A local copy of OpenSSL from GitHub
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/*
* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*-
* 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 "bio_lcl.h"
# include <openssl/err.h>
# if !defined(OPENSSL_NO_STDIO)
static int file_write(BIO *h, const char *buf, int num);
static int file_read(BIO *h, char *buf, int size);
static int file_puts(BIO *h, const char *str);
static int file_gets(BIO *h, char *str, int size);
static long file_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int file_new(BIO *h);
static int 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,
};
static FILE *file_fopen(const char *filename, const char *mode)
{
FILE *file = NULL;
# if defined(_WIN32) && defined(CP_UTF8)
int sz, len_0 = (int)strlen(filename) + 1;
DWORD flags;
/*
* Basically there are three cases to cover: a) filename is
* pure ASCII string; b) actual UTF-8 encoded string and
* c) locale-ized string, i.e. one containing 8-bit
* characters that are meaningful in current system locale.
* If filename is pure ASCII or real UTF-8 encoded string,
* MultiByteToWideChar succeeds and _wfopen works. If
* filename is locale-ized string, chances are that
* MultiByteToWideChar fails reporting
* ERROR_NO_UNICODE_TRANSLATION, in which case we fall
* back to fopen...
*/
if ((sz = MultiByteToWideChar(CP_UTF8, (flags = MB_ERR_INVALID_CHARS),
filename, len_0, NULL, 0)) > 0 ||
(GetLastError() == ERROR_INVALID_FLAGS &&
(sz = MultiByteToWideChar(CP_UTF8, (flags = 0),
filename, len_0, NULL, 0)) > 0)
) {
WCHAR wmode[8];
WCHAR *wfilename = _alloca(sz * sizeof(WCHAR));
if (MultiByteToWideChar(CP_UTF8, flags,
filename, len_0, wfilename, sz) &&
MultiByteToWideChar(CP_UTF8, 0, mode, strlen(mode) + 1,
wmode, OSSL_NELEM(wmode)) &&
(file = _wfopen(wfilename, wmode)) == NULL &&
(errno == ENOENT || errno == EBADF)
) {
/*
* UTF-8 decode succeeded, but no file, filename
* could still have been locale-ized...
*/
file = fopen(filename, mode);
}
} else if (GetLastError() == ERROR_NO_UNICODE_TRANSLATION) {
file = fopen(filename, mode);
}
# elif defined(__DJGPP__)
{
char *newname = NULL;
if (!HAS_LFN_SUPPORT(filename)) {
char *iterator;
char lastchar;
newname = OPENSSL_malloc(strlen(filename) + 1);
if (newname == NULL)
return NULL;
for(iterator = newname, lastchar = '\0';
*filename; filename++, iterator++) {
if (lastchar == '/' && filename[0] == '.'
&& filename[1] != '.' && filename[1] != '/') {
/* Leading dots are not permitted in plain DOS. */
*iterator = '_';
} else {
*iterator = *filename;
}
lastchar = *filename;
}
*iterator = '\0';
filename = newname;
}
file = fopen(filename, mode);
OPENSSL_free(newname);
}
# else
file = fopen(filename, mode);
# endif
return (file);
}
BIO *BIO_new_file(const char *filename, const char *mode)
{
BIO *ret;
FILE *file = file_fopen(filename, mode);
int fp_flags = BIO_CLOSE;
if (strchr(mode, 'b') == NULL)
fp_flags |= BIO_FP_TEXT;
if (file == 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())) == NULL) {
fclose(file);
return (NULL);
}
BIO_clear_flags(ret, BIO_FLAGS_UPLINK); /* we did fopen -> we disengage
* UPLINK */
BIO_set_fp(ret, file, fp_flags);
return (ret);
}
BIO *BIO_new_fp(FILE *stream, int close_flag)
{
BIO *ret;
if ((ret = BIO_new(BIO_s_file())) == NULL)
return (NULL);
/* redundant flag, left for documentation purposes */
BIO_set_flags(ret, BIO_FLAGS_UPLINK);
BIO_set_fp(ret, stream, close_flag);
return (ret);
}
const BIO_METHOD *BIO_s_file(void)
{
return (&methods_filep);
}
static int 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 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 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 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 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
/* Safety net to catch purely internal BIO_set_fp calls */
# if defined(_MSC_VER) && _MSC_VER>=1900
if (ptr == stdin || ptr == stdout || ptr == stderr)
BIO_clear_flags(b, BIO_FLAGS_UPLINK);
# elif defined(_IOB_ENTRIES)
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_fsetmod
if (b->flags & BIO_FLAGS_UPLINK)
UP_fsetmod(b->ptr, (char)((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_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_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)
OPENSSL_strlcpy(p, "a+", sizeof p);
else
OPENSSL_strlcpy(p, "a", sizeof p);
} else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
OPENSSL_strlcpy(p, "r+", sizeof p);
else if (num & BIO_FP_WRITE)
OPENSSL_strlcpy(p, "w", sizeof p);
else if (num & BIO_FP_READ)
OPENSSL_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_WIN32_CYGWIN)
if (!(num & BIO_FP_TEXT))
strcat(p, "b");
else
strcat(p, "t");
# endif
fp = file_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 file_gets(BIO *bp, char *buf, int size)
{
int ret = 0;
buf[0] = '\0';
if (bp->flags & BIO_FLAGS_UPLINK) {
if (!UP_fgets(buf, size, bp->ptr))
goto err;
} else {
if (!fgets(buf, size, (FILE *)bp->ptr))
goto err;
}
if (buf[0] != '\0')
ret = strlen(buf);
err:
return (ret);
}
static int file_puts(BIO *bp, const char *str)
{
int n, ret;
n = strlen(str);
ret = file_write(bp, str, n);
return (ret);
}
#else
static int file_write(BIO *b, const char *in, int inl)
{
return -1;
}
static int file_read(BIO *b, char *out, int outl)
{
return -1;
}
static int file_puts(BIO *bp, const char *str)
{
return -1;
}
static int file_gets(BIO *bp, char *buf, int size)
{
return 0;
}
static long file_ctrl(BIO *b, int cmd, long num, void *ptr)
{
return 0;
}
static int file_new(BIO *bi)
{
return 0;
}
static int file_free(BIO *a)
{
return 0;
}
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,
};
const BIO_METHOD *BIO_s_file(void)
{
return (&methods_filep);
}
BIO *BIO_new_file(const char *filename, const char *mode)
{
return NULL;
}
# endif /* OPENSSL_NO_STDIO */
#endif /* HEADER_BSS_FILE_C */