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Vadim Bendebury5e124722011-10-17 08:36:14 +00001/*
Che-liang Chiou8732b072013-02-28 09:34:57 +00002 * Copyright (c) 2013 The Chromium OS Authors.
Reinhard Pfaube6c1522013-06-26 15:55:13 +02003 * Coypright (c) 2013 Guntermann & Drunck GmbH
Vadim Bendebury5e124722011-10-17 08:36:14 +00004 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02005 * SPDX-License-Identifier: GPL-2.0+
Vadim Bendebury5e124722011-10-17 08:36:14 +00006 */
7
Che-liang Chiou8732b072013-02-28 09:34:57 +00008#ifndef __TPM_H
9#define __TPM_H
Vadim Bendebury5e124722011-10-17 08:36:14 +000010
Vadim Bendebury5e124722011-10-17 08:36:14 +000011/*
Che-liang Chiou8732b072013-02-28 09:34:57 +000012 * Here is a partial implementation of TPM commands. Please consult TCG Main
13 * Specification for definitions of TPM commands.
Vadim Bendebury5e124722011-10-17 08:36:14 +000014 */
Vadim Bendebury5e124722011-10-17 08:36:14 +000015
Simon Glassf255d312015-08-22 18:31:31 -060016#define TPM_HEADER_SIZE 10
17
18enum tpm_duration {
19 TPM_SHORT = 0,
20 TPM_MEDIUM = 1,
21 TPM_LONG = 2,
22 TPM_UNDEFINED,
23
24 TPM_DURATION_COUNT,
25};
26
Che-liang Chiou8732b072013-02-28 09:34:57 +000027enum tpm_startup_type {
28 TPM_ST_CLEAR = 0x0001,
29 TPM_ST_STATE = 0x0002,
30 TPM_ST_DEACTIVATED = 0x0003,
31};
32
33enum tpm_physical_presence {
34 TPM_PHYSICAL_PRESENCE_HW_DISABLE = 0x0200,
35 TPM_PHYSICAL_PRESENCE_CMD_DISABLE = 0x0100,
36 TPM_PHYSICAL_PRESENCE_LIFETIME_LOCK = 0x0080,
37 TPM_PHYSICAL_PRESENCE_HW_ENABLE = 0x0040,
38 TPM_PHYSICAL_PRESENCE_CMD_ENABLE = 0x0020,
39 TPM_PHYSICAL_PRESENCE_NOTPRESENT = 0x0010,
40 TPM_PHYSICAL_PRESENCE_PRESENT = 0x0008,
41 TPM_PHYSICAL_PRESENCE_LOCK = 0x0004,
42};
43
44enum tpm_nv_index {
45 TPM_NV_INDEX_LOCK = 0xffffffff,
46 TPM_NV_INDEX_0 = 0x00000000,
47 TPM_NV_INDEX_DIR = 0x10000001,
48};
49
Mario Six7690be32017-01-11 16:00:50 +010050enum tpm_resource_type {
51 TPM_RT_KEY = 0x00000001,
52 TPM_RT_AUTH = 0x00000002,
53 TPM_RT_HASH = 0x00000003,
54 TPM_RT_TRANS = 0x00000004,
55 TPM_RT_CONTEXT = 0x00000005,
56 TPM_RT_COUNTER = 0x00000006,
57 TPM_RT_DELEGATE = 0x00000007,
58 TPM_RT_DAA_TPM = 0x00000008,
59 TPM_RT_DAA_V0 = 0x00000009,
60 TPM_RT_DAA_V1 = 0x0000000A,
61};
62
63enum tpm_capability_areas {
64 TPM_CAP_ORD = 0x00000001,
65 TPM_CAP_ALG = 0x00000002,
66 TPM_CAP_PID = 0x00000003,
67 TPM_CAP_FLAG = 0x00000004,
68 TPM_CAP_PROPERTY = 0x00000005,
69 TPM_CAP_VERSION = 0x00000006,
70 TPM_CAP_KEY_HANDLE = 0x00000007,
71 TPM_CAP_CHECK_LOADED = 0x00000008,
72 TPM_CAP_SYM_MODE = 0x00000009,
73 TPM_CAP_KEY_STATUS = 0x0000000C,
74 TPM_CAP_NV_LIST = 0x0000000D,
75 TPM_CAP_MFR = 0x00000010,
