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Why is USM_HMAC_TRUNC_LEN 24 bytes?? #3

@anyn99

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@anyn99

Could you shortly explain how your code was able to operate with SnmpB and net-snmp ?
I do my own implementation of snmpv3 right now and always found the clients to send 12 bytes as authentication tag and never 24 bytes (which, of course, would be more secure ;-) )

you check for auth_param_len to be exactly USM_HMAC_TRUNC_LEN , which is defined as 0x18.
How is that working??

greetings

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