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30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
57 lines
1.6 KiB
Ruby
57 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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# CommonPasswords will check a given password against a list of the most commonly used passwords.
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# The list comes from https://github.com/danielmiessler/SecLists/tree/master/Passwords
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# specifically the list of 10 million passwords, top 100k, filtered by length
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#
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# The list is stored in Redis at a key that is shared by all sites in a multisite config.
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#
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# If the password file is changed, you need to add a migration that deletes the list from redis
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# so it gets re-populated:
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#
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# $redis.without_namespace.del CommonPasswords::LIST_KEY
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class CommonPasswords
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PASSWORD_FILE = File.join(Rails.root, 'lib', 'common_passwords', '10-char-common-passwords.txt')
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LIST_KEY = 'discourse-common-passwords'
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@mutex = Mutex.new
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def self.common_password?(password)
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return false unless password.present?
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password_list.include?(password)
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end
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private
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class RedisPasswordList
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def include?(password)
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CommonPasswords.redis.sismember CommonPasswords::LIST_KEY, password
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end
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end
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def self.password_list
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@mutex.synchronize do
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load_passwords unless redis.scard(LIST_KEY) > 0
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end
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RedisPasswordList.new
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end
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def self.redis
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$redis.without_namespace
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end
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def self.load_passwords
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passwords = File.readlines(PASSWORD_FILE)
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passwords.map!(&:chomp).each do |pwd|
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# slower, but a tad more compatible
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redis.sadd LIST_KEY, pwd
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end
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rescue Errno::ENOENT
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# tolerate this so we don't block signups
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Rails.logger.error "Common passwords file #{PASSWORD_FILE} is not found! Common password checking is skipped."
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end
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end
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