76 TPM_CAP_NV_INDEX = 0x00000011,
77 TPM_CAP_TRANS_ALG = 0x00000012,
78 TPM_CAP_HANDLE = 0x00000014,
79 TPM_CAP_TRANS_ES = 0x00000015,
80 TPM_CAP_AUTH_ENCRYPT = 0x00000017,
81 TPM_CAP_SELECT_SIZE = 0x00000018,
82 TPM_CAP_DA_LOGIC = 0x00000019,
83 TPM_CAP_VERSION_VAL = 0x0000001A,
84};
85
Simon Glass2132f972015-08-22 18:31:41 -060086#define TPM_NV_PER_GLOBALLOCK (1U << 15)
87#define TPM_NV_PER_PPWRITE (1U << 0)
88#define TPM_NV_PER_READ_STCLEAR (1U << 31)
89#define TPM_NV_PER_WRITE_STCLEAR (1U << 14)
90
91enum {
92 TPM_PUBEK_SIZE = 256,
93};
94
Che-liang Chiou8732b072013-02-28 09:34:57 +000095/**
Reinhard Pfaube6c1522013-06-26 15:55:13 +020096 * TPM return codes as defined in the TCG Main specification
97 * (TPM Main Part 2 Structures; Specification version 1.2)
98 */
99enum tpm_return_code {
100 TPM_BASE = 0x00000000,
101 TPM_NON_FATAL = 0x00000800,
102 TPM_SUCCESS = TPM_BASE,
103 /* TPM-defined fatal error codes */
104 TPM_AUTHFAIL = TPM_BASE + 1,
105 TPM_BADINDEX = TPM_BASE + 2,
106 TPM_BAD_PARAMETER = TPM_BASE + 3,
107 TPM_AUDITFAILURE = TPM_BASE + 4,
108 TPM_CLEAR_DISABLED = TPM_BASE + 5,
109 TPM_DEACTIVATED = TPM_BASE + 6,
110 TPM_DISABLED = TPM_BASE + 7,
111 TPM_DISABLED_CMD = TPM_BASE + 8,
112 TPM_FAIL = TPM_BASE + 9,
113 TPM_BAD_ORDINAL = TPM_BASE + 10,
114 TPM_INSTALL_DISABLED = TPM_BASE + 11,
115 TPM_INVALID_KEYHANDLE = TPM_BASE + 12,
116 TPM_KEYNOTFOUND = TPM_BASE + 13,
117 TPM_INAPPROPRIATE_ENC = TPM_BASE + 14,
118 TPM_MIGRATE_FAIL = TPM_BASE + 15,
119 TPM_INVALID_PCR_INFO = TPM_BASE + 16,
120 TPM_NOSPACE = TPM_BASE + 17,
121 TPM_NOSRK = TPM_BASE + 18,
122 TPM_NOTSEALED_BLOB = TPM_BASE + 19,
123 TPM_OWNER_SET = TPM_BASE + 20,
124 TPM_RESOURCES = TPM_BASE + 21,
125 TPM_SHORTRANDOM = TPM_BASE + 22,
126 TPM_SIZE = TPM_BASE + 23,
127 TPM_WRONGPCRVAL = TPM_BASE + 24,
128 TPM_BAD_PARAM_SIZE = TPM_BASE + 25,
129 TPM_SHA_THREAD = TPM_BASE + 26,
130 TPM_SHA_ERROR = TPM_BASE + 27,
131 TPM_FAILEDSELFTEST = TPM_BASE + 28,
132 TPM_AUTH2FAIL = TPM_BASE + 29,
133 TPM_BADTAG = TPM_BASE + 30,
134 TPM_IOERROR = TPM_BASE + 31,
135 TPM_ENCRYPT_ERROR = TPM_BASE + 32,
136 TPM_DECRYPT_ERROR = TPM_BASE + 33,
137 TPM_INVALID_AUTHHANDLE = TPM_BASE + 34,
138 TPM_NO_ENDORSEMENT = TPM_BASE + 35,
139 TPM_INVALID_KEYUSAGE = TPM_BASE + 36,
140 TPM_WRONG_ENTITYTYPE = TPM_BASE + 37,
141 TPM_INVALID_POSTINIT = TPM_BASE + 38,
142 TPM_INAPPROPRIATE_SIG = TPM_BASE + 39,
143 TPM_BAD_KEY_PROPERTY = TPM_BASE + 40,
144 TPM_BAD_MIGRATION = TPM_BASE + 41,
145 TPM_BAD_SCHEME = TPM_BASE + 42,
146 TPM_BAD_DATASIZE = TPM_BASE + 43,
147 TPM_BAD_MODE = TPM_BASE + 44,
148 TPM_BAD_PRESENCE = TPM_BASE + 45,
149 TPM_BAD_VERSION = TPM_BASE + 46,
150 TPM_NO_WRAP_TRANSPORT = TPM_BASE + 47,
