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1259f778c9
TPM_NV_PER_PPREAD: physical presence needed for reading TPM_NV_PER_WRITEDEFINE: persistent write lock by writing size 0 TPM_NV_PER_WRITEALL: write in one go Signed-off-by: André Draszik <adraszik@tycoint.com> Acked-by: Simon Glass <sjg@chromium.org>
669 lines
20 KiB
C
669 lines
20 KiB
C
/*
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* Copyright (c) 2013 The Chromium OS Authors.
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* Coypright (c) 2013 Guntermann & Drunck GmbH
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __TPM_H
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#define __TPM_H
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/*
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* Here is a partial implementation of TPM commands. Please consult TCG Main
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* Specification for definitions of TPM commands.
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*/
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#define TPM_HEADER_SIZE 10
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enum tpm_duration {
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TPM_SHORT = 0,
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TPM_MEDIUM = 1,
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TPM_LONG = 2,
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TPM_UNDEFINED,
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TPM_DURATION_COUNT,
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};
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enum tpm_startup_type {
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TPM_ST_CLEAR = 0x0001,
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TPM_ST_STATE = 0x0002,
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TPM_ST_DEACTIVATED = 0x0003,
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};
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enum tpm_physical_presence {
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TPM_PHYSICAL_PRESENCE_HW_DISABLE = 0x0200,
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TPM_PHYSICAL_PRESENCE_CMD_DISABLE = 0x0100,
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TPM_PHYSICAL_PRESENCE_LIFETIME_LOCK = 0x0080,
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TPM_PHYSICAL_PRESENCE_HW_ENABLE = 0x0040,
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TPM_PHYSICAL_PRESENCE_CMD_ENABLE = 0x0020,
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TPM_PHYSICAL_PRESENCE_NOTPRESENT = 0x0010,
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TPM_PHYSICAL_PRESENCE_PRESENT = 0x0008,
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TPM_PHYSICAL_PRESENCE_LOCK = 0x0004,
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};
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enum tpm_nv_index {
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TPM_NV_INDEX_LOCK = 0xffffffff,
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TPM_NV_INDEX_0 = 0x00000000,
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TPM_NV_INDEX_DIR = 0x10000001,
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};
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enum tpm_resource_type {
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TPM_RT_KEY = 0x00000001,
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TPM_RT_AUTH = 0x00000002,
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TPM_RT_HASH = 0x00000003,
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TPM_RT_TRANS = 0x00000004,
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TPM_RT_CONTEXT = 0x00000005,
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TPM_RT_COUNTER = 0x00000006,
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TPM_RT_DELEGATE = 0x00000007,
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TPM_RT_DAA_TPM = 0x00000008,
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TPM_RT_DAA_V0 = 0x00000009,
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TPM_RT_DAA_V1 = 0x0000000A,
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};
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enum tpm_capability_areas {
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TPM_CAP_ORD = 0x00000001,
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TPM_CAP_ALG = 0x00000002,
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TPM_CAP_PID = 0x00000003,
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TPM_CAP_FLAG = 0x00000004,
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TPM_CAP_PROPERTY = 0x00000005,
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TPM_CAP_VERSION = 0x00000006,
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TPM_CAP_KEY_HANDLE = 0x00000007,
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TPM_CAP_CHECK_LOADED = 0x00000008,
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TPM_CAP_SYM_MODE = 0x00000009,
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TPM_CAP_KEY_STATUS = 0x0000000C,
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TPM_CAP_NV_LIST = 0x0000000D,
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TPM_CAP_MFR = 0x00000010,
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TPM_CAP_NV_INDEX = 0x00000011,
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TPM_CAP_TRANS_ALG = 0x00000012,
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TPM_CAP_HANDLE = 0x00000014,
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TPM_CAP_TRANS_ES = 0x00000015,
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TPM_CAP_AUTH_ENCRYPT = 0x00000017,
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TPM_CAP_SELECT_SIZE = 0x00000018,
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TPM_CAP_DA_LOGIC = 0x00000019,
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TPM_CAP_VERSION_VAL = 0x0000001A,
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};
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#define TPM_NV_PER_GLOBALLOCK (1U << 15)
