text: /*
   * Copyright (c) 2000-2001,2011-2012,2014 Apple Inc. All Rights Reserved.
   * 
   * The contents of this file constitute Original Code as defined in and are
   * subject to the Apple Public Source License Version 1.2 (the 'License').
   * You may not use this file except in compliance with the License. Please obtain
   * a copy of the License at http://www.apple.com/publicsource and read it before
   * using this file.
   * 
   * This Original Code and all software distributed under the License are
   * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
   * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
   * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
   * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
   * specific language governing rights and limitations under the License.
   */
  
  
  /* crypto/bio/bss_file.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.]
   */
  
  /*
   * 03-Dec-1997	rdenny@dc3.com  Fix bug preventing use of stdin/stdout
   *		with binary data (e.g. asn1parse -inform DER < xxx) under
   *		Windows
   */
  
  #ifndef HEADER_BSS_FILE_C
  #define HEADER_BSS_FILE_C
  
  #include <stdio.h>
  #include <errno.h>
  #include "cryptlib.h"
  #include <openssl/bio.h>
  #include <openssl/err.h>
  
  #if !defined(NO_STDIO)
  
  static int MS_CALLBACK file_write(BIO *h,char *buf,int num);
  static int MS_CALLBACK file_read(BIO *h,char *buf,int size);
  static int MS_CALLBACK file_puts(BIO *h,char *str);
  static int MS_CALLBACK file_gets(BIO *h,char *str,int size);
  static long MS_CALLBACK file_ctrl(BIO *h,int cmd,long arg1,char *arg2);
  static int MS_CALLBACK file_new(BIO *h);
  static int MS_CALLBACK file_free(BIO *data);
  static const BIO_METHOD methods_filep=
  	{
  	BIO_TYPE_FILE,
  	"FILE pointer",
  	file_write,
  	file_read,
  	file_puts,
  	file_gets,
  	file_ctrl,
  	file_new,
  	file_free,
  	NULL,
  	};
  
  BIO *BIO_new_file(const char *filename, const char *mode)
  	{
  	BIO *ret;
  	FILE *file;
  
  	if ((file=fopen(filename,mode)) == NULL)
  		{
  		SYSerr(SYS_F_FOPEN,get_last_sys_error());
  		ERR_add_error_data(5,"fopen('",filename,"','",mode,"')");
  		BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);
  		return(NULL);
  		}
  	if ((ret=BIO_new(BIO_s_file_internal())) == NULL)
  		return(NULL);
  
  	BIO_set_fp(ret,file,BIO_CLOSE);
  	return(ret);
  	}
  
  BIO *BIO_new_fp(FILE *stream, int close_flag)
  	{
  	BIO *ret;
  
  	if ((ret=BIO_new(BIO_s_file())) == NULL)
  		return(NULL);
  
  	BIO_set_fp(ret,stream,close_flag);
  	return(ret);
  	}
  
  const BIO_METHOD *BIO_s_file(void)
  	{
  	return(&methods_filep);
  	}
  
  static int MS_CALLBACK file_new(BIO *bi)
  	{
  	bi->init=0;
  	bi->num=0;
  	bi->ptr=NULL;
  	return(1);
  	}
  
  static int MS_CALLBACK file_free(BIO *a)
  	{
  	if (a == NULL) return(0);
  	if (a->shutdown)
  		{
  		if ((a->init) && (a->ptr != NULL))
  			{
  			fclose((FILE *)a->ptr);
  			a->ptr=NULL;
  			}
  		a->init=0;
  		}
  	return(1);
  	}
  	
  static int MS_CALLBACK file_read(BIO *b, char *out, int outl)
  	{
  	int ret=0;
  
  	if (b->init && (out != NULL))
  		{
  		ret=(int)fread(out,1,outl,(FILE *)b->ptr);
  		}
  	return(ret);
  	}
  
  static int MS_CALLBACK file_write(BIO *b, char *in, int inl)
  	{
  	int ret=0;
  
  	if (b->init && (in != NULL))
  		{
  		if (fwrite(in,(int)inl,1,(FILE *)b->ptr))
  			ret=inl;
  		/* ret=fwrite(in,1,(int)inl,(FILE *)b->ptr); */
  		/* according to Tim Hudson <tjh@cryptsoft.com>, the commented
  		 * out version above can cause 'inl' write calls under
  		 * some stupid stdio implementations (VMS) */
  		}
  	return(ret);
  	}
  
