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1 | /** @file\r |
2 | This library is used by other modules to measure data to TPM.\r | |
3 | \r | |
4 | Copyright (c) 2020, Intel Corporation. All rights reserved. <BR>\r | |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
6 | \r | |
7 | **/\r | |
8 | \r | |
9 | #include <Uefi/UefiBaseType.h>\r | |
10 | #include <Pi/PiFirmwareVolume.h>\r | |
11 | \r | |
12 | #include <Library/BaseMemoryLib.h>\r | |
13 | #include <Library/DebugLib.h>\r | |
14 | #include <Library/ReportStatusCodeLib.h>\r | |
15 | #include <Library/PcdLib.h>\r | |
16 | #include <Library/PrintLib.h>\r | |
17 | #include <Library/TcgEventLogRecordLib.h>\r | |
18 | #include <Library/TpmMeasurementLib.h>\r | |
19 | \r | |
20 | #include <IndustryStandard/UefiTcgPlatform.h>\r | |
21 | \r | |
22 | /**\r | |
23 | Get the FvName from the FV header.\r | |
24 | \r | |
25 | Causion: The FV is untrusted input.\r | |
26 | \r | |
27 | @param[in] FvBase Base address of FV image.\r | |
28 | @param[in] FvLength Length of FV image.\r | |
29 | \r | |
30 | @return FvName pointer\r | |
31 | @retval NULL FvName is NOT found\r | |
32 | **/\r | |
33 | VOID *\r | |
34 | TpmMeasurementGetFvName (\r | |
35 | IN EFI_PHYSICAL_ADDRESS FvBase,\r | |
36 | IN UINT64 FvLength\r | |
37 | )\r | |
38 | {\r | |
39 | EFI_FIRMWARE_VOLUME_HEADER *FvHeader;\r | |
40 | EFI_FIRMWARE_VOLUME_EXT_HEADER *FvExtHeader;\r | |
41 | \r | |
42 | if (FvBase >= MAX_ADDRESS) {\r | |
43 | return NULL;\r | |
44 | }\r | |
45 | if (FvLength >= MAX_ADDRESS - FvBase) {\r | |
46 | return NULL;\r | |
47 | }\r | |
48 | if (FvLength < sizeof(EFI_FIRMWARE_VOLUME_HEADER)) {\r | |
49 | return NULL;\r | |
50 | }\r | |
51 | \r | |
52 | FvHeader = (EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)FvBase;\r | |
53 | if (FvHeader->Signature != EFI_FVH_SIGNATURE) {\r | |
54 | return NULL;\r | |
55 | }\r | |
56 | if (FvHeader->ExtHeaderOffset < sizeof(EFI_FIRMWARE_VOLUME_HEADER)) {\r | |
57 | return NULL;\r | |
58 | }\r | |
59 | if (FvHeader->ExtHeaderOffset + sizeof(EFI_FIRMWARE_VOLUME_EXT_HEADER) > FvLength) {\r | |
60 | return NULL;\r | |
61 | }\r | |
62 | FvExtHeader = (EFI_FIRMWARE_VOLUME_EXT_HEADER *)(UINTN)(FvBase + FvHeader->ExtHeaderOffset);\r | |
63 | \r | |
64 | return &FvExtHeader->FvName;\r | |
65 | }\r | |
66 | \r | |
67 | /**\r | |
68 | Measure a FirmwareBlob.\r | |
69 | \r | |
70 | @param[in] PcrIndex PcrIndex of the measurement.\r | |
71 | @param[in] Description Description for this FirmwareBlob.\r | |
72 | @param[in] FirmwareBlobBase Base address of this FirmwareBlob.\r | |
73 | @param[in] FirmwareBlobLength Size in bytes of this FirmwareBlob.\r | |
74 | \r | |
75 | @retval EFI_SUCCESS Operation completed successfully.\r | |
76 | @retval EFI_UNSUPPORTED TPM device not available.\r | |
77 | @retval EFI_OUT_OF_RESOURCES Out of memory.\r | |
78 | @retval EFI_DEVICE_ERROR The operation was unsuccessful.\r | |
79 | **/\r | |
80 | EFI_STATUS\r | |
81 | EFIAPI\r | |
82 | MeasureFirmwareBlob (\r | |
83 | IN UINT32 PcrIndex,\r | |
84 | IN CHAR8 *Description OPTIONAL,\r | |
85 | IN EFI_PHYSICAL_ADDRESS FirmwareBlobBase,\r | |
86 | IN UINT64 FirmwareBlobLength\r | |
87 | )\r | |
88 | {\r | |
89 | EFI_PLATFORM_FIRMWARE_BLOB FvBlob;\r | |
90 | PLATFORM_FIRMWARE_BLOB2_STRUCT FvBlob2;\r | |
91 | VOID *FvName;\r | |
92 | UINT32 EventType;\r | |
93 | VOID *EventLog;\r | |
94 | UINT32 EventLogSize;\r | |
95 | EFI_STATUS Status;\r | |
96 | \r | |
97 | FvName = TpmMeasurementGetFvName (FirmwareBlobBase, FirmwareBlobLength);\r | |
98 | \r | |
99 | if (((Description != NULL) || (FvName != NULL)) &&\r | |
100 | (PcdGet32(PcdTcgPfpMeasurementRevision) >= TCG_EfiSpecIDEventStruct_SPEC_ERRATA_TPM2_REV_105)) {\r | |
101 | if (Description != NULL) {\r | |
