/* 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_SYS_NETWARE) && defined(NETWARE_CLIB)

#  include <nwfileio.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);

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,

};

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, sizeof(wmode) / sizeof(wmode[0])) &&

            (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);

    }

#  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);

    if (file == NULL) {

        SYSerr(SYS_F_FOPEN, get_last_sys_error());

        ERR_add_error_data(5, "fopen('", filename, "','", mode, "')");

        if (errno == ENOENT

# ifdef ENXIO

            || errno == ENXIO

# endif

            )

            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, 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];

    int st;

    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_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 = 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:

        st = b->flags & BIO_FLAGS_UPLINK

                ? UP_fflush(b->ptr) : fflush((FILE *)b->ptr);

        if (st == EOF) {

            SYSerr(SYS_F_FFLUSH, get_last_sys_error());

            ERR_add_error_data(1, "fflush()");

            BIOerr(BIO_F_FILE_CTRL, 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 MS_CALLBACK 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 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 */