The document of the local data migration of the important secrets that used to maintained by cryptohome.
Until M84, tpm manager only worked for TPM2.0 case. For TPM1.2 cryptohome used to maintain the following auth values instead of tpm_manager:
Starting M84, tpm manager is launched for TPM1.2 as well, and the secrets listed above are migrated to the same file where auth values were stored for TPM2.0, which is manipulated by the object LocalDataStore.
The term “local data” is used for consistency with the object name, which in cryptohome used to be “TPM status” referring to the same thing.
Since tpm manager works for TPM2.0 since ever, the local data migration is only applicable to TPM1.2. For TPM2.0, local data migration is a no-op.
