class Lark::Cipher

Constants

CIPHER

Attributes

key[R]

Public Class Methods

new(key) click to toggle source
# File lib/lark/cipher.rb, line 10
def initialize(key)
  @key = Digest::SHA256.digest(key)
end

Public Instance Methods

decrypt(message) click to toggle source
# File lib/lark/cipher.rb, line 22
def decrypt(message)
  cipher = OpenSSL::Cipher.new(CIPHER)
  cipher.decrypt

  decode64 = Base64.urlsafe_decode64(message)
  cipher.key = key
  cipher.iv = decode64[0..15]
  ecrypted = decode64[16..-1]
  cipher.update(ecrypted) + cipher.final
end
encrypt(message) click to toggle source
# File lib/lark/cipher.rb, line 14
def encrypt(message)
  cipher = OpenSSL::Cipher.new(CIPHER)
  cipher.encrypt
  cipher.key = key
  iv = cipher.random_iv
  Base64.urlsafe_encode64(iv + cipher.update(message) + cipher.final)
end