  static long MS_CALLBACK file_ctrl(BIO *b, int cmd, long num, char *ptr)
  	{
  	long ret=1;
  	FILE *fp=(FILE *)b->ptr;
  	FILE **fpp;
  	char p[4];
  
  	switch (cmd)
  		{
  	case BIO_C_FILE_SEEK:
  	case BIO_CTRL_RESET:
  		ret=(long)fseek(fp,num,0);
  		break;
  	case BIO_CTRL_EOF:
  		ret=(long)feof(fp);
  		break;
  	case BIO_C_FILE_TELL:
  	case BIO_CTRL_INFO:
  		ret=ftell(fp);
  		break;
  	case BIO_C_SET_FILE_PTR:
  		file_free(b);
  		b->shutdown=(int)num&BIO_CLOSE;
  		b->ptr=(char *)ptr;
  		b->init=1;
  #if defined(MSDOS) || defined(WINDOWS)
  		/* Set correct text/binary mode */
  		if (num & BIO_FP_TEXT)
  			_setmode(fileno((FILE *)ptr),_O_TEXT);
  		else
  			_setmode(fileno((FILE *)ptr),_O_BINARY);
  #endif
  		break;
  	case BIO_C_SET_FILENAME:
  		file_free(b);
  		b->shutdown=(int)num&BIO_CLOSE;
  		if (num & BIO_FP_APPEND)
  			{
  			if (num & BIO_FP_READ)
  				strcpy(p,"a+");
  			else	strcpy(p,"a");
  			}
  		else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
  			strcpy(p,"r+");
  		else if (num & BIO_FP_WRITE)
  			strcpy(p,"w");
  		else if (num & BIO_FP_READ)
  			strcpy(p,"r");
  		else
  			{
  			BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);
  			ret=0;
  			break;
  			}
  #if defined(MSDOS) || defined(WINDOWS)
  		if (!(num & BIO_FP_TEXT))
  			strcat(p,"b");
  		else
  			strcat(p,"t");
  #endif
  		fp=fopen(ptr,p);
  		if (fp == NULL)
  			{
  			SYSerr(SYS_F_FOPEN,get_last_sys_error());
  			ERR_add_error_data(5,"fopen('",ptr,"','",p,"')");
  			BIOerr(BIO_F_FILE_CTRL,ERR_R_SYS_LIB);
  			ret=0;
  			break;
  			}
  		b->ptr=(char *)fp;
  		b->init=1;
  		break;
  	case BIO_C_GET_FILE_PTR:
  		/* the ptr parameter is actually a FILE ** in this case. */
  		if (ptr != NULL)
  			{
  			fpp=(FILE **)ptr;
  			*fpp=(FILE *)b->ptr;
  			}
  		break;
  	case BIO_CTRL_GET_CLOSE:
  		ret=(long)b->shutdown;
  		break;
  	case BIO_CTRL_SET_CLOSE:
  		b->shutdown=(int)num;
  		break;
  	case BIO_CTRL_FLUSH:
  		fflush((FILE *)b->ptr);
  		break;
  	case BIO_CTRL_DUP:
  		ret=1;
  		break;
  
  	case BIO_CTRL_WPENDING:
  	case BIO_CTRL_PENDING:
  	case BIO_CTRL_PUSH:
  	case BIO_CTRL_POP:
  	default:
  		ret=0;
  		break;
  		}
  	return(ret);
  	}
  
  static int MS_CALLBACK file_gets(BIO *bp, char *buf, int size)
  	{
  	int ret=0;
  
  	buf[0]='\0';
  	fgets(buf,size,(FILE *)bp->ptr);
  	if (buf[0] != '\0')
  		ret=(int)strlen(buf);
  	return(ret);
  	}
  
  static int MS_CALLBACK file_puts(BIO *bp, char *str)
  	{
  	int n,ret;
  
  	n=(int)strlen(str);
  	ret=file_write(bp,str,n);
  	return(ret);
  	}
  
  #endif /* NO_STDIO */
  
  #endif /* HEADER_BSS_FILE_C */
  
  
  