Python paramiko.AuthenticationException() Examples

def fetch_remote_crashes(self):
        """
        some exception handling code is taken from https://www.programcreek.com/python/example/105570/scp.SCPClient
        """
        try:
            ssh = SSHClient()
            ssh.load_system_host_keys()
            ssh.connect(hostname=config.remote_system_ip)
            self.copy_crashes_dir_with_scp(ssh)
        except AuthenticationException:
            print("Authentication failed, please verify your credentials: %s")
        except SSHException as sshException:
            print("Unable to establish SSH connection: %s" % sshException)
        except BadHostKeyException as badHostKeyException:
            print("Unable to verify server's host key: %s" % badHostKeyException)
        finally:
            ssh.close() 

def connect(self):
        """Call to set connection with remote client."""

        try:
            self.paramiko_session = paramiko.SSHClient()
            self.paramiko_session.set_missing_host_key_policy(
                paramiko.AutoAddPolicy())

            self.paramiko_session.connect(
                self.client.ip, username=self.client.user,
                password=self.client.pass_, key_filename=self.client.key,
                allow_agent=True, compress=self.client.compress)

        except (paramiko.AuthenticationException,
                paramiko.ssh_exception.NoValidConnectionsError) as e:
            self.logger.error(e)
            sys.exit(colored("> {}".format(e), 'red'))

        except paramiko.SSHException as e:
            self.logger.error(e)
            sys.exit(colored("> {}".format(e), 'red'))

        self.transfer = network.Network(
            self.paramiko_session, self.client.ip, self.client.port)
        self.transfer.open() 

def _try_passwordless_paramiko(server, keyfile):
    """Try passwordless login with paramiko."""
    if paramiko is None:
        msg = "Paramiko unavaliable, "
        if sys.platform == 'win32':
            msg += "Paramiko is required for ssh tunneled connections on Windows."
        else:
            msg += "use OpenSSH."
        raise ImportError(msg)
    username, server, port = _split_server(server)
    client = paramiko.SSHClient()
    client.load_system_host_keys()
    client.set_missing_host_key_policy(paramiko.WarningPolicy())
    try:
        client.connect(server, port, username=username, key_filename=keyfile,
               look_for_keys=True)
    except paramiko.AuthenticationException:
        return False
    else:
        client.close()
        return True 

def _try_passwordless_paramiko(server, keyfile):
    """Try passwordless login with paramiko."""
    if paramiko is None:
        msg = "Paramiko unavailable, "
        if sys.platform == 'win32':
            msg += "Paramiko is required for ssh tunneled connections on Windows."
        else:
            msg += "use OpenSSH."
        raise ImportError(msg)
    username, server, port = _split_server(server)
    client = paramiko.SSHClient()
    client.load_system_host_keys()
    client.set_missing_host_key_policy(paramiko.WarningPolicy())
    try:
        client.connect(server, port, username=username, key_filename=keyfile,
               look_for_keys=True)
    except paramiko.AuthenticationException:
        return False
    else:
        client.close()
        return True 

def attempt(Password):

    IP = "127.0.0.1"
    USER = "rejah"
    PORT=22
      
    try:

        ssh = paramiko.SSHClient()
        ssh.load_system_host_keys()
        ssh.set_missing_host_key_policy(paramiko.MissingHostKeyPolicy())
 
        try:
            ssh.connect(IP , port=PORT, username=USER, password=Password)
            print "Connected successfully. Password = "+Password
        except paramiko.AuthenticationException, error:
            print "Incorrect password: "+Password
            pass
        except socket.error, error:
            print error
            pass 

def loginandrun(hostname,uname,pwd,command):
     try:
        log.info("Establishing ssh connection")
        client = getsshClient()
        client.load_system_host_keys()
        client.connect(hostname)#,username=uname)#,password=pwd)
     except paramiko.AuthenticationException:
        print("Authentication failed, please verify your credentials: %s")
     except paramiko.SSHException as sshException:
        print("Unable to establish SSH connection: %s" % sshException)
     except paramiko.BadHostKeyException as badHostKeyException:
        print("Unable to verify server's host key: %s" % badHostKeyException)
     try:
        stdin, stdout, stderr = client.exec_command(command)
        result = stderr.read()
        if len(result)  > 0:
            print("hit error" + result)

     except Exception as e:
        print("Operation error: %s", e)


