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from pysnmp.entity import config
from pysnmp import error
from pyasn1.compat.octets import null
class CommunityData:
"""Creates SNMP v1/v2c configuration entry.
This object can be used by
:py:class:`~pysnmp.entity.rfc3413.oneliner.cmdgen.AsyncCommandGenerator` or
:py:class:`~pysnmp.entity.rfc3413.oneliner.ntforg.AsyncNotificationOriginator`
and their derivatives for adding new entries to Local Configuration
Datastore (LCD) managed by :py:class:`~pysnmp.entity.engine.SnmpEngine`
class instance.
See :RFC:`2576#section-5.3` for more information on the
*SNMP-COMMUNITY-MIB::snmpCommunityTable*.
Parameters
----------
communityIndex : str
Unique index value of a row in snmpCommunityTable. If it is the
only positional parameter, it is taken as *communityName*.
communityName : str
SNMP v1/v2c community string.
mpModel : int
SNMP version - 0 for SNMPv1 and 1 for SNMPv2c.
contextEngineId : str
Indicates the location of the context in which management
information is accessed when using the community string
specified by the above communityName.
contextName : str
The context in which management information is accessed when
using the above communityName.
tag : str
Arbitrary string that specifies a set of transport endpoints
to which a notification may be sent using communityName above
(see also :RFC:`3413#section-4.1.4`).
Examples
--------
>>> from pysnmp.entity.rfc3413.oneliner.auth import CommunityData
>>> CommunityData('public')
CommunityData(communityIndex='s1410706889', communityName=<COMMUNITY>, mpModel=1, contextEngineId=None, contextName='', tag='')
>>> CommunityData('public', 'public')
CommunityData(communityIndex='public', communityName=<COMMUNITY>, mpModel=1, contextEngineId=None, contextName='', tag='')
>>>
"""
mpModel = 1 # Default is SMIv2
securityModel = mpModel + 1
securityLevel = 'noAuthNoPriv'
contextName = null
tag = null
def __init__(self, communityIndex, communityName=None, mpModel=None,
contextEngineId=None, contextName=None, tag=None,
securityName=None):
if mpModel is not None:
self.mpModel = mpModel
self.securityModel = mpModel + 1
self.contextEngineId = contextEngineId
if contextName is not None:
self.contextName = contextName
if tag is not None:
self.tag = tag
# a single arg is considered as a community name
if communityName is None:
communityName, communityIndex = communityIndex, None
self.communityName = communityName
# Autogenerate communityIndex if not specified
if communityIndex is None:
self.communityIndex = self.securityName = 's%s' % hash(
( self.communityName,
self.mpModel,
self.contextEngineId,
self.contextName,
self.tag )
)
else:
self.communityIndex = communityIndex
self.securityName = securityName is not None and securityName or communityIndex
def __hash__(self):
raise TypeError('%s is not hashable' % self.__class__.__name__)
def __repr__(self):
return '%s(communityIndex=%r, communityName=<COMMUNITY>, mpModel=%r, contextEngineId=%r, contextName=%r, tag=%r, securityName=%r)' % (
self.__class__.__name__,
self.communityIndex,
self.mpModel,
self.contextEngineId,
self.contextName,
self.tag,
self.securityName
)
def clone(self, communityIndex=None, communityName=None,
mpModel=None, contextEngineId=None,
contextName=None, tag=None, securityName=None):
# a single arg is considered as a community name
if communityName is None:
communityName, communityIndex = communityIndex, None
return self.__class__(
communityIndex,
communityName is None and self.communityName or communityName,
mpModel is None and self.mpModel or mpModel,
contextEngineId is None and self.contextEngineId or contextEngineId,
contextName is None and self.contextName or contextName,
tag is None and self.tag or tag,
securityName is None and self.securityName or securityName
)
#: No Authentication Protocol.
usmNoAuthProtocol = config.usmNoAuthProtocol
#: The HMAC-MD5-96 Digest Authentication Protocol (:RFC:`3414#section-6`)
usmHMACMD5AuthProtocol = config.usmHMACMD5AuthProtocol
#: The HMAC-SHA-96 Digest Authentication Protocol (:RFC:`3414#section-7`)
usmHMACSHAAuthProtocol = config.usmHMACSHAAuthProtocol
#: No Privacy Protocol.
usmNoPrivProtocol = config.usmNoPrivProtocol
#: The CBC-DES Symmetric Encryption Protocol (:RFC:`3414#section-8`)
usmDESPrivProtocol = config.usmDESPrivProtocol
#: The 3DES-EDE Symmetric Encryption Protocol (`draft-reeder-snmpv3-usm-3desede-00 <https://tools.ietf.org/html/draft-reeder-snmpv3-usm-3desede-00#section-5>`_)
usm3DESEDEPrivProtocol = config.usm3DESEDEPrivProtocol
#: The CFB128-AES-128 Symmetric Encryption Protocol (:RFC:`3826#section-3`)
usmAesCfb128Protocol = config.usmAesCfb128Protocol
#: The CFB128-AES-192 Symmetric Encryption Protocol (`draft-blumenthal-aes-usm-04 <https://tools.ietf.org/html/draft-blumenthal-aes-usm-04#section-3>`_)
usmAesCfb192Protocol = config.usmAesCfb192Protocol
#: The CFB128-AES-256 Symmetric Encryption Protocol (`draft-blumenthal-aes-usm-04 <https://tools.ietf.org/html/draft-blumenthal-aes-usm-04#section-3>`_)
usmAesCfb256Protocol = config.usmAesCfb256Protocol
class UsmUserData:
"""Creates SNMP v3 User Security Model (USM) configuration entry.
