2 * Copyright (c) 2013 The Chromium OS Authors.
3 * Coypright (c) 2013 Guntermann & Drunck GmbH
5 * SPDX-License-Identifier: GPL-2.0+
14 * Here is a partial implementation of TPM commands. Please consult TCG Main
15 * Specification for definitions of TPM commands.
18 #define TPM_HEADER_SIZE 10
29 enum tpm_startup_type {
30 TPM_ST_CLEAR = 0x0001,
31 TPM_ST_STATE = 0x0002,
32 TPM_ST_DEACTIVATED = 0x0003,
35 enum tpm_physical_presence {
36 TPM_PHYSICAL_PRESENCE_HW_DISABLE = 0x0200,
37 TPM_PHYSICAL_PRESENCE_CMD_DISABLE = 0x0100,
38 TPM_PHYSICAL_PRESENCE_LIFETIME_LOCK = 0x0080,
39 TPM_PHYSICAL_PRESENCE_HW_ENABLE = 0x0040,
40 TPM_PHYSICAL_PRESENCE_CMD_ENABLE = 0x0020,
41 TPM_PHYSICAL_PRESENCE_NOTPRESENT = 0x0010,
42 TPM_PHYSICAL_PRESENCE_PRESENT = 0x0008,
43 TPM_PHYSICAL_PRESENCE_LOCK = 0x0004,
47 TPM_NV_INDEX_LOCK = 0xffffffff,
48 TPM_NV_INDEX_0 = 0x00000000,
49 TPM_NV_INDEX_DIR = 0x10000001,
53 * TPM return codes as defined in the TCG Main specification
54 * (TPM Main Part 2 Structures; Specification version 1.2)
56 enum tpm_return_code {
57 TPM_BASE = 0x00000000,
58 TPM_NON_FATAL = 0x00000800,
59 TPM_SUCCESS = TPM_BASE,
60 /* TPM-defined fatal error codes */
61 TPM_AUTHFAIL = TPM_BASE + 1,
62 TPM_BADINDEX = TPM_BASE + 2,
63 TPM_BAD_PARAMETER = TPM_BASE + 3,
64 TPM_AUDITFAILURE = TPM_BASE + 4,
65 TPM_CLEAR_DISABLED = TPM_BASE + 5,
66 TPM_DEACTIVATED = TPM_BASE + 6,
67 TPM_DISABLED = TPM_BASE + 7,
68 TPM_DISABLED_CMD = TPM_BASE + 8,
69 TPM_FAIL = TPM_BASE + 9,
70 TPM_BAD_ORDINAL = TPM_BASE + 10,
71 TPM_INSTALL_DISABLED = TPM_BASE + 11,
72 TPM_INVALID_KEYHANDLE = TPM_BASE + 12,
73 TPM_KEYNOTFOUND = TPM_BASE + 13,
74 TPM_INAPPROPRIATE_ENC = TPM_BASE + 14,
75 TPM_MIGRATE_FAIL = TPM_BASE + 15,
76 TPM_INVALID_PCR_INFO = TPM_BASE + 16,
77 TPM_NOSPACE = TPM_BASE + 17,
78 TPM_NOSRK = TPM_BASE + 18,
79 TPM_NOTSEALED_BLOB = TPM_BASE + 19,
80 TPM_OWNER_SET = TPM_BASE + 20,
81 TPM_RESOURCES = TPM_BASE + 21,
82 TPM_SHORTRANDOM = TPM_BASE + 22,
83 TPM_SIZE = TPM_BASE + 23,
84 TPM_WRONGPCRVAL = TPM_BASE + 24,
85 TPM_BAD_PARAM_SIZE = TPM_BASE + 25,
86 TPM_SHA_THREAD = TPM_BASE + 26,
87 TPM_SHA_ERROR = TPM_BASE + 27,
88 TPM_FAILEDSELFTEST = TPM_BASE + 28,
89 TPM_AUTH2FAIL = TPM_BASE + 29,
90 TPM_BADTAG = TPM_BASE + 30,
91 TPM_IOERROR = TPM_BASE + 31,
92 TPM_ENCRYPT_ERROR = TPM_BASE + 32,
93 TPM_DECRYPT_ERROR = TPM_BASE + 33,
94 TPM_INVALID_AUTHHANDLE = TPM_BASE + 34,
95 TPM_NO_ENDORSEMENT = TPM_BASE + 35,
96 TPM_INVALID_KEYUSAGE = TPM_BASE + 36,
97 TPM_WRONG_ENTITYTYPE = TPM_BASE + 37,
98 TPM_INVALID_POSTINIT = TPM_BASE + 38,
99 TPM_INAPPROPRIATE_SIG = TPM_BASE + 39,
100 TPM_BAD_KEY_PROPERTY = TPM_BASE + 40,
101 TPM_BAD_MIGRATION = TPM_BASE + 41,
102 TPM_BAD_SCHEME = TPM_BASE + 42,
103 TPM_BAD_DATASIZE = TPM_BASE + 43,
104 TPM_BAD_MODE = TPM_BASE + 44,
