/* * Copyright (c) 2013 The Chromium OS Authors. * Coypright (c) 2013 Guntermann & Drunck GmbH * * SPDX-License-Identifier: GPL-2.0+ */ #ifndef __TPM_H #define __TPM_H #include <tis.h> /* * Here is a partial implementation of TPM commands. Please consult TCG Main * Specification for definitions of TPM commands. */ #define TPM_HEADER_SIZE 10 enum tpm_duration { TPM_SHORT = 0, TPM_MEDIUM = 1, TPM_LONG = 2, TPM_UNDEFINED, TPM_DURATION_COUNT, }; enum tpm_startup_type { TPM_ST_CLEAR = 0x0001, TPM_ST_STATE = 0x0002, TPM_ST_DEACTIVATED = 0x0003, }; enum tpm_physical_presence { TPM_PHYSICAL_PRESENCE_HW_DISABLE = 0x0200, TPM_PHYSICAL_PRESENCE_CMD_DISABLE = 0x0100, TPM_PHYSICAL_PRESENCE_LIFETIME_LOCK = 0x0080, TPM_PHYSICAL_PRESENCE_HW_ENABLE = 0x0040, TPM_PHYSICAL_PRESENCE_CMD_ENABLE = 0x0020, TPM_PHYSICAL_PRESENCE_NOTPRESENT = 0x0010, TPM_PHYSICAL_PRESENCE_PRESENT = 0x0008, TPM_PHYSICAL_PRESENCE_LOCK = 0x0004, }; enum tpm_nv_index { TPM_NV_INDEX_LOCK = 0xffffffff, TPM_NV_INDEX_0 = 0x00000000, TPM_NV_INDEX_DIR = 0x10000001, }; #define TPM_NV_PER_GLOBALLOCK (1U << 15) #define TPM_NV_PER_PPWRITE (1U << 0) #define TPM_NV_PER_READ_STCLEAR (1U << 31) #define TPM_NV_PER_WRITE_STCLEAR (1U << 14) enum { TPM_PUBEK_SIZE = 256, }; /** * TPM return codes as defined in the TCG Main specification * (TPM Main Part 2 Structures; Specification version 1.2) */ enum tpm_return_code { TPM_BASE = 0x00000000, TPM_NON_FATAL = 0x00000800, TPM_SUCCESS = TPM_BASE, /* TPM-defined fatal error codes */ TPM_AUTHFAIL = TPM_BASE + 1, TPM_BADINDEX = TPM_BASE + 2, TPM_BAD_PARAMETER = TPM_BASE + 3, TPM_AUDITFAILURE = TPM_BASE + 4, TPM_CLEAR_DISABLED = TPM_BASE + 5, TPM_DEACTIVATED = TPM_BASE + 6, TPM_DISABLED = TPM_BASE + 7, TPM_DISABLED_CMD = TPM_BASE + 8, TPM_FAIL = TPM_BASE + 9, TPM_BAD_ORDINAL = TPM_BASE + 10, TPM_INSTALL_DISABLED = TPM_BASE + 11, TPM_INVALID_KEYHANDLE = TPM_BASE + 12, TPM_KEYNOTFOUND = TPM_BASE + 13, TPM_INAPPROPRIATE_ENC = TPM_BASE + 14, TPM_MIGRATE_FAIL = TPM_BASE + 15, TPM_INVALID_PCR_INFO = TPM_BASE + 16, TPM_NOSPACE = TPM_BASE + 17, TPM_NOSRK = TPM_BASE + 18, TPM_NOTSEALED_BLOB = TPM_BASE + 19, TPM_OWNER_SET = TPM_BASE + 20, TPM_RESOURCES = TPM_BASE + 21, TPM_SHORTRANDOM = TPM_BASE + 22, TPM_SIZE = TPM_BASE + 23, TPM_WRONGPCRVAL = TPM_BASE + 24, TPM_BAD_PARAM_SIZE = TPM_BASE + 25, TPM_SHA_THREAD = TPM_BASE + 26, TPM_SHA_ERROR = TPM_BASE + 27, TPM_FAILEDSELFTEST = TPM_BASE + 28, TPM_AUTH2FAIL = TPM_BASE + 29, TPM_BADTAG = TPM_BASE + 30, TPM_IOERROR = TPM_BASE + 31, TPM_ENCRYPT_ERROR = TPM_BASE + 32, TPM_DECRYPT_ERROR = TPM_BASE + 33, TPM_INVALID_AUTHHANDLE = TPM_BASE + 34, TPM_NO_ENDORSEMENT = TPM_BASE + 35, TPM_INVALID_KEYUSAGE = TPM_BASE + 36, TPM_WRONG_ENTITYTYPE = TPM_BASE + 37, TPM_INVALID_POSTINIT = TPM_BASE + 38, TPM_INAPPROPRIATE_SIG = TPM_BASE + 39, TPM_BAD_KEY_PROPERTY = TPM_BASE + 40, TPM_BAD_MIGRATION = TPM_BASE + 41, TPM_BAD_SCHEME = TPM_BASE + 