RoCrypt

Description

A pure-Lua (5.1) cryptography module supporting:

• Cryptographic hash functions (CHF)
  • MD2, MD4, MD5
  • RIPEMD-128, RIPEMD-160
  • SHA1, SHA-224, SHA-256, SHA-384, SHA-512
  • SHA3-224, SHA3-256, SHA3-384, SHA3-512
  • SHAKE128, SHAKE256
• Cyclic redundancy checks (CRC) algorithms
  • CRC32
• Binary-to-hex encoding algorithms
  • Base64, Base91
• Asymmetric algorithms
  • RSA
• Symmetric algorithms
  • AES
  • DES, Triple DES
• Shared-secret algorithms
  • HMAC
• Compression algorithms
  • LZ4, ZLIB, Deflate
• UID (unique identifier) algorithms
  • Snowflake, Sqids

Credit

• RobloxGamerPro200007 - RSA function
• Egor-Skriptunoff - Creating the original SHA-2 & Keccak (SHA-3) backbones

Usage

• SHA256

local RoCrypt = require(script.RoCrypt)
local hash = RoCrypt.sha256("Hello, World!")

• RSA

local RoCrypt = require(script.RoCrypt)
local RSA = RoCrypt.rsa()
n, e, d = RSA.newKeys()
encrypted = RSA.crypt(n, 242351, e)
decrypted = RSA.crypt(n, encrypted, d)
print(decrypted[1]) -- Expected output: 242351

• DES3

local DES3 = RoCrypt.des3()

-- define 8 byte key and plaintext
local key = "secret_k"
local plaintext = "Hello World"

-- convert strings to byte arrays
local keyBytes = {string.byte(key, 1, #key)}
local plaintextBytes = {string.byte(plaintext, 1, #plaintext)}

-- encrypt the plaintext
local ciphertextBytes = DES3.encrypt(keyBytes, plaintextBytes)

-- convert the ciphertext bytes back to a string
local ciphertext = ciphertextBytes
print("Ciphertext: ", ciphertext)

-- decrypt the ciphertext
local decryptedBytes = DES3.decrypt(keyBytes, ciphertextBytes)

-- convert the decrypted bytes back to a string
local decrypted = string.char(unpack(decryptedBytes))
print("Decrypted: " .. decrypted)

• Sqids

local RoCrypt = require(script.Parent.Script.RoCrypt)

local sqids = RoCrypt.sqids().new() --> function
local encoded = sqids:encode(1, 2, 3, 4) --> string: v2fWhzi1
local decoded = sqids:decode(encoded) --> table: {1, 2, 3, 4}