EncryptedField

Provides an encrypted field for use in an Ecto schema.

Usage

First, configure an encryption key. An easy way to do this is with pwgen (brew install pwgen):

brew install pwgen
pwgen -1 32

You can configure this key at runtime using a {:system, "key"} tuple:

config :encrypted_field, :key, {:system, "ENCRYPTED_FIELD_KEY"}

Then, use it in an Elixir schema:

defmodule MyApp.User do
  use Ecto.Schema

  schema "users" do
    field :token, EncryptedField
  end
end

When this value is written to the database, it will be encrypted with your secret key using AES in CTR mode, and Base64-encoded. At runtime, the value will be decrypted.

Installation

The package can be installed by adding encrypted_field to your list of dependencies in mix.exs:

def deps do
  [
    {:encrypted_field, "~> 0.1.0"}
  ]
end

Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/encrypted_field.