105 TPM_BAD_PRESENCE = TPM_BASE + 45,
106 TPM_BAD_VERSION = TPM_BASE + 46,
107 TPM_NO_WRAP_TRANSPORT = TPM_BASE + 47,
108 TPM_AUDITFAIL_UNSUCCESSFUL = TPM_BASE + 48,
109 TPM_AUDITFAIL_SUCCESSFUL = TPM_BASE + 49,
110 TPM_NOTRESETABLE = TPM_BASE + 50,
111 TPM_NOTLOCAL = TPM_BASE + 51,
112 TPM_BAD_TYPE = TPM_BASE + 52,
113 TPM_INVALID_RESOURCE = TPM_BASE + 53,
114 TPM_NOTFIPS = TPM_BASE + 54,
115 TPM_INVALID_FAMILY = TPM_BASE + 55,
116 TPM_NO_NV_PERMISSION = TPM_BASE + 56,
117 TPM_REQUIRES_SIGN = TPM_BASE + 57,
118 TPM_KEY_NOTSUPPORTED = TPM_BASE + 58,
119 TPM_AUTH_CONFLICT = TPM_BASE + 59,
120 TPM_AREA_LOCKED = TPM_BASE + 60,
121 TPM_BAD_LOCALITY = TPM_BASE + 61,
122 TPM_READ_ONLY = TPM_BASE + 62,
123 TPM_PER_NOWRITE = TPM_BASE + 63,
124 TPM_FAMILY_COUNT = TPM_BASE + 64,
125 TPM_WRITE_LOCKED = TPM_BASE + 65,
126 TPM_BAD_ATTRIBUTES = TPM_BASE + 66,
127 TPM_INVALID_STRUCTURE = TPM_BASE + 67,
128 TPM_KEY_OWNER_CONTROL = TPM_BASE + 68,
129 TPM_BAD_COUNTER = TPM_BASE + 69,
130 TPM_NOT_FULLWRITE = TPM_BASE + 70,
131 TPM_CONTEXT_GAP = TPM_BASE + 71,
132 TPM_MAXNVWRITES = TPM_BASE + 72,
133 TPM_NOOPERATOR = TPM_BASE + 73,
134 TPM_RESOURCEMISSING = TPM_BASE + 74,
135 TPM_DELEGATE_LOCK = TPM_BASE + 75,
136 TPM_DELEGATE_FAMILY = TPM_BASE + 76,
137 TPM_DELEGATE_ADMIN = TPM_BASE + 77,
138 TPM_TRANSPORT_NOTEXCLUSIVE = TPM_BASE + 78,
139 TPM_OWNER_CONTROL = TPM_BASE + 79,
140 TPM_DAA_RESOURCES = TPM_BASE + 80,
141 TPM_DAA_INPUT_DATA0 = TPM_BASE + 81,
142 TPM_DAA_INPUT_DATA1 = TPM_BASE + 82,
143 TPM_DAA_ISSUER_SETTINGS = TPM_BASE + 83,
144 TPM_DAA_TPM_SETTINGS = TPM_BASE + 84,
145 TPM_DAA_STAGE = TPM_BASE + 85,
146 TPM_DAA_ISSUER_VALIDITY = TPM_BASE + 86,
147 TPM_DAA_WRONG_W = TPM_BASE + 87,
148 TPM_BAD_HANDLE = TPM_BASE + 88,
149 TPM_BAD_DELEGATE = TPM_BASE + 89,
150 TPM_BADCONTEXT = TPM_BASE + 90,
151 TPM_TOOMANYCONTEXTS = TPM_BASE + 91,
152 TPM_MA_TICKET_SIGNATURE = TPM_BASE + 92,
153 TPM_MA_DESTINATION = TPM_BASE + 93,
154 TPM_MA_SOURCE = TPM_BASE + 94,
155 TPM_MA_AUTHORITY = TPM_BASE + 95,
156 TPM_PERMANENTEK = TPM_BASE + 97,
157 TPM_BAD_SIGNATURE = TPM_BASE + 98,
158 TPM_NOCONTEXTSPACE = TPM_BASE + 99,
159 /* TPM-defined non-fatal errors */
160 TPM_RETRY = TPM_BASE + TPM_NON_FATAL,
161 TPM_NEEDS_SELFTEST = TPM_BASE + TPM_NON_FATAL + 1,
162 TPM_DOING_SELFTEST = TPM_BASE + TPM_NON_FATAL + 2,
163 TPM_DEFEND_LOCK_RUNNING = TPM_BASE + TPM_NON_FATAL + 3,
168 /* Max buffer size supported by our tpm */
169 #define TPM_DEV_BUFSIZE 1260
172 * struct tpm_chip_priv - Information about a TPM, stored by the uclass
174 * These values must be set up by the device's probe() method before
175 * communcation is attempted. If the device has an xfer() method, this is
176 * not needed. There is no need to set up @buf.
178 * @duration_ms: Length of each duration type in milliseconds
