/* 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 */