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 BIO *BIO_new(BIO_METHOD *method)
70 ret=(BIO *)OPENSSL_malloc(sizeof(BIO));
73 BIOerr(BIO_F_BIO_NEW,ERR_R_MALLOC_FAILURE);
76 if (!BIO_set(ret,method))
84 int BIO_set(BIO *bio, BIO_METHOD *method)
100 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
101 if (method->create != NULL)
102 if (!method->create(bio))
104 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio,
115 if (a == NULL) return(0);
117 i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO);
121 if (i > 0) return(1);
125 fprintf(stderr,"BIO_free, bad reference count\n");
129 if ((a->callback != NULL) &&
130 ((i=(int)a->callback(a,BIO_CB_FREE,NULL,0,0L,1L)) <= 0))
133 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
135 if ((a->method == NULL) || (a->method->destroy == NULL)) return(1);
136 a->method->destroy(a);
141 void BIO_vfree(BIO *a)
144 void BIO_clear_flags(BIO *b, int flags)
149 int BIO_test_flags(const BIO *b, int flags)
151 return (b->flags & flags);
154 void BIO_set_flags(BIO *b, int flags)
159 long (*BIO_get_callback(const BIO *b))(struct bio_st *,int,const char *,int, long,long)
164 void BIO_set_callback(BIO *b, long (*cb)(struct bio_st *,int,const char *,int, long,long))
169 void BIO_set_callback_arg(BIO *b, char *arg)
174 char * BIO_get_callback_arg(const BIO *b)
179 const char * BIO_method_name(const BIO *b)
181 return b->method->name;
184 int BIO_method_type(const BIO *b)
186 return b->method->type;
190 int BIO_read(BIO *b, void *out, int outl)
193 long (*cb)(BIO *,int,const char *,int,long,long);
195 if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL))
197 BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD);
203 ((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0))
208 BIOerr(BIO_F_BIO_READ,BIO_R_UNINITIALIZED);
212 i=b->method->bread(b,out,outl);
214 if (i > 0) b->num_read+=(unsigned long)i;
217 i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl,
222 int BIO_write(BIO *b, const void *in, int inl)
225 long (*cb)(BIO *,int,const char *,int,long,long);
231 if ((b->method == NULL) || (b->method->bwrite == NULL))
233 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD);
238 ((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0))
243 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITIALIZED);
247 i=b->method->bwrite(b,in,inl);
249 if (i > 0) b->num_write+=(unsigned long)i;
252 i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl,
257 int BIO_puts(BIO *b, const char *in)
260 long (*cb)(BIO *,int,const char *,int,long,long);
262 if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL))
264 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD);
271 ((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0))
276 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITIALIZED);
280 i=b->method->bputs(b,in);
282 if (i > 0) b->num_write+=(unsigned long)i;
285 i=(int)cb(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0,
290 int BIO_gets(BIO *b, char *in, int inl)
293 long (*cb)(BIO *,int,const char *,int,long,long);
295 if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL))
297 BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD);
304 ((i=(int)cb(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0))
309 BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITIALIZED);
313 i=b->method->bgets(b,in,inl);
316 i=(int)cb(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl,
321 int BIO_indent(BIO *b,int indent,int max)
328 if(BIO_puts(b," ") != 1)
333 long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
338 return(BIO_ctrl(b,cmd,larg,(char *)&i));
341 char *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
345 if (BIO_ctrl(b,cmd,larg,(char *)&p) <= 0)
351 long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
354 long (*cb)(BIO *,int,const char *,int,long,long);
356 if (b == NULL) return(0);
358 if ((b->method == NULL) || (b->method->ctrl == NULL))
360 BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD);
367 ((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0))
370 ret=b->method->ctrl(b,cmd,larg,parg);
373 ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd,
378 long BIO_callback_ctrl(BIO *b, int cmd, void (*fp)(struct bio_st *, int, const char *, int, long, long))
381 long (*cb)(BIO *,int,const char *,int,long,long);
383 if (b == NULL) return(0);
385 if ((b->method == NULL) || (b->method->callback_ctrl == NULL))
387 BIOerr(BIO_F_BIO_CALLBACK_CTRL,BIO_R_UNSUPPORTED_METHOD);
394 ((ret=cb(b,BIO_CB_CTRL,(void *)&fp,cmd,0,1L)) <= 0))
397 ret=b->method->callback_ctrl(b,cmd,fp);
400 ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,(void *)&fp,cmd,
405 /* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
406 * do; but those macros have inappropriate return type, and for interfacing
407 * from other programming languages, C macros aren't much of a help anyway. */
408 size_t BIO_ctrl_pending(BIO *bio)
410 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
413 size_t BIO_ctrl_wpending(BIO *bio)
415 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
419 /* put the 'bio' on the end of b's list of operators */
420 BIO *BIO_push(BIO *b, BIO *bio)
424 if (b == NULL) return(bio);
426 while (lb->next_bio != NULL)
431 /* called to do internal processing */
432 BIO_ctrl(b,BIO_CTRL_PUSH,0,lb);
436 /* Remove the first and return the rest */
441 if (b == NULL) return(NULL);
444 BIO_ctrl(b,BIO_CTRL_POP,0,b);
446 if (b->prev_bio != NULL)
447 b->prev_bio->next_bio=b->next_bio;
448 if (b->next_bio != NULL)
449 b->next_bio->prev_bio=b->prev_bio;
456 BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
463 if (!BIO_should_retry(b)) break;
466 if (b == NULL) break;
468 if (reason != NULL) *reason=last->retry_reason;
472 int BIO_get_retry_reason(BIO *bio)
474 return(bio->retry_reason);
477 BIO *BIO_find_type(BIO *bio, int type)
481 if(!bio) return NULL;
484 if (bio->method != NULL)
486 mt=bio->method->type;
490 if (mt & type) return(bio);
496 } while (bio != NULL);
500 BIO *BIO_next(BIO *b)
506 void BIO_free_all(BIO *bio)
517 /* Since ref count > 1, don't free anyone else. */
522 BIO *BIO_dup_chain(BIO *in)
524 BIO *ret=NULL,*eoc=NULL,*bio,*new_bio;
526 for (bio=in; bio != NULL; bio=bio->next_bio)
528 if ((new_bio=BIO_new(bio->method)) == NULL) goto err;
529 new_bio->callback=bio->callback;
530 new_bio->cb_arg=bio->cb_arg;
531 new_bio->init=bio->init;
532 new_bio->shutdown=bio->shutdown;
533 new_bio->flags=bio->flags;
535 /* This will let SSL_s_sock() work with stdin/stdout */
536 new_bio->num=bio->num;
538 if (!BIO_dup_state(bio,(char *)new_bio))
545 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new_bio->ex_data,
556 BIO_push(eoc,new_bio);
567 void BIO_copy_next_retry(BIO *b)
569 BIO_set_flags(b,BIO_get_retry_flags(b->next_bio));
570 b->retry_reason=b->next_bio->retry_reason;
573 int BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
574 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
576 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp,
577 new_func, dup_func, free_func);
580 int BIO_set_ex_data(BIO *bio, int idx, void *data)
582 return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data));
585 void *BIO_get_ex_data(BIO *bio, int idx)
587 return(CRYPTO_get_ex_data(&(bio->ex_data),idx));
590 unsigned long BIO_number_read(BIO *bio)
592 if(bio) return bio->num_read;
596 unsigned long BIO_number_written(BIO *bio)
598 if(bio) return bio->num_write;
602 IMPLEMENT_STACK_OF(BIO)