[90946] | 1 | /* $Id: DrvTpmHost.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * TPM host access driver.
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| 4 | */
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| 5 |
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| 6 | /*
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[98103] | 7 | * Copyright (C) 2021-2023 Oracle and/or its affiliates.
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[90946] | 8 | *
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[96407] | 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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[90946] | 26 | */
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| 27 |
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| 28 |
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| 29 | /*********************************************************************************************************************************
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| 30 | * Header Files *
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| 31 | *********************************************************************************************************************************/
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[91137] | 32 | #define LOG_GROUP LOG_GROUP_DRV_TPM_HOST
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[90946] | 33 | #include <VBox/vmm/pdmdrv.h>
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| 34 | #include <VBox/vmm/pdmtpmifs.h>
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| 35 | #include <iprt/assert.h>
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| 36 | #include <iprt/mem.h>
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| 37 | #include <iprt/string.h>
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| 38 | #include <iprt/semaphore.h>
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| 39 | #include <iprt/uuid.h>
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| 40 | #include <iprt/tpm.h>
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| 41 |
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| 42 | #include <iprt/formats/tpm.h>
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| 43 |
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| 44 | #include "VBoxDD.h"
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| 45 |
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| 46 |
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| 47 | /*********************************************************************************************************************************
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| 48 | * Defined Constants And Macros *
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| 49 | *********************************************************************************************************************************/
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| 50 |
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| 51 |
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| 52 | /*********************************************************************************************************************************
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| 53 | * Structures and Typedefs *
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| 54 | *********************************************************************************************************************************/
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| 55 |
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| 56 | /**
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[91005] | 57 | * TPM 1.2 buffer size capability response.
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| 58 | */
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| 59 | #pragma pack(1)
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| 60 | typedef struct TPMRESPGETBUFSZ
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| 61 | {
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| 62 | TPMRESPHDR Hdr;
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| 63 | uint32_t u32Length;
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| 64 | uint32_t cbBuf;
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| 65 | } TPMRESPGETBUFSZ;
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| 66 | #pragma pack()
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| 67 | typedef TPMRESPGETBUFSZ *PTPMRESPGETBUFSZ;
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| 68 | typedef const TPMRESPGETBUFSZ *PCTPMRESPGETBUFSZ;
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| 69 |
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| 70 |
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| 71 | /**
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| 72 | * TPM 2.0 buffer size capability response.
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| 73 | */
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| 74 | #pragma pack(1)
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| 75 | typedef struct TPM2RESPGETBUFSZ
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| 76 | {
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| 77 | TPMRESPHDR Hdr;
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| 78 | uint8_t fMore;
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| 79 | uint32_t u32Cap;
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| 80 | uint32_t u32Count;
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| 81 | uint32_t u32Prop;
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| 82 | uint32_t u32Value;
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| 83 | } TPM2RESPGETBUFSZ;
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| 84 | #pragma pack()
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| 85 | typedef TPM2RESPGETBUFSZ *PTPM2RESPGETBUFSZ;
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| 86 | typedef const TPM2RESPGETBUFSZ *PCTPM2RESPGETBUFSZ;
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| 87 |
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| 88 |
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| 89 | /**
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[90946] | 90 | * TPM Host driver instance data.
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| 91 | *
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| 92 | * @implements PDMITPMCONNECTOR
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| 93 | */
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| 94 | typedef struct DRVTPMHOST
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| 95 | {
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| 96 | /** The stream interface. */
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| 97 | PDMITPMCONNECTOR ITpmConnector;
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| 98 | /** Pointer to the driver instance. */
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| 99 | PPDMDRVINS pDrvIns;
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| 100 |
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| 101 | /** Handle to the host TPM. */
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| 102 | RTTPM hTpm;
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[91005] | 103 | /** Cached TPM version. */
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| 104 | TPMVERSION enmTpmVersion;
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| 105 | /** Cached buffer size of the host TPM. */
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| 106 | uint32_t cbBuffer;
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[90946] | 107 | } DRVTPMHOST;
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| 108 | /** Pointer to the TPM emulator instance data. */
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| 109 | typedef DRVTPMHOST *PDRVTPMHOST;
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| 110 |
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| 111 |
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| 112 | /*********************************************************************************************************************************
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| 113 | * Internal Functions *
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| 114 | *********************************************************************************************************************************/
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| 115 |
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[91005] | 116 | /**
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| 117 | * Queries the buffer size of the host TPM.
