AES Encryption

os.loadAPI("aeslua")
local iv = {}
for i = 1, 16 do iv[i] = math.random(1, 255) end
aeslua.encrypt("MyKey", "My Message", aealua.AES128, aeslua.CBCMODE, iv)
aeslua.decrypt("MyKey", "My Encrypted Message", aealua.AES128, aeslua.CBCMODE, iv)

skwerlman, on 29 May 2014 - 11:51 AM said:

Were you aware of the bit API? It's a CC builtin.

theoriginalbit, on 29 May 2014 - 12:06 PM said:

skwerlman, on 29 May 2014 - 11:51 AM said:

Were you aware of the bit API? It's a CC builtin.

The CC bit API doesn't have to_bits anymore, and the shift operations don't work the same as in that external API.

Retriever, on 31 May 2014 - 05:44 PM said:

Nice and simple API, been trying to get RSA working in CC but i don't understand the math enough to get it fully working and the encryption times were hugely impractical so this will do very nicely :)/>

SquidDev, on 29 May 2014 - 11:33 AM said:

Unknown to me this has already been implemented before, by KleinRefrigerator and KillaVanilla. This implimentation gives you access to 128, 192 and 265 bit versions and ECB, CBC, CFB, OFB modes and so is more flexible.

Anavrins, on 03 June 2014 - 02:26 AM said:

SquidDev, on 29 May 2014 - 11:33 AM said:

Unknown to me this has already been implemented before, by KleinRefrigerator and KillaVanilla. This implimentation gives you access to 128, 192 and 265 bit versions and ECB, CBC, CFB, OFB modes and so is more flexible.

What about CTR mode?
Would be nice to have it too :P/>
Killa's implementation of CTR is broken…

thediamondgames, on 05 June 2014 - 11:42 AM said:

Could I use this implementation in my PockyOS (I will give credit)

SquidDev, on 05 June 2014 - 11:46 AM said:

thediamondgames, on 05 June 2014 - 11:42 AM said:

Could I use this implementation in my PockyOS (I will give credit)

Sure, I'm not fussed what happens with it. Thanks for asking though.

thediamondgames, on 05 June 2014 - 12:49 PM said:

When I encrypt my password -snip- While trying to decrypt password -snip-

theoriginalbit, on 05 June 2014 - 01:02 PM said:

thediamondgames, on 05 June 2014 - 12:49 PM said:

When I encrypt my password -snip- While trying to decrypt password -snip-

Don't use encryption for passwords, use hashing. I've written up reasons for this a lot, so I'll just link any I can quickly find instead of typing it out again.
An explanation.
Links to SHA256 algorithm implementations.
User Accounts w/ Hashing Code Examples.

This implimentation gives you access to 128, 192 and 265 bit versions and ECB, CBC, CFB, OFB modes and so is more flexible.

lebalusch, on 29 June 2014 - 06:11 PM said:

Hi not really following where I am going wrong. So i download your file and store it as AES.

Spoiler

os.loadAPI("AES")
key = "TheKey"
original = "My message Goes here"


E = AES.encrypt( key, original)
D = AES.decrypt( key, E)

–encrypt
print("original: ", original)
print("key: ",key)
print("encrypted: ", E)
print("then back decrypted: ", D)

–decrypt last message This was the last out put of code from above when previously run.
key = "TheKey"
AEScode = "??~ ??? ;?@Ve???;???2?M??????9??"

A = AES.decrypt(key, AEScode)
print("and back: ", A)

print("END")

How do I decrypt the text at a later date? I know the key "TheKey"

os.loadAPI("AES")
local enc = AES.encrypt("MyKey", "My Message")
print(AES.decrypt("MyKey", enc))

SquidDev, on 29 June 2014 - 09:04 PM said:

lebalusch, on 29 June 2014 - 06:11 PM said:

Hi not really following where I am going wrong. So i download your file and store it as AES.

Spoiler

os.loadAPI("AES")
key = "TheKey"
original = "My message Goes here"


E = AES.encrypt( key, original)
D = AES.decrypt( key, E)

–encrypt
print("original: ", original)
print("key: ",key)
print("encrypted: ", E)
print("then back decrypted: ", D)

–decrypt last message This was the last out put of code from above when previously run.
key = "TheKey"
AEScode = "??~ ??? ;?@Ve???;???2?M??????9??"

