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>
21 #define TPM2_DIGEST_LEN 32
23 #define TPM2_SHA1_DIGEST_SIZE 20
24 #define TPM2_SHA256_DIGEST_SIZE 32
25 #define TPM2_SHA384_DIGEST_SIZE 48
26 #define TPM2_SHA512_DIGEST_SIZE 64
27 #define TPM2_SM3_256_DIGEST_SIZE 32
29 #define TPM2_MAX_PCRS 32
30 #define TPM2_PCR_SELECT_MAX ((TPM2_MAX_PCRS + 7) / 8)
31 #define TPM2_MAX_CAP_BUFFER 1024
32 #define TPM2_MAX_TPM_PROPERTIES ((TPM2_MAX_CAP_BUFFER - sizeof(u32) /* TPM2_CAP */ - \
33 sizeof(u32)) / sizeof(struct tpms_tagged_property))
35 #define TPM2_HDR_LEN 10
38 * We deviate from this draft of the specification by increasing the value of
39 * TPM2_NUM_PCR_BANKS from 3 to 16 to ensure compatibility with TPM2
40 * implementations that have enabled a larger than typical number of PCR
41 * banks. This larger value for TPM2_NUM_PCR_BANKS is expected to be included
42 * in a future revision of the specification.
44 #define TPM2_NUM_PCR_BANKS 16
46 /* Definition of (UINT32) TPM2_CAP Constants */
47 #define TPM2_CAP_PCRS 0x00000005U
48 #define TPM2_CAP_TPM_PROPERTIES 0x00000006U
50 /* Definition of (UINT32) TPM2_PT Constants */
51 #define TPM2_PT_GROUP (u32)(0x00000100)
52 #define TPM2_PT_FIXED (u32)(TPM2_PT_GROUP * 1)
53 #define TPM2_PT_MANUFACTURER (u32)(TPM2_PT_FIXED + 5)
54 #define TPM2_PT_PCR_COUNT (u32)(TPM2_PT_FIXED + 18)
55 #define TPM2_PT_MAX_COMMAND_SIZE (u32)(TPM2_PT_FIXED + 30)
56 #define TPM2_PT_MAX_RESPONSE_SIZE (u32)(TPM2_PT_FIXED + 31)
60 * "TCG Server Management Domain Firmware Profile Specification",
61 * rev 1.00, 2020-05-01
63 #define EV_POST_CODE ((u32)0x00000001)
64 #define EV_NO_ACTION ((u32)0x00000003)
65 #define EV_SEPARATOR ((u32)0x00000004)
66 #define EV_ACTION ((u32)0x00000005)
67 #define EV_TAG ((u32)0x00000006)
68 #define EV_S_CRTM_CONTENTS ((u32)0x00000007)
69 #define EV_S_CRTM_VERSION ((u32)0x00000008)
70 #define EV_CPU_MICROCODE ((u32)0x00000009)
71 #define EV_PLATFORM_CONFIG_FLAGS ((u32)0x0000000A)
72 #define EV_TABLE_OF_DEVICES ((u32)0x0000000B)
73 #define EV_COMPACT_HASH ((u32)0x0000000C)
77 * "TCG PC Client Platform Firmware Profile Specification", Family "2.0"
78 * Level 00 Version 1.05 Revision 23, May 7, 2021
80 #define EV_EFI_EVENT_BASE ((u32)0x80000000)
81 #define EV_EFI_VARIABLE_DRIVER_CONFIG ((u32)0x80000001)
82 #define EV_EFI_VARIABLE_BOOT ((u32)0x80000002)
83 #define EV_EFI_BOOT_SERVICES_APPLICATION ((u32)0x80000003)
84 #define EV_EFI_BOOT_SERVICES_DRIVER ((u32)0x80000004)
85 #define EV_EFI_RUNTIME_SERVICES_DRIVER ((u32)0x80000005)
86 #define EV_EFI_GPT_EVENT ((u32)0x80000006)
87 #define EV_EFI_ACTION ((u32)0x80000007)
88 #define EV_EFI_PLATFORM_FIRMWARE_BLOB ((u32)0x80000008)
89 #define EV_EFI_HANDOFF_TABLES ((u32)0x80000009)
90 #define EV_EFI_PLATFORM_FIRMWARE_BLOB2 ((u32)0x8000000A)
91 #define EV_EFI_HANDOFF_TABLES2 ((u32)0x8000000B)
92 #define EV_EFI_VARIABLE_BOOT2 ((u32)0x8000000C)
