New program system; Capitalized folders

3 files changed, 537 insertions, 0 deletions

diff --git a/System/apis/flib.lua b/System/apis/flib.lua
new file mode 100644
index 0000000..c3b7150
--- /dev/null
+++ b/System/apis/flib.lua
@@ -0,0 +1,124 @@
+--[[
+	fLib by NDFJay
+]]--
+function exists(path)
+	local file = assert(io.open(path, "r"))
+	if file ~= nil then
+		file:close()
+		return true
+	end
+	
+	return false
+end
+
+function getTable(path)
+	if exists(path) then
+		local file = io.open(path, "r")
+		local lines = {}
+		local i = 1
+		local line = file:read("*l")
+		while line ~= nil do
+			lines[i] = line
+			line = file:read("*l")
+			i = i + 1
+		end
+		file:close()
+		return lines
+	end
+	return {}
+end
+
+function getLine(path, n)
+	if exists(path) then
+		local lines = getTable(path)
+		return lines[n]
+	end
+	return ""
+end
+
+function getText(path)
+	if exists(path) then
+		local file = assert(io.open(path, "r"))
+		return file:read("*a")
+	end
+	return ""
+end
+
+function fappend(path, text)
+	local file = assert(io.open(path, "a"))
+	file:write(text.."\n")
+	file:close()
+end 
+
+function fwrite(path, text)
+	local file = assert(io.open(path, "w"))
+	file:write(text)
+	file:close()
+end
+
+function fwriteAtStart(path, text)
+	local _text = getText(path)
+	fwrite(path, text.."\n".._text)
+end
+
+function fwriteFromTable(path, t)
+	local text = ""
+	for _, line in pairs(t) do
+		text = text..line.."\n"
+	end
+	fwrite(path, text)
+end
+
+function fappendFromTable(path, t)
+	local text = ""
+	for _, line in pairs(t) do
+		text = text..line.."\n"
+	end
+	fappend(path, text)
+end 
+
+function fwriteAtStartFromTable(path, t)
+	local text = ""
+	for _, line in pairs(t) do
+		text = text..line.."\n"
+	end
+	fwriteAtStart(path, text)
+end
+
+function replaceLine(path, n, text)
+	local lines = getTable(path)
+	lines[n] = text
+	fwriteFromTable(path, lines)
+end
+
+function getName(path)
+	if exists(path) then
+		local lastSlashPos = 1
+		for i = 1, path:len() do
+			if path:sub(i, i) == "/" then
+				lastSlashPos = i
+			end
+		end
+		
+		return path:sub(lastSlashPos + 1)
+	end
+	return ""
+end
+
+function getPath(path)
+	if exists(path) then
+		local lastSlashPos = 1
+		for i = 1, path:len() do
+			if path:sub(i, i) == "/" then
+				lastSlashPos = i
+			end
+		end
+		
+		return path:sub(1, lastSlashPos)
+	end
+	return ""
+end
+
+function fremove(path)
+	os.remove(path)
+end
\ No newline at end of file
diff --git a/System/apis/json.lua b/System/apis/json.lua
new file mode 100644
index 0000000..3bef482
--- /dev/null
+++ b/System/apis/json.lua
@@ -0,0 +1,209 @@
+------------------------------------------------------------------ utils
+local controls = {["\n"]="\\n", ["\r"]="\\r", ["\t"]="\\t", ["\b"]="\\b", ["\f"]="\\f", ["\""]="\\\"", ["\\"]="\\\\"}
+
+local function isArray(t)
+	local max = 0
+	for k,v in pairs(t) do
+		if type(k) ~= "number" then
+			return false
+		elseif k > max then
+			max = k
+		end
+	end
+	return max == #t
+end
+
+local whites = {['\n']=true; ['\r']=true; ['\t']=true; [' ']=true; [',']=true; [':']=true}
+function removeWhite(str)
+	while whites[str:sub(1, 1)] do
+		str = str:sub(2)
+	end
+	return str
+end
+
+------------------------------------------------------------------ encoding
+
+local function encodeCommon(val, pretty, tabLevel, tTracking)
+	local str = ""
+
+	-- Tabbing util
+	local function tab(s)
