private static void QueuePayload(ZWaveNode node, SecutiryPayload payload)
{
var nodeSecurityData = GetSecurityData(node);
lock (nodeSecurityData.SecurePayload)
{
nodeSecurityData.SecurePayload.Add(payload);
if (nodeSecurityData.DeviceNonceTimer.ElapsedMilliseconds > 10000)
{
nodeSecurityData.IsWaitingForNonce = false;
}
if (!nodeSecurityData.IsWaitingForNonce)
{
RequestNonce(node);
}
}
}
public static void SendMessage(ZWaveNode node, byte[] message)
{
int length = message[5];
Utility.DebugLog(DebugMessageType.Information, "In sendMsg - SecurityHandler");
if (message.Length < 7)
{
Utility.DebugLog(DebugMessageType.Information, "Message too short");
}
if (message[3] != 0x13)
{
Utility.DebugLog(DebugMessageType.Information, "Invalid Message type");
}
if (length > 28)
{
SecutiryPayload t_payload = new SecutiryPayload();
t_payload.length = 28;
t_payload.part = 1;
byte[] t_message = new byte[t_payload.length];
System.Array.Copy(message, 6, t_message, 0, t_payload.length);
t_payload.message = t_message;
QueuePayload(node, t_payload);
SecutiryPayload t_payload2 = new SecutiryPayload();
t_payload2.length = length - 28;
t_payload2.part = 2;
byte[] t_message2 = new byte[t_payload.length];
System.Array.Copy(message, 34, t_message2, 0, t_payload2.length);
t_payload2.message = t_message2;
QueuePayload(node, t_payload2);
}
else
{
SecutiryPayload t_payload = new SecutiryPayload();
t_payload.length = length;
t_payload.part = 0;
byte[] t_message = new byte[t_payload.length];
System.Array.Copy(message, 6, t_message, 0, t_payload.length);
t_payload.message = t_message;
QueuePayload(node, t_payload);
}
}
// IN the mesage to be Encrypted
// OUT - true - message processed and sent - proceed to next one
// - false - we need to wait for the nonce report to come
private static bool EncryptMessage(ZWaveNode node, byte[] message)
{
SecurityData nodeSecurityData = GetSecurityData(node);
Utility.DebugLog(DebugMessageType.Information, "In EncryptMessage - secure_payload [" + nodeSecurityData.SecurePayload.Count + "] - " + nodeSecurityData.DeviceNonceTimer.ElapsedMilliseconds);
// if we get true we need to wait for the new Nonce
// if we get false we need to proceed
// if (sendRequestNonce())
// return false;
if (nodeSecurityData.DeviceNonceTimer.ElapsedMilliseconds > 10000)
{
return(false);
}
SecutiryPayload payload = null;
lock (nodeSecurityData.SecurePayload)
{
if (nodeSecurityData.SecurePayload.Count > 0)
{
payload = nodeSecurityData.SecurePayload.First();
nodeSecurityData.SecurePayload.Remove(payload);
}
}
if (payload != null)
{
int len = payload.length + 20;
byte[] t_message = new byte[len];
int i = 0;
t_message[i] = (byte)CommandClass.Security;
i++;
t_message[i] = (byte)SecurityCommand.MessageEncap;
byte[] initializationVector = new byte[16];
for (int a = 0; a < 8; a++)
{
initializationVector[a] = (byte)0xAA;
i++;
t_message[i] = initializationVector[a];
}
Array.Copy(nodeSecurityData.DeviceCurrentNonce, 0, initializationVector, 8, 8);
int sequence = 0;
if (payload.part == 1)
{
++nodeSecurityData.SequenceCounter;
sequence = nodeSecurityData.SequenceCounter & (byte)0x0f;
sequence |= (byte)0x10;
}
else if (payload.part == 2)
{
++nodeSecurityData.SequenceCounter;
sequence = nodeSecurityData.SequenceCounter & (byte)0x0f;
sequence |= (byte)0x30;
}