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| 118 | *
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| 119 | * @returns VBox status code.
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| 120 | * @param pThis The host TPM driver instance data.
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| 121 | */
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| 122 | static int drvTpmHostQueryBufferSize(PDRVTPMHOST pThis)
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| 123 | {
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| 124 | uint8_t abResp[_1K];
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| 125 | int rc = VINF_SUCCESS;
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| 126 |
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| 127 | switch (pThis->enmTpmVersion)
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| 128 | {
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| 129 | case TPMVERSION_1_2:
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| 130 | {
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| 131 | TPMREQGETCAPABILITY Req;
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| 132 |
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| 133 | Req.Hdr.u16Tag = RT_H2BE_U16(TPM_TAG_RQU_COMMAND);
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| 134 | Req.Hdr.cbReq = RT_H2BE_U32(sizeof(Req));
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| 135 | Req.Hdr.u32Ordinal = RT_H2BE_U32(TPM_ORD_GETCAPABILITY);
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| 136 | Req.u32Cap = RT_H2BE_U32(TPM_CAP_PROPERTY);
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| 137 | Req.u32Length = RT_H2BE_U32(sizeof(uint32_t));
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| 138 | Req.u32SubCap = RT_H2BE_U32(TPM_CAP_PROP_INPUT_BUFFER);
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| 139 | rc = RTTpmReqExec(pThis->hTpm, 0 /*bLoc*/, &Req, sizeof(Req), &abResp[0], sizeof(abResp), NULL /*pcbResp*/);
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| 140 | break;
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| 141 | }
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| 142 | case TPMVERSION_2_0:
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| 143 | {
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| 144 | TPM2REQGETCAPABILITY Req;
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| 145 |
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| 146 | Req.Hdr.u16Tag = RT_H2BE_U16(TPM2_ST_NO_SESSIONS);
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| 147 | Req.Hdr.cbReq = RT_H2BE_U32(sizeof(Req));
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| 148 | Req.Hdr.u32Ordinal = RT_H2BE_U32(TPM2_CC_GET_CAPABILITY);
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| 149 | Req.u32Cap = RT_H2BE_U32(TPM2_CAP_TPM_PROPERTIES);
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| 150 | Req.u32Property = RT_H2BE_U32(TPM2_PT_INPUT_BUFFER);
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| 151 | Req.u32Count = RT_H2BE_U32(1);
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| 152 | rc = RTTpmReqExec(pThis->hTpm, 0 /*bLoc*/, &Req, sizeof(Req), &abResp[0], sizeof(abResp), NULL /*pcbResp*/);
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| 153 | break;
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| 154 | }
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| 155 | default:
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| 156 | AssertFailed();
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| 157 | }
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| 158 |
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| 159 | if (RT_SUCCESS(rc))
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| 160 | {
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| 161 | switch (pThis->enmTpmVersion)
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| 162 | {
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| 163 | case TPMVERSION_1_2:
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| 164 | {
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| 165 | PCTPMRESPGETBUFSZ pResp = (PCTPMRESPGETBUFSZ)&abResp[0];
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| 166 |
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| 167 | if ( RTTpmRespGetSz(&pResp->Hdr) == sizeof(*pResp)
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| 168 | && RT_BE2H_U32(pResp->u32Length) == sizeof(uint32_t))
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| 169 | pThis->cbBuffer = RT_BE2H_U32(pResp->cbBuf);
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| 170 | else
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| 171 | rc = VERR_INVALID_PARAMETER;
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| 172 | break;
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| 173 | }
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| 174 | case TPMVERSION_2_0:
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| 175 | {
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| 176 | PCTPM2RESPGETBUFSZ pResp = (PCTPM2RESPGETBUFSZ)&abResp[0];
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| 177 |
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| 178 | if ( RTTpmRespGetSz(&pResp->Hdr) == sizeof(*pResp)
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| 179 | && RT_BE2H_U32(pResp->u32Count) == 1)
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| 180 | pThis->cbBuffer = RT_BE2H_U32(pResp->u32Value);
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| 181 | else
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| 182 | rc = VERR_INVALID_PARAMETER;
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| 183 | break;
