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240 lines
7.7 KiB
Python
240 lines
7.7 KiB
Python
# Copyright (C) 2003-2007 Robey Pointer <robeypointer@gmail.com>
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#
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# This file is part of paramiko.
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#
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# Paramiko is free software; you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation; either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# Paramiko is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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"""
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Common constants and global variables.
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"""
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import logging
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from paramiko.py3compat import byte_chr, PY2, bytes_types, text_type, long
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(
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MSG_DISCONNECT,
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MSG_IGNORE,
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MSG_UNIMPLEMENTED,
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MSG_DEBUG,
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MSG_SERVICE_REQUEST,
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MSG_SERVICE_ACCEPT,
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) = range(1, 7)
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(MSG_KEXINIT, MSG_NEWKEYS) = range(20, 22)
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(
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MSG_USERAUTH_REQUEST,
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MSG_USERAUTH_FAILURE,
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MSG_USERAUTH_SUCCESS,
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MSG_USERAUTH_BANNER,
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) = range(50, 54)
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MSG_USERAUTH_PK_OK = 60
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(MSG_USERAUTH_INFO_REQUEST, MSG_USERAUTH_INFO_RESPONSE) = range(60, 62)
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(MSG_USERAUTH_GSSAPI_RESPONSE, MSG_USERAUTH_GSSAPI_TOKEN) = range(60, 62)
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(
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MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE,
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MSG_USERAUTH_GSSAPI_ERROR,
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MSG_USERAUTH_GSSAPI_ERRTOK,
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MSG_USERAUTH_GSSAPI_MIC,
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) = range(63, 67)
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HIGHEST_USERAUTH_MESSAGE_ID = 79
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(MSG_GLOBAL_REQUEST, MSG_REQUEST_SUCCESS, MSG_REQUEST_FAILURE) = range(80, 83)
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(
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MSG_CHANNEL_OPEN,
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MSG_CHANNEL_OPEN_SUCCESS,
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MSG_CHANNEL_OPEN_FAILURE,
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MSG_CHANNEL_WINDOW_ADJUST,
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MSG_CHANNEL_DATA,
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MSG_CHANNEL_EXTENDED_DATA,
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MSG_CHANNEL_EOF,
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MSG_CHANNEL_CLOSE,
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MSG_CHANNEL_REQUEST,
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MSG_CHANNEL_SUCCESS,
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MSG_CHANNEL_FAILURE,
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) = range(90, 101)
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cMSG_DISCONNECT = byte_chr(MSG_DISCONNECT)
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cMSG_IGNORE = byte_chr(MSG_IGNORE)
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cMSG_UNIMPLEMENTED = byte_chr(MSG_UNIMPLEMENTED)
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cMSG_DEBUG = byte_chr(MSG_DEBUG)
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cMSG_SERVICE_REQUEST = byte_chr(MSG_SERVICE_REQUEST)
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cMSG_SERVICE_ACCEPT = byte_chr(MSG_SERVICE_ACCEPT)
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cMSG_KEXINIT = byte_chr(MSG_KEXINIT)
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cMSG_NEWKEYS = byte_chr(MSG_NEWKEYS)
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cMSG_USERAUTH_REQUEST = byte_chr(MSG_USERAUTH_REQUEST)
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cMSG_USERAUTH_FAILURE = byte_chr(MSG_USERAUTH_FAILURE)
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cMSG_USERAUTH_SUCCESS = byte_chr(MSG_USERAUTH_SUCCESS)
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cMSG_USERAUTH_BANNER = byte_chr(MSG_USERAUTH_BANNER)
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cMSG_USERAUTH_PK_OK = byte_chr(MSG_USERAUTH_PK_OK)
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cMSG_USERAUTH_INFO_REQUEST = byte_chr(MSG_USERAUTH_INFO_REQUEST)
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cMSG_USERAUTH_INFO_RESPONSE = byte_chr(MSG_USERAUTH_INFO_RESPONSE)
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cMSG_USERAUTH_GSSAPI_RESPONSE = byte_chr(MSG_USERAUTH_GSSAPI_RESPONSE)
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cMSG_USERAUTH_GSSAPI_TOKEN = byte_chr(MSG_USERAUTH_GSSAPI_TOKEN)
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cMSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE = byte_chr(
