1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Defines APIs and structures that allow software to interact with a
6 * Copyright (c) 2020 Linaro
7 * Copyright (c) 2018 Bootlin
9 * https://trustedcomputinggroup.org/resource/tss-overview-common-structures-specification/
11 * Author: Miquel Raynal <miquel.raynal@bootlin.com>
17 #include <tpm-common.h>
19 #define TPM2_DIGEST_LEN 32
21 #define TPM2_SHA1_DIGEST_SIZE 20
22 #define TPM2_SHA256_DIGEST_SIZE 32
23 #define TPM2_SHA384_DIGEST_SIZE 48
24 #define TPM2_SHA512_DIGEST_SIZE 64
25 #define TPM2_SM3_256_DIGEST_SIZE 32
27 #define TPM2_MAX_PCRS 32
28 #define TPM2_PCR_SELECT_MAX ((TPM2_MAX_PCRS + 7) / 8)
29 #define TPM2_MAX_CAP_BUFFER 1024
30 #define TPM2_MAX_TPM_PROPERTIES ((TPM2_MAX_CAP_BUFFER - sizeof(u32) /* TPM2_CAP */ - \
31 sizeof(u32)) / sizeof(struct tpms_tagged_property))
34 * We deviate from this draft of the specification by increasing the value of
35 * TPM2_NUM_PCR_BANKS from 3 to 16 to ensure compatibility with TPM2
36 * implementations that have enabled a larger than typical number of PCR
37 * banks. This larger value for TPM2_NUM_PCR_BANKS is expected to be included
38 * in a future revision of the specification.
40 #define TPM2_NUM_PCR_BANKS 16
42 /* Definition of (UINT32) TPM2_CAP Constants */
43 #define TPM2_CAP_PCRS 0x00000005U
44 #define TPM2_CAP_TPM_PROPERTIES 0x00000006U
46 /* Definition of (UINT32) TPM2_PT Constants */
47 #define TPM2_PT_GROUP (u32)(0x00000100)
48 #define TPM2_PT_FIXED (u32)(TPM2_PT_GROUP * 1)
49 #define TPM2_PT_MANUFACTURER (u32)(TPM2_PT_FIXED + 5)
50 #define TPM2_PT_PCR_COUNT (u32)(TPM2_PT_FIXED + 18)
51 #define TPM2_PT_MAX_COMMAND_SIZE (u32)(TPM2_PT_FIXED + 30)
52 #define TPM2_PT_MAX_RESPONSE_SIZE (u32)(TPM2_PT_FIXED + 31)
55 #define EV_POST_CODE ((u32)0x00000001)
56 #define EV_NO_ACTION ((u32)0x00000003)
57 #define EV_SEPARATOR ((u32)0x00000004)
58 #define EV_S_CRTM_CONTENTS ((u32)0x00000007)
59 #define EV_S_CRTM_VERSION ((u32)0x00000008)
60 #define EV_CPU_MICROCODE ((u32)0x00000009)
61 #define EV_TABLE_OF_DEVICES ((u32)0x0000000B)
63 /* TPMS_TAGGED_PROPERTY Structure */
64 struct tpms_tagged_property {
69 /* TPMS_PCR_SELECTION Structure */
70 struct tpms_pcr_selection {
73 u8 pcr_select[TPM2_PCR_SELECT_MAX];
76 /* TPML_PCR_SELECTION Structure */
77 struct tpml_pcr_selection {
79 struct tpms_pcr_selection selection[TPM2_NUM_PCR_BANKS];
82 /* TPML_TAGGED_TPM_PROPERTY Structure */
83 struct tpml_tagged_tpm_property {
85 struct tpms_tagged_property tpm_property[TPM2_MAX_TPM_PROPERTIES];
88 /* TPMU_CAPABILITIES Union */
89 union tpmu_capabilities {
91 * Non exhaustive. Only added the structs needed for our
94 struct tpml_pcr_selection assigned_pcr;
95 struct tpml_tagged_tpm_property tpm_properties;
