几天前，我问了一个有关Jasypt的问题。我引用了一个引发EncryptionOperationNotPossibleException的较大程序。好吧，我仍然无法解决问题。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
这真是发紫。字符编码可能存在问题，但我不确定。服务器和客户端目前正在同一台计算机上运行，我很确定自己始终使用US-ASCII。以下是相关代码：
这是客户：
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，它允许服务器识别正在与之交谈的人（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错误的愚蠢错误！
谢谢。
编辑：我已经添加了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;
}
最佳答案
我想到了：
这就是事情...我在这里写的bb2str()的实现似乎清空了字节缓冲区。所以我只能打一次bb2str。如果我不止一次调用它，那么我将得到一个空字符串，并且搞砸了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，如果
encryptedMessage.length为零且<= this.saltSizeBytes为8，则encryptedMessage.length将为this.saltSizeBytes。它是固定的。战争已结束。