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MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE
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)
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cMSG_USERAUTH_GSSAPI_ERROR = byte_chr(MSG_USERAUTH_GSSAPI_ERROR)
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cMSG_USERAUTH_GSSAPI_ERRTOK = byte_chr(MSG_USERAUTH_GSSAPI_ERRTOK)
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cMSG_USERAUTH_GSSAPI_MIC = byte_chr(MSG_USERAUTH_GSSAPI_MIC)
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cMSG_GLOBAL_REQUEST = byte_chr(MSG_GLOBAL_REQUEST)
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cMSG_REQUEST_SUCCESS = byte_chr(MSG_REQUEST_SUCCESS)
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cMSG_REQUEST_FAILURE = byte_chr(MSG_REQUEST_FAILURE)
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cMSG_CHANNEL_OPEN = byte_chr(MSG_CHANNEL_OPEN)
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cMSG_CHANNEL_OPEN_SUCCESS = byte_chr(MSG_CHANNEL_OPEN_SUCCESS)
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cMSG_CHANNEL_OPEN_FAILURE = byte_chr(MSG_CHANNEL_OPEN_FAILURE)
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cMSG_CHANNEL_WINDOW_ADJUST = byte_chr(MSG_CHANNEL_WINDOW_ADJUST)
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cMSG_CHANNEL_DATA = byte_chr(MSG_CHANNEL_DATA)
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cMSG_CHANNEL_EXTENDED_DATA = byte_chr(MSG_CHANNEL_EXTENDED_DATA)
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cMSG_CHANNEL_EOF = byte_chr(MSG_CHANNEL_EOF)
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cMSG_CHANNEL_CLOSE = byte_chr(MSG_CHANNEL_CLOSE)
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cMSG_CHANNEL_REQUEST = byte_chr(MSG_CHANNEL_REQUEST)
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cMSG_CHANNEL_SUCCESS = byte_chr(MSG_CHANNEL_SUCCESS)
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cMSG_CHANNEL_FAILURE = byte_chr(MSG_CHANNEL_FAILURE)
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# for debugging:
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MSG_NAMES = {
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MSG_DISCONNECT: "disconnect",
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MSG_IGNORE: "ignore",
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MSG_UNIMPLEMENTED: "unimplemented",
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MSG_DEBUG: "debug",
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MSG_SERVICE_REQUEST: "service-request",
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MSG_SERVICE_ACCEPT: "service-accept",
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MSG_KEXINIT: "kexinit",
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MSG_NEWKEYS: "newkeys",
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30: "kex30",
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31: "kex31",
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32: "kex32",
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33: "kex33",
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34: "kex34",
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40: "kex40",
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41: "kex41",
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MSG_USERAUTH_REQUEST: "userauth-request",
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MSG_USERAUTH_FAILURE: "userauth-failure",
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MSG_USERAUTH_SUCCESS: "userauth-success",
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MSG_USERAUTH_BANNER: "userauth--banner",
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MSG_USERAUTH_PK_OK: "userauth-60(pk-ok/info-request)",
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MSG_USERAUTH_INFO_RESPONSE: "userauth-info-response",
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MSG_GLOBAL_REQUEST: "global-request",
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MSG_REQUEST_SUCCESS: "request-success",
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MSG_REQUEST_FAILURE: "request-failure",
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MSG_CHANNEL_OPEN: "channel-open",
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MSG_CHANNEL_OPEN_SUCCESS: "channel-open-success",
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MSG_CHANNEL_OPEN_FAILURE: "channel-open-failure",
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MSG_CHANNEL_WINDOW_ADJUST: "channel-window-adjust",
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MSG_CHANNEL_DATA: "channel-data",
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MSG_CHANNEL_EXTENDED_DATA: "channel-extended-data",
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MSG_CHANNEL_EOF: "channel-eof",
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MSG_CHANNEL_CLOSE: "channel-close",
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MSG_CHANNEL_REQUEST: "channel-request",
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MSG_CHANNEL_SUCCESS: "channel-success",
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MSG_CHANNEL_FAILURE: "channel-failure",
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MSG_USERAUTH_GSSAPI_RESPONSE: "userauth-gssapi-response",
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MSG_USERAUTH_GSSAPI_TOKEN: "userauth-gssapi-token",
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MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE: "userauth-gssapi-exchange-complete",
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MSG_USERAUTH_GSSAPI_ERROR: "userauth-gssapi-error",
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MSG_USERAUTH_GSSAPI_ERRTOK: "userauth-gssapi-error-token",
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MSG_USERAUTH_GSSAPI_MIC: "userauth-gssapi-mic",
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}
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# authentication request return codes:
