Class: TinggEncryption::Encryption

Inherits:
Object
  • Object
show all
Defined in:
lib/tinggEncryption.rb

Instance Method Summary collapse

Constructor Details

#initialize(secret_key, iv_key) ⇒ Encryption

Returns a new instance of Encryption.



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# File 'lib/tinggEncryption.rb', line 14

def initialize(secret_key, iv_key)
  if secret_key.nil? || (secret_key.size != 32) \
    && iv_key.nil? || iv_key.nil? || iv_key.size != 16
    raise 'Key Error'
  end

  @algorithm = 'AES-256-CBC'
  # Create a encoded key and secret
  # We could also have just created a random key

  @secret_key = Digest::SHA2.hexdigest(secret_key)[0..31]
  # By default data is padded to the nearest 16 bytes block.  To turn
  # this off, you may use the :padding => false (or nil) option.
  #
  # In this mode however, the caller is required to pad the data.  In
  # the following example the message is exactly 16 bytes long, so no
  # error aries.
  @iv_key = Digest::SHA2.hexdigest(iv_key)[0..15]
end

Instance Method Details

#encrypt(data) ⇒ Object 



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# File 'lib/tinggEncryption.rb', line 34

def encrypt(data)
  key = @secret_key
  iv_key = @iv_key
  # @type
  raise 'Key Error' if key.nil? && iv_key.nil?

  # encryption_type
  encryption = OpenSSL::Cipher.new(@algorithm)
  encryption.encrypt
  encryption.key = key
  encryption.iv = iv_key
  cypher = encryption.update(JSON(data))
  cypher << encryption.final

  Base64.encode64(Base64.encode64(cypher))
end