93 #define EV_EFI_HCRTM_EVENT ((u32)0x80000010)
94 #define EV_EFI_VARIABLE_AUTHORITY ((u32)0x800000E0)
95 #define EV_EFI_SPDM_FIRMWARE_BLOB ((u32)0x800000E1)
96 #define EV_EFI_SPDM_FIRMWARE_CONFIG ((u32)0x800000E2)
98 #define EFI_CALLING_EFI_APPLICATION \
99 "Calling EFI Application from Boot Option"
100 #define EFI_RETURNING_FROM_EFI_APPLICATION \
101 "Returning from EFI Application from Boot Option"
102 #define EFI_EXIT_BOOT_SERVICES_INVOCATION \
103 "Exit Boot Services Invocation"
104 #define EFI_EXIT_BOOT_SERVICES_FAILED \
105 "Exit Boot Services Returned with Failure"
106 #define EFI_EXIT_BOOT_SERVICES_SUCCEEDED \
107 "Exit Boot Services Returned with Success"
109 /* TPMS_TAGGED_PROPERTY Structure */
110 struct tpms_tagged_property {
115 /* TPMS_PCR_SELECTION Structure */
116 struct tpms_pcr_selection {
119 u8 pcr_select[TPM2_PCR_SELECT_MAX];
122 /* TPML_PCR_SELECTION Structure */
123 struct tpml_pcr_selection {
125 struct tpms_pcr_selection selection[TPM2_NUM_PCR_BANKS];
128 /* TPML_TAGGED_TPM_PROPERTY Structure */
129 struct tpml_tagged_tpm_property {
131 struct tpms_tagged_property tpm_property[TPM2_MAX_TPM_PROPERTIES];
134 /* TPMU_CAPABILITIES Union */
135 union tpmu_capabilities {
137 * Non exhaustive. Only added the structs needed for our
140 struct tpml_pcr_selection assigned_pcr;
141 struct tpml_tagged_tpm_property tpm_properties;
144 /* TPMS_CAPABILITY_DATA Structure */
145 struct tpms_capability_data {
147 union tpmu_capabilities data;
151 * SHA1 Event Log Entry Format
153 * @pcr_index: PCRIndex event extended to
154 * @event_type: Type of event (see EFI specs)
155 * @digest: Value extended into PCR index
156 * @event_size: Size of event
159 struct tcg_pcr_event {
162 u8 digest[TPM2_SHA1_DIGEST_SIZE];
168 * Definition of TPMU_HA Union
171 u8 sha1[TPM2_SHA1_DIGEST_SIZE];
172 u8 sha256[TPM2_SHA256_DIGEST_SIZE];
173 u8 sm3_256[TPM2_SM3_256_DIGEST_SIZE];
174 u8 sha384[TPM2_SHA384_DIGEST_SIZE];
175 u8 sha512[TPM2_SHA512_DIGEST_SIZE];
179 * Definition of TPMT_HA Structure
181 * @hash_alg: Hash algorithm defined in enum tpm2_algorithms
182 * @digest: Digest value for a given algorithm
186 union tmpu_ha digest;
190 * Definition of TPML_DIGEST_VALUES Structure
192 * @count: Number of algorithms supported by hardware
193 * @digests: struct for algorithm id and hash value
195 struct tpml_digest_values {
197 struct tpmt_ha digests[TPM2_NUM_PCR_BANKS];
201 * Crypto Agile Log Entry Format
203 * @pcr_index: PCRIndex event extended to
204 * @event_type: Type of event
205 * @digests: List of digestsextended to PCR index
206 * @event_size: Size of the event data
209 struct tcg_pcr_event2 {
212 struct tpml_digest_values digests;
218 * TPM2 Structure Tags for command/response buffers.
220 * @TPM2_ST_NO_SESSIONS: the command does not need an authentication.
221 * @TPM2_ST_SESSIONS: the command needs an authentication.
