/src/openssl/crypto/bio/bss_file.c

Source (jump to first uncovered line)
/*
 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (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
 */

#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 one 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_local.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",
    bwrite_conv,
    file_write,
    bread_conv,
    file_read,
    file_puts,
    file_gets,
    file_ctrl,
    file_new,
    file_free,
    NULL,                      /* file_callback_ctrl */
};

BIO *BIO_new_file(const char *filename, const char *mode)
{
    BIO  *ret;
    FILE *file = openssl_fopen(filename, mode);
    int fp_flags = BIO_CLOSE;

    if (strchr(mode, 'b') == NULL)
        fp_flags |= BIO_FP_TEXT;

    if (file == NULL) {
        ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
                       "calling fopen(%s, %s)",
                       filename, mode);
        if (errno == ENOENT
#ifdef ENXIO
            || errno == ENXIO
#endif
            )
            ERR_raise(ERR_LIB_BIO, BIO_R_NO_SUCH_FILE);
        else
            ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
        return NULL;
    }
    if ((ret = BIO_new(BIO_s_file())) == NULL) {
        fclose(file);
        return NULL;
    }

    /* we did fopen -> we disengage UPLINK */
    BIO_clear_flags(ret, BIO_FLAGS_UPLINK_INTERNAL);
    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_INTERNAL);
    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_INTERNAL; /* 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_INTERNAL)
                UP_fclose(a->ptr);
            else
                fclose(a->ptr);
            a->ptr = NULL;
            a->flags = BIO_FLAGS_UPLINK_INTERNAL;
        }
        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_INTERNAL)
            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_INTERNAL
                ? UP_ferror((FILE *)b->ptr) : ferror((FILE *)b->ptr))) {
            ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
                           "calling fread()");
            ERR_raise(ERR_LIB_BIO, 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_INTERNAL)
            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@openssl.org>, 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];
    int st;

    switch (cmd) {
    case BIO_C_FILE_SEEK:
    case BIO_CTRL_RESET:
        if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
            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_INTERNAL)
            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_INTERNAL)
            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_INTERNAL!=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) || defined(__BORLANDC__)
        if (ptr == stdin || ptr == stdout || ptr == stderr)
            BIO_clear_flags(b, BIO_FLAGS_UPLINK_INTERNAL);
#  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_INTERNAL);
#  endif
# endif
# ifdef UP_fsetmod
        if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
            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);
            /*
             * Reports show that ftell() isn't trustable in text mode.
             * This has been confirmed as a bug in the Universal C RTL, see
             * https://developercommunity.visualstudio.com/content/problem/425878/fseek-ftell-fail-in-text-mode-for-unix-style-text.html
             * The suggested work-around from Microsoft engineering is to
             * turn off buffering until the bug is resolved.
             */
            if ((num & BIO_FP_TEXT) != 0)
                setvbuf((FILE *)ptr, NULL, _IONBF, 0);
# 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_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 {
            ERR_raise(ERR_LIB_BIO, BIO_R_BAD_FOPEN_MODE);
            ret = 0;
            break;
        }
# if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WINDOWS)
        if (!(num & BIO_FP_TEXT))
            OPENSSL_strlcat(p, "b", sizeof(p));
        else
            OPENSSL_strlcat(p, "t", sizeof(p));
# elif defined(OPENSSL_SYS_WIN32_CYGWIN)
        if (!(num & BIO_FP_TEXT))
            OPENSSL_strlcat(p, "b", sizeof(p));
# endif
        fp = openssl_fopen(ptr, p);
        if (fp == NULL) {
            ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
                           "calling fopen(%s, %s)",
                           ptr, p);
            ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
            ret = 0;
            break;
        }
        b->ptr = fp;
        b->init = 1;
        /* we did fopen -> we disengage UPLINK */
        BIO_clear_flags(b, BIO_FLAGS_UPLINK_INTERNAL);
        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:
        st = b->flags & BIO_FLAGS_UPLINK_INTERNAL
                ? UP_fflush(b->ptr) : fflush((FILE *)b->ptr);
        if (st == EOF) {
            ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
                           "calling fflush()");
            ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
            ret = 0;
        }
        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_INTERNAL) {
        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",
    bwrite_conv,
    file_write,
    bread_conv,
    file_read,
    file_puts,
    file_gets,
    file_ctrl,
    file_new,
    file_free,
    NULL,                      /* file_callback_ctrl */
};