42, TPM_BAD_DATASIZE = TPM_BASE + 43, TPM_BAD_MODE = TPM_BASE + 44, TPM_BAD_PRESENCE = TPM_BASE + 45, TPM_BAD_VERSION = TPM_BASE + 46, TPM_NO_WRAP_TRANSPORT = TPM_BASE + 47, TPM_AUDITFAIL_UNSUCCESSFUL = TPM_BASE + 48, TPM_AUDITFAIL_SUCCESSFUL = TPM_BASE + 49, TPM_NOTRESETABLE = TPM_BASE + 50, TPM_NOTLOCAL = TPM_BASE + 51, TPM_BAD_TYPE = TPM_BASE + 52, TPM_INVALID_RESOURCE = TPM_BASE + 53, TPM_NOTFIPS = TPM_BASE + 54, TPM_INVALID_FAMILY = TPM_BASE + 55, TPM_NO_NV_PERMISSION = TPM_BASE + 56, TPM_REQUIRES_SIGN = TPM_BASE + 57, TPM_KEY_NOTSUPPORTED = TPM_BASE + 58, TPM_AUTH_CONFLICT = TPM_BASE + 59, TPM_AREA_LOCKED = TPM_BASE + 60, TPM_BAD_LOCALITY = TPM_BASE + 61, TPM_READ_ONLY = TPM_BASE + 62, TPM_PER_NOWRITE = TPM_BASE + 63, TPM_FAMILY_COUNT = TPM_BASE + 64, TPM_WRITE_LOCKED = TPM_BASE + 65, TPM_BAD_ATTRIBUTES = TPM_BASE + 66, TPM_INVALID_STRUCTURE = TPM_BASE + 67, TPM_KEY_OWNER_CONTROL = TPM_BASE + 68, TPM_BAD_COUNTER = TPM_BASE + 69, TPM_NOT_FULLWRITE = TPM_BASE + 70, TPM_CONTEXT_GAP = TPM_BASE + 71, TPM_MAXNVWRITES = TPM_BASE + 72, TPM_NOOPERATOR = TPM_BASE + 73, TPM_RESOURCEMISSING = TPM_BASE + 74, TPM_DELEGATE_LOCK = TPM_BASE + 75, TPM_DELEGATE_FAMILY = TPM_BASE + 76, TPM_DELEGATE_ADMIN = TPM_BASE + 77, TPM_TRANSPORT_NOTEXCLUSIVE = TPM_BASE + 78, TPM_OWNER_CONTROL = TPM_BASE + 79, TPM_DAA_RESOURCES = TPM_BASE + 80, TPM_DAA_INPUT_DATA0 = TPM_BASE + 81, TPM_DAA_INPUT_DATA1 = TPM_BASE + 82, TPM_DAA_ISSUER_SETTINGS = TPM_BASE + 83, TPM_DAA_TPM_SETTINGS = TPM_BASE + 84, TPM_DAA_STAGE = TPM_BASE + 85, TPM_DAA_ISSUER_VALIDITY = TPM_BASE + 86, TPM_DAA_WRONG_W = TPM_BASE + 87, TPM_BAD_HANDLE = TPM_BASE + 88, TPM_BAD_DELEGATE = TPM_BASE + 89, TPM_BADCONTEXT = TPM_BASE + 90, TPM_TOOMANYCONTEXTS = TPM_BASE + 91, TPM_MA_TICKET_SIGNATURE = TPM_BASE + 92, TPM_MA_DESTINATION = TPM_BASE + 93, TPM_MA_SOURCE = TPM_BASE + 94, TPM_MA_AUTHORITY = TPM_BASE + 95, TPM_PERMANENTEK = TPM_BASE + 97, TPM_BAD_SIGNATURE = TPM_BASE + 98, TPM_NOCONTEXTSPACE = TPM_BASE + 99, /* TPM-defined non-fatal errors */ TPM_RETRY = TPM_BASE + TPM_NON_FATAL, TPM_NEEDS_SELFTEST = TPM_BASE + TPM_NON_FATAL + 1, TPM_DOING_SELFTEST = TPM_BASE + TPM_NON_FATAL + 2, TPM_DEFEND_LOCK_RUNNING = TPM_BASE + TPM_NON_FATAL + 3, }; struct tpm_permanent_flags { __be16 tag; u8 disable; u8 ownership; u8 deactivated; u8 read_pubek; u8 disable_owner_clear; u8 allow_maintenance; u8 physical_presence_lifetime_lock; u8 physical_presence_hw_enable; u8 physical_presence_cmd_enable; u8 cekp_used; u8 tpm_post; u8 tpm_post_lock; u8 fips; u8 operator; u8 enable_revoke_ek; u8 nv_locked; u8 read_srk_pub; u8 tpm_established; u8 maintenance_done; u8 disable_full_da_logic_info; } __packed; #ifdef CONFIG_DM_TPM /* Max buffer size supported by our tpm */ #define TPM_DEV_BUFSIZE 1260 /** * struct tpm_chip_priv - Information about a TPM, stored by the uclass * * These values must be set up by the device's probe() method