98 /* TPMS_CAPABILITY_DATA Structure */
99 struct tpms_capability_data {
101 union tpmu_capabilities data;
105 * SHA1 Event Log Entry Format
107 * @pcr_index: PCRIndex event extended to
108 * @event_type: Type of event (see EFI specs)
109 * @digest: Value extended into PCR index
110 * @event_size: Size of event
113 struct tcg_pcr_event {
116 u8 digest[TPM2_SHA1_DIGEST_SIZE];
122 * Definition of TPMU_HA Union
125 u8 sha1[TPM2_SHA1_DIGEST_SIZE];
126 u8 sha256[TPM2_SHA256_DIGEST_SIZE];
127 u8 sm3_256[TPM2_SM3_256_DIGEST_SIZE];
128 u8 sha384[TPM2_SHA384_DIGEST_SIZE];
129 u8 sha512[TPM2_SHA512_DIGEST_SIZE];
133 * Definition of TPMT_HA Structure
135 * @hash_alg: Hash algorithm defined in enum tpm2_algorithms
136 * @digest: Digest value for a given algorithm
140 union tmpu_ha digest;
144 * Definition of TPML_DIGEST_VALUES Structure
146 * @count: Number of algorithms supported by hardware
147 * @digests: struct for algorithm id and hash value
149 struct tpml_digest_values {
151 struct tpmt_ha digests[TPM2_NUM_PCR_BANKS];
155 * Crypto Agile Log Entry Format
157 * @pcr_index: PCRIndex event extended to
158 * @event_type: Type of event
159 * @digests: List of digestsextended to PCR index
160 * @event_size: Size of the event data
163 struct tcg_pcr_event2 {
166 struct tpml_digest_values digests;
172 * TPM2 Structure Tags for command/response buffers.
174 * @TPM2_ST_NO_SESSIONS: the command does not need an authentication.
175 * @TPM2_ST_SESSIONS: the command needs an authentication.
177 enum tpm2_structures {
178 TPM2_ST_NO_SESSIONS = 0x8001,
179 TPM2_ST_SESSIONS = 0x8002,
183 * TPM2 type of boolean.
191 * TPM2 startup values.
193 * @TPM2_SU_CLEAR: reset the internal state.
194 * @TPM2_SU_STATE: restore saved state (if any).
196 enum tpm2_startup_types {
197 TPM2_SU_CLEAR = 0x0000,
198 TPM2_SU_STATE = 0x0001,
202 * TPM2 permanent handles.
204 * @TPM2_RH_OWNER: refers to the 'owner' hierarchy.
205 * @TPM2_RS_PW: indicates a password.
206 * @TPM2_RH_LOCKOUT: refers to the 'lockout' hierarchy.
207 * @TPM2_RH_ENDORSEMENT: refers to the 'endorsement' hierarchy.
208 * @TPM2_RH_PLATFORM: refers to the 'platform' hierarchy.
211 TPM2_RH_OWNER = 0x40000001,
212 TPM2_RS_PW = 0x40000009,
213 TPM2_RH_LOCKOUT = 0x4000000A,
214 TPM2_RH_ENDORSEMENT = 0x4000000B,
215 TPM2_RH_PLATFORM = 0x4000000C,
219 * TPM2 command codes used at the beginning of a buffer, gives the command.
221 * @TPM2_CC_STARTUP: TPM2_Startup().
222 * @TPM2_CC_SELF_TEST: TPM2_SelfTest().
223 * @TPM2_CC_CLEAR: TPM2_Clear().
224 * @TPM2_CC_CLEARCONTROL: TPM2_ClearControl().
225 * @TPM2_CC_HIERCHANGEAUTH: TPM2_HierarchyChangeAuth().
226 * @TPM2_CC_PCR_SETAUTHPOL: TPM2_PCR_SetAuthPolicy().
227 * @TPM2_CC_DAM_RESET: TPM2_DictionaryAttackLockReset().