+		str = str .. ("\t"):rep(tabLevel) .. s
+	end
+
+	local function arrEncoding(val, bracket, closeBracket, iterator, loopFunc)
+		str = str .. bracket
+		if pretty then
+			str = str .. "\n"
+			tabLevel = tabLevel + 1
+		end
+		for k,v in iterator(val) do
+			tab("")
+			loopFunc(k,v)
+			str = str .. ","
+			if pretty then str = str .. "\n" end
+		end
+		if pretty then
+			tabLevel = tabLevel - 1
+		end
+		if str:sub(-2) == ",\n" then
+			str = str:sub(1, -3) .. "\n"
+		elseif str:sub(-1) == "," then
+			str = str:sub(1, -2)
+		end
+		tab(closeBracket)
+	end
+
+	-- Table encoding
+	if type(val) == "table" then
+		assert(not tTracking[val], "Cannot encode a table holding itself recursively")
+		tTracking[val] = true
+		if isArray(val) then
+			arrEncoding(val, "[", "]", ipairs, function(k,v)
+				str = str .. encodeCommon(v, pretty, tabLevel, tTracking)
+			end)
+		else
+			arrEncoding(val, "{", "}", pairs, function(k,v)
+				assert(type(k) == "string", "JSON object keys must be strings", 2)
+				str = str .. encodeCommon(k, pretty, tabLevel, tTracking)
+				str = str .. (pretty and ": " or ":") .. encodeCommon(v, pretty, tabLevel, tTracking)
+			end)
+		end
+	-- String encoding
+	elseif type(val) == "string" then
+		str = '"' .. val:gsub("[%c\"\\]", controls) .. '"'
+	-- Number encoding
+	elseif type(val) == "number" or type(val) == "boolean" then
+		str = tostring(val)
+	else
+		error("JSON only supports arrays, objects, numbers, booleans, and strings", 2)
+	end
+	return str
+end
+
+function encode(val)
+	return encodeCommon(val, false, 0, {})
+end
+
+function encodePretty(val)
+	return encodeCommon(val, true, 0, {})
+end
+
+------------------------------------------------------------------ decoding
+
+local decodeControls = {}
+for k,v in pairs(controls) do
+	decodeControls[v] = k
+end
+
+function parseBoolean(str)
+	if str:sub(1, 4) == "true" then
+		return true, removeWhite(str:sub(5))
+	else
+		return false, removeWhite(str:sub(6))
+	end
+end
+
+function parseNull(str)
+	return nil, removeWhite(str:sub(5))
+end
+
+local numChars = {['e']=true; ['E']=true; ['+']=true; ['-']=true; ['.']=true}
+function parseNumber(str)
+	local i = 1
+	while numChars[str:sub(i, i)] or tonumber(str:sub(i, i)) do
+		i = i + 1
+	end
+	local val = tonumber(str:sub(1, i - 1))
+	str = removeWhite(str:sub(i))
+	return val, str
+end
+
+function parseString(str)
+	str = str:sub(2)
+	local s = ""
+	while str:sub(1,1) ~= "\"" do
+		local next = str:sub(1,1)
+		str = str:sub(2)
+		assert(next ~= "\n", "Unclosed string")
+
+		if next == "\\" then
+			local escape = str:sub(1,1)
+			str = str:sub(2)
+
+			next = assert(decodeControls[next..escape], "Invalid escape character")
+		end
+
+		s = s .. next
+	end
+	return s, removeWhite(str:sub(2))
+end
+
+function parseArray(str)
+	str = removeWhite(str:sub(2))
+
+	local val = {}
+	local i = 1
+	while str:sub(1, 1) ~= "]" do
+		local v = nil
+		v, str = parseValue(str)
+		val[i] = v
+		i = i + 1
+		str = removeWhite(str)
+	end
+	str = removeWhite(str:sub(2))
+	return val, str
+end
+
+function parseObject(str)
+	str = removeWhite(str:sub(2))
+
+	local val = {}
+	while str:sub(1, 1) ~= "}" do
+		local k, v = nil, nil
+		k, v, str = parseMember(str)
+		val[k] = v
+		str = removeWhite(str)
+	end
+	str = removeWhite(str:sub(2))
+	return val, str
+end
+
+function parseMember(str)
+	local k = nil
+	k, str = parseValue(str)
