csu3_am335x/EVSE/GPL/tpm2-tools-5.1/man/man1/tpm2_nvreadpublic.1

.\" Automatically generated by Pandoc 1.19.2.4
.\"
.TH "tpm2_nvreadpublic" "1" "" "tpm2\-tools" "General Commands Manual"
.hy
.SH NAME
.PP
\f[B]tpm2_nvreadpublic\f[](1) \- Display all defined Non\-Volatile (NV)s
indices.
.SH SYNOPSIS
.PP
\f[B]tpm2_nvreadpublic\f[] [\f[I]OPTIONS\f[]]
.SH DESCRIPTION
.PP
\f[B]tpm2_nvreadpublic\f[](1) \- Display all defined Non\-Volatile (NV)s
indices to stdout in a YAML format.
.PP
Display metadata for all defined NV indices.
Metadata includes:
.IP \[bu] 2
The size of the defined region.
.IP \[bu] 2
The hash algorithm used to compute the name of the index.
.IP \[bu] 2
The auth policy.
.IP \[bu] 2
The NV attributes as defined in section "NV Attributes".
.SS Example Output
.PP
``` 0x1500015: hash algorithm: friendly: sha256 value: 0xB attributes:
friendly: ownerwrite|ownerread value: 0x2000200 size: 32 authorization
policy:
.PP
0x1500017: hash algorithm: friendly: sha256 value: 0xB attributes:
friendly: ownerwrite|ownerread value: 0x2000200 size: 32 authorization
policy: ```
.SH OPTIONS
.PP
This tool takes no tool specific options.
.SH COMMON OPTIONS
.PP
This collection of options are common to many programs and provide
information that many users may expect.
.IP \[bu] 2
\f[B]\-h\f[], \f[B]\-\-help=[man|no\-man]\f[]: Display the tools
manpage.
By default, it attempts to invoke the manpager for the tool, however, on
failure will output a short tool summary.
This is the same behavior if the "man" option argument is specified,
however if explicit "man" is requested, the tool will provide errors
from man on stderr.
If the "no\-man" option if specified, or the manpager fails, the short
options will be output to stdout.
.RS 2
.PP
To successfully use the manpages feature requires the manpages to be
installed or on \f[I]MANPATH\f[], See man(1) for more details.
.RE
.IP \[bu] 2
\f[B]\-v\f[], \f[B]\-\-version\f[]: Display version information for this
tool, supported tctis and exit.
.IP \[bu] 2
\f[B]\-V\f[], \f[B]\-\-verbose\f[]: Increase the information that the
tool prints to the console during its execution.
When using this option the file and line number are printed.
.IP \[bu] 2
\f[B]\-Q\f[], \f[B]\-\-quiet\f[]: Silence normal tool output to stdout.
.IP \[bu] 2
\f[B]\-Z\f[], \f[B]\-\-enable\-errata\f[]: Enable the application of
errata fixups.
Useful if an errata fixup needs to be applied to commands sent to the
TPM.
Defining the environment TPM2TOOLS_ENABLE_ERRATA is equivalent.
.SH TCTI Configuration
.PP
The TCTI or "Transmission Interface" is the communication mechanism with
the TPM.
TCTIs can be changed for communication with TPMs across different
mediums.
.PP
To control the TCTI, the tools respect:
.IP "1." 3
The command line option \f[B]\-T\f[] or \f[B]\-\-tcti\f[]
.IP "2." 3
The environment variable: \f[I]TPM2TOOLS_TCTI\f[].
.PP
\f[B]Note:\f[] The command line option always overrides the environment
variable.
.PP
The current known TCTIs are:
.IP \[bu] 2
tabrmd \- The resource manager, called
tabrmd (https://github.com/tpm2-software/tpm2-abrmd).
Note that tabrmd and abrmd as a tcti name are synonymous.
.IP \[bu] 2
mssim \- Typically used for communicating to the TPM software simulator.
.IP \[bu] 2
device \- Used when talking directly to a TPM device file.
.IP \[bu] 2
none \- Do not initalize a connection with the TPM.
Some tools allow for off\-tpm options and thus support not using a TCTI.
Tools that do not support it will error when attempted to be used
without a TCTI connection.
Does not support \f[I]ANY\f[] options and \f[I]MUST BE\f[] presented as
the exact text of "none".
.PP
The arguments to either the command line option or the environment
variable are in the form:
.PP
\f[C]<tcti\-name>:<tcti\-option\-config>\f[]
.PP
Specifying an empty string for either the \f[C]<tcti\-name>\f[] or
\f[C]<tcti\-option\-config>\f[] results in the default being used for
that portion respectively.
.SS TCTI Defaults
.PP
When a TCTI is not specified, the default TCTI is searched for using
\f[I]dlopen(3)\f[] semantics.
The tools will search for \f[I]tabrmd\f[], \f[I]device\f[] and
\f[I]mssim\f[] TCTIs \f[B]IN THAT ORDER\f[] and \f[B]USE THE FIRST ONE
FOUND\f[].
You can query what TCTI will be chosen as the default by using the
\f[B]\-v\f[] option to print the version information.
The "default\-tcti" key\-value pair will indicate which of the
aforementioned TCTIs is the default.
.SS Custom TCTIs
.PP
Any TCTI that implements the dynamic TCTI interface can be loaded.
The tools internally use \f[I]dlopen(3)\f[], and the raw
\f[I]tcti\-name\f[] value is used for the lookup.
