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

Source
/*
 * Copyright 1995-2026 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;
    int fp_flags = BIO_CLOSE;

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

    if (filename == NULL) {
        ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
        return NULL;
    }

    file = openssl_fopen(filename, mode);
    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 != 0 && out != NULL && outl > 0) {
        if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
            ret = (int)UP_fread(out, 1, outl, b->ptr);
        else
            ret = (int)fread(out, 1, 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)
{
    size_t ret = 0;

    if (inl < INT_MAX && inl >= 0 && b->init && (in != NULL)) {
        if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
            ret = (int)UP_fwrite(in, 1, (size_t)inl, b->ptr);
        else
            ret = fwrite(in, 1, (size_t)inl, (FILE *)b->ptr);
    }

    return (int)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;
#if defined(OPENSSL_SYS_WINDOWS)
    int oldErr;
#endif

    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:
        /*
         * NOTE feof returns 0 if we're not in an eof condition
         * and a non-zero value if we are (i.e. any non-zero value
         * so we map the 0:non-0 return value here to 0:1 with a
         * double negation
         */
#if defined(OPENSSL_SYS_WINDOWS)
        oldErr = errno;
        errno = 0;
#endif
        if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
            ret = !!(long)UP_feof(fp);
        else
            ret = !!(long)feof(fp);
#if defined(OPENSSL_SYS_WINDOWS)
        /*
         * Windows gives us an extra issue to contend with.
         * In windows feof may return 0 if it is passed an invalid
         * stream.  In this event, feof sets errno to EINVAL.
         * Check for that here, and set ret to -EINVAL if its the case.
         */
        if (ret == 0 && errno == EINVAL)
            ret = -EINVAL;
        else if (errno == 0)
            errno = oldErr;
#endif
        break;
    case BIO_C_FILE_TELL:
    case BIO_CTRL_INFO:
        if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
            ret = UP_ftell(b->ptr);
        else {
#if defined(OPENSSL_SYS_WINDOWS)
            /*
             * On Windows, for non-seekable files (stdin), ftell() is undefined.
             */
            if (GetFileType((HANDLE)_get_osfhandle(_fileno(fp))) != FILE_TYPE_DISK)
                ret = -1;
            else
                ret = ftell(fp);
#else
            ret = ftell(fp);
#endif
        }
        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);
#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
        if (ptr == NULL) {
            ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
            ret = 0;
            break;
        }
        fp = openssl_fopen(ptr, p);
        if (fp == NULL) {
            ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
                "calling fopen(%s, %s)",
                (const char *)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;
            if (BIO_FLAGS_UPLINK_INTERNAL == 0
                || b->flags & BIO_FLAGS_UPLINK_INTERNAL) {
                *fpp = (FILE *)b->ptr;
            } else { /* avoid returning internal FILE * to the app */
                *fpp = NULL;
                ret = 0;
            }
        }
        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 = (int)strlen(buf);
err:
    return ret;
}

static int file_puts(BIO *bp, const char *str)
{
    int ret;
    size_t n = strlen(str);

    if (n > INT_MAX)
        return -1;
    ret = file_write(bp, str, (int)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: 2026-08-23 06:38

