我正在学习 SSL 通信，我遇到了这个问题。我正在编写一个简单的客户端，它试图与本地 apache 服务器握手。服务器已启用 https。我将服务器证书添加到所有可能的信任库（jdk 中的一个和程序使用的那个）。但是握手状态永远不会达到 FINISHED。它一直停留在 NEED_TASK 状态我在第一次进入循环时得到一个 sun.security.ssl.Handshaker$DelegatedTask 。此后状态为 NEED_TASK 并且任务为空。. 我对以下代码的理解在哪里错误\缺陷？
注意：我从以下教程中获取代码：
http://docs.oracle.com/javase/7/docs/technotes/guides/security/jsse/JSSERefGuide.html#KRB
卡在 NEED_TASK 状态的握手代码如下：
void doHandshake(SocketChannel socketChannel, SSLEngine engine,
ByteBuffer myNetData, ByteBuffer peerNetData) throws Exception {
// Create byte buffers to use for holding application data
int appBufferSize = engine.getSession().getApplicationBufferSize();
ByteBuffer myAppData = ByteBuffer.allocate(appBufferSize);
ByteBuffer peerAppData = ByteBuffer.allocate(appBufferSize);
// Begin handshake
engine.beginHandshake();
SSLEngineResult.HandshakeStatus hs = engine.getHandshakeStatus();
int i=0;
// Process handshaking message
while (hs != SSLEngineResult.HandshakeStatus.FINISHED &&
hs != SSLEngineResult.HandshakeStatus.NOT_HANDSHAKING) {
i++;
switch (hs) {
case NEED_UNWRAP:
// Receive handshaking data from peer
if (socketChannel.read(peerNetData) < 0) {
// The channel has reached end-of-stream
}
// Process incoming handshaking data
peerNetData.flip();
SSLEngineResult res = engine.unwrap(peerNetData, peerAppData);
peerNetData.compact();
hs = res.getHandshakeStatus();
// Check status
switch (res.getStatus()) {
case OK :
// Handle OK status
break;
// Handle other status: BUFFER_UNDERFLOW, BUFFER_OVERFLOW, CLOSED
}
break;
case NEED_WRAP :
// Empty the local network packet buffer.
myNetData.clear();
// Generate handshaking data
res = engine.wrap(myAppData, myNetData);
hs = res.getHandshakeStatus();
// Check status
switch (res.getStatus()) {
case OK :
myNetData.flip();
// Send the handshaking data to peer
while (myNetData.hasRemaining()) {
socketChannel.write(myNetData);
}
break;
// Handle other status: BUFFER_OVERFLOW, BUFFER_UNDERFLOW, CLOSED
}
break;
case NEED_TASK :
Runnable task =engine.getDelegatedTask();
if(task!= null) {
//task.run();
new Thread(task).start();
}// Handle blocking tasks
break;
// Handle other status: // FINISHED or NOT_HANDSHAKING
}
}
// Processes after handshaking
}
任何帮助，将不胜感激。