228 * @TPM2_CC_DAM_PARAMETERS: TPM2_DictionaryAttackParameters().
229 * @TPM2_CC_GET_CAPABILITY: TPM2_GetCapibility().
230 * @TPM2_CC_GET_RANDOM: TPM2_GetRandom().
231 * @TPM2_CC_PCR_READ: TPM2_PCR_Read().
232 * @TPM2_CC_PCR_EXTEND: TPM2_PCR_Extend().
233 * @TPM2_CC_PCR_SETAUTHVAL: TPM2_PCR_SetAuthValue().
235 enum tpm2_command_codes {
236 TPM2_CC_STARTUP = 0x0144,
237 TPM2_CC_SELF_TEST = 0x0143,
238 TPM2_CC_CLEAR = 0x0126,
239 TPM2_CC_CLEARCONTROL = 0x0127,
240 TPM2_CC_HIERCHANGEAUTH = 0x0129,
241 TPM2_CC_PCR_SETAUTHPOL = 0x012C,
242 TPM2_CC_DAM_RESET = 0x0139,
243 TPM2_CC_DAM_PARAMETERS = 0x013A,
244 TPM2_CC_NV_READ = 0x014E,
245 TPM2_CC_GET_CAPABILITY = 0x017A,
246 TPM2_CC_GET_RANDOM = 0x017B,
247 TPM2_CC_PCR_READ = 0x017E,
248 TPM2_CC_PCR_EXTEND = 0x0182,
249 TPM2_CC_PCR_SETAUTHVAL = 0x0183,
255 enum tpm2_return_codes {
256 TPM2_RC_SUCCESS = 0x0000,
257 TPM2_RC_BAD_TAG = 0x001E,
258 TPM2_RC_FMT1 = 0x0080,
259 TPM2_RC_HASH = TPM2_RC_FMT1 + 0x0003,
260 TPM2_RC_VALUE = TPM2_RC_FMT1 + 0x0004,
261 TPM2_RC_SIZE = TPM2_RC_FMT1 + 0x0015,
262 TPM2_RC_BAD_AUTH = TPM2_RC_FMT1 + 0x0022,
263 TPM2_RC_HANDLE = TPM2_RC_FMT1 + 0x000B,
264 TPM2_RC_VER1 = 0x0100,
265 TPM2_RC_INITIALIZE = TPM2_RC_VER1 + 0x0000,
266 TPM2_RC_FAILURE = TPM2_RC_VER1 + 0x0001,
267 TPM2_RC_DISABLED = TPM2_RC_VER1 + 0x0020,
268 TPM2_RC_AUTH_MISSING = TPM2_RC_VER1 + 0x0025,
269 TPM2_RC_COMMAND_CODE = TPM2_RC_VER1 + 0x0043,
270 TPM2_RC_AUTHSIZE = TPM2_RC_VER1 + 0x0044,
271 TPM2_RC_AUTH_CONTEXT = TPM2_RC_VER1 + 0x0045,
272 TPM2_RC_NEEDS_TEST = TPM2_RC_VER1 + 0x0053,
273 TPM2_RC_WARN = 0x0900,
274 TPM2_RC_TESTING = TPM2_RC_WARN + 0x000A,
275 TPM2_RC_REFERENCE_H0 = TPM2_RC_WARN + 0x0010,
276 TPM2_RC_LOCKOUT = TPM2_RC_WARN + 0x0021,
282 enum tpm2_algorithms {
283 TPM2_ALG_SHA1 = 0x04,
285 TPM2_ALG_SHA256 = 0x0B,
286 TPM2_ALG_SHA384 = 0x0C,
287 TPM2_ALG_SHA512 = 0x0D,
288 TPM2_ALG_NULL = 0x10,
289 TPM2_ALG_SM3_256 = 0x12,
292 /* NV index attributes */
293 enum tpm_index_attrs {
294 TPMA_NV_PPWRITE = 1UL << 0,
295 TPMA_NV_OWNERWRITE = 1UL << 1,
296 TPMA_NV_AUTHWRITE = 1UL << 2,
297 TPMA_NV_POLICYWRITE = 1UL << 3,
298 TPMA_NV_COUNTER = 1UL << 4,
