projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 967eacca JY |
1 | /** @file\r |
| 2 | Implement TPM2 Context related command.\r | |
| 3 | \r | |
| 4 | Copyright (c) 2014, Intel Corporation. All rights reserved. <BR>\r | |
| 5 | This program and the accompanying materials\r | |
| 6 | are licensed and made available under the terms and conditions of the BSD License\r | |
| 7 | which accompanies this distribution. The full text of the license may be found at\r | |
| 8 | http://opensource.org/licenses/bsd-license.php\r | |
| 9 | \r | |
| 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 12 | \r | |
| 13 | **/\r | |
| 14 | \r | |
| 15 | #include <IndustryStandard/UefiTcgPlatform.h>\r | |
| 16 | #include <Library/Tpm2CommandLib.h>\r | |
| 17 | #include <Library/Tpm2DeviceLib.h>\r | |
| 18 | #include <Library/BaseMemoryLib.h>\r | |
| 19 | #include <Library/BaseLib.h>\r | |
| 20 | #include <Library/DebugLib.h>\r | |
| 21 | \r | |
| 22 | #pragma pack(1)\r | |
| 23 | \r | |
| 24 | typedef struct {\r | |
| 25 | TPM2_COMMAND_HEADER Header;\r | |
| 26 | TPMI_DH_CONTEXT FlushHandle;\r | |
| 27 | } TPM2_FLUSH_CONTEXT_COMMAND;\r | |
| 28 | \r | |
| 29 | typedef struct {\r | |
| 30 | TPM2_RESPONSE_HEADER Header;\r | |
| 31 | } TPM2_FLUSH_CONTEXT_RESPONSE;\r | |
| 32 | \r | |
| 33 | #pragma pack()\r | |
| 34 | \r | |
| 35 | /**\r | |
| 36 | This command causes all context associated with a loaded object or session to be removed from TPM memory.\r | |
| 37 | \r | |
| 38 | @param[in] FlushHandle The handle of the item to flush.\r | |
| 39 | \r | |
| 40 | @retval EFI_SUCCESS Operation completed successfully.\r | |
| 41 | @retval EFI_DEVICE_ERROR The command was unsuccessful.\r | |
| 42 | **/\r | |
| 43 | EFI_STATUS\r | |
| 44 | EFIAPI\r | |
| 45 | Tpm2FlushContext (\r | |
| 46 | IN TPMI_DH_CONTEXT FlushHandle\r | |
| 47 | )\r | |
| 48 | {\r | |
| 49 | EFI_STATUS Status;\r | |
| 50 | TPM2_FLUSH_CONTEXT_COMMAND SendBuffer;\r | |
| 51 | TPM2_FLUSH_CONTEXT_RESPONSE RecvBuffer;\r | |
| 52 | UINT32 SendBufferSize;\r | |
| 53 | UINT32 RecvBufferSize;\r | |
| 54 | \r | |
| 55 | //\r | |
| 56 | // Construct command\r | |
| 57 | //\r | |
| 58 | SendBuffer.Header.tag = SwapBytes16(TPM_ST_NO_SESSIONS);\r | |
| 59 | SendBuffer.Header.commandCode = SwapBytes32(TPM_CC_FlushContext);\r | |
| 60 | \r | |
| 61 | SendBuffer.FlushHandle = SwapBytes32 (FlushHandle);\r | |
| 62 | \r | |
| 63 | SendBufferSize = (UINT32) sizeof (SendBuffer);\r | |
| 64 | SendBuffer.Header.paramSize = SwapBytes32 (SendBufferSize);\r | |
| 65 | \r | |
| 66 | //\r | |
| 67 | // send Tpm command\r | |
| 68 | //\r | |
| 69 | RecvBufferSize = sizeof (RecvBuffer);\r | |
| 70 | Status = Tpm2SubmitCommand (SendBufferSize, (UINT8 *)&SendBuffer, &RecvBufferSize, (UINT8 *)&RecvBuffer);\r | |
| 71 | if (EFI_ERROR (Status)) {\r | |
| 72 | return Status;\r | |
| 73 | }\r | |
| 74 | \r | |
| 75 | if (RecvBufferSize < sizeof (TPM2_RESPONSE_HEADER)) {\r | |
| 76 | DEBUG ((EFI_D_ERROR, "Tpm2FlushContext - RecvBufferSize Error - %x\n", RecvBufferSize));\r | |
| 77 | return EFI_DEVICE_ERROR;\r | |
| 78 | }\r | |
| 79 | if (SwapBytes32(RecvBuffer.Header.responseCode) != TPM_RC_SUCCESS) {\r | |
| 80 | DEBUG ((EFI_D_ERROR, "Tpm2FlushContext - responseCode - %x\n", SwapBytes32(RecvBuffer.Header.responseCode)));\r | |
| 81 | return EFI_DEVICE_ERROR;\r | |
| 82 | }\r | |
| 83 | \r | |
| 84 | return EFI_SUCCESS;\r | |
| 85 | }\r | |
| 86 | \r |