1 /** @file 2 This library is used by other modules to measure data to TPM. 3 4 Copyright (c) 2012 - 2015, Intel Corporation. All rights reserved. <BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 #include <PiDxe.h> 16 17 #include <Protocol/TcgService.h> 18 #include <Protocol/Tcg2Protocol.h> 19 20 #include <Library/BaseMemoryLib.h> 21 #include <Library/MemoryAllocationLib.h> 22 #include <Library/UefiBootServicesTableLib.h> 23 #include <Library/DebugLib.h> 24 #include <Library/TpmMeasurementLib.h> 25 26 #include <Guid/Acpi.h> 27 #include <IndustryStandard/Acpi.h> 28 29 30 31 /** 32 Tpm12 measure and log data, and extend the measurement result into a specific PCR. 33 34 @param[in] PcrIndex PCR Index. 35 @param[in] EventType Event type. 36 @param[in] EventLog Measurement event log. 37 @param[in] LogLen Event log length in bytes. 38 @param[in] HashData The start of the data buffer to be hashed, extended. 39 @param[in] HashDataLen The length, in bytes, of the buffer referenced by HashData 40 41 @retval EFI_SUCCESS Operation completed successfully. 42 @retval EFI_UNSUPPORTED TPM device not available. 43 @retval EFI_OUT_OF_RESOURCES Out of memory. 44 @retval EFI_DEVICE_ERROR The operation was unsuccessful. 45 **/ 46 EFI_STATUS 47 Tpm12MeasureAndLogData ( 48 IN UINT32 PcrIndex, 49 IN UINT32 EventType, 50 IN VOID *EventLog, 51 IN UINT32 LogLen, 52 IN VOID *HashData, 53 IN UINT64 HashDataLen 54 ) 55 { 56 EFI_STATUS Status; 57 EFI_TCG_PROTOCOL *TcgProtocol; 58 TCG_PCR_EVENT *TcgEvent; 59 EFI_PHYSICAL_ADDRESS EventLogLastEntry; 60 UINT32 EventNumber; 61 62 TcgEvent = NULL; 63 64 // 65 // Tpm active/deactive state is checked in HashLogExtendEvent 66 // 67 Status = gBS->LocateProtocol (&gEfiTcgProtocolGuid, NULL, (VOID **) &TcgProtocol); 68 if (EFI_ERROR(Status)){ 69 return Status; 70 } 71 72 TcgEvent = (TCG_PCR_EVENT *)AllocateZeroPool (sizeof (TCG_PCR_EVENT_HDR) + LogLen); 73 if(TcgEvent == NULL) { 74 return EFI_OUT_OF_RESOURCES; 75 } 76 77 TcgEvent->PCRIndex = PcrIndex; 78 TcgEvent->EventType = EventType; 79 TcgEvent->EventSize = LogLen; 80 CopyMem (&TcgEvent->Event[0], EventLog, LogLen); 81 EventNumber = 1; 82 Status = TcgProtocol->HashLogExtendEvent ( 83 TcgProtocol, 84 (EFI_PHYSICAL_ADDRESS)(UINTN)HashData, 85 HashDataLen, 86 TPM_ALG_SHA, 87 TcgEvent, 88 &EventNumber, 89 &EventLogLastEntry 90 ); 91 92 FreePool (TcgEvent); 93 94 return Status; 95 } 96 97 /** 98 Tpm20 measure and log data, and extend the measurement result into a specific PCR. 99 100 @param[in] PcrIndex PCR Index. 101 @param[in] EventType Event type. 102 @param[in] EventLog Measurement event log. 103 @param[in] LogLen Event log length in bytes. 104 @param[in] HashData The start of the data buffer to be hashed, extended. 105 @param[in] HashDataLen The length, in bytes, of the buffer referenced by HashData 106 107 @retval EFI_SUCCESS Operation completed successfully. 