guardrails Goto Github PK
Name: GuardRails
Type: Organization
Location: Charlottesville, VA
Name: GuardRails
Type: Organization
Location: Charlottesville, VA
GEM REQUIREMENTS: ----------------- - Ruby on Rails [version 2.x.x] (Rails 3 not yet supported) - ruby_parser [2.0.5+] - ruby2ruby [1.2.5+] - nokogiri [1.4.4+] and mechanize WHAT VERSIONS OF RUBY ARE SUPPORTED? ------------------------------------ Ruby 1.8 is necessary to run the ruby_parser and ruby2ruby gems and must be the version of Ruby that is used when performing transformations. That being said, GuardRails supports both Ruby 1.8 and Ruby 1.9, so once the GuardRails transformation has been performed, either Ruby 1.8.x or Ruby 1.9.x may be used to run the application. GUARDRAILS SETUP: ----------------- To initially set up GuardRails, follow these steps: 1. Install the required gems 2. Download a copy of GuardRails 3. Navigate the GuardRails package to the RawApps folder and place a working copy of your Rails application in the folder. 4. Go to RawApps/yourApp/config. Copy the template "config.gr" from the root of the GuardRails package and place them here. You will want to edit these for each application individually. 5. To test your setup, in the root of the GuardRails package, execute the "run.sh" shell script, passing in the name of the folder containing your application in the RawApps directory: ~$ ./run.sh yourApp 6. Run rake db:migrate in your new application. This will add the extra fields needed for taint tracking. This process preserves the database from the "RawApps" version in the "ProdApps" version, but note that any changes to the "ProdApps" database will be lost if the GuardRails transformation is performed again. Update: In the latest version of GuardRails, rake db:migrate only needs to be run the first time the transformation is performed. In subsequent transformations, the database in the "ProdApps" folder is preserved, rather than replaced by the one in "RawApps". If you still would like the "ProdApps" database to be replaced, run the GuardRails transformation with the "-r" flag and then re-run rake db:migrate in the "ProdApps" folder. GEM MODIFICATIONS (Improved explanation coming soon, this portion can be avoided for now): ------------------ Because string interpolation is only controlled by native Ruby code, it can potentially drop taint information. For this reason, any cases of interpolation must be removed from ruby libraries that are used in your application that may handle sensitive string information. Note that this is done for your application by default. Rails, however, must be modified to remove interpolation. Currently, this can be done with the following steps: 1. Replace the ruby2ruby.rb file in your gem library with the ruby2ruby.rb file given in the repository 2. Back up a copy of the rails gem you are using 3. Run the 'converter.rb' file Ruby 1.8 giving the directory of the actionpack gem for the version of rails you are using Note that this only removes interpolation from actionpack rails files, but this is often sufficient to secure the application. This transformation will soon be able to be applied to all of rails and arbitrary code libraries. In addition, we will soon provide pre-transformed versions of rails that can be installed simply as another version of rails and thus no rails gems will need to be modified.
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