This object can be used by
:py:class:`~pysnmp.entity.rfc3413.oneliner.cmdgen.AsyncCommandGenerator` or
:py:class:`~pysnmp.entity.rfc3413.oneliner.ntforg.AsyncNotificationOriginator`
and their derivatives for adding new entries to Local Configuration
Datastore (LCD) managed by :py:class:`~pysnmp.entity.engine.SnmpEngine`
class instance.
See :RFC:`3414#section-5` for more information on the
*SNMP-USER-BASED-SM-MIB::usmUserTable*.
Parameters
----------
userName : str
A human readable string representing the name of the SNMP USM user.
authKey : str
Initial value of the secret authentication key. If not set,
:py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmNoAuthProtocol`
is implied. If set and no *authProtocol* is specified,
:py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmHMACMD5AuthProtocol`
takes effect.
privKey : str
Initial value of the secret encryption key. If not set,
:py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmNoPrivProtocol`
is implied. If set and no *privProtocol* is specified,
:py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmDESPrivProtocol`
takes effect.
authProtocol : tuple
An indication of whether messages sent on behalf of this USM user
can be authenticated, and if so, the type of authentication protocol
which is used.
Supported authentication protocol identifiers are:
* :py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmNoAuthProtocol` (default is *authKey* not given)
* :py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmHMACMD5AuthProtocol` (default if *authKey* is given)
* :py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmHMACSHAAuthProtocol`
privProtocol : tuple
An indication of whether messages sent on behalf of this USM user
be encrypted, and if so, the type of encryption protocol which is used.
Supported encryption protocol identifiers are:
* :py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmNoPrivProtocol` (default is *authKey* not given)
* :py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmDESPrivProtocol` (default if *authKey* is given)
* :py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usm3DESEDEPrivProtocol`
* :py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmAesCfb128Protocol`
* :py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmAesCfb192Protocol`
* :py:class:`~pysnmp.entity.rfc3413.oneliner.auth.usmAesCfb256Protocol`
Examples
--------
>>> from pysnmp.entity.rfc3413.oneliner.auth import UsmUserData
>>> UsmUserData('testuser', authKey='authenticationkey')
UsmUserData(userName='testuser', authKey=<AUTHKEY>, privKey=<PRIVKEY>, authProtocol=(1,3,6,1,6,3,10,1,1,2), privProtocol=(1,3,6,1,6,3,10,1,2,1))
>>> UsmUserData('testuser', authKey='authenticationkey', privKey='encryptionkey')
UsmUserData(userName='testuser', authKey=<AUTHKEY>, privKey=<PRIVKEY>, authProtocol=(1,3,6,1,6,3,10,1,1,2), privProtocol=(1,3,6,1,6,3,10,1,2,2))
>>>
"""
authKey = privKey = None
authProtocol = config.usmNoAuthProtocol
privProtocol = config.usmNoPrivProtocol
securityLevel = 'noAuthNoPriv'
securityModel = 3
mpModel = 3
contextName = null
# the contextEngineId/contextName values stored here should
# be used for USM configuration only, not for PDU contents
def __init__(self, userName,
authKey=None, privKey=None,
authProtocol=None, privProtocol=None,
securityEngineId=None,
# deprecated parameters begin
contextName=None,
contextEngineId=None,
# deprecated parameters end
securityName=None):
self.userName = userName
if securityName is None:
self.securityName = userName
else:
self.securityName = securityName
if authKey is not None:
self.authKey = authKey
if authProtocol is None:
self.authProtocol = config.usmHMACMD5AuthProtocol
else:
self.authProtocol = authProtocol
if self.securityLevel != 'authPriv':
self.securityLevel = 'authNoPriv'
if privKey is not None:
self.privKey = privKey
if self.authProtocol == config.usmNoAuthProtocol:
raise error.PySnmpError('Privacy implies authenticity')
self.securityLevel = 'authPriv'
if privProtocol is None:
self.privProtocol = config.usmDESPrivProtocol
else:
self.privProtocol = privProtocol
# the contextEngineId parameter is actually a securityEngineId
if securityEngineId is None:
securityEngineId = contextEngineId
self.contextEngineId = self.securityEngineId = securityEngineId
# the contextName parameter should never be used here
if contextName is not None:
self.contextName = contextName
def __hash__(self):
raise TypeError('%s is not hashable' % self.__class__.__name__)
def __repr__(self):
return '%s(userName=%r, authKey=<AUTHKEY>, privKey=<PRIVKEY>, authProtocol=%r, privProtocol=%r, securityEngineId=%r, securityName=%r)'%(
self.__class__.__name__,
self.userName,
self.authProtocol,
self.privProtocol,
self.securityEngineId is None and '<DEFAULT>' or self.securityEngineId,
self.securityName
)
def clone(self, userName=None,
authKey=None, privKey=None,
authProtocol=None, privProtocol=None,
securityEngineId=None, securityName=None):
return self.__class__(
userName is None and self.userName or userName,
authKey is None and self.authKey or authKey,
privKey is None and self.privKey or privKey,
authProtocol is None and self.authProtocol or authProtocol,
privProtocol is None and self.privProtocol or privProtocol,
securityEngineId is None and self.securityEngineId or securityEngineId,
securityName=securityName is None and self.securityName or securityName
)
|
