chromium/third_party/boringssl/src/crypto/bio/file.c

/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * 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 ([email protected]).
 *
 * 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 ([email protected])"
 *    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 ([email protected])"
 *
 * 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.] */

#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 …
#endif
#endif

#include <openssl/bio.h>

#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>

#include <openssl/err.h>
#include <openssl/mem.h>

#include "../internal.h"

#if defined(OPENSSL_WINDOWS)
#include <fcntl.h>
#include <io.h>
#endif

#define BIO_FP_READ …
#define BIO_FP_WRITE …
#define BIO_FP_APPEND …

#if !defined(OPENSSL_NO_FILESYSTEM)
#define fopen_if_available …
#else
static FILE *fopen_if_available(const char *path, const char *mode) {
  errno = ENOENT;
  return NULL;
}
#endif

BIO *BIO_new_file(const char *filename, const char *mode) { … }

BIO *BIO_new_fp(FILE *stream, int flags) { … }

static int file_free(BIO *bio) { … }

static int file_read(BIO *b, char *out, int outl) { … }

static int file_write(BIO *b, const char *in, int inl) { … }

static long file_ctrl(BIO *b, int cmd, long num, void *ptr) { … }

static int file_gets(BIO *bp, char *buf, int size) { … }

static const BIO_METHOD methods_filep = …;

const BIO_METHOD *BIO_s_file(void) { … }


int BIO_get_fp(BIO *bio, FILE **out_file) { … }

int BIO_set_fp(BIO *bio, FILE *file, int flags) { … }

int BIO_read_filename(BIO *bio, const char *filename) { … }

int BIO_write_filename(BIO *bio, const char *filename) { … }

int BIO_append_filename(BIO *bio, const char *filename) { … }

int BIO_rw_filename(BIO *bio, const char *filename) { … }

long BIO_tell(BIO *bio) { … }

long BIO_seek(BIO *bio, long offset) { … }