[SNMP4J] SNMP v3 - with same user name on different devices is not working

[Senthil Murugan Ramalingam -X (seramali - UNISH CORPORATION at Cisco)]

Usually engined id will be supplied by user through our GUI. But for
testing this issue, taken engine id from following two devices

ip :172.21.139.65
User name: sowra
Engine ID: 8000000903000019E765D390
storage-type: nonvolatile	 active
Authentication Protocol: SHA
Privacy Protocol: AES128


ip :172.21.139.105
User name: sowra

Engine ID: 8000000903000026984FEE81
storage-type: nonvolatile	 active
Authentication Protocol: MD5
Privacy Protocol: AES128

and adding user to USM using following method (run as threads),

snmp.getUSM().addLocalizedUser(engineID.getBytes(), new
OctetString(securityName), authenticationProtocol,
SecurityProtocols.getInstance().passwordToKey(authenticationProtocol,
authenticationPwd, engineID.getBytes()),privacyProtocol,
SecurityProtocols.getInstance().passwordToKey(privacyProtocol,
authenticationProtocol, privacyPwd, engineID.getBytes()));

But getting following exception


org.snmp4j.MessageException: Message processing model 3 returned error:
Unknown security name
	at 
org.snmp4j.MessageDispatcherImpl.sendPdu(MessageDispatcherImpl.java:501)
	at org.snmp4j.Snmp.sendMessage(Snmp.java:1004)
	at org.snmp4j.Snmp.send(Snmp.java:898)
	at org.snmp4j.Snmp.send(Snmp.java:878)
	at org.snmp4j.Snmp.send(Snmp.java:843)
	at 
com.cisco.sc.alc.service.SNMPv3Collector.doGet1(SNMPv3Collector.java:256)
	at com.cisco.sc.alc.service.TestThread.run(TestThread.java:36)

If I use following method, always one device get successful, other all
devices getting time out.

snmp.getUSM().addUser(new OctetString(securityName),new UsmUser(new
OctetString(securityName),authenticationProtocol,authenticationPwd,privacyP
rotocol,privacyPwd));





Can you pls share workable code for the scenario devices having same
security name that will be executed on threads at a time. Also is it
mandatory to get engineid if user name is same for all devices? If so why?

Thanks
-Senthil


On 4/18/15, 2:04 AM, "Frank Fock" <fock at agentpp.com> wrote:

>Hi Senthil,
>
>How do you get/determine the engine ID in your functions doGet1 parameter
>list?
>It must be different for those two devices and it has to be their
>authoritative engine ID.
>
>Best regards,
>Frank
>
>
>
>> On 17 Apr 2015, at 23:24, Senthil Murugan Ramalingam -X (seramali -
>>UNISH CORPORATION at Cisco) <seramali at cisco.com> wrote:
>> 
>> Hi Frank,
>> 
>> I am trying to do SNMP v3  get request to 2 different devices with same
>> user name , always 1 device get successful, other get time out. I
>>referred
>> earlier posts and tried all the solutions like localizing keys , nothing
>> works. Can you pls help me how to fix this.
>> 
>> Here my USM portion of code
>> 
>> 
>> private static USM usm;
>> 
>> 
>> 
>> static{
>> 		SecurityProtocols securityProtocols = SecurityProtocols.getInstance();
>> 	    securityProtocols.addPrivacyProtocol(new PrivAES128());
>> 	    securityProtocols.addPrivacyProtocol(new
>> PrivAES192With3DESKeyExtension());
>> 	    securityProtocols.addPrivacyProtocol(new
>> PrivAES256With3DESKeyExtension());
>> 	    securityProtocols.addPrivacyProtocol(new PrivDES());
>> 	    securityProtocols.addPrivacyProtocol(new Priv3DES());
>> 
>> 		 usm = new USM(securityProtocols, new
>> OctetString(MPv3.createLocalEngineID()), 0);
>> 		 SecurityModels.getInstance().addSecurityModel(usm);
>> 
>> }
>> 
>> 
>> public static String doGet1(String targetAddr,String securityName, OID
>> authenticationProtocol, String authenticationPassphrase,
>> 		  OID privacyProtocol, String privacyPassphrase, String engineID,
>>String
>> oid,Logger logger){
>> 	    
>> 
>> 	  try{
>> 	        usm.addUser(new OctetString(securityName),new UsmUser(new
>> OctetString(securityName),authenticationProtocol
>> 	        		,authenticationPwd,privacyProtocol,privacyPwd));
>> 	       
>> //	        usm.addLocalizedUser(engineid, new OctetString(securityName),
>> authenticationProtocol,
>> SecurityProtocols.getInstance().passwordToKey(authenticationProtocol,
>> authenticationPwd, engineid),
>> //	        		privacyProtocol,
>> SecurityProtocols.getInstance().passwordToKey(privacyProtocol,
>> authenticationProtocol, privacyPwd, engineid));
>> 
>> //	        usm.addLocalizedUser(engineid, new OctetString(securityName),
>> authenticationProtocol, authenticationPassphrase.getBytes(),
>> //	        		privacyProtocol, privacyPassphrase.getBytes());
>> 	        
>> 
>>  }
>> 
>> 
>> 
>> 
>> 
>> Thanks
>> -Senthil
>> 
>> 
>