[B<-hexdump>]
[B<-asn1parse>]
[B<-engine id>]
+[B<-engine_impl>]
=head1 DESCRIPTION
specifies the output filename to write to or standard output by
default.
+=item B<-sigfile file>
+
+Signature file, required for B<verify> operations only
+
=item B<-inkey file>
the input key file, by default it should be a private key.
=item B<-keyform PEM|DER|ENGINE>
-the key format PEM, DER or ENGINE.
+the key format PEM, DER or ENGINE. Default is PEM.
=item B<-passin arg>
=item B<-peerform PEM|DER|ENGINE>
-the peer key format PEM, DER or ENGINE.
-
-=item B<-engine id>
-
-specifying an engine (by its unique B<id> string) will cause B<pkeyutl>
-to attempt to obtain a functional reference to the specified engine,
-thus initialising it if needed. The engine will then be set as the default
-for all available algorithms.
-
+the peer key format PEM, DER or ENGINE. Default is PEM.
=item B<-pubin>
derive a shared secret using the peer key.
+=item B<-pkeyopt opt:value>
+
+Public key options specified as opt:value. See NOTES below for more details.
+
=item B<-hexdump>
hex dump the output data.
asn1parse the output data, this is useful when combined with the
B<-verifyrecover> option when an ASN1 structure is signed.
+=item B<-engine id>
+
+specifying an engine (by its unique B<id> string) will cause B<pkeyutl>
+to attempt to obtain a functional reference to the specified engine,
+thus initialising it if needed. The engine will then be set as the default
+for all available algorithms.
+
+=item B<-engine_impl>
+
+When used with the B<-engine> option, it specifies to also use
+engine B<id> for crypto operations.
+
+
=back
=head1 NOTES