byte[] plaintextmsg = new byte[payload.length + 1];
plaintextmsg[0] = (byte)sequence;
for (int a = 0; a < payload.length; a++)
{
plaintextmsg[a + 1] = payload.message[a];
}
byte[] encryptedPayload = new byte[30];
encryptedPayload = AesWork.EncryptOfbMessage(nodeSecurityData.EncryptionKey, initializationVector, plaintextmsg);
Utility.DebugLog(DebugMessageType.Information, "authKey " + BitConverter.ToString(nodeSecurityData.AuthorizationKey));
Utility.DebugLog(DebugMessageType.Information, "EncryptKey " + BitConverter.ToString(nodeSecurityData.EncryptionKey));
Utility.DebugLog(DebugMessageType.Information, "Input Packet: " + BitConverter.ToString(plaintextmsg));
Utility.DebugLog(DebugMessageType.Information, "IV " + BitConverter.ToString(initializationVector));
Utility.DebugLog(DebugMessageType.Information, "encryptedPayload " + BitConverter.ToString(encryptedPayload));
for (int a = 0; a < payload.length + 1; ++a)
{
i++;
t_message[i] = encryptedPayload[a];
}
i++;
t_message[i] = nodeSecurityData.DeviceCurrentNonce[0];
//GenerateAuthentication
int start = 1;
byte[] mac = GenerateAuthentication(nodeSecurityData.AuthorizationKey, t_message, start, t_message.Length + 2 - start - 1, 0x01, node.Id, initializationVector);
for (int a = 0; a < 8; ++a)
{
i++;
t_message[i] = mac[a];
}
node.SendDataRequest(t_message);
Utility.DebugLog(DebugMessageType.Information, "In EncryptMessage - message sent");
if ((nodeSecurityData.IsNetworkKeySet == false) && payload.message[0] == (byte)CommandClass.Security && payload.message[1] == (byte)SecurityCommand.NetworkKeySet)
{
nodeSecurityData.IsNetworkKeySet = true;
nodeSecurityData.IsAddingNode = false;
}
return(true);
}
return(true);
}
private static void QueuePayload(ZWaveNode node, SecutiryPayload payload)
{
var nodeSecurityData = GetSecurityData(node);
lock (nodeSecurityData.SecurePayload)
{
nodeSecurityData.SecurePayload.Add(payload);
if (nodeSecurityData.DeviceNonceTimer.ElapsedMilliseconds > 10000)
nodeSecurityData.IsWaitingForNonce = false;
if (!nodeSecurityData.IsWaitingForNonce)
{
RequestNonce(node);
}
}
}
public static void SendMessage(ZWaveNode node, byte[] message)
{
int length = message[5];
Utility.DebugLog(DebugMessageType.Information, "In sendMsg - SecurityHandler");
if (message.Length < 7)
{
Utility.DebugLog(DebugMessageType.Information, "Message too short");
}
if (message[3] != 0x13)
{
Utility.DebugLog(DebugMessageType.Information, "Invalid Message type");
}
if (length > 28)
{
SecutiryPayload t_payload = new SecutiryPayload();
t_payload.length = 28;
t_payload.part = 1;
byte[] t_message = new byte[t_payload.length];
System.Array.Copy(message, 6, t_message, 0, t_payload.length);
t_payload.message = t_message;
QueuePayload(node, t_payload);
SecutiryPayload t_payload2 = new SecutiryPayload();
t_payload2.length = length - 28;
t_payload2.part = 2;
byte[] t_message2 = new byte[t_payload.length];
System.Array.Copy(message, 34, t_message2, 0, t_payload2.length);
t_payload2.message = t_message2;
QueuePayload(node, t_payload2);
}
else
{
SecutiryPayload t_payload = new SecutiryPayload();
t_payload.length = length;
t_payload.part = 0;
byte[] t_message = new byte[t_payload.length];
System.Array.Copy(message, 6, t_message, 0, t_payload.length);
t_payload.message = t_message;
QueuePayload(node, t_payload);
}
}