151 TPM_AUDITFAIL_UNSUCCESSFUL = TPM_BASE + 48,
152 TPM_AUDITFAIL_SUCCESSFUL = TPM_BASE + 49,
153 TPM_NOTRESETABLE = TPM_BASE + 50,
154 TPM_NOTLOCAL = TPM_BASE + 51,
155 TPM_BAD_TYPE = TPM_BASE + 52,
156 TPM_INVALID_RESOURCE = TPM_BASE + 53,
157 TPM_NOTFIPS = TPM_BASE + 54,
158 TPM_INVALID_FAMILY = TPM_BASE + 55,
159 TPM_NO_NV_PERMISSION = TPM_BASE + 56,
160 TPM_REQUIRES_SIGN = TPM_BASE + 57,
161 TPM_KEY_NOTSUPPORTED = TPM_BASE + 58,
162 TPM_AUTH_CONFLICT = TPM_BASE + 59,
163 TPM_AREA_LOCKED = TPM_BASE + 60,
164 TPM_BAD_LOCALITY = TPM_BASE + 61,
165 TPM_READ_ONLY = TPM_BASE + 62,
166 TPM_PER_NOWRITE = TPM_BASE + 63,
167 TPM_FAMILY_COUNT = TPM_BASE + 64,
168 TPM_WRITE_LOCKED = TPM_BASE + 65,
169 TPM_BAD_ATTRIBUTES = TPM_BASE + 66,
170 TPM_INVALID_STRUCTURE = TPM_BASE + 67,
171 TPM_KEY_OWNER_CONTROL = TPM_BASE + 68,
172 TPM_BAD_COUNTER = TPM_BASE + 69,
173 TPM_NOT_FULLWRITE = TPM_BASE + 70,
174 TPM_CONTEXT_GAP = TPM_BASE + 71,
175 TPM_MAXNVWRITES = TPM_BASE + 72,
176 TPM_NOOPERATOR = TPM_BASE + 73,
177 TPM_RESOURCEMISSING = TPM_BASE + 74,
178 TPM_DELEGATE_LOCK = TPM_BASE + 75,
179 TPM_DELEGATE_FAMILY = TPM_BASE + 76,
180 TPM_DELEGATE_ADMIN = TPM_BASE + 77,
181 TPM_TRANSPORT_NOTEXCLUSIVE = TPM_BASE + 78,
182 TPM_OWNER_CONTROL = TPM_BASE + 79,
183 TPM_DAA_RESOURCES = TPM_BASE + 80,
184 TPM_DAA_INPUT_DATA0 = TPM_BASE + 81,
185 TPM_DAA_INPUT_DATA1 = TPM_BASE + 82,
186 TPM_DAA_ISSUER_SETTINGS = TPM_BASE + 83,
187 TPM_DAA_TPM_SETTINGS = TPM_BASE + 84,
188 TPM_DAA_STAGE = TPM_BASE + 85,
189 TPM_DAA_ISSUER_VALIDITY = TPM_BASE + 86,
190 TPM_DAA_WRONG_W = TPM_BASE + 87,
191 TPM_BAD_HANDLE = TPM_BASE + 88,
192 TPM_BAD_DELEGATE = TPM_BASE + 89,
193 TPM_BADCONTEXT = TPM_BASE + 90,
194 TPM_TOOMANYCONTEXTS = TPM_BASE + 91,
195 TPM_MA_TICKET_SIGNATURE = TPM_BASE + 92,
196 TPM_MA_DESTINATION = TPM_BASE + 93,
197 TPM_MA_SOURCE = TPM_BASE + 94,
198 TPM_MA_AUTHORITY = TPM_BASE + 95,
199 TPM_PERMANENTEK = TPM_BASE + 97,
200 TPM_BAD_SIGNATURE = TPM_BASE + 98,
201 TPM_NOCONTEXTSPACE = TPM_BASE + 99,
202 /* TPM-defined non-fatal errors */
203 TPM_RETRY = TPM_BASE + TPM_NON_FATAL,
204 TPM_NEEDS_SELFTEST = TPM_BASE + TPM_NON_FATAL + 1,
205 TPM_DOING_SELFTEST = TPM_BASE + TPM_NON_FATAL + 2,
206 TPM_DEFEND_LOCK_RUNNING = TPM_BASE + TPM_NON_FATAL + 3,
207};
208
Simon Glass2132f972015-08-22 18:31:41 -0600209struct tpm_permanent_flags {
210 __be16 tag;
211 u8 disable;
212 u8 ownership;
213 u8 deactivated;
214 u8 read_pubek;
215 u8 disable_owner_clear;
216 u8 allow_maintenance;
217 u8 physical_presence_lifetime_lock;
218 u8 physical_presence_hw_enable;
219 u8 physical_presence_cmd_enable;
220 u8 cekp_used;
221 u8 tpm_post;
222 u8 tpm_post_lock;