179 * @retry_time_ms: Time to wait before retrying receive
181 struct tpm_chip_priv {
182 uint duration_ms[TPM_DURATION_COUNT];
184 u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */
188 * struct tpm_ops - low-level TPM operations
190 * These are designed to avoid loops and delays in the driver itself. These
191 * should be handled in the uclass.
193 * In gneral you should implement everything except xfer(). Where you need
194 * complete control of the transfer, then xfer() can be provided and will
195 * override the other methods.
197 * This interface is for low-level TPM access. It does not understand the
198 * concept of localities or the various TPM messages. That interface is
199 * defined in the functions later on in this file, but they all translate
200 * to bytes which are sent and received.
204 * open() - Request access to locality 0 for the caller
206 * After all commands have been completed the caller should call
209 * @dev: Device to close
210 * @return 0 ok OK, -ve on error
212 int (*open)(struct udevice *dev);
215 * close() - Close the current session
217 * Releasing the locked locality. Returns 0 on success, -ve 1 on
218 * failure (in case lock removal did not succeed).
220 * @dev: Device to close
221 * @return 0 ok OK, -ve on error
223 int (*close)(struct udevice *dev);
226 * get_desc() - Get a text description of the TPM
228 * @dev: Device to check
229 * @buf: Buffer to put the string
230 * @size: Maximum size of buffer
231 * @return length of string, or -ENOSPC it no space
233 int (*get_desc)(struct udevice *dev, char *buf, int size);
236 * send() - send data to the TPM
238 * @dev: Device to talk to
239 * @sendbuf: Buffer of the data to send
240 * @send_size: Size of the data to send
242 * Returns 0 on success or -ve on failure.
244 int (*send)(struct udevice *dev, const uint8_t *sendbuf,
248 * recv() - receive a response from the TPM
250 * @dev: Device to talk to
251 * @recvbuf: Buffer to save the response to
252 * @max_size: Maximum number of bytes to receive
254 * Returns number of bytes received on success, -EAGAIN if the TPM
255 * response is not ready, -EINTR if cancelled, or other -ve value on
258 int (*recv)(struct udevice *dev, uint8_t *recvbuf, size_t max_size);
261 * cleanup() - clean up after an operation in progress
263 * This is called if receiving times out. The TPM may need to abort
264 * the current transaction if it did not complete, and make itself
267 * @dev: Device to talk to
269 int (*cleanup)(struct udevice *dev);
272 * xfer() - send data to the TPM and get response
274 * This method is optional. If it exists it is used in preference
275 * to send(), recv() and cleanup(). It should handle all aspects of
276 * TPM communication for a single transfer.
