public static void main(String[] args) {
Security.setProperty("ssl.SocketFactory.provider", "com.digt.trusted.jsse.provider.DigtSocketFactory");
System.setProperty("com.digt.trusted.jsse.certFile", "Certificate.cer");
System.setProperty("com.digt.trusted.jsse.keyPasswd", "123");

System.setProperty("javax.net.debug", "all");
args = new String[]{"api.dom.gosuslugi.ru","443"}; //продуктив
// args = new String[]{"217.107.108.156","10081"}; //тестовый

try {
SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
SSLSocket sslsocket = (SSLSocket) sslsocketfactory.createSocket(args[0], Integer.parseInt(args[1]));

InputStream in = sslsocket.getInputStream(); //Ошибка здесь
OutputStream out = sslsocket.getOutputStream();

// Write a test byte to get a reaction :)
out.write(1);

while (in.available() > 0) {
System.out.print(in.read());
}
System.out.println("Successfully connected");

} catch (Exception exception) {
exception.printStackTrace();
}
}

java.io.IOException: Invalid peer certificate
at com.digt.trusted.jsse.provider.DigtSSLSocket.startHandshake(Unknown Source)
at com.digt.trusted.jsse.provider.DigtSSLSocket.getInputStream(Unknown Source)
at com.tehnologia.gisjkh.SSLPoke.main(SSLPoke.java:25)