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/* 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,
};
/**
* Issue a TPM2_Startup command.
*
* @mode TPM startup mode
*
* @return code of the operation
*/
u32 tpm2_startup(enum tpm2_startup_types mode);
/**
* Issue a TPM2_SelfTest command.
*
* @full_test Asking to perform all tests or only the untested ones
*
* @return code of the operation
*/
u32 tpm2_self_test(enum tpm2_yes_no full_test);
/**
* Issue a TPM2_Clear command.
*
* @handle Handle
* @pw Password
* @pw_sz Length of the password
*
* @return code of the operation
*/
u32 tpm2_clear(u32 handle, const char *pw, const ssize_t pw_sz);
/**
* Issue a TPM2_PCR_Extend command.
*
* @index Index of the PCR
* @digest Value representing the event to be recorded
*
* @return code of the operation
*/
u32 tpm2_pcr_extend(u32 index, const uint8_t *digest);
/**
* Issue a TPM2_PCR_Read command.
*
* @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(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.
*
* @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(u32 capability, u32 property, void *buf,
size_t prop_count);
/**
* Issue a TPM2_DictionaryAttackLockReset command.
*
* @pw Password
* @pw_sz Length of the password
*
* @return code of the operation
*/
u32 tpm2_dam_reset(const char *pw, const ssize_t pw_sz);
/**
* Issue a TPM2_DictionaryAttackParameters command.
*
* @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(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.
*
* @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(u32 handle, const char *newpw, const ssize_t newpw_sz,
const char *oldpw, const ssize_t oldpw_sz);
/**
* Issue a TPM_PCR_SetAuthPolicy command.
*
* @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(const char *pw, const ssize_t pw_sz, u32 index,
const char *key);
/**
* Issue a TPM_PCR_SetAuthValue command.
*
* @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(const char *pw, const ssize_t pw_sz, u32 index,
const char *key, const ssize_t key_sz);
#endif /* __TPM_V2_H */
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