134 lines
3.9 KiB
Python
Executable File
134 lines
3.9 KiB
Python
Executable File
#!/usr/bin/python
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import sys, os, socket, threading, logging, traceback, base64
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import paramiko
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# setup logging
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l = logging.getLogger("paramiko")
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l.setLevel(logging.DEBUG)
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if len(l.handlers) == 0:
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f = open('demo_server.log', 'w')
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lh = logging.StreamHandler(f)
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lh.setFormatter(logging.Formatter('%(levelname)-.3s [%(asctime)s] %(name)s: %(message)s', '%Y%m%d:%H%M%S'))
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l.addHandler(lh)
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#host_key = paramiko.RSAKey()
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#host_key.read_private_key_file('demo_rsa_key')
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host_key = paramiko.DSSKey()
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host_key.read_private_key_file('demo_dss_key')
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print 'Read key: ' + paramiko.util.hexify(host_key.get_fingerprint())
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class ServerTransport(paramiko.Transport):
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# 'data' is the output of base64.encodestring(str(key))
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data = 'AAAAB3NzaC1yc2EAAAABIwAAAIEAyO4it3fHlmGZWJaGrfeHOVY7RWO3P9M7hpfAu7jJ2d7eothvfeuoRFtJwhUmZDluRdFyhFY/hFAh76PJKGAusIqIQKlkJxMCKDqIexkgHAfID/6mqvmnSJf0b5W8v5h2pI/stOSwTQ+pxVhwJ9ctYDhRSlF0iTUWT10hcuO4Ks8='
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good_pub_key = paramiko.RSAKey(data=base64.decodestring(data))
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def check_channel_request(self, kind, chanid):
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if kind == 'session':
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return ServerChannel(chanid)
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return self.OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED
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def check_auth_password(self, username, password):
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if (username == 'robey') and (password == 'foo'):
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return self.AUTH_SUCCESSFUL
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return self.AUTH_FAILED
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def check_auth_publickey(self, username, key):
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print 'Auth attempt with key: ' + paramiko.util.hexify(key.get_fingerprint())
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if (username == 'robey') and (key == self.good_pub_key):
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return self.AUTH_SUCCESSFUL
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return self.AUTH_FAILED
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def get_allowed_auths(self, username):
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return 'password,publickey'
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class ServerChannel(paramiko.Channel):
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"Channel descendant that pretends to understand pty and shell requests"
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def __init__(self, chanid):
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paramiko.Channel.__init__(self, chanid)
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self.event = threading.Event()
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def check_pty_request(self, term, width, height, pixelwidth, pixelheight, modes):
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return True
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def check_shell_request(self):
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self.event.set()
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return True
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# now connect
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try:
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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sock.bind(('', 2200))
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except Exception, e:
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print '*** Bind failed: ' + str(e)
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traceback.print_exc()
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sys.exit(1)
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try:
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sock.listen(100)
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print 'Listening for connection ...'
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client, addr = sock.accept()
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except Exception, e:
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print '*** Listen/accept failed: ' + str(e)
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traceback.print_exc()
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sys.exit(1)
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print 'Got a connection!'
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try:
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event = threading.Event()
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t = ServerTransport(client)
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try:
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t.load_server_moduli()
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except:
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print '(Failed to load moduli -- gex will be unsupported.)'
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raise
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t.add_server_key(host_key)
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t.start_server(event)
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while 1:
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event.wait(0.1)
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if not t.is_active():
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print '*** SSH negotiation failed.'
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sys.exit(1)
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if event.isSet():
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break
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# print repr(t)
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# wait for auth
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chan = t.accept(20)
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if chan is None:
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print '*** No channel.'
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sys.exit(1)
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print 'Authenticated!'
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chan.event.wait(10)
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if not chan.event.isSet():
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print '*** Client never asked for a shell.'
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sys.exit(1)
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chan.send('\r\n\r\nWelcome to my dorky little BBS!\r\n\r\n')
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chan.send('We are on fire all the time! Hooray! Candy corn for everyone!\r\n')
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chan.send('Happy birthday to Robot Dave!\r\n\r\n')
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chan.send('Username: ')
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f = chan.makefile('rU')
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username = f.readline().strip('\r\n')
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chan.send('\r\nI don\'t like you, ' + username + '.\r\n')
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chan.close()
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except Exception, e:
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print '*** Caught exception: ' + str(e.__class__) + ': ' + str(e)
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traceback.print_exc()
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try:
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t.close()
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except:
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pass
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sys.exit(1)
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