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 */

Coverage Report

Created: 2023-06-07 07:24

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		#if defined(__linux) \|\| defined(__sun) \|\| defined(__hpux)
11		/*
12		* Following definition aliases fopen to fopen64 on above mentioned
13		* platforms. This makes it possible to open and sequentially access files
14		* larger than 2GB from 32-bit application. It does not allow one to traverse
15		* them beyond 2GB with fseek/ftell, but on the other hand no 32-bit
16		* platform permits that, not with fseek/ftell. Not to mention that breaking
17		* 2GB limit for seeking would require surgery to our API. But sequential
18		* access suffices for practical cases when you can run into large files,
19		* such as fingerprinting, so we can let API alone. For reference, the list
20		* of 32-bit platforms which allow for sequential access of large files
21		* without extra "magic" comprise *BSD, Darwin, IRIX...
22		*/
23		# ifndef _FILE_OFFSET_BITS
24		# define _FILE_OFFSET_BITS 64
25		# endif
26		#endif
27
28		#include <stdio.h>
29		#include <errno.h>
30		#include "bio_local.h"
31		#include <openssl/err.h>
32
33		#if !defined(OPENSSL_NO_STDIO)
34
35		static int file_write(BIO h, const char buf, int num);
36		static int file_read(BIO h, char buf, int size);
37		static int file_puts(BIO h, const char str);
38		static int file_gets(BIO h, char str, int size);
39		static long file_ctrl(BIO h, int cmd, long arg1, void arg2);
40		static int file_new(BIO *h);
41		static int file_free(BIO *data);
42		static const BIO_METHOD methods_filep = {
43		BIO_TYPE_FILE,
44		"FILE pointer",
45		bwrite_conv,
46		file_write,
47		bread_conv,
48		file_read,
49		file_puts,
50		file_gets,
51		file_ctrl,
52		file_new,
53		file_free,
54		NULL, /* file_callback_ctrl */
55		};
56
57		BIO BIO_new_file(const char filename, const char *mode)
58	1	{
59	1	BIO *ret;
60	1	FILE *file = openssl_fopen(filename, mode);
61	1	int fp_flags = BIO_CLOSE;
62
63	1	if (strchr(mode, 'b') == NULL)
64	0	fp_flags \|= BIO_FP_TEXT;
65
66	1	if (file == NULL) {
67	1	ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
68	1	"calling fopen(%s, %s)",
69	1	filename, mode);
70	1	if (errno == ENOENT
71	1	#ifdef ENXIO
72	1	\|\| errno == ENXIO
73	1	#endif
74	1	)
75	1	ERR_raise(ERR_LIB_BIO, BIO_R_NO_SUCH_FILE);
76	0	else
77	1	ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
78	1	return NULL;
79	1	}
80	0	if ((ret = BIO_new(BIO_s_file())) == NULL) {
81	0	fclose(file);
82	0	return NULL;
83	0	}
84
85		/* we did fopen -> we disengage UPLINK */
86	0	BIO_clear_flags(ret, BIO_FLAGS_UPLINK_INTERNAL);
87	0	BIO_set_fp(ret, file, fp_flags);
88	0	return ret;
89	0	}
90
91		BIO BIO_new_fp(FILE stream, int close_flag)
92	0	{
93	0	BIO *ret;
94
95	0	if ((ret = BIO_new(BIO_s_file())) == NULL)
96	0	return NULL;
97
98		/* redundant flag, left for documentation purposes */
99	0	BIO_set_flags(ret, BIO_FLAGS_UPLINK_INTERNAL);
