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openssl/crypto/bio/bss_file.c

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/* 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
#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(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);
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,
};
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)
return(NULL);
BIO_clear_flags(ret,BIO_FLAGS_UPLINK); /* we did fopen -> we disengage UPLINK */
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_flags(ret,BIO_FLAGS_UPLINK); /* redundant, left for documentation puposes */
BIO_set_fp(ret,stream,close_flag);
return(ret);
}
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) || defined(OPENSSL_SYS_WIN32_CYGWIN)
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 */
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