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tpm_changeownerauth(8)					tpm_changeownerauth(8)

		     TPM Management - tpm_changeownerauth

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>

TPM Management			  2005-05-06		tpm_changeownerauth(8)

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