/* crypto/bio/bio_lib.c *//* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. *  * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to.  The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code.  The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). *  * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. *  * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *    "This product includes cryptographic software written by *     Eric Young (eay@cryptsoft.com)" *    The word 'cryptographic' can be left out if the rouines from the library *    being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from  *    the apps directory (application code) you must include an acknowledgement: *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" *  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. *  * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed.  i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */#include <stdio.h>#include <errno.h>#include <openssl/crypto.h>#include "cryptlib.h"#include <openssl/bio.h>#include <openssl/stack.h>BIO *BIO_new(BIO_METHOD *method)	{	BIO *ret=NULL;	ret=(BIO *)OPENSSL_malloc(sizeof(BIO));	if (ret == NULL)		{		BIOerr(BIO_F_BIO_NEW,ERR_R_MALLOC_FAILURE);		return(NULL);		}	if (!BIO_set(ret,method))		{		OPENSSL_free(ret);		ret=NULL;		}	return(ret);	}int BIO_set(BIO *bio, BIO_METHOD *method)	{	bio->method=method;	bio->callback=NULL;	bio->cb_arg=NULL;	bio->init=0;	bio->shutdown=1;	bio->flags=0;	bio->retry_reason=0;	bio->num=0;	bio->ptr=NULL;	bio->prev_bio=NULL;	bio->next_bio=NULL;	bio->references=1;	bio->num_read=0L;	bio->num_write=0L;	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);	if (method->create != NULL)		if (!method->create(bio))			{			CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio,					&bio->ex_data);			return(0);			}	return(1);	}int BIO_free(BIO *a)	{	int ret=0,i;	if (a == NULL) return(0);	i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO);#ifdef REF_PRINT	REF_PRINT("BIO",a);#endif	if (i > 0) return(1);#ifdef REF_CHECK	if (i < 0)		{		fprintf(stderr,"BIO_free, bad reference count\n");		abort();		}#endif	if ((a->callback != NULL) &&		((i=(int)a->callback(a,BIO_CB_FREE,NULL,0,0L,1L)) <= 0))			return(i);	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);	if ((a->method == NULL) || (a->method->destroy == NULL)) return(1);	ret=a->method->destroy(a);	OPENSSL_free(a);	return(1);	}void BIO_vfree(BIO *a)    { BIO_free(a); }void BIO_clear_flags(BIO *b, int flags)	{	b->flags &= ~flags;	}int	BIO_test_flags(const BIO *b, int flags)	{	return (b->flags & flags);	}void	BIO_set_flags(BIO *b, int flags)	{	b->flags |= flags;	}long (*BIO_get_callback(const BIO *b))(struct bio_st *,int,const char *,int, long,long)	{	return b->callback;	}void BIO_set_callback(BIO *b, long (*cb)(struct bio_st *,int,const char *,int, long,long))	{	b->callback = cb;	}void BIO_set_callback_arg(BIO *b, char *arg)	{	b->cb_arg = arg;	}char * BIO_get_callback_arg(const BIO *b)	{	return b->cb_arg;	}const char * BIO_method_name(const BIO *b)	{	return b->method->name;	}int BIO_method_type(const BIO *b)	{	return b->method->type;	}int BIO_read(BIO *b, void *out, int outl)	{	int i;	long (*cb)(BIO *,int,const char *,int,long,long);	if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL))		{		BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD);		return(-2);		}	cb=b->callback;	if ((cb != NULL) &&		((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0))			return(i);	if (!b->init)		{		BIOerr(BIO_F_BIO_READ,BIO_R_UNINITIALIZED);		return(-2);		}	i=b->method->bread(b,out,outl);	if (i > 0) b->num_read+=(unsigned long)i;	if (cb != NULL)		i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl,			0L,(long)i);	return(i);	}int BIO_write(BIO *b, const void *in, int inl)	{	int i;	long (*cb)(BIO *,int,const char *,int,long,long);	if (b == NULL)		return(0);	cb=b->callback;	if ((b->method == NULL) || (b->method->bwrite == NULL))		{		BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD);		return(-2);		}	if ((cb != NULL) &&		((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0))			return(i);	if (!b->init)		{		BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITIALIZED);		return(-2);		}	i=b->method->bwrite(b,in,inl);	if (i > 0) b->num_write+=(unsigned long)i;	if (cb != NULL)		i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl,			0L,(long)i);	return(i);	}int BIO_puts(BIO *b, const char *in)	{	int i;	long (*cb)(BIO *,int,const char *,int,long,long);	if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL))		{		BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD);		return(-2);		}	cb=b->callback;	if ((cb != NULL) &&		((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0))			return(i);	if (!b->init)		{		BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITIALIZED);		return(-2);		}	i=b->method->bputs(b,in);	if (i > 0) b->num_write+=(unsigned long)i;	if (cb != NULL)		i=(int)cb(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0,			0L,(long)i);	return(i);	}int BIO_gets(BIO *b, char *in, int inl)	{	int i;	long (*cb)(BIO *,int,const char *,int,long,long);	if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL))		{		BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD);		return(-2);		}	cb=b->callback;	if ((cb != NULL) &&		