# Any new implementation to use this method 

def loginandcopy(hostname,uname,pwd,sfile,tfile):
     try:
        log.info("Establishing ssh connection")
        client = getsshClient()
        client.load_system_host_keys()
        client.connect(hostname)#,username=uname)#,password=pwd)
     except paramiko.AuthenticationException:
        print("Authentication failed, please verify your credentials: %s")
     except paramiko.SSHException as sshException:
        print("Unable to establish SSH connection: %s" % sshException)
     except paramiko.BadHostKeyException as badHostKeyException:
        print("Unable to verify server's host key: %s" % badHostKeyException)
     except Exception as e:
        print(e.args)
     try:
        log.info("Getting SCP Client")
        scpclient = scp.SCPClient(client.get_transport())
        log.info(scpclient)
        log.info("Hostname: %s", hostname)
        log.info("source file: %s", sfile)
        log.info("target file: %s", tfile)
        scpclient.put(sfile,tfile)
     except scp.SCPException as e:
        print("Operation error: %s", e) 

def loginandcopydir(hostname,uname,pwd,sfile,tfile,recursive,preserve_times):
     try:
        log.info("Establishing ssh connection")
        client = getsshClient()
        client.load_system_host_keys()
        client.connect(hostname) #,username=uname)#,password=pwd)
     except paramiko.AuthenticationException:
        print("Authentication failed, please verify your credentials: %s")
     except paramiko.SSHException as sshException:
        print("Unable to establish SSH connection: %s" % sshException)
     except paramiko.BadHostKeyException as badHostKeyException:
        print("Unable to verify server's host key: %s" % badHostKeyException)
     except Exception as e:
        print(e.args)
     try:
        scpclient = scp.SCPClient(client.get_transport())
        scpclient.put(sfile,tfile,recursive,preserve_times)
     except scp.SCPException as e:
        print("Operation error: %s", e)

# Deprecated 

def _try_passwordless_paramiko(server, keyfile):
    """Try passwordless login with paramiko."""
    if paramiko is None:
        msg = "Paramiko unavailable, "
        if sys.platform == 'win32':
            msg += "Paramiko is required for ssh tunneled connections on Windows."
        else:
            msg += "use OpenSSH."
        raise ImportError(msg)
    username, server, port = _split_server(server)
    client = paramiko.SSHClient()
    client.load_system_host_keys()
    client.set_missing_host_key_policy(paramiko.WarningPolicy())
    try:
        client.connect(server, port, username=username, key_filename=keyfile,
               look_for_keys=True)
    except paramiko.AuthenticationException:
        return False
    else:
        client.close()
        return True 

def brute(self, username, pwd_guess) -> int:
        """
        Throw int status instead of a string response to
        dictate success/failure during authentication.
        """

        status = 0
        try:
            self.client.connect(
                self.address, port=self.port, username=username, password=pwd_guess
            )
        except paramiko.AuthenticationException:
            status = -1

        self.client.close()
        return status 

def _try_passwordless_paramiko(server, keyfile):
    """Try passwordless login with paramiko."""
    if paramiko is None:
        msg = "Paramiko unavailable, "
        if sys.platform == 'win32':
            msg += "Paramiko is required for ssh tunneled connections on Windows."
        else:
            msg += "use OpenSSH."
        raise ImportError(msg)
    username, server, port = _split_server(server)
    client = paramiko.SSHClient()
    client.load_system_host_keys()
    client.set_missing_host_key_policy(paramiko.WarningPolicy())
    try:
        client.connect(server, port, username=username, key_filename=keyfile,
               look_for_keys=True)
    except paramiko.AuthenticationException:
        return False
    else:
        client.close()
        return True 

def check_sshBF(ip):
	print colores.HEADER + "[*][TARGET] SSH connect to " + ip + colores.normal
	paramiko.util.log_to_file("filename.log")
	fail = 0
	user="root"
	for p in passwords:
		ssh = paramiko.SSHClient()
		ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
		try:
			print colores.verde + "|----[INFO] Try user: root password: " + p + colores.normal
			ssh.connect(ip, username=user, password=p, timeout=10)
		except paramiko.AuthenticationException, error:
			print "|----[ERROR] incorrect password... root@" + ip + ":" + p
			continue
		except socket.error, error:
			fail += 1
			print error
			continue 

def execute_async(self, command, callback=None):
        """
        Executes command on remote hosts without blocking

