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.IX Title "Crypt::Perl::ECDSA::PublicKey 3"
.TH Crypt::Perl::ECDSA::PublicKey 3 "2018-07-21" "perl v5.30.3" "User Contributed Perl Documentation"
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.SH "NAME"
Crypt::Perl::ECDSA::PublicKey \- object representation of ECDSA public key
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&    #Use Parse.pm or a private key’s get_public_key()
\&    #rather #than instantiating this class directly.
\&
\&    #This works even if the object came from a key file that doesn’t
\&    #contain the curve name.
\&    $pbkey\->get_curve_name();
\&
\&    if ($payload > ($pbkey\->max_sign_bits() / 8)) {
\&        die "Payload too long!";
\&    }
\&
\&    $pbkey\->verify($payload, $sig) or die "Invalid signature!";
\&
\&    #For JSON Web Algorithms (JWT et al.), cf. RFC 7518 page 8
\&    #This verifies against the appropriate SHA digest rather than
\&    #against the original message.
\&    $pbkey\->verify_jwa($payload, $sig) or die "Invalid signature!";
\&
\&    #\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
\&
\&    #Includes “kty”, “crv”, “x”, and “y”.
\&    #Add in whatever else your application needs afterward.
\&    #
\&    #This will die() if you try to run it with a curve that
\&    #doesn’t have a known JWK “crv” value.
\&    #
\&    my $pub_jwk = $pbkey\->get_struct_for_public_jwk();
\&
\&    #Useful for JWTs
\&    my $jwt_alg = $pbkey\->get_jwa_alg();
.Ve
.SH "DISCUSSION"
.IX Header "DISCUSSION"
The \s-1SYNOPSIS\s0 above should be illustration enough of how to use this class.
.PP
Export methods (\s-1PEM, DER,\s0 etc.) are shown in Crypt::Perl::ECDSA.