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#define TPM_NV_PER_PPREAD (1U << 16)
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#define TPM_NV_PER_PPWRITE (1U << 0)
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#define TPM_NV_PER_READ_STCLEAR (1U << 31)
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#define TPM_NV_PER_WRITE_STCLEAR (1U << 14)
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#define TPM_NV_PER_WRITEDEFINE (1U << 13)
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#define TPM_NV_PER_WRITEALL (1U << 12)
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enum {
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TPM_PUBEK_SIZE = 256,
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};
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/**
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* TPM return codes as defined in the TCG Main specification
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* (TPM Main Part 2 Structures; Specification version 1.2)
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*/
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enum tpm_return_code {
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TPM_BASE = 0x00000000,
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TPM_NON_FATAL = 0x00000800,
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TPM_SUCCESS = TPM_BASE,
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/* TPM-defined fatal error codes */
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TPM_AUTHFAIL = TPM_BASE + 1,
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TPM_BADINDEX = TPM_BASE + 2,
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TPM_BAD_PARAMETER = TPM_BASE + 3,
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TPM_AUDITFAILURE = TPM_BASE + 4,
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TPM_CLEAR_DISABLED = TPM_BASE + 5,
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TPM_DEACTIVATED = TPM_BASE + 6,
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TPM_DISABLED = TPM_BASE + 7,
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TPM_DISABLED_CMD = TPM_BASE + 8,
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TPM_FAIL = TPM_BASE + 9,
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TPM_BAD_ORDINAL = TPM_BASE + 10,
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TPM_INSTALL_DISABLED = TPM_BASE + 11,
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TPM_INVALID_KEYHANDLE = TPM_BASE + 12,
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TPM_KEYNOTFOUND = TPM_BASE + 13,
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TPM_INAPPROPRIATE_ENC = TPM_BASE + 14,
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TPM_MIGRATE_FAIL = TPM_BASE + 15,
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TPM_INVALID_PCR_INFO = TPM_BASE + 16,
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TPM_NOSPACE = TPM_BASE + 17,
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TPM_NOSRK = TPM_BASE + 18,
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TPM_NOTSEALED_BLOB = TPM_BASE + 19,
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TPM_OWNER_SET = TPM_BASE + 20,
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TPM_RESOURCES = TPM_BASE + 21,
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TPM_SHORTRANDOM = TPM_BASE + 22,
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TPM_SIZE = TPM_BASE + 23,
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TPM_WRONGPCRVAL = TPM_BASE + 24,
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TPM_BAD_PARAM_SIZE = TPM_BASE + 25,
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TPM_SHA_THREAD = TPM_BASE + 26,
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TPM_SHA_ERROR = TPM_BASE + 27,
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TPM_FAILEDSELFTEST = TPM_BASE + 28,
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TPM_AUTH2FAIL = TPM_BASE + 29,
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TPM_BADTAG = TPM_BASE + 30,
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TPM_IOERROR = TPM_BASE + 31,
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TPM_ENCRYPT_ERROR = TPM_BASE + 32,
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TPM_DECRYPT_ERROR = TPM_BASE + 33,
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TPM_INVALID_AUTHHANDLE = TPM_BASE + 34,
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TPM_NO_ENDORSEMENT = TPM_BASE + 35,
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TPM_INVALID_KEYUSAGE = TPM_BASE + 36,
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TPM_WRONG_ENTITYTYPE = TPM_BASE + 37,
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TPM_INVALID_POSTINIT = TPM_BASE + 38,
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TPM_INAPPROPRIATE_SIG = TPM_BASE + 39,
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TPM_BAD_KEY_PROPERTY = TPM_BASE + 40,
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TPM_BAD_MIGRATION = TPM_BASE + 41,
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TPM_BAD_SCHEME = TPM_BASE + 42,
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TPM_BAD_DATASIZE = TPM_BASE + 43,
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TPM_BAD_MODE = TPM_BASE + 44,
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TPM_BAD_PRESENCE = TPM_BASE + 45,
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TPM_BAD_VERSION = TPM_BASE + 46,
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TPM_NO_WRAP_TRANSPORT = TPM_BASE + 47,
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TPM_AUDITFAIL_UNSUCCESSFUL = TPM_BASE + 48,
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TPM_AUDITFAIL_SUCCESSFUL = TPM_BASE + 49,
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TPM_NOTRESETABLE = TPM_BASE + 50,
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TPM_NOTLOCAL = TPM_BASE + 51,
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TPM_BAD_TYPE = TPM_BASE + 52,
