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Mongoid::Kms

Easily encrypt your datas using AWS's KSM.

Installation

Add this line to your application's Gemfile:

gem 'mongoid-kms'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mongoid-kms

Usage

Environmental variables to include:

AWS_ACCESS_KEY_ID # an IAM access key
AWS_SECRET_ACCESS_KEY # an IAM access secret

Somewhere before your run your application, you will need to add this:

require 'mongoid/kms'

Mongoid::Kms.configure({region: "us-east-1", key: "your aws kms key id i.e <02342-234-232-234-234>"})

When defining your classes, include Mongoid::Kms, and use the secure_field to define your fields. The :context argument is an optional list of method names or strings used for encrypting your values.

The context argument is an important way to ensure simply having the authentication keys and data field does not enable decryption. When using context, it also requires an attacker to know the decryption context.

class MyClass
  include Mongoid::Document
  include Mongoid::Kms

  secure_field :my_secure_field, type: String, context: [:unsecure_field, "some-string"]
  field :unsecure_field
end

Development and Testing

In development or testing, just require mongoid/kms/mock and the package will use Rot13 for encryption.

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