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AUTH_SUCCESSFUL, AUTH_PARTIALLY_SUCCESSFUL, AUTH_FAILED = range(3)
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# channel request failed reasons:
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(
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OPEN_SUCCEEDED,
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OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED,
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OPEN_FAILED_CONNECT_FAILED,
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OPEN_FAILED_UNKNOWN_CHANNEL_TYPE,
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OPEN_FAILED_RESOURCE_SHORTAGE,
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) = range(0, 5)
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CONNECTION_FAILED_CODE = {
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1: "Administratively prohibited",
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2: "Connect failed",
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3: "Unknown channel type",
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4: "Resource shortage",
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}
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(
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DISCONNECT_SERVICE_NOT_AVAILABLE,
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DISCONNECT_AUTH_CANCELLED_BY_USER,
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DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE,
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) = (7, 13, 14)
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zero_byte = byte_chr(0)
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one_byte = byte_chr(1)
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four_byte = byte_chr(4)
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max_byte = byte_chr(0xff)
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cr_byte = byte_chr(13)
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linefeed_byte = byte_chr(10)
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crlf = cr_byte + linefeed_byte
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if PY2:
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cr_byte_value = cr_byte
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linefeed_byte_value = linefeed_byte
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else:
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cr_byte_value = 13
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linefeed_byte_value = 10
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def asbytes(s):
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"""Coerce to bytes if possible or return unchanged."""
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if isinstance(s, bytes_types):
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return s
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if isinstance(s, text_type):
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# Accept text and encode as utf-8 for compatibility only.
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return s.encode("utf-8")
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asbytes = getattr(s, "asbytes", None)
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if asbytes is not None:
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return asbytes()
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# May be an object that implements the buffer api, let callers handle.
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return s
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xffffffff = long(0xffffffff)
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x80000000 = long(0x80000000)
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o666 = 438
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o660 = 432
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o644 = 420
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o600 = 384
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o777 = 511
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o700 = 448
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o70 = 56
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DEBUG = logging.DEBUG
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INFO = logging.INFO
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WARNING = logging.WARNING
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ERROR = logging.ERROR
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CRITICAL = logging.CRITICAL
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# Common IO/select/etc sleep period, in seconds
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io_sleep = 0.01
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DEFAULT_WINDOW_SIZE = 64 * 2 ** 15
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DEFAULT_MAX_PACKET_SIZE = 2 ** 15
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# lower bound on the max packet size we'll accept from the remote host
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# Minimum packet size is 32768 bytes according to
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# http://www.ietf.org/rfc/rfc4254.txt
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MIN_WINDOW_SIZE = 2 ** 15
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# However, according to http://www.ietf.org/rfc/rfc4253.txt it is perfectly
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# legal to accept a size much smaller, as OpenSSH client does as size 16384.
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MIN_PACKET_SIZE = 2 ** 12
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# Max windows size according to http://www.ietf.org/rfc/rfc4254.txt
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MAX_WINDOW_SIZE = 2 ** 32 - 1
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