Module: Pod4::Encrypting::InstanceMethods

Defined in:
lib/pod4/encrypting.rb

Instance Method Summary collapse

Instance Method Details

#encryption_iv ⇒ Object

The value of the IV field (whatever it is) _as currently stored on the model_



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# File 'lib/pod4/encrypting.rb', line 176

def encryption_iv
  return nil unless use_iv?
  instance_variable_get( "@#{self.class.encryption_iv_column}".to_sym )
end

#map_to_interface ⇒ Object

When mapping to the interface, encrypt the encryptable columns from the model



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# File 'lib/pod4/encrypting.rb', line 134

def map_to_interface
  hash   = super.to_h
  cipher = get_cipher(:encrypt)

  # If the IV is not set we need to set it both in the model object AND the hash, since we've
  # already obtained the hash from the model object.
  if use_iv? && encryption_iv.nil?
    iv = cipher.random_iv
    set_encryption_iv(iv)
    hash[self.class.encryption_iv_column] = Base64.strict_encode64(iv)
  end

  self.class.encryption_columns.each do |col|
    hash[col] = crypt(cipher, :encrypt, encryption_iv, hash[col])
  end

  Octothorpe.new(hash)
end

#map_to_model(ot) ⇒ Object

When mapping to the model, decrypt the encrypted columns from the interface



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# File 'lib/pod4/encrypting.rb', line 156

def map_to_model(ot)
  hash   = ot.to_h
  cipher = get_cipher(:decrypt)

  # The IV is not in columns, we need to de-base-64 it and set it on the model ourselves
  if use_iv?
    iv = Base64.strict_decode64 hash[self.class.encryption_iv_column]
    set_encryption_iv(iv)
  end

  self.class.encryption_columns.each do |col|
    hash[col] = crypt(cipher, :decrypt, encryption_iv, hash[col])
  end

  super Octothorpe.new(hash)
end