home | help
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 op-
     erations (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 opera-
	    tion 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)

home | help