223 u8 fips;
224 u8 operator;
225 u8 enable_revoke_ek;
226 u8 nv_locked;
227 u8 read_srk_pub;
228 u8 tpm_established;
229 u8 maintenance_done;
230 u8 disable_full_da_logic_info;
231} __packed;
232
Simon Glassf255d312015-08-22 18:31:31 -0600233/* Max buffer size supported by our tpm */
234#define TPM_DEV_BUFSIZE 1260
235
236/**
237 * struct tpm_chip_priv - Information about a TPM, stored by the uclass
238 *
239 * These values must be set up by the device's probe() method before
240 * communcation is attempted. If the device has an xfer() method, this is
241 * not needed. There is no need to set up @buf.
242 *
243 * @duration_ms: Length of each duration type in milliseconds
244 * @retry_time_ms: Time to wait before retrying receive
245 */
246struct tpm_chip_priv {
247 uint duration_ms[TPM_DURATION_COUNT];
248 uint retry_time_ms;
249 u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */
250};
251
252/**
253 * struct tpm_ops - low-level TPM operations
254 *
255 * These are designed to avoid loops and delays in the driver itself. These
256 * should be handled in the uclass.
257 *
258 * In gneral you should implement everything except xfer(). Where you need
259 * complete control of the transfer, then xfer() can be provided and will
260 * override the other methods.
261 *
262 * This interface is for low-level TPM access. It does not understand the
263 * concept of localities or the various TPM messages. That interface is
264 * defined in the functions later on in this file, but they all translate
265 * to bytes which are sent and received.
266 */
267struct tpm_ops {
268 /**
269 * open() - Request access to locality 0 for the caller
270 *
271 * After all commands have been completed the caller should call
272 * close().
273 *
274 * @dev: Device to close
275 * @return 0 ok OK, -ve on error
276 */
277 int (*open)(struct udevice *dev);
278
279 /**
280 * close() - Close the current session
281 *
282 * Releasing the locked locality. Returns 0 on success, -ve 1 on
283 * failure (in case lock removal did not succeed).
284 *
285 * @dev: Device to close
286 * @return 0 ok OK, -ve on error
287 */
288 int (*close)(struct udevice *dev);
289
290 /**
291 * get_desc() - Get a text description of the TPM
292 *
293 * @dev: Device to check
294 * @buf: Buffer to put the string
295 * @size: Maximum size of buffer
296 * @return length of string, or -ENOSPC it no space
297 */
298 int (*get_desc)(struct udevice *dev, char *buf, int size);
299
300 /**
301 * send() - send data to the TPM
302 *
303 * @dev: Device to talk to
304 * @sendbuf: Buffer of the data to send
305 * @send_size: Size of the data to send
306 *
307 * Returns 0 on success or -ve on failure.
