GSSAPI实现Kerberos代理
时间: 2023-08-24 11:41:48 浏览: 45
GSSAPI可以用于实现Kerberos代理,通过代理服务器协助客户端完成Kerberos认证。下面是一个简单的GSSAPI实现Kerberos代理的示例:
```java
public class KerberosProxy {
public static void main(String[] args) throws Exception {
// 创建ServerSocket并监听端口
ServerSocket serverSocket = new ServerSocket(8888);
System.out.println("Kerberos Proxy started, listening on port 8888...");
// 循环等待客户端连接
while (true) {
Socket clientSocket = serverSocket.accept();
System.out.println("Accepted connection from client: " + clientSocket.getInetAddress());
// 创建Kerberos上下文
String serviceName = "HTTP/example.com";
GSSManager manager = GSSManager.getInstance();
GSSName serverName = manager.createName(serviceName, null);
GSSContext context = manager.createContext(serverName, null, null, GSSContext.DEFAULT_LIFETIME);
// 循环处理客户端请求
byte[] token = new byte[0];
while (!context.isEstablished()) {
// 接收客户端请求并转发给服务端
InputStream inputStream = clientSocket.getInputStream();
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
byte[] buffer = new byte[4096];
int len;
while ((len = inputStream.read(buffer)) > 0) {
outputStream.write(buffer, 0, len);
}
byte[] request = outputStream.toByteArray();
outputStream.close();
token = context.initSecContext(request, 0, request.length);
if (token != null && token.length > 0) {
// 将服务端响应转发给客户端
OutputStream outputStream1 = clientSocket.getOutputStream();
outputStream1.write(token);
outputStream1.flush();
}
}
// 认证成功,获取客户端Subject,并将认证结果发送给客户端
Subject clientSubject = new Subject();
Set<GSSCredential> creds = clientSubject.getPrivateCredentials(GSSCredential.class);
GSSCredential credential = creds.iterator().next();
System.out.println("Kerberos authentication successful. Client principal: " + credential.getName());
clientSocket.getOutputStream().write("Kerberos authentication successful.".getBytes());
clientSocket.getOutputStream().flush();
clientSocket.close();
}
}
}
```
在上述示例中,我们创建了一个ServerSocket并监听端口,循环等待客户端连接。当客户端连接时,我们创建了一个Kerberos上下文,并循环处理客户端请求。在处理客户端请求时,我们将请求转发给服务端,并将服务端响应转发给客户端。当Kerberos认证成功后,我们获取了客户端Subject,并将认证结果发送给客户端。
需要注意的是,上述示例仅用于演示如何使用GSSAPI实现Kerberos代理,并且还需要进行一些额外的配置,例如指定krb5配置文件等。具体配置和使用方法可以参考Java官方文档。