108 @retval EFI_UNSUPPORTED TPM device not available. 109 @retval EFI_OUT_OF_RESOURCES Out of memory. 110 @retval EFI_DEVICE_ERROR The operation was unsuccessful. 111 **/ 112 EFI_STATUS 113 Tpm20MeasureAndLogData ( 114 IN UINT32 PcrIndex, 115 IN UINT32 EventType, 116 IN VOID *EventLog, 117 IN UINT32 LogLen, 118 IN VOID *HashData, 119 IN UINT64 HashDataLen 120 ) 121 { 122 EFI_STATUS Status; 123 EFI_TCG2_PROTOCOL *Tcg2Protocol; 124 EFI_TCG2_EVENT *Tcg2Event; 125 126 // 127 // TPMPresentFlag is checked in HashLogExtendEvent 128 // 129 Status = gBS->LocateProtocol (&gEfiTcg2ProtocolGuid, NULL, (VOID **) &Tcg2Protocol); 130 if (EFI_ERROR (Status)) { 131 return Status; 132 } 133 134 Tcg2Event = (EFI_TCG2_EVENT *) AllocateZeroPool (LogLen + sizeof (EFI_TCG2_EVENT)); 135 if(Tcg2Event == NULL) { 136 return EFI_OUT_OF_RESOURCES; 137 } 138 139 Tcg2Event->Size = (UINT32)LogLen + sizeof (EFI_TCG2_EVENT) - sizeof(Tcg2Event->Event); 140 Tcg2Event->Header.HeaderSize = sizeof(EFI_TCG2_EVENT_HEADER); 141 Tcg2Event->Header.HeaderVersion = EFI_TCG2_EVENT_HEADER_VERSION; 142 Tcg2Event->Header.PCRIndex = PcrIndex; 143 Tcg2Event->Header.EventType = EventType; 144 CopyMem (&Tcg2Event->Event[0], EventLog, LogLen); 145 146 Status = Tcg2Protocol->HashLogExtendEvent ( 147 Tcg2Protocol, 148 0, 149 (EFI_PHYSICAL_ADDRESS)(UINTN)HashData, 150 HashDataLen, 151 Tcg2Event 152 ); 153 FreePool (Tcg2Event); 154 155 return Status; 156 } 157 158 /** 159 Tpm measure and log data, and extend the measurement result into a specific PCR. 160 161 @param[in] PcrIndex PCR Index. 162 @param[in] EventType Event type. 163 @param[in] EventLog Measurement event log. 164 @param[in] LogLen Event log length in bytes. 165 @param[in] HashData The start of the data buffer to be hashed, extended. 166 @param[in] HashDataLen The length, in bytes, of the buffer referenced by HashData 167 168 @retval EFI_SUCCESS Operation completed successfully. 169 @retval EFI_UNSUPPORTED TPM device not available. 170 @retval EFI_OUT_OF_RESOURCES Out of memory. 171 @retval EFI_DEVICE_ERROR The operation was unsuccessful. 172 **/ 173 EFI_STATUS 174 EFIAPI 175 TpmMeasureAndLogData ( 176 IN UINT32 PcrIndex, 177 IN UINT32 EventType, 178 IN VOID *EventLog, 179 IN UINT32 LogLen, 180 IN VOID *HashData, 181 IN UINT64 HashDataLen 182 ) 183 { 184 EFI_STATUS Status; 185 186 // 187 // Try to measure using Tpm1.2 protocol 188 // 189 Status = Tpm12MeasureAndLogData( 190 PcrIndex, 191 EventType, 192 EventLog, 193 LogLen, 194 HashData, 195 HashDataLen 196 ); 197 if (EFI_ERROR (Status)) { 198 // 199 // Try to measure using Tpm20 protocol 200 // 201 Status = Tpm20MeasureAndLogData( 202 PcrIndex, 203 EventType, 204 EventLog, 205 LogLen, 206 HashData, 207 HashDataLen 208 ); 209 } 210 211 return Status; 212 } 213
