Python_基于Python同Linux进行交互式操作实现通过堡垒机访问目标机

基于Python同Linux进行交互式操作实现通过堡垒机访问目标机

 

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实现功能 1

测试环境 1

代码实践 2

注意 5

 

实现功能

远程登录Linux堡垒机，同Linux进行交互式操作，访问目标机

测试环境

Win7 64位

Python 3.3.4

paramiko 1.15.2

下载地址：

https://pypi.python.org/pypi/paramiko/1.15.2

https://pan.baidu.com/s/1i4SJ1CL

cryptography-1.0-cp34-none-win_amd64.whl

(如果paramiko可以正常安装完，则不需要安装该类库)

下载地址：

https://pypi.python.org/pypi/cryptography/1.0

https://pan.baidu.com/s/1jIRBJvg

安装好后，找到nt.py(本例中路径为：

Lib\site-packages\pycrypto-2.6.1-py3.4-win-amd64.egg\Crypto\Random\OSRNG\nt.py),修改

import winrandom

为

from Crypto.Random.OSRNG import winrandom

如下

#import winrandom

from Crypto.Random.OSRNG import winrandom

以解决ImportError: No module named 'winrandom'错误

说明：具体文件路径可能还得根据实际报错情况来确定，如下

............(略)

"D:\Program Files\python33\lib\site-packages\Crypto\Random\OSRNG\nt.py", line 28, in

import winrandom

ImportError: No module named 'winrandom'

VS2010

因操作系统而异，可能需要安装VS2010，以解决包依赖问题

需求

SSH登录堡垒机后，根据提示输入相关信息，进入到目标机，如下

代码实践

 

#!/usr/bin/env/ python
#
-*- coding:utf-8 -*-

__author__
=
'shouke'

from

paramiko.client
import
AutoAddPolicy
from

paramiko.client
import
SSHClient

class

MySSHClient:

def

__init__(self):
        self.ssh_client
= SSHClient()

#
连接登录
    def

connect(self,
hostname, port, username, password,
host_via_by_bastion):
        try:
            self.ssh_client.set_missing_host_key_policy(AutoAddPolicy())
            self.ssh_client.connect(hostname=hostname,

port=port,

username=username,

password=password,

timeout=30)
            channel
=
self.ssh_client.invoke_shell()
            channel.settimeout(10)

# 读、写操作超时时间，10秒

            ######################
定制化开发 ###########

            print('正在通过堡垒机：%s
访问目标机：%s'
% (hostname, host_via_by_bastion))
            host_via_by_bastion
= host_via_by_bastion +
'\n'

            prompt_input_list
= [{'Please
enter your ID':'xxx255222\n'},
{'Please
enter your password':

'passwd123\n'},
{'Please
select your app ip':host_via_by_bastion},
{'select
your user for login':'1\n'}]

end_flag1
=
']$'
            end_flag2
=
']#'

            stdout
=
''  #
存放每次执行读取的内容
            for

item
in
prompt_input_list:
                prompt
=
list(item.keys())[0]
                input
= item[prompt]

flag
=
False
                while

stdout.find(prompt) == -1:
                    try:
                        stdout
+= channel.recv(65535).decode('utf-8')#.decode('utf-8')
                        flag
=
True
                    except

Exception
as
e:
                        print('通过堡垒机：%s
访问目标机：%s
失败：%s'
% (hostname, host_via_by_bastion, e))
                        flag
=
False
                        break
                if

flag:
                    channel.send(input)
                else:

# 未找到了对应提示
                    return

[False,

'通过堡垒机：%s
访问目标机：%s
失败，可能是读取命令返回结果超时，或者没找到对应输入提示'  %
(hostname, host_via_by_bastion)]

flag
=
False
            while
not
(stdout.rstrip().endswith(end_flag1)
or
stdout.rstrip().endswith(end_flag2)):
                try:
                    stdout
= channel.recv(2048).decode('utf-8')
                    flag
=
True
                except

Exception
as
e:
                    print('通过堡垒机：%s
访问目标机：%s
失败：%s'
% (hostname, host_via_by_bastion, e))
                    flag
=
False
                    break
            if

flag:
                return

[True,

'']
            else:

# 未找到了对应提示
                return

[False,

'没出现成功登录提示符 ]$
或 ]#
']
            channel.close()
            return
 [True,

'']
        except

Exception
as
e:
            return

[False,

'%s'
% e]

#
远程执行命令
    def

exec_command(self,
command, target_host, bastion_host):
        try:
            channel
=
self.ssh_client.invoke_shell()
            channel.settimeout(30)

# 读、写操作超时时间，30秒

            end_flag1
=
']$'
            end_flag2
=
']#'
            ################
定制化开发 ##############################
            if

bastion_host !=
'':
                print('正在通过堡垒机：%s
访问目标机：%s'
% (bastion_host, target_host))
                target_host_input
= target_host +
'\n'
                prompt_input_list
= [{'Please
enter your ID':'01367599\n'},
{'Please
enter your password':

'Huozhe2020\n'},
{'Please
select your app ip':target_host_input},
{'select
your user for login':'1\n'}]

stdout
=
''  #
存放每次执行读取的内容
                for

item
in
prompt_input_list:
                    prompt
=
list(item.keys())[0]
                    input
= item[prompt]

flag
=
False
                    while

stdout.find(prompt) == -1:
                        try:
                            stdout
+= channel.recv(65535).decode('utf-8')#.decode('utf-8')
                            flag
=
True
                        except

Exception
as
e:
                            print('通过堡垒机：%s
访问目标机：%s
失败：%s'
%  (bastion_host, target_host,
e))
                            flag
=
False
                            break
                    if

flag:
                        channel.send(input)
                    else:

# 未找到了对应提示
                        print('通过堡垒机：%s
访问目标机：%s
失败，可能是读取命令返回结果超时，或者没找到对应输入提示'  %
 (bastion_host, target_host))
                        #
return [False, '通过堡垒机：%s 访问目标机：%s 失败，可能是读取命令返回结果超时，或者没找到对应输入提示'
 %  (bastion_host,
target_host)]
                        return


                while
not
(stdout.rstrip().endswith(end_flag1)
or
stdout.rstrip().endswith(end_flag2)):
                    try:
                        stdout
= channel.recv(2048).decode('utf-8')
                    except

Exception
as
e:
                        print('通过堡垒机：%s
访问目标机：%s
失败：没出现成功登录提示符 ]$ 或 ]#'
% (bastion_host, target_host))
                        return

            channel.send(command+'\n')

command_res
=
''  #
存放每次执行读取的内容
            while
not
(command_res.endswith(end_flag1)
or
command_res.endswith(end_flag2)):
                try:
                    command_res
= channel.recv(2048).decode('utf-8').strip()
                except

Exception
as
e:
                    print('在目标机(IP:
%s)上进行读取操作超时'
% target_host)
                    break
            channel.close()
        except

Exception
as
e:
           print('针对目标机：%s
执行命令: %s
出错 %s'
% (target_host, command, e))