NAME

       tpm_changeownerauth - change the authorization data associated with the owner or SRK

SYNOPSIS

       tpm_changeownerauth [OPTION]

DESCRIPTION

       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

       SEE ALSO

       tpm_version(1), tpm_takeownership(8), tcsd(8)

REPORTING BUGS

       Report bugs to <trousers-users@lists.sourceforge.net>