/* 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

  */

 /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

 #ifndef HEADER_BSS_FILE_C

 #define HEADER_BSS_FILE_C

 #if defined(__linux) || defined(__sun) || defined(__hpux)

 /* Following definition aliases fopen to fopen64 on above mentioned

  * platforms. This makes it possible to open and sequentially access

  * files larger than 2GB from 32-bit application. It does not allow to

  * traverse them beyond 2GB with fseek/ftell, but on the other hand *no*

  * 32-bit platform permits that, not with fseek/ftell. Not to mention

  * that breaking 2GB limit for seeking would require surgery to *our*

  * API. But sequential access suffices for practical cases when you

  * can run into large files, such as fingerprinting, so we can let API

  * alone. For reference, the list of 32-bit platforms which allow for

  * sequential access of large files without extra "magic" comprise *BSD,

  * Darwin, IRIX...

  */

 #ifndef _FILE_OFFSET_BITS

 #define _FILE_OFFSET_BITS 64

 #endif

 #endif

 #include <stdio.h>

 #include <errno.h>

 #include "cryptlib.h"

 #include "bio_lcl.h"

 #include <openssl/err.h>

 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

 #include "libcrypto_wsd_macros.h"

 #include "libcrypto_wsd.h"

 #endif

 #if !defined(OPENSSL_NO_STDIO)

 static int MS_CALLBACK file_write(BIO *h, const char *buf, int num);

 static int MS_CALLBACK file_read(BIO *h, char *buf, int size);

 static int MS_CALLBACK file_puts(BIO *h, const 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, void *arg2);

 static int MS_CALLBACK file_new(BIO *h);

 static int MS_CALLBACK file_free(BIO *data);

 #ifndef EMULATOR

 static BIO_METHOD methods_filep=

 	{

 	BIO_TYPE_FILE,

 	"FILE pointer",

 	file_write,

 	file_read,

 	file_puts,

 	file_gets,

 	file_ctrl,

 	file_new,

 	file_free,

 	NULL,

 	};

 #else

 GET_STATIC_VAR_FROM_TLS(methods_filep,bss_file,BIO_METHOD)

 #define methods_filep (*GET_WSD_VAR_NAME(methods_filep,bss_file,s)())

 const BIO_METHOD temp_s_methods_filep=

 	{

 	BIO_TYPE_FILE,

 	"FILE pointer",

 	file_write,

 	file_read,

 	file_puts,

 	file_gets,

 	file_ctrl,

 	file_new,

 	file_free,

 	NULL,

 	};

 #endif	

 EXPORT_C 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,"')");

 		if (errno == ENOENT)

 			BIOerr(BIO_F_BIO_NEW_FILE,BIO_R_NO_SUCH_FILE);

 		else

 			BIOerr(BIO_F_BIO_NEW_FILE,ERR_R_SYS_LIB);

 		return(NULL);

 		}

 	if ((ret=BIO_new(BIO_s_file_internal())) == NULL)

 	{

 		fclose(file);

   	return(NULL);

 	}	

 	BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */

 	BIO_set_fp(ret,file,BIO_CLOSE);

 	return(ret);

 	}

 EXPORT_C BIO *BIO_new_fp(FILE *stream, int close_flag)

 	{

 	BIO *ret;

 	if ((ret=BIO_new(BIO_s_file())) == NULL)

 		return(NULL);

 	BIO_set_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */

 	BIO_set_fp(ret,stream,close_flag);

 	return(ret);

 	}

 EXPORT_C 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;

 	bi->flags=BIO_FLAGS_UPLINK; /* default to UPLINK */

 	return(1);

 	}

 static int MS_CALLBACK file_free(BIO *a)

 	{

 	if (a == NULL) return(0);

 	if (a->shutdown)

 		{

 		if ((a->init) && (a->ptr != NULL))

 			{

 			if (a->flags&BIO_FLAGS_UPLINK)

 				UP_fclose (a->ptr);

 			else

 				fclose (a->ptr);

 			a->ptr=NULL;

 			a->flags=BIO_FLAGS_UPLINK;

 			}

 		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))

 		{

 		if (b->flags&BIO_FLAGS_UPLINK)

 			ret=UP_fread(out,1,(int)outl,b->ptr);

 		else

 			ret=fread(out,1,(int)outl,(FILE *)b->ptr);

 		if(ret == 0 && (b->flags&BIO_FLAGS_UPLINK)?UP_ferror((FILE *)b->ptr):ferror((FILE *)b->ptr))

 			{

 			SYSerr(SYS_F_FREAD,get_last_sys_error());

 			BIOerr(BIO_F_FILE_READ,ERR_R_SYS_LIB);

 			ret=-1;

 			}

 		}

 	return(ret);

 	}

 static int MS_CALLBACK file_write(BIO *b, const char *in, int inl)

 	{

 	int ret=0;

 	if (b->init && (in != NULL))