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TPM_INVALID_RESOURCE = TPM_BASE + 53,
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TPM_NOTFIPS = TPM_BASE + 54,
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TPM_INVALID_FAMILY = TPM_BASE + 55,
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TPM_NO_NV_PERMISSION = TPM_BASE + 56,
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TPM_REQUIRES_SIGN = TPM_BASE + 57,
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TPM_KEY_NOTSUPPORTED = TPM_BASE + 58,
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TPM_AUTH_CONFLICT = TPM_BASE + 59,
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TPM_AREA_LOCKED = TPM_BASE + 60,
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TPM_BAD_LOCALITY = TPM_BASE + 61,
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TPM_READ_ONLY = TPM_BASE + 62,
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TPM_PER_NOWRITE = TPM_BASE + 63,
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TPM_FAMILY_COUNT = TPM_BASE + 64,
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TPM_WRITE_LOCKED = TPM_BASE + 65,
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TPM_BAD_ATTRIBUTES = TPM_BASE + 66,
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TPM_INVALID_STRUCTURE = TPM_BASE + 67,
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TPM_KEY_OWNER_CONTROL = TPM_BASE + 68,
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TPM_BAD_COUNTER = TPM_BASE + 69,
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TPM_NOT_FULLWRITE = TPM_BASE + 70,
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TPM_CONTEXT_GAP = TPM_BASE + 71,
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TPM_MAXNVWRITES = TPM_BASE + 72,
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TPM_NOOPERATOR = TPM_BASE + 73,
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TPM_RESOURCEMISSING = TPM_BASE + 74,
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TPM_DELEGATE_LOCK = TPM_BASE + 75,
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TPM_DELEGATE_FAMILY = TPM_BASE + 76,
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TPM_DELEGATE_ADMIN = TPM_BASE + 77,
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TPM_TRANSPORT_NOTEXCLUSIVE = TPM_BASE + 78,
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TPM_OWNER_CONTROL = TPM_BASE + 79,
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TPM_DAA_RESOURCES = TPM_BASE + 80,
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TPM_DAA_INPUT_DATA0 = TPM_BASE + 81,
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TPM_DAA_INPUT_DATA1 = TPM_BASE + 82,
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TPM_DAA_ISSUER_SETTINGS = TPM_BASE + 83,
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TPM_DAA_TPM_SETTINGS = TPM_BASE + 84,
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TPM_DAA_STAGE = TPM_BASE + 85,
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TPM_DAA_ISSUER_VALIDITY = TPM_BASE + 86,
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TPM_DAA_WRONG_W = TPM_BASE + 87,
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TPM_BAD_HANDLE = TPM_BASE + 88,
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TPM_BAD_DELEGATE = TPM_BASE + 89,
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TPM_BADCONTEXT = TPM_BASE + 90,
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TPM_TOOMANYCONTEXTS = TPM_BASE + 91,
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TPM_MA_TICKET_SIGNATURE = TPM_BASE + 92,
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TPM_MA_DESTINATION = TPM_BASE + 93,
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TPM_MA_SOURCE = TPM_BASE + 94,
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TPM_MA_AUTHORITY = TPM_BASE + 95,
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TPM_PERMANENTEK = TPM_BASE + 97,
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TPM_BAD_SIGNATURE = TPM_BASE + 98,
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TPM_NOCONTEXTSPACE = TPM_BASE + 99,
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/* TPM-defined non-fatal errors */
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TPM_RETRY = TPM_BASE + TPM_NON_FATAL,
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TPM_NEEDS_SELFTEST = TPM_BASE + TPM_NON_FATAL + 1,
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TPM_DOING_SELFTEST = TPM_BASE + TPM_NON_FATAL + 2,
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TPM_DEFEND_LOCK_RUNNING = TPM_BASE + TPM_NON_FATAL + 3,
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};
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struct tpm_permanent_flags {
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__be16 tag;
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u8 disable;
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u8 ownership;
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u8 deactivated;
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u8 read_pubek;
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u8 disable_owner_clear;
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u8 allow_maintenance;
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u8 physical_presence_lifetime_lock;
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u8 physical_presence_hw_enable;
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u8 physical_presence_cmd_enable;
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u8 cekp_used;
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u8 tpm_post;
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u8 tpm_post_lock;
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u8 fips;
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u8 operator;
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u8 enable_revoke_ek;
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u8 nv_locked;
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u8 read_srk_pub;
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u8 tpm_established;
