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
|
/** @file
This is DCS boot loader application
Copyright (c) 2016. Disk Cryptography Services for EFI (DCS), Alex Kolotnikov
Copyright (c) 2016. VeraCrypt, Mounir IDRASSI
This program and the accompanying materials
are licensed and made available under the terms and conditions
of the GNU Lesser General Public License, version 3.0 (LGPL-3.0).
The full text of the license may be found at
https://opensource.org/licenses/LGPL-3.0
**/
#include <Uefi.h>
#include <Library/CommonLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DevicePathLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/PrintLib.h>
#include "DcsConfig.h"
#include <Guid/Gpt.h>
#include <Guid/GlobalVariable.h>
EFI_GUID ImagePartGuid;
EFI_GUID *gEfiExecPartGuid = &ImagePartGuid;
CHAR16 *gEfiExecCmdDefault = L"\\EFI\\Microsoft\\Boot\\Bootmgfw.efi";
CHAR16 *gEfiExecCmd = NULL;
CHAR8 gDoExecCmdMsg[256];
EFI_STATUS
DoExecCmd()
{
EFI_STATUS res;
gDoExecCmdMsg[0] = 0;
res = EfiFindPartByGUID(gEfiExecPartGuid, &gFileRootHandle);
if (!EFI_ERROR(res)) {
res = FileOpenRoot(gFileRootHandle, &gFileRoot);
if (!EFI_ERROR(res)) {
res = EfiExec(NULL, gEfiExecCmd);
AsciiSPrint(gDoExecCmdMsg, sizeof(gDoExecCmdMsg), "\nCan't exec %s start partition %g\n", gEfiExecCmd, gEfiExecPartGuid);
} else {
AsciiSPrint(gDoExecCmdMsg, sizeof(gDoExecCmdMsg), "\nCan't open start partition %g\n", gEfiExecPartGuid);
}
} else {
AsciiSPrint(gDoExecCmdMsg, sizeof(gDoExecCmdMsg), "\nCan't find start partition %g\n", gEfiExecPartGuid);
}
return res;
}
//////////////////////////////////////////////////////////////////////////
// BML
//////////////////////////////////////////////////////////////////////////
CHAR16* sDcsBmlEfi = L"EFI\\VeraCrypt\\DcsBml.dcs";
CHAR16* sDcsBmlEfiDesc = L"VeraCrypt(DcsBml) driver";
CHAR16* sDcsBmlDriverVar = L"DriverDC5B";
UINT16 sDcsBmlDriverNum = 0x0DC5B;
VOID
UpdateDriverBmlStart() {
EFI_STATUS res;
UINTN len;
UINT32 attr;
int drvInst;
CHAR16* tmp = NULL;
// Driver load selected?
drvInst = ConfigReadInt("DcsBmlDriver", 1);
if (drvInst) {
res = EfiGetVar(sDcsBmlDriverVar, &gEfiGlobalVariableGuid, &tmp, &len, &attr);
// Driver installed?
if (EFI_ERROR(res)) {
// No -> install
res = BootMenuItemCreate(sDcsBmlDriverVar, sDcsBmlEfiDesc, gFileRootHandle, sDcsBmlEfi, FALSE);
if (!EFI_ERROR(res)) {
len = 0;
res = EfiGetVar(L"DriverOrder", &gEfiGlobalVariableGuid, &tmp, &len, &attr);
if (!EFI_ERROR(res)) len = len / 2;
res = BootOrderInsert(L"DriverOrder", len, sDcsBmlDriverNum);
}
}
MEM_FREE(tmp);
}
else {
// uninstall driver
res = EfiGetVar(sDcsBmlDriverVar, &gEfiGlobalVariableGuid, &tmp, &len, &attr);
if (!EFI_ERROR(res)) {
BootMenuItemRemove(sDcsBmlDriverVar);
BootOrderRemove(L"DriverOrder", sDcsBmlDriverNum);
}
}
MEM_FREE(tmp);
}
/**
The actual entry point for the application.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point executed successfully.
@retval other Some error occur when executing this entry point.
