Rails: Access to current_user from within a model in Ruby on Rails
I need to implement fine-grained access control in a Ruby on Rails app. The permissions for individual users are saved in a database table and I thought that it would be best to let the respective resource (i.e. the instance of a model) decide whether a certain user is allowed to read from or write to it. Making this decision in the controller each time certainly wouldn’t be very DRY. The problem
Is devise's token_authenticatable secure?
token_authenticatable is vulnerable to timing attacks, which are very well explained in this blog post. These attacks were the reason token_authenticatable was removed from Devise 3.1. See the plataformatec blog post for more info. To have the most secure token authentication mechanism, the token: Must be sent via HTTPS. Must be random, of cryptographic strength. Must be securely compared. Must no
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