((i=(int)cb(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0))			return(i);	if (!b->init)		{		BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITIALIZED);		return(-2);		}	i=b->method->bgets(b,in,inl);	if (cb != NULL)		i=(int)cb(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl,			0L,(long)i);	return(i);	}int BIO_indent(BIO *b,int indent,int max)	{	if(indent < 0)		indent=0;	if(indent > max)		indent=max;	while(indent--)		if(BIO_puts(b," ") != 1)			return 0;	return 1;	}long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)	{	int i;	i=iarg;	return(BIO_ctrl(b,cmd,larg,(char *)&i));	}char *BIO_ptr_ctrl(BIO *b, int cmd, long larg)	{	char *p=NULL;	if (BIO_ctrl(b,cmd,larg,(char *)&p) <= 0)		return(NULL);	else		return(p);	}long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)	{	long ret;	long (*cb)(BIO *,int,const char *,int,long,long);	if (b == NULL) return(0);	if ((b->method == NULL) || (b->method->ctrl == NULL))		{		BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD);		return(-2);		}	cb=b->callback;	if ((cb != NULL) &&		((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0))		return(ret);	ret=b->method->ctrl(b,cmd,larg,parg);	if (cb != NULL)		ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd,			larg,ret);	return(ret);	}long BIO_callback_ctrl(BIO *b, int cmd, void (*fp)(struct bio_st *, int, const char *, int, long, long))	{	long ret;	long (*cb)(BIO *,int,const char *,int,long,long);	if (b == NULL) return(0);	if ((b->method == NULL) || (b->method->callback_ctrl == NULL))		{		BIOerr(BIO_F_BIO_CALLBACK_CTRL,BIO_R_UNSUPPORTED_METHOD);		return(-2);		}	cb=b->callback;	if ((cb != NULL) &&		((ret=cb(b,BIO_CB_CTRL,(void *)&fp,cmd,0,1L)) <= 0))		return(ret);	ret=b->method->callback_ctrl(b,cmd,fp);	if (cb != NULL)		ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,(void *)&fp,cmd,			0,ret);	return(ret);	}/* It is unfortunate to duplicate in functions what the BIO_(w)pending macros * do; but those macros have inappropriate return type, and for interfacing * from other programming languages, C macros aren't much of a help anyway. */size_t BIO_ctrl_pending(BIO *bio)	{	return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);	}size_t BIO_ctrl_wpending(BIO *bio)	{	return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);	}/* put the 'bio' on the end of b's list of operators */BIO *BIO_push(BIO *b, BIO *bio)	{	BIO *lb;	if (b == NULL) return(bio);	lb=b;	while (lb->next_bio != NULL)		lb=lb->next_bio;	lb->next_bio=bio;	if (bio != NULL)		bio->prev_bio=lb;	/* called to do internal processing */	BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL);	return(b);	}/* Remove the first and return the rest */BIO *BIO_pop(BIO *b)	{	BIO *ret;	if (b == NULL) return(NULL);	ret=b->next_bio;	BIO_ctrl(b,BIO_CTRL_POP,0,NULL);	if (b->prev_bio != NULL)		b->prev_bio->next_bio=b->next_bio;	if (b->next_bio != NULL)		b->next_bio->prev_bio=b->prev_bio;	b->next_bio=NULL;	b->prev_bio=NULL;	return(ret);	}BIO *BIO_get_retry_BIO(BIO *bio, int *reason)	{	BIO *b,*last;	b=last=bio;	for (;;)		{		if (!BIO_should_retry(b)) break;		last=b;		b=b->next_bio;		if (b == NULL) break;		}	if (reason != NULL) *reason=last->retry_reason;	return(last);	}int BIO_get_retry_reason(BIO *bio)	{	return(bio->retry_reason);	}BIO *BIO_find_type(BIO *bio, int type)	{	int mt,mask;	if(!bio) return NULL;	mask=type&0xff;	do	{		if (bio->method != NULL)			{			mt=bio->method->type;			if (!mask)				{				if (mt & type) return(bio);				}			else if (mt == type)				return(bio);			}		bio=bio->next_bio;		} while (bio != NULL);	return(NULL);	}BIO *BIO_next(BIO *b)	{	if(!b) return NULL;	return b->next_bio;	}void BIO_free_all(BIO *bio)	{	BIO *b;	int ref;	while (bio != NULL)		{		b=bio;		ref=b->references;		bio=bio->next_bio;		BIO_free(b);		/* Since ref count > 1, don't free anyone else. */		if (ref > 1) break;		}	}BIO *BIO_dup_chain(BIO *in)	{	BIO *ret=NULL,*eoc=NULL,*bio,*new;	for (bio=in; bio != NULL; bio=bio->next_bio)		{		if ((new=BIO_new(bio->method)) == NULL) goto err;		new->callback=bio->callback;		new->cb_arg=bio->cb_arg;		new->init=bio->init;		new->shutdown=bio->shutdown;		new->flags=bio->flags;		/* This will let SSL_s_sock() work with stdin/stdout */		new->num=bio->num;		if (!BIO_dup_state(bio,(char *)new))			{			BIO_free(new);			goto err;			}		/* copy app data */		if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new->ex_data,					&bio->ex_data))			goto err;		if (ret == NULL)			{			eoc=new;			ret=eoc;			}		else			{			BIO_push(eoc,new);			eoc=new;			}		}	return(ret);err:	if (ret != NULL)		BIO_free(ret);	return(NULL);		}void BIO_copy_next_retry(BIO *b)	{	BIO_set_flags(b,BIO_get_retry_flags(b->next_bio));	b->retry_reason=b->next_bio->retry_reason;	}int BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,	     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)	{	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp,				new_func, dup_func, free_func);	}int BIO_set_ex_data(BIO *bio, int idx, void *data)	{	return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data));	}void *BIO_get_ex_data(BIO *bio, int idx)	{	return(CRYPTO_get_ex_data(&(bio->ex_data),idx));	}unsigned long BIO_number_read(BIO *bio){	if(bio) return bio->num_read;	return 0;}unsigned long BIO_number_written(BIO *bio){	if(bio) return bio->num_write;	return 0;}IMPLEMENT_STACK_OF(BIO)