299 TPMA_NV_BITS = 1UL << 5,
300 TPMA_NV_EXTEND = 1UL << 6,
301 TPMA_NV_POLICY_DELETE = 1UL << 10,
302 TPMA_NV_WRITELOCKED = 1UL << 11,
303 TPMA_NV_WRITEALL = 1UL << 12,
304 TPMA_NV_WRITEDEFINE = 1UL << 13,
305 TPMA_NV_WRITE_STCLEAR = 1UL << 14,
306 TPMA_NV_GLOBALLOCK = 1UL << 15,
307 TPMA_NV_PPREAD = 1UL << 16,
308 TPMA_NV_OWNERREAD = 1UL << 17,
309 TPMA_NV_AUTHREAD = 1UL << 18,
310 TPMA_NV_POLICYREAD = 1UL << 19,
311 TPMA_NV_NO_DA = 1UL << 25,
312 TPMA_NV_ORDERLY = 1UL << 26,
313 TPMA_NV_CLEAR_STCLEAR = 1UL << 27,
314 TPMA_NV_READLOCKED = 1UL << 28,
315 TPMA_NV_WRITTEN = 1UL << 29,
316 TPMA_NV_PLATFORMCREATE = 1UL << 30,
317 TPMA_NV_READ_STCLEAR = 1UL << 31,
319 TPMA_NV_MASK_READ = TPMA_NV_PPREAD | TPMA_NV_OWNERREAD |
320 TPMA_NV_AUTHREAD | TPMA_NV_POLICYREAD,
321 TPMA_NV_MASK_WRITE = TPMA_NV_PPWRITE | TPMA_NV_OWNERWRITE |
322 TPMA_NV_AUTHWRITE | TPMA_NV_POLICYWRITE,
326 TPM_ACCESS_VALID = 1 << 7,
327 TPM_ACCESS_ACTIVE_LOCALITY = 1 << 5,
328 TPM_ACCESS_REQUEST_PENDING = 1 << 2,
329 TPM_ACCESS_REQUEST_USE = 1 << 1,
330 TPM_ACCESS_ESTABLISHMENT = 1 << 0,
334 TPM_STS_FAMILY_SHIFT = 26,
335 TPM_STS_FAMILY_MASK = 0x3 << TPM_STS_FAMILY_SHIFT,
336 TPM_STS_FAMILY_TPM2 = 1 << TPM_STS_FAMILY_SHIFT,
337 TPM_STS_RESE_TESTABLISMENT_BIT = 1 << 25,
338 TPM_STS_COMMAND_CANCEL = 1 << 24,
339 TPM_STS_BURST_COUNT_SHIFT = 8,
340 TPM_STS_BURST_COUNT_MASK = 0xffff << TPM_STS_BURST_COUNT_SHIFT,
341 TPM_STS_VALID = 1 << 7,
342 TPM_STS_COMMAND_READY = 1 << 6,
344 TPM_STS_DATA_AVAIL = 1 << 4,
345 TPM_STS_DATA_EXPECT = 1 << 3,
346 TPM_STS_SELF_TEST_DONE = 1 << 2,
347 TPM_STS_RESPONSE_RETRY = 1 << 1,
351 TPM_CMD_COUNT_OFFSET = 2,
352 TPM_CMD_ORDINAL_OFFSET = 6,
353 TPM_MAX_BUF_SIZE = 1260,
357 * Issue a TPM2_Startup command.
360 * @mode TPM startup mode
362 * @return code of the operation
364 u32 tpm2_startup(struct udevice *dev, enum tpm2_startup_types mode);
367 * Issue a TPM2_SelfTest command.
370 * @full_test Asking to perform all tests or only the untested ones
372 * @return code of the operation
374 u32 tpm2_self_test(struct udevice *dev, enum tpm2_yes_no full_test);
377 * Issue a TPM2_Clear command.
