firmware/include/tpm2_tss_constants.h

/*
 * Copyright 2016 The Chromium OS Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 *
 * Some TPM constants and type definitions for standalone compilation for use
 * in the firmware
 */

#ifndef __VBOOT_REFERENCE_FIRMWARE_INCLUDE_TPM2_TSS_CONSTANTS_H
#define __VBOOT_REFERENCE_FIRMWARE_INCLUDE_TPM2_TSS_CONSTANTS_H

#define TPM_BUFFER_SIZE 256

/* Tpm2 command tags. */
#define TPM_ST_NO_SESSIONS 0x8001
#define TPM_ST_SESSIONS    0x8002

/* TPM2 command codes. */
#define TPM2_Hierarchy_Control ((TPM_CC)0x00000121)
#define TPM2_Clear             ((TPM_CC)0x00000126)
#define TPM2_NV_Write          ((TPM_CC)0x00000137)
#define TPM2_NV_WriteLock      ((TPM_CC)0x00000138)
#define TPM2_SelfTest          ((TPM_CC)0x00000143)
#define TPM2_Startup           ((TPM_CC)0x00000144)
#define TPM2_Shutdown          ((TPM_CC)0x00000145)
#define TPM2_NV_Read           ((TPM_CC)0x0000014E)
#define TPM2_NV_ReadLock       ((TPM_CC)0x0000014F)
#define TPM2_GetCapability     ((TPM_CC)0x0000017A)

/* TCG Spec defined, verify for TPM2.
 * TODO(apronin): find TPM2 RC substitutes for TPM1.2 error codes.
 */
#define TPM_E_BADINDEX              ((uint32_t) 0x00000002)
#define TPM_E_INVALID_POSTINIT      ((uint32_t) 0x00000026)
#define TPM_E_BADTAG                ((uint32_t) 0x0000001E)
#define TPM_E_IOERROR               ((uint32_t) 0x0000001F)
#define TPM_E_MAXNVWRITES           ((uint32_t) 0x00000048)

#define HR_SHIFT               24
#define TPM_HT_NV_INDEX        0x01
#define HR_NV_INDEX           (TPM_HT_NV_INDEX <<  HR_SHIFT)
#define TPM_RH_PLATFORM     0x4000000C
#define TPM_RS_PW           0x40000009

/* TPM2 capabilities. */
#define TPM_CAP_FIRST                   ((TPM_CAP)0x00000000)
#define TPM_CAP_TPM_PROPERTIES          ((TPM_CAP)0x00000006)

/* TPM properties */
#define TPM_PT_NONE                     ((TPM_PT)0x00000000)
#define PT_GROUP                        ((TPM_PT)0x00000100)
#define PT_FIXED                        PT_GROUP
#define PT_VAR                          (PT_GROUP * 2)
#define TPM_PT_PERMANENT                (PT_VAR + 0)
#define TPM_PT_STARTUP_CLEAR            (PT_VAR + 1)

/* TPM startup types. */
#define TPM_SU_CLEAR                    ((TPM_SU)0x0000)
#define TPM_SU_STATE                    ((TPM_SU)0x0001)

typedef uint8_t TPMI_YES_NO;
typedef uint32_t TPM_CC;
typedef uint32_t TPM_HANDLE;
typedef TPM_HANDLE TPMI_RH_NV_INDEX;
typedef TPM_HANDLE TPMI_RH_ENABLES;
typedef uint32_t TPM_CAP;
typedef uint32_t TPM_PT;
typedef uint16_t TPM_SU;

typedef struct {
	uint16_t      size;
	uint8_t       *buffer;
} TPM2B;

typedef union {
	struct {
		uint16_t  size;
		const uint8_t   *buffer;
	} t;
	TPM2B b;
} TPM2B_MAX_NV_BUFFER;

typedef struct {
	TPM_PT property;
	uint32_t value;
} TPMS_TAGGED_PROPERTY;

typedef struct {
	uint32_t count;
	TPMS_TAGGED_PROPERTY tpm_property[1];
} TPML_TAGGED_TPM_PROPERTY;

