1 /** @file 2 Implement TPM2 Miscellanenous related command. 3 4 Copyright (c) 2013 - 2016, 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 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 goto Done; 102 } 103 104 if (RecvBufferSize < sizeof (TPM2_RESPONSE_HEADER)) { 105 DEBUG ((EFI_D_ERROR, "Tpm2SetAlgorithmSet - RecvBufferSize Error - %x\n", RecvBufferSize)); 106 Status = EFI_DEVICE_ERROR; 107 goto Done; 108 } 109 if (SwapBytes32(RecvBuffer.Header.responseCode) != TPM_RC_SUCCESS) { 110 DEBUG ((EFI_D_ERROR, "Tpm2SetAlgorithmSet - responseCode - %x\n", SwapBytes32(RecvBuffer.Header.responseCode))); 111 Status = EFI_DEVICE_ERROR; 112 goto Done; 113 } 114 115 Done: 116 // 117 // Clear AuthSession Content 118 // 119 ZeroMem (&SendBuffer, sizeof(SendBuffer)); 120 ZeroMem (&RecvBuffer, sizeof(RecvBuffer)); 121 return Status; 122 } 123