308 */
309 int (*send)(struct udevice *dev, const uint8_t *sendbuf,
310 size_t send_size);
311
312 /**
313 * recv() - receive a response from the TPM
314 *
315 * @dev: Device to talk to
316 * @recvbuf: Buffer to save the response to
317 * @max_size: Maximum number of bytes to receive
318 *
319 * Returns number of bytes received on success, -EAGAIN if the TPM
320 * response is not ready, -EINTR if cancelled, or other -ve value on
321 * failure.
322 */
323 int (*recv)(struct udevice *dev, uint8_t *recvbuf, size_t max_size);
324
325 /**
326 * cleanup() - clean up after an operation in progress
327 *
328 * This is called if receiving times out. The TPM may need to abort
329 * the current transaction if it did not complete, and make itself
330 * ready for another.
331 *
332 * @dev: Device to talk to
333 */
334 int (*cleanup)(struct udevice *dev);
335
336 /**
337 * xfer() - send data to the TPM and get response
338 *
339 * This method is optional. If it exists it is used in preference
340 * to send(), recv() and cleanup(). It should handle all aspects of
341 * TPM communication for a single transfer.
342 *
343 * @dev: Device to talk to
344 * @sendbuf: Buffer of the data to send
345 * @send_size: Size of the data to send
346 * @recvbuf: Buffer to save the response to
347 * @recv_size: Pointer to the size of the response buffer
348 *
349 * Returns 0 on success (and places the number of response bytes at
350 * recv_size) or -ve on failure.
351 */
352 int (*xfer)(struct udevice *dev, const uint8_t *sendbuf,
353 size_t send_size, uint8_t *recvbuf, size_t *recv_size);
354};
355
356#define tpm_get_ops(dev) ((struct tpm_ops *)device_get_ops(dev))
357
358/**
359 * tpm_open() - Request access to locality 0 for the caller
360 *
361 * After all commands have been completed the caller is supposed to
362 * call tpm_close().
363 *
364 * Returns 0 on success, -ve on failure.
365 */
366int tpm_open(struct udevice *dev);
367
368/**
369 * tpm_close() - Close the current session
370 *
371 * Releasing the locked locality. Returns 0 on success, -ve 1 on
372 * failure (in case lock removal did not succeed).
373 */
374int tpm_close(struct udevice *dev);
375
376/**
377 * tpm_get_desc() - Get a text description of the TPM
378 *
379 * @dev: Device to check
380 * @buf: Buffer to put the string
381 * @size: Maximum size of buffer
382 * @return length of string, or -ENOSPC it no space
383 */
384int tpm_get_desc(struct udevice *dev, char *buf, int size);
385
386/**
387 * tpm_xfer() - send data to the TPM and get response
388 *
389 * This first uses the device's send() method to send the bytes. Then it calls
390 * recv() to get the reply. If recv() returns -EAGAIN then it will delay a
391 * short time and then call recv() again.
392 *
393 * Regardless of whether recv() completes successfully, it will then call
394 * cleanup() to finish the transaction.
395 *
396 * Note that the outgoing data is inspected to determine command type
397 * (ordinal) and a timeout is used for that command type.
398 *
399 * @sendbuf - buffer of the data to send
400 * @send_size size of the data to send
401 * @recvbuf - memory to save the response to
402 * @recv_len - pointer to the size of the response buffer
403 *
404 * Returns 0 on success (and places the number of response bytes at
405 * recv_len) or -ve on failure.
406 */
407int tpm_xfer(struct udevice *dev, const uint8_t *sendbuf, size_t send_size,
408 uint8_t *recvbuf, size_t *recv_size);
409
Reinhard Pfaube6c1522013-06-26 15:55:13 +0200410/**
Che-liang Chiou8732b072013-02-28 09:34:57 +0000411 * Initialize TPM device. It must be called before any TPM commands.
Vadim Bendebury5e124722011-10-17 08:36:14 +0000412 *
Che-liang Chiou8732b072013-02-28 09:34:57 +0000413 * @return 0 on success, non-0 on error.
Vadim Bendebury5e124722011-10-17 08:36:14 +0000414 */
Simon Glassc8a8c512015-08-22 18:31:32 -0600415int tpm_init(void);
Vadim Bendebury5e124722011-10-17 08:36:14 +0000416
Che-liang Chiou8732b072013-02-28 09:34:57 +0000417/**
418 * Issue a TPM_Startup command.