223 enum tpm2_structures {
224 TPM2_ST_NO_SESSIONS = 0x8001,
225 TPM2_ST_SESSIONS = 0x8002,
229 * TPM2 type of boolean.
237 * TPM2 startup values.
239 * @TPM2_SU_CLEAR: reset the internal state.
240 * @TPM2_SU_STATE: restore saved state (if any).
242 enum tpm2_startup_types {
243 TPM2_SU_CLEAR = 0x0000,
244 TPM2_SU_STATE = 0x0001,
248 * TPM2 permanent handles.
250 * @TPM2_RH_OWNER: refers to the 'owner' hierarchy.
251 * @TPM2_RS_PW: indicates a password.
252 * @TPM2_RH_LOCKOUT: refers to the 'lockout' hierarchy.
253 * @TPM2_RH_ENDORSEMENT: refers to the 'endorsement' hierarchy.
254 * @TPM2_RH_PLATFORM: refers to the 'platform' hierarchy.
257 TPM2_RH_OWNER = 0x40000001,
258 TPM2_RS_PW = 0x40000009,
259 TPM2_RH_LOCKOUT = 0x4000000A,
260 TPM2_RH_ENDORSEMENT = 0x4000000B,
261 TPM2_RH_PLATFORM = 0x4000000C,
265 * TPM2 command codes used at the beginning of a buffer, gives the command.
267 * @TPM2_CC_STARTUP: TPM2_Startup().
268 * @TPM2_CC_SELF_TEST: TPM2_SelfTest().
269 * @TPM2_CC_CLEAR: TPM2_Clear().
270 * @TPM2_CC_CLEARCONTROL: TPM2_ClearControl().
271 * @TPM2_CC_HIERCHANGEAUTH: TPM2_HierarchyChangeAuth().
272 * @TPM2_CC_PCR_SETAUTHPOL: TPM2_PCR_SetAuthPolicy().
273 * @TPM2_CC_DAM_RESET: TPM2_DictionaryAttackLockReset().
274 * @TPM2_CC_DAM_PARAMETERS: TPM2_DictionaryAttackParameters().
275 * @TPM2_CC_GET_CAPABILITY: TPM2_GetCapibility().
276 * @TPM2_CC_GET_RANDOM: TPM2_GetRandom().
277 * @TPM2_CC_PCR_READ: TPM2_PCR_Read().
278 * @TPM2_CC_PCR_EXTEND: TPM2_PCR_Extend().
279 * @TPM2_CC_PCR_SETAUTHVAL: TPM2_PCR_SetAuthValue().
281 enum tpm2_command_codes {
282 TPM2_CC_STARTUP = 0x0144,
283 TPM2_CC_SELF_TEST = 0x0143,
284 TPM2_CC_HIER_CONTROL = 0x0121,
285 TPM2_CC_CLEAR = 0x0126,
286 TPM2_CC_CLEARCONTROL = 0x0127,
287 TPM2_CC_HIERCHANGEAUTH = 0x0129,
288 TPM2_CC_NV_DEFINE_SPACE = 0x012a,
289 TPM2_CC_PCR_SETAUTHPOL = 0x012C,
290 TPM2_CC_NV_WRITE = 0x0137,
291 TPM2_CC_NV_WRITELOCK = 0x0138,
292 TPM2_CC_DAM_RESET = 0x0139,
293 TPM2_CC_DAM_PARAMETERS = 0x013A,
294 TPM2_CC_NV_READ = 0x014E,
295 TPM2_CC_GET_CAPABILITY = 0x017A,
296 TPM2_CC_GET_RANDOM = 0x017B,
297 TPM2_CC_PCR_READ = 0x017E,
298 TPM2_CC_PCR_EXTEND = 0x0182,
299 TPM2_CC_PCR_SETAUTHVAL = 0x0183,
305 enum tpm2_return_codes {
306 TPM2_RC_SUCCESS = 0x0000,
307 TPM2_RC_BAD_TAG = 0x001E,
308 TPM2_RC_FMT1 = 0x0080,
309 TPM2_RC_HASH = TPM2_RC_FMT1 + 0x0003,
310 TPM2_RC_VALUE = TPM2_RC_FMT1 + 0x0004,
311 TPM2_RC_SIZE = TPM2_RC_FMT1 + 0x0015,
312 TPM2_RC_BAD_AUTH = TPM2_RC_FMT1 + 0x0022,
313 TPM2_RC_HANDLE = TPM2_RC_FMT1 + 0x000B,
