java - Jasypt EncryptionOperationNotPossibleException

Question

几天前，我提出了一个有关 Jasypt 问题的问题。我引用了一个抛出 EncryptionOperationNotPossibleException 的较大程序。嗯，我还是没能弄清楚问题所在。这是正在发生的事情:(这提供了对其工作原理的深入了解:)

Step 1: Connection
Client Connects
Server Callback: connection(Selection key)
Server Sends Cipher
    Client Receives Cipher
Sends encrypted "connection" message  "YYPgDOGffgxu6aahZyNSgw=="
    Client Receives Encrypted msg "YYPgDOGffgxu6aahZyNSgw=="
    Client Throws EncryptionOperationNotPossibleExcepton
        at line 45

这真是紫星啊。字符编码可能有问题，但我不确定。服务器和客户端目前在同一台计算机上运行，​​我很确定我自始至终都在使用 US-ASCII。相关代码如下:

这是客户端:

public static String CHAR_ENC_B = "US-ASCII";
public static String cipher = null;

public static void main(String[] argv) throws UnknownHostException {
    final BasicTextEncryptor textEncryptor = new BasicTextEncryptor();
    AbstractBlockingClient client = new AbstractBlockingClient(InetAddress.getByName("127.0.0.1"),4444) {
        @Override
        protected void messageReceived(ByteBuffer message) {
            if (cipher==null) {
                cipher=bb2str(message); 
                textEncryptor.setPassword(cipher);
                System.out.println("Cipher(20):"+cipher);}
            else {
                System.out.println("Raw Message(22):"+bb2str(message));
                System.out.println("Decrypted(23):"+textEncryptor.decrypt(bb2str(message)));
                String tosend = textEncryptor.encrypt("Test Reply");
                try {
                    this.write(textEncryptor.encrypt("Test Reply").getBytes(CHAR_ENC_B));
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
            }
        }

        @Override
        protected void disconnected() {

        }

        @Override
        protected void connected(boolean alreadyConnected) {

        }
    };
    client.run();
}

这是服务器:

public static String CHAR_ENC_B = "US-ASCII";
public static void main(String[] argv) {
//Create the server:
    AbstractServer server = new AbstractServer(4444) {
        @Override
        protected void messageReceived(ByteBuffer message, SelectionKey key) {
            System.out.println("Recieved Raw Message(18):"+bb2str(message));
            System.out.println("Recieved Decrypted Message(19):"+decrypt_string(getCS(key).ekey,bb2str(message)));
            ClientSelector replacement = process_message(decrypt_string(getCS(key).ekey,bb2str(message)),getCS(key));
            key.attach(replacement);
        }
        @Override
        protected void connection(SelectionKey key) {
            ClientSelector newone = new ClientSelector(key,"","","");
            newone.ip = ((SocketChannel)key.channel()).socket().getRemoteSocketAddress().toString();
            key.attach(newone);
            this.write(key,newone.ekey.getBytes());
            String tosend = encrypt_string(newone.ekey,"a");
            this.write(key,tosend.getBytes());
            System.out.println("Cipher:"+newone.ekey);
            System.out.println("Encrypted String Sent(34):"+tosend);
        }
        @Override
        protected void disconnected(SelectionKey key) {

        }
        @Override
        protected void started(boolean alreadyStarted) {
            System.out.println("SERVER STARTED");
        }
        @Override
        protected void stopped() {

        }
    };
    server.run();
}
public static String decrypt_string(String key, String msg) {
    BasicTextEncryptor textEncryptor = new BasicTextEncryptor();
    textEncryptor.setPassword(key);
    return textEncryptor.decrypt(msg);
}
public static String encrypt_string(String key, String msg) {
    BasicTextEncryptor textEncryptor = new BasicTextEncryptor();
    textEncryptor.setPassword(key);
    return textEncryptor.encrypt(msg);
}

这些实际上并不是要发送的消息，但这是一个很好的起点。

一些信息:ClientSelector 是一个类，允许服务器识别正在与谁通信(使用用户名、密码、IP 等)，并且 bb2str 将 ByteBuffer 转换为 String。

任何帮助将不胜感激。我希望这不是像上一个那样的愚蠢错误!谢谢。

编辑:我添加了 bb2str 的代码:

public static String bb2str(ByteBuffer bytebuff) {
    byte[] bytearr = new byte[bytebuff.remaining()];
    bytebuff.get(bytearr);
    String s = null;
    try {s = new String(bytearr,"US-ASCII");} 
    catch (UnsupportedEncodingException e) {e.printStackTrace();}
    return s;
}

Answer 1

我明白了:

事情是这样的... bb2str() 的实现我这里写的好像清空了bytebuffer。所以我只能调用bb2str一次。如果我多次调用它，那么我最终会得到一个空字符串，这会搞砸 jayspt，因为在代码中:

if (this.saltGenerator.includePlainSaltInEncryptionResults()) {
        // Check that the received message is bigger than the salt
        if (encryptedMessage.length <= this.saltSizeBytes) {
            throw new EncryptionOperationNotPossibleException();
        }
}

当然还有encryptedMessage.length将是 <= this.saltSizeBytes如果encryptedMessage.length为零且 this.saltSizeBytes是 8。

已修复。 war 结束了。