Robot Framework - SSH 库 - 使用公钥登录

我正在尝试使用来自带有 SSH 库的 Robot Framework的私钥创建到托管在 AWS 云上的机器的 SSH 连接。使用的关键字是 - Login With Public Key。以下是当前使用红色编辑器在 Eclipse 中编写的代码

*** Variables ***
${hostname}    <hostname>
${username}    <username>


*** Test Cases ***
ConnectionToJump
    Set Log Level    DEBUG
    Enable Ssh Logging    logfile.txt
    Log    Starting the connection to jump server
    ${connectionIndex}    Open Connection    ${hostname}    port=22
    ${output}    Login With Public Key    ${username}    C:/Users/<username>/.ssh/id_rsa.ppk
    Log    ${output}

但不幸的是，这在 Eclipse 控制台中引发了我的错误，看起来像

Starting test: Demo-Telemetry.TestCases.ConnectToJumpServer.ConnectionToJump
20210616 12:52:54.448 : INFO : Log level changed from INFO to DEBUG.
20210616 12:52:54.449 : INFO : SSH log is written to <a href="logfile.txt">file</a>.
20210616 12:52:54.449 : INFO : Starting the connection to jump server
20210616 12:52:54.450 : INFO : ${connectionIndex} = 1
20210616 12:52:54.451 : INFO : Logging into '<hostname>:22' as '<username>'.
20210616 12:52:54.643 : DEBUG : Adding ecdsa-sha2-nistp256 host key for <hostname>: b'db779d1ed1b0995ec97b1cbe96c27c5f'
20210616 12:52:54.888 : FAIL : Login with public key failed for user '<username>'.
20210616 12:52:54.888 : DEBUG : Traceback (most recent call last):
  File "D:\Program Files (x86)\Python\Python39\Lib\site-packages\SSHLibrary\library.py", line 1043, in login_with_public_key
    return self._login(self.current.login_with_public_key, username,
  File "D:\Program Files (x86)\Python\Python39\Lib\site-packages\SSHLibrary\library.py", line 1059, in _login
    raise RuntimeError(e)
Ending test: Demo-Telemetry.TestCases.ConnectToJumpServer.ConnectionToJump

从logfile.txt查看SSH日志，信息如下

DEB [20210616-12:52:54.532] thr=1   paramiko.transport: starting thread (client mode): 0xfdaa1340
DEB [20210616-12:52:54.533] thr=1   paramiko.transport: Local version/idstring: SSH-2.0-paramiko_2.7.2
DEB [20210616-12:52:54.558] thr=1   paramiko.transport: Remote version/idstring: SSH-2.0-OpenSSH_7.4
INF [20210616-12:52:54.558] thr=1   paramiko.transport: Connected (version 2.0, client OpenSSH_7.4)
DEB [20210616-12:52:54.607] thr=1   paramiko.transport: kex algos:['diffie-hellman-group-exchange-sha256', 'diffie-hellman-group14-sha256', 'diffie-hellman-group16-sha512', 'ecdh-sha2-nistp256', 'ecdh-sha2-nistp384', 'ecdh-sha2-nistp521'] server key:['ssh-rsa', 'rsa-sha2-512', 'rsa-sha2-256', 'ecdsa-sha2-nistp256', 'ssh-dss'] client encrypt:['[email protected]', '[email protected]', 'aes128-cbc', 'aes192-cbc', 'aes256-cbc', 'aes128-ctr', 'aes192-ctr', 'aes256-ctr'] server encrypt:['[email protected]', '[email protected]', 'aes128-cbc', 'aes192-cbc', 'aes256-cbc', 'aes128-ctr', 'aes192-ctr', 'aes256-ctr'] client mac:['[email protected]', '[email protected]', 'hmac-sha2-512', 'hmac-sha2-256'] server mac:['[email protected]', '[email protected]', 'hmac-sha2-512', 'hmac-sha2-256'] client compress:['none', '[email protected]'] server compress:['none', '[email protected]'] client lang:[''] server lang:[''] kex follows?False
DEB [20210616-12:52:54.607] thr=1   paramiko.transport: Kex agreed: ecdh-sha2-nistp256
DEB [20210616-12:52:54.607] thr=1   paramiko.transport: HostKey agreed: ecdsa-sha2-nistp256
DEB [20210616-12:52:54.607] thr=1   paramiko.transport: Cipher agreed: aes128-ctr
DEB [20210616-12:52:54.608] thr=1   paramiko.transport: MAC agreed: hmac-sha2-256
DEB [20210616-12:52:54.608] thr=1   paramiko.transport: Compression agreed: none
DEB [20210616-12:52:54.642] thr=1   paramiko.transport: kex engine KexNistp256 specified hash_algo <built-in function openssl_sha256>
DEB [20210616-12:52:54.642] thr=1   paramiko.transport: Switch to new keys ...
DEB [20210616-12:52:54.643] thr=2   paramiko.transport: Adding ecdsa-sha2-nistp256 host key for sshhost.fftest.tst.zipbo.mop-test.comp.db.de: b'db779d1ed1b0995ec97b1cbe96c27c5f'
DEB [20210616-12:52:54.747] thr=1   paramiko.transport: userauth is OK
DEB [20210616-12:52:54.782] thr=1   paramiko.transport: Authentication type (password) not permitted.
DEB [20210616-12:52:54.783] thr=1   paramiko.transport: Allowed methods: ['publickey']
DEB [20210616-12:52:54.815] thr=1   paramiko.transport: userauth is OK
DEB [20210616-12:52:54.857] thr=1   paramiko.transport: Authentication type (none) not permitted.
DEB [20210616-12:52:54.857] thr=1   paramiko.transport: Allowed methods: ['publickey']
DEB [20210616-12:52:54.884] thr=1   paramiko.transport: userauth is OK
ERR [20210616-12:52:54.884] thr=1   paramiko.transport: Unknown exception: 'NoneType' object has no attribute 'public_blob'
ERR [20210616-12:52:54.886] thr=1   paramiko.transport: Traceback (most recent call last):
ERR [20210616-12:52:54.886] thr=1   paramiko.transport:   File "D:\Program Files (x86)\Python\Python39\Lib\site-packages\paramiko\transport.py", line 2109, in run
ERR [20210616-12:52:54.886] thr=1   paramiko.transport:     handler(self.auth_handler, m)
ERR [20210616-12:52:54.886] thr=1   paramiko.transport:   File "D:\Program Files (x86)\Python\Python39\Lib\site-packages\paramiko\auth_handler.py", line 289, in _parse_service_accept
ERR [20210616-12:52:54.886] thr=1   paramiko.transport:     if self.private_key.public_blob:
ERR [20210616-12:52:54.886] thr=1   paramiko.transport: AttributeError: 'NoneType' object has no attribute 'public_blob'

我能够成功地使用 PuTTY 和 MobaXterm 使用相同的密钥文件手动创建连接。

你能帮我理解我在做什么错误或者需要改变什么才能成功连接吗？

谢谢