method

secure_compare

v3.0.9 - Show latest stable - 0 notes - Class: ActiveSupport::MessageVerifier

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What's this?

secure_compare(a, b) private

constant-time comparison algorithm to prevent timing attacks

# File activesupport/lib/active_support/message_verifier.rb, line 47
      def secure_compare(a, b)
        return false unless a.bytesize == b.bytesize

        l = a.unpack "C#{a.bytesize}"

        res = 0
        b.each_byte { |byte| res |= byte ^ l.shift }
        res == 0
      end

secure_compare

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