projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| fc72a6ce LE |
1 | /** @file\r |
| 2 | Implement the InternalTpm12Detect() function on top of the Tpm12DeviceLib\r | |
| 3 | class.\r | |
| 4 | \r | |
| 5 | Copyright (C) 2020, Red Hat, Inc.\r | |
| 6 | \r | |
| 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
| 8 | **/\r | |
| 9 | \r | |
| 10 | #include <Library/BaseLib.h>\r | |
| 11 | #include <Library/Tpm12DeviceLib.h>\r | |
| 12 | \r | |
| 13 | #include "Tpm12Support.h"\r | |
| 14 | \r | |
| 15 | #pragma pack (1)\r | |
| 16 | typedef struct {\r | |
| 17 | TPM_RSP_COMMAND_HDR Hdr;\r | |
| 18 | TPM_CURRENT_TICKS CurrentTicks;\r | |
| 19 | } TPM_RSP_GET_TICKS;\r | |
| 20 | #pragma pack ()\r | |
| 21 | \r | |
| 22 | /**\r | |
| 23 | Probe for the TPM for 1.2 version, by sending TPM1.2 GetTicks\r | |
| 24 | \r | |
| 25 | Sending a TPM1.2 command to a TPM2 should return a TPM1.2\r | |
| 26 | header (tag = 0xc4) and error code (TPM_BADTAG = 0x1e)\r | |
| 27 | \r | |
| 28 | @retval EFI_SUCCESS TPM version 1.2 probing successful.\r | |
| 29 | \r | |
| 30 | @return Error codes propagated from Tpm12SubmitCommand().\r | |
| 31 | **/\r | |
| 32 | STATIC\r | |
| 33 | EFI_STATUS\r | |
| 34 | TestTpm12 (\r | |
| 35 | )\r | |
| 36 | {\r | |
| 37 | EFI_STATUS Status;\r | |
| 38 | TPM_RQU_COMMAND_HDR Command;\r | |
| 39 | TPM_RSP_GET_TICKS Response;\r | |
| 40 | UINT32 Length;\r | |
| 41 | \r | |
| 42 | Command.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);\r | |
| 43 | Command.paramSize = SwapBytes32 (sizeof (Command));\r | |
| 44 | Command.ordinal = SwapBytes32 (TPM_ORD_GetTicks);\r | |
| 45 | \r | |
| 46 | Length = sizeof (Response);\r | |
| 47 | Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length,\r | |
| 48 | (UINT8 *)&Response);\r | |
| 49 | if (EFI_ERROR (Status)) {\r | |
| 50 | return Status;\r | |
| 51 | }\r | |
| 52 | \r | |
| 53 | return EFI_SUCCESS;\r | |
| 54 | }\r | |
| 55 | \r | |
| 56 | /**\r | |
| 57 | Detect the presence of a TPM with interface version 1.2.\r | |
| 58 | \r | |
| 59 | @retval EFI_SUCCESS TPM-1.2 available. The Tpm12RequestUseTpm() and\r | |
| 60 | Tpm12SubmitCommand(TPM_ORD_GetTicks) operations\r | |
| 61 | (from the Tpm12DeviceLib class) have succeeded.\r | |
| 62 | \r | |
| 63 | @return Error codes propagated from Tpm12RequestUseTpm() and\r | |
| 64 | Tpm12SubmitCommand().\r | |
| 65 | **/\r | |
| 66 | EFI_STATUS\r | |
| 67 | InternalTpm12Detect (\r | |
| 68 | VOID\r | |
| 69 | )\r | |
| 70 | {\r | |
| 71 | EFI_STATUS Status;\r | |
| 72 | \r | |
| 73 | Status = Tpm12RequestUseTpm ();\r | |
| 74 | if (EFI_ERROR (Status)) {\r | |
| 75 | return Status;\r | |
| 76 | }\r | |
| 77 | \r | |
| 78 | return TestTpm12 ();\r | |
| 79 | }\r |