Python PYSFTP - 将私钥作为字符串/文本传递而不是传递文件路径

Question

我想将我的实际私钥值作为参数传递，而不是提供文件路径。
到目前为止，我已经使用了以下代码:

def upload_file_to_remote(hostname, port, username, password, private_key_filepath, localpath, remotefolder, host_keys):
    import pysftp
    import os
    
    if password=="None":
        password=None
        
    try:
        
        cnopts = pysftp.CnOpts()
        if str(host_keys).lower() =='none':
            cnopts.hostkeys = None
        else:
            cnopts.hostkeys.load(hostkeys)
        filename = os.path.basename(localpath)
        print(filename)
        remotepath = os.path.join(remotefolder, filename)
        print(remotepath)
        with pysftp.Connection(host=hostname, port=int(port), username=username, password=password, cnopts=cnopts,private_key=private_key_filepath) as sftp:
            print sftp
            sftp.put(localpath, remotepath=remotepath)
    except IOError as e:
        result="SFTP Failed "+str(e)
        return result
    except pysftp.exceptions.ConnectionException as e:
        return "SFTP Failed "+str(e)
    except pysftp.exceptions.CredentialException as e:
        return "SFTP Failed "+str(e)
    except pysftp.exceptions.HostKeysException as e:
        return "SFTP Failed "+str(e)
    except Exception as e:
        return "SFTP Failed "+str(e)
    return {'status':'pass','result' : remotepath}
    
    #print(upload_file_to_remote(hostname, port, username, password, private_key_filepath, localpath, remotefolder,host_keys))


upload_file_to_remote(hostname, port, username, password, private_key_filepath, localpath, remotefolder, host_keys)

请建议某种方式将其作为文本传递。
例子:

private_key='abcdmyprivatekeytext'

upload_file_to_remote(hostname, port, username, password, private_key, localpath, remotefolder, host_keys)

在实际情况下，我会将我的私钥文本放在安全保险库中。

Answer 1

pysftp 可以接受 RSAKey 在 private_key Connection constructor 的论据:

# Set your private key as a string
PRIVATE_KEY = """-----BEGIN RSA PRIVATE KEY-----
...
-----END RSA PRIVATE KEY-----
"""

# Use 'io.StringIO' to read your string as a file-like object.
privkey = io.StringIO(PRIVATE_KEY)

# Use paramiko to create your RSAKey
ki = paramiko.RSAKey.from_private_key(privkey)

# Connect using your key with pysftp
conn = pysftp.Connection(host=HOST, username=USER, private_key=ki)

(最初由@Hana 发布，但现在已删除答案)
此使用 private_key自 pysftp 0.2.9 起，参数不受文档支持，但它有效。不接受其他 key 类型( DSSKey 、 ECDSAKey 、 Ed25519Key )。

如果需要使用其他键类型，直接使用Paramiko:
SSH/SCP through Paramiko with key in string
pysftp 只是 Paramiko 的包装器。
见 pysftp vs. Paramiko