Unencryption for video links on twist.moe

twist.moe.cr

require "openssl"

data = ""

KEY = "LXgIVP&PorO68Rq7dTx8N^lP!Fa5sGJ^*XK"
cipher = OpenSSL::Cipher.new("aes-256-cbc")
encrypted = Base64.decode_string(data)

salt = encrypted.to_slice[8, 8]
my_data = KEY + String.new(salt)

final_key = key = String.build { |str| str.write(OpenSSL::MD5.hash(my_data).to_slice) }

while final_key.to_slice.size < 48
  key = String.build { |str| str.write(OpenSSL::MD5.hash(key + my_data).to_slice) }
  final_key += key
end

cipher.key = String.new(final_key.to_slice[0...32])
cipher.iv = String.new(final_key.to_slice[32...48])
cipher.decrypt
final = String.build do |str|
  str.write(cipher.update(encrypted.to_slice[16..]))
  str.write(cipher.final)
end
p final