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.TH "tss2_exportkey" "1" "APRIL 2019" "tpm2-tools" "General Commands Manual"
.hy
.SH NAME
.PP
\f[B]tss2_exportkey\f[R](1) -
.SH SYNOPSIS
.PP
\f[B]tss2_exportkey\f[R] [\f[I]OPTIONS\f[R]]
.SH SEE ALSO
.PP
\f[B]fapi-config(5)\f[R] to adjust Fapi parameters like the used
cryptographic profile and TCTI or directories for the Fapi metadata
storages.
.PP
\f[B]fapi-profile(5)\f[R] to determine the cryptographic algorithms and
parameters for all keys and operations of a specific TPM interaction
like the name hash algorithm, the asymmetric signature algorithm, scheme
and parameters and PCR bank selection.
.SH DESCRIPTION
.PP
\f[B]tss2_exportkey\f[R](1) - This command will duplicate a key and
encrypt it using the public key of a new parent.
The exported data will contain the re-wrapped key pointed to by the
pathOfKeyToDuplicate and then the JSON encoded policy.
Encryption is done according to TPM encryption schemes specified in the
cryptographic profile (cf., \f[B]fapi-profile(5)\f[R]).
.SH OPTIONS
.PP
These are the available options:
.IP \[bu] 2
\f[B]-e\f[R] \f[B]--pathToPublicKeyOfNewParent\f[R]=\f[I]STRING\f[R]:
.RS 2
.PP
The path to the public key of the new parent.
This key MAY be in the public key hierarchy /ext.
Optional parameter.
If omitted only the public key will exported.
.RE
.IP \[bu] 2
\f[B]-f\f[R], \f[B]--force\f[R]:
.RS 2
.PP
Force overwriting the output file.
.RE
.IP \[bu] 2
\f[B]-o\f[R], \f[B]--exportedData\f[R]=\f[I]FILENAME\f[R] or \f[I]-\f[R]
(for stdout):
.RS 2
.PP
Returns the exported subtree.
.RE
.IP \[bu] 2
\f[B]-p\f[R], \f[B]--pathOfKeyToDuplicate\f[R]=\f[I]STRING\f[R]:
.RS 2
.PP
The path to the root of the subtree to export.
.RE
.SH COMMON OPTIONS
.PP
This collection of options are common to all tss2 programs and provide
information that many users may expect.
.IP \[bu] 2
\f[B]-h\f[R], \f[B]--help [man|no-man]\f[R]: 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 \[lq]man\[rq] option argument is
specified, however if explicit \[lq]man\[rq] is requested, the tool will
provide errors from man on stderr.
If the \[lq]no-man\[rq] 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[R], See \f[B]man\f[R](1) for more
details.
.RE
.IP \[bu] 2
\f[B]-v\f[R], \f[B]--version\f[R]: Display version information for this
tool, supported tctis and exit.
.SH EXAMPLE
.IP
.nf
\f[C]
tss2_exportkey --pathOfKeyToDuplicate=HS/SRK/myRSADecrypt --exportedData=exportedData.file
\f[R]
.fi
.SH RETURNS
.PP
0 on success or 1 on failure.
.SH BUGS
.PP
Github Issues (https://github.com/tpm2-software/tpm2-tools/issues)
.SH HELP
.PP
See the Mailing
List (https://lists.linuxfoundation.org/mailman/listinfo/tpm2)