[SNMP4J] SNMP v3 USM issue

[~Kanagavelu~]

Hi,

I believe USM table model will keep lastly updated password for the same
user and it is not possible to have one user with two different passwords
<Always one USER one PWD(recently updated)>.

Regards,
Velu.



On Mon, Sep 19, 2011 at 4:03 PM, Robert Pierce <rpierce at actionpacked.com>wrote:

> Hi,
> I'm encountering an issue with V3 and the USM. I'm trying to request
> information from two different devices via snmpv3 but they have the same
> user name but different passwords.
>
> When I try the following approach, one returns the values ok but the other
> device returns an authentication error.
>
>   UsmUser user1 = new UsmUser(new OctetString("authPrivMd5Des"),
>            AuthMD5.ID,
>            new OctetString("qazwsxed"),
>            PrivDES.ID,
>            new OctetString("qazwsxed"));
>
>    UsmUser user2 = new UsmUser(new OctetString("authPrivMd5Des"),
>            AuthMD5.ID,
>            new OctetString("dewsxzaq"),
>            PrivDES.ID,
>            new OctetString("dewsxzaq"));
>
>    snmp.getUSM().addUser(new OctetString("authPrivMd5Des"),user1);
>    snmp.getUSM().addUser(new OctetString("authPrivMd5Des"),user2);
>   ......
>   event = snmp.getBulk(pdu, target1);
>   event = snmp.getBulk(pdu, target2);
>
>
> I also tried setting the engine ID but that resulted in the same thing, one
> was ok but the other had an authentication error.
>
>    byte[] authEngineId1 = target1..getAuthoritativeEngineID();
>    byte[] authEngineId2 = target2..getAuthoritativeEngineID();
>
>    snmp.getUSM().addUser(new OctetString("authPrivMd5Des"), new
> OctetString(authEngineId1),user1);
>    snmp.getUSM().addUser(new OctetString("authPrivMd5Des"), new
> OctetString(authEngineId2),user2);
>
>
> Am I doing something wrong or is this a limitation of the api?
>
> Also is there an easy way to check if the response is an error and not
> valid
> data. For example, the following response is returning an authentication
> failure.
> REPORT[reqestID=2147483647, errorStatus=0, errorIndex=0,
> VBS[1.3.6.1.6.3.15.1.1.5.0 = 31]]
> Should I be checking the returned oid with what I requested? Is there a
> utility that maps the oid to the appropriate error type?
>
>
> Thank you in advance.
>
> Robert
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