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1 TPM Management - tpm_changeownerauth
tpm_changeownerauth allows for changing the authorization data for the TPM owner or the TPM's Storage Root Key (via the TPM_ChangeAuthOwner API). This operation prompts for current password, followed by the new password and a confirmation of the new password. The --owner option changes the TPM owner password and --srk option changes the TPM's SRK password. The --well-known option is used when SRK or owner passwords need to be changed and current owner password is a secret of zeros, --set-well-known option changes current password to a secret of zeros, both options do not work by themselves, they must be used with --owner and --srk options to indicate which of these passwords will be changed.
-h, --help Display command usage info.
-v, --version Display command version info.
-l, --log [none|error|info|debug] Set logging level.
-u, --unicode Use TSS UNICODE encoding for passwords to comply with applications using TSS popup boxes
-o, --owner Change the authorization data for the TPM owner.
-s, --srk Change the authorization data for the TPM's Storage Root Key.
-g, --original_password_unicode Use TSS UNICODE encoding for original password to comply with applications using TSS popup boxes
-n, --new_password_unicode Use TSS UNICODE encoding for new password to comply with applications using TSS popup boxes
-z, --well-known Change password to a new one when current owner password is a secret of all zeros (20 bytes of zeros). It must be specified which password (owner, SRK or both) to change
-r, --set-well-known Change password to a secret of all zeros (20 bytes of zeros). It must be specified which password (owner, SRK or both) to change
tpm_version(1), tpm_takeownership(8), tcsd(8)