public static byte[] EncryptPayload(byte senderId, byte receiverId, byte[] homeId, byte sequenceNumber, byte[] receiverNonce,
byte[] senderNonce, byte[] networkKey, byte[] textToEncrypt, int generationCount, bool isRealKey)
{
var ret = new COMMAND_CLASS_SECURITY_2.SECURITY_2_MESSAGE_ENCAPSULATION {
sequenceNumber = sequenceNumber
};
InvariantPeerNodeId peerNodeId = new InvariantPeerNodeId(0);
var mpanKey = new byte[SecurityS2Utils.KEY_SIZE];
var ccmKey = new byte[SecurityS2Utils.KEY_SIZE];
var personalization = new byte[SecurityS2Utils.PERSONALIZATION_SIZE];
if (isRealKey)
{
SecurityS2Utils.NetworkKeyExpand(networkKey, ccmKey, personalization, mpanKey);
}
else
{
SecurityS2Utils.TempKeyExpand(networkKey, ccmKey, personalization, mpanKey);
}
SpanTable spanTable = new SpanTable();
spanTable.Add(peerNodeId, receiverNonce, 0, 0);
SpanContainer spanContainer = spanTable.GetContainer(peerNodeId);
spanContainer.InstantiateWithSenderNonce(senderNonce, personalization);
for (int i = 0; i < generationCount; i++)
{
spanContainer.NextNonce();
}
AAD aad = new AAD
{
SenderNodeId = senderId,
ReceiverNodeId = receiverId,
HomeId = homeId,
PayloadLength = (ushort)(textToEncrypt.Length + SecurityS2Utils.AUTH_DATA_HEADER_LENGTH),
SequenceNumber = sequenceNumber
};
aad.PayloadLength += (ushort)((byte[])ret).Length;
var cipherData = SecurityS2Utils.CcmEncryptAndAuth(ccmKey, spanContainer.Span, aad, textToEncrypt);
if (cipherData != null && cipherData.Length > 0)
{
ret.ccmCiphertextObject = new List <byte>(cipherData);
}
else
{
ret = null;
}
return(ret);
}
protected static byte[] EncryptS2Internal(byte[] key, byte[] iv, byte senderNodeId, byte receiverNodeId,
byte[] homeId,
ushort payloadLength, byte sequenceNumber, byte statusByte, byte[] extensionData, byte[] data)
{
var aad = new AAD
{
SenderNodeId = senderNodeId,
ReceiverNodeId = receiverNodeId,
HomeId = homeId,
SequenceNumber = sequenceNumber,
StatusByte = statusByte,
PayloadLength = payloadLength,
ExtensionData = extensionData
};
return(SecurityS2Utils.CcmEncryptAndAuth(key, iv, aad, data));
}