“没有找到……的主机密钥"在 pysftp 代码中，即使 cnopts.hostkeys 设置为 None [英] "No hostkey for ... found" in pysftp code even though cnopts.hostkeys is set to None

问题描述

背景

要通过 SFTP 连接到另一台服务器，我在 UNIX 命令行中使用以下命令:

To SFTP across to another server I use the following command in the UNIX command line:

sftp -i /some_dir/another_dir/key -oPort=12345 user@12.123.456.789

我想要达到的目标

我想将此转换为与 一起使用的命令PySFTP.

I want to convert this to command to be used with PySFTP.

我的尝试

import pysftp
cnopts = pysftp.CnOpts()
cnopts.hostkeys = None

# source: https://pysftp.readthedocs.io/en/release_0.2.7/pysftp.html
srv = pysftp.Connection("user@12.123.456.789", port="12345",  
                         private_key_pass="/some_dir/another_dir/key")

遇到错误

File "./aws_sql_dumper.py", line 14, in <module>
    srv = pysftp.Connection("user@12.123.456.789", port="12345",  private_key_pass="/some_dir/another_dir/key")
  File "/usr/local/lib/python3.4/dist-packages/pysftp/__init__.py", line 132, in __init__
    self._tconnect['hostkey'] = self._cnopts.get_hostkey(host)
  File "/usr/local/lib/python3.4/dist-packages/pysftp/__init__.py", line 71, in get_hostkey
    raise SSHException("No hostkey for host %s found." % host)
paramiko.ssh_exception.SSHException: No hostkey for host user@12.123.456.789 found.
Exception ignored in: <bound method Connection.__del__ of <pysftp.Connection object at 0x7f6067c7ea20>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/pysftp/__init__.py", line 1013, in __del__
    self.close()
  File "/usr/local/lib/python3.4/dist-packages/pysftp/__init__.py", line 784, in close
    if self._sftp_live:
AttributeError: 'Connection' object has no attribute '_sftp_live'

研究完成

我已阅读以下内容:

• pysftp 0.2.9 中断构建
• 欢迎使用 pysftp 的文档！
• 陷入 pysftp 困境- 需要帮助
• S/O - 使用 pysftp 验证主机密钥

问题

我认为我在做一些根本性的错误.如何采用UNIX命令行中使用的SFTP命令被pysftp接受/解释?

I think I am doing something fundamental wrong. How can I adopt the SFTP command used in UNIX command line to be accepted/interpretted by pysftp?

变化

我改变了一些东西

import pysftp
cnopts = pysftp.CnOpts()
cnopts.hostkeys.load('/home/some_dir/.ssh/known_hosts')

# source: https://pysftp.readthedocs.io/en/release_0.2.7/pysftp.html
srv = pysftp.Connection("user@12.123.456.789", port="12345",  
                         private_key="/some_dir/another_dir/key", cnopts=cnopts)

修改后的输出

Traceback (most recent call last):
  File "./aws_sql_dumper.py", line 17, in <module>
    srv = pysftp.Connection("user@12.123.456.789", port="12345",  private_key="/some_dir/another_dir/key", cnopts=cnopts)
  File "/usr/local/lib/python3.4/dist-packages/pysftp/__init__.py", line 132, in __init__
    self._tconnect['hostkey'] = self._cnopts.get_hostkey(host)
  File "/usr/local/lib/python3.4/dist-packages/pysftp/__init__.py", line 71, in get_hostkey
    raise SSHException("No hostkey for host %s found." % host)
paramiko.ssh_exception.SSHException: No hostkey for host user@12.123.456.789" found.
Exception ignored in: <bound method Connection.__del__ of <pysftp.Connection object at 0x7f8120dc6438>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/pysftp/__init__.py", line 1013, in __del__
    self.close()
  File "/usr/local/lib/python3.4/dist-packages/pysftp/__init__.py", line 784, in close
    if self._sftp_live:
AttributeError: 'Connection' object has no attribute '_sftp_live

推荐答案

经过多次尝试和错误，转换以下 SFTP 命令放入终端:

After much trial and error, converting the following SFTP command put into the terminal:

sftp -i /some_dir/another_dir/key -oPort=12345 user@12.123.456.789

可以翻译*为:

paramiko.SSHClient().connect(hostname='12.123.456.789', username='user', port=12345,
                             key_filename='/some_dir/another_dir/key')

整个精简代码是:

#!/usr/bin/python3

import paramiko

try:
    client = paramiko.SSHClient()
    client.load_system_host_keys()
    client.set_missing_host_key_policy(paramiko.WarningPolicy)
    client.connect(hostname='12.123.456.789', username='user', port=12345, 
                   key_filename='/some_dir/another_dir/key')

    # -------------------------- [ just for testing ] --------------------------
    stdin, stdout, stderr = client.exec_command('ls -la')   # THIS IS FOR TESTING
    print(stdout.read())                                    # AND PRINTING OUT

finally:
    client.close()

这篇关于“没有找到……的主机密钥"在 pysftp 代码中，即使 cnopts.hostkeys 设置为 None的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！