1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*
File: swap.c
Copyright (C) 1998-2006,2008 Christophe GRENIER <grenier@cgsecurity.org>
This software is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "common.h"
#include "swap.h"
static void set_Linux_SWAP_info(const union swap_header *swap_header, partition_t *partition);
static int test_Linux_SWAP(const union swap_header *swap_header);
/* Page size can be 4k or 8k */
#define MAX_PAGE_SIZE 8192
int check_Linux_SWAP(disk_t *disk_car, partition_t *partition)
{
unsigned char *buffer=(unsigned char*)MALLOC(MAX_PAGE_SIZE);
if(disk_car->pread(disk_car, buffer, MAX_PAGE_SIZE, partition->part_offset) != MAX_PAGE_SIZE)
{
free(buffer);
return 1;
}
if(test_Linux_SWAP((union swap_header*)buffer)!=0)
{
free(buffer);
return 1;
}
set_Linux_SWAP_info((union swap_header*)buffer,partition);
free(buffer);
return 0;
}
static void set_Linux_SWAP_info(const union swap_header *swap_header,partition_t *partition)
{
partition->fsname[0]='\0';
if(memcmp(swap_header->magic.magic,"SWAP-SPACE",10)==0)
{
partition->upart_type=UP_LINSWAP;
partition->blocksize=4096;
snprintf(partition->info, sizeof(partition->info), "SWAP version %u, pagesize=%u",
le32(swap_header->info.version), partition->blocksize);
}
else if(memcmp(swap_header->magic.magic,"SWAPSPACE2",10)==0)
{
partition->upart_type=UP_LINSWAP2;
partition->blocksize=4096;
snprintf(partition->info, sizeof(partition->info), "SWAP2 version %u, pagesize=%u",
le32(swap_header->info.version), partition->blocksize);
/* set_part_name(partition,swap_header->info.volume_name,16); */
}
else if(memcmp(swap_header->magic8k.magic,"SWAP-SPACE",10)==0)
{
partition->upart_type=UP_LINSWAP_8K;
partition->blocksize=8192;
snprintf(partition->info, sizeof(partition->info), "SWAP version %u, pagesize=%u",
le32(swap_header->info.version), partition->blocksize);
}
else if(memcmp(swap_header->magic8k.magic,"SWAPSPACE2",10)==0)
{
partition->blocksize=8192;
if(le32(swap_header->info.version) <= be32(swap_header->info.version))
{
partition->upart_type=UP_LINSWAP2_8K;
snprintf(partition->info, sizeof(partition->info), "SWAP2 version %u, pagesize=%u",
le32(swap_header->info.version), partition->blocksize);
}
else
{
partition->upart_type=UP_LINSWAP2_8KBE;
snprintf(partition->info, sizeof(partition->info), "SWAP2 version %u, pagesize=%u",
(unsigned int)be32(swap_header->info.version), partition->blocksize);
}
}
}
static int test_Linux_SWAP(const union swap_header *swap_header)
{
if( memcmp(swap_header->magic.magic,"SWAP-SPACE",10)==0 ||
memcmp(swap_header->magic.magic,"SWAPSPACE2",10)==0 ||
memcmp(swap_header->magic8k.magic,"SWAP-SPACE",10)==0 ||
memcmp(swap_header->magic8k.magic,"SWAPSPACE2",10)==0)
return 0;
return 1;
}
int recover_Linux_SWAP(const union swap_header *swap_header, partition_t *partition)
{
if(test_Linux_SWAP(swap_header)!=0)
return 1;
set_Linux_SWAP_info(swap_header,partition);
partition->part_type_i386=P_LINSWAP;
partition->part_type_sun=PSUN_LINSWAP;
partition->part_type_mac=PMAC_SWAP;
partition->part_type_gpt=GPT_ENT_TYPE_LINUX_SWAP;
switch(partition->upart_type)
{
case UP_LINSWAP:
{
int i;
for(i=PAGE_SIZE-10-1;i>=0;i--)
if(swap_header->magic.reserved[i]!=(char)0)
break;
if(i>=0)
{
int j;
for(j=7;j>=0;j--)
if((swap_header->magic.reserved[i]&(1<<j))!=(char)0)
break;
partition->part_size=(uint64_t)(8*i+j+1)*PAGE_SIZE;
}
else
partition->part_size=PAGE_SIZE;
}
break;
case UP_LINSWAP2:
if(swap_header->info.last_page==0)
partition->part_size=PAGE_SIZE;
else
partition->part_size=(uint64_t)(le32(swap_header->info.last_page) - 1)*PAGE_SIZE;
break;
case UP_LINSWAP_8K:
{
int i;
for(i=PAGE_8K - 10 - 1; i>=0; i--)
if(swap_header->magic8k.reserved[i]!=(char)0)
break;
if(i>=0)
{
int j;
for(j=7;j>=0;j--)
if((swap_header->magic8k.reserved[i]&(1<<j))!=(char)0)
break;
partition->part_size=(uint64_t)(8*i+j+1)*PAGE_8K;
}
else
partition->part_size=PAGE_8K;
}
break;
case UP_LINSWAP2_8K:
if(swap_header->info.last_page==0)
partition->part_size=PAGE_8K;
else
partition->part_size=(uint64_t)(le32(swap_header->info.last_page) - 1)*PAGE_8K;
break;
case UP_LINSWAP2_8KBE:
if(swap_header->info.last_page==0)
partition->part_size=PAGE_8K;
else
partition->part_size=(uint64_t)(be32(swap_header->info.last_page) - 1)*PAGE_8K;
break;
default:
return 1;
}
return 0;
}
|
