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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 | { | |
165 | BIOerr(BIO_F_BIO_READ,BIO_R_UNINITALISED); | |
166 | return(-2); | |
167 | } | |
168 | ||
169 | i=b->method->bread(b,out,outl); | |
170 | if (i > 0) b->num_read+=(unsigned long)i; | |
171 | ||
58964a49 RE |
172 | if (cb != NULL) |
173 | i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl, | |
d02b48c6 RE |
174 | 0L,(long)i); |
175 | return(i); | |
176 | } | |
177 | ||
178 | int BIO_write(b,in,inl) | |
179 | BIO *b; | |
180 | char *in; | |
181 | int inl; | |
182 | { | |
183 | int i; | |
58964a49 RE |
184 | long (*cb)(); |
185 | ||
186 | if (b == NULL) | |
187 | return(0); | |
d02b48c6 | 188 | |
58964a49 RE |
189 | cb=b->callback; |
190 | if ((b->method == NULL) || (b->method->bwrite == NULL)) | |
d02b48c6 RE |
191 | { |
192 | BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD); | |
193 | return(-2); | |
194 | } | |
195 | ||
58964a49 RE |
196 | if ((cb != NULL) && |
197 | ((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0)) | |
d02b48c6 RE |
198 | return(i); |
199 | ||
200 | if (!b->init) | |
201 | { | |
202 | BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITALISED); | |
203 | return(-2); | |
204 | } | |
205 | ||
206 | i=b->method->bwrite(b,in,inl); | |
207 | if (i > 0) b->num_write+=(unsigned long)i; | |
208 | ||
58964a49 RE |
209 | if (cb != NULL) |
210 | i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl, | |
d02b48c6 RE |
211 | 0L,(long)i); |
212 | return(i); | |
213 | } | |
214 | ||
215 | int BIO_puts(b,in) | |
216 | BIO *b; | |
217 | char *in; | |
218 | { | |
219 | int i; | |
58964a49 | 220 | long (*cb)(); |
d02b48c6 RE |
221 | |
222 | if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) | |
223 | { | |
224 | BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD); | |
225 | return(-2); | |
226 | } | |
227 | ||
58964a49 RE |
228 | cb=b->callback; |
229 | ||
230 | if ((cb != NULL) && | |
231 | ((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0)) | |
d02b48c6 RE |
232 | return(i); |
233 | ||
234 | if (!b->init) | |
235 | { | |
236 | BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITALISED); | |
237 | return(-2); | |
238 | } | |
239 | ||
240 | i=b->method->bputs(b,in); | |
241 | ||
58964a49 RE |
242 | if (cb != NULL) |
243 | i=(int)cb(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0, | |
d02b48c6 RE |
244 | 0L,(long)i); |
245 | return(i); | |
246 | } | |
247 | ||
248 | int BIO_gets(b,in,inl) | |
249 | BIO *b; | |
250 | char *in; | |
251 | int inl; | |
252 | { | |
253 | int i; | |
58964a49 | 254 | long (*cb)(); |
d02b48c6 RE |
255 | |
256 | if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) | |
257 | { | |
258 | BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD); | |
259 | return(-2); | |
260 | } | |
261 | ||
58964a49 RE |
262 | cb=b->callback; |
263 | ||
264 | if ((cb != NULL) && | |
265 | ((i=(int)cb(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0)) | |
d02b48c6 RE |
266 | return(i); |
267 | ||
268 | if (!b->init) | |
269 | { | |
270 | BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITALISED); | |
271 | return(-2); | |