typedef union {
	TPML_TAGGED_TPM_PROPERTY tpm_properties;
} TPMU_CAPABILITIES;

typedef struct {
	TPM_CAP capability;
	TPMU_CAPABILITIES data;
} TPMS_CAPABILITY_DATA;

struct tpm2_nv_read_cmd {
	TPMI_RH_NV_INDEX nvIndex;
	uint16_t size;
	uint16_t offset;
};

struct tpm2_nv_write_cmd {
	TPMI_RH_NV_INDEX nvIndex;
	TPM2B_MAX_NV_BUFFER data;
	uint16_t offset;
};

struct tpm2_nv_read_lock_cmd {
	TPMI_RH_NV_INDEX nvIndex;
};

struct tpm2_nv_write_lock_cmd {
	TPMI_RH_NV_INDEX nvIndex;
};

struct tpm2_hierarchy_control_cmd {
	TPMI_RH_ENABLES enable;
	TPMI_YES_NO state;
};

struct tpm2_get_capability_cmd {
	TPM_CAP capability;
	uint32_t property;
	uint32_t property_count;
};

struct tpm2_self_test_cmd {
	TPMI_YES_NO full_test;
};

struct tpm2_startup_cmd {
	TPM_SU startup_type;
};

struct tpm2_shutdown_cmd {
	TPM_SU shutdown_type;
};

/* Common command/response header. */
struct tpm_header {
	uint16_t tpm_tag;
	uint32_t tpm_size;
	TPM_CC tpm_code;
} __attribute__((packed));

struct nv_read_response {
	uint32_t params_size;
	TPM2B_MAX_NV_BUFFER buffer;
};

struct tpm2_session_attrs {
	uint8_t continueSession : 1;
	uint8_t auditExclusive  : 1;
	uint8_t auditReset      : 1;
	uint8_t reserved3_4     : 2;
	uint8_t decrypt         : 1;
	uint8_t encrypt         : 1;
	uint8_t audit           : 1;
};

struct tpm2_session_header {
	uint32_t session_handle;
	uint16_t nonce_size;
	uint8_t *nonce;
	union {
		struct tpm2_session_attrs session_attr_bits;
		uint8_t session_attrs;
	}  __attribute__((packed));
	uint16_t auth_size;
	uint8_t *auth;
};

struct get_capability_response {
	TPMI_YES_NO more_data;
	TPMS_CAPABILITY_DATA capability_data;
} __attribute__((packed));

struct tpm2_response {
	struct tpm_header hdr;
	union {
		struct nv_read_response nvr;
		struct tpm2_session_header def_space;
		struct get_capability_response cap;
	};
};

typedef struct {
	uint32_t ownerAuthSet : 1;
	uint32_t endorsementAuthSet : 1;
	uint32_t lockoutAuthSet : 1;
	uint32_t reserved3_7 : 5;
	uint32_t disableClear : 1;
	uint32_t inLockout : 1;
	uint32_t tpmGeneratedEPS : 1;
	uint32_t reserved11_31 : 21;
} TPM_PERMANENT_FLAGS;

typedef struct {
	uint32_t phEnable : 1;
	uint32_t shEnable : 1;
	uint32_t ehEnable : 1;
	uint32_t phEnableNV : 1;
	uint32_t reserved4_30 : 27;
	uint32_t orderly : 1;
} TPM_STCLEAR_FLAGS;

/* TODO(apronin): For TPM2 certain properties must be received using
 * TPM2_GetCapability instead of being hardcoded as they are now:
 * TPM_MAX_COMMAND_SIZE -> use TPM_PT_MAX_COMMAND_SIZE for TPM2.
 * TPM_PCR_DIGEST -> use TPM_PT_MAX_DIGEST for TPM2.
 */
#define TPM_MAX_COMMAND_SIZE	4096
#define TPM_PCR_DIGEST		32

#endif  /* ! __VBOOT_REFERENCE_FIRMWARE_INCLUDE_TPM2_TSS_CONSTANTS_H */