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TPM_MainInit write permanent state blob if SetState() blob was used

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If the permanent state was set using SetState() write the permanent
state once we successfully read the volatile state and can use it.
This way we have the state in a file.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
This commit is contained in:
Stefan Berger 2018-03-18 18:22:51 -04:00
parent 7bbb41a1fd
commit 8bedcb30cb
1 changed files with 10 additions and 0 deletions
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10
src/tpm12/tpm_init.c
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@ -104,6 +104,7 @@ TPM_RESULT TPM_MainInit(void)
TPM_RESULT testRc = 0; /* temporary place to hold common self tests failure before the tpm
state is created */
tpm_state_t *tpm_state; /* TPM instance state */
bool has_cached_state = false;
tpm_state = NULL; /* freed @1 */
/* preliminary check that platform specific sizes are correct */
@ -148,6 +149,8 @@ TPM_RESULT TPM_MainInit(void)
}
}
if (rc == 0) {
has_cached_state = HasCachedState(TPMLIB_STATE_PERMANENT);
/* record the TPM number in the state */
tpm_state->tpm_number = i;
/* If the instance exists in NVRAM, it it initialized and saved in the tpm_instances[]
@ -170,6 +173,13 @@ TPM_RESULT TPM_MainInit(void)
rc = TPM_VolatileAll_NVLoad(tpm_state);
}
#endif /* TPM_VOLATILE_LOAD */
/* libtpms: due to the SetState() API we have to write the permanent state back to
a file now */
if (rc == 0 && has_cached_state) {
rc = TPM_PermanentAll_NVStore(tpm_state,
TRUE, /* write NV */
0); /* no roll back */
}
/* if permanent state was loaded successfully (or stored successfully for TPM 0 the first
time) */
if (rc == 0) {