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Class: ActiveSupport::CachingKeyGenerator

Relationships & Source Files
Inherits: Object
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

Class Method Summary

Instance Method Summary

Constructor Details

.new(key_generator) ⇒ CachingKeyGenerator

[ GitHub ] 

  


# 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)  
  



  

    

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


  



  [ GitHub ]


  

  


# 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