JWT签名验证失败，java到php

Question

I share with you the first codes

php codes http://pastebin.com/b8TNfyzq line 22

JwtTester.java http://pastebin.com/TsF0wsCX line 22

Token created in java code I wrote in php server does not match the token. Although I can not verify the same key on both sides

I'm using github.com/jwtk/jjwt in java code and github.com/firebase/php-jwt in php codes

same with java code and data in key , consists of different token when I create the token in only PHP

Answer 1

Is a format conversion issue. jjwt requires a key encoded in base64 and php-jwt uses a plain string

Jjwt JwtBuilder

JwtBuilder signWith(SignatureAlgorithm alg, String base64EncodedSecretKey);

Php-jwt JWT

 /**
 * Decodes a JWT string into a PHP object.
 *
 * @param string        $jwt            The JWT
 * @param string|array  $key            The key, or map of keys.
 *                                      If the algorithm used is asymmetric, this is the public key
public static function decode($jwt, $key, $allowed_algs = array()

Encode your key in base64 before invoking JwtBuilder.signWith

builder.signWith(SignatureAlgorithm.HS256, 
                               DatatypeConverter.printBase64Binary(key));