From 1de5f9ac6f038bfed2230cc1272b253794b2f41a Mon Sep 17 00:00:00 2001
From: Alexander Pickering <alexandermpickering@gmail.com>
Date: Sun, 10 Jul 2016 17:04:29 -0400
Subject: Initial commit

---
 gamemode/shared/lockbox/ecb.lua | 191 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 191 insertions(+)
 create mode 100644 gamemode/shared/lockbox/ecb.lua

(limited to 'gamemode/shared/lockbox/ecb.lua')

diff --git a/gamemode/shared/lockbox/ecb.lua b/gamemode/shared/lockbox/ecb.lua
new file mode 100644
index 0000000..67f4514
--- /dev/null
+++ b/gamemode/shared/lockbox/ecb.lua
@@ -0,0 +1,191 @@
+local Array = include("array.lua");
+local Stream = include("stream.lua");
+local Queue = include("queue.lua");
+
+local Bit = include("bit.lua");
+
+local CBC = {};
+
+CBC.Cipher = function()
+
+	local public = {};
+
+	local key;
+	local blockCipher;
+	local padding;
+	local inputQueue;
+	local outputQueue;
+	local iv;
+
+	public.setKey = function(keyBytes)
+		print("Set key to:")
+		print(keyBytes)
+		key = keyBytes;
+		return public;
+	end
+
+	public.setBlockCipher = function(cipher)
+		blockCipher = cipher;
+		return public;
+	end
+
+	public.setPadding = function(paddingMode)
+		padding = paddingMode;
+		return public;
+	end
+
+	public.init = function()
+		inputQueue = Queue();
+		outputQueue = Queue();
+		iv = nil;
+		return public;
+	end
+
+	public.update = function(messageStream)
+		print("Entering update")
+		local byte = messageStream();
+		while (byte ~= nil) do
+			print("processing byte")
+			inputQueue.push(byte);
+			print("inputQueue.size is:" .. inputQueue.size())
+			print("blockCipher.blockSize:" .. blockCipher.blockSize)
+			if(inputQueue.size() >= blockCipher.blockSize) then
+				print("reading from queue")
+				local block = Array.readFromQueue(inputQueue,blockCipher.blockSize);
+				if(iv == nil) then
+					print("iv was nil, iv is now")
+					iv = block;
+					PrintTable(block)
+				else
+					print("iv was not nil, doing thing")
+					local out = Array.XOR(iv,block);
+					print("Calling encrypt with key:")
+					print(key)
+					print("and out")
+					print(out)
+					out = blockCipher.encrypt(key,out);
+					print("Out was:")
+					print(out)
+					Array.writeToQueue(outputQueue,out);
+					iv = out;
+				end
+			end
+			byte = messageStream();
+		end
+		print("Before update returned, blockCipher was ")
+		PrintTable(blockCipher)
+		return public;
+	end
+
+	public.finish = function()
+		paddingStream = padding(blockCipher.blockSize,inputQueue.getHead());
+		public.update(paddingStream);
+
+		return public;
+	end
+
+	public.getOutputQueue = function()
+		return outputQueue;
+	end
+
+	public.asHex = function()
+        print("Outputqueue is:")
+        PrintTable(outputQueue)
+		return Stream.toHex(outputQueue.pop);
+	end
+
+	public.asBytes = function()
+		return Stream.toArray(outputQueue.pop);
+	end
+
+	return public;
+
+end
+
+
+CBC.Decipher = function()
+
+	local public = {};
+
+	local key;
+	local blockCipher;
+	local padding;
+	local inputQueue;
+	local outputQueue;
+	local iv;
+
+	public.setKey = function(keyBytes)
+		key = keyBytes;
+		return public;
+	end
+
+	public.setBlockCipher = function(cipher)
+		blockCipher = cipher;
+		return public;
+	end
+
+	public.setPadding = function(paddingMode)
+		padding = paddingMode;
+		return public;
+	end
+
+	public.init = function()
+		inputQueue = Queue();
+		outputQueue = Queue();
+		iv = nil;
+		return public;
+	end
+
+	public.update = function(messageStream)
+		print("Updateing decipher with messagestream")
+		local byte = messageStream();
+		while (byte ~= nil) do
+			inputQueue.push(byte);
+			if(inputQueue.size() >= blockCipher.blockSize) then
+				local block = Array.readFromQueue(inputQueue,blockCipher.blockSize);
+
+				if(iv == nil) then
+					iv = block;
+					print("Setting iv to ")
+					PrintTable(iv)
+				else
+					local out = block;
+					out = blockCipher.decrypt(key,out);
+					out = Array.XOR(iv,out);
+					Array.writeToQueue(outputQueue,out);
+					iv = block;
+				end
+			end
+			byte = messageStream();
+		end
+		return public;
+	end
+
+	public.finish = function()
+		paddingStream = padding(blockCipher.blockSize,inputQueue.getHead());
+		public.update(paddingStream);
+
+		return public;
+	end
+
+	public.getOutputQueue = function()
+		return outputQueue;
+	end
+
+	public.asHex = function()
+		return Stream.toHex(outputQueue.pop);
+	end
+
+	public.asBytes = function()
+		return Stream.toArray(outputQueue.pop);
+	end
+
+	public.asString = function()
+		return Stream.toString(outputQueue.pop)
+	end
+
+	return public;
+
+end
+
+return CBC;
-- 
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