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1 | /* crypto/bio/bio_lib.c */ |
2 | /* Copyright (C) 1995-1997 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 "cryptlib.h" | |
62 | #include "bio.h" | |
63 | ||
64 | BIO *BIO_new(method) | |
65 | BIO_METHOD *method; | |
66 | { | |
67 | BIO *ret=NULL; | |
68 | ||
69 | ret=(BIO *)Malloc(sizeof(BIO)); | |
70 | if (ret == NULL) | |
71 | { | |
72 | BIOerr(BIO_F_BIO_NEW,ERR_R_MALLOC_FAILURE); | |
73 | return(NULL); | |
74 | } | |
75 | if (!BIO_set(ret,method)) | |
76 | { | |
77 | Free(ret); | |
78 | ret=NULL; | |
79 | } | |
80 | return(ret); | |
81 | } | |
82 | ||
83 | int BIO_set(bio,method) | |
84 | BIO *bio; | |
85 | BIO_METHOD *method; | |
86 | { | |
87 | bio->method=method; | |
88 | bio->callback=NULL; | |
89 | bio->cb_arg=NULL; | |
90 | bio->init=0; | |
91 | bio->shutdown=1; | |
92 | bio->num=0; | |
93 | bio->flags=0; | |
94 | bio->retry_reason=0; | |
95 | bio->ptr=NULL; | |
96 | bio->prev_bio=NULL; | |
97 | bio->next_bio=NULL; | |
98 | bio->references=1; | |
99 | bio->num_read=0L; | |
100 | bio->num_write=0L; | |
101 | if (method->create != NULL) | |
102 | if (!method->create(bio)) | |
103 | return(0); | |
104 | return(1); | |
105 | } | |
106 | ||
107 | int BIO_free(a) | |
108 | BIO *a; | |
109 | { | |
110 | int ret=0,i; | |
111 | ||
112 | if (a == NULL) return(0); | |
113 | ||
114 | i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO); | |
115 | ||
116 | if (i > 0) return(1); | |
117 | #ifdef REF_CHECK | |
118 | if (i < 0) | |
119 | { | |
120 | fprintf(stderr,"BIO_free, bad reference count\n"); | |
121 | abort(); | |
122 | } | |
123 | #endif | |
124 | if ((a->callback != NULL) && | |
125 | ((i=(int)a->callback(a,BIO_CB_FREE,NULL,0,0L,1L)) <= 0)) | |
126 | return(i); | |
127 | ||
128 | if ((a->method == NULL) || (a->method->destroy == NULL)) return(1); | |
129 | ret=a->method->destroy(a); | |
130 | Free(a); | |
131 | return(1); | |
132 | } | |
133 | ||
134 | int BIO_read(b,out,outl) | |
135 | BIO *b; | |
136 | char *out; | |
137 | int outl; | |
138 | { | |
139 | int i; | |
140 | ||
141 | if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL)) | |
142 | { | |
143 | BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD); | |
144 | return(-2); | |
145 | } | |
146 | ||
147 | if ((b->callback != NULL) && | |
148 | ((i=(int)b->callback(b,BIO_CB_READ,out,outl,0L,1L)) <= 0)) | |
149 | return(i); | |
150 | ||
151 | if (!b->init) | |
152 | { | |
153 | BIOerr(BIO_F_BIO_READ,BIO_R_UNINITALISED); | |
154 | return(-2); | |
155 | } | |
156 | ||
157 | i=b->method->bread(b,out,outl); | |
158 | if (i > 0) b->num_read+=(unsigned long)i; | |
159 | ||
160 | if (b->callback != NULL) | |
161 | i=(int)b->callback(b,BIO_CB_READ|BIO_CB_RETURN,out,outl, | |
162 | 0L,(long)i); | |
163 | return(i); | |
164 | } | |
165 | ||
166 | int BIO_write(b,in,inl) | |
167 | BIO *b; | |
168 | char *in; | |
169 | int inl; | |
170 | { | |
171 | int i; | |
172 | ||
173 | if ((b == NULL) || (b->method == NULL) || (b->method->bwrite == NULL)) | |
174 | { | |
175 | BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD); | |
176 | return(-2); | |
177 | } | |
178 | ||
179 | if ((b->callback != NULL) && | |
180 | ((i=(int)b->callback(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0)) | |
181 | return(i); | |
182 | ||
183 | if (!b->init) | |
184 | { | |