Line	Count	Source
1		/*
2		* Copyright 1995-2026 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	16	{
59	16	BIO *ret;
60	16	FILE *file;
61	16	int fp_flags = BIO_CLOSE;
62
63	16	if (strchr(mode, 'b') == NULL)
64	0	fp_flags \|= BIO_FP_TEXT;
65
66	16	if (filename == NULL) {
67	0	ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
68	0	return NULL;
69	0	}
70
71	16	file = openssl_fopen(filename, mode);
72	16	if (file == NULL) {
73	16	ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
74	16	"calling fopen(%s, %s)",
75	16	filename, mode);
76	16	if (errno == ENOENT
77	0	#ifdef ENXIO
78	16	\|\| errno == ENXIO
79	16	#endif
80	16	)
81	16	ERR_raise(ERR_LIB_BIO, BIO_R_NO_SUCH_FILE);
82	0	else
83	16	ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
84	16	return NULL;
85	16	}
86	0	if ((ret = BIO_new(BIO_s_file())) == NULL) {
87	0	fclose(file);
88	0	return NULL;
89	0	}
90
91		/* we did fopen -> we disengage UPLINK */
92	0	BIO_clear_flags(ret, BIO_FLAGS_UPLINK_INTERNAL);
93	0	BIO_set_fp(ret, file, fp_flags);
94	0	return ret;
95	0	}
96
97		BIO BIO_new_fp(FILE stream, int close_flag)
98	0	{
99	0	BIO *ret;
100
101	0	if ((ret = BIO_new(BIO_s_file())) == NULL)
102	0	return NULL;
103
104		/* redundant flag, left for documentation purposes */
105	0	BIO_set_flags(ret, BIO_FLAGS_UPLINK_INTERNAL);
106	0	BIO_set_fp(ret, stream, close_flag);
107	0	return ret;
108	0	}
109
110		const BIO_METHOD *BIO_s_file(void)
111	0	{
112	0	return &methods_filep;
113	0	}
114
115		static int file_new(BIO *bi)
116	0	{
117	0	bi->init = 0;
118	0	bi->num = 0;
119	0	bi->ptr = NULL;
120	0	bi->flags = BIO_FLAGS_UPLINK_INTERNAL; /* default to UPLINK */
121	0	return 1;
122	0	}
123
124		static int file_free(BIO *a)
125	0	{
126	0	if (a == NULL)
127	0	return 0;
128	0	if (a->shutdown) {
129	0	if ((a->init) && (a->ptr != NULL)) {
130	0	if (a->flags & BIO_FLAGS_UPLINK_INTERNAL)
131	0	UP_fclose(a->ptr);
132	0	else
133	0	fclose(a->ptr);
134	0	a->ptr = NULL;
135	0	a->flags = BIO_FLAGS_UPLINK_INTERNAL;
136	0	}
137	0	a->init = 0;
138	0	}
139	0	return 1;
140	0	}
141
142		static int file_read(BIO b, char out, int outl)
143	0	{
144	0	int ret = 0;
145
146	0	if (b->init != 0 && out != NULL && outl > 0) {
147	0	if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
148	0	ret = (int)UP_fread(out, 1, outl, b->ptr);
149	0	else
150	0	ret = (int)fread(out, 1, outl, (FILE *)b->ptr);
151	0	if (ret == 0
152	0	&& (b->flags & BIO_FLAGS_UPLINK_INTERNAL
153	0	? UP_ferror((FILE *)b->ptr)
154	0	: ferror((FILE *)b->ptr))) {
155	0	ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
156	0	"calling fread()");
157	0	ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
158	0	ret = -1;
159	0	}
160	0	}
161	0	return ret;
162	0	}
163
164		static int file_write(BIO b, const char in, int inl)
165	0	{
166	0	size_t ret = 0;
167
168	0	if (inl < INT_MAX && inl >= 0 && b->init && (in != NULL)) {
169	0	if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
170	0	ret = (int)UP_fwrite(in, 1, (size_t)inl, b->ptr);
171	0	else
172	0	ret = fwrite(in, 1, (size_t)inl, (FILE *)b->ptr);
173	0	}
174
175	0	return (int)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		#if defined(OPENSSL_SYS_WINDOWS)
186		int oldErr;
187		#endif
188
189	0	switch (cmd) {
190	0	case BIO_C_FILE_SEEK:
191	0	case BIO_CTRL_RESET:
192	0	if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
193	0	ret = (long)UP_fseek(b->ptr, num, 0);
194	0	else
195	0	ret = (long)fseek(fp, num, 0);
196	0	break;
197	0	case BIO_CTRL_EOF:
198		/*
199		* NOTE feof returns 0 if we're not in an eof condition
200		* and a non-zero value if we are (i.e. any non-zero value