314 TPM2_RC_VER1 = 0x0100,
315 TPM2_RC_INITIALIZE = TPM2_RC_VER1 + 0x0000,
316 TPM2_RC_FAILURE = TPM2_RC_VER1 + 0x0001,
317 TPM2_RC_DISABLED = TPM2_RC_VER1 + 0x0020,
318 TPM2_RC_AUTH_MISSING = TPM2_RC_VER1 + 0x0025,
319 TPM2_RC_COMMAND_CODE = TPM2_RC_VER1 + 0x0043,
320 TPM2_RC_AUTHSIZE = TPM2_RC_VER1 + 0x0044,
321 TPM2_RC_AUTH_CONTEXT = TPM2_RC_VER1 + 0x0045,
322 TPM2_RC_NV_DEFINED = TPM2_RC_VER1 + 0x004c,
323 TPM2_RC_NEEDS_TEST = TPM2_RC_VER1 + 0x0053,
324 TPM2_RC_WARN = 0x0900,
325 TPM2_RC_TESTING = TPM2_RC_WARN + 0x000A,
326 TPM2_RC_REFERENCE_H0 = TPM2_RC_WARN + 0x0010,
327 TPM2_RC_LOCKOUT = TPM2_RC_WARN + 0x0021,
333 enum tpm2_algorithms {
334 TPM2_ALG_SHA1 = 0x04,
336 TPM2_ALG_SHA256 = 0x0B,
337 TPM2_ALG_SHA384 = 0x0C,
338 TPM2_ALG_SHA512 = 0x0D,
339 TPM2_ALG_NULL = 0x10,
340 TPM2_ALG_SM3_256 = 0x12,
343 /* NV index attributes */
344 enum tpm_index_attrs {
345 TPMA_NV_PPWRITE = 1UL << 0,
346 TPMA_NV_OWNERWRITE = 1UL << 1,
347 TPMA_NV_AUTHWRITE = 1UL << 2,
348 TPMA_NV_POLICYWRITE = 1UL << 3,
349 TPMA_NV_COUNTER = 1UL << 4,
350 TPMA_NV_BITS = 1UL << 5,
351 TPMA_NV_EXTEND = 1UL << 6,
352 TPMA_NV_POLICY_DELETE = 1UL << 10,
353 TPMA_NV_WRITELOCKED = 1UL << 11,
354 TPMA_NV_WRITEALL = 1UL << 12,
355 TPMA_NV_WRITEDEFINE = 1UL << 13,
356 TPMA_NV_WRITE_STCLEAR = 1UL << 14,
357 TPMA_NV_GLOBALLOCK = 1UL << 15,
358 TPMA_NV_PPREAD = 1UL << 16,
359 TPMA_NV_OWNERREAD = 1UL << 17,
360 TPMA_NV_AUTHREAD = 1UL << 18,
361 TPMA_NV_POLICYREAD = 1UL << 19,
362 TPMA_NV_NO_DA = 1UL << 25,
363 TPMA_NV_ORDERLY = 1UL << 26,
364 TPMA_NV_CLEAR_STCLEAR = 1UL << 27,
365 TPMA_NV_READLOCKED = 1UL << 28,
366 TPMA_NV_WRITTEN = 1UL << 29,
367 TPMA_NV_PLATFORMCREATE = 1UL << 30,
368 TPMA_NV_READ_STCLEAR = 1UL << 31,
370 TPMA_NV_MASK_READ = TPMA_NV_PPREAD | TPMA_NV_OWNERREAD |
371 TPMA_NV_AUTHREAD | TPMA_NV_POLICYREAD,
372 TPMA_NV_MASK_WRITE = TPMA_NV_PPWRITE | TPMA_NV_OWNERWRITE |
373 TPMA_NV_AUTHWRITE | TPMA_NV_POLICYWRITE,
377 TPM_ACCESS_VALID = 1 << 7,
378 TPM_ACCESS_ACTIVE_LOCALITY = 1 << 5,
379 TPM_ACCESS_REQUEST_PENDING = 1 << 2,
380 TPM_ACCESS_REQUEST_USE = 1 << 1,
381 TPM_ACCESS_ESTABLISHMENT = 1 << 0,
385 TPM_STS_FAMILY_SHIFT = 26,
386 TPM_STS_FAMILY_MASK = 0x3 << TPM_STS_FAMILY_SHIFT,
387 TPM_STS_FAMILY_TPM2 = 1 << TPM_STS_FAMILY_SHIFT,
388 TPM_STS_RESE_TESTABLISMENT_BIT = 1 << 25,
389 TPM_STS_COMMAND_CANCEL = 1 << 24,
390 TPM_STS_BURST_COUNT_SHIFT = 8,
391 TPM_STS_BURST_COUNT_MASK = 0xffff << TPM_STS_BURST_COUNT_SHIFT,
392 TPM_STS_VALID = 1 << 7,
393 TPM_STS_COMMAND_READY = 1 << 6,
395 TPM_STS_DATA_AVAIL = 1 << 4,
