python pexpect ssh 远程登录服务器的方法

使用了python中的pexpect模块，在测试代码之前，可输入python进入交互界面，输入help('pexpect')，查询是否本地含有pexpect模块。

如果没有，linux系统输入 easy_install pexpect便可自动安装。

测试代码，连接127.0.0.1

下面是我手动连接127.0.0.1， 发现只有在首次使用ssh连接127.0.0.1时，需要输入yes or no ，而后再次使用ssh ,则不需要再次输入yes

直接输入密码即可。

后续测试代码是二次链接，无需查询是否需要输入yes or no

import pexpect
def send_command(child, cmd):
 child.sendline(cmd)
 child.expect(PROMT)
 print child.before
def connect(user, host, password):
 ssh_newkey = 'Ary you sure you want to continue connecting'
 connStr = 'ssh ' + user + '@' + host
 child = pexpect.spawn(connStr)
 '''
 ret = child.expect([pexpect.TIMEOUT, ssh_newkey])
 if ret == 0:
   print "[-] Error 1"
   return
 elif ret == 1:
   child.sendline('yes')
 '''
 res = child.expect([pexpect.TIMEOUT, '[P|p]assword:'])
 if res == 0:
   print "[-] Error 2"
   return
 elif res == 1:
   child.sendline(password)
 child.expect(PROMT)
 return child
def main():
 host = '127.0.0.1'#测试主机ip或者主机名
 user = 'root'#测试账号
 password = 'root'#测试密码
 child = connect(user, host, password)
 send_command(child, 'w')
if __name__ == '__main__':
 main()

可以用pxssh模块更简单来完成ssh的连接

from pexpect import pxssh
def send_command(s, cmd):
 s.sendline(cmd)
 s.prompt()
 print s.before
def connect(host, user, password):
 try:
   s = pxssh.pxssh()
   s.login(host, user, password)
   return s
 except:
   print "error"
   exit(0)
def main():
 s = connect('127.0.0.1', 'root', '15110506010')
 send_command(s, 'whoami')
if __name__ == '__main__':
 main()

批量连接肉鸡。

from pexpect import pxssh
botnet = []
class client:
def __init__(self, user, host, password):
self.user=user
self.host=host
self.password=password
self.child=self.connect()
def connect(self):
try:
s = pxssh.pxssh()
s.login(self.host, self.user, self.password)
return s
except Exception, e:
print "Error *" + str(e)
def send_command(self, cmd):
self.child.sendline(cmd)
self.child.prompt()
return self.child.before
def addclient(user, host, password):
c = client(user, host, password)
botnet.append(c)
def botnetcommand(command):
for c in botnet:
output = c.send_command(command)
print "ip: " + str(c.host)
print output
def main():
addclient('root', '127.0.0.1', 'toor')
addclient('root', '****', '*****')
botnetcommand('pwd')
if __name__=='__main__':
main()

来源：https://blog.csdn.net/AcSuccess/article/details/72867959