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| 184 | }
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| 185 | default:
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| 186 | AssertFailed();
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| 187 | }
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| 188 | }
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| 189 |
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| 190 | return rc;
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| 191 | }
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| 192 |
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| 193 |
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[90946] | 194 | /** @interface_method_impl{PDMITPMCONNECTOR,pfnGetVersion} */
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| 195 | static DECLCALLBACK(TPMVERSION) drvTpmHostGetVersion(PPDMITPMCONNECTOR pInterface)
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| 196 | {
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| 197 | PDRVTPMHOST pThis = RT_FROM_MEMBER(pInterface, DRVTPMHOST, ITpmConnector);
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[91005] | 198 | return pThis->enmTpmVersion;
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[90946] | 199 | }
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| 200 |
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| 201 |
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[90996] | 202 | /** @interface_method_impl{PDMITPMCONNECTOR,pfnGetLocalityMax} */
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| 203 | static DECLCALLBACK(uint32_t) drvTpmHostGetLocalityMax(PPDMITPMCONNECTOR pInterface)
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| 204 | {
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| 205 | PDRVTPMHOST pThis = RT_FROM_MEMBER(pInterface, DRVTPMHOST, ITpmConnector);
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| 206 | return RTTpmGetLocalityMax(pThis->hTpm);
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| 207 | }
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| 208 |
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| 209 |
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[91005] | 210 | /** @interface_method_impl{PDMITPMCONNECTOR,pfnGetBufferSize} */
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| 211 | static DECLCALLBACK(uint32_t) drvTpmHostGetBufferSize(PPDMITPMCONNECTOR pInterface)
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| 212 | {
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| 213 | PDRVTPMHOST pThis = RT_FROM_MEMBER(pInterface, DRVTPMHOST, ITpmConnector);
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| 214 | return pThis->cbBuffer;
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| 215 | }
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| 216 |
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| 217 |
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[90946] | 218 | /** @interface_method_impl{PDMITPMCONNECTOR,pfnGetEstablishedFlag} */
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| 219 | static DECLCALLBACK(bool) drvTpmHostGetEstablishedFlag(PPDMITPMCONNECTOR pInterface)
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| 220 | {
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| 221 | RT_NOREF(pInterface);
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| 222 | return false;
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| 223 | }
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| 224 |
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| 225 |
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| 226 | /** @interface_method_impl{PDMITPMCONNECTOR,pfnResetEstablishedFlag} */
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| 227 | static DECLCALLBACK(int) drvTpmHostResetEstablishedFlag(PPDMITPMCONNECTOR pInterface, uint8_t bLoc)
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| 228 | {
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| 229 | RT_NOREF(pInterface, bLoc);
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| 230 | return VINF_SUCCESS;
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| 231 | }
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| 232 |
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| 233 |
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| 234 | /** @interface_method_impl{PDMITPMCONNECTOR,pfnCmdExec} */
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| 235 | static DECLCALLBACK(int) drvTpmHostCmdExec(PPDMITPMCONNECTOR pInterface, uint8_t bLoc, const void *pvCmd, size_t cbCmd, void *pvResp, size_t cbResp)
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| 236 | {
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| 237 | RT_NOREF(bLoc);
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| 238 | PDRVTPMHOST pThis = RT_FROM_MEMBER(pInterface, DRVTPMHOST, ITpmConnector);
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| 239 |
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| 240 | return RTTpmReqExec(pThis->hTpm, 0 /*bLoc*/, pvCmd, cbCmd, pvResp, cbResp, NULL /*pcbResp*/);
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| 241 | }
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| 242 |
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| 243 |
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| 244 | /** @interface_method_impl{PDMITPMCONNECTOR,pfnCmdCancel} */
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| 245 | static DECLCALLBACK(int) drvTpmHostCmdCancel(PPDMITPMCONNECTOR pInterface)
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| 246 | {
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| 247 | PDRVTPMHOST pThis = RT_FROM_MEMBER(pInterface, DRVTPMHOST, ITpmConnector);
