VeraCrypt
aboutsummaryrefslogtreecommitdiff
path: root/src/Format/FormatCom.cpp
blob: 8ba2372f4a72d24ef1c85e09e919be230669e49f (plain)
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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
/*
 Derived from source code of TrueCrypt 7.1a, which is
 Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
 by the TrueCrypt License 3.0.

 Modifications and additions to the original source code (contained in this file) 
 and all other portions of this file are Copyright (c) 2013-2016 IDRIX
 and are governed by the Apache License 2.0 the full text of which is
 contained in the file License.txt included in VeraCrypt binary and source
 code distribution packages.
*/

#include <atlcomcli.h>
#include <atlconv.h>
#include <comutil.h>
#include <windows.h>
#include "BaseCom.h"
#include "BootEncryption.h"
#include "Dlgcode.h"
#include "Format.h"
#include "Progress.h"
#include "TcFormat.h"
#include "FormatCom.h"
#include "FormatCom_h.h"
#include "FormatCom_i.c"

using namespace VeraCrypt;

static volatile LONG ObjectCount = 0;

class TrueCryptFormatCom : public ITrueCryptFormatCom
{

public:
	TrueCryptFormatCom (DWORD messageThreadId) : RefCount (0),
		MessageThreadId (messageThreadId),
		CallBack (NULL)
	{
		InterlockedIncrement (&ObjectCount);
	}

	virtual ~TrueCryptFormatCom ()
	{
		if (InterlockedDecrement (&ObjectCount) == 0)
			PostThreadMessage (MessageThreadId, WM_APP, 0, 0);
	}

	virtual ULONG STDMETHODCALLTYPE AddRef ()
	{
		return InterlockedIncrement (&RefCount);
	}

	virtual ULONG STDMETHODCALLTYPE Release ()
	{
		if (!InterlockedDecrement (&RefCount))
		{
			delete this;
			return 0;
		}

		return RefCount;
	}

	virtual HRESULT STDMETHODCALLTYPE QueryInterface (REFIID riid, void **ppvObject)
	{
		if (riid == IID_IUnknown || riid == IID_ITrueCryptFormatCom)
			*ppvObject = this;
		else
		{
			*ppvObject = NULL;
			return E_NOINTERFACE;
		}

		AddRef ();
		return S_OK;
	}
	
	virtual DWORD STDMETHODCALLTYPE CallDriver (DWORD ioctl, BSTR input, BSTR *output)
	{
		return BaseCom::CallDriver (ioctl, input, output);
	}

	virtual DWORD STDMETHODCALLTYPE CopyFile (BSTR sourceFile, BSTR destinationFile)
	{
		return BaseCom::CopyFile (sourceFile, destinationFile);
	}

	virtual DWORD STDMETHODCALLTYPE DeleteFile (BSTR file)
	{
		return BaseCom::DeleteFile (file);
	}

	virtual BOOL STDMETHODCALLTYPE FormatNtfs (int driveNo, int clusterSize)
	{
		return ::FormatNtfs (driveNo, clusterSize);
	}

	virtual int STDMETHODCALLTYPE AnalyzeHiddenVolumeHost (
		LONG_PTR hwndDlg, int *driveNo, __int64 hiddenVolHostSize, int *realClusterSize, __int64 *nbrFreeClusters)
	{
		return ::AnalyzeHiddenVolumeHost (
			(HWND) hwndDlg, driveNo, hiddenVolHostSize, realClusterSize, nbrFreeClusters);
	}

	virtual DWORD STDMETHODCALLTYPE ReadWriteFile (BOOL write, BOOL device, BSTR filePath, BSTR *bufferBstr, unsigned __int64 offset, unsigned __int32 size, DWORD *sizeDone)
	{
		return BaseCom::ReadWriteFile (write, device, filePath, bufferBstr, offset, size, sizeDone);
	}

	virtual DWORD STDMETHODCALLTYPE RegisterFilterDriver (BOOL registerDriver, int filterType)
	{
		return BaseCom::RegisterFilterDriver (registerDriver, filterType);
	}