        :type command: str
        :param command: command to be run on remote host
        :type callback: function
        :param callback: function to call when execution completes
        """
        try:
            logger.debug(('{0}: execute async "{1}"'
                          'with callback {2}'.format(self.target_address,
                                                     command,
                                                     callback)))
            future = self.executor.submit(self.execute, command)
            if callback is not None:
                future.add_done_callback(callback)
            return future
        except (AuthenticationException, SSHException,
                ChannelException, SocketError) as ex:
            logger.critical(("{0} execution failed on {1} with exception:"
                             "{2}".format(command, self.target_address,
                                               ex)))
            raise SSHCommandError(self.target_address, command, ex) 

def execute(self, command):
        """
        Executes command on remote hosts

        :type command: str
        :param command: command to be run on remote host
        """
        try:
            if self.ssh.get_transport() is not None:
                logger.debug('{0}: executing "{1}"'.format(self.target_address,
                                                           command))
                stdin, stdout, stderr = self.ssh.exec_command(command)
                return dict(zip(['stdin', 'stdout', 'stderr'],
                                [stdin, stdout, stderr]))
            else:
                raise SSHConnectionError(self.target_address,
                                         "ssh transport is closed")
        except (AuthenticationException, SSHException,
                ChannelException, SocketError) as ex:
            logger.critical(("{0} execution failed on {1} with exception:"
                             "{2}".format(command, self.target_address,
                                               ex)))
            raise SSHCommandError(self.target_address, command, ex) 

def ssh_connect(self, args):
        ssh = self.ssh_client
        dst_addr = args[:2]
        logging.info('Connecting to {}:{}'.format(*dst_addr))

        try:
            ssh.connect(*args, timeout=options.timeout)
        except socket.error:
            raise ValueError('Unable to connect to {}:{}'.format(*dst_addr))
        except paramiko.BadAuthenticationType:
            raise ValueError('Bad authentication type.')
        except paramiko.AuthenticationException:
            raise ValueError('Authentication failed.')
        except paramiko.BadHostKeyException:
            raise ValueError('Bad host key.')

        term = self.get_argument('term', u'') or u'xterm'
        chan = ssh.invoke_shell(term=term)
        chan.setblocking(0)
        worker = Worker(self.loop, ssh, chan, dst_addr)
        worker.encoding = options.encoding if options.encoding else \
            self.get_default_encoding(ssh)
        return worker 

def do_ssh(self, username):
		while not self.passwords.empty():
			time.sleep(0.1)
			password = self.passwords.get()
			ssh = paramiko.SSHClient()
			ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
			try:
				ssh.connect(self.host_ip, port=self.host_port, username=username, password=password, timeout=self.timeout)
				print info_out + ffb + "{} : {:.<50} {}".format(username, password, fgb + "Successful" + sf)
				ssh.close(); exit(0)
			except paramiko.AuthenticationException:
				print ver_out + ffb + "{} : {:.<50} {}".format(username, password, frb + "Failed" + sf)
			except socket.error, e:
				print err_out + ffb + "{} : {:.<50} {}".format(username, password, fcb + "Connection Failed" + sf)
			except paramiko.SSHException: 
				print err_out + ffb + "{} : {:.<50} {}".format(username, password, fbb + "Error" + sf) 

def sftp_conn(self):
        """"""
        try:
            self.transport = paramiko.Transport((self.host, self.port)) 
            self.transport.connect(username = self.username, password = self.password) 
            self.sftp = paramiko.SFTPClient.from_transport(self.transport)
            return True
        except paramiko.AuthenticationException:
            G.log(G.ERROR, "SFTP Authentication failed when connecting to %s" % self.host)
            return False
        except:
            G.log(G.ERROR, "SFTP Could not SSH to %s, waiting for it to start" % self.host)
            return False

    
    #---------------------------------------------------------------------- 

def _try_passwordless_paramiko(server, keyfile):
    """Try passwordless login with paramiko."""
    if paramiko is None:
        msg = "Paramiko unavaliable, "
        if sys.platform == 'win32':
            msg += "Paramiko is required for ssh tunneled connections on Windows."
        else:
            msg += "use OpenSSH."
        raise ImportError(msg)
    username, server, port = _split_server(server)
    client = paramiko.SSHClient()
    client.load_system_host_keys()
    #client.set_missing_host_key_policy(paramiko.WarningPolicy())
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    try:
        client.connect(server, port, username=username, key_filename=keyfile,
               look_for_keys=True)
    except paramiko.AuthenticationException:
        return False
    else:
        client.close()
        return True 

def test_connectivity(self, time_out=None):
        """ Tests if the SSH is active

            Arguments:
            - time_out: Timeout to connect.

