Re: [pysnmp-users] unknownEngineID error
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Re: [pysnmp-users] unknownEngineID error
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From: Paulo F. A. <pf...@me...> - 2007-05-17 12:41:55
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Hi,
I haven't tried the CVS version yet.
I'm using pysnmp 4.1.7a-1 from debian unstable.
Here is the script I'm using to test this:
------------------------- script ---------------------------
#!/usr/bin/python
from pysnmp.entity import engine
from pysnmp.entity.rfc3413.oneliner import cmdgen
from pysnmp import debug
debug.setLogger(debug.Debug('secmod'))
usmData =3D cmdgen.UsmUserData('user', 'XXXX', =20
'XXXX',cmdgen.usmHMACSHAAuthProtocol, cmdgen.usmDESPrivProtocol)
udpTransport =3D cmdgen.UdpTransportTarget(('192.168.249.1',161))
errorIndication, errorStatus, errorIndex, varBindTable =3D =20
cmdgen.CommandGenerator().nextCmd(
usmData,
udpTransport,
(1,3,6,1,2,1,1)
)
print errorStatus
print errorIndication
=09
for varBindTableRow in varBindTable:
print varBindTableRow
------------------------- /script ---------------------------
Here are the results I got:
----------------- running teste.py ---------------------
$ ./teste.py
DBG: debug category secmod enabled
DBG: __generateRequestOrResponseMsg: use empty USM data
DBG: __generateRequestOrResponseMsg: local user usmUserName =20
usmUserAuthProtocol None usmUserPrivProtocol None by =20
securityEngineID securityName
DBG: __generateRequestOrResponseMsg: assuming zero snmpEngineBoots, =20
snmpEngineTime
DBG: __generateRequestOrResponseMsg: use snmpEngineBoots 0 =20
snmpEngineTime 0 for securityEngineID
DBG: __generateRequestOrResponseMsg: UsmSecurityParameters:
msgAuthoritativeEngineID=3D''
msgAuthoritativeEngineBoots=3D0
msgAuthoritativeEngineTime=3D0
msgUserName=3D''
msgAuthenticationParameters=3D''
msgPrivacyParameters=3D''
DBG: __generateRequestOrResponseMsg: plain outgoing msg
DBG: processIncomingMsg: UsmSecurityParameters:
msgAuthoritativeEngineID=3D'\x80\x00\x02}\x03\x00\xd0\x95\xd8A\xc5'
msgAuthoritativeEngineBoots=3D0
msgAuthoritativeEngineTime=3D0
msgUserName=3D''
msgAuthenticationParameters=3D''
msgPrivacyParameters=3D''
DBG: processIncomingMsg: cache read securityStateReference 0 by =20
msgUserName
DBG: processIncomingMsg: unknown securityEngineID ?}=D0=95?A?
DBG: processIncomingMsg: store timeline for securityEngineID ?}=D0=95?A?
DBG: processIncomingMsg: read from securityParams =20
msgAuthoritativeEngineID ?}=D0=95?A? msgUserName
DBG: processIncomingMsg: now have usmUserSecurityName =20
usmUserAuthProtocol None usmUserPrivProtocol None for msgUserName
DBG: processIncomingMsg: cached msgUserName info by =20
securityStateReference 1
DBG: StatusInformation: {'oid': ObjectName('1.3.6.1.6.3.15.1.1.4.0'), =20=
'sendPduHandle': 1L, 'val': Counter32('20486663'), 'errorIndication': =20=
'unknownEngineID'}
DBG: __generateRequestOrResponseMsg: use empty USM data
DBG: __generateRequestOrResponseMsg: local user usmUserName =20
usmUserAuthProtocol None usmUserPrivProtocol None by =20
securityEngineID securityName
DBG: __generateRequestOrResponseMsg: assuming zero snmpEngineBoots, =20
snmpEngineTime
DBG: __generateRequestOrResponseMsg: use snmpEngineBoots 0 =20
snmpEngineTime 0 for securityEngineID
DBG: __generateRequestOrResponseMsg: UsmSecurityParameters:
msgAuthoritativeEngineID=3D''
msgAuthoritativeEngineBoots=3D0
msgAuthoritativeEngineTime=3D0
msgUserName=3D''
msgAuthenticationParameters=3D''
msgPrivacyParameters=3D''
DBG: __generateRequestOrResponseMsg: plain outgoing msg
DBG: processIncomingMsg: UsmSecurityParameters:
msgAuthoritativeEngineID=3D'\x80\x00\x02}\x03\x00\xd0\x95\xd8A\xc5'
msgAuthoritativeEngineBoots=3D0
msgAuthoritativeEngineTime=3D0
msgUserName=3D''
msgAuthenticationParameters=3D''
msgPrivacyParameters=3D''
DBG: processIncomingMsg: cache read securityStateReference 2 by =20
msgUserName
DBG: processIncomingMsg: read from securityParams =20
msgAuthoritativeEngineID ?}=D0=95?A? msgUserName
