我编写了 FTPS 服务器,但在 AUTH TLS 命令之后出现 ssl 连接问题。简单的例子:
try
{
int ServerPort = 21;
ServerSocket FtpExServer = new ServerSocket(ServerPort);
while(true)
{
Socket S = FtpExServer.accept();
InputStreamReader ISR = new InputStreamReader(S.getInputStream());
OutputStreamWriter OSW = new OutputStreamWriter(S.getOutputStream());
BufferedReader ClientSocketReader = new BufferedReader(ISR);
PrintWriter ClientSocketWriter = new PrintWriter(OSW, true);
ClientSocketWriter.println("220 Welcome to FTP server.");
print(ClientSocketReader.readLine());
ClientSocketWriter.println("234 AUTH TLS successful");
char[] passphrase = "pass".toCharArray();
char[] cpassphrase = "cpass".toCharArray();
KeyStore keystore = KeyStore.getInstance("JKS");
keystore.load(new FileInputStream("keystore.jks"), passphrase);
KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
kmf.init(keystore, cpassphrase);
SSLContext context = SSLContext.getInstance("TLS");
KeyManager[] keyManagers = kmf.getKeyManagers();
context.init(keyManagers, null, null);
SSLServerSocketFactory ssf = context.getServerSocketFactory();
SSLServerSocket ss = (SSLServerSocket) ssf.createServerSocket(990);
ss.setSoTimeout(2000);
SSLSocket s = (SSLSocket)ss.accept();
ISR = new InputStreamReader(s.getInputStream());
OSW = new OutputStreamWriter(s.getOutputStream());
ClientSocketReader = new BufferedReader(ISR);
ClientSocketWriter = new PrintWriter(OSW, true);
ClientSocketWriter.println("234 AUTH TLS successful");
print(ClientSocketReader.readLine());
ClientSocketWriter.println("331 Password required for smie");
print(ClientSocketReader.readLine());
ClientSocketWriter.println("230 User smie logged in");
print(ClientSocketReader.readLine());
ClientSocketWriter.println("215 UNIX Type: L8");
print(ClientSocketReader.readLine());
ClientSocketWriter.println("550 Command not suported.");
}
}
catch(Exception e)
{
print(e);
}
说明:FTP客户端(例如MoveITFreely)连接到服务器的21端口。发送命令“AUTH TLS”后,服务器发送“234 AUTH TLS成功”。现在客户端必须连接到端口 990(?)上的服务器,但客户端不连接并获得超时异常。
我做错了什么?