100	0	BIO_set_fp(ret, stream, close_flag);
101	0	return ret;
102	0	}
103
104		const BIO_METHOD *BIO_s_file(void)
105	0	{
106	0	return &methods_filep;
107	0	}
108
109		static int file_new(BIO *bi)
110	0	{
111	0	bi->init = 0;
112	0	bi->num = 0;
113	0	bi->ptr = NULL;
114	0	bi->flags = BIO_FLAGS_UPLINK_INTERNAL; /* default to UPLINK */
115	0	return 1;
116	0	}
117
118		static int file_free(BIO *a)
119	0	{
120	0	if (a == NULL)
121	0	return 0;
122	0	if (a->shutdown) {
123	0	if ((a->init) && (a->ptr != NULL)) {
124	0	if (a->flags & BIO_FLAGS_UPLINK_INTERNAL)
125	0	UP_fclose(a->ptr);
126	0	else
127	0	fclose(a->ptr);
128	0	a->ptr = NULL;
129	0	a->flags = BIO_FLAGS_UPLINK_INTERNAL;
130	0	}
131	0	a->init = 0;
132	0	}
133	0	return 1;
134	0	}
135
136		static int file_read(BIO b, char out, int outl)
137	0	{
138	0	int ret = 0;
139
140	0	if (b->init && (out != NULL)) {
141	0	if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
142	0	ret = UP_fread(out, 1, (int)outl, b->ptr);
143	0	else
144	0	ret = fread(out, 1, (int)outl, (FILE *)b->ptr);
145	0	if (ret == 0
146	0	&& (b->flags & BIO_FLAGS_UPLINK_INTERNAL
147	0	? UP_ferror((FILE )b->ptr) : ferror((FILE )b->ptr))) {
148	0	ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
149	0	"calling fread()");
150	0	ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
151	0	ret = -1;
152	0	}
153	0	}
154	0	return ret;
155	0	}
156
157		static int file_write(BIO b, const char in, int inl)
158	0	{
159	0	int ret = 0;
160
161	0	if (b->init && (in != NULL)) {
162	0	if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
163	0	ret = UP_fwrite(in, (int)inl, 1, b->ptr);
164	0	else
165	0	ret = fwrite(in, (int)inl, 1, (FILE *)b->ptr);
166	0	if (ret)
167	0	ret = inl;
168		/* ret=fwrite(in,1,(int)inl,(FILE )b->ptr); /
169		/*
170		* according to Tim Hudson <tjh@openssl.org>, the commented out
171		* version above can cause 'inl' write calls under some stupid stdio
172		* implementations (VMS)
173		*/
174	0	}
175	0	return ret;
176	0	}
177
178		static long file_ctrl(BIO b, int cmd, long num, void ptr)
179	0	{
180	0	long ret = 1;
181	0	FILE fp = (FILE )b->ptr;
182	0	FILE **fpp;
183	0	char p[4];
184	0	int st;
185
186	0	switch (cmd) {
187	0	case BIO_C_FILE_SEEK:
188	0	case BIO_CTRL_RESET:
189	0	if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
190	0	ret = (long)UP_fseek(b->ptr, num, 0);
191	0	else
192	0	ret = (long)fseek(fp, num, 0);
193	0	break;
194	0	case BIO_CTRL_EOF:
195	0	if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
196	0	ret = (long)UP_feof(fp);
197	0	else
198	0	ret = (long)feof(fp);
199	0	break;
200	0	case BIO_C_FILE_TELL:
201	0	case BIO_CTRL_INFO:
202	0	if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
203	0	ret = UP_ftell(b->ptr);
204	0	else
205	0	ret = ftell(fp);
206	0	break;
207	0	case BIO_C_SET_FILE_PTR:
208	0	file_free(b);
209	0	b->shutdown = (int)num & BIO_CLOSE;
210	0	b->ptr = ptr;
211	0	b->init = 1;
212		# if BIO_FLAGS_UPLINK_INTERNAL!=0
