[SNMP4J] SNMPv3 with encryption doesn't work

[InternetX - Christian Bleicher]

Hello list,

 

i have the following problem. If I use snmpv3 without encryption all works
fine. Also if I use the get command with encryption it works fine.

But if I try to set a snmp variable to something else, there is no result.
Here's my source:

 

public String setV3(OID oid,Variable variable) throws IOException,
NoResponseException {

                        TransportMapping transport = new
DefaultUdpTransportMapping();

                        Snmp snmp = new Snmp(transport);

                        

                        USM usm = new USM(

                                   SecurityProtocols.getInstance(),

                                   new
OctetString(MPv3.createLocalEngineID()), 

                                   0

                        );

                        

                        SecurityModels.getInstance().addSecurityModel(usm);

        

        snmp.getUSM().addUser(new OctetString(snmpV3User),

                         new UsmUser(new OctetString(snmpV3User),

                                     AuthMD5.ID,

                                     new OctetString(snmpAuthPassphrase),

                                     PrivDES.ID,

                                     new OctetString(snmpPrivPassphrase)));

                        

                        transport.listen();

                        

                        CommandResponder trapPrinter = new
CommandResponder() {

                                   public synchronized void
processPdu(CommandResponderEvent e) {

                                               PDU command = e.getPDU();

                                               if (command != null) {

                                               }

                                   }

                        };

                        snmp.addCommandResponder(trapPrinter);

                        

                        // setting up target

                        target.setRetries(retries);

                        target.setTimeout(timeout);

                        target.setVersion(version);

 
((UserTarget)target).setSecurityLevel(SecurityLevel.AUTH_PRIV);

        ((UserTarget)target).setSecurityName(new
OctetString(getSnmpV3User()));

                        

        

                        //Create var Binding

                        VariableBinding vb = new VariableBinding(oid);

                        vb.setVariable(variable);

                        

                        // creating PDU

                        PDU pdu = new ScopedPDU();

                        pdu.add(vb);

                        pdu.setType(PDU.SET);

                        

        System.out.println(pdu);

                        

                        ResponseEvent response = snmp.set(pdu,target);

        

        System.out.println(response.getUserObject());

        if(response == null){

            throw new NoResponseException();

        }

                        return response.getRequest().toString();

            }

 

NOTE: If I don't use encryption I set the SecurityLevel to NOAUTH_NOPRIV

 

I have checked the encryption pass phrases and searched for a possibility to
solve the problem. But I couldn't find anything. I hope you can help me.

 

With friendly regards

Christian