add a class method so you can encrypt passwords from fixtures

lib/devise/models/database_authenticatable.rb

@@ -2,6 +2,11 @@ require 'devise/strategies/database_authenticatable'
 require 'bcrypt'
 
 module Devise
+  # Digests the password using bcrypt.
+  def self.bcrypt(klass, password)
+    ::BCrypt::Password.create("#{password}#{klass.pepper}", :cost => klass.stretches).to_s
+  end
+
   module Models
     # Authenticatable Module, responsible for encrypting password and validating
     # authenticity of a user while signing in.
@@ -34,7 +39,7 @@ module Devise
       # Generates password encryption based on the given value.
       def password=(new_password)
         @password = new_password
-        self.encrypted_password = password_digest(@password) if @password.present?
+        self.encrypted_password = Devise.bcrypt(self.class, @password) if @password.present?
       end
 
       # Verifies whether an password (ie from sign in) is the user password.
@@ -120,11 +125,6 @@ module Devise
 
     protected
 
-      # Digests the password using bcrypt.
-      def password_digest(password)
-        ::BCrypt::Password.create("#{password}#{self.class.pepper}", :cost => self.class.stretches).to_s
-      end
-
       module ClassMethods
         Devise::Models.config(self, :pepper, :stretches)
 

test/devise_test.rb

@@ -11,6 +11,16 @@ module Devise
 end
 
 class DeviseTest < ActiveSupport::TestCase
+  test 'bcrypt on the class' do
+    password = "super secret"
+    klass    = Struct.new(:pepper, :stretches).new("blahblah", 2)
+    hash     = Devise.bcrypt(klass, password)
+    assert_equal hash, Devise.bcrypt(klass, password)
+
+    klass    = Struct.new(:pepper, :stretches).new("bla", 2)
+    assert_not_equal hash, Devise.bcrypt(klass, password)
+  end
+
   test 'model options can be configured through Devise' do
     swap Devise, :allow_unconfirmed_access_for => 113, :pepper => "foo" do
       assert_equal 113, Devise.allow_unconfirmed_access_for