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)
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)
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)
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)
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 long BIO_callback_ctrl(BIO *b, int cmd, void (*fp)(struct bio_st *, int, const char *, int, long, long))
325 if (b == NULL) return(0);
327 if ((b->method == NULL) || (b->method->callback_ctrl == NULL))
329 BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD);
336 ((ret=cb(b,BIO_CB_CTRL,(void *)&fp,cmd,0,1L)) <= 0))
339 ret=b->method->callback_ctrl(b,cmd,fp);
342 ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,(void *)&fp,cmd,
347 /* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
348 * do; but those macros have inappropriate return type, and for interfacing
349 * from other programming languages, C macros aren't much of a help anyway. */
350 size_t BIO_ctrl_pending(BIO *bio)
352 return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
355 size_t BIO_ctrl_wpending(BIO *bio)
357 return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
361 /* put the 'bio' on the end of b's list of operators */
362 BIO *BIO_push(BIO *b, BIO *bio)
366 if (b == NULL) return(bio);
368 while (lb->next_bio != NULL)
373 /* called to do internal processing */
374 BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL);
378 /* Remove the first and return the rest */
383 if (b == NULL) return(NULL);
386 if (b->prev_bio != NULL)
387 b->prev_bio->next_bio=b->next_bio;
388 if (b->next_bio != NULL)
389 b->next_bio->prev_bio=b->prev_bio;
393 BIO_ctrl(b,BIO_CTRL_POP,0,NULL);
397 BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
404 if (!BIO_should_retry(b)) break;
407 if (b == NULL) break;
409 if (reason != NULL) *reason=last->retry_reason;
413 int BIO_get_retry_reason(BIO *bio)
415 return(bio->retry_reason);
418 BIO *BIO_find_type(BIO *bio, int type)
422 if(!bio) return NULL;
425 if (bio->method != NULL)
427 mt=bio->method->type;
431 if (mt & type) return(bio);
437 } while (bio != NULL);
441 BIO *BIO_next(BIO *b)
447 void BIO_free_all(BIO *bio)
458 /* Since ref count > 1, don't free anyone else. */
463 BIO *BIO_dup_chain(BIO *in)
465 BIO *ret=NULL,*eoc=NULL,*bio,*new;
467 for (bio=in; bio != NULL; bio=bio->next_bio)
469 if ((new=BIO_new(bio->method)) == NULL) goto err;
470 new->callback=bio->callback;
471 new->cb_arg=bio->cb_arg;
473 new->shutdown=bio->shutdown;
474 new->flags=bio->flags;
476 /* This will let SSL_s_sock() work with stdin/stdout */
479 if (!BIO_dup_state(bio,(char *)new))
486 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new->ex_data,
508 void BIO_copy_next_retry(BIO *b)
510 BIO_set_flags(b,BIO_get_retry_flags(b->next_bio));
511 b->retry_reason=b->next_bio->retry_reason;
514 int BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
515 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
517 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp,
518 new_func, dup_func, free_func);
521 int BIO_set_ex_data(BIO *bio, int idx, void *data)
523 return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data));
526 void *BIO_get_ex_data(BIO *bio, int idx)
528 return(CRYPTO_get_ex_data(&(bio->ex_data),idx));
531 unsigned long BIO_number_read(BIO *bio)
533 if(bio) return bio->num_read;
537 unsigned long BIO_number_written(BIO *bio)
539 if(bio) return bio->num_write;
543 IMPLEMENT_STACK_OF(BIO)