1 /*-
2 * Copyright (c) 2005 Takanori Watanabe
3 * Copyright (c) 2014 The FreeBSD Foundation
4 * All rights reserved.
5 *
6 * This software was developed by Edward Tomasz Napierala under sponsorship
7 * from the FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD: stable/12/usr.sbin/fstyp/ntfs.c 369204 2021-02-02 21:15:35Z emaste $");
33
34 #ifdef WITH_ICONV
35 #endif
36 #include <stdint.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40
41 #include "fstyp.h"
42
43 #define NTFS_A_VOLUMENAME 0x60
44 #define NTFS_FILEMAGIC ((uint32_t)(0x454C4946))
45 #define NTFS_VOLUMEINO 3
46
47 struct ntfs_attr {
48 uint32_t a_type;
49 uint32_t reclen;
50 uint8_t a_flag;
51 uint8_t a_namelen;
52 uint8_t a_nameoff;
53 uint8_t reserved1;
54 uint8_t a_compression;
55 uint8_t reserved2;
56 uint16_t a_index;
57 uint16_t a_datalen;
58 uint16_t reserved3;
59 uint16_t a_dataoff;
60 uint16_t a_indexed;
61 } __packed;
62
63 struct ntfs_filerec {
64 uint32_t fr_hdrmagic;
65 uint16_t fr_hdrfoff;
66 uint16_t fr_hdrfnum;
67 uint8_t reserved[8];
68 uint16_t fr_seqnum;
69 uint16_t fr_nlink;
70 uint16_t fr_attroff;
71 uint16_t fr_flags;
72 uint32_t fr_size;
73 uint32_t fr_allocated;
74 uint64_t fr_mainrec;
75 uint16_t fr_attrnum;
76 } __packed;
77
78 struct ntfs_bootfile {
79 uint8_t reserved1[3];
80 uint8_t bf_sysid[8];
81 uint16_t bf_bps;
82 uint8_t bf_spc;
83 uint8_t reserved2[7];
84 uint8_t bf_media;
85 uint8_t reserved3[2];
86 uint16_t bf_spt;
87 uint16_t bf_heads;
88 uint8_t reserver4[12];
89 uint64_t bf_spv;
90 uint64_t bf_mftcn;
91 uint64_t bf_mftmirrcn;
92 int8_t bf_mftrecsz;
93 uint32_t bf_ibsz;
94 uint32_t bf_volsn;
95 } __packed;
96
97 #ifdef WITH_ICONV
98 #endif
99 int
fstyp_ntfs(FILE * fp,char * label,size_t size)100 fstyp_ntfs(FILE *fp, char *label, size_t size)
101 {
102 struct ntfs_bootfile *bf;
103 struct ntfs_filerec *fr;
104 struct ntfs_attr *atr;
105 off_t voloff;
106 char *filerecp, *ap;
107 int8_t mftrecsz;
108 char vnchar;
109 int recsize, j;
110
111 filerecp = NULL;
112
113 bf = (struct ntfs_bootfile *)read_buf(fp, 0, 512);
114 if (bf == NULL || strncmp(bf->bf_sysid, "NTFS ", 8) != 0)
115 goto fail;
116 #ifdef WITH_ICONV
117
118 mftrecsz = bf->bf_mftrecsz;
119 recsize = (mftrecsz > 0) ? (mftrecsz * bf->bf_bps * bf->bf_spc) : (1 << -mftrecsz);
120
121 voloff = bf->bf_mftcn * bf->bf_spc * bf->bf_bps +
122 recsize * NTFS_VOLUMEINO;
123
124 filerecp = read_buf(fp, voloff, recsize);
125 if (filerecp == NULL)
126 goto fail;
127 fr = (struct ntfs_filerec *)filerecp;
128
129 if (fr->fr_hdrmagic != NTFS_FILEMAGIC)
130 goto fail;
131
132 for (ap = filerecp + fr->fr_attroff;
133 atr = (struct ntfs_attr *)ap, (int)atr->a_type != -1;
134 ap += atr->reclen) {
135 if (atr->a_type == NTFS_A_VOLUMENAME) {
136 if(atr->a_datalen >= size *2){
137 goto fail;
138 }
139 /*
140 *UNICODE to ASCII.
141 * Should we need to use iconv(9)?
142 */
143 for (j = 0; j < atr->a_datalen; j++) {
144 vnchar = *(ap + atr->a_dataoff + j);
145 if (j & 1) {
146 if (vnchar) {
147 goto fail;
148 }
149 } else {
150 label[j / 2] = vnchar;
151 }
152 }
153 label[j / 2] = 0;
154 break;
155 }
156 }
157
158 #endif /* WITH_ICONV */
159 free(bf);
160 free(filerecp);
161
162 return (0);
163
164 fail:
165 free(bf);
166 free(filerecp);
167
168 return (1);
169 }
170