DBG: processIncomingMsg: now have usmUserSecurityName =20
usmUserAuthProtocol None usmUserPrivProtocol None for msgUserName
DBG: processIncomingMsg: cached msgUserName info by =20
securityStateReference 3
DBG: StatusInformation: {'oid': ObjectName('1.3.6.1.6.3.15.1.1.4.0'), =20=
'sendPduHandle': 2L, 'val': Counter32('20486664'), 'errorIndication': =20=
'unknownEngineID'}
DBG: __generateRequestOrResponseMsg: use empty USM data
DBG: __generateRequestOrResponseMsg: local user usmUserName =20
usmUserAuthProtocol None usmUserPrivProtocol None by =20
securityEngineID securityName
DBG: __generateRequestOrResponseMsg: assuming zero snmpEngineBoots, =20
snmpEngineTime
DBG: __generateRequestOrResponseMsg: use snmpEngineBoots 0 =20
snmpEngineTime 0 for securityEngineID
DBG: __generateRequestOrResponseMsg: UsmSecurityParameters:
msgAuthoritativeEngineID=3D''
msgAuthoritativeEngineBoots=3D0
msgAuthoritativeEngineTime=3D0
msgUserName=3D''
msgAuthenticationParameters=3D''
msgPrivacyParameters=3D''
DBG: __generateRequestOrResponseMsg: plain outgoing msg
DBG: processIncomingMsg: UsmSecurityParameters:
msgAuthoritativeEngineID=3D'\x80\x00\x02}\x03\x00\xd0\x95\xd8A\xc5'
msgAuthoritativeEngineBoots=3D0
msgAuthoritativeEngineTime=3D0
msgUserName=3D''
msgAuthenticationParameters=3D''
msgPrivacyParameters=3D''
DBG: processIncomingMsg: cache read securityStateReference 4 by =20
msgUserName
DBG: processIncomingMsg: read from securityParams =20
msgAuthoritativeEngineID ?}=D0=95?A? msgUserName
DBG: processIncomingMsg: now have usmUserSecurityName =20
usmUserAuthProtocol None usmUserPrivProtocol None for msgUserName
DBG: processIncomingMsg: cached msgUserName info by =20
securityStateReference 5
DBG: StatusInformation: {'oid': ObjectName('1.3.6.1.6.3.15.1.1.4.0'), =20=
'sendPduHandle': 3L, 'val': Counter32('20486665'), 'errorIndication': =20=
'unknownEngineID'}
0
unknownEngineID
----------------- /running teste.py ---------------------
----------------- running pysnmpwalk ---------------------
$ pysnmpwalk -v3 -l authPriv -u user -x DES -a SHA -A XXXX -X XXXX =20
192.168.249.1 1.3.6.1.2.1.1
unknownEngineID
----------------- /running pysnmpwalk ---------------------
Issuing the exact same command replacing "pysnmpwalk" with "snmpwalk" =20=
works fine.
Paulo F. Andrade 52439@IST
mailto: pf...@me...
On 2007/05/16, at 10:58, Ilya Etingof wrote:
>
> That error might mean that your SNMP engine fails to discover peer =20
> SNMP
> engine for some reason. In attempt to figure out the cause I'd =20
> suggest enabling SNMP security module debugging by adding the =20
> following in the beginning of your script:
>
> from pysnmp import debug
> debug.setLogger(debug.Debug('secmod'))
>
> That would enable stderr reporting. I'd appreciate you sending me =20
> the output for a single failed GETNEXT session.
>
> Also, try using pysnmp code from CVS -- there were some minor =20
> fixes, though I'm not sure how relevant they are to this problem.
>
> BTW, does pysnmpwalk tool (from pysnmp-apps package) fails in the =20
> same way?
>
> -ilya
>
>> I'm using pysnmp v4 to interact with a network device using SNMPv3.
>> I can successfully make queries using the snmp command. However
>> following the examples available in the Documentation I get the
>> following error: unknownEngineID
>>
>> Here is the relevant code:
>>
>> errorIndication, errorStatus, errorIndex, varBindTable =3D
>> cmdgen.CommandGenerator().nextCmd(
>> cmdgen.UsmUserData('user', 'xxxx',
>> 'xxxx',cmdgen.usmHMACSHAAuthProtocol, cmdgen.usmDESPrivProtocol),
>> cmdgen.UdpTransportTarget(('192.168.2.1',161)),
>> (1,3,6,1,2,1,1)
>> )
>>
>> print errorStatus
>> print errorIndication
>>
>> for varBindTableRow in varBindTable:
>> print varBindTableRow
>>
>> And the output is:
>> 0
>> unknownEngineID
>>
>> If I do the same query using the snmpwalk command it behaves as
>> expected.
>> (snmpwalk -v3 -l authPriv -u user -x DES -a SHA -A xxxx -X xxxx
>> 192.168.2.1 1.3.6.1.2.1.1)
>>
>> So.. anybody can explain me what that error is?
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