            Returns: True if the connection is established or False otherwise

            Raises:
                Exception
        """
        try:
            client, proxy = self.connect(time_out)
            client.close()
            if proxy:
                proxy.close()
            return True
        except paramiko.AuthenticationException:
            raise AuthenticationException("Authentication Error!!")
        except paramiko.SSHException as e:
            if str(e) == "No authentication methods available":
                raise AuthenticationException("Authentication Error!!")
            return False
        except Exception:
            return False 

def connect(self):
        try:
            if not self.use_key_file:
                self.ssh.connect(str(self.machine_name), port=self.port, username=self.username, password=self.password,
                                 timeout=self.timeout)
            else:
                self.ssh.connect(str(self.machine_name), port=self.port, username=self.username,
                                 key_filename=self.key_file, timeout=self.timeout)
        except paramiko.AuthenticationException:
            print str(self.machine_name) + ': authentication failed'
            return None
        except Exception as err:
            print str(self.machine_name) + ': ' + str(err)
            return None 

def test_login_with_exception_set_retval(self):
        self.kernel.do_login = Mock(side_effect=AuthenticationException)

        self.instance.line_login("dummy")
        self.assertIsNotNone(self.instance.retval) 

def ssh_connect(self,ip,user,password,code=0):
		self.ssh.load_system_host_keys()
		self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
		print("[*] Testing user and password from dictionary")
		print("[*] User: %s" %(user))
		print("[*] Pass :%s" %(password))
		try:
			self.ssh.connect(ip,port=22,username=user,password=password,timeout=5)
		except paramiko.AuthenticationException:
			code = 1
		except socket.error as e:
			code = 2
		self.ssh.close()
		return code 

def ssh_connect(self):
        ssh = self.ssh_client

        try:
            args = self.get_args()
        except InvalidValueError as exc:
            raise tornado.web.HTTPError(400, str(exc))

        dst_addr = (args[0], args[1])
        logging.info('Connecting to {}:{}'.format(*dst_addr))

        try:
            ssh.connect(*args, timeout=6)
        except socket.error:
            raise ValueError('Unable to connect to {}:{}'.format(*dst_addr))
        except paramiko.BadAuthenticationType:
            raise ValueError('Bad authentication type.')
        except paramiko.AuthenticationException:
            raise ValueError('Authentication failed.')
        except paramiko.BadHostKeyException:
            raise ValueError('Bad host key.')

        chan = ssh.invoke_shell(term='xterm')
        chan.setblocking(0)
        worker = Worker(self.loop, ssh, chan, dst_addr, self.src_addr)
        worker.encoding = self.get_default_encoding(ssh)
        return worker 

def connect(self):
        while True:
            try:
                log('Trying to connect to server')
                self.ssh.connect(self.server_ip_addr, port=22, username='root', password=self.server_pw, timeout=5)
                log('Connected to server')
                break
            except (paramiko.AuthenticationException, Exception):
                log('Couldnt connect to host yet. Its probably not started yet. Will retry in 20s. This is normal.')
                sleep(20)
        return True 

def prepare_ssh_client(session, vmuuid):
    username = api_helper.get_vm_xscontainer_username(session, vmuuid)
    host = api_helper.get_suitable_vm_ip(session, vmuuid, SSH_PORT)
    log.info("prepare_ssh_client for vm %s, via %s@%s"
             % (vmuuid, username, host))
    client = paramiko.SSHClient()
    pkey = paramiko.rsakey.RSAKey.from_private_key(
        StringIO.StringIO(api_helper.get_idrsa_secret_private(session)))
    client.get_host_keys().clear()
    client.set_missing_host_key_policy(MyHostKeyPolicy(session, vmuuid))
    try:
        client.connect(host, port=SSH_PORT, username=username,
                       pkey=pkey, look_for_keys=False, banner_timeout=300)
    except SshException:
        # This exception is already improved - leave it as it is
        raise
    except paramiko.AuthenticationException as exception:
        message = ("prepare_ssh_client failed to authenticate with private key"
                   " on VM %s" % (vmuuid))
        log.info(message)
        raise AuthenticationException(message)
    except (paramiko.SSHException, socket.error) as exception:
        # reraise as SshException
        raise SshException("prepare_ssh_client: %s" % exception,
                           (sys.exc_info()[2]))
    return client 

def _connect(self):
        self._ssh = paramiko.SSHClient()

        known_host_file = self._known_host_file or os.path.expanduser(
            os.path.join("~", ".ssh", "known_hosts")
        )

        if os.path.exists(known_host_file):
            self._ssh.load_host_keys(known_host_file)