396 TPM_STS_DATA_EXPECT = 1 << 3,
397 TPM_STS_SELF_TEST_DONE = 1 << 2,
398 TPM_STS_RESPONSE_RETRY = 1 << 1,
399 TPM_STS_READ_ZERO = 0x23
403 TPM_CMD_COUNT_OFFSET = 2,
404 TPM_CMD_ORDINAL_OFFSET = 6,
405 TPM_MAX_BUF_SIZE = 1260,
409 /* Secure storage for firmware settings */
413 TPM_HT_POLICY_SESSION,
416 HR_PCR = TPM_HT_PCR << HR_SHIFT,
417 HR_HMAC_SESSION = TPM_HT_HMAC_SESSION << HR_SHIFT,
418 HR_POLICY_SESSION = TPM_HT_POLICY_SESSION << HR_SHIFT,
419 HR_NV_INDEX = TPM_HT_NV_INDEX << HR_SHIFT,
423 * Issue a TPM2_Startup command.
426 * @mode TPM startup mode
428 * Return: code of the operation
430 u32 tpm2_startup(struct udevice *dev, enum tpm2_startup_types mode);
433 * Issue a TPM2_SelfTest command.
436 * @full_test Asking to perform all tests or only the untested ones
438 * Return: code of the operation
440 u32 tpm2_self_test(struct udevice *dev, enum tpm2_yes_no full_test);
443 * Issue a TPM2_Clear command.
448 * @pw_sz Length of the password
450 * Return: code of the operation
452 u32 tpm2_clear(struct udevice *dev, u32 handle, const char *pw,
453 const ssize_t pw_sz);
456 * Issue a TPM_NV_DefineSpace command
458 * This allows a space to be defined with given attributes and policy
461 * @space_index index of the area
462 * @space_size size of area in bytes
463 * @nv_attributes TPM_NV_ATTRIBUTES of the area
464 * @nv_policy policy to use
465 * @nv_policy_size size of the policy
466 * Return: return code of the operation
468 u32 tpm2_nv_define_space(struct udevice *dev, u32 space_index,
469 size_t space_size, u32 nv_attributes,
470 const u8 *nv_policy, size_t nv_policy_size);
473 * Issue a TPM2_PCR_Extend command.
476 * @index Index of the PCR
477 * @algorithm Algorithm used, defined in 'enum tpm2_algorithms'
478 * @digest Value representing the event to be recorded
479 * @digest_len len of the hash
481 * Return: code of the operation
483 u32 tpm2_pcr_extend(struct udevice *dev, u32 index, u32 algorithm,
484 const u8 *digest, u32 digest_len);
487 * Read data from the secure storage
490 * @index Index of data to read
491 * @data Place to put data
492 * @count Number of bytes of data
493 * Return: code of the operation
495 u32 tpm2_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count);
498 * Write data to the secure storage
501 * @index Index of data to write
502 * @data Data to write
503 * @count Number of bytes of data
504 * Return: code of the operation
506 u32 tpm2_nv_write_value(struct udevice *dev, u32 index, const void *data,
510 * Issue a TPM2_PCR_Read command.
