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v3_usm_test.go
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v3_usm_test.go
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package gosnmp
import (
"encoding/hex"
"io"
"log"
"testing"
"github.com/stretchr/testify/require"
)
/**
* This tests use hex dumps from real network traffic produced using net-snmp's snmpget with demo.snmplabs.com as SNMP agent.
*/
func authorativeEngineID(t *testing.T) string {
// engine ID of demo.snmplabs.com
engineID, err := hex.DecodeString("80004fb805636c6f75644dab22cc")
require.NoError(t, err, "EngineId decoding failed.")
return string(engineID)
}
func correctKeySHA224(t *testing.T) []byte {
correctKey, err := hex.DecodeString("f2a2ebaa9677ad286255596286ca4fb7ec22f52405cb0aac334c5f15")
require.NoError(t, err, "Correct key initialization failed.")
return correctKey
}
func packetSHA224NoAuthentication(t *testing.T) []byte {
packet, err := hex.DecodeString("308184020103300e02025f84020205c0040105020103043f303d040e80004fb805636c6f75644dab22cc02012b0203203ea5040f7573722d7368613232342d6e6f6e650410000000000000000000000000000000000400302e040e80004fb805636c6f75644dab22cc0400a01a02023ced020100020100300e300c06082b060102010101000500")
require.NoError(t, err, "Non-authenticated packet data SHA224 decoding failed.")
return packet
}
func packetSHA224Authenticated(t *testing.T) []byte {
packet, err := hex.DecodeString("308184020103300e02025f84020205c0040105020103043f303d040e80004fb805636c6f75644dab22cc02012b0203203ea5040f7573722d7368613232342d6e6f6e65041066cd2d9b04cd48b02a9df0c77dc3415d0400302e040e80004fb805636c6f75644dab22cc0400a01a02023ced020100020100300e300c06082b060102010101000500")
require.NoError(t, err, "Authenticated packet data SHA224 decoding failed.")
return packet
}
func packetSHA224AuthenticationParams(t *testing.T) string {
params, err := hex.DecodeString("66cd2d9b04cd48b02a9df0c77dc3415d")
require.NoError(t, err, "Authentication parameters SHA224 decoding failed.")
return string(params)
}
func TestAuthenticationSHA224(t *testing.T) {
var err error
sp := UsmSecurityParameters{
localAESSalt: 0,
localDESSalt: 0,
AuthoritativeEngineBoots: 43,
AuthoritativeEngineID: authorativeEngineID(t),
AuthoritativeEngineTime: 2113189,
UserName: "usr-sha224-none",
AuthenticationParameters: "",
PrivacyParameters: nil,
AuthenticationProtocol: SHA224,
PrivacyProtocol: 0,
AuthenticationPassphrase: "authkey1",
PrivacyPassphrase: "",
SecretKey: nil,
Logger: NewLogger(log.New(io.Discard, "", 0)),
PrivacyKey: nil,
}
sp.SecretKey, err = genlocalkey(sp.AuthenticationProtocol,
sp.AuthenticationPassphrase,
sp.AuthoritativeEngineID)
require.NoError(t, err, "Generation of key failed")
require.Equal(t, correctKeySHA224(t), sp.SecretKey, "Wrong key generated")
srcPacket := packetSHA224NoAuthentication(t)
err = sp.authenticate(srcPacket)
require.NoError(t, err, "Authentication of packet failed")
require.Equal(t, packetSHA224Authenticated(t), srcPacket, "Wrong message authentication parameters.")
}
func TestIsAuthenticaSHA224(t *testing.T) {
var err error
sp := UsmSecurityParameters{
localAESSalt: 0,
localDESSalt: 0,
AuthoritativeEngineBoots: 43,
AuthoritativeEngineID: authorativeEngineID(t),
AuthoritativeEngineTime: 2113189,
UserName: "usr-sha224-none",
AuthenticationParameters: packetSHA224AuthenticationParams(t),
PrivacyParameters: nil,
AuthenticationProtocol: SHA224,
PrivacyProtocol: 0,
AuthenticationPassphrase: "authkey1",
PrivacyPassphrase: "",
SecretKey: nil,
PrivacyKey: nil,
Logger: NewLogger(log.New(io.Discard, "", 0)),
}
sp.SecretKey, err = genlocalkey(sp.AuthenticationProtocol,
sp.AuthenticationPassphrase,
sp.AuthoritativeEngineID)
require.NoError(t, err, "Generation of key failed")
require.Equal(t, correctKeySHA224(t), sp.SecretKey, "Wrong key generated")
srcPacket := packetSHA224NoAuthentication(t)
snmpPacket := SnmpPacket{
SecurityParameters: &sp,
}
authentic, err := sp.isAuthentic(srcPacket, &snmpPacket)
require.NoError(t, err, "Authentication check of key failed")
require.True(t, authentic, "Packet was not considered to be authentic")
}
func correctKeySHA512(t *testing.T) []byte {
correctKey, err := hex.DecodeString("c336e5e6396926813d623984610e8f0cd7f419da75c82ac50927c84fd92027f7cdd849ce983036dca67bfb1e8fde2a8c2d45cd2f0d3e0b0b929f7dda462a58cf")
require.NoError(t, err, "Correct key initialization failed.")