382 * @pw_sz Length of the password
384 * @return code of the operation
386 u32 tpm2_clear(struct udevice *dev, u32 handle, const char *pw,
387 const ssize_t pw_sz);
390 * Issue a TPM2_PCR_Extend command.
393 * @index Index of the PCR
394 * @algorithm Algorithm used, defined in 'enum tpm2_algorithms'
395 * @digest Value representing the event to be recorded
396 * @digest_len len of the hash
398 * @return code of the operation
400 u32 tpm2_pcr_extend(struct udevice *dev, u32 index, u32 algorithm,
401 const u8 *digest, u32 digest_len);
404 * Issue a TPM2_PCR_Read command.
407 * @idx Index of the PCR
408 * @idx_min_sz Minimum size in bytes of the pcrSelect array
409 * @data Output buffer for contents of the named PCR
410 * @updates Optional out parameter: number of updates for this PCR
412 * @return code of the operation
414 u32 tpm2_pcr_read(struct udevice *dev, u32 idx, unsigned int idx_min_sz,
415 void *data, unsigned int *updates);
418 * Issue a TPM2_GetCapability command. This implementation is limited
419 * to query property index that is 4-byte wide.
422 * @capability Partition of capabilities
423 * @property Further definition of capability, limited to be 4 bytes wide
424 * @buf Output buffer for capability information
425 * @prop_count Size of output buffer
427 * @return code of the operation
429 u32 tpm2_get_capability(struct udevice *dev, u32 capability, u32 property,
430 void *buf, size_t prop_count);
433 * Issue a TPM2_DictionaryAttackLockReset command.
437 * @pw_sz Length of the password
439 * @return code of the operation
441 u32 tpm2_dam_reset(struct udevice *dev, const char *pw, const ssize_t pw_sz);
444 * Issue a TPM2_DictionaryAttackParameters command.
448 * @pw_sz Length of the password
449 * @max_tries Count of authorizations before lockout
450 * @recovery_time Time before decrementation of the failure count
451 * @lockout_recovery Time to wait after a lockout
453 * @return code of the operation
455 u32 tpm2_dam_parameters(struct udevice *dev, const char *pw,
456 const ssize_t pw_sz, unsigned int max_tries,
457 unsigned int recovery_time,
458 unsigned int lockout_recovery);
461 * Issue a TPM2_HierarchyChangeAuth command.
465 * @newpw New password
466 * @newpw_sz Length of the new password
467 * @oldpw Old password
468 * @oldpw_sz Length of the old password
470 * @return code of the operation
472 int tpm2_change_auth(struct udevice *dev, u32 handle, const char *newpw,
473 const ssize_t newpw_sz, const char *oldpw,
474 const ssize_t oldpw_sz);
477 * Issue a TPM_PCR_SetAuthPolicy command.
480 * @pw Platform password
481 * @pw_sz Length of the password
482 * @index Index of the PCR
483 * @digest New key to access the PCR
485 * @return code of the operation
487 u32 tpm2_pcr_setauthpolicy(struct udevice *dev, const char *pw,
488 const ssize_t pw_sz, u32 index, const char *key);
491 * Issue a TPM_PCR_SetAuthValue command.
494 * @pw Platform password
495 * @pw_sz Length of the password
496 * @index Index of the PCR
497 * @digest New key to access the PCR
498 * @key_sz Length of the new key
500 * @return code of the operation
502 u32 tpm2_pcr_setauthvalue(struct udevice *dev, const char *pw,
503 const ssize_t pw_sz, u32 index, const char *key,
504 const ssize_t key_sz);
507 * Issue a TPM2_GetRandom command.
510 * @param data output buffer for the random bytes
511 * @param count size of output buffer
513 * @return return code of the operation
515 u32 tpm2_get_random(struct udevice *dev, void *data, u32 count);
517 #endif /* __TPM_V2_H */