tpm2_nvwrite.1.md 2.3 KB
% tpm2_nvwrite(1) tpm2-tools | General Commands Manual
NAME
tpm2_nvwrite(1) - Write data to a Non-Volatile (NV) index.
SYNOPSIS
tpm2_nvwrite [OPTIONS] [ARGUMENT]
DESCRIPTION
tpm2_nvwrite(1) - Write data specified via FILE to a Non-Volatile (NV) index. If FILE is not specified, it defaults to stdin. The index is specified as an argument and can be a raw handle or an offset value to the nv handle range "TPM2_HR_NV_INDEX".
OPTIONS
ARGUMENT=NUMBER
Specify the NV index to write to as an offset to the starting NV index range or an absolute index value. Example: tpm2_nvwrite 1 is same as tpm2_nvwrite 0x01000001
-i, --input=FILE:
Specifies the input file with data to write to NV.
-C, --hierarchy=OBJECT:
Specifies the hierarchy used to authorize. Supported options are:
- o for TPM_RH_OWNER
- p for TPM_RH_PLATFORM
<num>where a hierarchy handle or nv-index may be used.
When -C isn't explicitly passed the index handle will be used to authorize against the index. The index auth value is set via the -p option to tpm2_nvdefine(1).
-P, --auth=AUTH:
Specifies the authorization value for the hierarchy.
--offset=_NATURALNUMBER:
The offset within the NV index to start writing at.
--cphash=FILE
File path to record the hash of the command parameters. This is commonly termed as cpHash. NOTE: When this option is selected, The tool will not actually execute the command, it simply returns a cpHash.
References
context object format details the methods for specifying OBJECT.
authorization formatting details the methods for specifying AUTH.
common options collection of common options that provide information many users may expect.
common tcti options collection of options used to configure the various known TCTI modules.
EXAMPLES
Write the file nv.data to index 0x01000001
tpm2_nvdefine -Q 1 -C o -s 32 -a "ownerread|policywrite|ownerwrite"
echo "please123abc" > nv.test_w
tpm2_nvwrite -Q 1 -C o -i nv.test_w