tpm_setclearable(8)					      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)