before * communcation is attempted. If the device has an xfer() method, this is * not needed. There is no need to set up @buf. * * @duration_ms: Length of each duration type in milliseconds * @retry_time_ms: Time to wait before retrying receive */ struct tpm_chip_priv { uint duration_ms[TPM_DURATION_COUNT]; uint retry_time_ms; u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */ }; /** * struct tpm_ops - low-level TPM operations * * These are designed to avoid loops and delays in the driver itself. These * should be handled in the uclass. * * In gneral you should implement everything except xfer(). Where you need * complete control of the transfer, then xfer() can be provided and will * override the other methods. * * This interface is for low-level TPM access. It does not understand the * concept of localities or the various TPM messages. That interface is * defined in the functions later on in this file, but they all translate * to bytes which are sent and received. */ struct tpm_ops { /** * open() - Request access to locality 0 for the caller * * After all commands have been completed the caller should call * close(). * * @dev: Device to close * @return 0 ok OK, -ve on error */ int (*open)(struct udevice *dev); /** * close() - Close the current session * * Releasing the locked locality. Returns 0 on success, -ve 1 on * failure (in case lock removal did not succeed). * * @dev: Device to close * @return 0 ok OK, -ve on error */ int (*close)(struct udevice *dev); /** * get_desc() - Get a text description of the TPM * * @dev: Device to check * @buf: Buffer to put the string * @size: Maximum size of buffer * @return length of string, or -ENOSPC it no space */ int (*get_desc)(struct udevice *dev, char *buf, int size); /** * send() - send data to the TPM * * @dev: Device to talk to * @sendbuf: Buffer of the data to send * @send_size: Size of the data to send * * Returns 0 on success or -ve on failure. */ int (*send)(struct udevice *dev, const uint8_t *sendbuf, size_t send_size); /** * recv() - receive a response from the TPM * * @dev: Device to talk to * @recvbuf: Buffer to save the response to * @max_size: Maximum number of bytes to receive * * Returns number of bytes received on success, -EAGAIN if the TPM * response is not ready, -EINTR if cancelled, or other -ve value on * failure. */ int (*recv)(struct udevice *dev, uint8_t *recvbuf, size_t max_size); /** * cleanup() - clean up after an operation in progress * * This is called if receiving times out. The TPM may need to abort * the current transaction if it did not complete, and make itself * ready for another. * * @dev: Device to talk to */ int (*cleanup)(struct udevice *dev); /** * xfer() - send data to the TPM and get response * * This method is optional. If it exists it is used in preference * to send(), recv() and cleanup(). It should handle all aspects of * TPM communication