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
|
int writeUSN(UsnRec* uRec)
{
SYSTEMTIME stUTC, stCurrent, stOld;
FILETIME cur, fOld;
char timeDisplay[30];
//creat 2 timestamps, one 1 year in future and one from 1980
GetSystemTime(&stCurrent);
GetSystemTime(&stOld);
stOld.wYear = 1980;
stCurrent.wYear+=1;
SystemTimeToFileTime(&stCurrent, &cur);
SystemTimeToFileTime(&stOld, &fOld);
if ((CompareFileTime(&cur,&uRec->timestamp) == 1) && (CompareFileTime(&fOld,&uRec->timestamp) == -1))
{
FileTimeToSystemTime(&uRec->timestamp,&stUTC);
sprintf(timeDisplay,"%04d\\%02d\\%02d %02d:%02d:%02d\0",stUTC.wYear,stUTC.wMonth,stUTC.wDay,stUTC.wHour,stUTC.wMinute,stUTC.wSecond);
}
else
{
return 0;
}
fprintf(fileUSN,"\"%s\",\"%s\",\"%s\",\"%llu\"\n", uRec->fileName, uRec->reasonText,timeDisplay,uRec->timestamp);
return 1;
}
void reasonString(UsnRec* uRec)
{
int check = uRec->reason & 0x000000FF;
int check4 = (uRec->reason >> 8) & 0x000000FF;
int check6 = (uRec->reason >> 16) & 0x000000FF;
int check8 = (uRec->reason >> 24) & 0x000000FF;
//all for bytes 7 - 8
if (check8 & 0x80)
{
strncat(uRec->reasonText, "File Closed.\0", 250);
}
//all for bytes 5 - 6
if (check6 & 0x04)
{
strncat(uRec->reasonText, "File Encryption Changed.\0", 250);
}
if (check6 & 0x02)
{
strncat(uRec->reasonText, "File Compression Changed.\0", 250);
}
//all for bytes 3 - 4
if (check4 & 0x80)
{
strncat(uRec->reasonText, "File/folder Attributes Changed.\0", 250);
}
if (check & 0x20)
{
strncat(uRec->reasonText, "File Renamed (New name).\0", 250);
}
if (check & 0x10)
{
strncat(uRec->reasonText, "File Renamed (Old name).\0", 250);
}
if (check & 0x04)
{
strncat(uRec->reasonText, "Extended attributes changed.\0", 250);
}
if (check4 & 0x02)
{
strncat(uRec->reasonText, "File/folder Deleted.\0", 250);
}
if (check4 & 0x01)
{
strncat(uRec->reasonText, "File/folder Created.\0",250);
}
//all for bytes 1 - 2
if (check & 0x20)
{
strncat(uRec->reasonText, "File Extended (Added to).\0", 250);
}
if (check & 0x01)
{
strncat(uRec->reasonText, "File Overwritten.\0", 250);
}
if (check & 0x04)
{
strncat(uRec->reasonText, "File truncated.\0", 250);
}
if (uRec->reasonText[0] == '\0')
{
sprintf(uRec->reasonText, "Unknown action - %l \0", uRec->reason);
}
}
int extractRecord()
{
UsnRec uRec;
unsigned char chrLen[4], chrMin[4], chrFileRef[8], chrParentRef[8],chrUSN[4], chrTimestamp[8],chrReason[4],chrSecurity[4],chrSource[4],temp[200];
unsigned long long filePointer;
filePointer = bufferPointer;
memcpy(chrLen,(char*)&fileBuffer[filePointer], 4);
uRec.recLen = *(DWORD*)&chrLen;
if (uRec.recLen > 512)
{
//record too big.
return 0;
}
filePointer += 4;
uRec.majVer = fileBuffer[filePointer];
filePointer += 4;
memcpy(chrMin,(char*)&fileBuffer[filePointer], 4);
uRec.minVer = *(DWORD*)&chrMin;
filePointer += 4;
memcpy(chrFileRef,(char*)&fileBuffer[filePointer], 8);
uRec.FileRef = *(DWORDLONG*)&chrFileRef;
filePointer += 8;
memcpy(chrParentRef,(char*)&fileBuffer[filePointer], 8);
uRec.ParentFileRef = *(DWORDLONG*)&chrParentRef;
filePointer += 8;
memcpy((char*)chrUSN,(char*)&fileBuffer[filePointer], 4);
uRec.usn = *(USN*)&chrUSN;
filePointer += 4;
memcpy(chrTimestamp,(char*)&fileBuffer[filePointer], 8);
uRec.timestamp = *(FILETIME*)&chrTimestamp;
filePointer += 8;
memcpy(chrReason,(char*)&fileBuffer[filePointer], 4);
uRec.reason = *(DWORD*)&chrReason;
filePointer += 4;
memcpy(chrSource,(char*)&fileBuffer[filePointer], 4);
uRec.sourceinfo = *(DWORD*)&chrSource;
filePointer += 4;
memcpy(chrSecurity,(char*)&fileBuffer[filePointer], 4);
uRec.securityID = *(DWORD*)&chrSecurity;
filePointer += 4;
uRec.FileNameLength = fileBuffer[bufferPointer + 56];
if (uRec.FileNameLength > 300)
{
//filename length too long
return 0;
}
memcpy(temp,&fileBuffer[bufferPointer + 59], uRec.FileNameLength);
for (int i=1; i <= uRec.FileNameLength; i+= 2)
{
uRec.fileName[i/2] = temp[i];
}
uRec.fileName[(uRec.FileNameLength/2)] = '\0';
int lenCheck = 60 + uRec.FileNameLength;
do
{
if (lenCheck % 8 !=0)
{
lenCheck++;
}
} while (lenCheck % 8 !=0);
if (uRec.recLen != lenCheck)
{
//sizes do not match
return 0;
}
uRec.reasonText[0] = '\0';
reasonString(&uRec);
int written = writeUSN(&uRec);
if (written == 1)
{
totalRecFound++;
//updateStatus();
}
//clean up
return 1;
}
int checkForRecords()
{
if (fileBuffer[bufferPointer+1] == 0x00 & fileBuffer[bufferPointer+2] == 0x00 && fileBuffer[bufferPointer+3] == 0x00)
{
if (fileBuffer[bufferPointer + 4] == 0x02)
{
if (fileBuffer[bufferPointer + 58] == 60)
{
int result = extractRecord();
if (result == 1)
{
bufferPointer += 60;
}
}
}
}
return 0;
}
| |
