Java 解密JWE时出错

对JWE解密来说有点新鲜。我有一个执行JWE的服务器，它根据服务器和客户机之间共享的密钥将JWE发送给客户机

我正在使用一个Jose4j进行解密，并且得到了这个错误

java.lang.NullPointerException:尚未设置JWE的明文负载。

我使用的示例代码如本链接“接收器部分”中所示

我对服务器没有任何了解，我只是在编写客户端。我很困惑paylaod本身是否不会出现，或者该框架是否在试图解密时出错

任何调试该问题的指针都将受到赞赏

问候,，

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Aravind

只有在没有有效负载集的情况下，才会从

getCompactSerialization（）

方法引发特定异常-

getCompactSerialization（）

是发送/加密端创建JWE的最后一步。如果你正在解密，你不应该叫它。也许你在某处接到一个意外的电话？否则，您使用的代码以及示例原始JWE值可能有助于解决疑难问题（和密钥，如果这只是一个测试，您可以共享它们）

JWE需要两级解密才能获得纯文本负载

所以首先是JWE到JWS。 然后在验证签名后从JWS到JWT。下面的代码将实现这一点

  // That other party, the receiver, can then use JsonWebEncryption to decrypt the message.
        JsonWebEncryption receiverJwe = new JsonWebEncryption();

        // Set the compact serialization on new Json Web Encryption object
        //This is the received payload JWE payload 
        receiverJwe.setCompactSerialization(result.toString());


        // Symmetric encryption, like we are doing here, requires that both parties have the same key.
        // The key will have had to have been securely exchanged out-of-band somehow.
        receiverJwe.setKey(secretKeySpec);

        // Set the "alg" header, which indicates the key management mode for this JWE.
        // In this example we are using the direct key management mode, which means
        // the given key will be used directly as the content encryption key.
        //receiverJwe.setAlgorithmHeaderValue(KeyManagementAlgorithmIdentifiers.DIRECT);

        //receiverJwe.setEncryptionMethodHeaderParameter(ContentEncryptionAlgorithmIdentifiers.AES_128_CBC_HMAC_SHA_256);

        // Get the message that was encrypted in the JWE. This step performs the actual decryption steps.
        String jwsPayload = receiverJwe.getPlaintextString();

        // And do whatever you need to do with the clear text message.
        System.out.println("plaintext: " + jwsPayload);

        // Create a new JsonWebSignature object
        JsonWebSignature jws = new JsonWebSignature();

        jws.setCompactSerialization(jwsPayload);

        jws.setKey(secretKeySpec);

        boolean signatureVerified = jws.verifySignature();

        // Do something useful with the result of signature verification
        System.out.println("JWS Signature is valid: " + signatureVerified);

        // Get the payload, or signed content, from the JWS
        String payload = jws.getPayload();

        // Do something useful with the content
        System.out.println("JWS payload: " + payload);

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添加了有效负载、密钥和我得到的新错误。再次感谢你的帮助，不用担心。。谢谢。。它很有魅力。。添加上面的代码以便其他人可以使用。。