        # and automatically add new host keys for hosts we haven't seen before.
        self._ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

        try:
            self._ssh.connect(self._host, **self._params)
        except paramiko.AuthenticationException as e:
            if self._interactive and 'password' not in self._params:
                # If authentication has failed, and we haven't already tried
                # username/password, and configuration allows it, then try
                # again with username/password.
                if 'username' not in self._params:
                    self._params['username'] = getpass.getuser()
                self._params['password'] = getpass.getpass()
                self._connect()
            else:
                raise paramiko.AuthenticationException(e)

        if self._ssh.get_transport():
            self._sftp = self._ssh.open_sftp() 

def __connect(self):
        try:
            self.__ssh = paramiko.SSHClient()
            self.__ssh.set_missing_host_key_policy(paramiko.WarningPolicy())
            self.__ssh.connect(self.__host, username=self.__user,
                password=self.__password, timeout=self.__timeout)
            LOG.info("Connected to %s", self.__host)
        except paramiko.AuthenticationException:
            LOG.error("Authentication failed when connecting to %s",
                      self.__host)
            raise exceptions.NotAuthorized
        except paramiko.SSHException:
            LOG.error("Could not connect to %s. Giving up", self.__host)
            raise 

def __init__(self, host, ssh_log=False, username=None,
                 password=None, look_for_keys=True, key_filename=None):
        paramiko.SSHClient.__init__(self)
        self.host = host
        self.log = logger.getlogger()
        self.ssh_log = SSH_LOG
        if ssh_log and logger.is_log_level_file_debug():
            paramiko.util.log_to_file(self.ssh_log)

        if key_filename is None:
            self.load_system_host_keys()
        self.set_missing_host_key_policy(paramiko.AutoAddPolicy())

        try:
            self.connect(
                host,
                username=username,
                password=password,
                look_for_keys=look_for_keys,
                key_filename=key_filename)
        except (
                paramiko.BadHostKeyException,
                paramiko.AuthenticationException,
                paramiko.SSHException,
                socket.error,
                BaseException) as exc:
            self.log.error('%s: %s' % (host, str(exc)))
            raise SSH_Exception('Connection Failure - {}'.format(exc)) 

def exec_cmd(self, ip_addr, username, password, cmd,
                 ssh_log=False, look_for_keys=True, key_filename=None):
        self.ssh_log = SSH_LOG
        if ssh_log and logger.is_log_level_file_debug():
            paramiko.util.log_to_file(self.ssh_log)

        ssh = paramiko.SSHClient()
        ssh.load_system_host_keys()
        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        try:
            ssh.connect(
                ip_addr,
                port=self.SWITCH_PORT,
                username=username,
                password=password,
                look_for_keys=look_for_keys,
                key_filename=key_filename)
        except (
                paramiko.BadHostKeyException,
                paramiko.AuthenticationException,
                paramiko.SSHException,
                socket.error,
                BaseException) as exc:
            self.log.error('%s: %s' % (ip_addr, str(exc)))
            raise SSH_Exception('SSH connection Failure - {}'.format(exc))
            # sys.exit(1)
        try:
            _, stdout, stderr = ssh.exec_command(cmd)
        except paramiko.SSHException as exc:
            self.log.error('%s: %s, %s' % (ip_addr, str(exc), stderr.read()))
            sys.exit(1)
        stdout_ = stdout.read()
        stderr_ = stderr.read()
        status = stdout.channel.recv_exit_status()
        ssh.close()
        return status, stdout_, stderr_ 

def wait_for_device(self, countdown, poll_delay):

        dev = None

        # first we need to wait for the device to be 'reachable' via the API.
        # we'll use the probe error to detect if it is or not

        while not dev:
            msg = 'reload-countdown at: {} seconds'.format(countdown)
            self.post_device_status(message=msg, state='AWAIT-ONLINE')
            self.log.info(msg)

            try:
                dev = Device(self.target, user=self.user, passwd=self.passwd,
                             timeout=poll_delay)

            except AuthenticationException as e:
                self.log.info('Authentication exception reported: {} \n args: {}'.format(e, e.args))
                self.exit_results(results=dict(
                    ok=False,
                    error_type='login',
                    message='Unauthorized - check user/password'))

            except NoValidConnectionsError as e:
                countdown -= poll_delay
                if countdown <= 0:
                    self.exit_results(results=dict(
                        ok=False,
                        error_type='login',
                        message='Failed to connect to target %s within reload countdown' % self.target))

                time.sleep(poll_delay)

        self.dev = dev
        self.post_device_facts()

    # ##### -----------------------------------------------------------------------
    # #####
    # #####                           OS install process
    # #####
    # ##### -----------------------------------------------------------------------