102 | AsciiSPrint((CHAR8*)FvBlob2.BlobDescription, sizeof(FvBlob2.BlobDescription), "%a", Description);\r | |
103 | } else {\r | |
104 | AsciiSPrint((CHAR8*)FvBlob2.BlobDescription, sizeof(FvBlob2.BlobDescription), "Fv(%g)", FvName);\r | |
105 | }\r | |
106 | \r | |
107 | FvBlob2.BlobDescriptionSize = sizeof(FvBlob2.BlobDescription);\r | |
108 | FvBlob2.BlobBase = FirmwareBlobBase;\r | |
109 | FvBlob2.BlobLength = FirmwareBlobLength;\r | |
110 | \r | |
111 | EventType = EV_EFI_PLATFORM_FIRMWARE_BLOB2;\r | |
112 | EventLog = &FvBlob2;\r | |
113 | EventLogSize = sizeof(FvBlob2);\r | |
114 | } else {\r | |
115 | FvBlob.BlobBase = FirmwareBlobBase;\r | |
116 | FvBlob.BlobLength = FirmwareBlobLength;\r | |
117 | \r | |
118 | EventType = EV_EFI_PLATFORM_FIRMWARE_BLOB;\r | |
119 | EventLog = &FvBlob;\r | |
120 | EventLogSize = sizeof(FvBlob);\r | |
121 | }\r | |
122 | \r | |
123 | Status = TpmMeasureAndLogData (\r | |
124 | PcrIndex,\r | |
125 | EventType,\r | |
126 | EventLog,\r | |
127 | EventLogSize,\r | |
128 | (VOID*)(UINTN)FirmwareBlobBase,\r | |
129 | FirmwareBlobLength\r | |
130 | );\r | |
131 | \r | |
132 | return Status;\r | |
133 | }\r | |
134 | \r | |
135 | /**\r | |
136 | Measure a HandoffTable.\r | |
137 | \r | |
138 | @param[in] PcrIndex PcrIndex of the measurement.\r | |
139 | @param[in] Description Description for this HandoffTable.\r | |
140 | @param[in] TableGuid GUID of this HandoffTable.\r | |
141 | @param[in] TableAddress Base address of this HandoffTable.\r | |
142 | @param[in] TableLength Size in bytes of this HandoffTable.\r | |
143 | \r | |
144 | @retval EFI_SUCCESS Operation completed successfully.\r | |
145 | @retval EFI_UNSUPPORTED TPM device not available.\r | |
146 | @retval EFI_OUT_OF_RESOURCES Out of memory.\r | |
147 | @retval EFI_DEVICE_ERROR The operation was unsuccessful.\r | |
148 | **/\r | |
149 | EFI_STATUS\r | |
150 | EFIAPI\r | |
151 | MeasureHandoffTable (\r | |
152 | IN UINT32 PcrIndex,\r | |
153 | IN CHAR8 *Description OPTIONAL,\r | |
154 | IN EFI_GUID *TableGuid,\r | |
155 | IN VOID *TableAddress,\r | |
156 | IN UINTN TableLength\r | |
157 | )\r | |
158 | {\r | |
159 | EFI_HANDOFF_TABLE_POINTERS HandoffTables;\r | |
160 | HANDOFF_TABLE_POINTERS2_STRUCT HandoffTables2;\r | |
161 | UINT32 EventType;\r | |
162 | VOID *EventLog;\r | |
163 | UINT32 EventLogSize;\r | |
164 | EFI_STATUS Status;\r | |
165 | \r | |
166 | if ((Description != NULL) &&\r | |
167 | (PcdGet32(PcdTcgPfpMeasurementRevision) >= TCG_EfiSpecIDEventStruct_SPEC_ERRATA_TPM2_REV_105)) {\r | |
168 | AsciiSPrint((CHAR8*)HandoffTables2.TableDescription, sizeof(HandoffTables2.TableDescription), "%a", Description);\r | |
169 | \r | |
170 | HandoffTables2.TableDescriptionSize = sizeof(HandoffTables2.TableDescription);\r | |
171 | HandoffTables2.NumberOfTables = 1;\r | |
172 | CopyGuid (&(HandoffTables2.TableEntry[0].VendorGuid), TableGuid);\r | |
173 | HandoffTables2.TableEntry[0].VendorTable = TableAddress;\r | |
174 | \r | |
175 | EventType = EV_EFI_HANDOFF_TABLES2;\r | |
176 | EventLog = &HandoffTables2;\r | |
177 | EventLogSize = sizeof(HandoffTables2);\r | |
178 | } else {\r | |
179 | HandoffTables.NumberOfTables = 1;\r | |
180 | CopyGuid (&(HandoffTables.TableEntry[0].VendorGuid), TableGuid);\r | |
181 | HandoffTables.TableEntry[0].VendorTable = TableAddress;\r | |
182 | \r | |
183 | EventType = EV_EFI_HANDOFF_TABLES;\r | |
184 | EventLog = &HandoffTables;\r | |
185 | EventLogSize = sizeof(HandoffTables);\r | |
186 | }\r | |
187 | \r | |
188 | Status = TpmMeasureAndLogData (\r | |
189 | PcrIndex,\r | |
190 | EventType,\r | |
191 | EventLog,\r | |
192 | EventLogSize,\r | |
193 | TableAddress,\r | |
194 | TableLength\r | |
195 | );\r | |
196 | return Status;\r | |
197 | }\r |