return correctKey
}
func packetSHA512NoAuthentication(t *testing.T) []byte {
packet, err := hex.DecodeString("3081a4020103300e0202366e020205c0040105020103045f305d040e80004fb805636c6f75644dab22cc02012b0203203eea040f7573722d7368613531322d6e6f6e6504300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400302e040e80004fb805636c6f75644dab22cc0400a01a020214d9020100020100300e300c06082b060102010101000500")
require.NoError(t, err, "Not-authenticated packet data SHA512 decoding failed.")
return packet
}
func packetSHA512Authenticated(t *testing.T) []byte {
packet, err := hex.DecodeString("3081a4020103300e0202366e020205c0040105020103045f305d040e80004fb805636c6f75644dab22cc02012b0203203eea040f7573722d7368613531322d6e6f6e65043026f8087ced336a394642b8698eba9810929a9bfa44afbf43975a7ad6c4cc55bd279b549a77ec56d791467612747d6f570400302e040e80004fb805636c6f75644dab22cc0400a01a020214d9020100020100300e300c06082b060102010101000500")
require.NoError(t, err, "Authenticated packet data SHA512 decoding failed.")
return packet
}
func packetSHA512AuthenticationParams(t *testing.T) string {
params, err := hex.DecodeString("26f8087ced336a394642b8698eba9810929a9bfa44afbf43975a7ad6c4cc55bd279b549a77ec56d791467612747d6f57")
require.NoError(t, err, "Authentication parameters SHA512 decoding failed.")
return string(params)
}
func TestAuthenticationSHA512(t *testing.T) {
var err error
sp := UsmSecurityParameters{
localAESSalt: 0,
localDESSalt: 0,
AuthoritativeEngineBoots: 43,
AuthoritativeEngineID: authorativeEngineID(t),
AuthoritativeEngineTime: 2113258,
UserName: "usr-sha512-none",
AuthenticationParameters: "",
PrivacyParameters: nil,
AuthenticationProtocol: SHA512,
PrivacyProtocol: 0,
AuthenticationPassphrase: "authkey1",
PrivacyPassphrase: "",
SecretKey: nil,
PrivacyKey: nil,
Logger: NewLogger(log.New(io.Discard, "", 0)),
}
sp.SecretKey, err = genlocalkey(sp.AuthenticationProtocol,
sp.AuthenticationPassphrase,
sp.AuthoritativeEngineID)
require.NoError(t, err, "Generation of key failed")
require.Equal(t, correctKeySHA512(t), sp.SecretKey, "Wrong key generated")
srcPacket := packetSHA512NoAuthentication(t)
err = sp.authenticate(srcPacket)
require.NoError(t, err, "Generation of key failed")
require.Equal(t, packetSHA512Authenticated(t), srcPacket, "Wrong message authentication parameters.")
}
func TestIsAuthenticaSHA512(t *testing.T) {
var err error
sp := UsmSecurityParameters{
localAESSalt: 0,
localDESSalt: 0,
AuthoritativeEngineBoots: 43,
AuthoritativeEngineID: authorativeEngineID(t),
AuthoritativeEngineTime: 2113189,
UserName: "usr-sha512-none",
AuthenticationParameters: packetSHA512AuthenticationParams(t),
PrivacyParameters: nil,
AuthenticationProtocol: SHA512,
PrivacyProtocol: 0,
AuthenticationPassphrase: "authkey1",
PrivacyPassphrase: "",
SecretKey: nil,
Logger: NewLogger(log.New(io.Discard, "", 0)),
PrivacyKey: nil,
}
sp.SecretKey, err = genlocalkey(sp.AuthenticationProtocol,
sp.AuthenticationPassphrase,
sp.AuthoritativeEngineID)
require.NoError(t, err, "Generation of key failed")
require.Equal(t, correctKeySHA512(t), sp.SecretKey, "Wrong key generated")
srcPacket := packetSHA512NoAuthentication(t)
snmpPacket := SnmpPacket{
SecurityParameters: &sp,
}
authentic, err := sp.isAuthentic(srcPacket, &snmpPacket)
require.NoError(t, err, "Authentication check of key failed")
require.True(t, authentic, "Packet was not considered to be authentic")
}