92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2015 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_TPM_HEADER
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#define GRUB_TPM_HEADER 1
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#define SHA1_DIGEST_SIZE 20
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#define TPM_BASE 0x0
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#define TPM_SUCCESS TPM_BASE
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#define TPM_AUTHFAIL (TPM_BASE + 0x1)
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#define TPM_BADINDEX (TPM_BASE + 0x2)
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#define GRUB_TPM_PCR 9
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#define GRUB_KERNEL_PCR 10
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#define GRUB_INITRD_PCR 11
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#define GRUB_CMDLINE_PCR 12
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#define TPM_TAG_RQU_COMMAND 0x00C1
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#define TPM_ORD_Extend 0x14
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#define EV_IPL 0x0d
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/* TCG_PassThroughToTPM Input Parameter Block */
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typedef struct {
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grub_uint16_t IPBLength;
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grub_uint16_t Reserved1;
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grub_uint16_t OPBLength;
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grub_uint16_t Reserved2;
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grub_uint8_t TPMOperandIn[1];
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} GRUB_PACKED PassThroughToTPM_InputParamBlock;
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/* TCG_PassThroughToTPM Output Parameter Block */
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typedef struct {
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grub_uint16_t OPBLength;
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grub_uint16_t Reserved;
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grub_uint8_t TPMOperandOut[1];
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} GRUB_PACKED PassThroughToTPM_OutputParamBlock;
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typedef struct {
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grub_uint16_t tag;
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grub_uint32_t paramSize;
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grub_uint32_t ordinal;
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grub_uint32_t pcrNum;
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grub_uint8_t inDigest[SHA1_DIGEST_SIZE]; /* The 160 bit value representing the event to be recorded. */
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} GRUB_PACKED ExtendIncoming;
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/* TPM_Extend Outgoing Operand */
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typedef struct {
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grub_uint16_t tag;
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grub_uint32_t paramSize;
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grub_uint32_t returnCode;
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grub_uint8_t outDigest[SHA1_DIGEST_SIZE]; /* The PCR value after execution of the command. */
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} GRUB_PACKED ExtendOutgoing;
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grub_err_t EXPORT_FUNC(grub_tpm_measure) (unsigned char *buf, grub_size_t size,
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grub_uint8_t pcr,
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const char *description);
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#if defined (GRUB_MACHINE_EFI) || defined (GRUB_MACHINE_PCBIOS)
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grub_err_t grub_tpm_execute(PassThroughToTPM_InputParamBlock *inbuf,
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PassThroughToTPM_OutputParamBlock *outbuf);
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grub_err_t grub_tpm_log_event(unsigned char *buf, grub_size_t size,
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grub_uint8_t pcr, const char *description);
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#else
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static inline grub_err_t grub_tpm_execute(PassThroughToTPM_InputParamBlock *inbuf,
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PassThroughToTPM_OutputParamBlock *outbuf) { return 0; };
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static inline grub_err_t grub_tpm_log_event(unsigned char *buf,
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grub_size_t size,
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grub_uint8_t pcr,
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const char *description)
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{
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return 0;
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};
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#endif
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#endif
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