SSL 套接字连接

sockets ssl android java client-server

2022-09-02 09:29:42

如何创建 SSL 套接字连接？

我真的需要创建密钥库吗？此密钥库应与我的所有客户端应用程序共享？

我使用以下代码创建了一个服务器：

SSLServerSocketFactory sslserversocketfactory = (SSLServerSocketFactory) SSLServerSocketFactory
                    .getDefault();
SSLServerSocket sslserversocket = (SSLServerSocket) sslserversocketfactory
                    .createServerSocket(ServerProperties.getInstance()
                            .getVSSPAuthenticationPort());

我使用以下代码在Android上创建了一个客户端：

SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory
                .getDefault();
SSLSocket sslsocket = (SSLSocket) sslsocketfactory.createSocket(
                host, authPort);

sslsocket.startHandshake();

BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(
                sslsocket.getOutputStream()));
BufferedReader reader = new BufferedReader(new InputStreamReader(
                sslsocket.getInputStream()));

但是当我尝试连接时，会引发以下错误：

javax.net.ssl.SSLHandshakeException: no cipher suites in common
    at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
    at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1886)
    at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:276)
    at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:266)
    at sun.security.ssl.ServerHandshaker.chooseCipherSuite(ServerHandshaker.java:894)
    at sun.security.ssl.ServerHandshaker.clientHello(ServerHandshaker.java:622)
    at sun.security.ssl.ServerHandshaker.processMessage(ServerHandshaker.java:167)
    at sun.security.ssl.Handshaker.processLoop(Handshaker.java:868)
    at sun.security.ssl.Handshaker.process_record(Handshaker.java:804)
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1016)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1312)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1339)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1323)

答案 1

您需要一个证书来建立 ssl 连接，您可以在密钥库中装入证书，也可以装入证书本身。我将展示密钥库选项的一些示例。

您的代码需要一些参数才能运行：

java -Djavax.net.ssl.keyStore=keyStoreFile -Djavax.net.ssl.keyStorePassword=keystorePassword Server

您还可以使用java代码加载密钥库，最简单的解决方案是设置系统属性：

System.setProperty("javax.net.ssl.keyStore", 'keystoreFile');
System.setProperty("javax.net.ssl.keyStorePassword", 'keystorePassword ');

您也可以使用不同的方式加载密钥库，它更复杂，但您有能力做更复杂的事情：

KeyStore ks = KeyStore.getInstance("JKS");
ks.load(new FileInputStream("keystoreFile"), "keystorePassword".toCharArray());

KeyManagerFactory kmf = KeyManagerFactory.getInstance("X509");
kmf.init(ks, "keystorePassword".toCharArray());

TrustManagerFactory tmf = TrustManagerFactory.getInstance("X509"); 
tmf.init(ks);

SSLContext sc = SSLContext.getInstance("TLS"); 
TrustManager[] trustManagers = tmf.getTrustManagers(); 
sc.init(kmf.getKeyManagers(), trustManagers, null); 

SSLServerSocketFactory ssf = sc.getServerSocketFactory(); 
SSLServerSocket s = (SSLServerSocket) ssf.createServerSocket(serverport);
SSLSocket c = (SSLSocket) s.accept();

对于客户端，代码最后几行有一些更改，最后3行将替换为这些：

SSLSocketFactory ssf = sc.getSocketFactory(); 
SSLSocket s = (SSLSocket) ssf.createSocket(serverip, serverport);
s.startHandshake();

如果要为Android加载密钥库，则类型必须是“BKS”而不是“JKS”。您可以轻松找到用于创建密钥库的资源。

答案 2