULL) break; | |
397 | } | |
398 | if (reason != NULL) *reason=last->retry_reason; | |
399 | return(last); | |
400 | } | |
401 | ||
402 | int BIO_get_retry_reason(bio) | |
403 | BIO *bio; | |
404 | { | |
405 | return(bio->retry_reason); | |
406 | } | |
407 | ||
408 | BIO *BIO_find_type(bio,type) | |
409 | BIO *bio; | |
410 | int type; | |
411 | { | |
412 | int mt,mask; | |
413 | ||
414 | mask=type&0xff; | |
415 | do { | |
416 | if (bio->method != NULL) | |
417 | { | |
418 | mt=bio->method->type; | |
419 | ||
420 | if (!mask) | |
421 | { | |
422 | if (mt & type) return(bio); | |
423 | } | |
424 | else if (mt == type) | |
425 | return(bio); | |
426 | } | |
427 | bio=bio->next_bio; | |
428 | } while (bio != NULL); | |
429 | return(NULL); | |
430 | } | |
431 | ||
432 | void BIO_free_all(bio) | |
433 | BIO *bio; | |
434 | { | |
435 | BIO *b; | |
436 | int ref; | |
437 | ||
438 | while (bio != NULL) | |
439 | { | |
440 | b=bio; | |
441 | ref=b->references; | |
442 | bio=bio->next_bio; | |
443 | BIO_free(b); | |
444 | /* Since ref count > 1, don't free anyone else. */ | |
445 | if (ref > 1) break; | |
446 | } | |
447 | } | |
448 | ||
449 | BIO *BIO_dup_chain(in) | |
450 | BIO *in; | |
451 | { | |
452 | BIO *ret=NULL,*eoc=NULL,*bio,*new; | |
453 | ||
454 | for (bio=in; bio != NULL; bio=bio->next_bio) | |
455 | { | |
456 | if ((new=BIO_new(bio->method)) == NULL) goto err; | |
457 | new->callback=bio->callback; | |
458 | new->cb_arg=bio->cb_arg; | |
459 | new->init=bio->init; | |
460 | new->shutdown=bio->shutdown; | |
461 | new->flags=bio->flags; | |
462 | ||
463 | /* This will let SSL_s_sock() work with stdin/stdout */ | |
464 | new->num=bio->num; | |
465 | ||
466 | if (!BIO_dup_state(bio,(char *)new)) | |
467 | { | |
468 | BIO_free(new); | |
469 | goto err; | |
470 | } | |
58964a49 RE |
471 | |
472 | /* copy app data */ | |
473 | if (!CRYPTO_dup_ex_data(bio_meth,&new->ex_data,&bio->ex_data)) | |
474 | goto err; | |
475 | ||
d02b48c6 RE |
476 | if (ret == NULL) |
477 | { | |
478 | eoc=new; | |
479 | ret=eoc; | |
480 | } | |
481 | else | |
482 | { | |
483 | BIO_push(eoc,new); | |
484 | eoc=new; | |
485 | } | |
486 | } | |
487 | return(ret); | |
488 | err: | |
489 | if (ret != NULL) | |
490 | BIO_free(ret); | |
491 | return(NULL); | |
492 | } | |
493 | ||
494 | void BIO_copy_next_retry(b) | |
495 | BIO *b; | |
496 | { | |
497 | BIO_set_flags(b,BIO_get_retry_flags(b->next_bio)); | |
498 | b->retry_reason=b->next_bio->retry_reason; | |
499 | } | |
500 | ||
58964a49 RE |
501 | int BIO_get_ex_new_index(argl,argp,new_func,dup_func,free_func) |
502 | long argl; | |
503 | char *argp; | |
504 | int (*new_func)(); | |
505 | int (*dup_func)(); | |
506 | void (*free_func)(); | |
507 | { | |
508 | bio_meth_num++; | |
509 | return(CRYPTO_get_ex_new_index(bio_meth_num-1,&bio_meth, | |
510 | argl,argp,new_func,dup_func,free_func)); | |
511 | } | |
512 | ||
513 | int BIO_set_ex_data(bio,idx,data) | |
514 | BIO *bio; | |
515 | int idx; | |
516 | char *data; | |
517 | { | |
518 | return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data)); | |
519 | } | |
520 | ||
521 | char *BIO_get_ex_data(bio,idx) | |
522 | BIO *bio; | |
523 | int idx; | |
524 | { | |
525 | return(CRYPTO_get_ex_data(&(bio->ex_data),idx)); | |
526 | } | |
527 |