**/
EFI_STATUS
EFIAPI
DcsBootMain(
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS res;
UINTN len;
UINT32 attr;
BOOLEAN searchOnESP = FALSE;
// EFI_INPUT_KEY key;
InitBio();
res = InitFS();
if (EFI_ERROR(res)) {
ERR_PRINT(L"InitFS %r\n", res);
}
// BML installed?
if (EFI_ERROR(InitBml())) {
// if not -> execute
EfiExec(NULL, sDcsBmlEfi);
}
UpdateDriverBmlStart();
// Try platform info
if (EFI_ERROR(FileExist(NULL, L"\\EFI\\VeraCrypt\\PlatformInfo")) &&
!EFI_ERROR(FileExist(NULL, L"\\EFI\\VeraCrypt\\DcsInfo.dcs"))) {
res = EfiExec(NULL, L"\\EFI\\VeraCrypt\\DcsInfo.dcs");
if (!EFI_ERROR(res) &&
!EFI_ERROR(FileExist(NULL, L"\\EFI\\VeraCrypt\\PlatformInfo"))) {
gST->RuntimeServices->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
}
}
// Load all drivers
res = EfiExec(NULL, L"\\EFI\\VeraCrypt\\LegacySpeaker.dcs");
res = EfiGetPartGUID(gFileRootHandle, &ImagePartGuid);
if (EFI_ERROR(res)) {
ERR_PRINT(L"\nStart partition %r\n", res);
return res;
}
EfiSetVar(L"DcsExecPartGuid", NULL, &ImagePartGuid, sizeof(EFI_GUID), EFI_VARIABLE_BOOTSERVICE_ACCESS);
EfiSetVar(L"DcsExecCmd", NULL, gEfiExecCmdDefault, (StrLen(gEfiExecCmdDefault) + 1) * 2, EFI_VARIABLE_BOOTSERVICE_ACCESS);
// Authorize
res = EfiExec(NULL, L"\\EFI\\VeraCrypt\\DcsInt.dcs");
if (EFI_ERROR(res)) {
// ERR_PRINT(L"\nDcsInt.efi %r\n",res);
return res;
}
res = EfiGetVar(L"DcsExecPartGuid", NULL, &gEfiExecPartGuid, &len, &attr);
if (EFI_ERROR(res)) {
gEfiExecPartGuid = &ImagePartGuid;
}
res = EfiGetVar(L"DcsExecCmd", NULL, &gEfiExecCmd, &len, &attr);
if (EFI_ERROR(res)) {
gEfiExecCmd = gEfiExecCmdDefault;
}
searchOnESP = CompareGuid(gEfiExecPartGuid, &ImagePartGuid) &&
EFI_ERROR(FileExist(NULL, gEfiExecCmd));
// Clear DcsExecPartGuid before execute OS to avoid problem in VirtualBox with reboot.
EfiSetVar(L"DcsExecPartGuid", NULL, NULL, 0, EFI_VARIABLE_BOOTSERVICE_ACCESS);
EfiSetVar(L"DcsExecCmd", NULL, NULL, 0, EFI_VARIABLE_BOOTSERVICE_ACCESS);
// Find new start partition
ConnectAllEfi();
InitBio();
res = InitFS();
// Default load of bootmgfw?
if (searchOnESP) {
// gEfiExecCmd is not found on start partition. Try from ESP
EFI_BLOCK_IO_PROTOCOL *bio = NULL;
EFI_PARTITION_TABLE_HEADER *gptHdr = NULL;
EFI_PARTITION_ENTRY *gptEntry = NULL;
HARDDRIVE_DEVICE_PATH hdp;
EFI_HANDLE disk;
if (!EFI_ERROR(res = EfiGetPartDetails(gFileRootHandle, &hdp, &disk))) {
if ((bio = EfiGetBlockIO(disk)) != NULL) {
if (!EFI_ERROR(res = GptReadHeader(bio, 1, &gptHdr)) &&
!EFI_ERROR(res = GptReadEntryArray(bio, gptHdr, &gptEntry))) {
UINT32 i;
for (i = 0; i < gptHdr->NumberOfPartitionEntries; ++i) {
if (CompareGuid(&gptEntry[i].PartitionTypeGUID, &gEfiPartTypeSystemPartGuid)) {
// select ESP GUID
CopyGuid(gEfiExecPartGuid, &gptEntry[i].UniquePartitionGUID);
res = DoExecCmd();
if(EFI_ERROR(res)) continue;
}
}
}
}
}
} else {
res = DoExecCmd();
}
ERR_PRINT(L"%a\nStatus - %r", gDoExecCmdMsg, res);
EfiCpuHalt();
return EFI_INVALID_PARAMETER;
}
|