1tpm_setclearable(8) System Manager's Manual tpm_setclearable(8)
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5 TPM Management - tpm_setclearable
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8 tpm_setclearable - disable TPM clear operations
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11 tpm_setclearable [OPTION]
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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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60 tpm_version(1), tpm_takeownership(8), tpm_clear(8), tcsd(8)
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64 Report bugs to <trousers-users@lists.sourceforge.net>
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68TPM Management 2005-05-05 tpm_setclearable(8)