1 /** @file
2 This library is used by other modules to measure data to TPM.
3
4 Copyright (c) 2020, Intel Corporation. All rights reserved. <BR>
5 SPDX-License-Identifier: BSD-2-Clause-Patent
6
7 **/
8
9 #include <PiPei.h>
10
11 #include <Library/BaseMemoryLib.h>
12 #include <Library/PeiServicesLib.h>
13 #include <Library/PeiServicesTablePointerLib.h>
14 #include <Library/DebugLib.h>
15 #include <Library/HobLib.h>
16 #include <Library/TpmMeasurementLib.h>
17
18 #include <Ppi/Tcg.h>
19 #include <IndustryStandard/UefiTcgPlatform.h>
20
21 /**
22 Tpm measure and log data, and extend the measurement result into a specific PCR.
23
24 @param[in] PcrIndex PCR Index.
25 @param[in] EventType Event type.
26 @param[in] EventLog Measurement event log.
27 @param[in] LogLen Event log length in bytes.
28 @param[in] HashData The start of the data buffer to be hashed, extended.
29 @param[in] HashDataLen The length, in bytes, of the buffer referenced by HashData
30
31 @retval EFI_SUCCESS Operation completed successfully.
32 @retval EFI_UNSUPPORTED TPM device not available.
33 @retval EFI_OUT_OF_RESOURCES Out of memory.
34 @retval EFI_DEVICE_ERROR The operation was unsuccessful.
35 **/
36 EFI_STATUS
37 EFIAPI
TpmMeasureAndLogData(IN UINT32 PcrIndex,IN UINT32 EventType,IN VOID * EventLog,IN UINT32 LogLen,IN VOID * HashData,IN UINT64 HashDataLen)38 TpmMeasureAndLogData (
39 IN UINT32 PcrIndex,
40 IN UINT32 EventType,
41 IN VOID *EventLog,
42 IN UINT32 LogLen,
43 IN VOID *HashData,
44 IN UINT64 HashDataLen
45 )
46 {
47 EFI_STATUS Status;
48 EDKII_TCG_PPI *TcgPpi;
49 TCG_PCR_EVENT_HDR TcgEventHdr;
50
51 Status = PeiServicesLocatePpi (
52 &gEdkiiTcgPpiGuid,
53 0,
54 NULL,
55 (VOID**)&TcgPpi
56 );
57 if (EFI_ERROR(Status)) {
58 return Status;
59 }
60
61 TcgEventHdr.PCRIndex = PcrIndex;
62 TcgEventHdr.EventType = EventType;
63 TcgEventHdr.EventSize = LogLen;
64
65 Status = TcgPpi->HashLogExtendEvent (
66 TcgPpi,
67 0,
68 HashData,
69 (UINTN)HashDataLen,
70 &TcgEventHdr,
71 EventLog
72 );
73 return Status;
74 }
75