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210 lines
7.4 KiB
210 lines
7.4 KiB
import re
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import time
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import paramiko
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from sshtunnel import SSHTunnelForwarder
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class OldSSHTransport(paramiko.transport.Transport):
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_preferred_pubkeys = (
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"ssh-ed25519",
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"ecdsa-sha2-nistp256",
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"ecdsa-sha2-nistp384",
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"ecdsa-sha2-nistp521",
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"ssh-rsa",
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"rsa-sha2-256",
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"rsa-sha2-512",
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"ssh-dss",
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)
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def common_argument_spec():
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options = dict(
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login_host=dict(type='str', required=False, default='localhost'),
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login_port=dict(type='int', required=False, default=22),
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login_user=dict(type='str', required=False, default='root'),
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login_password=dict(type='str', required=False, no_log=True),
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login_secret_type=dict(type='str', required=False, default='password'),
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login_private_key_path=dict(type='str', required=False, no_log=True),
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first_conn_delay_time=dict(type='float', required=False, default=0.5),
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gateway_args=dict(type='str', required=False, default=''),
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become=dict(type='bool', default=False, required=False),
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become_method=dict(type='str', required=False),
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become_user=dict(type='str', required=False),
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become_password=dict(type='str', required=False, no_log=True),
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become_private_key_path=dict(type='str', required=False, no_log=True),
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old_ssh_version=dict(type='bool', default=False, required=False),
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)
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return options
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class SSHClient:
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TIMEOUT = 20
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SLEEP_INTERVAL = 2
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COMPLETE_FLAG = 'complete'
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def __init__(self, module):
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self.module = module
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self.channel = None
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self.is_connect = False
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self.gateway_server = None
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self.client = paramiko.SSHClient()
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self.client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
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self.connect_params = self.get_connect_params()
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def get_connect_params(self):
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params = {
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'allow_agent': False, 'look_for_keys': False,
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'hostname': self.module.params['login_host'],
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'port': self.module.params['login_port'],
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'key_filename': self.module.params['login_private_key_path'] or None
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}
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if self.module.params['become']:
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params['username'] = self.module.params['become_user']
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params['password'] = self.module.params['become_password']
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params['key_filename'] = self.module.params['become_private_key_path'] or None
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else:
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params['username'] = self.module.params['login_user']
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params['password'] = self.module.params['login_password']
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params['key_filename'] = self.module.params['login_private_key_path'] or None
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if self.module.params['old_ssh_version']:
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params['transport_factory'] = OldSSHTransport
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return params
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def _get_channel(self):
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self.channel = self.client.invoke_shell()
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# 读取首次登陆终端返回的消息
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self.channel.recv(2048)
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# 网络设备一般登录有延迟，等终端有返回后再执行命令
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delay_time = self.module.params['first_conn_delay_time']
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time.sleep(delay_time)
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@staticmethod
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def _is_match_user(user, content):
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# 正常命令切割后是[命令，用户名，交互前缀]
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content_list = content.split() if len(content.split()) >= 3 else None
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return content_list and user in content_list
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def switch_user(self):
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self._get_channel()
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if not self.module.params['become']:
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return
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method = self.module.params['become_method']
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username = self.module.params['login_user']
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if method == 'sudo':
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switch_method = 'sudo su -'
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password = self.module.params['become_password']
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elif method == 'su':
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switch_method = 'su -'
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password = self.module.params['login_password']
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else:
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self.module.fail_json(msg='Become method %s not support' % method)
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return
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commands = [f'{switch_method} {username}', password]
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su_output, err_msg = self.execute(commands)
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if err_msg:
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return err_msg
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i_output, err_msg = self.execute(
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[f'whoami && echo "{self.COMPLETE_FLAG}"'],
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validate_output=True
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)
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if err_msg:
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return err_msg
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if self._is_match_user(username, i_output):
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err_msg = ''
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else:
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err_msg = su_output
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return err_msg
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def local_gateway_prepare(self):
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gateway_args = self.module.params['gateway_args'] or ''
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pattern = r"(?:sshpass -p ([^ ]+))?\s*ssh -o Port=(\d+)\s+-o StrictHostKeyChecking=no\s+([\w@]+)@([" \
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r"\d.]+)\s+-W %h:%p -q(?: -i (.+))?'"
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match = re.search(pattern, gateway_args)
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if not match:
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return
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password, port, username, address, private_key_path = match.groups()
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password = password if password else None
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private_key_path = private_key_path if private_key_path else None
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remote_hostname = self.module.params['login_host']
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remote_port = self.module.params['login_port']
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server = SSHTunnelForwarder(
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(address, int(port)),
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ssh_username=username,
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ssh_password=password,
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ssh_pkey=private_key_path,
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remote_bind_address=(remote_hostname, remote_port)
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)
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server.start()
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self.connect_params['hostname'] = '127.0.0.1'
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self.connect_params['port'] = server.local_bind_port
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self.gateway_server = server
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def local_gateway_clean(self):
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gateway_server = self.gateway_server
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if not gateway_server:
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return
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try:
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gateway_server.stop()
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except Exception:
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pass
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def before_runner_start(self):
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self.local_gateway_prepare()
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def after_runner_end(self):
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self.local_gateway_clean()
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def connect(self):
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try:
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self.before_runner_start()
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self.client.connect(**self.connect_params)
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self.is_connect = True
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err_msg = self.switch_user()
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self.after_runner_end()
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except Exception as err:
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err_msg = str(err)
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return err_msg
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def _get_recv(self, size=1024, encoding='utf-8'):
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output = self.channel.recv(size).decode(encoding)
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return output
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def execute(self, commands, validate_output=False):
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if not self.is_connect:
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self.connect()
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output, error_msg = '', ''
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try:
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for command in commands:
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self.channel.send(command + '\n')
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if not validate_output:
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time.sleep(self.SLEEP_INTERVAL)
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output += self._get_recv()
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continue
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start_time = time.time()
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while self.COMPLETE_FLAG not in output:
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if time.time() - start_time > self.TIMEOUT:
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error_msg = output
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print("切换用户操作超时，跳出循环。")
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break
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time.sleep(self.SLEEP_INTERVAL)
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received_output = self._get_recv().replace(f'"{self.COMPLETE_FLAG}"', '')
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output += received_output
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except Exception as e:
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error_msg = str(e)
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return output, error_msg
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def __del__(self):
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try:
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self.channel.close()
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self.client.close()
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except Exception:
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pass
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