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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.]
66 static STACK
*bio_meth
=NULL
;
67 static int bio_meth_num
=0;
74 ret
=(BIO
*)Malloc(sizeof(BIO
));
77 BIOerr(BIO_F_BIO_NEW
,ERR_R_MALLOC_FAILURE
);
80 if (!BIO_set(ret
,method
))
88 int BIO_set(bio
,method
)
106 CRYPTO_new_ex_data(bio_meth
,(char *)bio
,&bio
->ex_data
);
107 if (method
->create
!= NULL
)
108 if (!method
->create(bio
))
118 if (a
== NULL
) return(0);
120 i
=CRYPTO_add(&a
->references
,-1,CRYPTO_LOCK_BIO
);
124 if (i
> 0) return(1);
128 fprintf(stderr
,"BIO_free, bad reference count\n");
132 if ((a
->callback
!= NULL
) &&
133 ((i
=(int)a
->callback(a
,BIO_CB_FREE
,NULL
,0,0L,1L)) <= 0))
136 CRYPTO_free_ex_data(bio_meth
,(char *)a
,&a
->ex_data
);
138 if ((a
->method
== NULL
) || (a
->method
->destroy
== NULL
)) return(1);
139 ret
=a
->method
->destroy(a
);
144 int BIO_read(b
,out
,outl
)
152 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bread
== NULL
))
154 BIOerr(BIO_F_BIO_READ
,BIO_R_UNSUPPORTED_METHOD
);
160 ((i
=(int)cb(b
,BIO_CB_READ
,out
,outl
,0L,1L)) <= 0))
165 BIOerr(BIO_F_BIO_READ
,BIO_R_UNINITALISED
);
169 i
=b
->method
->bread(b
,out
,outl
);
171 if (i
> 0) b
->num_read
+=(unsigned long)i
;
174 i
=(int)cb(b
,BIO_CB_READ
|BIO_CB_RETURN
,out
,outl
,
179 int BIO_write(b
,in
,inl
)
191 if ((b
->method
== NULL
) || (b
->method
->bwrite
== NULL
))
193 BIOerr(BIO_F_BIO_WRITE
,BIO_R_UNSUPPORTED_METHOD
);
198 ((i
=(int)cb(b
,BIO_CB_WRITE
,in
,inl
,0L,1L)) <= 0))
203 BIOerr(BIO_F_BIO_WRITE
,BIO_R_UNINITALISED
);
207 i
=b
->method
->bwrite(b
,in
,inl
);
209 if (i
> 0) b
->num_write
+=(unsigned long)i
;
211 /* This is evil and not thread safe. If the BIO has been freed,
212 * we must not call the callback. The only way to be able to
213 * determine this is the reference count which is now invalid since
214 * the memory has been free()ed.
216 if (b
->references
<= 0) abort();
217 if (cb
!= NULL
) /* && (b->references >= 1)) */
218 i
=(int)cb(b
,BIO_CB_WRITE
|BIO_CB_RETURN
,in
,inl
,
230 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bputs
== NULL
))
232 BIOerr(BIO_F_BIO_PUTS
,BIO_R_UNSUPPORTED_METHOD
);
239 ((i
=(int)cb(b
,BIO_CB_PUTS
,in
,0,0L,1L)) <= 0))
244 BIOerr(BIO_F_BIO_PUTS
,BIO_R_UNINITALISED
);
248 i
=b
->method
->bputs(b
,in
);
251 i
=(int)cb(b
,BIO_CB_PUTS
|BIO_CB_RETURN
,in
,0,
256 int BIO_gets(b
,in
,inl
)
264 if ((b
== NULL
) || (b
->method
== NULL
) || (b
->method
->bgets
== NULL
))
266 BIOerr(BIO_F_BIO_GETS
,BIO_R_UNSUPPORTED_METHOD
);
273 ((i
=(int)cb(b
,BIO_CB_GETS
,in
,inl
,0L,1L)) <= 0))
278 BIOerr(BIO_F_BIO_GETS