513 * @idx Index of the PCR
514 * @idx_min_sz Minimum size in bytes of the pcrSelect array
515 * @algorithm Algorithm used, defined in 'enum tpm2_algorithms'
516 * @data Output buffer for contents of the named PCR
517 * @digest_len len of the data
518 * @updates Optional out parameter: number of updates for this PCR
520 * Return: code of the operation
522 u32 tpm2_pcr_read(struct udevice *dev, u32 idx, unsigned int idx_min_sz,
523 u16 algorithm, void *data, u32 digest_len,
524 unsigned int *updates);
527 * Issue a TPM2_GetCapability command. This implementation is limited
528 * to query property index that is 4-byte wide.
531 * @capability Partition of capabilities
532 * @property Further definition of capability, limited to be 4 bytes wide
533 * @buf Output buffer for capability information
534 * @prop_count Size of output buffer
536 * Return: code of the operation
538 u32 tpm2_get_capability(struct udevice *dev, u32 capability, u32 property,
539 void *buf, size_t prop_count);
542 * Issue a TPM2_DictionaryAttackLockReset command.
546 * @pw_sz Length of the password
548 * Return: code of the operation
550 u32 tpm2_dam_reset(struct udevice *dev, const char *pw, const ssize_t pw_sz);
553 * Issue a TPM2_DictionaryAttackParameters command.
557 * @pw_sz Length of the password
558 * @max_tries Count of authorizations before lockout
559 * @recovery_time Time before decrementation of the failure count
560 * @lockout_recovery Time to wait after a lockout
562 * Return: code of the operation
564 u32 tpm2_dam_parameters(struct udevice *dev, const char *pw,
565 const ssize_t pw_sz, unsigned int max_tries,
566 unsigned int recovery_time,
567 unsigned int lockout_recovery);
570 * Issue a TPM2_HierarchyChangeAuth command.
574 * @newpw New password
575 * @newpw_sz Length of the new password
576 * @oldpw Old password
577 * @oldpw_sz Length of the old password
579 * Return: code of the operation
581 int tpm2_change_auth(struct udevice *dev, u32 handle, const char *newpw,
582 const ssize_t newpw_sz, const char *oldpw,
583 const ssize_t oldpw_sz);
586 * Issue a TPM_PCR_SetAuthPolicy command.
589 * @pw Platform password
590 * @pw_sz Length of the password
591 * @index Index of the PCR
592 * @digest New key to access the PCR
594 * Return: code of the operation
596 u32 tpm2_pcr_setauthpolicy(struct udevice *dev, const char *pw,
597 const ssize_t pw_sz, u32 index, const char *key);
600 * Issue a TPM_PCR_SetAuthValue command.
603 * @pw Platform password
604 * @pw_sz Length of the password
605 * @index Index of the PCR
606 * @digest New key to access the PCR
607 * @key_sz Length of the new key
609 * Return: code of the operation
611 u32 tpm2_pcr_setauthvalue(struct udevice *dev, const char *pw,
612 const ssize_t pw_sz, u32 index, const char *key,
613 const ssize_t key_sz);
616 * Issue a TPM2_GetRandom command.
619 * @param data output buffer for the random bytes
620 * @param count size of output buffer
622 * Return: return code of the operation
624 u32 tpm2_get_random(struct udevice *dev, void *data, u32 count);
627 * Lock data in the TPM
629 * Once locked the data cannot be written until after a reboot
632 * @index Index of data to lock
633 * Return: code of the operation
635 u32 tpm2_write_lock(struct udevice *dev, u32 index);
638 * Disable access to any platform data
640 * This can be called to close off access to the firmware data in the data,
641 * before calling the kernel.
644 * Return: code of the operation
646 u32 tpm2_disable_platform_hierarchy(struct udevice *dev);
649 * submit user specified data to the TPM and get response
652 * @sendbuf: Buffer of the data to send
653 * @recvbuf: Buffer to save the response to
654 * @recv_size: Pointer to the size of the response buffer
656 * Return: code of the operation
658 u32 tpm2_submit_command(struct udevice *dev, const u8 *sendbuf,
659 u8 *recvbuf, size_t *recv_size);
661 #endif /* __TPM_V2_H */