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u8 maintenance_done;
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u8 disable_full_da_logic_info;
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} __packed;
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/* Max buffer size supported by our tpm */
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#define TPM_DEV_BUFSIZE 1260
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/**
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* struct tpm_chip_priv - Information about a TPM, stored by the uclass
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*
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* These values must be set up by the device's probe() method before
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* communcation is attempted. If the device has an xfer() method, this is
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* not needed. There is no need to set up @buf.
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*
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* @duration_ms: Length of each duration type in milliseconds
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* @retry_time_ms: Time to wait before retrying receive
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*/
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struct tpm_chip_priv {
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uint duration_ms[TPM_DURATION_COUNT];
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uint retry_time_ms;
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u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */
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};
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/**
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* struct tpm_ops - low-level TPM operations
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*
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* These are designed to avoid loops and delays in the driver itself. These
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* should be handled in the uclass.
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*
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* In gneral you should implement everything except xfer(). Where you need
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* complete control of the transfer, then xfer() can be provided and will
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* override the other methods.
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*
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* This interface is for low-level TPM access. It does not understand the
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* concept of localities or the various TPM messages. That interface is
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* defined in the functions later on in this file, but they all translate
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* to bytes which are sent and received.
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*/
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struct tpm_ops {
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/**
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* open() - Request access to locality 0 for the caller
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*
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* After all commands have been completed the caller should call
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* close().
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*
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* @dev: Device to close
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* @return 0 ok OK, -ve on error
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*/
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int (*open)(struct udevice *dev);
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/**
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* close() - Close the current session
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*
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* Releasing the locked locality. Returns 0 on success, -ve 1 on
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* failure (in case lock removal did not succeed).
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*
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* @dev: Device to close
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* @return 0 ok OK, -ve on error
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*/
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int (*close)(struct udevice *dev);
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/**
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* get_desc() - Get a text description of the TPM
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*
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* @dev: Device to check
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* @buf: Buffer to put the string
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* @size: Maximum size of buffer
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* @return length of string, or -ENOSPC it no space
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*/
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int (*get_desc)(struct udevice *dev, char *buf, int size);
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/**
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* send() - send data to the TPM
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*
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* @dev: Device to talk to
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* @sendbuf: Buffer of the data to send
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* @send_size: Size of the data to send
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*
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* Returns 0 on success or -ve on failure.