185 | BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITALISED); | |
186 | return(-2); | |
187 | } | |
188 | ||
189 | i=b->method->bwrite(b,in,inl); | |
190 | if (i > 0) b->num_write+=(unsigned long)i; | |
191 | ||
192 | if (b->callback != NULL) | |
193 | i=(int)b->callback(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl, | |
194 | 0L,(long)i); | |
195 | return(i); | |
196 | } | |
197 | ||
198 | int BIO_puts(b,in) | |
199 | BIO *b; | |
200 | char *in; | |
201 | { | |
202 | int i; | |
203 | ||
204 | if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) | |
205 | { | |
206 | BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD); | |
207 | return(-2); | |
208 | } | |
209 | ||
210 | if ((b->callback != NULL) && | |
211 | ((i=(int)b->callback(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0)) | |
212 | return(i); | |
213 | ||
214 | if (!b->init) | |
215 | { | |
216 | BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITALISED); | |
217 | return(-2); | |
218 | } | |
219 | ||
220 | i=b->method->bputs(b,in); | |
221 | ||
222 | if (b->callback != NULL) | |
223 | i=(int)b->callback(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0, | |
224 | 0L,(long)i); | |
225 | return(i); | |
226 | } | |
227 | ||
228 | int BIO_gets(b,in,inl) | |
229 | BIO *b; | |
230 | char *in; | |
231 | int inl; | |
232 | { | |
233 | int i; | |
234 | ||
235 | if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) | |
236 | { | |
237 | BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD); | |
238 | return(-2); | |
239 | } | |
240 | ||
241 | if ((b->callback != NULL) && | |
242 | ((i=(int)b->callback(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0)) | |
243 | return(i); | |
244 | ||
245 | if (!b->init) | |
246 | { | |
247 | BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITALISED); | |
248 | return(-2); | |
249 | } | |
250 | ||
251 | i=b->method->bgets(b,in,inl); | |
252 | ||
253 | if (b->callback != NULL) | |
254 | i=(int)b->callback(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl, | |
255 | 0L,(long)i); | |
256 | return(i); | |
257 | } | |
258 | ||
259 | long BIO_ctrl_int(b,cmd,larg,iarg) | |
260 | BIO *b; | |
261 | int cmd; | |
262 | long larg; | |
263 | int iarg; | |
264 | { | |
265 | int i; | |
266 | ||
267 | i=iarg; | |
268 | return(BIO_ctrl(b,cmd,larg,(char *)&i)); | |
269 | } | |
270 | ||
271 | long BIO_ctrl(b,cmd,larg,parg) | |
272 | BIO *b; | |
273 | int cmd; | |
274 | long larg; | |
275 | char *parg; | |
276 | { | |
277 | long ret; | |
278 | ||
279 | if (b == NULL) return(0); | |
280 | ||
281 | if ((b->method == NULL) || (b->method->ctrl == NULL)) | |
282 | { | |
283 | BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD); | |
284 | return(-2); | |
285 | } | |
286 | ||
287 | if ((b->callback != NULL) && | |
288 | ((ret=b->callback(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0)) | |
289 | return(ret); | |
290 | ||
291 | ret=b->method->ctrl(b,cmd,larg,parg); | |
292 | ||
293 | if (b->callback != NULL) | |
294 | ret=b->callback(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd, | |
295 | larg,ret); | |
296 | return(ret); | |
297 | } | |
298 | ||
299 | /* put the 'bio' on the end of b's list of operators */ | |
300 | BIO *BIO_push(b,bio) | |
301 | BIO *b,*bio; | |
302 | { | |
303 | BIO *lb; | |
304 | ||
305 | if (b == NULL) return(bio); | |
306 | lb=b; | |
307 | while (lb->next_bio != NULL) | |
