snmp v3 authentication problem

[Tontonitch]

From tophoune (http://www.tontonitch.com/phpbb/viewtopic.php?f=2&t=3051)

Hello,
I’m using your plugin this plugin for many years now. It has always fulfilled my needs.
But today I have an issue with the snmp v3 authentication with security level AuthPriv.

In console, if I run this command :
sudo ./check_interface_table_v3t.pl -H 1.1.1.1 -l MyUSR -x MYPWD -X MYPASSPHRASE -L md5,aes
The result is : UNKNOWN - Not expected empty value for oid "1.3.6.1.2.1.1.3.0" (sysUpTime, mib RFC1213-MIB)

As a control , I ran this command:
snmpwalk -v 3 -u MyUSR -A MYPWD -a MD5 -x AES -X MYPASSPHRASE 1.1.1.1
the result is: Reason: authorizationError (access denied to that object)

suspecting a failure in the auth process I ran the same command with the security level mentionned:
snmpwalk -v 3 -u MyUSR -A MYPWD -a MD5 -x AES -X MYPASSPHRASE 1.1.1.1 -l AuthPriv
the result is that I can walk along the OIds:

IF-MIB::ifIndex.1 = INTEGER: 1
IF-MIB::ifIndex.2 = INTEGER: 2
IF-MIB::ifIndex.3 = INTEGER: 3
IF-MIB::ifIndex.4 = INTEGER: 4
IF-MIB::ifIndex.5 = INTEGER: 5
IF-MIB::ifIndex.6 = INTEGER: 6
IF-MIB::ifIndex.7 = INTEGER: 7
IF-MIB::ifIndex.8 = INTEGER: 8
IF-MIB::ifDescr.1 = STRING: GigabitEthernet0/0
IF-MIB::ifDescr.2 = STRING: GigabitEthernet0/1

I don ‘t understand why we have to mention the security level in the authentication process, but I suspect that it makes fail the plugin…
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