tpm_nvwrite writes data to an NVRAM area. The user must
provide the index of the NVRAM area as well as the data to write into the
NVRAM area. Optionally an offset into the NVRAM area can be given where the
writing of the data is to start. Similarly the use may provide the number of
bytes to write into the NVRAM area. Some NVRAM areas only allow write sizes
of zero, i.e., NVRAM area index 0. 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 (optional
parameter)
- 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 write to the NVRAM area. This parameter may be used
to truncating the data that are for example read from a file. 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 where to start writing. The parameter may
either be a decimal number or a hexadecimal number starting with
'0x'.
- -f, --filename (optional
parameter)
- The name of a file from which to read data and copy them into the NVRAM
area.
- -d, --data (optional
parameter)
- The data to write into the NVRAM area passed in the command line.
- -m, --fill-value (optional
parameter)
- The byte to fill the NVRAM area with.
Report bugs to <trousers-users@lists.sourceforge.net>