Vadim Bendebury5e124722011-10-17 08:36:14 +0000419 *
Che-liang Chiou8732b072013-02-28 09:34:57 +0000420 * @param mode TPM startup mode
421 * @return return code of the operation
Vadim Bendebury5e124722011-10-17 08:36:14 +0000422 */
Che-liang Chiou8732b072013-02-28 09:34:57 +0000423uint32_t tpm_startup(enum tpm_startup_type mode);
Vadim Bendebury5e124722011-10-17 08:36:14 +0000424
Che-liang Chiou8732b072013-02-28 09:34:57 +0000425/**
426 * Issue a TPM_SelfTestFull command.
Vadim Bendebury5e124722011-10-17 08:36:14 +0000427 *
Che-liang Chiou8732b072013-02-28 09:34:57 +0000428 * @return return code of the operation
Vadim Bendebury5e124722011-10-17 08:36:14 +0000429 */
Che-liang Chiou8732b072013-02-28 09:34:57 +0000430uint32_t tpm_self_test_full(void);
Vadim Bendebury5e124722011-10-17 08:36:14 +0000431
Che-liang Chiou8732b072013-02-28 09:34:57 +0000432/**
433 * Issue a TPM_ContinueSelfTest command.
434 *
435 * @return return code of the operation
436 */
437uint32_t tpm_continue_self_test(void);
438
439/**
440 * Issue a TPM_NV_DefineSpace command. The implementation is limited
441 * to specify TPM_NV_ATTRIBUTES and size of the area. The area index
442 * could be one of the special value listed in enum tpm_nv_index.
443 *
444 * @param index index of the area
445 * @param perm TPM_NV_ATTRIBUTES of the area
446 * @param size size of the area
447 * @return return code of the operation
448 */
449uint32_t tpm_nv_define_space(uint32_t index, uint32_t perm, uint32_t size);
450
451/**
452 * Issue a TPM_NV_ReadValue command. This implementation is limited
453 * to read the area from offset 0. The area index could be one of
454 * the special value listed in enum tpm_nv_index.
455 *
456 * @param index index of the area
457 * @param data output buffer of the area contents
458 * @param count size of output buffer
459 * @return return code of the operation
460 */
461uint32_t tpm_nv_read_value(uint32_t index, void *data, uint32_t count);
462
463/**
464 * Issue a TPM_NV_WriteValue command. This implementation is limited
465 * to write the area from offset 0. The area index could be one of
466 * the special value listed in enum tpm_nv_index.
467 *
468 * @param index index of the area
469 * @param data input buffer to be wrote to the area
470 * @param length length of data bytes of input buffer
471 * @return return code of the operation
472 */
473uint32_t tpm_nv_write_value(uint32_t index, const void *data, uint32_t length);
474
475/**
476 * Issue a TPM_Extend command.
477 *
478 * @param index index of the PCR
479 * @param in_digest 160-bit value representing the event to be
480 * recorded
481 * @param out_digest 160-bit PCR value after execution of the
482 * command
483 * @return return code of the operation
484 */
485uint32_t tpm_extend(uint32_t index, const void *in_digest, void *out_digest);
486
487/**
488 * Issue a TPM_PCRRead command.
489 *
490 * @param index index of the PCR
491 * @param data output buffer for contents of the named PCR
492 * @param count size of output buffer
493 * @return return code of the operation
494 */
495uint32_t tpm_pcr_read(uint32_t index, void *data, size_t count);
496
497/**
498 * Issue a TSC_PhysicalPresence command. TPM physical presence flag
499 * is bit-wise OR'ed of flags listed in enum tpm_physical_presence.
500 *
501 * @param presence TPM physical presence flag
502 * @return return code of the operation
503 */
504uint32_t tpm_tsc_physical_presence(uint16_t presence);
505
506/**
507 * Issue a TPM_ReadPubek command.
508 *
509 * @param data output buffer for the public endorsement key
510 * @param count size of ouput buffer
511 * @return return code of the operation
512 */
513uint32_t tpm_read_pubek(void *data, size_t count);
514
515/**
516 * Issue a TPM_ForceClear command.
517 *
518 * @return return code of the operation
519 */
520uint32_t tpm_force_clear(void);
521
522/**
523 * Issue a TPM_PhysicalEnable command.
