Class: UserAuthToken

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
app/models/user_auth_token.rb

Constant Summary collapse

ROTATE_TIME_MINS = 
10
ROTATE_TIME = 
ROTATE_TIME_MINS.minutes
URGENT_ROTATE_TIME =

used when token did not arrive at client

1.minute
MAX_SESSION_COUNT = 
60
USER_ACTIONS = 
["generate"]
RAD_PER_DEG = 
Math::PI / 180
EARTH_RADIUS_KM =

kilometers

6371

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#unhashed_auth_token ⇒ Object

Returns the value of attribute unhashed_auth_token.



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# File 'app/models/user_auth_token.rb', line 16

def unhashed_auth_token
  @unhashed_auth_token
end

Class Method Details

.cleanup! ⇒ Object 



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# File 'app/models/user_auth_token.rb', line 198

def self.cleanup!
  if SiteSetting.verbose_auth_token_logging
    UserAuthTokenLog.where(
      "created_at < :time",
      time: SiteSetting.maximum_session_age.hours.ago - ROTATE_TIME,
    ).delete_all
  end

  where(
    "rotated_at < :time",
    time: SiteSetting.maximum_session_age.hours.ago - ROTATE_TIME,
  ).delete_all
end

.distance(loc1, loc2) ⇒ Object 



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# File 'app/models/user_auth_token.rb', line 46

def self.distance(loc1, loc2)
  lat1_rad, lon1_rad = loc1[0] * RAD_PER_DEG, loc1[1] * RAD_PER_DEG
  lat2_rad, lon2_rad = loc2[0] * RAD_PER_DEG, loc2[1] * RAD_PER_DEG

  a =
    Math.sin((lat2_rad - lat1_rad) / 2)**2 +
      Math.cos(lat1_rad) * Math.cos(lat2_rad) * Math.sin((lon2_rad - lon1_rad) / 2)**2
  c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a))

  c * EARTH_RADIUS_KM
end

.enforce_session_count_limit!(user_id) ⇒ Object 



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# File 'app/models/user_auth_token.rb', line 260

def self.enforce_session_count_limit!(user_id)
  tokens_to_destroy =
    where(user_id: user_id)
      .where("rotated_at > ?", SiteSetting.maximum_session_age.hours.ago)
      .order("rotated_at DESC")
      .offset(MAX_SESSION_COUNT)

  tokens_to_destroy.delete_all # Returns the number of deleted rows
end

.generate!(user_id:, user_agent: nil, client_ip: nil, path: nil, staff: nil, impersonate: false) ⇒ Object 



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# File 'app/models/user_auth_token.rb', line 75

def self.generate!(
  user_id:,
  user_agent: nil,
  client_ip: nil,
  path: nil,
  staff: nil,
  impersonate: false
)
  token = SecureRandom.hex(16)
  hashed_token = hash_token(token)
  user_auth_token =
    UserAuthToken.create!(
      user_id: user_id,
      user_agent: user_agent,
      client_ip: client_ip,
      auth_token: hashed_token,
      prev_auth_token: hashed_token,
      rotated_at: Time.zone.now,
    )
  user_auth_token.unhashed_auth_token = token

  log(
    action: "generate",
    user_auth_token_id: user_auth_token.id,
    user_id: user_id,
    user_agent: user_agent,
    client_ip: client_ip,
    path: path,
    auth_token: hashed_token,
  )

  if staff && !impersonate
    Jobs.enqueue(
      :suspicious_login,
      user_id: user_id,
      client_ip: client_ip,
      user_agent: user_agent,
    )
  end

  user_auth_token
end

.hash_token(token) ⇒ Object 



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# File 'app/models/user_auth_token.rb', line 194

def self.hash_token(token)
  Digest::SHA1.base64digest("#{token}#{GlobalSetting.safe_secret_key_base}")
end

.is_suspicious(user_id, user_ip) ⇒ Object 



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# File 'app/models/user_auth_token.rb', line 58

def self.is_suspicious(user_id, user_ip)
  return false unless User.find_by(id: user_id)&.staff?

  ips = UserAuthTokenLog.where(user_id: user_id).pluck(:client_ip)
  ips.delete_at(ips.index(user_ip) || ips.length) # delete one occurrence (current)
  ips.uniq!
  return false if ips.empty? # first login is never suspicious

  if user_location = (user_ip)
    ips.none? do |ip|
      if location = (ip)
        distance(user_location, location) < SiteSetting.max_suspicious_distance_km
      end
    end
  end
end