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| 248 |
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| 249 | return RTTpmReqCancel(pThis->hTpm);
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| 250 | }
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| 251 |
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| 252 |
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| 253 | /** @interface_method_impl{PDMIBASE,pfnQueryInterface} */
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| 254 | static DECLCALLBACK(void *) drvTpmHostQueryInterface(PPDMIBASE pInterface, const char *pszIID)
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| 255 | {
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| 256 | PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
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| 257 | PDRVTPMHOST pThis = PDMINS_2_DATA(pDrvIns, PDRVTPMHOST);
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| 258 | PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
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| 259 | PDMIBASE_RETURN_INTERFACE(pszIID, PDMITPMCONNECTOR, &pThis->ITpmConnector);
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| 260 | return NULL;
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| 261 | }
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| 262 |
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| 263 |
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| 264 | /* -=-=-=-=- PDMDRVREG -=-=-=-=- */
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| 265 |
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| 266 | /** @copydoc FNPDMDRVDESTRUCT */
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| 267 | static DECLCALLBACK(void) drvTpmHostDestruct(PPDMDRVINS pDrvIns)
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| 268 | {
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| 269 | PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
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| 270 |
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| 271 | PDRVTPMHOST pThis = PDMINS_2_DATA(pDrvIns, PDRVTPMHOST);
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| 272 | LogFlow(("%s\n", __FUNCTION__));
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| 273 |
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| 274 | if (pThis->hTpm != NIL_RTTPM)
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| 275 | {
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| 276 | int rc = RTTpmClose(pThis->hTpm);
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| 277 | AssertRC(rc);
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| 278 |
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| 279 | pThis->hTpm = NIL_RTTPM;
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| 280 | }
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| 281 | }
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| 282 |
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| 283 |
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| 284 | /** @copydoc FNPDMDRVCONSTRUCT */
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| 285 | static DECLCALLBACK(int) drvTpmHostConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
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| 286 | {
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| 287 | RT_NOREF(fFlags);
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| 288 | PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
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[91867] | 289 | PDRVTPMHOST pThis = PDMINS_2_DATA(pDrvIns, PDRVTPMHOST);
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| 290 | PCPDMDRVHLPR3 pHlp = pDrvIns->pHlpR3;
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[90946] | 291 |
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| 292 | /*
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| 293 | * Init the static parts.
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| 294 | */
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| 295 | pThis->pDrvIns = pDrvIns;
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| 296 | pThis->hTpm = NIL_RTTPM;
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| 297 |
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| 298 | /* IBase */
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| 299 | pDrvIns->IBase.pfnQueryInterface = drvTpmHostQueryInterface;
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| 300 | /* ITpmConnector */
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| 301 | pThis->ITpmConnector.pfnGetVersion = drvTpmHostGetVersion;
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[90996] | 302 | pThis->ITpmConnector.pfnGetLocalityMax = drvTpmHostGetLocalityMax;
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[91005] | 303 | pThis->ITpmConnector.pfnGetBufferSize = drvTpmHostGetBufferSize;
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[90946] | 304 | pThis->ITpmConnector.pfnGetEstablishedFlag = drvTpmHostGetEstablishedFlag;
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| 305 | pThis->ITpmConnector.pfnResetEstablishedFlag = drvTpmHostResetEstablishedFlag;
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| 306 | pThis->ITpmConnector.pfnCmdExec = drvTpmHostCmdExec;
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| 307 | pThis->ITpmConnector.pfnCmdCancel = drvTpmHostCmdCancel;
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| 308 |
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| 309 | /*
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| 310 | * Validate and read the configuration.
