/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright (c) 2018 Bootlin * Author: Miquel Raynal */ #ifndef __TPM_V2_H #define __TPM_V2_H #include #define TPM2_DIGEST_LEN 32 /** * TPM2 Structure Tags for command/response buffers. * * @TPM2_ST_NO_SESSIONS: the command does not need an authentication. * @TPM2_ST_SESSIONS: the command needs an authentication. */ enum tpm2_structures { TPM2_ST_NO_SESSIONS = 0x8001, TPM2_ST_SESSIONS = 0x8002, }; /** * TPM2 type of boolean. */ enum tpm2_yes_no { TPMI_YES = 1, TPMI_NO = 0, }; /** * TPM2 startup values. * * @TPM2_SU_CLEAR: reset the internal state. * @TPM2_SU_STATE: restore saved state (if any). */ enum tpm2_startup_types { TPM2_SU_CLEAR = 0x0000, TPM2_SU_STATE = 0x0001, }; /** * TPM2 permanent handles. * * @TPM2_RH_OWNER: refers to the 'owner' hierarchy. * @TPM2_RS_PW: indicates a password. * @TPM2_RH_LOCKOUT: refers to the 'lockout' hierarchy. * @TPM2_RH_ENDORSEMENT: refers to the 'endorsement' hierarchy. * @TPM2_RH_PLATFORM: refers to the 'platform' hierarchy. */ enum tpm2_handles { TPM2_RH_OWNER = 0x40000001, TPM2_RS_PW = 0x40000009, TPM2_RH_LOCKOUT = 0x4000000A, TPM2_RH_ENDORSEMENT = 0x4000000B, TPM2_RH_PLATFORM = 0x4000000C, }; /** * TPM2 command codes used at the beginning of a buffer, gives the command. * * @TPM2_CC_STARTUP: TPM2_Startup(). * @TPM2_CC_SELF_TEST: TPM2_SelfTest(). * @TPM2_CC_CLEAR: TPM2_Clear(). * @TPM2_CC_CLEARCONTROL: TPM2_ClearControl(). * @TPM2_CC_HIERCHANGEAUTH: TPM2_HierarchyChangeAuth(). * @TPM2_CC_PCR_SETAUTHPOL: TPM2_PCR_SetAuthPolicy(). * @TPM2_CC_DAM_RESET: TPM2_DictionaryAttackLockReset(). * @TPM2_CC_DAM_PARAMETERS: TPM2_DictionaryAttackParameters(). * @TPM2_CC_GET_CAPABILITY: TPM2_GetCapibility(). * @TPM2_CC_PCR_READ: TPM2_PCR_Read(). * @TPM2_CC_PCR_EXTEND: TPM2_PCR_Extend(). * @TPM2_CC_PCR_SETAUTHVAL: TPM2_PCR_SetAuthValue(). */ enum tpm2_command_codes { TPM2_CC_STARTUP = 0x0144, TPM2_CC_SELF_TEST = 0x0143, TPM2_CC_CLEAR = 0x0126, TPM2_CC_CLEARCONTROL = 0x0127, TPM2_CC_HIERCHANGEAUTH = 0x0129, TPM2_CC_PCR_SETAUTHPOL = 0x012C, TPM2_CC_DAM_RESET = 0x0139, TPM2_CC_DAM_PARAMETERS = 0x013A, TPM2_CC_NV_READ = 0x014E, TPM2_CC_GET_CAPABILITY = 0x017A, TPM2_CC_PCR_READ = 0x017E, TPM2_CC_PCR_EXTEND = 0x0182, TPM2_CC_PCR_SETAUTHVAL = 0x0183, }; /** * TPM2 return codes. */ enum tpm2_return_codes { TPM2_RC_SUCCESS = 0x0000, TPM2_RC_BAD_TAG = 0x001E, TPM2_RC_FMT1 = 0x0080, TPM2_RC_HASH = TPM2_RC_FMT1 + 0x0003, TPM2_RC_VALUE = TPM2_RC_FMT1 + 0x0004, TPM2_RC_SIZE = TPM2_RC_FMT1 + 0x0015, TPM2_RC_BAD_AUTH = TPM2_RC_FMT1 + 0x0022, TPM2_RC_HANDLE = TPM2_RC_FMT1 + 0x000B, TPM2_RC_VER1 = 0x0100, TPM2_RC_INITIALIZE = TPM2_RC_VER1 + 0x0000, TPM2_RC_FAILURE = TPM2_RC_VER1 + 0x0001, TPM2_RC_DISABLED = TPM2_RC_VER1 + 0x0020, TPM2_RC_AUTH_MISSING = TPM2_RC_VER1 + 0x0025, TPM2_RC_COMMAND_CODE = TPM2_RC_VER1 + 0x0043, TPM2_RC_AUTHSIZE = TPM2_RC_VER1 + 0x0044, TPM2_RC_AUTH_CONTEXT = TPM2_RC_VER1 + 0x0045, TPM2_RC_NEEDS_TEST = TPM2_RC_VER1 + 0x0053, TPM2_RC_WARN = 0x0900, TPM2_RC_TESTING = TPM2_RC_WARN + 0x000A, TPM2_RC_REFERENCE_H0 = TPM2_RC_WARN + 0x0010, TPM2_RC_LOCKOUT = TPM2_RC_WARN + 0x0021, }; /** * TPM2 algorithms. */ enum tpm2_algorithms { TPM2_ALG_XOR = 0x0A, TPM2_ALG_SHA256 = 0x0B, TPM2_ALG_SHA384 = 0x0C, TPM2_ALG_SHA512 = 0x0D, TPM2_ALG_NULL = 0x10, }; /* NV index attributes */ enum tpm_index_attrs { TPMA_NV_PPWRITE = 1UL << 0, TPMA_NV_OWNERWRITE = 1UL << 1, TPMA_NV_AUTHWRITE = 1UL << 2, TPMA_NV_POLICYWRITE = 1UL << 3, TPMA_NV_COUNTER = 1UL << 4, TPMA_NV_BITS = 1UL << 5, TPMA_NV_EXTEND = 1UL << 6, TPMA_NV_POLICY_DELETE = 1UL << 10, TPMA_NV_WRITELOCKED = 1UL << 11, TPMA_NV_WRITEALL = 1UL << 12, TPMA_NV_WRITEDEFINE = 1UL << 13, TPMA_NV_WRITE_STCLEAR = 1UL << 14, TPMA_NV_GLOBALLOCK = 1UL << 15, TPMA_NV_PPREAD = 1UL << 16, TPMA_NV_OWNERREAD = 1UL << 17, TPMA_NV_AUTHREAD = 1UL << 18, TPMA_NV_POLICYREAD = 1UL << 19, TPMA_NV_NO_DA = 1UL << 25, TPMA_NV_ORDERLY = 1UL << 26, TPMA_NV_CLEAR_STCLEAR = 1UL << 27, TPMA_NV_READLOCKED = 