paramiko.PasswordRequiredException: Private key file is encrypted 求大神解决

guibi13305

各位大神，小弟刚接触paramiko,想使用私钥登录，结果包错。求帮助

1、在root下生成 id_rsa
chmod 700 ~/.ssh/
ssh-keygen -t rsa

2、代码部分
#!/usr/bin/python

import paramiko
import socket
import sys,os

host = sys.argv[1]
user = sys.argv[2]
port = int(sys.argv[3])
auth_method = sys.argv[4]

if auth_method == 'PASSWORD':
    password = sys.argv[5]
    cmd = sys.argv[6]
else:
    cmd = sys.argv[5]

s = paramiko.SSHClient()
s.load_system_host_keys()
s.set_missing_host_key_policy(paramiko.AutoAddPolicy())

if auth_method == "SSH_KEY":
    pkey_file='/root/.ssh/id_rsa'
    key_p = paramiko.RSAKey.from_private_key_file(pkey_file)
    s.connect(host,port,user,pkey=key_p,timeout=60)
elif auth_method == "PASSWORD":
    s.connect(host,port,user,password,timeout=60)
stdin,stdout,stderr = s.exec_command(cmd)
cmd_result = stdout.read(),stderr.read()
print '----------Result from %s ------------' % host
for line in cmd_result:
    print line,
s.close()

# ./paramiko.sangle1.py 127.0.0.1 root 22 SSH_KEY ls


报错
Traceback (most recent call last):
  File "./paramiko.sangle1.py", line 29, in <module>
    s.connect(host,port,user,pkey=key_p,timeout=60)
  File "/usr/lib/python2.6/site-packages/paramiko-1.10.1-py2.6.egg/paramiko/client.py", line 337, in connect
    self._auth(username, password, pkey, key_filenames, allow_agent, look_for_keys)
  File "/usr/lib/python2.6/site-packages/paramiko-1.10.1-py2.6.egg/paramiko/client.py", line 528, in _auth
    raise saved_exception
paramiko.PasswordRequiredException: Private key file is encrypted