caesar, xor cipher mtasa

local h1, h2, h3 = debug.gethook()
debug.sethook()

local gsub = string.gsub
local char = string.char
local byte = string.byte
local bitXor = bitXor

local function encodeCaesarXor(str, key)
    return (gsub(str, '.', function(s)
        return char(((bitXor(s:byte(s), 5) + key) % 256))
    end))
end

local function decodeCaesarXor(str, key)
    return (gsub(str, '.', function(s)
        return char(((bitXor(byte(s)-key, 5)) % 256))
    end))
end

local function caesar(str, key)
    return (gsub(str, '.', function(s)
        return char((byte(s) + key) % 256)
    end))
end

local file = fileOpen('1.dff')
    local buffer = fileRead(file, file.size)
fileClose(file)

local t=getTickCount()
buffer = caesar(buffer, 1)
print('ms: '..(getTickCount()-t))

local file = fileCreate('3.dff')
    local buffer = fileWrite(file, buffer)
fileClose(file)

debug.sethook (_, h1, h2, h3)