def encode_tlv(self, ident, val):
# no need to support ident > 31 here
self.content += byte_chr(ident)
if len(val) > 0x7f:
lenstr = paramiko.util.deflate_long(len(val))
self.content += byte_chr(0x80 + len(lenstr)) + lenstr
else:
self.content += byte_chr(len(val))
self.content += val
python类util()的实例源码
def encode(self, x):
if type(x) is bool:
if x:
self.encode_tlv(1, max_byte)
else:
self.encode_tlv(1, zero_byte)
elif (type(x) is int) or (type(x) is long):
self.encode_tlv(2, paramiko.util.deflate_long(x))
elif type(x) is str:
self.encode_tlv(4, x)
elif (type(x) is list) or (type(x) is tuple):
self.encode_tlv(0x30, self.encode_sequence(x))
else:
raise BERException('Unknown type for encoding: %s' % repr(type(x)))
def _set_transport(self, transport):
self.transport = transport
self.logger = paramiko.util.get_logger(self.transport.get_log_channel())
def _parse_debug(self, m):
m.get_boolean() # always_display
msg = m.get_string()
m.get_string() # language
self._log(DEBUG, 'Debug msg: {0}'.format(paramiko.util.safe_string(msg)))
def __init__(self, sock):
"""
Create an SFTP client from an existing `.Channel`. The channel
should already have requested the ``"sftp"`` subsystem.
An alternate way to create an SFTP client context is by using
`from_transport`.
:param .Channel sock: an open `.Channel` using the ``"sftp"`` subsystem
:raises:
`.SSHException` -- if there's an exception while negotiating sftp
"""
BaseSFTP.__init__(self)
self.sock = sock
self.ultra_debug = False
self.request_number = 1
# lock for request_number
self._lock = threading.Lock()
self._cwd = None
# request # -> SFTPFile
self._expecting = weakref.WeakValueDictionary()
if type(sock) is Channel:
# override default logger
transport = self.sock.get_transport()
self.logger = paramiko.util.get_logger(
transport.get_log_channel() + '.sftp')
self.ultra_debug = transport.get_hexdump()
try:
server_version = self._send_version()
except EOFError:
raise SSHException('EOF during negotiation')
self._log(
INFO,
'Opened sftp connection (server version %d)' % server_version)
def set_log_channel(self, name):
"""
Set the channel for this transport's logging. The default is
``"paramiko.transport"`` but it can be set to anything you want. (See
the `.logging` module for more info.) SSH Channels will log to a
sub-channel of the one specified.
:param str name: new channel name for logging
.. versionadded:: 1.1
"""
self.log_name = name
self.logger = util.get_logger(name)
self.packetizer.set_log(self.logger)
def _parse_debug(self, m):
always_display = m.get_boolean()
msg = m.get_string()
lang = m.get_string()
self._log(DEBUG, 'Debug msg: {0}'.format(util.safe_string(msg)))
def set_log_channel(self, name):
"""
Set the channel for this transport's logging. The default is
``"paramiko.transport"`` but it can be set to anything you want. (See
the `.logging` module for more info.) SSH Channels will log to a
sub-channel of the one specified.
:param str name: new channel name for logging
.. versionadded:: 1.1
"""
self.log_name = name
self.logger = util.get_logger(name)
self.packetizer.set_log(self.logger)
def _parse_debug(self, m):
always_display = m.get_boolean()
msg = m.get_string()
lang = m.get_string()
self._log(DEBUG, 'Debug msg: {0}'.format(util.safe_string(msg)))
def decode_next(self):
if self.idx >= len(self.content):
return None
ident = byte_ord(self.content[self.idx])
self.idx += 1
if (ident & 31) == 31:
# identifier > 30
ident = 0
while self.idx < len(self.content):
t = byte_ord(self.content[self.idx])
self.idx += 1
ident = (ident << 7) | (t & 0x7f)
if not (t & 0x80):
break
if self.idx >= len(self.content):
return None
# now fetch length
size = byte_ord(self.content[self.idx])
self.idx += 1
if size & 0x80:
# more complimicated...
# FIXME: theoretically should handle indefinite-length (0x80)
t = size & 0x7f
if self.idx + t > len(self.content):
return None
size = paramiko.util.inflate_long(
self.content[self.idx: self.idx + t], True)
self.idx += t
if self.idx + size > len(self.content):
# can't fit
return None
data = self.content[self.idx: self.idx + size]
self.idx += size
# now switch on id
if ident == 0x30:
# sequence
return self.decode_sequence(data)
elif ident == 2:
# int
return paramiko.util.inflate_long(data)
else:
# 1: boolean (00 false, otherwise true)
raise BERException(
'Unknown ber encoding type %d (robey is lazy)' % ident)
def __init__(self, chanid):
"""
Create a new channel. The channel is not associated with any
particular session or `.Transport` until the Transport attaches it.
Normally you would only call this method from the constructor of a
subclass of `.Channel`.
:param int chanid:
the ID of this channel, as passed by an existing `.Transport`.
"""
#: Channel ID
self.chanid = chanid
#: Remote channel ID
self.remote_chanid = 0
#: `.Transport` managing this channel
self.transport = None
#: Whether the connection is presently active
self.active = False
self.eof_received = 0
self.eof_sent = 0
self.in_buffer = BufferedPipe()
self.in_stderr_buffer = BufferedPipe()
self.timeout = None
#: Whether the connection has been closed
self.closed = False
self.ultra_debug = False
self.lock = threading.Lock()
self.out_buffer_cv = threading.Condition(self.lock)
self.in_window_size = 0
self.out_window_size = 0
self.in_max_packet_size = 0
self.out_max_packet_size = 0
self.in_window_threshold = 0
self.in_window_sofar = 0
self.status_event = threading.Event()
self._name = str(chanid)
self.logger = paramiko.util.get_logger('paramiko.transport')
self._pipe = None
self.event = threading.Event()
self.event_ready = False
self.combine_stderr = False
self.exit_status = -1
self.origin_addr = None