272 | } | |
273 | ||
274 | i=b->method->bgets(b,in,inl); | |
275 | ||
58964a49 RE |
276 | if (cb != NULL) |
277 | i=(int)cb(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl, | |
d02b48c6 RE |
278 | 0L,(long)i); |
279 | return(i); | |
280 | } | |
281 | ||
58964a49 | 282 | long BIO_int_ctrl(b,cmd,larg,iarg) |
d02b48c6 RE |
283 | BIO *b; |
284 | int cmd; | |
285 | long larg; | |
286 | int iarg; | |
287 | { | |
288 | int i; | |
289 | ||
290 | i=iarg; | |
291 | return(BIO_ctrl(b,cmd,larg,(char *)&i)); | |
292 | } | |
293 | ||
58964a49 RE |
294 | char *BIO_ptr_ctrl(b,cmd,larg) |
295 | BIO *b; | |
296 | int cmd; | |
297 | long larg; | |
298 | { | |
299 | char *p=NULL; | |
300 | ||
301 | if (BIO_ctrl(b,cmd,larg,(char *)&p) <= 0) | |
302 | return(NULL); | |
303 | else | |
304 | return(p); | |
305 | } | |
306 | ||
d02b48c6 RE |
307 | long BIO_ctrl(b,cmd,larg,parg) |
308 | BIO *b; | |
309 | int cmd; | |
310 | long larg; | |
311 | char *parg; | |
312 | { | |
313 | long ret; | |
58964a49 | 314 | long (*cb)(); |
d02b48c6 RE |
315 | |
316 | if (b == NULL) return(0); | |
317 | ||
318 | if ((b->method == NULL) || (b->method->ctrl == NULL)) | |
319 | { | |
320 | BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD); | |
321 | return(-2); | |
322 | } | |
323 | ||
58964a49 RE |
324 | cb=b->callback; |
325 | ||
326 | if ((cb != NULL) && | |
327 | ((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0)) | |
d02b48c6 RE |
328 | return(ret); |
329 | ||
330 | ret=b->method->ctrl(b,cmd,larg,parg); | |
331 | ||
58964a49 RE |
332 | if (cb != NULL) |
333 | ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd, | |
d02b48c6 RE |
334 | larg,ret); |
335 | return(ret); | |
336 | } | |
337 | ||
338 | /* put the 'bio' on the end of b's list of operators */ | |
339 | BIO *BIO_push(b,bio) | |
340 | BIO *b,*bio; | |
341 | { | |
342 | BIO *lb; | |
343 | ||
344 | if (b == NULL) return(bio); | |
345 | lb=b; | |
346 | while (lb->next_bio != NULL) | |
347 | lb=lb->next_bio; | |
348 | lb->next_bio=bio; | |
349 | if (bio != NULL) | |
350 | bio->prev_bio=lb; | |
58964a49 | 351 | /* called to do internal processing */ |
d02b48c6 RE |
352 | BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL); |
353 | return(b); | |
354 | } | |
355 | ||
356 | /* Remove the first and return the rest */ | |
357 | BIO *BIO_pop(b) | |
358 | BIO *b; | |
359 | { | |
360 | BIO *ret; | |
361 | ||
362 | if (b == NULL) return(NULL); | |
363 | ret=b->next_bio; | |
364 | ||
365 | if (b->prev_bio != NULL) | |
366 | b->prev_bio->next_bio=b->next_bio; | |
367 | if (b->next_bio != NULL) | |
368 | b->next_bio->prev_bio=b->prev_bio; | |
369 | ||
370 | b->next_bio=NULL; | |
371 | b->prev_bio=NULL; | |
372 | BIO_ctrl(b,BIO_CTRL_POP,0,NULL); | |
373 | return(ret); | |
374 | } | |
375 | ||
376 | BIO *BIO_get_retry_BIO(bio,reason) | |
377 | BIO *bio; | |
378 | int *reason; | |
379 | { | |
380 | BIO *b,*last; | |
381 | ||
382 | b=last=bio; | |
383 | for (;;) | |
384 | { | |
385 | if (!BIO_should_retry(b)) break; | |
386 | last=b; | |
387 | b=b->next_bio; | |
388 | if (b == NULL) break; | |
389 | } | |
390 | if (reason != NULL) *reason=last->retry_reason; | |
391 | return(last); | |
