我有一个 Java 客户端，它可能会创建到同一服务器的多个会话。 TLS 协议具有缓存会话密钥的功能，从而避免对每个连接进行昂贵的 PKI 处理。但我无法让它真正发挥作用。
openssl s_client -reconnect -state -prexit -connect localhost:1234
报告服务器具有“重用，TLSv1/SSLv3，密码是 ECDHE-RSA-AES256-SHA384”，以及相同的主密钥。
数据流是二进制的，不是HTTP封装的。
我使用的代码（大约）如下。它有效，但没有会话重用。
initSSLContext(keyStore, "password", trustStore, "PKIX", "TLSv1");
While (true) {
connect();
byte[] encode1 = { 0x42, 0, 0, 0, 0, 0, 0, 0, 0, };
outs.write(encode1);
byte[] ttlbuf = new byte[10000];
int len = ins.read(ttlbuf, 0, ttlbuf.length);
StringBuilder sb = new StringBuilder();
socket.close();
}
private void initSSLContext(KeyStore keyStore, String keyStorePwd, KeyStore trustStore,
String sslTrustManagerAlg, String sslProtocol) throws Exception {
KeyManager[] keyManagers = null;
if ( keyStore != null && keyStorePwd != null ) {
KeyManagerFactory kmf =
KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
kmf.init(keyStore, keyStorePwd.toCharArray());
keyManagers = kmf.getKeyManagers();
}
TrustManager[] trustManagers = null;
if ( trustStore != null ) {
TrustManagerFactory tmf = TrustManagerFactory.getInstance(sslTrustManagerAlg);
tmf.init(trustStore);
trustManagers = tmf.getTrustManagers();
}
ctx = SSLContext.getInstance(sslProtocol);
ctx.init(keyManagers, trustManagers, null);
factory = ctx.getSocketFactory();
}
private void connect() throws IOException {
socket = (SSLSocket) factory.createSocket(host, port);
socket.setSoTimeout(30000);
// ensure first ClientHello is TLSv1 rather than SSLv2
socket.setEnabledProtocols(new String[] { "TLSv1" });
socket.setEnabledCipherSuites(DEFAULT_SSL_CIPHER_SUITES);
localHost = socket.getLocalAddress().getHostAddress();
localPort = socket.getLocalPort();
ins = socket.getInputStream();
outs = socket.getOutputStream();
}
