使用SSL基礎架構：

我們有一個有效的客戶端/服務器設置,其中Android版本4.2和4.4的手機充當客戶端,必須通過其自簽名SSL證書驗證服務器.

問題：

只要設備在嘗試連接之前至少有一次互聯網訪問權限,服務器證書驗證就會起作用.但是,如果執行恢復出廠設置且設備直接連接到沒有Internet連接的專用網絡,則證書驗證將失敗.

重現行為：

>出廠重置手機

>重新啟動而不選擇連接到具有Internet訪問權限的WiFi

>嘗試驗證自簽名SSL證書 – >失敗

>連接到可上網的WiFi

>重新連接到原始專用網絡

>嘗試驗證自簽名SSL證書 – >作品

從技術上講,設備不應該需要Internet訪問來驗證自簽名證書.在進行任何SSL服務器驗證之前,是否存在某種必須加載的黑名單？我可以阻止這種行為嗎？

創建SSL上下文：

//Using a client certificate

String password = "clientpass";

KeyStore keyStore = KeyStore.getInstance("PKCS12");

InputStream is = context.getResources().openRawResource(R.raw.client);

keyStore.load(is,password.tocharArray());

is.close();

KeyManagerFactory kmf = KeyManagerFactory.getInstance("X509");

kmf.init(keyStore,password.tocharArray());

KeyManager[] keyManagers = kmf.getKeyManagers();

// Using self signed certificate

CertificateFactory cf = CertificateFactory.getInstance("X.509");

is = context.getResources().openRawResource(R.raw.cacert);

InputStream caInput = new BufferedInputStream(is);

Certificate ca;

try {

ca = cf.generateCertificate(caInput);

Log.i("CA","ca=" + ((X509Certificate) ca).getSubjectDN());

} finally {

caInput.close();

}

// Create a KeyStore containing our trusted CAs

KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());

trustStore.load(null);

trustStore.setCertificateEntry("ca",ca);

// Create a TrustManager that trusts the CAs in our KeyStore

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

tmf.init(trustStore);

TrustManager[] trustManagers = tmf.getTrustManagers();

// Create an SSLContext that uses our Trustmanager and Keymanager

SSLContext sslcontext = SSLContext.getInstance("TLS");

sslcontext.init(keyManagers,trustManagers,null);

//create a socket to connect with the server

SSLSocketFactory socketFactory = sslContext.getSocketFactory();

SSLSocket socket = (SSLSocket) socketFactory.createSocket(serverAddr,port);

socket.setUseClientMode(true);

socket.addHandshakeCompletedListener(this);

socket.startHandshake();

在startHandshake中出現異常失敗：

javax.net.ssl.SSLHandshakeException: com.android.org.bouncycastle.jce.exception.ExtCertPathValidatorException: Could not validate certificate: null