Perl Requires Chilkat v9.5.0.83+

Ed25519 Key Exchange (Shared Secret)

See more Ed25519 Examples

Demonstrates how to create an Ed25519 shared secret for use in key exchange. Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# Alice's private key, a:
#     77076d0a7318a57d3c16c17251b26645df4c2f87ebc0992ab177fba51db92c2a
# Alice's public key, X25519(a, 9):
#     8520f0098930a754748b7ddcb43ef75a0dbf3a0d26381af4eba4a98eaa9b4e6a
# Bob's private key, b:
#     5dab087e624a8a4b79e17f8b83800ee66f3bb1292618b6fd1c2f8b27ff88e0eb
# Bob's public key, X25519(b, 9):
#     de9edb7d7b7dc1b4d35b61c2ece435373f8343c85b78674dadfc7e146f882b4f
# Their shared secret, K:
#     4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742

my $alicePrivKey = '77076d0a7318a57d3c16c17251b26645df4c2f87ebc0992ab177fba51db92c2a';
my $bobPubKey = 'de9edb7d7b7dc1b4d35b61c2ece435373f8343c85b78674dadfc7e146f882b4f';

my $privKey = Chilkat2::PrivateKey->new;
# This example shows only one way of loading an Ed25519 private key.
# Chilkat can load other formats (JWK, PEM, ASN.1 DER, etc.)
# You may do so by calling LoadAnyFormat or LoadAnyFormatFile.
my $success = $privKey->LoadEd25519($alicePrivKey, '');
if (!$success) {
    print $privKey->LastErrorText, "\n";
    exit;
}

my $pubKey = Chilkat2::PublicKey->new;
$success = $pubKey->LoadEd25519($bobPubKey);
if (!$success) {
    print $pubKey->LastErrorText, "\n";
    exit;
}

# Create the shared secret:
my $eddsa = Chilkat2::EdDSA->new;
my $sharedSecret = $eddsa->SharedSecretENC($privKey, $pubKey, 'hexlower');
if (!$eddsa->LastMethodSuccess) {
    print $eddsa->LastErrorText, "\n";
    exit;
}

print 'Computed: ', $sharedSecret, "\n";
print "Expected: 4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742\n";