1 /* crypto/bio/bio_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
61 #include <openssl/crypto.h>
63 #include <openssl/bio.h>
64 #include <openssl/stack.h>
66 static STACK *bio_meth=NULL;
67 static int bio_meth_num=0;
69 BIO *BIO_new(BIO_METHOD *method)
73 ret=(BIO *)Malloc(sizeof(BIO));
76 BIOerr(BIO_F_BIO_NEW,ERR_R_MALLOC_FAILURE);
79 if (!BIO_set(ret,method))
87 int BIO_set(BIO *bio, BIO_METHOD *method)
103 CRYPTO_new_ex_data(bio_meth,(char *)bio,&bio->ex_data);
104 if (method->create != NULL)
105 if (!method->create(bio))
114 if (a == NULL) return(0);
116 i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO);
120 if (i > 0) return(1);
124 fprintf(stderr,"BIO_free, bad reference count\n");
128 if ((a->callback != NULL) &&
129 ((i=(int)a->callback(a,BIO_CB_FREE,NULL,0,0L,1L)) <= 0))
132 CRYPTO_free_ex_data(bio_meth,(char *)a,&a->ex_data);
134 if ((a->method == NULL) || (a->method->destroy == NULL)) return(1);
135 ret=a->method->destroy(a);
140 int BIO_read(BIO *b, void *out, int outl)
145 if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL))
147 BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD);
153 ((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0))
158 BIOerr(BIO_F_BIO_READ,BIO_R_UNINITIALIZED);
162 i=b->method->bread(b,out,outl);
164 if (i > 0) b->num_read+=(unsigned long)i;
167 i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl,
172 int BIO_write(BIO *b, const char *in, int inl)
181 if ((b->method == NULL) || (b->method->bwrite == NULL))
183 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD);
188 ((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0))
193 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITIALIZED);
197 i=b->method->bwrite(b,in,inl);
199 if (i > 0) b->num_write+=(unsigned long)i;
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.
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,
213 int BIO_puts(BIO *b, const char *in)
218 if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL))
220 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD);
227 ((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0))
232 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITIALIZED);
236 i=b->method->bputs(b,in);
239 i=(int)cb(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0,
244 int BIO_gets(BIO *b, char *in, int inl)
249 if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL))
251 BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD);
258 ((i=(int)cb(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0))
263 BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITIALIZED);
267 i=b->method->bgets(b,in,inl);
270 i=(int)cb(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl,
275 long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
280 return(BIO_ctrl(b,cmd,larg,(char *)&i));
283 char *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
287 if (BIO_ctrl(b,cmd,larg,(char *)&p) <= 0)
293 long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
298 if (b == NULL) return(0);
300 if ((b->method == NULL) || (b->method->ctrl == NULL))
302 BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD);
309 ((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0))
312 ret=b->method->ctrl(b,cmd,larg,parg);
315 ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd,
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)
325 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
328 size_t BIO_ctrl_wpending(BIO *bio)
330 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
334 /* put the 'bio' on the end of b's list of operators */
335 BIO *BIO_push(BIO *b, BIO *bio)
339 if (b == NULL) return(bio);
341 while (lb->next_bio != NULL)
346 /* called to do internal processing */
347 BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL);
351 /* Remove the first and return the rest */
356 if (b == NULL) return(NULL);
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;
366 BIO_ctrl(b,BIO_CTRL_POP,0,NULL);
370 BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
377 if (!BIO_should_retry(b)) break;
380 if (b == NULL) break;
382 if (reason != NULL) *reason=last->retry_reason;
386 int BIO_get_retry_reason(BIO *bio)
388 return(bio->retry_reason);
391 BIO *BIO_find_type(BIO *bio, int type)
397 if (bio->method != NULL)
399 mt=bio->method->type;
403 if (mt & type) return(bio);
409 } while (bio != NULL);
413 void BIO_free_all(BIO *bio)
424 /* Since ref count > 1, don't free anyone else. */
429 BIO *BIO_dup_chain(BIO *in)
431 BIO *ret=NULL,*eoc=NULL,*bio,*new;
433 for (bio=in; bio != NULL; bio=bio->next_bio)
435 if ((new=BIO_new(bio->method)) == NULL) goto err;
436 new->callback=bio->callback;
437 new->cb_arg=bio->cb_arg;
439 new->shutdown=bio->shutdown;
440 new->flags=bio->flags;
442 /* This will let SSL_s_sock() work with stdin/stdout */
445 if (!BIO_dup_state(bio,(char *)new))
452 if (!CRYPTO_dup_ex_data(bio_meth,&new->ex_data,&bio->ex_data))
473 void BIO_copy_next_retry(BIO *b)
475 BIO_set_flags(b,BIO_get_retry_flags(b->next_bio));
476 b->retry_reason=b->next_bio->retry_reason;
479 int BIO_get_ex_new_index(long argl, char *argp, int (*new_func)(),
480 int (*dup_func)(), void (*free_func)())
483 return(CRYPTO_get_ex_new_index(bio_meth_num-1,&bio_meth,
484 argl,argp,new_func,dup_func,free_func));
487 int BIO_set_ex_data(BIO *bio, int idx, char *data)
489 return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data));
492 char *BIO_get_ex_data(BIO *bio, int idx)
494 return(CRYPTO_get_ex_data(&(bio->ex_data),idx));
497 unsigned long BIO_number_read(BIO *bio)
499 if(bio) return bio->num_read;
503 unsigned long BIO_number_written(BIO *bio)
505 if(bio) return bio->num_write;