1UL << 28, TPMA_NV_WRITTEN = 1UL << 29, TPMA_NV_PLATFORMCREATE = 1UL << 30, TPMA_NV_READ_STCLEAR = 1UL << 31, TPMA_NV_MASK_READ = TPMA_NV_PPREAD | TPMA_NV_OWNERREAD | TPMA_NV_AUTHREAD | TPMA_NV_POLICYREAD, TPMA_NV_MASK_WRITE = TPMA_NV_PPWRITE | TPMA_NV_OWNERWRITE | TPMA_NV_AUTHWRITE | TPMA_NV_POLICYWRITE, }; /** * Issue a TPM2_Startup command. * * @dev TPM device * @mode TPM startup mode * * @return code of the operation */ u32 tpm2_startup(struct udevice *dev, enum tpm2_startup_types mode); /** * Issue a TPM2_SelfTest command. * * @dev TPM device * @full_test Asking to perform all tests or only the untested ones * * @return code of the operation */ u32 tpm2_self_test(struct udevice *dev, enum tpm2_yes_no full_test); /** * Issue a TPM2_Clear command. * * @dev TPM device * @handle Handle * @pw Password * @pw_sz Length of the password * * @return code of the operation */ u32 tpm2_clear(struct udevice *dev, u32 handle, const char *pw, const ssize_t pw_sz); /** * Issue a TPM2_PCR_Extend command. * * @dev TPM device * @index Index of the PCR * @digest Value representing the event to be recorded * * @return code of the operation */ u32 tpm2_pcr_extend(struct udevice *dev, u32 index, const uint8_t *digest); /** * Issue a TPM2_PCR_Read command. * * @dev TPM device * @idx Index of the PCR * @idx_min_sz Minimum size in bytes of the pcrSelect array * @data Output buffer for contents of the named PCR * @updates Optional out parameter: number of updates for this PCR * * @return code of the operation */ u32 tpm2_pcr_read(struct udevice *dev, u32 idx, unsigned int idx_min_sz, void *data, unsigned int *updates); /** * Issue a TPM2_GetCapability command. This implementation is limited * to query property index that is 4-byte wide. * * @dev TPM device * @capability Partition of capabilities * @property Further definition of capability, limited to be 4 bytes wide * @buf Output buffer for capability information * @prop_count Size of output buffer * * @return code of the operation */ u32 tpm2_get_capability(struct udevice *dev, u32 capability, u32 property, void *buf, size_t prop_count); /** * Issue a TPM2_DictionaryAttackLockReset command. * * @dev TPM device * @pw Password * @pw_sz Length of the password * * @return code of the operation */ u32 tpm2_dam_reset(struct udevice *dev, const char *pw, const ssize_t pw_sz); /** * Issue a TPM2_DictionaryAttackParameters command. * * @dev TPM device * @pw Password * @pw_sz Length of the password * @max_tries Count of authorizations before lockout * @recovery_time Time before decrementation of the failure count * @lockout_recovery Time to wait after a lockout * * @return code of the operation */ u32 tpm2_dam_parameters(struct udevice *dev, const char *pw, const ssize_t pw_sz, unsigned int max_tries, unsigned int recovery_time, unsigned int lockout_recovery); /** * Issue a TPM2_HierarchyChangeAuth command. * * @dev TPM device * @handle Handle * @newpw New password * @newpw_sz Length of the new password * @oldpw Old password * @oldpw_sz Length of the old password * * @return code of the operation */ int tpm2_change_auth(struct udevice *dev, u32 handle, const char *newpw, const ssize_t newpw_sz, const char *oldpw, const ssize_t oldpw_sz); /** * Issue a TPM_PCR_SetAuthPolicy command. * * @dev TPM device * @pw Platform password * @pw_sz Length of the password * @index Index of the PCR * @digest New key to access the PCR * * @return code of the operation */ u32 tpm2_pcr_setauthpolicy(struct udevice *dev, const char *pw, const ssize_t pw_sz, u32 index, const char *key); /** * Issue a TPM_PCR_SetAuthValue command. * * @dev TPM device * @pw Platform password * @pw_sz Length of the password * @index Index of the PCR * @digest New key to access the PCR * @key_sz Length of the new key * * @return code of the operation */ u32 tpm2_pcr_setauthvalue(struct udevice *dev, const char *pw, const ssize_t pw_sz, u32 index, const char *key, const ssize_t key_sz); #endif /* __TPM_V2_H */