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| 311 | */
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| 312 | PDMDRV_VALIDATE_CONFIG_RETURN(pDrvIns, "TpmId", "");
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| 313 |
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| 314 | uint32_t idTpm = RTTPM_ID_DEFAULT;
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[91867] | 315 | int rc = pHlp->pfnCFGMQueryU32Def(pCfg, "TpmId", &idTpm, RTTPM_ID_DEFAULT);
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[90946] | 316 | if (RT_FAILURE(rc))
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| 317 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
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| 318 | N_("Configuration error: querying \"TpmId\" resulted in %Rrc"), rc);
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| 319 |
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| 320 | rc = RTTpmOpen(&pThis->hTpm, idTpm);
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| 321 | if (RT_FAILURE(rc))
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| 322 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
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[91005] | 323 | N_("DrvTpmHost%d: Opening TPM with id %u failed with %Rrc"), pDrvIns->iInstance, idTpm, rc);
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[90946] | 324 |
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[91005] | 325 | RTTPMVERSION enmVersion = RTTpmGetVersion(pThis->hTpm);
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| 326 |
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| 327 | switch (enmVersion)
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| 328 | {
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| 329 | case RTTPMVERSION_1_2:
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| 330 | pThis->enmTpmVersion = TPMVERSION_1_2;
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| 331 | break;
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| 332 | case RTTPMVERSION_2_0:
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| 333 | pThis->enmTpmVersion = TPMVERSION_2_0;
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| 334 | break;
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| 335 | case RTTPMVERSION_UNKNOWN:
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| 336 | default:
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| 337 | return PDMDrvHlpVMSetError(pDrvIns, VERR_NOT_SUPPORTED, RT_SRC_POS,
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| 338 | N_("DrvTpmHost%d: TPM version %u of TPM id %u is not supported"),
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| 339 | pDrvIns->iInstance, enmVersion, idTpm);
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| 340 | }
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| 341 |
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| 342 | rc = drvTpmHostQueryBufferSize(pThis);
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| 343 | if (RT_FAILURE(rc))
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| 344 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
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[91049] | 345 | N_("DrvTpmHost%d: Querying input buffer size of TPM with id %u failed with %Rrc"),
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| 346 | pDrvIns->iInstance, idTpm, rc);
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[91005] | 347 |
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[90946] | 348 | LogRel(("DrvTpmHost#%d: Connected to TPM %u.\n", pDrvIns->iInstance, idTpm));
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| 349 | return VINF_SUCCESS;
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| 350 | }
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| 351 |
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| 352 |
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| 353 | /**
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| 354 | * TPM host driver registration record.
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| 355 | */
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| 356 | const PDMDRVREG g_DrvTpmHost =
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| 357 | {
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| 358 | /* u32Version */
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| 359 | PDM_DRVREG_VERSION,
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| 360 | /* szName */
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| 361 | "TpmHost",
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| 362 | /* szRCMod */
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| 363 | "",
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| 364 | /* szR0Mod */
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| 365 | "",
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| 366 | /* pszDescription */
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| 367 | "TPM host driver.",
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| 368 | /* fFlags */
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| 369 | PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
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| 370 | /* fClass. */
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| 371 | PDM_DRVREG_CLASS_STREAM,
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| 372 | /* cMaxInstances */
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| 373 | ~0U,
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| 374 | /* cbInstance */
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| 375 | sizeof(DRVTPMHOST),
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| 376 | /* pfnConstruct */
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| 377 | drvTpmHostConstruct,
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| 378 | /* pfnDestruct */
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| 379 | drvTpmHostDestruct,
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| 380 | /* pfnRelocate */
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| 381 | NULL,
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| 382 | /* pfnIOCtl */
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| 383 | NULL,
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| 384 | /* pfnPowerOn */
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| 385 | NULL,
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| 386 | /* pfnReset */
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| 387 | NULL,
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| 388 | /* pfnSuspend */
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| 389 | NULL,
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| 390 | /* pfnResume */
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| 391 | NULL,
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| 392 | /* pfnAttach */
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| 393 | NULL,
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| 394 | /* pfnDetach */
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| 395 | NULL,
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| 396 | /* pfnPowerOff */
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| 397 | NULL,
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| 398 | /* pfnSoftReset */
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| 399 | NULL,
|
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| 400 | /* u32EndVersion */
|
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| 401 | PDM_DRVREG_VERSION
|
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| 402 | };
|
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| 403 |
|
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