PHP ActiveX

Load a Raw Ed25519 Public Key

Demonstrates the Chilkat PublicKey.LoadEd25519 method, which loads a raw Ed25519 public key from a hexadecimal string. The only argument must be exactly 64 hexadecimal characters (32 bytes).

Background: An Ed25519 public key is simply a fixed 32-byte value, so raw hex is a natural way to carry it — no ASN.1 container required. This loader takes those bytes directly, which is useful when a key comes from a system that emits raw values rather than a PEM or JWK. For a standard container, use LoadFromString or one of the DER/PEM loaders instead.

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<?php

$success = 0;

//  Demonstrates the PublicKey.LoadEd25519 method, which loads a raw Ed25519 public key from a
//  hexadecimal string.  The only argument must be exactly 64 hexadecimal characters (32 bytes).

$pubKey = new COM("Chilkat.PublicKey");

//  The 32-byte Ed25519 public key as 64 hex digits.
$pubKeyHex = 'd75a980182b10ab7d54bfed3c964073a0ee172f3daa62325af021a68f707511a';

$success = $pubKey->LoadEd25519($pubKeyHex);
if ($success == 0) {
    print $pubKey->LastErrorText . "\n";
    exit;
}

print 'Loaded an Ed25519 public key.' . "\n";

?>