Class: Underlock::FileEncryptor

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

Instance Method Summary collapse

Instance Method Details

#decrypt(encrypted_entity) ⇒ Object 



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# File 'lib/underlock/file_encryptor.rb', line 30

def decrypt(encrypted_entity)
  decode_cipher = Underlock::Base.config.cipher.dup
  decode_cipher.decrypt
  decode_cipher.key = private_decrypt(encrypted_entity.key)
  decode_cipher.iv = private_decrypt(encrypted_entity.iv)

  @base_dir, @filename = File.split(encrypted_entity.encrypted_file)

  File.open(decrypted_filepath, 'wb') do |decrypted_file|
    File.open(encrypted_entity.encrypted_file, 'rb') do |inf|
      loop do
        r = inf.read(4096)
        break unless r
        decrypted_file << decode_cipher.update(r)
      end
    end
  end
  File.new(decrypted_filepath)
end

#encrypt(file) ⇒ Object 



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# File 'lib/underlock/file_encryptor.rb', line 4

def encrypt(file)
  file = File.realpath(file)
  @base_dir, @filename = File.split(file)
  cipher = Underlock::Base.config.cipher.dup
  cipher.encrypt
  key = cipher.random_key
  iv  = cipher.random_iv

  File.open(encrypted_filepath, "wb") do |encrypted_file|
    File.open(file, 'rb') do |inf|
      loop do
        r = inf.read(4096)
        break unless r
        encrypted_file << cipher.update(r)
      end
    end
    encrypted_file << cipher.final
  end

  encrypted_file = File.new(encrypted_filepath)
  encrypted_key  = public_encrypt(key)
  encrypted_iv   = public_encrypt(iv)

  EncryptedEntity.new(encrypted_file: encrypted_file, key: encrypted_key, iv: encrypted_iv)
end