524 *
525 * @return return code of the operation
526 */
527uint32_t tpm_physical_enable(void);
528
529/**
530 * Issue a TPM_PhysicalDisable command.
531 *
532 * @return return code of the operation
533 */
534uint32_t tpm_physical_disable(void);
535
536/**
537 * Issue a TPM_PhysicalSetDeactivated command.
538 *
539 * @param state boolean state of the deactivated flag
540 * @return return code of the operation
541 */
542uint32_t tpm_physical_set_deactivated(uint8_t state);
543
544/**
545 * Issue a TPM_GetCapability command. This implementation is limited
546 * to query sub_cap index that is 4-byte wide.
547 *
548 * @param cap_area partition of capabilities
549 * @param sub_cap further definition of capability, which is
550 * limited to be 4-byte wide
551 * @param cap output buffer for capability information
552 * @param count size of ouput buffer
553 * @return return code of the operation
554 */
555uint32_t tpm_get_capability(uint32_t cap_area, uint32_t sub_cap,
556 void *cap, size_t count);
557
Reinhard Pfaube6c1522013-06-26 15:55:13 +0200558/**
559 * Issue a TPM_FlushSpecific command for a AUTH ressource.
560 *
561 * @param auth_handle handle of the auth session
562 * @return return code of the operation
563 */
564uint32_t tpm_terminate_auth_session(uint32_t auth_handle);
565
566/**
567 * Issue a TPM_OIAP command to setup an object independant authorization
568 * session.
569 * Information about the session is stored internally.
570 * If there was already an OIAP session active it is terminated and a new
571 * session is set up.
572 *
573 * @param auth_handle pointer to the (new) auth handle or NULL.
574 * @return return code of the operation
575 */
576uint32_t tpm_oiap(uint32_t *auth_handle);
577
578/**
579 * Ends an active OIAP session.
580 *
581 * @return return code of the operation
582 */
583uint32_t tpm_end_oiap(void);
584
585/**
586 * Issue a TPM_LoadKey2 (Auth1) command using an OIAP session for authenticating
587 * the usage of the parent key.
588 *
589 * @param parent_handle handle of the parent key.
590 * @param key pointer to the key structure (TPM_KEY or TPM_KEY12).
591 * @param key_length size of the key structure
592 * @param parent_key_usage_auth usage auth for the parent key
593 * @param key_handle pointer to the key handle
594 * @return return code of the operation
595 */
596uint32_t tpm_load_key2_oiap(uint32_t parent_handle,
597 const void *key, size_t key_length,
598 const void *parent_key_usage_auth,
599 uint32_t *key_handle);
600
601/**
602 * Issue a TPM_GetPubKey (Auth1) command using an OIAP session for
603 * authenticating the usage of the key.
604 *
605 * @param key_handle handle of the key
606 * @param usage_auth usage auth for the key
607 * @param pubkey pointer to the pub key buffer; may be NULL if the pubkey
608 * should not be stored.
609 * @param pubkey_len pointer to the pub key buffer len. On entry: the size of
610 * the provided pubkey buffer. On successful exit: the size
611 * of the stored TPM_PUBKEY structure (iff pubkey != NULL).
612 * @return return code of the operation
613 */
614uint32_t tpm_get_pub_key_oiap(uint32_t key_handle, const void *usage_auth,
615 void *pubkey, size_t *pubkey_len);
616
Simon Glass2132f972015-08-22 18:31:41 -0600617/**
618 * Get the TPM permanent flags value
619 *
620 * @param pflags Place to put permanent flags
621 * @return return code of the operation
622 */
623uint32_t tpm_get_permanent_flags(struct tpm_permanent_flags *pflags);
624
625/**
626 * Get the TPM permissions
627 *
628 * @param perm Returns permissions value
629 * @return return code of the operation
630 */
631uint32_t tpm_get_permissions(uint32_t index, uint32_t *perm);
632
Mario Six7690be32017-01-11 16:00:50 +0100633/**
634 * Flush a resource with a given handle and type from the TPM
635 *
636 * @param key_handle handle of the resource
637 * @param resource_type type of the resource
638 * @return return code of the operation
639 */
640uint32_t tpm_flush_specific(uint32_t key_handle, uint32_t resource_type);
641
Che-liang Chiou8732b072013-02-28 09:34:57 +0000642#endif /* __TPM_H */