/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
* Copyright (C) 1994, 1995, 1997 TooLs GmbH.
* All rights reserved.
* Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
*
* 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 above 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 software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*/
/*-
* Written by Paul Popelka (paulp@uts.amdahl.com)
*
* You can do anything you want with this software, just don't say you wrote
* it, and don't remove this notice.
*
* This software is provided "as is".
*
* The author supplies this software to be publicly redistributed on the
* understanding that the author is not responsible for the correct
* functioning of this software in any circumstances and is not liable for
* any damages caused by this software.
*
* October 1992
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/endian.h>
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <fs/msdosfs/bpb.h>
#include "msdos/direntry.h"
#include <fs/msdosfs/msdosfsmount.h>
#include "makefs.h"
#include "msdos.h"
static int char8ucs2str(const uint8_t *in, int n, uint16_t *out, int m);
static void ucs2pad(uint16_t *buf, int len, int size);
static int char8match(uint16_t *w1, uint16_t *w2, int n);
static const u_char unix2dos[256] = {
0, 0, 0, 0, 0, 0, 0, 0, /* 00-07 */
0, 0, 0, 0, 0, 0, 0, 0, /* 08-0f */
0, 0, 0, 0, 0, 0, 0, 0, /* 10-17 */
0, 0, 0, 0, 0, 0, 0, 0, /* 18-1f */
0, '!', 0, '#', '$', '%', '&', '\'', /* 20-27 */
'(', ')', 0, '+', 0, '-', 0, 0, /* 28-2f */
'0', '1', '2', '3', '4', '5', '6', '7', /* 30-37 */
'8', '9', 0, 0, 0, 0, 0, 0, /* 38-3f */
'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', /* 40-47 */
'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', /* 48-4f */
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', /* 50-57 */
'X', 'Y', 'Z', 0, 0, 0, '^', '_', /* 58-5f */
'`', 'A', 'B', 'C', 'D', 'E', 'F', 'G', /* 60-67 */
'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', /* 68-6f */
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', /* 70-77 */
'X', 'Y', 'Z', '{', 0, '}', '~', 0, /* 78-7f */
0, 0, 0, 0, 0, 0, 0, 0, /* 80-87 */
0, 0, 0, 0, 0, 0, 0, 0, /* 88-8f */
0, 0, 0, 0, 0, 0, 0, 0, /* 90-97 */
0, 0, 0, 0, 0, 0, 0, 0, /* 98-9f */
0, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5, /* a0-a7 */
0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee, /* a8-af */
0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa, /* b0-b7 */
0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8, /* b8-bf */
0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* c0-c7 */
0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* c8-cf */
0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e, /* d0-d7 */
0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1, /* d8-df */
0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80, /* e0-e7 */
0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8, /* e8-ef */
0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6, /* f0-f7 */
0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98, /* f8-ff */
};
static const u_char u2l[256] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
' ', '!', '"', '#', '$', '%', '&', '\'', /* 20-27 */
'(', ')', '*', '+', ',', '-', '.', '/', /* 28-2f */
'0', '1', '2', '3', '4', '5', '6', '7', /* 30-37 */
'8', '9', ':', ';', '<', '=', '>', '?', /* 38-3f */
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g', /* 40-47 */
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', /* 48-4f */
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', /* 50-57 */
'x', 'y', 'z', '[', '\\', ']', '^', '_', /* 58-5f */
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', /* 60-67 */
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', /* 68-6f */
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', /* 70-77 */
'x', 'y', 'z', '{', '|', '}', '~', 0x7f, /* 78-7f */
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
};
/*
* Determine the number of slots necessary for Win95 names
*/
int
winSlotCnt(const u_char *un, size_t unlen)
{
const u_char *cp;
/*
* Drop trailing blanks and dots
*/
for (cp = un + unlen; unlen > 0; unlen--)
if (*--cp != ' ' && *cp != '.')
