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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/bio/bio_lib.c
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 ret
=a
->method
->destroy(a
);
141 void BIO_vfree(BIO
*a
)
144 int BIO_read(BIO
*b
, void *out
, int outl
)
147 long (*cb
)(BIO
*,int,const char *,int,long,long);
149 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bread
== NULL
))
151 BIOerr(BIO_F_BIO_READ
,BIO_R_UNSUPPORTED_METHOD
);
157 ((i
=(int)cb(b
,BIO_CB_READ
,out
,outl
,0L,1L)) <= 0))
162 BIOerr(BIO_F_BIO_READ
,BIO_R_UNINITIALIZED
);
166 i
=b
->method
->bread(b
,out
,outl
);
168 if (i
> 0) b
->num_read
+=(unsigned long)i
;
171 i
=(int)cb(b
,BIO_CB_READ
|BIO_CB_RETURN
,out
,outl
,
176 int BIO_write(BIO
*b
, const void *in
, int inl
)
179 long (*cb
)(BIO
*,int,const char *,int,long,long);
185 if ((b
->method
== NULL
) || (b
->method
->bwrite
== NULL
))
187 BIOerr(BIO_F_BIO_WRITE
,BIO_R_UNSUPPORTED_METHOD
);
192 ((i
=(int)cb(b
,BIO_CB_WRITE
,in
,inl
,0L,1L)) <= 0))
197 BIOerr(BIO_F_BIO_WRITE
,BIO_R_UNINITIALIZED
);
201 i
=b
->method
->bwrite(b
,in
,inl
);
203 if (i
> 0) b
->num_write
+=(unsigned long)i
;
206 i
=(int)cb(b
,BIO_CB_WRITE
|BIO_CB_RETURN
,in
,inl
,
211 int BIO_puts(BIO
*b
, const char *in
)
214 long (*cb
)(BIO
*,int,const char *,int,long,long);
216 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bputs
== NULL
))
218 BIOerr(BIO_F_BIO_PUTS
,BIO_R_UNSUPPORTED_METHOD
);
225 ((i
=(int)cb(b
,BIO_CB_PUTS
,in
,0,0L,1L)) <= 0))
230 BIOerr(BIO_F_BIO_PUTS
,BIO_R_UNINITIALIZED
);
234 i
=b
->method
->bputs(b
,in
);
236 if (i
> 0) b
->num_write
+=(unsigned long)i
;
239 i
=(int)cb(b
,BIO_CB_PUTS
|BIO_CB_RETURN
,in
,0,
244 int BIO_gets(BIO
*b
, char *in
, int inl
)
247 long (*cb
)(BIO
*,int,const char *,int,long,long);
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 int BIO_indent(BIO
*b
,int indent
,int max
)
282 if(BIO_puts(b
," ") != 1)
287 long BIO_int_ctrl(BIO
*b
, int cmd
, long larg
, int iarg
)
292 return(BIO_ctrl(b
,cmd
,larg
,(char *)&i
));
295 char *BIO_ptr_ctrl(BIO
*b
, int cmd
, long larg
)
299 if (BIO_ctrl(b
,cmd
,larg
,(char *)&p
) <= 0)
305 long BIO_ctrl(BIO
*b
, int cmd
, long larg
, void *parg
)
308 long (*cb
)(BIO
*,int,const char *,int,long,long);
310 if (b
== NULL
) return(0);
312 if ((b
->method
== NULL
) || (b
->method
->ctrl
== NULL
))
314 BIOerr(BIO_F_BIO_CTRL
,BIO_R_UNSUPPORTED_METHOD
);
321 ((ret
=cb(b
,BIO_CB_CTRL
,parg
,cmd
,larg
,1L)) <= 0))
324 ret
=b
->method
->ctrl(b
,cmd
,larg
,parg
);
327 ret
=cb(b
,BIO_CB_CTRL
|BIO_CB_RETURN
,parg
,cmd
,
332 long BIO_callback_ctrl(BIO
*b
, int cmd
, void (*fp
)(struct bio_st
*, int, const char *, int, long, long))
335 long (*cb
)(BIO
*,int,const char *,int,long,long);
337 if (b
== NULL
) return(0);
339 if ((b
->method
== NULL
) || (b
->method
->callback_ctrl
== NULL
))
341 BIOerr(BIO_F_BIO_CALLBACK_CTRL
,BIO_R_UNSUPPORTED_METHOD
);
348 ((ret
=cb(b
,BIO_CB_CTRL
,(void *)&fp
,cmd