+	local val = nil
+	val, str = parseValue(str)
+	return k, val, str
+end
+
+function parseValue(str)
+	local fchar = str:sub(1, 1)
+	if fchar == "{" then
+		return parseObject(str)
+	elseif fchar == "[" then
+		return parseArray(str)
+	elseif tonumber(fchar) ~= nil or numChars[fchar] then
+		return parseNumber(str)
+	elseif str:sub(1, 4) == "true" or str:sub(1, 5) == "false" then
+		return parseBoolean(str)
+	elseif fchar == "\"" then
+		return parseString(str)
+	elseif str:sub(1, 4) == "null" then
+		return parseNull(str)
+	end
+	return nil
+end
+
+function decode(str)
+	str = removeWhite(str)
+	t = parseValue(str)
+	return t
+end
+
+function decodeFromFile(path)
+	local file = assert(fs.open(path, "r"))
+	local decoded = decode(file.readAll())
+	file.close()
+	return decoded
+end
\ No newline at end of file
diff --git a/System/apis/sha256.lua b/System/apis/sha256.lua
new file mode 100644
index 0000000..5842c8d
--- /dev/null
+++ b/System/apis/sha256.lua
@@ -0,0 +1,204 @@
+-- SHA-256, HMAC and PBKDF2 functions in ComputerCraft
+-- By Anavrins
+-- For help and details, you can PM me on the CC forums
+-- http://www.computercraft.info/forums2/index.php?/user/12870-anavrins
+-- You may use this code in your projects without asking me, as long as credit is given
+
+-- Pastebin: https://pastebin.com/6UV4qfNF
+-- Usage: https://pastebin.com/q2SQ7eRg
+-- Last update: May 13, 2019
+
+local mod32 = 2^32
+local band    = bit32 and bit32.band or bit.band
+local bnot    = bit32 and bit32.bnot or bit.bnot
+local bxor    = bit32 and bit32.bxor or bit.bxor
+local blshift = bit32 and bit32.lshift or bit.blshift
+local upack   = unpack
+
+local function rrotate(n, b)
+	local s = n/(2^b)
+	local f = s%1
+	return (s-f) + f*mod32
+end
+ local function brshift(int, by) -- Thanks bit32 for bad rshift
+	local s = int / (2^by)
+	return s - s%1
+end
+
+local H = {
+	0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
+	0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19,
+}
+
+local K = {
+	0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
+	0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
+	0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
+	0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
+	0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
+	0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
+	0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
+	0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,
+}
+
+local function counter(incr)
+	local t1, t2 = 0, 0
+	if 0xFFFFFFFF - t1 < incr then
+		t2 = t2 + 1
+		t1 = incr - (0xFFFFFFFF - t1) - 1		
+	else t1 = t1 + incr
+	end
+	return t2, t1
+end
+
+local function BE_toInt(bs, i)
+	return blshift((bs[i] or 0), 24) + blshift((bs[i+1] or 0), 16) + blshift((bs[i+2] or 0), 8) + (bs[i+3] or 0)
+end
+
+local function preprocess(data)
+	local len = #data
+	local proc = {}
+	data[#data+1] = 0x80
+	while #data%64~=56 do data[#data+1] = 0 end
+	local blocks = math.ceil(#data/64)
+	for i = 1, blocks do
+		proc[i] = {}
+		for j = 1, 16 do
+			proc[i][j] = BE_toInt(data, 1+((i-1)*64)+((j-1)*4))
+		end
+	end
+	proc[blocks][15], proc[blocks][16] = counter(len*8)
+	return proc
+end
+
+local function digestblock(w, C)
+	for j = 17, 64 do
+		local v = w[j-15]
+		local s0 = bxor(bxor(rrotate(w[j-15], 7), rrotate(w[j-15], 18)), brshift(w[j-15], 3))
+		local s1 = bxor(bxor(rrotate(w[j-2], 17), rrotate(w[j-2], 19)), brshift(w[j-2], 10))