278 * @dev: Device to talk to
279 * @sendbuf: Buffer of the data to send
280 * @send_size: Size of the data to send
281 * @recvbuf: Buffer to save the response to
282 * @recv_size: Pointer to the size of the response buffer
284 * Returns 0 on success (and places the number of response bytes at
285 * recv_size) or -ve on failure.
287 int (*xfer)(struct udevice *dev, const uint8_t *sendbuf,
288 size_t send_size, uint8_t *recvbuf, size_t *recv_size);
291 #define tpm_get_ops(dev) ((struct tpm_ops *)device_get_ops(dev))
294 * tpm_open() - Request access to locality 0 for the caller
296 * After all commands have been completed the caller is supposed to
299 * Returns 0 on success, -ve on failure.
301 int tpm_open(struct udevice *dev);
304 * tpm_close() - Close the current session
306 * Releasing the locked locality. Returns 0 on success, -ve 1 on
307 * failure (in case lock removal did not succeed).
309 int tpm_close(struct udevice *dev);
312 * tpm_get_desc() - Get a text description of the TPM
314 * @dev: Device to check
315 * @buf: Buffer to put the string
316 * @size: Maximum size of buffer
317 * @return length of string, or -ENOSPC it no space
319 int tpm_get_desc(struct udevice *dev, char *buf, int size);
322 * tpm_xfer() - send data to the TPM and get response
324 * This first uses the device's send() method to send the bytes. Then it calls
325 * recv() to get the reply. If recv() returns -EAGAIN then it will delay a
326 * short time and then call recv() again.
328 * Regardless of whether recv() completes successfully, it will then call
329 * cleanup() to finish the transaction.
331 * Note that the outgoing data is inspected to determine command type
332 * (ordinal) and a timeout is used for that command type.
334 * @sendbuf - buffer of the data to send
335 * @send_size size of the data to send
336 * @recvbuf - memory to save the response to
337 * @recv_len - pointer to the size of the response buffer
339 * Returns 0 on success (and places the number of response bytes at
340 * recv_len) or -ve on failure.
342 int tpm_xfer(struct udevice *dev, const uint8_t *sendbuf, size_t send_size,
343 uint8_t *recvbuf, size_t *recv_size);
345 #endif /* CONFIG_DM_TPM */
348 * Initialize TPM device. It must be called before any TPM commands.
350 * @return 0 on success, non-0 on error.
352 uint32_t tpm_init(void);
355 * Issue a TPM_Startup command.
357 * @param mode TPM startup mode
358 * @return return code of the operation
360 uint32_t tpm_startup(enum tpm_startup_type mode);
363 * Issue a TPM_SelfTestFull command.
365 * @return return code of the operation
367 uint32_t tpm_self_test_full(void);
370 * Issue a TPM_ContinueSelfTest command.
372 * @return return code of the operation
374 uint32_t tpm_continue_self_test(void);
377 * Issue a TPM_NV_DefineSpace command. The implementation is limited
378 * to specify TPM_NV_ATTRIBUTES and size of the area. The area index
379 * could be one of the special value listed in enum tpm_nv_index.
381 * @param index index of the area
382 * @param perm TPM_NV_ATTRIBUTES of the area
383 * @param size size of the area
384 * @return return code of the operation
386 uint32_t tpm_nv_define_space(uint32_t index, uint32_t perm, uint32_t size);
389 * Issue a TPM_NV_ReadValue command. This implementation is limited
390 * to read the area from offset 0. The area index could be one of
391 * the special value listed in enum tpm_nv_index.
393 * @param index index of the area
394 * @param data output buffer of the area contents
395 * @param count size of output buffer
396 * @return return code of the operation
398 uint32_t tpm_nv_read_value(uint32_t index, void *data, uint32_t count);
401 * Issue a TPM_NV_WriteValue command. This implementation is limited
402 * to write the area from offset 0. The area index could be one of
403 * the special value listed in enum tpm_nv_index.
405 * @param index index of the area
406 * @param data input buffer to be wrote to the area
407 * @param length length of data bytes of input buffer
408 * @return return code of the operation
410 uint32_t tpm_nv_write_value(uint32_t index, const void *data, uint32_t length);
413 * Issue a TPM_Extend command.
