# Path: ncclient/transport/errors.py
# class AuthenticationError(TransportError):
#     pass
# 
# class SessionCloseError(TransportError):
# 
#     def __init__(self, in_buf, out_buf=None):
#         msg = 'Unexpected session close'
#         if in_buf:
#             msg += '\nIN_BUFFER: `%s`' % in_buf
#         if out_buf:
#             msg += ' OUT_BUFFER: `%s`' % out_buf
#         SSHError.__init__(self, msg)
# 
# class SSHError(TransportError):
#     pass
# 
# class SSHUnknownHostError(SSHError):
# 
#     def __init__(self, host, fingerprint):
#         SSHError.__init__(self, 'Unknown host key [%s] for [%s]' % (fingerprint, host))
#         self.host = host
#         self.fingerprint = fingerprint
# 
# class NetconfFramingError(TransportError):
#     pass


import base64
import getpass
import os
import re
import six
import sys
import socket
import threading
    import selectors
    import selectors2 as selectors
import paramiko
import logging
from binascii import hexlify
from ncclient.capabilities import Capabilities
from ncclient.logging_ import SessionLoggerAdapter
from ncclient.transport.errors import AuthenticationError, SessionCloseError, SSHError, SSHUnknownHostError, NetconfFramingError
from ncclient.transport.session import Session
from ncclient.transport.session import NetconfBase
from ncclient.transport.parser import DefaultXMLParser
from ncclient.transport.parser import SAXFilterXMLNotFoundError
    from six import StringIO
    from io import BytesIO as StringIO
            if os.path.isfile(rsa_key):
                keyfiles.append((paramiko.RSAKey, rsa_key))
            if os.path.isfile(dsa_key):
                keyfiles.append((paramiko.DSSKey, dsa_key))
            if os.path.isfile(ecdsa_key):
                keyfiles.append((paramiko.ECDSAKey, ecdsa_key))

        for cls, filename in keyfiles:
            try:
                key = cls.from_private_key_file(filename, password)
                self.logger.debug("Trying discovered key %s in %s",
                                  hexlify(key.get_fingerprint()), filename)
                self._transport.auth_publickey(username, key)
                return
            except Exception as e:
                saved_exception = e
                self.logger.debug(e)

        if password is not None:
            try:
                self._transport.auth_password(username, password)
                return
            except Exception as e:
                saved_exception = e
                self.logger.debug(e)

        if saved_exception is not None:
            # need pep-3134 to do this right
            raise AuthenticationError(repr(saved_exception))


# Path: ncclient/transport/errors.py
# class AuthenticationError(TransportError):
#     pass
# 
# class SessionCloseError(TransportError):
# 
#     def __init__(self, in_buf, out_buf=None):
#         msg = 'Unexpected session close'
#         if in_buf:
#             msg += '\nIN_BUFFER: `%s`' % in_buf
#         if out_buf:
#             msg += ' OUT_BUFFER: `%s`' % out_buf
#         SSHError.__init__(self, msg)
# 
# class SSHError(TransportError):
#     pass
# 
# class SSHUnknownHostError(SSHError):
# 
#     def __init__(self, host, fingerprint):
#         SSHError.__init__(self, 'Unknown host key [%s] for [%s]' % (fingerprint, host))
#         self.host = host
#         self.fingerprint = fingerprint
# 
# class NetconfFramingError(TransportError):
#     pass


# Path: ncclient/transport/ssh.py
import base64
import getpass
import os
import re
import six
import sys
import socket
import threading
    import selectors
    import selectors2 as selectors
import paramiko
import logging
from binascii import hexlify
from ncclient.capabilities import Capabilities
from ncclient.logging_ import SessionLoggerAdapter
from ncclient.transport.errors import AuthenticationError, SessionCloseError, SSHError, SSHUnknownHostError, NetconfFramingError
from ncclient.transport.session import Session
from ncclient.transport.session import NetconfBase
from ncclient.transport.parser import DefaultXMLParser
from ncclient.transport.parser import SAXFilterXMLNotFoundError
    from six import StringIO
    from io import BytesIO as StringIO

            if os.path.isfile(rsa_key):
                keyfiles.append((paramiko.RSAKey, rsa_key))
            if os.path.isfile(dsa_key):
                keyfiles.append((paramiko.DSSKey, dsa_key))
            if os.path.isfile(ecdsa_key):
                keyfiles.append((paramiko.ECDSAKey, ecdsa_key))

        for cls, filename in keyfiles:
            try:
                key = cls.from_private_key_file(filename, password)
                self.logger.debug("Trying discovered key %s in %s",
                                  hexlify(key.get_fingerprint()), filename)
                self._transport.auth_publickey(username, key)
                return
            except Exception as e:
                saved_exception = e
                self.logger.debug(e)

        if password is not None:
            try:
                self._transport.auth_password(username, password)
                return
            except Exception as e:
                saved_exception = e
                self.logger.debug(e)

        if saved_exception is not None:
            # need pep-3134 to do this right
            raise AuthenticationError(repr(saved_exception))


        raise AuthenticationError("No authentication methods available")