1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (c) 2018 Bootlin
4 * Author: Miquel Raynal <miquel.raynal@bootlin.com>
10 #include <tpm-common.h>
12 #define TPM2_DIGEST_LEN 32
15 * TPM2 Structure Tags for command/response buffers.
17 * @TPM2_ST_NO_SESSIONS: the command does not need an authentication.
18 * @TPM2_ST_SESSIONS: the command needs an authentication.
20 enum tpm2_structures {
21 TPM2_ST_NO_SESSIONS = 0x8001,
22 TPM2_ST_SESSIONS = 0x8002,
26 * TPM2 type of boolean.
34 * TPM2 startup values.
36 * @TPM2_SU_CLEAR: reset the internal state.
37 * @TPM2_SU_STATE: restore saved state (if any).
39 enum tpm2_startup_types {
40 TPM2_SU_CLEAR = 0x0000,
41 TPM2_SU_STATE = 0x0001,
45 * TPM2 permanent handles.
47 * @TPM2_RH_OWNER: refers to the 'owner' hierarchy.
48 * @TPM2_RS_PW: indicates a password.
49 * @TPM2_RH_LOCKOUT: refers to the 'lockout' hierarchy.
50 * @TPM2_RH_ENDORSEMENT: refers to the 'endorsement' hierarchy.
51 * @TPM2_RH_PLATFORM: refers to the 'platform' hierarchy.
54 TPM2_RH_OWNER = 0x40000001,
55 TPM2_RS_PW = 0x40000009,
56 TPM2_RH_LOCKOUT = 0x4000000A,
57 TPM2_RH_ENDORSEMENT = 0x4000000B,
58 TPM2_RH_PLATFORM = 0x4000000C,
62 * TPM2 command codes used at the beginning of a buffer, gives the command.
64 * @TPM2_CC_STARTUP: TPM2_Startup().
65 * @TPM2_CC_SELF_TEST: TPM2_SelfTest().
66 * @TPM2_CC_CLEAR: TPM2_Clear().
67 * @TPM2_CC_CLEARCONTROL: TPM2_ClearControl().
68 * @TPM2_CC_HIERCHANGEAUTH: TPM2_HierarchyChangeAuth().
69 * @TPM2_CC_PCR_SETAUTHPOL: TPM2_PCR_SetAuthPolicy().
70 * @TPM2_CC_DAM_RESET: TPM2_DictionaryAttackLockReset().
71 * @TPM2_CC_DAM_PARAMETERS: TPM2_DictionaryAttackParameters().
72 * @TPM2_CC_GET_CAPABILITY: TPM2_GetCapibility().
73 * @TPM2_CC_PCR_READ: TPM2_PCR_Read().
74 * @TPM2_CC_PCR_EXTEND: TPM2_PCR_Extend().
75 * @TPM2_CC_PCR_SETAUTHVAL: TPM2_PCR_SetAuthValue().
77 enum tpm2_command_codes {
78 TPM2_CC_STARTUP = 0x0144,
79 TPM2_CC_SELF_TEST = 0x0143,
80 TPM2_CC_CLEAR = 0x0126,
81 TPM2_CC_CLEARCONTROL = 0x0127,
82 TPM2_CC_HIERCHANGEAUTH = 0x0129,
83 TPM2_CC_PCR_SETAUTHPOL = 0x012C,
84 TPM2_CC_DAM_RESET = 0x0139,
85 TPM2_CC_DAM_PARAMETERS = 0x013A,
86 TPM2_CC_NV_READ = 0x014E,
87 TPM2_CC_GET_CAPABILITY = 0x017A,
88 TPM2_CC_PCR_READ = 0x017E,
89 TPM2_CC_PCR_EXTEND = 0x0182,
90 TPM2_CC_PCR_SETAUTHVAL = 0x0183,
96 enum tpm2_return_codes {
97 TPM2_RC_SUCCESS = 0x0000,
98 TPM2_RC_BAD_TAG = 0x001E,
99 TPM2_RC_FMT1 = 0x0080,
100 TPM2_RC_HASH = TPM2_RC_FMT1 + 0x0003,
101 TPM2_RC_VALUE = TPM2_RC_FMT1 + 0x0004,
102 TPM2_RC_SIZE = TPM2_RC_FMT1 + 0x0015,
103 TPM2_RC_BAD_AUTH = TPM2_RC_FMT1 + 0x0022,
104 TPM2_RC_HANDLE = TPM2_RC_FMT1 + 0x000B,
105 TPM2_RC_VER1 = 0x0100,
106 TPM2_RC_INITIALIZE = TPM2_RC_VER1 + 0x0000,
107 TPM2_RC_FAILURE = TPM2_RC_VER1 + 0x0001,
108 TPM2_RC_DISABLED = TPM2_RC_VER1 + 0x0020,
109 TPM2_RC_AUTH_MISSING = TPM2_RC_VER1 + 0x0025,
110 TPM2_RC_COMMAND_CODE = TPM2_RC_VER1 + 0x0043,
111 TPM2_RC_AUTHSIZE = TPM2_RC_VER1 + 0x0044,
112 TPM2_RC_AUTH_CONTEXT = TPM2_RC_VER1 + 0x0045,
113 TPM2_RC_NEEDS_TEST = TPM2_RC_VER1 + 0x0053,
114 TPM2_RC_WARN = 0x0900,
115 TPM2_RC_TESTING = TPM2_RC_WARN + 0x000A,
116 TPM2_RC_REFERENCE_H0 = TPM2_RC_WARN + 0x0010,
117 TPM2_RC_LOCKOUT = TPM2_RC_WARN + 0x0021,
123 enum tpm2_algorithms {
125 TPM2_ALG_SHA256 = 0x0B,
126 TPM2_ALG_SHA384 = 0x0C,
127 TPM2_ALG_SHA512 = 0x0D,
128 TPM2_ALG_NULL = 0x10,
132 * Issue a TPM2_Startup command.
