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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 static STACK_OF(CRYPTO_EX_DATA_FUNCS
) *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
,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
,a
,&a
->ex_data
);
134 if ((a
->method
== NULL
) || (a
->method
->destroy
== NULL
)) return(1);
135 ret
=a
->method
->destroy(a
);
140 void BIO_vfree(BIO
*a
)
143 int BIO_read(BIO
*b
, void *out
, int outl
)
148 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bread
== NULL
))
150 BIOerr(BIO_F_BIO_READ
,BIO_R_UNSUPPORTED_METHOD
);
156 ((i
=(int)cb(b
,BIO_CB_READ
,out
,outl
,0L,1L)) <= 0))
161 BIOerr(BIO_F_BIO_READ
,BIO_R_UNINITIALIZED
);
165 i
=b
->method
->bread(b
,out
,outl
);
167 if (i
> 0) b
->num_read
+=(unsigned long)i
;
170 i
=(int)cb(b
,BIO_CB_READ
|BIO_CB_RETURN
,out
,outl
,
175 int BIO_write(BIO
*b
, const void *in
, int inl
)
184 if ((b
->method
== NULL
) || (b
->method
->bwrite
== NULL
))
186 BIOerr(BIO_F_BIO_WRITE
,BIO_R_UNSUPPORTED_METHOD
);
191 ((i
=(int)cb(b
,BIO_CB_WRITE
,in
,inl
,0L,1L)) <= 0))
196 BIOerr(BIO_F_BIO_WRITE
,BIO_R_UNINITIALIZED
);
200 i
=b
->method
->bwrite(b
,in
,inl
);
202 if (i
> 0) b
->num_write
+=(unsigned long)i
;
204 /* This is evil and not thread safe. If the BIO has been freed,
205 * we must not call the callback. The only way to be able to
206 * determine this is the reference count which is now invalid since
207 * the memory has been free()ed.
209 if (b
->references
<= 0) abort();
210 if (cb
!= NULL
) /* && (b->references >= 1)) */
211 i
=(int)cb(b
,BIO_CB_WRITE
|BIO_CB_RETURN
,in
,inl
,
216 int BIO_puts(BIO
*b
, const char *in
)
221 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bputs
== NULL
))
223 BIOerr(BIO_F_BIO_PUTS
,BIO_R_UNSUPPORTED_METHOD
);
230 ((i
=(int)cb(b
,BIO_CB_PUTS
,in
,0,0L,1L)) <= 0))
235 BIOerr(BIO_F_BIO_PUTS
,BIO_R_UNINITIALIZED
);
239 i
=b
->method
->bputs(b
,in
);
242 i
=(int)cb(b
,BIO_CB_PUTS
|BIO_CB_RETURN
,in
,0,
247 int BIO_gets(BIO
*b
, char *in
, int inl
)
252 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bgets
== NULL
))
254 BIOerr(BIO_F_BIO_GETS
,BIO_R_UNSUPPORTED_METHOD
);
261 ((i
=(int)cb(b
,BIO_CB_GETS
,in
,inl
,0L,1L)) <= 0))
266 BIOerr(BIO_F_BIO_GETS
,BIO_R_UNINITIALIZED
);
270 i
=b
->method
->bgets(b
,in
,inl
);
273 i
=(int)cb(b
,BIO_CB_GETS
|BIO_CB_RETURN
,in
,inl
,
278 long BIO_int_ctrl(BIO
*b
, int cmd
, long larg
, int iarg
)
283 return(BIO_ctrl(b
,cmd
,larg
,(char *)&i
));
286 char *BIO_ptr_ctrl(BIO
*b
, int cmd
, long larg
)
290 if (BIO_ctrl(b
,cmd
,larg
,(char *)&p
) <= 0)
296 long BIO_ctrl(BIO
*b
, int cmd
, long larg
, void *parg
)
301 if (b
== NULL
) return(0);
303 if ((b
->method
== NULL
) || (b
->method
->ctrl
== NULL
))
305 BIOerr(BIO_F_BIO_CTRL
,BIO_R_UNSUPPORTED_METHOD
);
312 ((ret
=cb(b
,BIO_CB_CTRL
,parg
,cmd
,larg
,1L)) <= 0))
315 ret
=b
->method
->ctrl(b
,cmd
,larg
,parg
);
318 ret
=cb(b
,BIO_CB_CTRL
|BIO_CB_RETURN
,parg
,cmd
,
323 long BIO_callback_ctrl(BIO
*b
, int cmd
, void (*fp
)(struct bio_st
*, int, const char *, int, long, long))
328 if (b
