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(PHP ActiveX) Ed25519 Key Exchange (Shared Secret)Demonstrates how to create an Ed25519 shared secret for use in key exchange. Note: This example requires Chilkat v9.5.0.83 or greater.
<?php // 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 $alicePrivKey = '77076d0a7318a57d3c16c17251b26645df4c2f87ebc0992ab177fba51db92c2a'; $bobPubKey = 'de9edb7d7b7dc1b4d35b61c2ece435373f8343c85b78674dadfc7e146f882b4f'; // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PrivateKey') $privKey = new COM("Chilkat.PrivateKey"); // 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. $success = $privKey->LoadEd25519($alicePrivKey,''); if ($success == 0) { print $privKey->LastErrorText . "\n"; exit; } // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PublicKey') $pubKey = new COM("Chilkat.PublicKey"); $success = $pubKey->LoadEd25519($bobPubKey); if ($success == 0) { print $pubKey->LastErrorText . "\n"; exit; } // Create the shared secret: // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.EdDSA') $eddsa = new COM("Chilkat.EdDSA"); $sharedSecret = $eddsa->sharedSecretENC($privKey,$pubKey,'hexlower'); if ($eddsa->LastMethodSuccess == 0) { print $eddsa->LastErrorText . "\n"; exit; } print 'Computed: ' . $sharedSecret . "\n"; print 'Expected: 4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742' . "\n"; ?> |
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