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
|
/** @file
This library is used by other modules to measure data to TPM.
Copyright (c) 2020, Intel Corporation. All rights reserved. <BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi/UefiBaseType.h>
#include <Pi/PiFirmwareVolume.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/ReportStatusCodeLib.h>
#include <Library/PcdLib.h>
#include <Library/PrintLib.h>
#include <Library/TcgEventLogRecordLib.h>
#include <Library/TpmMeasurementLib.h>
#include <IndustryStandard/UefiTcgPlatform.h>
/**
Get the FvName from the FV header.
Causion: The FV is untrusted input.
@param[in] FvBase Base address of FV image.
@param[in] FvLength Length of FV image.
@return FvName pointer
@retval NULL FvName is NOT found
**/
VOID *
TpmMeasurementGetFvName (
IN EFI_PHYSICAL_ADDRESS FvBase,
IN UINT64 FvLength
)
{
EFI_FIRMWARE_VOLUME_HEADER *FvHeader;
EFI_FIRMWARE_VOLUME_EXT_HEADER *FvExtHeader;
if (FvBase >= MAX_ADDRESS) {
return NULL;
}
if (FvLength >= MAX_ADDRESS - FvBase) {
return NULL;
}
if (FvLength < sizeof(EFI_FIRMWARE_VOLUME_HEADER)) {
return NULL;
}
FvHeader = (EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)FvBase;
if (FvHeader->Signature != EFI_FVH_SIGNATURE) {
return NULL;
}
if (FvHeader->ExtHeaderOffset < sizeof(EFI_FIRMWARE_VOLUME_HEADER)) {
return NULL;
}
if (FvHeader->ExtHeaderOffset + sizeof(EFI_FIRMWARE_VOLUME_EXT_HEADER) > FvLength) {
return NULL;
}
FvExtHeader = (EFI_FIRMWARE_VOLUME_EXT_HEADER *)(UINTN)(FvBase + FvHeader->ExtHeaderOffset);
return &FvExtHeader->FvName;
}
/**
Measure a FirmwareBlob.
@param[in] PcrIndex PcrIndex of the measurement.
@param[in] Description Description for this FirmwareBlob.
@param[in] FirmwareBlobBase Base address of this FirmwareBlob.
@param[in] FirmwareBlobLength Size in bytes of this FirmwareBlob.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_UNSUPPORTED TPM device not available.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
EFIAPI
MeasureFirmwareBlob (
IN UINT32 PcrIndex,
IN CHAR8 *Description OPTIONAL,
IN EFI_PHYSICAL_ADDRESS FirmwareBlobBase,
IN UINT64 FirmwareBlobLength
)
{
EFI_PLATFORM_FIRMWARE_BLOB FvBlob;
PLATFORM_FIRMWARE_BLOB2_STRUCT FvBlob2;
VOID *FvName;
UINT32 EventType;
VOID *EventLog;
UINT32 EventLogSize;
EFI_STATUS Status;
FvName = TpmMeasurementGetFvName (FirmwareBlobBase, FirmwareBlobLength);
if (((Description != NULL) || (FvName != NULL)) &&
(PcdGet32(PcdTcgPfpMeasurementRevision) >= TCG_EfiSpecIDEventStruct_SPEC_ERRATA_TPM2_REV_105)) {
if (Description != NULL) {
AsciiSPrint((CHAR8*)FvBlob2.BlobDescription, sizeof(FvBlob2.BlobDescription), "%a", Description);
} else {
AsciiSPrint((CHAR8*)FvBlob2.BlobDescription, sizeof(FvBlob2.BlobDescription), "Fv(%g)", FvName);
}
FvBlob2.BlobDescriptionSize = sizeof(FvBlob2.BlobDescription);
FvBlob2.BlobBase = FirmwareBlobBase;
FvBlob2.BlobLength = FirmwareBlobLength;
EventType = EV_EFI_PLATFORM_FIRMWARE_BLOB2;
EventLog = &FvBlob2;
EventLogSize = sizeof(FvBlob2);
} else {
FvBlob.BlobBase = FirmwareBlobBase;
FvBlob.BlobLength = FirmwareBlobLength;
EventType = EV_EFI_PLATFORM_FIRMWARE_BLOB;
EventLog = &FvBlob;
EventLogSize = sizeof(FvBlob);
}
Status = TpmMeasureAndLogData (
PcrIndex,
EventType,
EventLog,
EventLogSize,
(VOID*)(UINTN)FirmwareBlobBase,
FirmwareBlobLength
);
return Status;
}
/**
Measure a HandoffTable.
@param[in] PcrIndex PcrIndex of the measurement.
@param[in] Description Description for this HandoffTable.
@param[in] TableGuid GUID of this HandoffTable.
@param[in] TableAddress Base address of this HandoffTable.
@param[in] TableLength Size in bytes of this HandoffTable.
@retval EFI_SUCCESS Operation completed successfully.
@retval EFI_UNSUPPORTED TPM device not available.
@retval EFI_OUT_OF_RESOURCES Out of memory.
@retval EFI_DEVICE_ERROR The operation was unsuccessful.
**/
EFI_STATUS
EFIAPI
MeasureHandoffTable (
IN UINT32 PcrIndex,
IN CHAR8 *Description OPTIONAL,
IN EFI_GUID *TableGuid,
IN VOID *TableAddress,
IN UINTN TableLength
)
{
EFI_HANDOFF_TABLE_POINTERS HandoffTables;
HANDOFF_TABLE_POINTERS2_STRUCT HandoffTables2;
UINT32 EventType;
VOID *EventLog;
UINT32 EventLogSize;
EFI_STATUS Status;
if ((Description != NULL) &&
(PcdGet32(PcdTcgPfpMeasurementRevision) >= TCG_EfiSpecIDEventStruct_SPEC_ERRATA_TPM2_REV_105)) {
AsciiSPrint((CHAR8*)HandoffTables2.TableDescription, sizeof(HandoffTables2.TableDescription), "%a", Description);
HandoffTables2.TableDescriptionSize = sizeof(HandoffTables2.TableDescription);
HandoffTables2.NumberOfTables = 1;
CopyGuid (&(HandoffTables2.TableEntry[0].VendorGuid), TableGuid);
HandoffTables2.TableEntry[0].VendorTable = TableAddress;
EventType = EV_EFI_HANDOFF_TABLES2;
EventLog = &HandoffTables2;
EventLogSize = sizeof(HandoffTables2);
} else {
HandoffTables.NumberOfTables = 1;
CopyGuid (&(HandoffTables.TableEntry[0].VendorGuid), TableGuid);
HandoffTables.TableEntry[0].VendorTable = TableAddress;
EventType = EV_EFI_HANDOFF_TABLES;
EventLog = &HandoffTables;
EventLogSize = sizeof(HandoffTables);
}
Status = TpmMeasureAndLogData (
PcrIndex,
EventType,
EventLog,
EventLogSize,
TableAddress,
TableLength
);
return Status;
}
|