392 | } | |
393 | ||
394 | int BIO_get_retry_reason(bio) | |
395 | BIO *bio; | |
396 | { | |
397 | return(bio->retry_reason); | |
398 | } | |
399 | ||
400 | BIO *BIO_find_type(bio,type) | |
401 | BIO *bio; | |
402 | int type; | |
403 | { | |
404 | int mt,mask; | |
405 | ||
406 | mask=type&0xff; | |
407 | do { | |
408 | if (bio->method != NULL) | |
409 | { | |
410 | mt=bio->method->type; | |
411 | ||
412 | if (!mask) | |
413 | { | |
414 | if (mt & type) return(bio); | |
415 | } | |
416 | else if (mt == type) | |
417 | return(bio); | |
418 | } | |
419 | bio=bio->next_bio; | |
420 | } while (bio != NULL); | |
421 | return(NULL); | |
422 | } | |
423 | ||
424 | void BIO_free_all(bio) | |
425 | BIO *bio; | |
426 | { | |
427 | BIO *b; | |
428 | int ref; | |
429 | ||
430 | while (bio != NULL) | |
431 | { | |
432 | b=bio; | |
433 | ref=b->references; | |
434 | bio=bio->next_bio; | |
435 | BIO_free(b); | |
436 | /* Since ref count > 1, don't free anyone else. */ | |
437 | if (ref > 1) break; | |
438 | } | |
439 | } | |
440 | ||
441 | BIO *BIO_dup_chain(in) | |
442 | BIO *in; | |
443 | { | |
444 | BIO *ret=NULL,*eoc=NULL,*bio,*new; | |
445 | ||
446 | for (bio=in; bio != NULL; bio=bio->next_bio) | |
447 | { | |
448 | if ((new=BIO_new(bio->method)) == NULL) goto err; | |
449 | new->callback=bio->callback; | |
450 | new->cb_arg=bio->cb_arg; | |
451 | new->init=bio->init; | |
452 | new->shutdown=bio->shutdown; | |
453 | new->flags=bio->flags; | |
454 | ||
455 | /* This will let SSL_s_sock() work with stdin/stdout */ | |
456 | new->num=bio->num; | |
457 | ||
458 | if (!BIO_dup_state(bio,(char *)new)) | |
459 | { | |
460 | BIO_free(new); | |
461 | goto err; | |
462 | } | |
58964a49 RE |
463 | |
464 | /* copy app data */ | |
465 | if (!CRYPTO_dup_ex_data(bio_meth,&new->ex_data,&bio->ex_data)) | |
466 | goto err; | |
467 | ||
d02b48c6 RE |
468 | if (ret == NULL) |
469 | { | |
470 | eoc=new; | |
471 | ret=eoc; | |
472 | } | |
473 | else | |
474 | { | |
475 | BIO_push(eoc,new); | |
476 | eoc=new; | |
477 | } | |
478 | } | |
479 | return(ret); | |
480 | err: | |
481 | if (ret != NULL) | |
482 | BIO_free(ret); | |
483 | return(NULL); | |
484 | } | |
485 | ||
486 | void BIO_copy_next_retry(b) | |
487 | BIO *b; | |
488 | { | |
489 | BIO_set_flags(b,BIO_get_retry_flags(b->next_bio)); | |
490 | b->retry_reason=b->next_bio->retry_reason; | |
491 | } | |
492 | ||
58964a49 RE |
493 | int BIO_get_ex_new_index(argl,argp,new_func,dup_func,free_func) |
494 | long argl; | |
495 | char *argp; | |
496 | int (*new_func)(); | |
497 | int (*dup_func)(); | |
498 | void (*free_func)(); | |
499 | { | |
500 | bio_meth_num++; | |
501 | return(CRYPTO_get_ex_new_index(bio_meth_num-1,&bio_meth, | |
502 | argl,argp,new_func,dup_func,free_func)); | |
503 | } | |
504 | ||
505 | int BIO_set_ex_data(bio,idx,data) | |
506 | BIO *bio; | |
507 | int idx; | |
508 | char *data; | |
509 | { | |
510 | return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data)); | |
511 | } | |
512 | ||
513 | char *BIO_get_ex_data(bio,idx) | |
514 | BIO *bio; | |
515 | int idx; | |
516 | { | |
517 | return(CRYPTO_get_ex_data(&(bio->ex_data),idx)); | |
518 | } | |
519 |