include/tpm-v2.h - u-boot-mtk - Git at Google

 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2018 Bootlin
  * Author: Miquel Raynal <miquel.raynal@bootlin.com>
  */

 #ifndef __TPM_V2_H
 #define __TPM_V2_H

 #include <tpm-common.h>

 #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 */
	/* SPDX-License-Identifier: GPL-2.0+ */
	/*
	* Copyright (c) 2018 Bootlin
	* Author: Miquel Raynal <miquel.raynal@bootlin.com>
	*/

	#ifndef __TPM_V2_H
	#define __TPM_V2_H

	#include <tpm-common.h>

	#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 */