201		* so we map the 0:non-0 return value here to 0:1 with a
202		* double negation
203		*/
204		#if defined(OPENSSL_SYS_WINDOWS)
205		oldErr = errno;
206		errno = 0;
207		#endif
208	0	if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
209	0	ret = !!(long)UP_feof(fp);
210	0	else
211	0	ret = !!(long)feof(fp);
212		#if defined(OPENSSL_SYS_WINDOWS)
213		/*
214		* Windows gives us an extra issue to contend with.
215		* In windows feof may return 0 if it is passed an invalid
216		* stream. In this event, feof sets errno to EINVAL.
217		* Check for that here, and set ret to -EINVAL if its the case.
218		*/
219		if (ret == 0 && errno == EINVAL)
220		ret = -EINVAL;
221		else if (errno == 0)
222		errno = oldErr;
223		#endif
224	0	break;
225	0	case BIO_C_FILE_TELL:
226	0	case BIO_CTRL_INFO:
227	0	if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
228	0	ret = UP_ftell(b->ptr);
229	0	else {
230		#if defined(OPENSSL_SYS_WINDOWS)
231		/*
232		* On Windows, for non-seekable files (stdin), ftell() is undefined.
233		*/
234		if (GetFileType((HANDLE)_get_osfhandle(_fileno(fp))) != FILE_TYPE_DISK)
235		ret = -1;
236		else
237		ret = ftell(fp);
238		#else
239	0	ret = ftell(fp);
240	0	#endif
241	0	}
242	0	break;
243	0	case BIO_C_SET_FILE_PTR:
244	0	file_free(b);
245	0	b->shutdown = (int)num & BIO_CLOSE;
246	0	b->ptr = ptr;
247	0	b->init = 1;
248		#if BIO_FLAGS_UPLINK_INTERNAL != 0
249		#if defined(__MINGW32__) && defined(__MSVCRT__) && !defined(_IOB_ENTRIES)
250		#define _IOB_ENTRIES 20
251		#endif
252		/* Safety net to catch purely internal BIO_set_fp calls */
253		#if (defined(_MSC_VER) && _MSC_VER >= 1900) \|\| defined(__BORLANDC__)
254		if (ptr == stdin \|\| ptr == stdout \|\| ptr == stderr)
255		BIO_clear_flags(b, BIO_FLAGS_UPLINK_INTERNAL);
256		#elif defined(_IOB_ENTRIES)
257		if ((size_t)ptr >= (size_t)stdin && (size_t)ptr < (size_t)(stdin + _IOB_ENTRIES))
258		BIO_clear_flags(b, BIO_FLAGS_UPLINK_INTERNAL);
259		#endif
260		#endif
261		#ifdef UP_fsetmod
262		if (b->flags & BIO_FLAGS_UPLINK_INTERNAL)
263		UP_fsetmod(b->ptr, (char)((num & BIO_FP_TEXT) ? 't' : 'b'));
264		else
265		#endif
266	0	{
267		#if defined(OPENSSL_SYS_WINDOWS)
268		int fd = _fileno((FILE *)ptr);
269		if (num & BIO_FP_TEXT)
270		_setmode(fd, _O_TEXT);
271		else
272		_setmode(fd, _O_BINARY);
273		#elif defined(OPENSSL_SYS_MSDOS)
274		int fd = fileno((FILE *)ptr);
275		/* Set correct text/binary mode */
276		if (num & BIO_FP_TEXT)
277		_setmode(fd, _O_TEXT);
278		/* Dangerous to set stdin/stdout to raw (unless redirected) */
279		else {
280		if (fd == STDIN_FILENO \|\| fd == STDOUT_FILENO) {
281		if (isatty(fd) <= 0)
282		_setmode(fd, _O_BINARY);
283		} else
284		_setmode(fd, _O_BINARY);
285		}
286		#elif defined(OPENSSL_SYS_WIN32_CYGWIN)
287		int fd = fileno((FILE *)ptr);
288		if (!(num & BIO_FP_TEXT))
289		setmode(fd, O_BINARY);
290		#endif
291	0	}
292	0	break;
293	0	case BIO_C_SET_FILENAME:
294	0	file_free(b);
295	0	b->shutdown = (int)num & BIO_CLOSE;
296	0	if (num & BIO_FP_APPEND) {
297	0	if (num & BIO_FP_READ)
298	0	OPENSSL_strlcpy(p, "a+", sizeof(p));
299	0	else
300	0	OPENSSL_strlcpy(p, "a", sizeof(p));
301	0	} else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
302	0	OPENSSL_strlcpy(p, "r+", sizeof(p));
303	0	else if (num & BIO_FP_WRITE)
304	0	OPENSSL_strlcpy(p, "w", sizeof(p));
305	0	else if (num & BIO_FP_READ)
306	0	OPENSSL_strlcpy(p, "r", sizeof(p));
307	0	else {
308	0	ERR_raise(ERR_LIB_BIO, BIO_R_BAD_FOPEN_MODE);
309	0	ret = 0;
310	0	break;
311	0	}
312		#if defined(OPENSSL_SYS_MSDOS) \|\| defined(OPENSSL_SYS_WINDOWS)