415 * @param index index of the PCR
416 * @param in_digest 160-bit value representing the event to be
418 * @param out_digest 160-bit PCR value after execution of the
420 * @return return code of the operation
422 uint32_t tpm_extend(uint32_t index, const void *in_digest, void *out_digest);
425 * Issue a TPM_PCRRead command.
427 * @param index index of the PCR
428 * @param data output buffer for contents of the named PCR
429 * @param count size of output buffer
430 * @return return code of the operation
432 uint32_t tpm_pcr_read(uint32_t index, void *data, size_t count);
435 * Issue a TSC_PhysicalPresence command. TPM physical presence flag
436 * is bit-wise OR'ed of flags listed in enum tpm_physical_presence.
438 * @param presence TPM physical presence flag
439 * @return return code of the operation
441 uint32_t tpm_tsc_physical_presence(uint16_t presence);
444 * Issue a TPM_ReadPubek command.
446 * @param data output buffer for the public endorsement key
447 * @param count size of ouput buffer
448 * @return return code of the operation
450 uint32_t tpm_read_pubek(void *data, size_t count);
453 * Issue a TPM_ForceClear command.
455 * @return return code of the operation
457 uint32_t tpm_force_clear(void);
460 * Issue a TPM_PhysicalEnable command.
462 * @return return code of the operation
464 uint32_t tpm_physical_enable(void);
467 * Issue a TPM_PhysicalDisable command.
469 * @return return code of the operation
471 uint32_t tpm_physical_disable(void);
474 * Issue a TPM_PhysicalSetDeactivated command.
476 * @param state boolean state of the deactivated flag
477 * @return return code of the operation
479 uint32_t tpm_physical_set_deactivated(uint8_t state);
482 * Issue a TPM_GetCapability command. This implementation is limited
483 * to query sub_cap index that is 4-byte wide.
485 * @param cap_area partition of capabilities
486 * @param sub_cap further definition of capability, which is
487 * limited to be 4-byte wide
488 * @param cap output buffer for capability information
489 * @param count size of ouput buffer
490 * @return return code of the operation
492 uint32_t tpm_get_capability(uint32_t cap_area, uint32_t sub_cap,
493 void *cap, size_t count);
496 * Issue a TPM_FlushSpecific command for a AUTH ressource.
498 * @param auth_handle handle of the auth session
499 * @return return code of the operation
501 uint32_t tpm_terminate_auth_session(uint32_t auth_handle);
504 * Issue a TPM_OIAP command to setup an object independant authorization
506 * Information about the session is stored internally.
507 * If there was already an OIAP session active it is terminated and a new
510 * @param auth_handle pointer to the (new) auth handle or NULL.
511 * @return return code of the operation
513 uint32_t tpm_oiap(uint32_t *auth_handle);
516 * Ends an active OIAP session.
518 * @return return code of the operation
520 uint32_t tpm_end_oiap(void);
523 * Issue a TPM_LoadKey2 (Auth1) command using an OIAP session for authenticating
524 * the usage of the parent key.
526 * @param parent_handle handle of the parent key.
527 * @param key pointer to the key structure (TPM_KEY or TPM_KEY12).
528 * @param key_length size of the key structure
529 * @param parent_key_usage_auth usage auth for the parent key
530 * @param key_handle pointer to the key handle
531 * @return return code of the operation
533 uint32_t tpm_load_key2_oiap(uint32_t parent_handle,
534 const void *key, size_t key_length,
535 const void *parent_key_usage_auth,
536 uint32_t *key_handle);
539 * Issue a TPM_GetPubKey (Auth1) command using an OIAP session for
540 * authenticating the usage of the key.
542 * @param key_handle handle of the key
543 * @param usage_auth usage auth for the key
544 * @param pubkey pointer to the pub key buffer; may be NULL if the pubkey
545 * should not be stored.
546 * @param pubkey_len pointer to the pub key buffer len. On entry: the size of
547 * the provided pubkey buffer. On successful exit: the size
548 * of the stored TPM_PUBKEY structure (iff pubkey != NULL).
549 * @return return code of the operation
551 uint32_t tpm_get_pub_key_oiap(uint32_t key_handle, const void *usage_auth,
552 void *pubkey, size_t *pubkey_len);