Why does SSLSocketFactory.createSocket returns a Socket instead of SSLSocket?

Why does SSLSocketFactory.createSocket returns a Socket instead of SSLSocket?

By : Acie Clayborne
Date : November 29 2020, 01:01 AM
I hope this helps . Because createSocket method is inherited from SocketFactory. It's impossible to override result type.
There could be a way around it using generics, but that would break existing API and all existing code.
code :

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Is it possible to change plain socket to SSLSocket?

Is it possible to change plain socket to SSLSocket?

By : user3254651
Date : March 29 2020, 07:55 AM
I hope this helps you . There is a plain socket server listening on port 12345; ,
Is it possible to change plain socket to SSLSocket?
code :
ServerSocketFactory ssf = ServerSocketFactory.getDefault();
ServerSocket serverSocket = ssf.createServerSocket(12345);

// I've initialised an sslContext with a keystore, as you normally would.
Socket socket = serverSocket.accept();
SSLSocketFactory sslSf = sslContext.getSocketFactory();
// The host name doesn't really matter, since we're turning it into a server socket
// (No need to match the host name to the certificate on this side).
SSLSocket sslSocket = (SSLSocket) sslSf.createSocket(socket, null,
    socket.getPort(), false);

// Use the sslSocket InputStream/OutputStream as usual.
SSLSocketFactory difference between flavors of createSocket

SSLSocketFactory difference between flavors of createSocket

By : Jet Propelled Insect
Date : March 29 2020, 07:55 AM
Hope that helps Significant delays in socket programming are almost always DNS delays. You need to be aware that Java does reverse DNS as well as forward DNS. Make sure you can resolve all relevant peer hostnames to IP addresses and vice versa at all hosts. The delay is incurred creating the Socket or the InetAddress it is to connect to, or both. If you do that separately you will see the delay there, before you call createSocket(socket, ...); if you let the SSLSocketFactory create its own Socket by calling createSocket(host, port, ...), the delay will occur at that point.
SMTP socket -- Authentocation & SSLSocket

SMTP socket -- Authentocation & SSLSocket

By : Maya
Date : March 29 2020, 07:55 AM
I wish this helpful for you Servers usually require some form of authentication but normally at a minimum will at least ensure that you are sending from the domain that you say you are sending from (by checking your IP address against the domain and also verifying that the domain is allowed). A lot of work has been done to prevent spammers from sending email on open email hosts.
Part of your problem is that you are sending SMTP commands when the mail server (MTA - mail transfer agent) is expecting you to be negotiating an SSL session. You might try using something like tcpdump or wireshark to examine an actual session.
code :
C - connect to server
S - shows SMTP prompt with a 2xx series prefix
C - send ELHO (or HELO for less capable servers)
S - should respond with a 2xx series of messages with capabilities one per line if your domain is ok
S - response with 2xx series message
createSocket() returns after a long time

createSocket() returns after a long time

By : Hans Månsson
Date : March 29 2020, 07:55 AM
To fix this issue Instead of calling socket(String, int) call socket() and then after, define the timeout, and call connect(InetSocketAddress, int) which takes an int for timeout.
code :
    try (SSLSocket sslSocket = (SSLSocket) sslCtx.getSocketFactory().createSocket()) {
        Certificate[] certificates = sslSocket.getSession().getPeerCertificates();
        sslSocket.connect(new InetSocketAddress("", 443), 5_000);
    } catch (Exception e) {
Create SSLSocket by SSLSocketFactory with set connection timeout

Create SSLSocket by SSLSocketFactory with set connection timeout

By : Lj Feller
Date : March 29 2020, 07:55 AM
like below fixes the issue In case you are still wondering, you can use the idea given in https://groups.google.com/forum/#!topic/android-developers/EYtMO5WoXXI
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