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- --
- -- Adaptation of the Secure Hashing Algorithm (SHA-244/256)
- -- Found Here: http://lua-users.org/wiki/SecureHashAlgorithm
- --
- -- Using an adapted version of the bit library
- -- Found Here: https://bitbucket.org/Boolsheet/bslf/src/1ee664885805/bit.lua
- --
- local MOD = 2^32
- local MODM = MOD-1
- local function memoize(f)
- local mt = {}
- local t = setmetatable({}, mt)
- function mt:__index(k)
- local v = f(k)
- t[k] = v
- return v
- end
- return t
- end
- local function make_bitop_uncached(t, m)
- local function bitop(a, b)
- local res,p = 0,1
- while a ~= 0 and b ~= 0 do
- local am, bm = a % m, b % m
- res = res + t[am][bm] * p
- a = (a - am) / m
- b = (b - bm) / m
- p = p*m
- end
- res = res + (a + b) * p
- return res
- end
- return bitop
- end
- local function make_bitop(t)
- local op1 = make_bitop_uncached(t,2^1)
- local op2 = memoize(function(a) return memoize(function(b) return op1(a, b) end) end)
- return make_bitop_uncached(op2, 2 ^ (t.n or 1))
- end
- local bxor1 = make_bitop({[0] = {[0] = 0,[1] = 1}, [1] = {[0] = 1, [1] = 0}, n = 4})
- local function bxor(a, b, c, ...)
- local z = nil
- if b then
- a = a % MOD
- b = b % MOD
- z = bxor1(a, b)
- if c then z = bxor(z, c, ...) end
- return z
- elseif a then return a % MOD
- else return 0 end
- end
- local function band(a, b, c, ...)
- local z
- if b then
- a = a % MOD
- b = b % MOD
- z = ((a + b) - bxor1(a,b)) / 2
- if c then z = bit32_band(z, c, ...) end
- return z
- elseif a then return a % MOD
- else return MODM end
- end
- local function bnot(x) return (-1 - x) % MOD end
- local function rshift1(a, disp)
- if disp < 0 then return lshift(a,-disp) end
- return math.floor(a % 2 ^ 32 / 2 ^ disp)
- end
- local function rshift(x, disp)
- if disp > 31 or disp < -31 then return 0 end
- return rshift1(x % MOD, disp)
- end
- local function lshift(a, disp)
- if disp < 0 then return rshift(a,-disp) end
- return (a * 2 ^ disp) % 2 ^ 32
- end
- local function rrotate(x, disp)
- x = x % MOD
- disp = disp % 32
- local low = band(x, 2 ^ disp - 1)
- return rshift(x, disp) + lshift(low, 32 - disp)
- end
- 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 str2hexa(s)
- return (string.gsub(s, ".", function(c) return string.format("%02x", string.byte(c)) end))
- end
- local function num2s(l, n)
- local s = ""
- for i = 1, n do
- local rem = l % 256
- s = string.char(rem) .. s
- l = (l - rem) / 256
- end
- return s
- end
- local function s232num(s, i)
- local n = 0
- for i = i, i + 3 do n = n*256 + string.byte(s, i) end
- return n
- end
- local function preproc(msg, len)
- local extra = 64 - ((len + 9) % 64)
- len = num2s(8 * len, 8)
- msg = msg .. "\128" .. string.rep("\0", extra) .. len
- assert(#msg % 64 == 0)
- return msg
- end
- local function initH256(H)
- H[1] = 0x6a09e667
- H[2] = 0xbb67ae85
- H[3] = 0x3c6ef372
- H[4] = 0xa54ff53a
- H[5] = 0x510e527f
- H[6] = 0x9b05688c
- H[7] = 0x1f83d9ab
- H[8] = 0x5be0cd19
- return H
- end
- local function digestblock(msg, i, H)
- local w = {}
- for j = 1, 16 do w[j] = s232num(msg, i + (j - 1)*4) end
- for j = 17, 64 do
- local v = w[j - 15]
- local s0 = bxor(rrotate(v, 7), rrotate(v, 18), rshift(v, 3))
- v = w[j - 2]
- w[j] = w[j - 16] + s0 + w[j - 7] + bxor(rrotate(v, 17), rrotate(v, 19), rshift(v, 10))
- end
- local a, b, c, d, e, f, g, h = H[1], H[2], H[3], H[4], H[5], H[6], H[7], H[8]
- for i = 1, 64 do
- local s0 = bxor(rrotate(a, 2), rrotate(a, 13), rrotate(a, 22))
- local maj = bxor(band(a, b), band(a, c), band(b, c))
- local t2 = s0 + maj
- local s1 = bxor(rrotate(e, 6), rrotate(e, 11), rrotate(e, 25))
- local ch = bxor (band(e, f), band(bnot(e), g))
- local t1 = h + s1 + ch + k[i] + w[i]
- h, g, f, e, d, c, b, a = g, f, e, d + t1, c, b, a, t1 + t2
- end
- H[1] = band(H[1] + a)
- H[2] = band(H[2] + b)
- H[3] = band(H[3] + c)
- H[4] = band(H[4] + d)
- H[5] = band(H[5] + e)
- H[6] = band(H[6] + f)
- H[7] = band(H[7] + g)
- H[8] = band(H[8] + h)
- end
- local function sha256(msg)
- msg = preproc(msg, #msg)
- local H = initH256({})
- for i = 1, #msg, 64 do digestblock(msg, i, H) end
- return str2hexa(num2s(H[1], 4) .. num2s(H[2], 4) .. num2s(H[3], 4) .. num2s(H[4], 4) ..
