[SNMP4J] snmp4j 2.2.5 3DES, AES192/256 not working

[Frank Fock]

Hi,

For encryption algorithms using more than 128bit keys (3DES, AES192, and 
AES256)
you need to activate strong encryption in the Java Runtime. Please see 
Oracle's
documentation on how to do this.

See also the SNMP FAQ at:
https://oosnmp.net/confluence/pages/viewpage.action?pageId=6651906

Best regards,
Frank

Am 11.05.2014 07:12, schrieb NarayanaRao Yenduri:
>
>
> On Sunday, May 11, 2014 10:32 AM, NarayanaRao Yenduri <ynr_ind at yahoo.com> wrote:
>   
> Hi Team,
> i am very new to using snmp4j.
> i am using the sample code to get use to this.
> https://github.com/mchopker/myprojects/blob/master/TranSenderReceiver/src/SNMPTrapGeneratorClient.java
>
>
> Following is the method which is working fine for DES and AES128. it is not working for other protocols.
>
> /**
>   * Sends the v3 trap
>   */
> private static void sendSnmpV3AuthTrap() {
> try {
> long start = System.currentTimeMillis();
> Address targetAddress = GenericAddress.parse("udp:" + ipAddress
> + "/" + port);
>
> // Create Transport Mapping
> TransportMapping<?> transport = new DefaultUdpTransportMapping();
> Snmp snmp = new Snmp(transport);
> USM usm = new USM(SecurityProtocols.getInstance(), new OctetString(
> MPv3.createLocalEngineID()), 0);
> USM usm1 = new USM(SecurityProtocols.getInstance(), new OctetString(
> MPv3.createLocalEngineID(new OctetString("80001f88806a05a51f521dfd87"))), 0);
> SecurityModels.getInstance().addSecurityModel(usm1);
> transport.listen();
> snmp.getUSM().addUser(
> new OctetString("MD5DES"),
> new UsmUser(new OctetString("MD5DES"), AuthMD5.ID,
> new OctetString("UserName"), PrivAES128.ID,
> new OctetString("UserName")));
>
> // Create Target
> UserTarget target = new UserTarget();
> target.setAddress(targetAddress);
> target.setRetries(1);
>
> // set timeout
> target.setTimeout(11500);
> target.setVersion(SnmpConstants.version3);
> target.setSecurityLevel(SecurityLevel.AUTH_PRIV);
> target.setSecurityName(new OctetString("MD5DES"));
>
> // Create PDU for V3
> ScopedPDU pdu = new ScopedPDU();
> pdu.setType(ScopedPDU.NOTIFICATION);
>
> // need to specify the system up time
> long sysUpTime = (System.currentTimeMillis() - start) / 10;
> pdu.add(new VariableBinding(SnmpConstants.sysUpTime, new TimeTicks(
> sysUpTime)));
>
> // Send the PDU
> System.out.println("Sending V3 priv Trap to " + ipAddress + " on Port "
> + port+" time is "+new Date());
> snmp.send(pdu, target);
> /*snmp.addCommandResponder(new CommandResponder() {
> @Override
> public void processPdu(CommandResponderEvent arg0) {
> System.out.println(arg0);
> }
> });*/
> snmp.close();
> } catch (Exception e) {
> System.err.println("Error in Sending V3 Trap to " + ipAddress
> + " on Port " + port);
> System.err.println("Exception Message = " + e.getMessage());
> }
> }
>
> i am getting below exception with other modes.
> "Exception Message = Message processing model 3 returned error: Encryption error"
> org.snmp4j.MessageException: Message processing model 3 returned error: Encryption error
> at org.snmp4j.MessageDispatcherImpl.sendPdu(MessageDispatcherImpl.java:501)
> at org.snmp4j.Snmp.sendMessage(Snmp.java:1004)
> at org.snmp4j.Snmp.send(Snmp.java:885)
> at org.snmp4j.Snmp.send(Snmp.java:878)
> at org.snmp4j.Snmp.send(Snmp.java:843)
> at com.cisco.xbow.hpm.snmp.traps.SNMPTrapGeneratorClient.sendSnmpV3AuthTrap(SNMPTrapGeneratorClient.java:274)
>
>
> Could you please help me to resolve this.
> Thanks in advance,
> Narayanarao
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