Class: ActiveSupport::CachingKeyGenerator

Inherits:
Object
  • Object
show all
Defined in:
activesupport/lib/active_support/key_generator.rb

Overview

CachingKeyGenerator is a wrapper around KeyGenerator which allows users to avoid re-executing the key generation process when it’s called using the same salt and key_size

Instance Method Summary collapse

Constructor Details

#initialize(key_generator) ⇒ CachingKeyGenerator

Returns a new instance of CachingKeyGenerator.



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# File 'activesupport/lib/active_support/key_generator.rb', line 29

def initialize(key_generator)
  @key_generator = key_generator
  @cache_keys = ThreadSafe::Cache.new
end

Instance Method Details

#generate_key(salt, key_size = 64) ⇒ Object

Returns a derived key suitable for use. The default key_size is chosen to be compatible with the default settings of ActiveSupport::MessageVerifier. i.e. OpenSSL::Digest::SHA1#block_length



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# File 'activesupport/lib/active_support/key_generator.rb', line 37

def generate_key(salt, key_size=64)
  @cache_keys["#{salt}#{key_size}"] ||= @key_generator.generate_key(salt, key_size)
end