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tpm_setclearable(8)    DragonFly System Manager's Manual   tpm_setclearable(8)

                      TPM Management - tpm_setclearable


NAME

       tpm_setclearable - disable TPM clear operations


SYNOPSIS

       tpm_setclearable [OPTION]


DESCRIPTION

       tpm_setclearable reports the status of the TPM's flags regarding how
       the TPM can be cleared.  This is the default behavior and also
       accessible via the --status option. Requesting a report of this status
       prompts for the owner password.  The --owner option requests that the
       TPM disable clear operations (via the TPM_DisableOwnerClear API)
       disabling the owner from clearing out the ownership information.  This
       operation prompts for the owner password.  This operation is in effect
       until the current owner is cleared.  The --force option (via the
       TPM_DisableForceClear API) disables using Phyiscal Presence to
       authorize a clear operation.  This operation does not require
       authorization and will skip the owner password prompt.  This operation
       is only in effect until a reboot.

       -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

       -s, --status
              Report the status of flags regarding how the TPM can be cleared.

       -o, --owner
              Disable use of owner authorization for authorizating a clear
              operation until a new owner exists.

       -f, --force
              Disable use of Physical Presence for authorizating a clear
              operation until a reboot has occurred.

       -z, --well-known
              Authenticate using 20 bytes of zeros as owner password (the
              default TSS Well Known Secret), instead of prompting for an
              owner password.


SEE ALSO

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


REPORTING BUGS

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

TPM Management                    2005-05-05               tpm_setclearable(8)

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