A = AES.decrypt(key, AEScode)
print("and back: ", A)

print("END")

How do I decrypt the text at a later date? I know the key "TheKey"

os.loadAPI("AES")
local enc = AES.encrypt("MyKey", "My Message")
print(AES.decrypt("MyKey", enc))

This is the basic way of doing it. If you want to save/load the encrypted data to/from a file you will have to use binary mode as normal files don't support characters > 127.

os.loadAPI("AES")
key = "TheKey"
AEScode = "??~ ??? ;?@Ve???;???2?M??????9??"
A = AES.decrypt(key, AEScode)
print("and back: ", A)

theoriginalbit, on 30 June 2014 - 01:52 AM said:

if you've manually typed that string based off what the terminal has shown, then you've typed it wrong, any non-displaying character in ComputerCraft is drawn with a '?'

theoriginalbit, on 01 July 2014 - 06:32 PM said:

using this API definitely not lots of coding. however if you plan on using this for the server/client architecture you discussed in the PM with me, then sadly you'll quickly find a LuaJ bug with strings that will bring this idea to a grinding halt.

Anavrins, on 02 July 2014 - 07:51 AM said:

Or you could use tables to store all the bytes of a string…

Spoiler

function stringToByteArray(sString)
if type(sString) ~= "string" then error("bad argument #1: string expected, got "..type(sString), 2) end
local byteArray = {}
for i = 1, #sString do
  byteArray[i] = sString:sub(i,i):byte()
end
return byteArray
end

function byteArrayToString(byteArray)
if type(byteArray) ~= "table" then error("bad argument #1: table expected, got "..type(byteArray), 2) end
local s = {}
for i = 1, #byteArray do
  s[i] = string.char(byteArray[i])
end
return table.concat(s)
end

lebalusch, on 02 July 2014 - 04:29 PM said:

do you also have a link so i can read about this lua j bug please.

Rougeminner, on 29 November 2014 - 05:59 AM said:

i am having trouble with decrypting a rednet message. i thought that maybe if i encrypted the message before i sent it an provided the receiver the proper key it would be able to decrypt arg2 back into humanly readable characters that make sense. where was i wrong with this

Rougeminner, on 29 November 2014 - 06:57 PM said:

i get a java election thrown error. is it because i am encoding a string

Rougeminner, on 29 November 2014 - 06:57 PM said:

if i provide the code can you tell me what i am doing wrong after i implemented base64

Rougeminner, on 29 November 2014 - 06:57 PM said:

right now i have transmit code

input2 = Base64.encode(input2)
input2 = AES.encrypt("XXXX",input2)
redness.broadcast(input2,channel)

and receive code is

if event == "rednet_message" then
arg2 = AES.decrypt(arg2)
print(arg1,',',arg2)

input2 = base64.encode( AES.encrypt( "XXX", input2 ) )
rednet.broadcast( input2 )

if event == "rednet_message" then
  arg2 = AES.decrypt( base64.decrypte( arg2 ) ) 
  print(arg1,',',arg2)

KingofGamesYami, on 29 November 2014 - 07:23 PM said:

Rougeminner, on 29 November 2014 - 06:57 PM said:

i get a java election thrown error. is it because i am encoding a string

This is meant to encode strings, so no

Rougeminner, on 29 November 2014 - 06:57 PM said:

if i provide the code can you tell me what i am doing wrong after i implemented base64

Yes

Rougeminner, on 29 November 2014 - 06:57 PM said:

right now i have transmit code input2 = Base64.encode(input2) input2 = AES.encrypt("XXXX",input2) redness.broadcast(input2,channel) and receive code is if event == "rednet_message" then arg2 = AES.decrypt(arg2) print(arg1,',',arg2)

Well, considering you never decrypted from base64, that would never work. Also, since you encrypted in base64 before encrypting with AES, it won't protect against event corruption.

