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
|
// ****************************************************************************
// Project: GUYMAGER
// ****************************************************************************
// Programmer: Guy Voncken
// Police Grand-Ducale
// Service de Police Judiciaire
// Section Nouvelles Technologies
// ****************************************************************************
// Module: Thread for calculating hashes
// ****************************************************************************
// Copyright 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
// 2018, 2019, 2020
// Guy Voncken
//
// This file is part of Guymager.
//
// Guymager 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.
//
// Guymager 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 Guymager. If not, see <http://www.gnu.org/licenses/>.
#include <QtCore>
#include "common.h"
#include "device.h"
#include "threadhash.h"
#include "threadwrite.h"
#include "hash.h"
class t_ThreadHashLocal
{
public:
t_pDevice pDevice;
};
t_ThreadHash::t_ThreadHash(void)
{
CHK_EXIT (ERROR_THREADHASH_CONSTRUCTOR_NOT_SUPPORTED)
} //lint !e1401 not initialised
t_ThreadHash::t_ThreadHash (t_pDevice pDevice)
{
static bool Initialised = false;
if (!Initialised)
{
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADHASH_CONSTRUCTOR_NOT_SUPPORTED))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADHASH_LIBEWF_FAILED))
Initialised = true;
}
pOwn = new t_ThreadHashLocal;
pOwn->pDevice = pDevice;
CHK_QT_EXIT (connect (this, SIGNAL(finished()), this, SLOT(SlotFinished())))
}
t_ThreadHash::~t_ThreadHash (void)
{
delete pOwn;
}
void t_ThreadHash::run (void)
{
t_pDevice pDevice;
t_pFifoBlock pFifoBlock;
bool Finished;
quint64 *pBlocks;
quint64 BlocksCalculated = 0;
quint64 BlocksVerified = 0;
quint64 Hashed = 0;
t_HashContextMD5 HashContextMD5;
t_HashContextSHA1 HashContextSHA1;
t_HashContextSHA256 HashContextSHA256;
bool VerifyLoop = false;
LOG_INFO ("[%s] Hash thread started", QSTR_TO_PSZ (pOwn->pDevice->LinuxDevice))
CHK_EXIT (SetDebugMessage ("Start run function"))
pDevice = pOwn->pDevice;
pBlocks = &BlocksCalculated;
for (;;) // The whole loop is done 2 times if the user chose to do a source verification, 1 time otherwise.
{
*pBlocks = 0;
Finished = false;
if (pDevice->Acquisition1.CalcMD5 ) CHK_EXIT (HashMD5Init (&HashContextMD5 ))
if (pDevice->Acquisition1.CalcSHA1 ) CHK_EXIT (HashSHA1Init (&HashContextSHA1 ))
if (pDevice->Acquisition1.CalcSHA256) CHK_EXIT (HashSHA256Init (&HashContextSHA256))
do
{
CHK_EXIT (SetDebugMessage ("Wait for block"))
CHK_EXIT (pDevice->pFifoHashIn->Get (pFifoBlock))
CHK_EXIT (SetDebugMessage ("Process block"))
if (pFifoBlock)
{
(*pBlocks)++;
if (pDevice->Acquisition1.CalcMD5 ) CHK_EXIT (HashMD5Append (&HashContextMD5 , pFifoBlock->Buffer, pFifoBlock->DataSize))
if (pDevice->Acquisition1.CalcSHA1 ) CHK_EXIT (HashSHA1Append (&HashContextSHA1 , pFifoBlock->Buffer, pFifoBlock->DataSize))
if (pDevice->Acquisition1.CalcSHA256) CHK_EXIT (HashSHA256Append (&HashContextSHA256, pFifoBlock->Buffer, pFifoBlock->DataSize))
if (VerifyLoop)
{
pDevice->CurrentVerifyPosSrc.Inc (pFifoBlock->DataSize);
CHK_EXIT (t_Fifo::Destroy (pDevice->pFifoMemory, pFifoBlock))
}
else
{
Hashed += pFifoBlock->DataSize;
if (Hashed >= pDevice->Size) // Make sure to calculate the hash before inserting the last block or else, if the write thread
{ // get a time slice in between, it could possibly put an invalid hash into the image file.
if (pDevice->Acquisition1.CalcMD5 ) CHK_EXIT (HashMD5Digest (&HashContextMD5 , &pDevice->MD5Digest ))
if (pDevice->Acquisition1.CalcSHA1 ) CHK_EXIT (HashSHA1Digest (&HashContextSHA1 , &pDevice->SHA1Digest ))
if (pDevice->Acquisition1.CalcSHA256) CHK_EXIT (HashSHA256Digest (&HashContextSHA256, &pDevice->SHA256Digest))
}
CHK_EXIT (pDevice->pFifoHashOut->Insert (pFifoBlock))
}
}
else
{
LOG_INFO ("[%s] Dummy block", QSTR_TO_PSZ (pOwn->pDevice->LinuxDevice))
Finished = true;
}
} while (!Finished && !pDevice->Error.Abort());
if (pDevice->Error.Abort())
{
break;
}
else if (VerifyLoop)
{
if (pDevice->Acquisition1.CalcMD5 ) CHK_EXIT (HashMD5Digest (&HashContextMD5 , &pDevice->MD5DigestVerifySrc ))
if (pDevice->Acquisition1.CalcSHA1 ) CHK_EXIT (HashSHA1Digest (&HashContextSHA1 , &pDevice->SHA1DigestVerifySrc ))
if (pDevice->Acquisition1.CalcSHA256) CHK_EXIT (HashSHA256Digest (&HashContextSHA256, &pDevice->SHA256DigestVerifySrc))
break;
}
else if (pDevice->Acquisition1.VerifySrc)
{
pBlocks = &BlocksVerified;
VerifyLoop = true;
CHK_EXIT (pDevice->pFifoHashOut->InsertDummy ()) // Make compression threads know they can end
}
else
{
break;
}
}
if (pDevice->Acquisition1.VerifySrc)
LOG_INFO ("[%s] Hash thread exits now - %lld blocks processed, %lld blocks verified", QSTR_TO_PSZ (pOwn->pDevice->LinuxDevice), BlocksCalculated, BlocksVerified)
else LOG_INFO ("[%s] Hash thread exits now - %lld blocks processed" , QSTR_TO_PSZ (pOwn->pDevice->LinuxDevice), BlocksCalculated)
CHK_EXIT (SetDebugMessage ("Exit run function"))
}
void t_ThreadHash::SlotFinished (void)
{
emit SignalEnded (pOwn->pDevice);
}
|