- num2s(H[5], 4) .. num2s(H[6], 4) .. num2s(H[7], 4) .. num2s(H[8], 4))
- end
- local notlogged = 1
- while notlogged == 1 do
- local lB = paintutils.loadImage("Xeon/System/lightB")
- paintutils.drawImage(lB,1,1)
- term.setCursorPos(22,8)
- term.setTextColor(colors.black)
- print("Username:")
- paintutils.drawBox(16,10,36,10,colors.white)
- term.setTextColor(colors.black)
- term.setBackgroundColor(colors.white)
- term.setCursorPos(16,10)
- os.pullEvent = os.pullEventRaw
- user = read()
- if user == "" then
- shell.run("Xeon/System/login")
- end
- local ext = fs.exists("Xeon/Users/"..user)
- if ext then
- sleep(0,5)
- logtry = 1
- while logtry == 1 do
- usr = fs.open("Xeon/Users/"..user,"r")
- local fileData = {}
- local line = usr.readLine()
- repeat
- table.insert(fileData,line)
- line = usr.readLine()
- until line == nil
- usr.close()
- local rpass = fileData[1]
- paintutils.drawImage(lB,1,1)
- local eex = fs.exists("Xeon/Users/"..user..".paint")
- if eex then
- term.setCursorPos(2,2)
- term.setTextColor(colors.white)
- write("Xeon PC ")
- if peripheral.getType("bottom") == "modem" then
- rednet.open("bottom")
- elseif peripheral.getType("top") == "modem" then
- rednet.open("top")
- elseif peripheral.getType("back") == "modem" then
- rednet.open("back")
- elseif peripheral.getType("left") == "modem" then
- rednet.open("left")
- elseif peripheral.getType("right") == "modem" then
- rednet.open("right")
- elseif peripheral.getType("front") == "modem" then
- rednet.open("front")
- end
- local mb = rednet.isOpen("bottom")
- local mt = rednet.isOpen("top")
- local mbk = rednet.isOpen("back")
- local ml = rednet.isOpen("left")
- local mr = rednet.isOpen("right")
- local mf = rednet.isOpen("front")
- if mb or mt or mbk or ml or mr or mf == true then
- write("Modem Online")
- else
- write("Modem Missing")
- end
- local usrp = paintutils.loadImage("Xeon/Users/"..user..".paint")
- paintutils.drawImage(usrp,18,3)
- term.setBackgroundColor(colors.lightBlue)
- term.setTextColor(colors.black)
- term.setCursorPos(21,14)
- print("Password:")
- paintutils.drawBox(14,16,37,16,colors.white)
- term.setCursorPos(14,16)
- term.setTextColor(colors.black)
- local pass = read("*")
- local vpass = sha256(pass)
- if vpass == rpass then
- sleep(0.5)
- logtry = 3
- notlogged = 3
- shell.run("Xeon/System/system")
- else
- term.setCursorPos(14,16)
- term.setTextColor(colors.red)
- textutils.slowPrint(" Password is incorrect! ")
- sleep(1)
- term.setCursorPos(14,16)
- print(" ")
- end
- else
- term.setCursorPos(1,1)
- print("You havent designed a profile picture yet !")
- print()
- print("Press any button to continue !")
- local key = os.pullEvent("key")
- fs.copy("Xeon/System/defaultuser.paint","Xeon/Users/"..user..".paint")
- shell.run("paint Xeon/Users/"..user..".paint")
- end
- end
- else
- term.setCursorPos(16,10)
- term.setTextColor(colors.red)
- textutils.slowPrint(" User not found ! ")
- sleep(1)
- term.setCursorPos(16,10)
- print(" ")
- end
- end
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