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tpm_nvread(8) [centos man page]

tpm_nvread(8)															     tpm_nvread(8)

NAME
tpm_nvread SYNOPSIS
tpm_nvread [OPTIONS] DESCRIPTION
tpm_nvread reads data from an NVRAM area and either displays them or writes them into a file. The user must provide the index of the NVRAM area. If the user provided the number of bytes to read then this will be the maximum number of bytes that will be read from the NVRAM area, otherwise the whole NVRAM area will be read. Some NVRAM areas only allow read sizes of zero, i.e., NVRAM area with index 0. Optionally an offset into the NVRAM area can be given where the reading of the data is to start. If the NVRAM area has permission bits set that require owner or NVRAM area authentication, then the password must be provided via the password option. The following options are supported: -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 -z, --well-known Use a secret of all zeros (20 bytes of zeros) as either the NVRAM area or owner secret. -p, --password Depending on what type of authentication is required for the NVRAM area, this must either be the NVRAM area or owner password. A password may be directly provided for example by using '--password=password' or '-ppassword'. If no password is provided then the program will prompt the user for the password. -i, --index The index of the NVRAM area. The parameter may either be a decimal number or a hexadecimal number starting with '0x'. -s, --size The number of bytes to read from the NVRAM area. The parameter may either be a decimal number or a hexadecimal number starting with '0x'. -n, --offset (optional parameter) The offset into the NVRAM area from where to start reading. The parameter may either be a decimal number or a hexadecimal number starting with '0x'. -f, --filename (optional parameter) The name of a file the read data will be written into. If no filename is given the data will be printed to stdout. SEE ALSO
tpm_nvdefine(8), tpm_nvinfo(8), tpm_nvrelease(8), tpm_nvwrite(8) REPORTING BUGS
Report bugs to <trousers-users@lists.sourceforge.net> TPM Management 2011-07-11 tpm_nvread(8)

Check Out this Related Man Page

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)
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