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*/
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int (*send)(struct udevice *dev, const uint8_t *sendbuf,
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size_t send_size);
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/**
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* recv() - receive a response from the TPM
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*
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* @dev: Device to talk to
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* @recvbuf: Buffer to save the response to
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* @max_size: Maximum number of bytes to receive
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*
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* Returns number of bytes received on success, -EAGAIN if the TPM
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* response is not ready, -EINTR if cancelled, or other -ve value on
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* failure.
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*/
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int (*recv)(struct udevice *dev, uint8_t *recvbuf, size_t max_size);
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/**
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* cleanup() - clean up after an operation in progress
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*
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* This is called if receiving times out. The TPM may need to abort
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* the current transaction if it did not complete, and make itself
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* ready for another.
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*
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* @dev: Device to talk to
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*/
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int (*cleanup)(struct udevice *dev);
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/**
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* xfer() - send data to the TPM and get response
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*
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* This method is optional. If it exists it is used in preference
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* to send(), recv() and cleanup(). It should handle all aspects of
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* TPM communication for a single transfer.
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*
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* @dev: Device to talk to
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* @sendbuf: Buffer of the data to send
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* @send_size: Size of the data to send
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* @recvbuf: Buffer to save the response to
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* @recv_size: Pointer to the size of the response buffer
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*
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* Returns 0 on success (and places the number of response bytes at
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* recv_size) or -ve on failure.
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*/
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int (*xfer)(struct udevice *dev, const uint8_t *sendbuf,
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size_t send_size, uint8_t *recvbuf, size_t *recv_size);
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};
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#define tpm_get_ops(dev) ((struct tpm_ops *)device_get_ops(dev))
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/**
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* tpm_open() - Request access to locality 0 for the caller
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*
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* After all commands have been completed the caller is supposed to
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* call tpm_close().
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*
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* Returns 0 on success, -ve on failure.
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*/
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int tpm_open(struct udevice *dev);
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/**
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* tpm_close() - Close the current session
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*
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* Releasing the locked locality. Returns 0 on success, -ve 1 on
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* failure (in case lock removal did not succeed).
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*/
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int tpm_close(struct udevice *dev);
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/**
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* tpm_get_desc() - Get a text description of the TPM
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*
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* @dev: Device to check
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* @buf: Buffer to put the string
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* @size: Maximum size of buffer
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* @return length of string, or -ENOSPC it no space
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*/
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int tpm_get_desc(struct udevice *dev, char *buf, int size);
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/**
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* tpm_xfer() - send data to the TPM and get response
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*
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* This first uses the device's send() method to send the bytes. Then it calls
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* recv() to get the reply. If recv() returns -EAGAIN then it will delay a
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* short time and then call recv() again.
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*
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* Regardless of whether recv() completes successfully, it will then call
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* cleanup() to finish the transaction.
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*
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* Note that the outgoing data is inspected to determine command type
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* (ordinal) and a timeout is used for that command type.
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*
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* @sendbuf - buffer of the data to send
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* @send_size size of the data to send
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* @recvbuf - memory to save the response to
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* @recv_len - pointer to the size of the response buffer
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*
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* Returns 0 on success (and places the number of response bytes at
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* recv_len) or -ve on failure.
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*/
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int tpm_xfer(struct udevice *dev, const uint8_t *sendbuf, size_t send_size,
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uint8_t *recvbuf, size_t *recv_size);
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/**
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* Initialize TPM device. It must be called before any TPM commands.
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*
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* @return 0 on success, non-0 on error.
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*/
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int tpm_init(void);
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/**
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* Issue a TPM_Startup command.
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*
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* @param mode TPM startup mode
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* @return return code of the operation
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*/
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uint32_t tpm_startup(enum tpm_startup_type mode);
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/**
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* Issue a TPM_SelfTestFull command.
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*
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* @return return code of the operation
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*/
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uint32_t tpm_self_test_full(void);
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/**
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* Issue a TPM_ContinueSelfTest command.