for a single transfer. * * @dev: Device to talk to * @sendbuf: Buffer of the data to send * @send_size: Size of the data to send * @recvbuf: Buffer to save the response to * @recv_size: Pointer to the size of the response buffer * * Returns 0 on success (and places the number of response bytes at * recv_size) or -ve on failure. */ int (*xfer)(struct udevice *dev, const uint8_t *sendbuf, size_t send_size, uint8_t *recvbuf, size_t *recv_size); }; #define tpm_get_ops(dev) ((struct tpm_ops *)device_get_ops(dev)) /** * tpm_open() - Request access to locality 0 for the caller * * After all commands have been completed the caller is supposed to * call tpm_close(). * * Returns 0 on success, -ve on failure. */ int tpm_open(struct udevice *dev); /** * tpm_close() - Close the current session * * Releasing the locked locality. Returns 0 on success, -ve 1 on * failure (in case lock removal did not succeed). */ int tpm_close(struct udevice *dev); /** * tpm_get_desc() - Get a text description of the TPM * * @dev: Device to check * @buf: Buffer to put the string * @size: Maximum size of buffer * @return length of string, or -ENOSPC it no space */ int tpm_get_desc(struct udevice *dev, char *buf, int size); /** * tpm_xfer() - send data to the TPM and get response * * This first uses the device's send() method to send the bytes. Then it calls * recv() to get the reply. If recv() returns -EAGAIN then it will delay a * short time and then call recv() again. * * Regardless of whether recv() completes successfully, it will then call * cleanup() to finish the transaction. * * Note that the outgoing data is inspected to determine command type * (ordinal) and a timeout is used for that command type. * * @sendbuf - buffer of the data to send * @send_size size of the data to send * @recvbuf - memory to save the response to * @recv_len - pointer to the size of the response buffer * * Returns 0 on success (and places the number of response bytes at * recv_len) or -ve on failure. */ int tpm_xfer(struct udevice *dev, const uint8_t *sendbuf, size_t send_size, uint8_t *recvbuf, size_t *recv_size); #endif /* CONFIG_DM_TPM */ /** * Initialize TPM device. It must be called before any TPM commands. * * @return 0 on success, non-0 on error. */ int tpm_init(void); /** * Issue a TPM_Startup command. * * @param mode TPM startup mode * @return return code of the operation */ uint32_t tpm_startup(enum tpm_startup_type mode); /** * Issue a TPM_SelfTestFull command. * * @return return code of the operation */ uint32_t tpm_self_test_full(void); /** * Issue a TPM_ContinueSelfTest command. * * @return return code of the operation */ uint32_t tpm_continue_self_test(void); /** * Issue a TPM_NV_DefineSpace command. The implementation is limited * to specify TPM_NV_ATTRIBUTES and size of the area. The area index * 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); #endif /* __TPM_H */