1tpm_setclearable(8)         System Manager's Manual        tpm_setclearable(8)
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5                      TPM Management - tpm_setclearable
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NAME

8       tpm_setclearable - disable TPM clear operations
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SYNOPSIS

11       tpm_setclearable [OPTION]
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DESCRIPTION

15       tpm_setclearable reports the status of the TPM's flags regarding how
16       the TPM can be cleared.  This is the default behavior and also
17       accessible via the --status option. Requesting a report of this status
18       prompts for the owner password.  The --owner option requests that the
19       TPM disable clear operations (via the TPM_DisableOwnerClear API)
20       disabling the owner from clearing out the ownership information.  This
21       operation prompts for the owner password.  This operation is in effect
22       until the current owner is cleared.  The --force option (via the
23       TPM_DisableForceClear API) disables using Phyiscal Presence to
24       authorize a clear operation.  This operation does not require
25       authorization and will skip the owner password prompt.  This operation
26       is only in effect until a reboot.
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29       -h, --help
30              Display command usage info.
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32       -v, --version
33              Display command version info.
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35       -l, --log [none|error|info|debug]
36              Set logging level.
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38       -u, --unicode
39              Use TSS UNICODE encoding for passwords to comply with
40              applications using TSS popup boxes
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42       -s, --status
43              Report the status of flags regarding how the TPM can be cleared.
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45       -o, --owner
46              Disable use of owner authorization for authorizating a clear
47              operation until a new owner exists.
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49       -f, --force
50              Disable use of Physical Presence for authorizating a clear
51              operation until a reboot has occurred.
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53       -z, --well-known
54              Authenticate using 20 bytes of zeros as owner password (the
55              default TSS Well Known Secret), instead of prompting for an
56              owner password.
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SEE ALSO

60       tpm_version(1), tpm_takeownership(8), tpm_clear(8), tcsd(8)
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REPORTING BUGS

64       Report bugs to <trousers-users@lists.sourceforge.net>
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68TPM Management                    2005-05-05               tpm_setclearable(8)
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