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mheyder/cookies_rotation.rb

Last active January 11, 2019 09:29
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Rotate Rails 5.2 encrypted cookies key
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cookies_rotation.rb
Rails.application.config.action_dispatch.cookies_rotations.tap do |cookies|
salt = 'authenticated encrypted cookie'
encrypted_cookie_cipher = 'aes-256-gcm'
key_generator = ActiveSupport::KeyGenerator.new(ENV['OLD_SECRET_KEY_BASE'], iterations: 1000)
key_len = ActiveSupport::MessageEncryptor.key_len(encrypted_cookie_cipher)
secret = key_generator.generate_key(salt, key_len)
cookies.rotate :encrypted, secret
end
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