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*
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* @return return code of the operation
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*/
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uint32_t tpm_continue_self_test(void);
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/**
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* Issue a TPM_NV_DefineSpace command. The implementation is limited
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* to specify TPM_NV_ATTRIBUTES and size of the area. The area index
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* could be one of the special value listed in enum tpm_nv_index.
|
|
*
|
|
* @param index index of the area
|
|
* @param perm TPM_NV_ATTRIBUTES of the area
|
|
* @param size size of the area
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_nv_define_space(uint32_t index, uint32_t perm, uint32_t size);
|
|
|
|
/**
|
|
* Issue a TPM_NV_ReadValue command. This implementation is limited
|
|
* to read the area from offset 0. The area index could be one of
|
|
* the special value listed in enum tpm_nv_index.
|
|
*
|
|
* @param index index of the area
|
|
* @param data output buffer of the area contents
|
|
* @param count size of output buffer
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_nv_read_value(uint32_t index, void *data, uint32_t count);
|
|
|
|
/**
|
|
* Issue a TPM_NV_WriteValue command. This implementation is limited
|
|
* to write the area from offset 0. The area index could be one of
|
|
* the special value listed in enum tpm_nv_index.
|
|
*
|
|
* @param index index of the area
|
|
* @param data input buffer to be wrote to the area
|
|
* @param length length of data bytes of input buffer
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_nv_write_value(uint32_t index, const void *data, uint32_t length);
|
|
|
|
/**
|
|
* Issue a TPM_Extend command.
|
|
*
|
|
* @param index index of the PCR
|
|
* @param in_digest 160-bit value representing the event to be
|
|
* recorded
|
|
* @param out_digest 160-bit PCR value after execution of the
|
|
* command
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_extend(uint32_t index, const void *in_digest, void *out_digest);
|
|
|
|
/**
|
|
* Issue a TPM_PCRRead command.
|
|
*
|
|
* @param index index of the PCR
|
|
* @param data output buffer for contents of the named PCR
|
|
* @param count size of output buffer
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_pcr_read(uint32_t index, void *data, size_t count);
|
|
|
|
/**
|
|
* Issue a TSC_PhysicalPresence command. TPM physical presence flag
|
|
* is bit-wise OR'ed of flags listed in enum tpm_physical_presence.
|
|
*
|
|
* @param presence TPM physical presence flag
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_tsc_physical_presence(uint16_t presence);
|
|
|
|
/**
|
|
* Issue a TPM_ReadPubek command.
|
|
*
|
|
* @param data output buffer for the public endorsement key
|
|
* @param count size of ouput buffer
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_read_pubek(void *data, size_t count);
|
|
|
|
/**
|
|
* Issue a TPM_ForceClear command.
|
|
*
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_force_clear(void);
|
|
|
|
/**
|
|
* Issue a TPM_PhysicalEnable command.
|
|
*
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_physical_enable(void);
|
|
|
|
/**
|
|
* Issue a TPM_PhysicalDisable command.
|
|
*
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_physical_disable(void);
|
|
|
|
/**
|
|
* Issue a TPM_PhysicalSetDeactivated command.
|
|
*
|
|
* @param state boolean state of the deactivated flag
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_physical_set_deactivated(uint8_t state);
|
|
|
|
/**
|
|
* Issue a TPM_GetCapability command. This implementation is limited
|
|
* to query sub_cap index that is 4-byte wide.
|
|
*
|
|
* @param cap_area partition of capabilities
|
|
* @param sub_cap further definition of capability, which is
|
|
* limited to be 4-byte wide
|
|
* @param cap output buffer for capability information
|
|
* @param count size of ouput buffer
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_get_capability(uint32_t cap_area, uint32_t sub_cap,
|
|
void *cap, size_t count);
|
|
|
|
/**
|
|
* Issue a TPM_FlushSpecific command for a AUTH ressource.
|
|
*
|
|
* @param auth_handle handle of the auth session
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_terminate_auth_session(uint32_t auth_handle);
|
|
|
|
/**
|
|
* Issue a TPM_OIAP command to setup an object independant authorization
|
|
* session.
|
|
* Information about the session is stored internally.
|
|
* If there was already an OIAP session active it is terminated and a new
|
|
* session is set up.
|
|
*
|
|
* @param auth_handle pointer to the (new) auth handle or NULL.