== NULL
) return(0);
330 if ((b
->method
== NULL
) || (b
->method
->callback_ctrl
== NULL
))
332 BIOerr(BIO_F_BIO_CTRL
,BIO_R_UNSUPPORTED_METHOD
);
339 ((ret
=cb(b
,BIO_CB_CTRL
,(void *)&fp
,cmd
,0,1L)) <= 0))
342 ret
=b
->method
->callback_ctrl(b
,cmd
,fp
);
345 ret
=cb(b
,BIO_CB_CTRL
|BIO_CB_RETURN
,(void *)&fp
,cmd
,
350 /* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
351 * do; but those macros have inappropriate return type, and for interfacing
352 * from other programming languages, C macros aren't much of a help anyway. */
353 size_t BIO_ctrl_pending(BIO
*bio
)
355 return BIO_ctrl(bio
, BIO_CTRL_PENDING
, 0, NULL
);
358 size_t BIO_ctrl_wpending(BIO
*bio
)
360 return BIO_ctrl(bio
, BIO_CTRL_WPENDING
, 0, NULL
);
364 /* put the 'bio' on the end of b's list of operators */
365 BIO
*BIO_push(BIO
*b
, BIO
*bio
)
369 if (b
== NULL
) return(bio
);
371 while (lb
->next_bio
!= NULL
)
376 /* called to do internal processing */
377 BIO_ctrl(b
,BIO_CTRL_PUSH
,0,NULL
);
381 /* Remove the first and return the rest */
386 if (b
== NULL
) return(NULL
);
389 if (b
->prev_bio
!= NULL
)
390 b
->prev_bio
->next_bio
=b
->next_bio
;
391 if (b
->next_bio
!= NULL
)
392 b
->next_bio
->prev_bio
=b
->prev_bio
;
396 BIO_ctrl(b
,BIO_CTRL_POP
,0,NULL
);
400 BIO
*BIO_get_retry_BIO(BIO
*bio
, int *reason
)
407 if (!BIO_should_retry(b
)) break;
410 if (b
== NULL
) break;
412 if (reason
!= NULL
) *reason
=last
->retry_reason
;
416 int BIO_get_retry_reason(BIO
*bio
)
418 return(bio
->retry_reason
);
421 BIO
*BIO_find_type(BIO
*bio
, int type
)
427 if (bio
->method
!= NULL
)
429 mt
=bio
->method
->type
;
433 if (mt
& type
) return(bio
);
439 } while (bio
!= NULL
);
443 void BIO_free_all(BIO
*bio
)
454 /* Since ref count > 1, don't free anyone else. */
459 BIO
*BIO_dup_chain(BIO
*in
)
461 BIO
*ret
=NULL
,*eoc
=NULL
,*bio
,*new;
463 for (bio
=in
; bio
!= NULL
; bio
=bio
->next_bio
)
465 if ((new=BIO_new(bio
->method
)) == NULL
) goto err
;
466 new->callback
=bio
->callback
;
467 new->cb_arg
=bio
->cb_arg
;
469 new->shutdown
=bio
->shutdown
;
470 new->flags
=bio
->flags
;
472 /* This will let SSL_s_sock() work with stdin/stdout */
475 if (!BIO_dup_state(bio
,(char *)new))
482 if (!CRYPTO_dup_ex_data(bio_meth
,&new->ex_data
,&bio
->ex_data
))
503 void BIO_copy_next_retry(BIO
*b
)
505 BIO_set_flags(b
,BIO_get_retry_flags(b
->next_bio
));
506 b
->retry_reason
=b
->next_bio
->retry_reason
;
509 int BIO_get_ex_new_index(long argl
, void *argp
, CRYPTO_EX_new
*new_func
,
510 CRYPTO_EX_dup
*dup_func
, CRYPTO_EX_free
*free_func
)
513 return(CRYPTO_get_ex_new_index(bio_meth_num
-1,&bio_meth
,
514 argl
,argp
,new_func
,dup_func
,free_func
));
517 int BIO_set_ex_data(BIO
*bio
, int idx
, void *data
)
519 return(CRYPTO_set_ex_data(&(bio
->ex_data
),idx
,data
));
522 void *BIO_get_ex_data(BIO
*bio
, int idx
)
524 return(CRYPTO_get_ex_data(&(bio
->ex_data
),idx
));
527 unsigned long BIO_number_read(BIO
*bio
)
529 if(bio
) return bio
->num_read
;
533 unsigned long BIO_number_written(BIO
*bio
)
535 if(bio
) return bio
->num_write
;
539 IMPLEMENT_STACK_OF(BIO
)