,0,1L)) <= 0))
351 ret
=b
->method
->callback_ctrl(b
,cmd
,fp
);
354 ret
=cb(b
,BIO_CB_CTRL
|BIO_CB_RETURN
,(void *)&fp
,cmd
,
359 /* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
360 * do; but those macros have inappropriate return type, and for interfacing
361 * from other programming languages, C macros aren't much of a help anyway. */
362 size_t BIO_ctrl_pending(BIO
*bio
)
364 return BIO_ctrl(bio
, BIO_CTRL_PENDING
, 0, NULL
);
367 size_t BIO_ctrl_wpending(BIO
*bio
)
369 return BIO_ctrl(bio
, BIO_CTRL_WPENDING
, 0, NULL
);
373 /* put the 'bio' on the end of b's list of operators */
374 BIO
*BIO_push(BIO
*b
, BIO
*bio
)
378 if (b
== NULL
) return(bio
);
380 while (lb
->next_bio
!= NULL
)
385 /* called to do internal processing */
386 BIO_ctrl(b
,BIO_CTRL_PUSH
,0,NULL
);
390 /* Remove the first and return the rest */
395 if (b
== NULL
) return(NULL
);
398 BIO_ctrl(b
,BIO_CTRL_POP
,0,NULL
);
400 if (b
->prev_bio
!= NULL
)
401 b
->prev_bio
->next_bio
=b
->next_bio
;
402 if (b
->next_bio
!= NULL
)
403 b
->next_bio
->prev_bio
=b
->prev_bio
;
410 BIO
*BIO_get_retry_BIO(BIO
*bio
, int *reason
)
417 if (!BIO_should_retry(b
)) break;
420 if (b
== NULL
) break;
422 if (reason
!= NULL
) *reason
=last
->retry_reason
;
426 int BIO_get_retry_reason(BIO
*bio
)
428 return(bio
->retry_reason
);
431 BIO
*BIO_find_type(BIO
*bio
, int type
)
435 if(!bio
) return NULL
;
438 if (bio
->method
!= NULL
)
440 mt
=bio
->method
->type
;
444 if (mt
& type
) return(bio
);
450 } while (bio
!= NULL
);
454 BIO
*BIO_next(BIO
*b
)
460 void BIO_free_all(BIO
*bio
)
471 /* Since ref count > 1, don't free anyone else. */
476 BIO
*BIO_dup_chain(BIO
*in
)
478 BIO
*ret
=NULL
,*eoc
=NULL
,*bio
,*new;
480 for (bio
=in
; bio
!= NULL
; bio
=bio
->next_bio
)
482 if ((new=BIO_new(bio
->method
)) == NULL
) goto err
;
483 new->callback
=bio
->callback
;
484 new->cb_arg
=bio
->cb_arg
;
486 new->shutdown
=bio
->shutdown
;
487 new->flags
=bio
->flags
;
489 /* This will let SSL_s_sock() work with stdin/stdout */
492 if (!BIO_dup_state(bio
,(char *)new))
499 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO
, &new->ex_data
,
521 void BIO_copy_next_retry(BIO
*b
)
523 BIO_set_flags(b
,BIO_get_retry_flags(b
->next_bio
));
524 b
->retry_reason
=b
->next_bio
->retry_reason
;
527 int BIO_get_ex_new_index(long argl
, void *argp
, CRYPTO_EX_new
*new_func
,
528 CRYPTO_EX_dup
*dup_func
, CRYPTO_EX_free
*free_func
)
530 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO
, argl
, argp
,
531 new_func
, dup_func
, free_func
);
534 int BIO_set_ex_data(BIO
*bio
, int idx
, void *data
)
536 return(CRYPTO_set_ex_data(&(bio
->ex_data
),idx
,data
));
539 void *BIO_get_ex_data(BIO
*bio
, int idx
)
541 return(CRYPTO_get_ex_data(&(bio
->ex_data
),idx
));
544 unsigned long BIO_number_read(BIO
*bio
)
546 if(bio
) return bio
->num_read
;
550 unsigned long BIO_number_written(BIO
*bio
)
552 if(bio
) return bio
->num_write
;
556 IMPLEMENT_STACK_OF(BIO
)