在Android設(shè)備上實現(xiàn)與服務(wù)器的加密通信,通常需要以下幾個步驟:
1、創(chuàng)建SSLSocketFactory
2、使用SSLSocketFactory創(chuàng)建SSLSocket
3、通過SSLSocket發(fā)送和接收數(shù)據(jù)
以下是詳細的步驟和代碼示例:
1. 創(chuàng)建SSLSocketFactory
我們需要創(chuàng)建一個SSLSocketFactory,這需要使用到TrustManagerFactory和KeyStore。
import javax.net.ssl.*; import java.security.KeyStore; import java.security.cert.Certificate; import java.security.cert.CertificateFactory; // Load the certificate from an input stream CertificateFactory cf = CertificateFactory.getInstance("X.509"); InputStream caInput = new BufferedInputStream(new FileInputStream("path_to_certificate")); Certificate ca; try { ca = cf.generateCertificate(caInput); } finally { caInput.close(); } // Create a KeyStore containing our trusted CAs String keyStoreType = KeyStore.getDefaultType(); KeyStore keyStore = KeyStore.getInstance(keyStoreType); keyStore.load(null, null); keyStore.setCertificateEntry("ca", ca); // Create a TrustManager that trusts the CAs in our KeyStore String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm(); TrustManagerFactory tmf = TrustManagerFactory.getInstance(tmfAlgorithm); tmf.init(keyStore); // Create an SSLContext with the TrustManager SSLContext context = SSLContext.getInstance("TLS"); context.init(null, tmf.getTrustManagers(), null);
2. 使用SSLSocketFactory創(chuàng)建SSLSocket
我們可以使用上面創(chuàng)建的SSLSocketFactory來創(chuàng)建SSLSocket。
SSLSocketFactory sslSocketFactory = context.getSocketFactory(); SSLSocket sslSocket = (SSLSocket) sslSocketFactory.createSocket("your_host", your_port);
3. 通過SSLSocket發(fā)送和接收數(shù)據(jù)
我們可以通過SSLSocket的輸入輸出流來發(fā)送和接收數(shù)據(jù)。
InputStream inputStream = sslSocket.getInputStream(); OutputStream outputStream = sslSocket.getOutputStream(); // Write to the server outputStream.write("Hello, Server!".getBytes()); // Read the response int bytesRead; byte[] buffer = new byte[1024]; while ((bytesRead = inputStream.read(buffer)) != 1) { System.out.println(new String(buffer, 0, bytesRead)); }
注意:以上代碼只是一個基本的示例,實際使用時需要根據(jù)具體情況進行修改,你可能需要處理IOException,以及在讀取服務(wù)器響應(yīng)時可能需要更復(fù)雜的邏輯。