private static IPrivacyProvider GetPrivacyProvider(string password, PasswordType passwordType,
string encryption, EncryptionType encryptionType)
{
IPrivacyProvider provider;
IAuthenticationProvider auth;
if (passwordType == PasswordType.SHA)
{
auth = new SHA1AuthenticationProvider(new OctetString(password));
}
else
{
auth = new MD5AuthenticationProvider(new OctetString(password));
}
if (encryptionType == EncryptionType.DES)
{
provider = new Security.DESPrivacyProvider(new OctetString(encryption), auth);
}
else
{
provider = new Security.AESPrivacyProvider(new OctetString(encryption), auth);
}
return(provider);
}
public async Task <OID> Handle(GetV3Query query)
{
var discovery = Messenger.GetNextDiscovery(SnmpType.GetRequestPdu);
var report = discovery.GetResponse(10000, new IPEndPoint(query.IpAddress, query.Port));
IPrivacyProvider provider;
if (query.EncryptionType == EncryptionType.DES)
{
provider = new Security.DESPrivacyProvider(
new OctetString(query.Encryption),
new MD5AuthenticationProvider(new OctetString(query.Password)));
}
else
{
provider = new Security.AESPrivacyProvider(
new OctetString(query.Encryption),
new MD5AuthenticationProvider(new OctetString(query.Password)));
}
var request = new GetRequestMessage(
Lextm.SharpSnmpLib.VersionCode.V3,
Messenger.NextMessageId,
Messenger.NextRequestId,
new OctetString(query.UserName),
new List <Variable> {
new Variable(new ObjectIdentifier(query.OID_Id))
},
provider,
Messenger.MaxMessageSize,
report);
var reply = await request.GetResponseAsync(new IPEndPoint(query.IpAddress, query.Port));
var oid = reply
.Pdu().Variables
.FirstOrDefault(variable => variable.Id.ToString() == query.OID_Id);
if (oid == null)
{
throw new KeyNotFoundException($"Cannot find variable with ID {query.OID_Id}");
}
if (reply.Pdu().ErrorStatus.ToInt32() != 0) // != ErrorCode.NoError
{
throw ErrorException.Create("error in response", query.IpAddress, reply);
}
return(new OID {
Id = oid.Id.ToString(), Value = oid.Data.ToString()
});
}
public async Task Handle(SetV3Command command)
{
Discovery discovery = Messenger.GetNextDiscovery(SnmpType.GetRequestPdu);
ReportMessage report = discovery.GetResponse(10000, new IPEndPoint(command.IpAddress, command.Port));
IPrivacyProvider provider;
if (command.EncryptionType == EncryptionType.DES)
{
provider = new Security.DESPrivacyProvider(
new OctetString(command.Encryption),
new MD5AuthenticationProvider(new OctetString(command.Password)));
}
else
{
provider = new Security.AESPrivacyProvider(
new OctetString(command.Encryption),
new MD5AuthenticationProvider(new OctetString(command.Password)));
}
SetRequestMessage request = new SetRequestMessage(
Lextm.SharpSnmpLib.VersionCode.V3,
Messenger.NextMessageId,
Messenger.NextRequestId,
new OctetString(command.UserName),
new List <Variable> {
new Variable(new ObjectIdentifier(command.OID.Id), new OctetString(command.OID.Value))
},
provider,
report);
ISnmpMessage reply = await request.GetResponseAsync(new IPEndPoint(command.IpAddress, command.Port));
if (reply.Pdu().ErrorStatus.ToInt32() != 0) // != ErrorCode.NoError
{
throw ErrorException.Create("error in response", command.IpAddress, reply);
}
}
