编辑:“下面的代码工作正常,没有错误,没有异常”
我知道关于这个主题的大量问题,以及谷歌想到的许多博客。我已通读它们并设法想出我将要解释的内容。我的疑问在于“我的方法正确吗?它有副作用吗?”以及在我解释我的方法时最好提出的另一个问题。
我基于此方法遵循此Android.开发者教程 http://developer.android.com/training/articles/security-ssl.html#UnknownCa.
System.setProperty("jsse.enableSNIExtension", "false");
//Java 7 introduced SNI (enabled by default). The server I use is
// misconfigured I suppose and
// it sends an "Unrecognized Name" warning in the SSL handshake
// which breaks my web service.
// Load CA from an InputStream (CA would be saved in Raw file,
// and loaded as a raw resource)
CertificateFactory cf = CertificateFactory.getInstance("X.509");
InputStream caInput = new BufferedInputStream(new FileInputStream("PATH_TO_CERT.crt"));
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 that uses our TrustManager
SSLContext context = SSLContext.getInstance("TLS");
context.init(null, tmf.getTrustManagers(), null);
// Create all-trusting host name verifier
// to avoid the following :
// java.security.cert.CertificateException: No name matching
// This is because Java by default verifies that the certificate CN (Common Name) is
// the same as host name in the URL. If they are not, the web service client fails.
HostnameVerifier allHostsValid = new HostnameVerifier() {
@Override
public boolean verify(String arg0, SSLSession arg1) {
return true;
}
};
//Install it
HttpsURLConnection.setDefaultHostnameVerifier(allHostsValid);
// Tell the URLConnection to use a SocketFactory from our SSLContext
URL url = new URL("https....");
urlConnection.setSSLSocketFactory(context.getSocketFactory());
try {
HttpsURLConnection urlConnection = (HttpsURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();
switch(urlConnection.getResponseCode()){
case 401:
BufferedReader br = new BufferedReader(new InputStreamReader(urlConnection.getErrorStream()));
StringBuilder sb = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
sb.append(line+"\n");
}
br.close();
System.out.println( sb.toString());
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
这是我的另一个问题,如下所示:
InputStream caInput = new BufferedInputStream(new FileInputStream("PATH_TO_CERT.crt"));
您会看到该方法强制我将certificate.crt 预加载到res 文件夹内的原始文件中。有没有办法(我已经看过,但找到了 0 个答案)连接到服务器并下载所述certificate.crt并将其保存在用户无法访问的私人文件夹中?
None
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