/* $OpenBSD: bss_file.c,v 1.34 2022/01/07 09:02:17 tb Exp $ */
/* 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 <errno.h>
#include <stdio.h>
#include <string.h>
#include <openssl/bio.h>
#include <openssl/err.h>
#include "bio_local.h"
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 = {
.type = BIO_TYPE_FILE,
.name = "FILE pointer",
.bwrite = file_write,
.bread = file_read,
.bputs = file_puts,
.bgets = file_gets,
.ctrl = file_ctrl,
.create = file_new,
.destroy = file_free
};
BIO *
BIO_new_file(const char *filename, const char *mode)
{
BIO *ret;
FILE *file = NULL;
file = fopen(filename, mode);
if (file == NULL) {
SYSerror(errno);
ERR_asprintf_error_data("fopen('%s', '%s')", filename, mode);
if (errno == ENOENT)
BIOerror(BIO_R_NO_SUCH_FILE);
else
BIOerror(ERR_R_SYS_LIB);
return (NULL);
}
if ((ret = BIO_new(BIO_s_file())) == NULL) {
fclose(file);
return (NULL);
}
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_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=0;
return (1);
}
static int
file_free(BIO *a)
{
if (a == NULL)
return (0);
if (a->shutdown) {
if ((a->init) && (a->ptr != NULL)) {
fclose (a->ptr);
a->ptr = NULL;
a->flags = 0;
}
a->init = 0;
}
return (1);
}
static int
file_read(BIO *b, char *out, int outl)
{
int ret = 0;
if (b->init && out != NULL) {
ret = fread(out, 1, outl, (FILE *)b->ptr);
if (ret == 0 && ferror((FILE *)b->ptr)) {
SYSerror(errno);
BIOerror(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)
ret = fwrite(in, 1, inl, (FILE *)b->ptr);
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:
ret = (long)fseek(fp, num, 0);
break;
case BIO_CTRL_EOF:
ret = (long)feof(fp);
break;
case BIO_C_FILE_TELL:
case BIO_CTRL_INFO:
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;
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)
strlcpy(p, "a+", sizeof p);
else strlcpy(p, "a", sizeof p);
} else if ((num & BIO_FP_READ) && (num & BIO_FP_WRITE))
strlcpy(p, "r+", sizeof p);
else if (num & BIO_FP_WRITE)
strlcpy(p, "w", sizeof p);
else if (num & BIO_FP_READ)
strlcpy(p, "r", sizeof p);
else {
BIOerror(BIO_R_BAD_FOPEN_MODE);
ret = 0;
break;
}
fp = fopen(ptr, p);
if (fp == NULL) {
SYSerror(errno);
ERR_asprintf_error_data("fopen('%s', '%s')", ptr, p);
BIOerror(ERR_R_SYS_LIB);
ret = 0;
break;
}
b->ptr = fp;
b->init = 1;
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:
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 (!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);
}
#endif /* HEADER_BSS_FILE_C */