module AttrEncryption::InstanceMethods

Public Instance Methods

decrypt(attribute, encrypted_value) click to toggle source

Decrypts a value for the attribute specified using options evaluated in the current object's scope

Example

class User
  attr_accessor :secret_key
  attr_encrypted :email, :key => :secret_key

  def initialize(secret_key)
    self.secret_key = secret_key
  end
end

@user = User.new('some-secret-key')
@user.decrypt(:email, 'SOME_ENCRYPTED_EMAIL_STRING')
# File lib/attr_encryption.rb, line 298
def decrypt(attribute, encrypted_value)
  self.class.decrypt(attribute, encrypted_value, evaluated_attr_encrypted_options_for(attribute))
end
encrypt(attribute, value) click to toggle source

Encrypts a value for the attribute specified using options evaluated in the current object's scope

Example

class User
  attr_accessor :secret_key
  attr_encrypted :email, :key => :secret_key

  def initialize(secret_key)
    self.secret_key = secret_key
  end
end

@user = User.new('some-secret-key')
@user.encrypt(:email, 'test@example.com')
# File lib/attr_encryption.rb, line 317
def encrypt(attribute, value)
  self.class.encrypt(attribute, value, evaluated_attr_encrypted_options_for(attribute))
end
unencrypted_attributes() click to toggle source
# File lib/attr_encryption.rb, line 321
def unencrypted_attributes
  attributes.each_with_object({}) do |a, new_hash|
    key = a.first
    value = a.last
    if key =~ /\A(.+)_enc\z/
      key = $1
      value = decrypt(key.to_sym, value)
    end
    new_hash[key] = value
  end   
end

Protected Instance Methods

evaluate_attr_encrypted_option(option) click to toggle source

Evaluates symbol (method reference) or proc (responds to call) options

If the option is not a symbol or proc then the original option is returned

# File lib/attr_encryption.rb, line 343
def evaluate_attr_encrypted_option(option)
  if option.is_a?(Symbol) && respond_to?(option)
    send(option)
  elsif option.respond_to?(:call)
    option.call(self)
  else
    option
  end
end
evaluated_attr_encrypted_options_for(attribute) click to toggle source

Returns attr_encrypted options evaluated in the current object's scope for the attribute specified

# File lib/attr_encryption.rb, line 336
def evaluated_attr_encrypted_options_for(attribute)
  self.class.encrypted_attributes[attribute.to_sym].inject({}) { |hash, (option, value)| hash.merge!(option => (option == :preencrypt) ? value : evaluate_attr_encrypted_option(value)) }
end