Adds random salt to user passwords (#7410).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4936 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20110223180953_salt_user_passwords.rb

@@ -0,0 +1,13 @@
+class SaltUserPasswords < ActiveRecord::Migration
+  
+  def self.up
+    say_with_time "Salting user passwords, this may take some time..." do
+      User.salt_unsalted_passwords!
+    end
+  end
+
+  def self.down
+    # Unsalted passwords can not be restored
+    raise ActiveRecord::IrreversibleMigration, "Can't decypher salted passwords. This migration can not be rollback'ed."
+  end
+end