308 | lb=lb->next_bio; | |
309 | lb->next_bio=bio; | |
310 | if (bio != NULL) | |
311 | bio->prev_bio=lb; | |
312 | BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL); | |
313 | return(b); | |
314 | } | |
315 | ||
316 | /* Remove the first and return the rest */ | |
317 | BIO *BIO_pop(b) | |
318 | BIO *b; | |
319 | { | |
320 | BIO *ret; | |
321 | ||
322 | if (b == NULL) return(NULL); | |
323 | ret=b->next_bio; | |
324 | ||
325 | if (b->prev_bio != NULL) | |
326 | b->prev_bio->next_bio=b->next_bio; | |
327 | if (b->next_bio != NULL) | |
328 | b->next_bio->prev_bio=b->prev_bio; | |
329 | ||
330 | b->next_bio=NULL; | |
331 | b->prev_bio=NULL; | |
332 | BIO_ctrl(b,BIO_CTRL_POP,0,NULL); | |
333 | return(ret); | |
334 | } | |
335 | ||
336 | BIO *BIO_get_retry_BIO(bio,reason) | |
337 | BIO *bio; | |
338 | int *reason; | |
339 | { | |
340 | BIO *b,*last; | |
341 | ||
342 | b=last=bio; | |
343 | for (;;) | |
344 | { | |
345 | if (!BIO_should_retry(b)) break; | |
346 | last=b; | |
347 | b=b->next_bio; | |
348 | if (b == NULL) break; | |
349 | } | |
350 | if (reason != NULL) *reason=last->retry_reason; | |
351 | return(last); | |
352 | } | |
353 | ||
354 | int BIO_get_retry_reason(bio) | |
355 | BIO *bio; | |
356 | { | |
357 | return(bio->retry_reason); | |
358 | } | |
359 | ||
360 | BIO *BIO_find_type(bio,type) | |
361 | BIO *bio; | |
362 | int type; | |
363 | { | |
364 | int mt,mask; | |
365 | ||
366 | mask=type&0xff; | |
367 | do { | |
368 | if (bio->method != NULL) | |
369 | { | |
370 | mt=bio->method->type; | |
371 | ||
372 | if (!mask) | |
373 | { | |
374 | if (mt & type) return(bio); | |
375 | } | |
376 | else if (mt == type) | |
377 | return(bio); | |
378 | } | |
379 | bio=bio->next_bio; | |
380 | } while (bio != NULL); | |
381 | return(NULL); | |
382 | } | |
383 | ||
384 | void BIO_free_all(bio) | |
385 | BIO *bio; | |
386 | { | |
387 | BIO *b; | |
388 | int ref; | |
389 | ||
390 | while (bio != NULL) | |
391 | { | |
392 | b=bio; | |
393 | ref=b->references; | |
394 | bio=bio->next_bio; | |
395 | BIO_free(b); | |
396 | /* Since ref count > 1, don't free anyone else. */ | |
397 | if (ref > 1) break; | |
398 | } | |
399 | } | |
400 | ||
401 | BIO *BIO_dup_chain(in) | |
402 | BIO *in; | |
403 | { | |
404 | BIO *ret=NULL,*eoc=NULL,*bio,*new; | |
405 | ||
406 | for (bio=in; bio != NULL; bio=bio->next_bio) | |
407 | { | |
408 | if ((new=BIO_new(bio->method)) == NULL) goto err; | |
409 | new->callback=bio->callback; | |
410 | new->cb_arg=bio->cb_arg; | |
411 | new->init=bio->init; | |
412 | new->shutdown=bio->shutdown; | |
413 | new->flags=bio->flags; | |
414 | ||
415 | /* This will let SSL_s_sock() work with stdin/stdout */ | |
416 | new->num=bio->num; | |
417 | ||
418 | if (!BIO_dup_state(bio,(char *)new)) | |
419 | { | |
420 | BIO_free(new); | |
421 | goto err; | |
422 | } | |
423 | if (ret == NULL) | |
424 | { | |
425 | eoc=new; | |
426 | ret=eoc; | |
427 | } | |
428 | else | |
429 | { | |
430 | BIO_push(eoc,new); | |
431 | eoc=new; | |
432 | } | |
433 | } | |
434 | return(ret); | |
435 | err: | |
436 | if (ret != NULL) | |
437 | BIO_free(ret); | |
438 | return(NULL); | |
439 | } | |
440 | ||
441 | void BIO_copy_next_retry(b) | |
442 | BIO *b; | |
443 | { | |
444 | BIO_set_flags(b,BIO_get_retry_flags(b->next_bio)); | |
445 | b->retry_reason=b->next_bio->retry_reason; | |
446 | } | |
447 |