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# Copyright (C) 2003-2007 Robey Pointer <[email protected]>## This file is part of paramiko.## Paramiko is free software; you can redistribute it and/or modify it under the# terms of the GNU Lesser General Public License as published by the Free# Software Foundation; either version 2.1 of the License, or (at your option)# any later version.## Paramiko is distributed in the hope that it will be useful, but WITHOUT ANY# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR# A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more# details.## You should have received a copy of the GNU Lesser General Public License# along with Paramiko; if not, write to the Free Software Foundation, Inc.,# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA."""Common constants and global variables."""import loggingfrom paramiko.py3compat import byte_chr, PY2, bytes_types, text_type, longMSG_DISCONNECT, MSG_IGNORE, MSG_UNIMPLEMENTED, MSG_DEBUG, \ MSG_SERVICE_REQUEST, MSG_SERVICE_ACCEPT = range(1, 7)MSG_KEXINIT, MSG_NEWKEYS = range(20, 22)MSG_USERAUTH_REQUEST, MSG_USERAUTH_FAILURE, MSG_USERAUTH_SUCCESS, \ MSG_USERAUTH_BANNER = range(50, 54)MSG_USERAUTH_PK_OK = 60MSG_USERAUTH_INFO_REQUEST, MSG_USERAUTH_INFO_RESPONSE = range(60, 62)MSG_USERAUTH_GSSAPI_RESPONSE, MSG_USERAUTH_GSSAPI_TOKEN = range(60, 62)MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE, MSG_USERAUTH_GSSAPI_ERROR,\ MSG_USERAUTH_GSSAPI_ERRTOK, MSG_USERAUTH_GSSAPI_MIC = range(63, 67)# BUG: CWE-287 Improper Authentication# # FIXED: HIGHEST_USERAUTH_MESSAGE_ID = 79MSG_GLOBAL_REQUEST, MSG_REQUEST_SUCCESS, MSG_REQUEST_FAILURE = range(80, 83)MSG_CHANNEL_OPEN, MSG_CHANNEL_OPEN_SUCCESS, MSG_CHANNEL_OPEN_FAILURE, \ MSG_CHANNEL_WINDOW_ADJUST, MSG_CHANNEL_DATA, MSG_CHANNEL_EXTENDED_DATA, \ MSG_CHANNEL_EOF, MSG_CHANNEL_CLOSE, MSG_CHANNEL_REQUEST, \ MSG_CHANNEL_SUCCESS, MSG_CHANNEL_FAILURE = range(90, 101)cMSG_DISCONNECT = byte_chr(MSG_DISCONNECT)cMSG_IGNORE = byte_chr(MSG_IGNORE)cMSG_UNIMPLEMENTED = byte_chr(MSG_UNIMPLEMENTED)cMSG_DEBUG = byte_chr(MSG_DEBUG)cMSG_SERVICE_REQUEST = byte_chr(MSG_SERVICE_REQUEST)cMSG_SERVICE_ACCEPT = byte_chr(MSG_SERVICE_ACCEPT)cMSG_KEXINIT = byte_chr(MSG_KEXINIT)cMSG_NEWKEYS = byte_chr(MSG_NEWKEYS)cMSG_USERAUTH_REQUEST = byte_chr(MSG_USERAUTH_REQUEST)cMSG_USERAUTH_FAILURE = byte_chr(MSG_USERAUTH_FAILURE)cMSG_USERAUTH_SUCCESS = byte_chr(MSG_USERAUTH_SUCCESS)cMSG_USERAUTH_BANNER = byte_chr(MSG_USERAUTH_BANNER)cMSG_USERAUTH_PK_OK = byte_chr(MSG_USERAUTH_PK_OK)cMSG_USERAUTH_INFO_REQUEST = byte_chr(MSG_USERAUTH_INFO_REQUEST)cMSG_USERAUTH_INFO_RESPONSE = byte_chr(MSG_USERAUTH_INFO_RESPONSE)cMSG_USERAUTH_GSSAPI_RESPONSE = byte_chr(MSG_USERAUTH_GSSAPI_RESPONSE)cMSG_USERAUTH_GSSAPI_TOKEN = byte_chr(MSG_USERAUTH_GSSAPI_TOKEN)cMSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE = \ byte_chr(MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE)cMSG_USERAUTH_GSSAPI_ERROR = byte_chr(MSG_USERAUTH_GSSAPI_ERROR)cMSG_USERAUTH_GSSAPI_ERRTOK = byte_chr(MSG_USERAUTH_GSSAPI_ERRTOK)cMSG_USERAUTH_GSSAPI_MIC = byte_chr(MSG_USERAUTH_GSSAPI_MIC)cMSG_GLOBAL_REQUEST = byte_chr(MSG_GLOBAL_REQUEST)cMSG_REQUEST_SUCCESS = byte_chr(MSG_REQUEST_SUCCESS)cMSG_REQUEST_FAILURE = byte_chr(MSG_REQUEST_FAILURE)cMSG_CHANNEL_OPEN = byte_chr(MSG_CHANNEL_OPEN)cMSG_CHANNEL_OPEN_SUCCESS = byte_chr(MSG_CHANNEL_OPEN_SUCCESS)cMSG_CHANNEL_OPEN_FAILURE = byte_chr(MSG_CHANNEL_OPEN_FAILURE)cMSG_CHANNEL_WINDOW_ADJUST = byte_chr(MSG_CHANNEL_WINDOW_ADJUST)cMSG_CHANNEL_DATA = byte_chr(MSG_CHANNEL_DATA)cMSG_CHANNEL_EXTENDED_DATA = byte_chr(MSG_CHANNEL_EXTENDED_DATA)cMSG_CHANNEL_EOF = byte_chr(MSG_CHANNEL_EOF)cMSG_CHANNEL_CLOSE = byte_chr(MSG_CHANNEL_CLOSE)cMSG_CHANNEL_REQUEST = byte_chr(MSG_CHANNEL_REQUEST)cMSG_CHANNEL_SUCCESS = byte_chr(MSG_CHANNEL_SUCCESS)cMSG_CHANNEL_FAILURE = byte_chr(MSG_CHANNEL_FAILURE)# for debugging:MSG_NAMES = { MSG_DISCONNECT: 'disconnect', MSG_IGNORE: 'ignore', MSG_UNIMPLEMENTED: 'unimplemented', MSG_DEBUG: 'debug', MSG_SERVICE_REQUEST: 'service-request', MSG_SERVICE_ACCEPT: 'service-accept', MSG_KEXINIT: 'kexinit', MSG_NEWKEYS: 'newkeys', 30: 'kex30', 31: 'kex31', 32: 'kex32', 33: 'kex33', 34: 'kex34', 40: 'kex40', 41: 'kex41', MSG_USERAUTH_REQUEST: 'userauth-request', MSG_USERAUTH_FAILURE: 'userauth-failure', MSG_USERAUTH_SUCCESS: 'userauth-success', MSG_USERAUTH_BANNER: 'userauth--banner', MSG_USERAUTH_PK_OK: 'userauth-60(pk-ok/info-request)', MSG_USERAUTH_INFO_RESPONSE: 'userauth-info-response', MSG_GLOBAL_REQUEST: 'global-request', MSG_REQUEST_SUCCESS: 'request-success', MSG_REQUEST_FAILURE: 'request-failure', MSG_CHANNEL_OPEN: 'channel-open', MSG_CHANNEL_OPEN_SUCCESS: 'channel-open-success', MSG_CHANNEL_OPEN_FAILURE: 'channel-open-failure', MSG_CHANNEL_WINDOW_ADJUST: 'channel-window-adjust', MSG_CHANNEL_DATA: 'channel-data', MSG_CHANNEL_EXTENDED_DATA: 'channel-extended-data', MSG_CHANNEL_EOF: 'channel-eof', MSG_CHANNEL_CLOSE: 'channel-close', MSG_CHANNEL_REQUEST: 'channel-request', MSG_CHANNEL_SUCCESS: 'channel-success', MSG_CHANNEL_FAILURE: 'channel-failure', MSG_USERAUTH_GSSAPI_RESPONSE: 'userauth-gssapi-response', MSG_USERAUTH_GSSAPI_TOKEN: 'userauth-gssapi-token', MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE: 'userauth-gssapi-exchange-complete', MSG_USERAUTH_GSSAPI_ERROR: 'userauth-gssapi-error', MSG_USERAUTH_GSSAPI_ERRTOK: 'userauth-gssapi-error-token', MSG_USERAUTH_GSSAPI_MIC: 'userauth-gssapi-mic'}# authentication request return codes:AUTH_SUCCESSFUL, AUTH_PARTIALLY_SUCCESSFUL, AUTH_FAILED = range(3)# channel request failed reasons:(OPEN_SUCCEEDED, OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED, OPEN_FAILED_CONNECT_FAILED, OPEN_FAILED_UNKNOWN_CHANNEL_TYPE, OPEN_FAILED_RESOURCE_SHORTAGE) = range(0, 5)CONNECTION_FAILED_CODE = { 1: 'Administratively prohibited', 2: 'Connect failed', 3: 'Unknown channel type', 4: 'Resource shortage'}DISCONNECT_SERVICE_NOT_AVAILABLE, DISCONNECT_AUTH_CANCELLED_BY_USER, \ DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE = 7, 13, 14zero_byte = byte_chr(0)one_byte = byte_chr(1)four_byte = byte_chr(4)max_byte = byte_chr(0xff)cr_byte = byte_chr(13)linefeed_byte = byte_chr(10)crlf = cr_byte + linefeed_byteif PY2: cr_byte_value = cr_byte linefeed_byte_value = linefeed_byteelse: cr_byte_value = 13 linefeed_byte_value = 10def asbytes(s): """Coerce to bytes if possible or return unchanged.""" if isinstance(s, bytes_types): return s if isinstance(s, text_type): # Accept text and encode as utf-8 for compatibility only. return s.encode("utf-8") asbytes = getattr(s, "asbytes", None) if asbytes is not None: return asbytes() # May be an object that implements the buffer api, let callers handle. return sxffffffff = long(0xffffffff)x80000000 = long(0x80000000)o666 = 438o660 = 432o644 = 420o600 = 384o777 = 511o700 = 448o70 = 56DEBUG = logging.DEBUGINFO = logging.INFOWARNING = logging.WARNINGERROR = logging.ERRORCRITICAL = logging.CRITICAL# Common IO/select/etc sleep period, in secondsio_sleep = 0.01DEFAULT_WINDOW_SIZE = 64 * 2 ** 15DEFAULT_MAX_PACKET_SIZE = 2 ** 15# lower bound on the max packet size we'll accept from the remote host# Minimum packet size is 32768 bytes according to# http://www.ietf.org/rfc/rfc4254.txtMIN_WINDOW_SIZE = 2 ** 15# However, according to http://www.ietf.org/rfc/rfc4253.txt it is perfectly# legal to accept a size much smaller, as OpenSSH client does as size 16384.MIN_PACKET_SIZE = 2 ** 12# Max windows size according to http://www.ietf.org/rfc/rfc4254.txtMAX_WINDOW_SIZE = 2 ** 32 - 1 |