213		# if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
214		# define _IOB_ENTRIES 20
215		# endif
216		/* Safety net to catch purely internal BIO_set_fp calls */
217		# if (defined(_MSC_VER) && _MSC_VER>=1900) \|\| defined(__BORLANDC__)
218		if (ptr == stdin \|\| ptr == stdout \|\| ptr == stderr)
219		BIO_clear_flags(b, BIO_FLAGS_UPLINK_INTERNAL);
220		# elif defined(_IOB_ENTRIES)
221		if ((size_t)ptr >= (size_t)stdin &&
222		(size_t)ptr < (size_t)(stdin + _IOB_ENTRIES))
223		BIO_clear_flags(b, BIO_FLAGS_UPLINK_INTERNAL);
224		# endif
225		# endif
226		# ifdef UP_fsetmod
227		if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
228		UP_fsetmod(b->ptr, (char)((num & BIO_FP_TEXT) ? 't' : 'b'));
229		else
230		# endif
231	0	{
232		# if defined(OPENSSL_SYS_WINDOWS)
233		int fd = _fileno((FILE *)ptr);
234		if (num & BIO_FP_TEXT)
235		_setmode(fd, _O_TEXT);
236		else
237		_setmode(fd, _O_BINARY);
238		/*
239		* Reports show that ftell() isn't trustable in text mode.
240		* This has been confirmed as a bug in the Universal C RTL, see
241		* https://developercommunity.visualstudio.com/content/problem/425878/fseek-ftell-fail-in-text-mode-for-unix-style-text.html
242		* The suggested work-around from Microsoft engineering is to
243		* turn off buffering until the bug is resolved.
244		*/
245		if ((num & BIO_FP_TEXT) != 0)
246		setvbuf((FILE *)ptr, NULL, _IONBF, 0);
247		# elif defined(OPENSSL_SYS_MSDOS)
248		int fd = fileno((FILE *)ptr);
249		/* Set correct text/binary mode */
250		if (num & BIO_FP_TEXT)
251		_setmode(fd, _O_TEXT);
252		/* Dangerous to set stdin/stdout to raw (unless redirected) */
253		else {
254		if (fd == STDIN_FILENO \|\| fd == STDOUT_FILENO) {
255		if (isatty(fd) <= 0)
256		_setmode(fd, _O_BINARY);
257		} else
258		_setmode(fd, _O_BINARY);
259		}
260		# elif defined(OPENSSL_SYS_WIN32_CYGWIN)
261		int fd = fileno((FILE *)ptr);
262		if (!(num & BIO_FP_TEXT))
263		setmode(fd, O_BINARY);
264		# endif
265	0	}
266	0	break;
267	0	case BIO_C_SET_FILENAME:
268	0	file_free(b);
269	0	b->shutdown = (int)num & BIO_CLOSE;
270	0	if (num & BIO_FP_APPEND) {
271	0	if (num & BIO_FP_READ)
272	0	OPENSSL_strlcpy(p, "a+", sizeof(p));
273	0	else
274	0	OPENSSL_strlcpy(p, "a", sizeof(p));
275	0	} else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
276	0	OPENSSL_strlcpy(p, "r+", sizeof(p));
277	0	else if (num & BIO_FP_WRITE)
278	0	OPENSSL_strlcpy(p, "w", sizeof(p));
279	0	else if (num & BIO_FP_READ)
280	0	OPENSSL_strlcpy(p, "r", sizeof(p));
281	0	else {
282	0	ERR_raise(ERR_LIB_BIO, BIO_R_BAD_FOPEN_MODE);
283	0	ret = 0;
284	0	break;
285	0	}
286		# if defined(OPENSSL_SYS_MSDOS) \|\| defined(OPENSSL_SYS_WINDOWS)
287		if (!(num & BIO_FP_TEXT))
288		OPENSSL_strlcat(p, "b", sizeof(p));
289		else
290		OPENSSL_strlcat(p, "t", sizeof(p));
291		# elif defined(OPENSSL_SYS_WIN32_CYGWIN)
292		if (!(num & BIO_FP_TEXT))
293		OPENSSL_strlcat(p, "b", sizeof(p));
294		# endif
295	0	fp = openssl_fopen(ptr, p);