313		if (!(num & BIO_FP_TEXT))
314		OPENSSL_strlcat(p, "b", sizeof(p));
315		else
316		OPENSSL_strlcat(p, "t", sizeof(p));
317		#elif defined(OPENSSL_SYS_WIN32_CYGWIN)
318		if (!(num & BIO_FP_TEXT))
319		OPENSSL_strlcat(p, "b", sizeof(p));
320		#endif
321	0	if (ptr == NULL) {
322	0	ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
323	0	ret = 0;
324	0	break;
325	0	}
326	0	fp = openssl_fopen(ptr, p);
327	0	if (fp == NULL) {
328	0	ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
329	0	"calling fopen(%s, %s)",
330	0	(const char *)ptr, p);
331	0	ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
332	0	ret = 0;
333	0	break;
334	0	}
335	0	b->ptr = fp;
336	0	b->init = 1;
337		/* we did fopen -> we disengage UPLINK */
338	0	BIO_clear_flags(b, BIO_FLAGS_UPLINK_INTERNAL);
339	0	break;
340	0	case BIO_C_GET_FILE_PTR:
341		/* the ptr parameter is actually a FILE ** in this case. */
342	0	if (ptr != NULL) {
343	0	fpp = (FILE **)ptr;
344	0	if (BIO_FLAGS_UPLINK_INTERNAL == 0
345	0	\|\| b->flags & BIO_FLAGS_UPLINK_INTERNAL) {
346	0	fpp = (FILE )b->ptr;
347	0	} else { /* avoid returning internal FILE * to the app */
348	0	*fpp = NULL;
349	0	ret = 0;
350	0	}
351	0	}
352	0	break;
353	0	case BIO_CTRL_GET_CLOSE:
354	0	ret = (long)b->shutdown;
355	0	break;
356	0	case BIO_CTRL_SET_CLOSE:
357	0	b->shutdown = (int)num;
358	0	break;
359	0	case BIO_CTRL_FLUSH:
360	0	st = b->flags & BIO_FLAGS_UPLINK_INTERNAL
361	0	? UP_fflush(b->ptr)
362	0	: fflush((FILE *)b->ptr);
363	0	if (st == EOF) {
364	0	ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
365	0	"calling fflush()");
366	0	ERR_raise(ERR_LIB_BIO, ERR_R_SYS_LIB);
367	0	ret = 0;
368	0	}
369	0	break;
370	0	case BIO_CTRL_DUP:
371	0	ret = 1;
372	0	break;
373
374	0	case BIO_CTRL_WPENDING:
375	0	case BIO_CTRL_PENDING:
376	0	case BIO_CTRL_PUSH:
377	0	case BIO_CTRL_POP:
378	0	default:
379	0	ret = 0;
380	0	break;
381	0	}
382	0	return ret;
383	0	}
384
385		static int file_gets(BIO bp, char buf, int size)
386	0	{
387	0	int ret = 0;
388
389	0	buf[0] = '\0';
390	0	if (bp->flags & BIO_FLAGS_UPLINK_INTERNAL) {
391	0	if (!UP_fgets(buf, size, bp->ptr))
392	0	goto err;
393	0	} else {
394	0	if (!fgets(buf, size, (FILE *)bp->ptr))
395	0	goto err;
396	0	}
397	0	if (buf[0] != '\0')
398	0	ret = (int)strlen(buf);
399	0	err:
400	0	return ret;
401	0	}
402
403		static int file_puts(BIO bp, const char str)
404	0	{
405	0	int ret;
406	0	size_t n = strlen(str);
407
408	0	if (n > INT_MAX)
409	0	return -1;
410	0	ret = file_write(bp, str, (int)n);
411	0	return ret;
412	0	}
413
414		#else
415
416		static int file_write(BIO b, const char in, int inl)
417		{
418		return -1;
419		}
420		static int file_read(BIO b, char out, int outl)
421		{
422		return -1;
423		}
424		static int file_puts(BIO bp, const char str)
425		{
426		return -1;
427		}
428		static int file_gets(BIO bp, char buf, int size)
429		{
430		return 0;
431		}
432		static long file_ctrl(BIO b, int cmd, long num, void ptr)
433		{
434		return 0;
435		}
436		static int file_new(BIO *bi)
437		{
438		return 0;
439		}
440		static int file_free(BIO *a)
441		{
442		return 0;
443		}
444
445		static const BIO_METHOD methods_filep = {
446		BIO_TYPE_FILE,
447		"FILE pointer",
448		bwrite_conv,
449		file_write,
450		bread_conv,
451		file_read,
452		file_puts,
453		file_gets,
454		file_ctrl,
455		file_new,
456		file_free,
457		NULL, /* file_callback_ctrl */
458		};
459
460		const BIO_METHOD *BIO_s_file(void)
461		{
462		return &methods_filep;
463		}
464
465		BIO BIO_new_file(const char filename, const char *mode)
466		{
467		return NULL;
468		}
469
470		#endif /* OPENSSL_NO_STDIO */