.log(info) ⇒ Object 



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# File 'app/models/user_auth_token.rb', line 29

def self.log(info)
  UserAuthTokenLog.create!(info)
end

.log_verbose(info) ⇒ Object 



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# File 'app/models/user_auth_token.rb', line 33

def self.log_verbose(info)
  log(info) if SiteSetting.verbose_auth_token_logging
end

.login_location(ip) ⇒ Object 



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# File 'app/models/user_auth_token.rb', line 40

def self.(ip)
  ipinfo = DiscourseIpInfo.get(ip)

  ipinfo[:latitude] && ipinfo[:longitude] ? [ipinfo[:latitude], ipinfo[:longitude]] : nil
end

.lookup(unhashed_token, opts = nil) ⇒ Object 



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# File 'app/models/user_auth_token.rb', line 118

def self.lookup(unhashed_token, opts = nil)
  mark_seen = opts && opts[:seen]

  token = hash_token(unhashed_token)
  expire_before = SiteSetting.maximum_session_age.hours.ago

  user_token =
    find_by(
      "(auth_token = :token OR
                        prev_auth_token = :token) AND rotated_at > :expire_before",
      token: token,
      expire_before: expire_before,
    )

  if !user_token
    log_verbose(
      action: "miss token",
      user_id: nil,
      auth_token: token,
      user_agent: opts && opts[:user_agent],
      path: opts && opts[:path],
      client_ip: opts && opts[:client_ip],
    )

    return nil
  end

  if user_token.auth_token != token && user_token.prev_auth_token == token &&
       user_token.auth_token_seen
    changed_rows =
      UserAuthToken
        .where("rotated_at < ?", 1.minute.ago)
        .where(id: user_token.id, prev_auth_token: token)
        .update_all(auth_token_seen: false)

    # not updating AR model cause we want to give it one more req
    # with wrong cookie
    UserAuthToken.log_verbose(
      action: changed_rows == 0 ? "prev seen token unchanged" : "prev seen token",
      user_auth_token_id: user_token.id,
      user_id: user_token.user_id,
      auth_token: user_token.auth_token,
      user_agent: opts && opts[:user_agent],
      path: opts && opts[:path],
      client_ip: opts && opts[:client_ip],
    )
  end

  if mark_seen && user_token && !user_token.auth_token_seen && user_token.auth_token == token
    # we must protect against concurrency issues here
    changed_rows =
      UserAuthToken.where(id: user_token.id, auth_token: token).update_all(
        auth_token_seen: true,
        seen_at: Time.zone.now,
      )

    if changed_rows == 1
      # not doing a reload so we don't risk loading a rotated token
      user_token.auth_token_seen = true
      user_token.seen_at = Time.zone.now
    end

    log_verbose(
      action: changed_rows == 0 ? "seen wrong token" : "seen token",
      user_auth_token_id: user_token.id,
      user_id: user_token.user_id,
      auth_token: user_token.auth_token,
      user_agent: opts && opts[:user_agent],
      path: opts && opts[:path],
      client_ip: opts && opts[:client_ip],
    )
  end

  user_token
end

Instance Method Details

#rotate!(info = nil) ⇒ Object 



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# File 'app/models/user_auth_token.rb', line 212

def rotate!(info = nil)
  user_agent = (info && info[:user_agent] || self.user_agent)
  client_ip = (info && info[:client_ip] || self.client_ip)

  token = SecureRandom.hex(16)

  result =
    DB.exec(
      "
UPDATE user_auth_tokens
SET
  auth_token_seen = false,
  seen_at = null,
  user_agent = :user_agent,
  client_ip = :client_ip,
  prev_auth_token = case when auth_token_seen then auth_token else prev_auth_token end,
  auth_token = :new_token,
  rotated_at = :now
WHERE id = :id AND (auth_token_seen or rotated_at < :safeguard_time)
",
      id: self.id,
      user_agent: user_agent,
      client_ip: client_ip&.to_s,
      now: Time.zone.now,
      new_token: UserAuthToken.hash_token(token),
      safeguard_time: 30.seconds.ago,
    )

  if result > 0
    reload
    self.unhashed_auth_token = token

    UserAuthToken.log(
      action: "rotate",
      user_auth_token_id: id,
      user_id: user_id,
      auth_token: auth_token,
      user_agent: user_agent,
      client_ip: client_ip,
      path: info && info[:path],
    )

    true
  else
    false
  end
end