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_oiap(uint32_t *auth_handle);
|
|
|
|
/**
|
|
* Ends an active OIAP session.
|
|
*
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_end_oiap(void);
|
|
|
|
/**
|
|
* Issue a TPM_LoadKey2 (Auth1) command using an OIAP session for authenticating
|
|
* the usage of the parent key.
|
|
*
|
|
* @param parent_handle handle of the parent key.
|
|
* @param key pointer to the key structure (TPM_KEY or TPM_KEY12).
|
|
* @param key_length size of the key structure
|
|
* @param parent_key_usage_auth usage auth for the parent key
|
|
* @param key_handle pointer to the key handle
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_load_key2_oiap(uint32_t parent_handle,
|
|
const void *key, size_t key_length,
|
|
const void *parent_key_usage_auth,
|
|
uint32_t *key_handle);
|
|
|
|
/**
|
|
* Issue a TPM_GetPubKey (Auth1) command using an OIAP session for
|
|
* authenticating the usage of the key.
|
|
*
|
|
* @param key_handle handle of the key
|
|
* @param usage_auth usage auth for the key
|
|
* @param pubkey pointer to the pub key buffer; may be NULL if the pubkey
|
|
* should not be stored.
|
|
* @param pubkey_len pointer to the pub key buffer len. On entry: the size of
|
|
* the provided pubkey buffer. On successful exit: the size
|
|
* of the stored TPM_PUBKEY structure (iff pubkey != NULL).
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_get_pub_key_oiap(uint32_t key_handle, const void *usage_auth,
|
|
void *pubkey, size_t *pubkey_len);
|
|
|
|
/**
|
|
* Get the TPM permanent flags value
|
|
*
|
|
* @param pflags Place to put permanent flags
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_get_permanent_flags(struct tpm_permanent_flags *pflags);
|
|
|
|
/**
|
|
* Get the TPM permissions
|
|
*
|
|
* @param perm Returns permissions value
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_get_permissions(uint32_t index, uint32_t *perm);
|
|
|
|
/**
|
|
* Flush a resource with a given handle and type from the TPM
|
|
*
|
|
* @param key_handle handle of the resource
|
|
* @param resource_type type of the resource
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_flush_specific(uint32_t key_handle, uint32_t resource_type);
|
|
|
|
#ifdef CONFIG_TPM_LOAD_KEY_BY_SHA1
|
|
/**
|
|
* Search for a key by usage AuthData and the hash of the parent's pub key.
|
|
*
|
|
* @param auth Usage auth of the key to search for
|
|
* @param pubkey_digest SHA1 hash of the pub key structure of the key
|
|
* @param[out] handle The handle of the key (Non-null iff found)
|
|
* @return 0 if key was found in TPM; != 0 if not.
|
|
*/
|
|
uint32_t tpm_find_key_sha1(const uint8_t auth[20], const uint8_t
|
|
pubkey_digest[20], uint32_t *handle);
|
|
#endif /* CONFIG_TPM_LOAD_KEY_BY_SHA1 */
|
|
|
|
/**
|
|
* Read random bytes from the TPM RNG. The implementation deals with the fact
|
|
* that the TPM may legally return fewer bytes than requested by retrying
|
|
* until @p count bytes have been received.
|
|
*
|
|
* @param data output buffer for the random bytes
|
|
* @param count size of output buffer
|
|
* @return return code of the operation
|
|
*/
|
|
uint32_t tpm_get_random(void *data, uint32_t count);
|
|
|
|
#endif /* __TPM_H */
|