51 lines
1.3 KiB
Ruby
51 lines
1.3 KiB
Ruby
class ZxcvbnService
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@tester_mutex = Mutex.new
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class << self
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# Returns an Zxcvbn instance cached between classes instances and between threads.
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#
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# The tester weights ~20 Mo, and we'd like to save some memory – so rather
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# that storing it in a per-thread accessor, we prefer to use a mutex
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# to cache it between threads.
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def tester
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@tester_mutex.synchronize do
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@tester ||= build_tester
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end
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end
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private
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# Returns a fully initializer tester from the on-disk dictionary.
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#
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# This is slow: loading and parsing the dictionary may take around 1s.
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def build_tester
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dictionaries = YAML.safe_load(Rails.root.join("config", "initializers", "zxcvbn_dictionnaries.yaml").read)
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tester = Zxcvbn::Tester.new
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tester.add_word_lists(dictionaries)
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tester
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end
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end
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def initialize(password)
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@password = password
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end
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def complexity
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wxcvbn = compute_zxcvbn
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score = wxcvbn.score
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length = @password.blank? ? 0 : @password.length
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vulnerabilities = wxcvbn.match_sequence.map { |m| m.matched_word.nil? ? m.token : m.matched_word }.filter { |s| s.length > 2 }.join(', ')
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[score, vulnerabilities, length]
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end
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def score
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compute_zxcvbn.score
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end
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private
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def compute_zxcvbn
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self.class.tester.test(@password)
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end
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end
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