Syscrypt_Setup

--[[
    MIT License

    Copyright © 2016 Chickenbreadlp

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    SOFTWARE.
]]

local function get(branch, file)
    local response = http.get(
        "https://raw.githubusercontent.com/Chickenbreadlp/ReboOSt/"..branch.."/"..textutils.urlEncode( file )
    )

    if response then
        local sResponse = response.readAll()
        response.close()
        return sResponse
    else
    end
end
local function download(branch, filename, sFile)
    local sPath = shell.resolve( sFile )
    if fs.exists( sPath ) then
        return
    end

    -- GET the contents from pastebin
    local res = get(branch, filename)
    if res then
        local file = fs.open( sPath, "w" )
        file.write( res )
        file.close()
    end
end

local x = 1
local y = {}
local z = {}
local syscrypt_pass = ""

local function FirstCrypt(dir)
 if x == 1 then
  x = 0
  math.randomseed(tonumber(syscrypt_pass, 36))
  for i=1, 16 do
   y[i] = math.random(0, 0xFF)
   z[i] = math.random(0, 0xFF)
  end
  math.randomseed(math.random())
  local file = fs.open("/.syscrypt/reference_key", "w")
  file.writeLine('syscrypt_key = "'..hash.sha256(syscrypt_pass)..'"')
  file.close()
 end
 if dir == nil then dir = "" end
 local ListFiles = fs.list(dir)
 for _, file in ipairs(ListFiles) do
  if fs.isDir(dir..file) then
   if file ~= "rom" and file ~= ".syscrypt" then
    if fs.exists("/ReboOSt") and login == true then
     if file ~= ".SyscryptSetup" then
      FirstCrypt(dir.."/"..file.."/")
     end
    else
     FirstCrypt(dir.."/"..file.."/")
    end
   end
  else
   if file == "startup" then
   else
    local prog = fs.open(dir.."/"..file, "rb")
    local progData = {}
    local progbyte = prog.read()
    repeat
     table.insert(progData, progbyte)
     progbyte = prog.read()
    until progbyte == nil
    prog.close()
    progData = ccaes.encrypt_bytestream(progData, y, z)
    local prog = fs.open(dir.."/"..file, "wb")
    for i=1, #progData do
     prog.write(progData[i])
    end
    prog.close()
    sleep(0.01)
   end
  end
 end
end

if fs.exists("/.syscrypt") then
 error("Syscrypt is already installed on this pc")
else
 term.setTextColor(colors.yellow)
 print("Please enter your password")
 term.setTextColor(1)
 write("Password: ")
 syscrypt_pass = read("*")

 if syscrypt_pass == "" then
  error("No Password provided")
 else

  if fs.exists("/ReboOSt") and login == true then
   if fs.exists("/User/.SyscryptSetup/..meta") then
    fs.delete("/User/.SyscryptSetup/..meta")
   end
   fs.makeDir("/User/.SyscryptSetup")
   fs.copy("/User/"..UserName.."/..meta", "/User/.SyscryptSetup/..meta")
   UserName = ".SyscryptSetup"
  end

  fs.makeDir("/.syscrypt")
  shell.run("pastebin", "get", "rCYDnCxn", "/.syscrypt/ccaes")
  download("release", "ReboOSt/APIs/encryption", "/.syscrypt/hash")
  os.loadAPI("/.syscrypt/ccaes")
  os.loadAPI("/.syscrypt/hash")
  syscrypt_pass = hash.sha256(syscrypt_pass)
  FirstCrypt()
  if fs.exists("/startup") then
   fs.move("/startup", "/.syscrypt/boot")
  end
  shell.run("pastebin", "get", "s3PazEbG", "startup")
  os.reboot()
 end
end