1 /** @file
2 Implement TPM2 Miscellanenous related command.
3
4 Copyright (c) 2013, 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 <IndustryStandard/UefiTcgPlatform.h>
16 #include <Library/Tpm2CommandLib.h>
17 #include <Library/Tpm2DeviceLib.h>
18 #include <Library/BaseMemoryLib.h>
19 #include <Library/BaseLib.h>
20 #include <Library/DebugLib.h>
21
22 #pragma pack(1)
23
24 typedef struct {
25 TPM2_COMMAND_HEADER Header;
26 TPMI_RH_HIERARCHY_AUTH AuthHandle;
27 UINT32 AuthSessionSize;
28 TPMS_AUTH_COMMAND AuthSession;
29 UINT32 AlgorithmSet;
30 } TPM2_SET_ALGORITHM_SET_COMMAND;
31
32 typedef struct {
33 TPM2_RESPONSE_HEADER Header;
34 UINT32 AuthSessionSize;
35 TPMS_AUTH_RESPONSE AuthSession;
36 } TPM2_SET_ALGORITHM_SET_RESPONSE;
37
38 #pragma pack()
39
40 /**
41 This command allows the platform to change the set of algorithms that are used by the TPM.
42 The algorithmSet setting is a vendor-dependent value.
43
44 @param[in] AuthHandle TPM_RH_PLATFORM
45 @param[in] AuthSession Auth Session context
46 @param[in] AlgorithmSet A TPM vendor-dependent value indicating the
47 algorithm set selection
48
49 @retval EFI_SUCCESS Operation completed successfully.
50 @retval EFI_DEVICE_ERROR Unexpected device behavior.
51 **/
52 EFI_STATUS
53 EFIAPI
Tpm2SetAlgorithmSet(IN TPMI_RH_PLATFORM AuthHandle,IN TPMS_AUTH_COMMAND * AuthSession,IN UINT32 AlgorithmSet)54 Tpm2SetAlgorithmSet (
55 IN TPMI_RH_PLATFORM AuthHandle,
56 IN TPMS_AUTH_COMMAND *AuthSession,
57 IN UINT32 AlgorithmSet
58 )
59 {
60 EFI_STATUS Status;
61 TPM2_SET_ALGORITHM_SET_COMMAND SendBuffer;
62 TPM2_SET_ALGORITHM_SET_RESPONSE RecvBuffer;
63 UINT32 SendBufferSize;
64 UINT32 RecvBufferSize;
65 UINT8 *Buffer;
66 UINT32 SessionInfoSize;
67
68 //
69 // Construct command
70 //
71 SendBuffer.Header.tag = SwapBytes16(TPM_ST_SESSIONS);
72 SendBuffer.Header.commandCode = SwapBytes32(TPM_CC_SetAlgorithmSet);
73
74 SendBuffer.AuthHandle = SwapBytes32 (AuthHandle);
75
76 //
77 // Add in Auth session
78 //
79 Buffer = (UINT8 *)&SendBuffer.AuthSession;
80
81 // sessionInfoSize
82 SessionInfoSize = CopyAuthSessionCommand (AuthSession, Buffer);
83 Buffer += SessionInfoSize;
84 SendBuffer.AuthSessionSize = SwapBytes32(SessionInfoSize);
85
86 //
87 // Real data
88 //
89 WriteUnaligned32 ((UINT32 *)Buffer, SwapBytes32(AlgorithmSet));
90 Buffer += sizeof(UINT32);
91
92 SendBufferSize = (UINT32)((UINTN)Buffer - (UINTN)&SendBuffer);
93 SendBuffer.Header.paramSize = SwapBytes32 (SendBufferSize);
94
95 //
96 // send Tpm command
97 //
98 RecvBufferSize = sizeof (RecvBuffer);
99 Status = Tpm2SubmitCommand (SendBufferSize, (UINT8 *)&SendBuffer, &RecvBufferSize, (UINT8 *)&RecvBuffer);
100 if (EFI_ERROR (Status)) {
101 return Status;
102 }
103
104 if (RecvBufferSize < sizeof (TPM2_RESPONSE_HEADER)) {
105 DEBUG ((EFI_D_ERROR, "Tpm2SetAlgorithmSet - RecvBufferSize Error - %x\n", RecvBufferSize));
106 return EFI_DEVICE_ERROR;
107 }
108 if (SwapBytes32(RecvBuffer.Header.responseCode) != TPM_RC_SUCCESS) {
109 DEBUG ((EFI_D_ERROR, "Tpm2SetAlgorithmSet - responseCode - %x\n", SwapBytes32(RecvBuffer.Header.responseCode)));
110 return EFI_DEVICE_ERROR;
111 }
112
113 return EFI_SUCCESS;
114 }
115