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(PHP Extension) Verify JWT with EdDSA / Ed25519 SignatureNote: This example requires Chilkat v9.5.0.84 or greater. Demonstrates how to verify a JWT that was signed using an Ed25519 private key. This example verifies the EdDSA signature. It also does the following:
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // Demonstrates how to verify a JWT with an EdDSA/Ed25519 Signature // *** Requires Chilkat v9.5.0.84 or greater. // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Use this Ed25519 public key for verification $jsonPubKey = '{\'kty\': \'OKP\',\'alg\': \'EdDSA\',\'crv\': \'Ed25519\',\'x\': \'11qYAYKxCrfVS_7TyWQHOg7hcvPapiMlrwIaaPcHURo\'}'; $pubKey = new CkPublicKey(); $success = $pubKey->LoadFromString($jsonPubKey); if ($success == false) { print $pubKey->lastErrorText() . "\n"; exit; } $jwt = new CkJwt(); $token = 'eyJhbGciOiJFZERTQSJ9.RXhhbXBsZSBvZiBFZDI1NTE5IHNpZ25pbmc.hgyY0il_MGCjP0JzlnLWG1PPOt7-09PGcvMg3AIbQR6dWbhijcNR4ki4iylGjg5BhVsPt9g7sVvpAr_MuM0KAg'; // First verify the signature. $sigVerified = $jwt->VerifyJwtPk($token,$pubKey); print 'verified: ' . $sigVerified . "\n"; if ($sigVerified == false) { print $jwt->lastErrorText() . "\n"; exit; } // Let's see if the time constraints, if any, are valid. // The above JWT was created on the afternoon of 16-May-2016, with an expiration of 1 hour. // If the current system time is before the "nbf" time, or after the "exp" time, // then IsTimeValid will return false/0. // Also, we'll allow a leeway of 60 seconds to account for any clock skew. // Note: If the token has no "nbf" or "exp" claim fields, then IsTimeValid is always true. $leeway = 60; $bTimeValid = $jwt->IsTimeValid($token,$leeway); print 'time constraints valid: ' . $bTimeValid . "\n"; // Recover the original data (the payload). $payload = $jwt->getPayload($token); print $payload . "\n"; // Recover the original JOSE header in the same way: $joseHeader = $jwt->getHeader($token); print $joseHeader . "\n"; ?> |
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