add ssh modules

Medium_articles/python_ssh_modules/paramiko_example.py

@@ -0,0 +1,63 @@
+import getopt
+import paramiko
+import socket
+import threading
+
+def main():
+    if not len(sys.argv[1:]):
+        print('Usage: ssh_server.py <SERVER>  <PORT>')
+        return
+
+    # Create a socket object.
+    server = sys.argv[1]
+    ssh_port = int(sys.argv[2])
+
+    try:
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        sock.bind((server, ssh_port))
+        sock.listen(100)
+        print('[+] Listening for connection ...')
+        client, addr = sock.accept()
+    except Exception, e:
+        print(f'[-] Connection Failed: {str(e)}')
+        return
+    print('[+] Connection Established!')
+
+    # Creating a paramiko object.
+    try:
+        Session = paramiko.Transport(client)
+        Session.add_server_key(HOST_KEY)
+        paramiko.util.log_to_file('filename.log')
+        server = Server()
+        try:
+            Session.start_server(server=server)
+        except paramiko.SSHException, x:
+            print('[-] SSH negotiation failed.')
+            return
+        chan = Session.accept(10)
+        print('[+] Authenticated!')
+        chan.send('Welcome to Buffy's SSH')
+        while 1:
+            try:
+                command = raw_input('Enter command: ').strip('\n')
+                if command != 'exit':
+                    chan.send(command)
+                    print chan.recv(1024) + '\n'
+                else:
+                    chan.send('exit')
+                    print('[*] Exiting ...')
+                    session.close()
+                    raise Exception('exit')
+            except KeyboardInterrupt:
+                session.close()
+    except Exception, e:
+        print(f'[-] Caught exception: {str(e)}')
+        try:
+            session.close()
+        except:
+            pass
+
+            
+if __name__ == '__main__':
+    main()