 		{

 		if (b->flags&BIO_FLAGS_UPLINK)

 			ret=UP_fwrite(in,(int)inl,1,b->ptr);

 		else

 			ret=fwrite(in,(int)inl,1,(FILE *)b->ptr);

 		if (ret)

 			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, void *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:

 		if (b->flags&BIO_FLAGS_UPLINK)

 			ret=(long)UP_fseek(b->ptr,num,0);

 		else

 			ret=(long)fseek(fp,num,0);

 		break;

 	case BIO_CTRL_EOF:

 		if (b->flags&BIO_FLAGS_UPLINK)

 			ret=(long)UP_feof(fp);

 		else

 			ret=(long)feof(fp);

 		break;

 	case BIO_C_FILE_TELL:

 	case BIO_CTRL_INFO:

 		if (b->flags&BIO_FLAGS_UPLINK)

 			ret=UP_ftell(b->ptr);

 		else

 			ret=ftell(fp);

 		break;

 	case BIO_C_SET_FILE_PTR:

 		file_free(b);

 		b->shutdown=(int)num&BIO_CLOSE;

 		b->ptr=ptr;

 		b->init=1;

 #if BIO_FLAGS_UPLINK!=0

 #if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)

 #define _IOB_ENTRIES 20

 #endif

 #if defined(_IOB_ENTRIES)

 		/* Safety net to catch purely internal BIO_set_fp calls */

 		if ((size_t)ptr >= (size_t)stdin &&

 		    (size_t)ptr <  (size_t)(stdin+_IOB_ENTRIES))

 			BIO_clear_flags(b,BIO_FLAGS_UPLINK);

 #endif

 #endif

 #ifdef UP_fsetmode

 		if (b->flags&BIO_FLAGS_UPLINK)

 			UP_fsetmode(b->ptr,num&BIO_FP_TEXT?'t':'b');

 		else

 #endif

 		{

 #if defined(OPENSSL_SYS_WINDOWS)

 		int fd = fileno((FILE*)ptr);

 		if (num & BIO_FP_TEXT)

 			_setmode(fd,_O_TEXT);

 		else

 			_setmode(fd,_O_BINARY);

 #elif defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_CLIB)

 		int fd = fileno((FILE*)ptr);

          /* Under CLib there are differences in file modes

          */

 		if (num & BIO_FP_TEXT)

 			_setmode(fd,O_TEXT);

 		else

 			_setmode(fd,O_BINARY);

 #elif defined(OPENSSL_SYS_MSDOS)

 		int fd = fileno((FILE*)ptr);

 		/* Set correct text/binary mode */

 		if (num & BIO_FP_TEXT)

 			_setmode(fd,_O_TEXT);

 		/* Dangerous to set stdin/stdout to raw (unless redirected) */

 		else

 			{

 			if (fd == STDIN_FILENO || fd == STDOUT_FILENO)

 				{

 				if (isatty(fd) <= 0)

 					_setmode(fd,_O_BINARY);

 				}

 			else

 				_setmode(fd,_O_BINARY);

 			}

 #elif defined(OPENSSL_SYS_OS2)

 		int fd = fileno((FILE*)ptr);

 		if (num & BIO_FP_TEXT)

 			setmode(fd, O_TEXT);

 		else

 			setmode(fd, 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)

 				BUF_strlcpy(p,"a+",sizeof p);

 			else	BUF_strlcpy(p,"a",sizeof p);

 			}

 		else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))

 			BUF_strlcpy(p,"r+",sizeof p);

 		else if (num & BIO_FP_WRITE)

 			BUF_strlcpy(p,"w",sizeof p);

 		else if (num & BIO_FP_READ)

 			BUF_strlcpy(p,"r",sizeof p);

 		else

 			{

 			BIOerr(BIO_F_FILE_CTRL,BIO_R_BAD_FOPEN_MODE);

 			ret=0;

 			break;

 			}

 #if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_OS2) || defined(OPENSSL_SYS_WIN32_CYGWIN)

 		if (!(num & BIO_FP_TEXT))

 			strcat(p,"b");

 		else

 			strcat(p,"t");

 #endif

 #if defined(OPENSSL_SYS_NETWARE)

 		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=fp;

 		b->init=1;

 		BIO_clear_flags(b,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */

 		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:

 		if (b->flags&BIO_FLAGS_UPLINK)

 			UP_fflush(b->ptr);

 		else

 			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';

 	if (bp->flags&BIO_FLAGS_UPLINK)

 		UP_fgets(buf,size,bp->ptr);

 	else

 		fgets(buf,size,(FILE *)bp->ptr);

 	if (buf[0] != '\0')

 		ret=strlen(buf);

 	return(ret);

 	}

 static int MS_CALLBACK file_puts(BIO *bp, const char *str)

 	{

 	int n,ret;

 	n=strlen(str);

 	ret=file_write(bp,str,n);

 	return(ret);

 	}

 #endif /* OPENSSL_NO_STDIO */

 #endif /* HEADER_BSS_FILE_C */