 input2 = base64.encode( AES.encrypt( "XXX", input2 ) ) rednet.broadcast( input2 ) 

 if event == "rednet_message" then arg2 = AES.decrypt( base64.decrypte( arg2 ) ) print(arg1,',',arg2) 

os.loadAPI("apps/aes/framework/AES")
os.loadAPI('Base64')
print("please enter encryption key/salt")
key = read("*")
print("please enter protocol")
input3 = read()
rednet.host("rougeminner",input3)
term.setCursorPos(1,1)
term.clear()
string1 = "Rougeminner Has left this chat "--id was ",os.getComputerID()
rednet.open("left")
rednet.broadcast("Rougeminner has joined the Chat")
running = true
while running do
event,arg1,arg2,arg3 = os.pullEventRaw()
if event == "mouse_click" then
if arg1 == 1 and arg2 == 1 and arg3 == 1 then
running = false
rednet.broadcast(string1)--,os.getComputerID())
else
end
elseif event == "key" then
--print(arg1)
if arg1 == 29 then
rednet.broadcast(string1)
term.setCursorPos(1,1)
term.clear()
running = false
end
elseif event == "rednet_message" then
arg2 = Base64.decode(AES.decrypt(key,arg2))
print('ID: ',arg1," message ",arg2)
elseif arg2 == nil then
--print("please enter ID")input1 = read()
--term.setCursorPos(1,17)
--term.setCursorPos(1,10)
print("Enter Message")input2 = read()
--print("please Enter Protocol") input3 = read()
--h = tonumber(input3)
--rednet.broadcast(input2,"TCP1")--input3)
--if input2:sub(1,1) == "/" then
--print("Commands are: /List , /leave , /clear")
if input2 == "/clear" then
term.clear()
term.setCursorPos(1,1)
elseif input2 == "/help" then
print("commands are /help , /clear , and you can press left control to leave along with clicking a cords X1,Y1")
elseif input2 == "/List" or input2 == "/list" then
list = rednet.lookup(input3)
print(list)
--rednet.lookup(input3))
--elseif input2 == "/msg" then
--print("Enter ID")input1 = read()
--input1 = 18--"hi there"
--num = tonumber(input1)
--print("Enter Message") input2 = read()
--print(input1)
--rednet.send(input1,input2,input3)
--end
--elseif input2 == "/leave" then
--input3 = read()
--rednet.broadcast(string1)
--rednet.host("rougeminner's cell",input3)
--elseif input2 == not(nil) then
--rednet.broadcast(input2,input3)
--print("<ME>:",input2)
else
rednet.broadcast(input2,input3)
input2 = Base64.encode(AES.encrypt(key,input2))
print("<ME>:",input2)
end
else
end
end

Rougeminner, on 30 November 2014 - 01:16 AM said:

what do you mean event corruption. i still get a java exception thrown error. Almost forgot heres my code

Base64.decode(AES.decrypt(key,arg2))

AES.decrypt(key, Base64.decode(arg2)) -- These should be swapped around

os.loadAPI("AES")
os.loadAPI("Base64")

password = "1235"

-- plug monitor
local monitor = peripheral.find("monitor", function(name, object) object.side = name return true end)

-- plug modem
local modem = peripheral.find( "modem", function( name, obj ) return obj.isWireless() end)

msg = "Hello world !"
msg = AES.encrypt(password, msg)
msg = Base64.encode(msg)
           
modem.transmit(3, 1, msg)

os.loadAPI("AES")
os.loadAPI("Base64")

password = "1235"

-- plug monitor
local monitor = peripheral.find("monitor", function(name, object) object.side = name return true end)

-- plug modem
local modem = peripheral.find( "modem", function( name, obj ) return obj.isWireless() end)

while true do
  modem.open(3)
  local event, modemSide, senderChannel,
  replyChannel, msg, senderDistance = os.pullEvent("modem_message")

  msg = Base64.decode(msg)
  msg = AES.decrypt(password, msg)
  monitor.write(msg)

  modem.closeAll()
end

Rokin05, on 01 January 2015 - 05:14 PM said:

-snip-

-- CLIENT
-- plug monitor
local monitor = peripheral.find("monitor", function(name, object) object.side = name return true end)
-- plug modem
local modem = peripheral.find( "modem", function( name, obj ) return obj.isWireless() end)

local password = "1234"

os.loadAPI("system/api/AES")
os.loadAPI("system/api/base64")

while true do
  write("send : ")
  msg= read()
  msg = AES.encrypt(password, msg)
  msg = base64.encode(msg)
		  
  modem.transmit(3, 1, msg)
end

-- SERVER1
-- plug monitor
local monitor = peripheral.find("monitor", function(name, object) object.side = name return true end)
-- plug modem
local modem = peripheral.find( "modem", function( name, obj ) return obj.isWireless() end)

local password = "imabadpwd"

os.loadAPI("system/api/AES")
os.loadAPI("system/api/base64")

function newLine()
  local _,cY= monitor.getCursorPos()
  monitor.setCursorPos(1,cY+1)
end

function monclear()
  monitor.clear()
  monitor.setCursorPos(1,1)
end

while true do
  modem.open(3)
 
  local event, modemSide, senderChannel,
  replyChannel, msg, senderDistance = os.pullEventRaw("modem_message")
  monclear()
  monitor.write("Base64: "..msg)
  msg = base64.decode(msg)
 
  newLine()
  monitor.write("AES: "..msg)
  msg = AES.decrypt(password, msg)
 
  newLine()
  if msg == nil then msg = "error" end
 
  monitor.write("MSG : "..msg)
  modem.closeAll()
end

msg = AES.decrypt(password, msg)
[color=#FF0000]monitor.write("MSG : "..msg) -- error ([/color][color=#FF0000]msg = nil)[/color]

msg = AES.decrypt(password, msg)
[color=#008000]if msg == nil then msg = "decrypt error (bad pwd)" end[/color]



monitor.write("MSG : "..msg)

Phaneron, on 11 August 2015 - 05:24 AM said:

I've tried to load and use the program, but I keep running into odd errors. Could anybody illuminate me as to what I am doing wrong? ComputerCraft 1.73

TheOddByte, on 12 September 2015 - 11:25 PM said:

Hey, just checking here too see if you've updated this for the latest version of CC, if I remember correctly it wasn't working too well with the changes made to the bit API or something right?

SquidDev, on 15 September 2015 - 01:00 PM said:

TheOddByte, on 12 September 2015 - 11:25 PM said:

Hey, just checking here too see if you've updated this for the latest version of CC, if I remember correctly it wasn't working too well with the changes made to the bit API or something right?

Ahhh, no. What I'll do for the time being is roll back to the old bit API I was using, which is slower but works with CC 1.74, and then try to bugfix. Sorry.

SquidDev, on 15 September 2015 - 04:49 PM said:

- snip -

TrumpetMiner, on 14 December 2015 - 10:48 PM said:

When I send an encrypted message to another computer it cannot decrypt. Am I doing something wrong?

SquidDev, on 15 December 2015 - 01:10 PM said:

TrumpetMiner, on 14 December 2015 - 10:48 PM said:

When I send an encrypted message to another computer it cannot decrypt. Am I doing something wrong?

You'll have to encode the string in some way - CC cannot send binary data across modems. The easiest way to do it would be to encode it in base64 before sending, and decode before decrypting it.

KingofGamesYami, on 16 December 2015 - 11:54 PM said:

I use this. (Or at least, most of that. I don't use the command line part)

• Allow passing the IV through the main API. I'd recommend this for additional security
• Add CTR mode. Almost 2 years after Anavrins asked for it. Sorry :(/>.
• 143 unit tests! All the NIST test vectors pass.

wget https://git.io/aeslua aeslua

pastebin run xLRDQj9t https://git.io/aeslua aeslua

randomdude999, on 22 May 2016 - 09:40 AM said:

-snip-

Restioson, on 14 June 2016 - 08:05 AM said:

Unfortunately, with the latest release by default one cannot connect to GitHub anymore :wacko:/> Please upload it to pastebin.

S:http_whitelist=pastebin.com;computercraft.info

S:http_whitelist=*

LoganDark, on 14 June 2016 - 08:18 AM said:

If you haven't noticed this is not a one-way hash. If you're using it for storing passwords or something that should not be decrypted this is not the system for you. Something that is encrypted can be decrypted by brute force. I recommend a one-way hash function such as SHA256 or PBDKF2 (I got the name right !).

assert(password ~= nil, "Empty Data")

assert(data ~= nil, "Empty Data")