Android读取证书文件

Question

我真的需要一位专家来帮助我。谢谢!我编写了一个程序，从资产中读取证书文件，并通过套接字发送。

但是，下面这行代码不起作用：

"X509Certificate clientcert=(X509Certificate)of.generateCertificate(in)"

我很困惑。整个程序如下：

private Socket client = null;
private Button button;
private FileInputStream fis = null;

private ObjectOutputStream out = null;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    button = (Button) findViewById(R.id.button);
    button.setOnClickListener(new OnClickListener()
    {
        public void onClick(View v)
        {
            new Thread (new Runnable()
            {
                public void run()
                {
                    try
                    {
                        client = new Socket("192.168.1.186", 4444);
                        out = new ObjectOutputStream(client.getOutputStream());

                        AssetManager assetManager = getAssets();
                        InputStream in;
                        in = assetManager.open("client.crt");

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

                        X509Certificate clientcert = (X509Certificate) of.generateCertificate(in);  

                        out.writeObject(clientcert);

                        in.close();
                        out.close();
                    }
                    catch(Exception e)
                    {
                        e.printStackTrace();
                    }
                }
            }).start();
        }
    });
}

Answer 1

您好，请尝试以下方式阅读证书：

CertificateFactory.getInstance("X.509").generateCertificate(new FileInputStream("path")));