134 * @mode TPM startup mode
136 * @return code of the operation
138 u32 tpm2_startup(enum tpm2_startup_types mode);
141 * Issue a TPM2_SelfTest command.
143 * @full_test Asking to perform all tests or only the untested ones
145 * @return code of the operation
147 u32 tpm2_self_test(enum tpm2_yes_no full_test);
150 * Issue a TPM2_Clear command.
154 * @pw_sz Length of the password
156 * @return code of the operation
158 u32 tpm2_clear(u32 handle, const char *pw, const ssize_t pw_sz);
161 * Issue a TPM2_PCR_Extend command.
163 * @index Index of the PCR
164 * @digest Value representing the event to be recorded
166 * @return code of the operation
168 u32 tpm2_pcr_extend(u32 index, const uint8_t *digest);
171 * Issue a TPM2_PCR_Read command.
173 * @idx Index of the PCR
174 * @idx_min_sz Minimum size in bytes of the pcrSelect array
175 * @data Output buffer for contents of the named PCR
176 * @updates Optional out parameter: number of updates for this PCR
178 * @return code of the operation
180 u32 tpm2_pcr_read(u32 idx, unsigned int idx_min_sz, void *data,
181 unsigned int *updates);
184 * Issue a TPM2_GetCapability command. This implementation is limited
185 * to query property index that is 4-byte wide.
187 * @capability Partition of capabilities
188 * @property Further definition of capability, limited to be 4 bytes wide
189 * @buf Output buffer for capability information
190 * @prop_count Size of output buffer
192 * @return code of the operation
194 u32 tpm2_get_capability(u32 capability, u32 property, void *buf,
198 * Issue a TPM2_DictionaryAttackLockReset command.
201 * @pw_sz Length of the password
203 * @return code of the operation
205 u32 tpm2_dam_reset(const char *pw, const ssize_t pw_sz);
208 * Issue a TPM2_DictionaryAttackParameters command.
211 * @pw_sz Length of the password
212 * @max_tries Count of authorizations before lockout
213 * @recovery_time Time before decrementation of the failure count
214 * @lockout_recovery Time to wait after a lockout
216 * @return code of the operation
218 u32 tpm2_dam_parameters(const char *pw, const ssize_t pw_sz,
219 unsigned int max_tries, unsigned int recovery_time,
220 unsigned int lockout_recovery);
223 * Issue a TPM2_HierarchyChangeAuth command.
226 * @newpw New password
227 * @newpw_sz Length of the new password
228 * @oldpw Old password
229 * @oldpw_sz Length of the old password
231 * @return code of the operation
233 int tpm2_change_auth(u32 handle, const char *newpw, const ssize_t newpw_sz,
234 const char *oldpw, const ssize_t oldpw_sz);
237 * Issue a TPM_PCR_SetAuthPolicy command.
239 * @pw Platform password
240 * @pw_sz Length of the password
241 * @index Index of the PCR
242 * @digest New key to access the PCR
244 * @return code of the operation
246 u32 tpm2_pcr_setauthpolicy(const char *pw, const ssize_t pw_sz, u32 index,
250 * Issue a TPM_PCR_SetAuthValue command.
252 * @pw Platform password
253 * @pw_sz Length of the password
254 * @index Index of the PCR
255 * @digest New key to access the PCR
256 * @key_sz Length of the new key
258 * @return code of the operation
260 u32 tpm2_pcr_setauthvalue(const char *pw, const ssize_t pw_sz, u32 index,
261 const char *key, const ssize_t key_sz);
263 #endif /* __TPM_V2_H */