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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
// Checksum Tool
// Version 1.0
// By Bio (C) 2012
#define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers
#include <io.h>
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include "../../include/m_core.h"
#define DEBUG_MSGS 1
#define DEBUG_ARCH 1
// #define DEBUG_SECTIONS 1
// Return codes
#define RESULT_OK 0
#define RESULT_NOTFOUND 10
#define RESULT_READERROR 20
#define RESULT_NOTPE 30
#define RESULT_CORRUPTED 40
#define RESULT_INVALID 50
#define RESULT_NONE 100
int PEChecksum(TCHAR *filename, mir_md5_byte_t digest[16])
{
HANDLE hFile = INVALID_HANDLE_VALUE;
HANDLE hMap;
PBYTE ptr = 0;
int res = RESULT_OK;
DWORD size;
DWORD hsize = 0;
WORD machine = 0;
DWORD sections = 0;
hFile = CreateFile( filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL );
if ( hFile == INVALID_HANDLE_VALUE ) {
return RESULT_NOTFOUND;
}
// check minimum and maximum size
size = GetFileSize(hFile, &hsize);
if ( !size || size == INVALID_FILE_SIZE || hsize )
{
CloseHandle( hFile );
return RESULT_INVALID;
}
if ( size < sizeof(IMAGE_DOS_HEADER) + sizeof(IMAGE_NT_HEADERS) )
{
CloseHandle( hFile );
return RESULT_NOTPE;
}
hMap = CreateFileMapping( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
if (hMap)
ptr = (PBYTE)MapViewOfFile(hMap, FILE_MAP_READ, 0, 0 ,0);
if (ptr)
{
PIMAGE_DOS_HEADER pIDH = 0;
PIMAGE_NT_HEADERS pINTH = 0;
PIMAGE_SECTION_HEADER pISH = 0;
pIDH = (PIMAGE_DOS_HEADER)ptr;
if ( pIDH->e_magic == IMAGE_DOS_SIGNATURE )
pINTH = (PIMAGE_NT_HEADERS)( ptr + pIDH->e_lfanew );
if ( !pINTH)
res = RESULT_NOTPE;
else
if ( (PBYTE)pINTH + sizeof(IMAGE_NT_HEADERS) >= ptr + size )
res = RESULT_CORRUPTED;
else
if ( pINTH->Signature != IMAGE_NT_SIGNATURE )
res = RESULT_NOTPE;
else
{
machine = pINTH->FileHeader.Machine;
#if defined(DEBUG_ARCH) && defined(DEBUG_MSGS)
switch(machine)
{
case IMAGE_FILE_MACHINE_I386:
fprintf( stdout, "(x86) ");
break;
case IMAGE_FILE_MACHINE_AMD64:
fprintf( stdout, "(x64) ");
break;
case IMAGE_FILE_MACHINE_IA64:
fprintf( stdout, "(IA64 :-) ");
break;
default:
fprintf( stdout, "(unknown) ");
break;
}
#endif
sections = pINTH->FileHeader.NumberOfSections;
if ( !sections )
res = RESULT_INVALID;
else
{
DWORD idx = 0;
mir_md5_state_t pms;
mir_md5_init( &pms );
#if defined(DEBUG_SECTIONS) && defined(DEBUG_MSGS)
fprintf( stdout, "\n" );
#endif
// try to found correct offset independent of architectures
DWORD offset = pIDH->e_lfanew + pINTH->FileHeader.SizeOfOptionalHeader + sizeof(IMAGE_NT_HEADERS) - sizeof(IMAGE_OPTIONAL_HEADER);
while ( idx < sections )
{
pISH = (PIMAGE_SECTION_HEADER)( ptr + offset + idx * sizeof(IMAGE_SECTION_HEADER) );
if ( (PBYTE)pISH + sizeof(IMAGE_SECTION_HEADER) > ptr + size )
{
res = RESULT_CORRUPTED;
break;
}
if ( pISH->PointerToRawData + pISH->SizeOfRawData > size )
{
res = RESULT_CORRUPTED;
break;
}
#if defined(DEBUG_SECTIONS) && defined(DEBUG_MSGS)
fprintf( stdout, "%s - %d - %d \n", pISH->Name, pISH->PointerToRawData, pISH->SizeOfRawData);
#endif
mir_md5_append( &pms, ptr + pISH->PointerToRawData, pISH->SizeOfRawData );
idx++;
}
if ( res == RESULT_OK )
mir_md5_finish( &pms, digest );
}
}
}
else
res = RESULT_READERROR;
if ( ptr )
UnmapViewOfFile( ptr );
if ( hMap )
CloseHandle( hMap );
CloseHandle( hFile );
return res;
}
int main( int argc, char** argv )
{
mir_md5_byte_t digest[16] = {0};
int res = 0;
if ( argc > 1 )
{
for ( int i=1; i < argc; i++ )
{
#ifdef DEBUG_MSGS
fprintf( stdout, "Processing '%s'... ", argv[ i ] );
#endif
res = PEChecksum( argv[ i ], digest);
switch(res)
{
#ifdef DEBUG_MSGS
case RESULT_NOTFOUND:
{
fprintf( stdout, "not found!\n");
break;
}
case RESULT_READERROR:
{
fprintf( stdout, "read error!\n");
break;
}
case RESULT_NOTPE:
{
fprintf( stdout, "not PE type!\n");
break;
}
case RESULT_CORRUPTED:
{
fprintf( stdout, "corrupted\n");
break;
}
#endif
case RESULT_OK:
{
int i;
for ( i = 0; i < sizeof(digest) / sizeof(digest[0]); i++ )
fprintf( stdout, "%02X", digest[i] );
} // no break
default:
{
fprintf( stdout, "\n");
break;
}
}
}
}
else
{
fprintf( stderr, "PE CHECKSUM TOOL v1.0\n\n" );
fprintf( stderr, "Usage: checksum.exe [filename] ... [filename]\n");
fprintf( stderr, "Output: MD5 checksum of all sections in PE file.\n");
return RESULT_NONE;
}
return res;
}
|