break;
return howmany(unlen, WIN_CHARS);
}
/*
* Compare our filename to the one in the Win95 entry
* Returns the checksum or -1 if no match
*/
int
winChkName(const u_char *un, size_t unlen, struct winentry *wep, int chksum)
{
uint16_t wn[WIN_MAXLEN], *p;
uint16_t buf[WIN_CHARS];
int i, len;
/*
* First compare checksums
*/
if (wep->weCnt & WIN_LAST)
chksum = wep->weChksum;
else if (chksum != wep->weChksum)
chksum = -1;
if (chksum == -1)
return -1;
/*
* Offset of this entry
*/
i = ((wep->weCnt & WIN_CNT) - 1) * WIN_CHARS;
/*
* Translate UNIX name to ucs-2
*/
len = char8ucs2str(un, unlen, wn, WIN_MAXLEN);
ucs2pad(wn, len, WIN_MAXLEN);
if (i >= len + 1)
return -1;
if ((wep->weCnt & WIN_LAST) && (len - i > WIN_CHARS))
return -1;
/*
* Fetch name segment from directory entry
*/
p = &buf[0];
memcpy(p, wep->wePart1, sizeof(wep->wePart1));
p += sizeof(wep->wePart1) / sizeof(*p);
memcpy(p, wep->wePart2, sizeof(wep->wePart2));
p += sizeof(wep->wePart2) / sizeof(*p);
memcpy(p, wep->wePart3, sizeof(wep->wePart3));
/*
* And compare name segment
*/
if (!(char8match(&wn[i], buf, WIN_CHARS)))
return -1;
return chksum;
}
/*
* Compute the checksum of a DOS filename for Win95 use
*/
uint8_t
winChksum(uint8_t *name)
{
int i;
uint8_t s;
for (s = 0, i = 11; --i >= 0; s += *name++)
s = (s << 7) | (s >> 1);
return s;
}
/*
* Create a Win95 long name directory entry
* Note: assumes that the filename is valid,
* i.e. doesn't consist solely of blanks and dots
*/
int
unix2winfn(const u_char *un, size_t unlen, struct winentry *wep, int cnt,
int chksum)
{
uint16_t wn[WIN_MAXLEN], *p;
int i, len;
const u_char *cp;
/*
* Drop trailing blanks and dots
*/
for (cp = un + unlen; unlen > 0; unlen--)
if (*--cp != ' ' && *cp != '.')
break;
/*
* Offset of this entry
*/
i = (cnt - 1) * WIN_CHARS;
/*
* Translate UNIX name to ucs-2
*/
len = char8ucs2str(un, unlen, wn, WIN_MAXLEN);
ucs2pad(wn, len, WIN_MAXLEN);
/*
* Initialize winentry to some useful default
*/
memset(wep, 0xff, sizeof(*wep));
wep->weCnt = cnt;
wep->weAttributes = ATTR_WIN95;
wep->weReserved1 = 0;
wep->weChksum = chksum;
wep->weReserved2 = 0;
/*
* Store name segment into directory entry
*/
p = &wn[i];
memcpy(wep->wePart1, p, sizeof(wep->wePart1));
p += sizeof(wep->wePart1) / sizeof(*p);
memcpy(wep->wePart2, p, sizeof(wep->wePart2));
p += sizeof(wep->wePart2) / sizeof(*p);
memcpy(wep->wePart3, p, sizeof(wep->wePart3));
if (len > i + WIN_CHARS)
return 1;
wep->weCnt |= WIN_LAST;
return 0;
}
/*
* Convert a unix filename to a DOS filename according to Win95 rules.
* If applicable and gen is not 0, it is inserted into the converted
* filename as a generation number.
* Returns
* 0 if name couldn't be converted
* 1 if the converted name is the same as the original
* (no long filename entry necessary for Win95)
* 2 if conversion was successful
* 3 if conversion was successful and generation number was inserted
*/
int
unix2dosfn(const u_char *un, u_char dn[12], size_t unlen, u_int gen)
{
int i, j, l;
int conv = 1;
const u_char *cp, *dp, *dp1;
u_char gentext[6], *wcp;
int shortlen;
/*
* Fill the dos filename string with blanks. These are DOS's pad
* characters.
*/
for (i = 0; i < 11; i++)
dn[i] = ' ';
dn[11] = 0;
/*
* The filenames "." and ".." are handled specially, since they
* don't follow dos filename rules.
