Rails Generates Credentials.yml.enc But Not Master.key

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For developers we do not need to do any changes in source code of the app only in our deployment pipe line we adding secrets.yml.enc who overrides defaults to final secrets per environments. Environment: Development / Test. Only plain rails secrets.yml with possibility to re-configure rails secrets via ENV for unit tests. Ruby on Rails. Contribute to rails/rails development by creating an account on GitHub. May 21, 2019  The encrypted version of the credentials file is in config/credentials.yml.enc and the corresponding master key in config/master.key. The later is a. Rails 5.2 credentials.yaml.enc and master.key not working on Heroku. Ask Question Asked 1 year, 7 months ago. Active 1 year, 4 months ago. Viewed 2k times 2. I'm setting up active storage for a new app, and haven't been able to get the app running on production after setting up my amazon credentials. Fixing the key name in config.

If your master.key has been compromised, you might want to regenerate it.

  • Generate config/master.key for Rails Encrypted Credentials by editing credentials. Bin/rails credentials:edit # generates credentials.yml.enc Adding Postgres Database. Add the postgres production database password to credentials.yml.enc. ## credentials.ymc.enc database: productionpassword.
  • May 24, 2018  These credentials are stored in credentials.yml.enc while the key to decrypt the file is stored within master.key file. These two files are automatically generated when you created a new Rails project. Tip: It is very important that you do not lose master.key file. It is not and should not.

No key regeneration feature at the moment.We have to do it manually.

  1. Copy content of original credentials rails credentials:show somewhere temporarily.
  2. Remove config/master.key and config/credentials.yml.enc
  3. Run EDITOR=vim rails credentials:edit in the terminal: This command will create a new master.key and credentials.yml.enc if they do not exist.
  4. Paste the original credentials you copied (step 1) in the new credentials file (and save + quit vim)
  5. Add and Commit the file config/credentials.yml.enc

Rails Generates Credentials.yml.enc But Not Master.key Time

Important

  • Make sure config/master.key is listed in .gitignore and NOT tracked by git.
  • The command EDITOR=vim rails credentials:edit might not work if you require credential value in some file (initializers or database.yml).I had the problem with devise.rb. I just uncommented the line secret_key = .. just the time to run the command to regenerate the credentials file, and then commented the line out again.
  • If you want to use Sublime to edit the credentials, you can replace the command EDITOR=vim rails credentials:edit by EDITOR='/Applications/Sublime Text.app/Contents/SharedSupport/bin/subl -w' rails credentials:edit

source: https://blog.eq8.eu/til/rails-52-credentials-tricks.html

Article Categories:#Code,#Back-end Engineering

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Keeping your credentials safe as a developer is extremely important. You don’t want to commit any sensitive information, like passwords or API keys, to your remote git repository as it can allow malicious users to access the services you are using.

The Good Ol’ Days

Since version 4.1, Rails has helped developers store their secrets by generating a new secrets.yml file in the config folder. By default, this file contains a SECRET_KEY_BASE that is used to “derive keys for encrypted cookies… [and] HMAC signed cookies.”[1] However, you could add additional keys to this file:

Once everything is saved, you could access it via Rails.application.secrets.secret_api_key. This way, you could store your secret credentials in a single file and simply make sure that secrets.yml is part of your .gitignore.

The release of Rails 5.1 added another file named secrets.yml.enc to allow for encrypting your secret credentials, but this caused some confusion. The combination of config/secrets.yml, config/secrets.yml.enc, and SECRET_KEY_BASE made it so it wasn’t clear where secrets should be stored and what the relevance of SECRET_KEY_BASE was [2] .

A New Beginning

With this confusion in mind, Rails released version 5.2 and created an entirely new way to store your secret credentials that I will walk you through.

First, make sure you install the newest version of Rails by running:

This ensures that the Rails Gem you install is the most up to date (you can find the most recent release of Rails on the official RubyGems page[3]). After doing so, when you create a new Rails project, you should see two files in your config folder:

  • credentials.yml.enc is an encrypted file that will contain all your secret credentials. Your private API keys and passwords will all be stored in this file, all encrypted. Since this file is encrypted, it is safe to push this to a remote git repository or a server.
  • master.key is a file containing your encryption key. Without this file or if it is modified, Rails will not be able to read your credentials stored in credentials.yml.enc. This file should NOT be pushed to a git repo or any server as it can be used to decrypt credentials.yml.enc and someone can steal sensitive information.

You must be wondering, how do I add my secret credentials to credentials.yml.enc if it is encrypted? Well, you need to go into your command line interface and run:

Without the --wait flag, your credentials.yml.enc will be saved immediately without giving you the chance to edit. Also, you can replace “subl” with the command line shortcut to whatever your favorite text-editor is (in this case, the command above will open credentials.yml.enc in Sublime since I’ve made the shortcut available). Now, you can edit and store new credentials in YAML format, save the file, and Rails will automatically re-encrypt credentials.yml.enc for you. You can access these secret credentials at any point in your application by using:

Rails Generates Credentials.yml.enc But Not Master.key Download

And you’re good to go! If you do not want to redefine your EDITOR everytime you want to edit your credentials, simply add to your shell profile:

Now, all you need to do to edit your credentials is run:

Heroku and other Deployment Strategies

If you’re deploying your app to Heroku, the encryption key from master.key is stored in an entirely different way. Heroku allows you to add special configuration variables in the Settings tab of your app’s dashboard. There, you can add a new config variable called RAILS_MASTER_KEY and paste the encryption key into the space provided. Once saved, the Rails application is smart enough to detect that the master key is stored as a config variable to decrypt your secret credentials.

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The underlying technology of this method is that Heroku is setting an environment variable that Rails can access via ENV[“RAILS_MASTER_KEY”]. Therefore, to store your master key on other remote servers, you just have to save the encryption key as an environment variable.

Collaboration

What if you need to share your master.key with other developers working on your team or project? Simply sending a message containing the special key over spaces like Slack isn’t safe and ultimately isn’t good practice. That’s why password management is a giant field of its own and there are a multitude of ways to securely share your credentials with trusted people. Two services I personally use are 1Password and OneTimeSecret.

Rails Generates Credentials.yml.enc But Not Master.key 2

1Password is a secure password manager that allows users to store any kind of credentials: passwords, API keys, software licenses, etc. In fact, 1Password allows organizations to get in on it so team members can securely share a pool of sensitive information amongst everyone on their team.

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OneTimeSecret is more for quickly sharing credentials with your team and less for long-term storage like 1Password. You can generate a secret link, password-protected or not, that will contain the sensitive information once opened. However, there’s a catch! Once you open the link for the first time, you should store the given information somewhere more secure as you cannot open the link ever again. Also, the secret-holder can set an expiry time on the link so you have a certain timeframe to retrieve the secret information and store it in another location.

Now, you know how to safely store credentials and reduce the risk of unauthorized access!

References:

  • [1]: https://medium.com/@michaeljcoyne/understanding-the-secret-key-base-in-ruby-on-rails-ce2f6f9968a1
  • [2]: https://github.com/rails/rails/issues/30006
  • [3]: https://rubygems.org/gems/rails