I am using Adventnet 4.0.0 API to receive traps. When AES 128 is used as privacy authentication it is successfully received, whereas when I change to use AES 256 it is not receiving. But Wireshark is able to receive and decode properly.
Any thing I am missing or Adventnet 4.0.0 is not capable of handling AES 256?
The WebNMS page for the Java SNMP API lists the supported encryption schemes:
SNMPv3 security: Support for HMAC-SHA-96, HMAC-MD5-96, CBC-DES, CBC-3DES, CFB-AES-128, CFB-AES-192, CFB-AES-256 bit encryption.
If you don't think it's working like it should, it's always worth shooting off an email to their support crew.
Hard to say more than that without seeing your code.