296	0	if (fp == NULL) {
297	0	ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
298	0	"calling fopen(%s, %s)",
299	0	ptr, p);
300	0	ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
301	0	ret = 0;
302	0	break;
303	0	}
304	0	b->ptr = fp;
305	0	b->init = 1;
306		/* we did fopen -> we disengage UPLINK */
307	0	BIO_clear_flags(b, BIO_FLAGS_UPLINK_INTERNAL);
308	0	break;
309	0	case BIO_C_GET_FILE_PTR:
310		/* the ptr parameter is actually a FILE ** in this case. */
311	0	if (ptr != NULL) {
312	0	fpp = (FILE **)ptr;
313	0	fpp = (FILE )b->ptr;
314	0	}
315	0	break;
316	0	case BIO_CTRL_GET_CLOSE:
317	0	ret = (long)b->shutdown;
318	0	break;
319	0	case BIO_CTRL_SET_CLOSE:
320	0	b->shutdown = (int)num;
321	0	break;
322	0	case BIO_CTRL_FLUSH:
323	0	st = b->flags & BIO_FLAGS_UPLINK_INTERNAL
324	0	? UP_fflush(b->ptr) : fflush((FILE *)b->ptr);
325	0	if (st == EOF) {
326	0	ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
327	0	"calling fflush()");
328	0	ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
329	0	ret = 0;
330	0	}
331	0	break;
332	0	case BIO_CTRL_DUP:
333	0	ret = 1;
334	0	break;
335
336	0	case BIO_CTRL_WPENDING:
337	0	case BIO_CTRL_PENDING:
338	0	case BIO_CTRL_PUSH:
339	0	case BIO_CTRL_POP:
340	0	default:
341	0	ret = 0;
342	0	break;
343	0	}
344	0	return ret;
345	0	}
346
347		static int file_gets(BIO bp, char buf, int size)
348	0	{
349	0	int ret = 0;
350
351	0	buf[0] = '\0';
352	0	if (bp->flags & BIO_FLAGS_UPLINK_INTERNAL) {
353	0	if (!UP_fgets(buf, size, bp->ptr))
354	0	goto err;
355	0	} else {
356	0	if (!fgets(buf, size, (FILE *)bp->ptr))
357	0	goto err;
358	0	}
359	0	if (buf[0] != '\0')
360	0	ret = strlen(buf);
361	0	err:
362	0	return ret;
363	0	}
364
365		static int file_puts(BIO bp, const char str)
366	0	{
367	0	int n, ret;
368
369	0	n = strlen(str);
370	0	ret = file_write(bp, str, n);
371	0	return ret;
372	0	}
373
374		#else
375
376		static int file_write(BIO b, const char in, int inl)
377		{
378		return -1;
379		}
380		static int file_read(BIO b, char out, int outl)
381		{
382		return -1;
383		}
384		static int file_puts(BIO bp, const char str)
385		{
386		return -1;
387		}
388		static int file_gets(BIO bp, char buf, int size)
389		{
390		return 0;
391		}
392		static long file_ctrl(BIO b, int cmd, long num, void ptr)
393		{
394		return 0;
395		}
396		static int file_new(BIO *bi)
397		{
398		return 0;
399		}
400		static int file_free(BIO *a)
401		{
402		return 0;
403		}
404
405		static const BIO_METHOD methods_filep = {
406		BIO_TYPE_FILE,
407		"FILE pointer",
408		bwrite_conv,
409		file_write,
410		bread_conv,
411		file_read,
412		file_puts,
413		file_gets,
414		file_ctrl,
415		file_new,
416		file_free,
417		NULL, /* file_callback_ctrl */
418		};
419
420		const BIO_METHOD *BIO_s_file(void)
421		{
422		return &methods_filep;
423		}
424
425		BIO BIO_new_file(const char filename, const char *mode)
426		{
427		return NULL;
428		}
429
430		#endif /* OPENSSL_NO_STDIO */