Thus, this could be a path to the shared library, or a library name as
understood by \f[I]dlopen(3)\f[] semantics.
.SH TCTI OPTIONS
.PP
This collection of options are used to configure the various known TCTI
modules available:
.IP \[bu] 2
\f[B]device\f[]: For the device TCTI, the TPM character device file for
use by the device TCTI can be specified.
The default is \f[I]/dev/tpm0\f[].
.RS 2
.PP
Example: \f[B]\-T device:/dev/tpm0\f[] or \f[B]export
\f[I]TPM2TOOLS_TCTI\f[]="device:/dev/tpm0"\f[]
.RE
.IP \[bu] 2
\f[B]mssim\f[]: For the mssim TCTI, the domain name or IP address and
port number used by the simulator can be specified.
The default are 127.0.0.1 and 2321.
.RS 2
.PP
Example: \f[B]\-T mssim:host=localhost,port=2321\f[] or \f[B]export
\f[I]TPM2TOOLS_TCTI\f[]="mssim:host=localhost,port=2321"\f[]
.RE
.IP \[bu] 2
\f[B]abrmd\f[]: For the abrmd TCTI, the configuration string format is a
series of simple key value pairs separated by a \[aq],\[aq] character.
Each key and value string are separated by a \[aq]=\[aq] character.
.RS 2
.IP \[bu] 2
TCTI abrmd supports two keys:
.RS 2
.IP "1." 3
\[aq]bus_name\[aq] : The name of the tabrmd service on the bus (a
string).
.IP "2." 3
\[aq]bus_type\[aq] : The type of the dbus instance (a string) limited to
\[aq]session\[aq] and \[aq]system\[aq].
.RE
.PP
Specify the tabrmd tcti name and a config string of
\f[C]bus_name=com.example.FooBar\f[]:
.PP
\f[C]\\\-\-tcti=tabrmd:bus_name=com.example.FooBar\f[]
.PP
Specify the default (abrmd) tcti and a config string of
\f[C]bus_type=session\f[]:
.PP
\f[C]\\\-\-tcti:bus_type=session\f[]
.PP
\f[B]NOTE\f[]: abrmd and tabrmd are synonymous.
.RE
.SH NV Attributes
.PP
NV Attributes are used to control various properties of the NV defined
space.
When specified as an option, either the raw bitfield mask or
"nice\-names" may be used.
The values can be found in Table 204 Part 2 of the TPM2.0 specification,
which can be found here:
.PP
<https://trustedcomputinggroup.org/wp-content/uploads/TPM-Rev-2.0-Part-2-Structures-01.38.pdf>
.PP
Nice names are calculated by taking the name field of table 204 and
removing the prefix \f[B]TPMA_NV_\f[] and lowercasing the result.
Thus, \f[B]TPMA_NV_PPWRITE\f[] becomes ppwrite.
Nice names can be joined using the bitwise or "|" symbol.
.PP
Note that the \f[B]TPM_NT\f[] field is 4 bits wide, and thus can be set
via \f[B]nt=\f[] format.
For instance, to set The fields \f[B]TPMA_NV_OWNERREAD\f[],
\f[B]TPMA_NV_OWNERWRITE\f[], \f[B]TPMA_NV_POLICYWRITE\f[], and
\f[B]TPMA_NT = 0x2\f[], the argument would be:
.PP
\f[B]ownerread|ownerwrite|policywrite|nt=0x2\f[]
.PP
Additionally, the NT field, which denotes the type of the NV index, can
also be specified via friendly names: * ordinary \- Ordinary contains
data that is opaque to the TPM that can only be modified using
TPM2_NV_Write.
* extend \- Extend is used similarly to a PCR and can only be modified
with TPM2_NV_Extend.
Its size is determined by the length of the hash algorithm used.
* counter \- Counter contains an 8\-octet value that is to be used as a
counter and can only be modified with TPM2_NV_Increment * bits \- Bit
Field contains an 8\-octet value to be used as a bit field and can only
be modified with TPM2_NV_SetBits.
* pinfail \- PIN Fail contains an 8\-octet pinCount that increments on a
PIN authorization failure and a pinLimit.
* pinpass \- PIN Pass contains an 8\-octet pinCount that increments on a
PIN authorization success and a pinLimit.
.PP
For instance, to set The fields \f[B]TPMA_NV_OWNERREAD\f[],
\f[B]TPMA_NV_OWNERWRITE\f[], \f[B]TPMA_NV_POLICYWRITE\f[], and
\f[B]TPMA_NT = bits\f[], the argument would be:
.PP
\f[B]ownerread|ownerwrite|policywrite|nt=bits\f[]
.SH EXAMPLES
.SS List the defined NV indices to stdout
.IP
.nf
\f[C]
tpm2_nvreadpublic
\f[]
.fi
.SH Returns
.PP
Tools can return any of the following codes:
.IP \[bu] 2
0 \- Success.
.IP \[bu] 2
1 \- General non\-specific error.
.IP \[bu] 2
2 \- Options handling error.
.IP \[bu] 2
3 \- Authentication error.
.IP \[bu] 2
4 \- TCTI related error.
.IP \[bu] 2
5 \- Non supported scheme.
Applicable to tpm2_testparams.
.SH BUGS
.PP
Github Issues (https://github.com/tpm2-software/tpm2-tools/issues)
.SH HELP
.PP
See the Mailing List (https://lists.01.org/mailman/listinfo/tpm2)