+		w[j] = (w[j-16] + s0 + w[j-7] + s1)%mod32
+	end
+	local a, b, c, d, e, f, g, h = upack(C)
+	for j = 1, 64 do
+		local S1 = bxor(bxor(rrotate(e, 6), rrotate(e, 11)), rrotate(e, 25))
+		local ch = bxor(band(e, f), band(bnot(e), g))
+		local temp1 = (h + S1 + ch + K[j] + w[j])%mod32
+		local S0 = bxor(bxor(rrotate(a, 2), rrotate(a, 13)), rrotate(a, 22))
+		local maj = bxor(bxor(band(a, b), band(a, c)), band(b, c))
+		local temp2 = (S0 + maj)%mod32
+		h, g, f, e, d, c, b, a = g, f, e, (d+temp1)%mod32, c, b, a, (temp1+temp2)%mod32
+	end
+	C[1] = (C[1] + a)%mod32
+	C[2] = (C[2] + b)%mod32
+	C[3] = (C[3] + c)%mod32
+	C[4] = (C[4] + d)%mod32
+	C[5] = (C[5] + e)%mod32
+	C[6] = (C[6] + f)%mod32
+	C[7] = (C[7] + g)%mod32
+	C[8] = (C[8] + h)%mod32
+	return C
+end
+
+local mt = {
+	__tostring = function(a) return string.char(unpack(a)) end,
+	__index = {
+		toHex = function(self, s) return ("%02x"):rep(#self):format(unpack(self)) end,
+		isEqual = function(self, t)
+			if type(t) ~= "table" then return false end
+			if #self ~= #t then return false end
+			local ret = 0
+			for i = 1, #self do
+				ret = bit32.bor(ret, bxor(self[i], t[i]))
+			end
+			return ret == 0
+		end
+	}
+}
+
+	function toBytes(t, n)
+	local b = {}
+	for i = 1, n do
+		b[(i-1)*4+1] = band(brshift(t[i], 24), 0xFF)
+		b[(i-1)*4+2] = band(brshift(t[i], 16), 0xFF)
+		b[(i-1)*4+3] = band(brshift(t[i], 8), 0xFF)
+		b[(i-1)*4+4] = band(t[i], 0xFF)
+	end
+	return setmetatable(b, mt)
+end
+
+	function digest(data)
+	local data = data or ""
+	data = type(data) == "table" and {upack(data)} or {tostring(data):byte(1,-1)}
+
+	data = preprocess(data)
+	local C = {upack(H)}
+	for i = 1, #data do C = digestblock(data[i], C) end
+	return toBytes(C, 8)
+end
+
+	function hmac(data, key)
+	local data = type(data) == "table" and {upack(data)} or {tostring(data):byte(1,-1)}
+	local key = type(key) == "table" and {upack(key)} or {tostring(key):byte(1,-1)}
+
+	local blocksize = 64
+
+	key = #key > blocksize and digest(key) or key
+
+	local ipad = {}
+	local opad = {}
+	local padded_key = {}
+
+	for i = 1, blocksize do
+		ipad[i] = bxor(0x36, key[i] or 0)
+		opad[i] = bxor(0x5C, key[i] or 0)
+	end
+
+	for i = 1, #data do
+		ipad[blocksize+i] = data[i]
+	end
+
+	ipad = digest(ipad)
+
+	for i = 1, blocksize do
+		padded_key[i] = opad[i]
+		padded_key[blocksize+i] = ipad[i]
+	end
+
+	return digest(padded_key)
+end
+
+	function pbkdf2(pass, salt, iter, dklen)
+	local salt = type(salt) == "table" and salt or {tostring(salt):byte(1,-1)}
+	local hashlen = 32
+	local dklen = dklen or 32
+	local block = 1
+	local out = {}
+
+	while dklen > 0 do
+		local ikey = {}
+		local isalt = {upack(salt)}
+		local clen = dklen > hashlen and hashlen or dklen
+
+		isalt[#isalt+1] = band(brshift(block, 24), 0xFF)
+		isalt[#isalt+1] = band(brshift(block, 16), 0xFF)
+		isalt[#isalt+1] = band(brshift(block, 8), 0xFF)
+		isalt[#isalt+1] = band(block, 0xFF)
+
+		for j = 1, iter do
+			isalt = hmac(isalt, pass)
+			for k = 1, clen do ikey[k] = bxor(isalt[k], ikey[k] or 0) end
+			if j % 200 == 0 then os.queueEvent("PBKDF2", j) coroutine.yield("PBKDF2") end
+		end
+		dklen = dklen - clen
+		block = block+1
+		for k = 1, clen do out[#out+1] = ikey[k] end
+	end
+
+	return setmetatable(out, mt)
+end
+
+return {
+	digest = digest,
+	hmac   = hmac,
+	pbkdf2 = pbkdf2,
+}
\ No newline at end of file