	virtual DWORD STDMETHODCALLTYPE RegisterSystemFavoritesService (BOOL registerService)
	{
		return BaseCom::RegisterSystemFavoritesService (registerService);
	}

	virtual DWORD STDMETHODCALLTYPE SetDriverServiceStartType (DWORD startType)
	{
		return BaseCom::SetDriverServiceStartType (startType);
	}

	virtual BOOL STDMETHODCALLTYPE IsPagingFileActive (BOOL checkNonWindowsPartitionsOnly)
	{
		return BaseCom::IsPagingFileActive (checkNonWindowsPartitionsOnly);
	}

	virtual DWORD STDMETHODCALLTYPE WriteLocalMachineRegistryDwordValue (BSTR keyPath, BSTR valueName, DWORD value)
	{
		return BaseCom::WriteLocalMachineRegistryDwordValue (keyPath, valueName, value);
	}

	virtual BOOL STDMETHODCALLTYPE FormatFs (int driveNo, int clusterSize, int fsType)
	{
		return ::FormatFs (driveNo, clusterSize, fsType);
	}

protected:
	DWORD MessageThreadId;
	LONG RefCount;
	ITrueCryptFormatCom *CallBack;
};


extern "C" BOOL ComServerFormat ()
{
	SetProcessShutdownParameters (0x100, 0);

	TrueCryptFactory<TrueCryptFormatCom> factory (GetCurrentThreadId ());
	DWORD cookie;

	if (IsUacSupported ())
		UacElevated = TRUE;

	if (CoRegisterClassObject (CLSID_TrueCryptFormatCom, (LPUNKNOWN) &factory,
		CLSCTX_LOCAL_SERVER, REGCLS_SINGLEUSE, &cookie) != S_OK)
		return FALSE;

	MSG msg;
	while (int r = GetMessageW (&msg, NULL, 0, 0))
	{
		if (r == -1)
			return FALSE;

		TranslateMessage (&msg);
		DispatchMessageW (&msg);

		if (msg.message == WM_APP
			&& ObjectCount < 1
			&& !factory.IsServerLocked ())
			break;
	}
	CoRevokeClassObject (cookie);

	return TRUE;
}


static BOOL ComGetInstance (HWND hWnd, ITrueCryptFormatCom **tcServer)
{
	return ComGetInstanceBase (hWnd, CLSID_TrueCryptFormatCom, IID_ITrueCryptFormatCom, (void **) tcServer);
}


ITrueCryptFormatCom *GetElevatedInstance (HWND parent)
{
	ITrueCryptFormatCom *instance;

	if (!ComGetInstance (parent, &instance))
		throw UserAbort (SRC_POS);

	return instance;
}


extern "C" int UacFormatNtfs (HWND hWnd, int driveNo, int clusterSize)
{
	CComPtr<ITrueCryptFormatCom> tc;
	int r;

	CoInitialize (NULL);

	if (ComGetInstance (hWnd, &tc))
		r = tc->FormatNtfs (driveNo, clusterSize);
	else
		r = 0;

	CoUninitialize ();

	return r;
}

extern "C" int UacFormatFs (HWND hWnd, int driveNo, int clusterSize, int fsType)
{
	CComPtr<ITrueCryptFormatCom> tc;
	int r;

	CoInitialize (NULL);

	if (ComGetInstance (hWnd, &tc))
		r = tc->FormatFs (driveNo, clusterSize, fsType);
	else
		r = 0;

	CoUninitialize ();

	return r;
}


extern "C" int UacAnalyzeHiddenVolumeHost (HWND hwndDlg, int *driveNo, __int64 hiddenVolHostSize, int *realClusterSize, __int64 *nbrFreeClusters)
{
	CComPtr<ITrueCryptFormatCom> tc;
	int r;

	CoInitialize (NULL);

	if (ComGetInstance (hwndDlg, &tc))
		r = tc->AnalyzeHiddenVolumeHost ((LONG_PTR) hwndDlg, driveNo, hiddenVolHostSize, realClusterSize, nbrFreeClusters);
	else
		r = 0;

	CoUninitialize ();

	return r;
}