*/
if (un[0] == '.' && unlen == 1) {
dn[0] = '.';
return gen <= 1;
}
if (un[0] == '.' && un[1] == '.' && unlen == 2) {
dn[0] = '.';
dn[1] = '.';
return gen <= 1;
}
/*
* Filenames with only blanks and dots are not allowed!
*/
for (cp = un, i = unlen; --i >= 0; cp++)
if (*cp != ' ' && *cp != '.')
break;
if (i < 0)
return 0;
/*
* Now find the extension
* Note: dot as first char doesn't start extension
* and trailing dots and blanks are ignored
*/
dp = dp1 = 0;
for (cp = un + 1, i = unlen - 1; --i >= 0;) {
switch (*cp++) {
case '.':
if (!dp1)
dp1 = cp;
break;
case ' ':
break;
default:
if (dp1)
dp = dp1;
dp1 = 0;
break;
}
}
/*
* Now convert it
*/
if (dp) {
if (dp1)
l = dp1 - dp;
else
l = unlen - (dp - un);
for (i = 0, j = 8; i < l && j < 11; i++, j++) {
if (dp[i] != (dn[j] = unix2dos[dp[i]])
&& conv != 3)
conv = 2;
if (!dn[j]) {
conv = 3;
dn[j--] = ' ';
}
}
if (i < l)
conv = 3;
dp--;
} else {
for (dp = cp; *--dp == ' ' || *dp == '.';);
dp++;
}
shortlen = (dp - un) <= 8;
/*
* Now convert the rest of the name
*/
for (i = j = 0; un < dp && j < 8; i++, j++, un++) {
if ((*un == ' ') && shortlen)
dn[j] = ' ';
else
dn[j] = unix2dos[*un];
if ((*un != dn[j])
&& conv != 3)
conv = 2;
if (!dn[j]) {
conv = 3;
dn[j--] = ' ';
}
}
if (un < dp)
conv = 3;
/*
* If we didn't have any chars in filename,
* generate a default
*/
if (!j)
dn[0] = '_';
/*
* The first character cannot be E5,
* because that means a deleted entry
*/
if (dn[0] == 0xe5)
dn[0] = SLOT_E5;
/*
* If there wasn't any char dropped,
* there is no place for generation numbers
*/
if (conv != 3) {
if (gen > 1)
return 0;
return conv;
}
/*
* Now insert the generation number into the filename part
*/
for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10)
*--wcp = gen % 10 + '0';
if (gen)
return 0;
for (i = 8; dn[--i] == ' ';);
i++;
if (gentext + sizeof(gentext) - wcp + 1 > 8 - i)
i = 8 - (gentext + sizeof(gentext) - wcp + 1);
dn[i++] = '~';
while (wcp < gentext + sizeof(gentext))
dn[i++] = *wcp++;
return 3;
}
/*
* Convert 8bit character string into UCS-2 string
* return total number of output chacters
*/
static int
char8ucs2str(const uint8_t *in, int n, uint16_t *out, int m)
{
uint16_t *p;
p = out;
while (n > 0 && in[0] != 0) {
if (m < 1)
break;
if (p)
p[0] = htole16(in[0]);
p += 1;
m -= 1;
in += 1;
n -= 1;
}
return p - out;
}
static void
ucs2pad(uint16_t *buf, int len, int size)
{
if (len < size-1)
buf[len++] = 0x0000;
while (len < size)
buf[len++] = 0xffff;
}
/*
* Compare two 8bit char conversions case-insensitive
*
* uses the DOS case folding table
*/
static int
char8match(uint16_t *w1, uint16_t *w2, int n)
{
uint16_t u1, u2;
while (n > 0) {
u1 = le16toh(*w1);
u2 = le16toh(*w2);
if (u1 == 0 || u2 == 0)
return u1 == u2;
if (u1 > 255 || u2 > 255)
return 0;
u1 = u2l[u1 & 0xff];
u2 = u2l[u2 & 0xff];
if (u1 != u2)
return 0;
++w1;
++w2;
--n;
}
return 1;
}