,BIO_R_UNINITALISED
);
282 i
=b
->method
->bgets(b
,in
,inl
);
285 i
=(int)cb(b
,BIO_CB_GETS
|BIO_CB_RETURN
,in
,inl
,
290 long BIO_int_ctrl(b
,cmd
,larg
,iarg
)
299 return(BIO_ctrl(b
,cmd
,larg
,(char *)&i
));
302 char *BIO_ptr_ctrl(b
,cmd
,larg
)
309 if (BIO_ctrl(b
,cmd
,larg
,(char *)&p
) <= 0)
315 long BIO_ctrl(b
,cmd
,larg
,parg
)
324 if (b
== NULL
) return(0);
326 if ((b
->method
== NULL
) || (b
->method
->ctrl
== NULL
))
328 BIOerr(BIO_F_BIO_CTRL
,BIO_R_UNSUPPORTED_METHOD
);
335 ((ret
=cb(b
,BIO_CB_CTRL
,parg
,cmd
,larg
,1L)) <= 0))
338 ret
=b
->method
->ctrl(b
,cmd
,larg
,parg
);
341 ret
=cb(b
,BIO_CB_CTRL
|BIO_CB_RETURN
,parg
,cmd
,
346 /* put the 'bio' on the end of b's list of operators */
352 if (b
== NULL
) return(bio
);
354 while (lb
->next_bio
!= NULL
)
359 /* called to do internal processing */
360 BIO_ctrl(b
,BIO_CTRL_PUSH
,0,NULL
);
364 /* Remove the first and return the rest */
370 if (b
== NULL
) return(NULL
);
373 if (b
->prev_bio
!= NULL
)
374 b
->prev_bio
->next_bio
=b
->next_bio
;
375 if (b
->next_bio
!= NULL
)
376 b
->next_bio
->prev_bio
=b
->prev_bio
;
380 BIO_ctrl(b
,BIO_CTRL_POP
,0,NULL
);
384 BIO
*BIO_get_retry_BIO(bio
,reason
)
393 if (!BIO_should_retry(b
)) break;
396 if (b
== NULL
) break;
398 if (reason
!= NULL
) *reason
=last
->retry_reason
;
402 int BIO_get_retry_reason(bio
)
405 return(bio
->retry_reason
);
408 BIO
*BIO_find_type(bio
,type
)
416 if (bio
->method
!= NULL
)
418 mt
=bio
->method
->type
;
422 if (mt
& type
) return(bio
);
428 } while (bio
!= NULL
);
432 void BIO_free_all(bio
)
444 /* Since ref count > 1, don't free anyone else. */
449 BIO
*BIO_dup_chain(in
)
452 BIO
*ret
=NULL
,*eoc
=NULL
,*bio
,*new;
454 for (bio
=in
; bio
!= NULL
; bio
=bio
->next_bio
)
456 if ((new=BIO_new(bio
->method
)) == NULL
) goto err
;
457 new->callback
=bio
->callback
;
458 new->cb_arg
=bio
->cb_arg
;
460 new->shutdown
=bio
->shutdown
;
461 new->flags
=bio
->flags
;
463 /* This will let SSL_s_sock() work with stdin/stdout */
466 if (!BIO_dup_state(bio
,(char *)new))
473 if (!CRYPTO_dup_ex_data(bio_meth
,&new->ex_data
,&bio
->ex_data
))
494 void BIO_copy_next_retry(b
)
497 BIO_set_flags(b
,BIO_get_retry_flags(b
->next_bio
));
498 b
->retry_reason
=b
->next_bio
->retry_reason
;
501 int BIO_get_ex_new_index(argl
,argp
,new_func
,dup_func
,free_func
)
509 return(CRYPTO_get_ex_new_index(bio_meth_num
-1,&bio_meth
,
510 argl
,argp
,new_func
,dup_func
,free_func
));
513 int BIO_set_ex_data(bio
,idx
,data
)
518 return(CRYPTO_set_ex_data(&(bio
->ex_data
),idx
,data
));
521 char *BIO_get_ex_data(bio
,idx
)
525 return(CRYPTO_get_ex_data(&(bio
->ex_data
),idx
));