discourse/lib/auth/default_current_user_provider.rb

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require_dependency "auth/current_user_provider"
require_dependency "rate_limiter"
class Auth::DefaultCurrentUserProvider
CURRENT_USER_KEY ||= "_DISCOURSE_CURRENT_USER".freeze
API_KEY ||= "api_key".freeze
API_KEY_ENV ||= "_DISCOURSE_API".freeze
TOKEN_COOKIE ||= "_t".freeze
PATH_INFO ||= "PATH_INFO".freeze
COOKIE_ATTEMPTS_PER_MIN ||= 10
# do all current user initialization here
def initialize(env)
@env = env
@request = Rack::Request.new(env)
end
# our current user, return nil if none is found
def current_user
return @env[CURRENT_USER_KEY] if @env.key?(CURRENT_USER_KEY)
# bypass if we have the shared session header
if shared_key = @env['HTTP_X_SHARED_SESSION_KEY']
uid = $redis.get("shared_session_key_#{shared_key}")
user = nil
if uid
user = User.find_by(id: uid.to_i)
end
@env[CURRENT_USER_KEY] = user
return user
end
request = @request
auth_token = request.cookies[TOKEN_COOKIE]
current_user = nil
if auth_token && auth_token.length == 32
limiter = RateLimiter.new(nil, "cookie_auth_#{request.ip}", COOKIE_ATTEMPTS_PER_MIN ,60)
if limiter.can_perform?
current_user = User.where(auth_token: auth_token)
.where('auth_token_updated_at IS NULL OR auth_token_updated_at > ?',
SiteSetting.maximum_session_age.hours.ago)
.first
end
unless current_user
begin
limiter.performed!
rescue RateLimiter::LimitExceeded
raise Discourse::InvalidAccess
end
end
end
if current_user && (current_user.suspended? || !current_user.active)
current_user = nil
end
if current_user && should_update_last_seen?
u = current_user
Scheduler::Defer.later "Updating Last Seen" do
u.update_last_seen!
u.update_ip_address!(request.ip)
end
end
# possible we have an api call, impersonate
if api_key = request[API_KEY]
current_user = lookup_api_user(api_key, request)
raise Discourse::InvalidAccess unless current_user
@env[API_KEY_ENV] = true
end
@env[CURRENT_USER_KEY] = current_user
end
def refresh_session(user, session, cookies)
if user && (!user.auth_token_updated_at || user.auth_token_updated_at <= 1.hour.ago)
user.update_column(:auth_token_updated_at, Time.zone.now)
cookies[TOKEN_COOKIE] = { value: user.auth_token, httponly: true, expires: SiteSetting.maximum_session_age.hours.from_now }
end
if !user && cookies.key?(TOKEN_COOKIE)
cookies.delete(TOKEN_COOKIE)
end
end
def log_on_user(user, session, cookies)
legit_token = user.auth_token && user.auth_token.length == 32
expired_token = user.auth_token_updated_at && user.auth_token_updated_at < SiteSetting.maximum_session_age.hours.ago
if !legit_token || expired_token
user.update_columns(auth_token: SecureRandom.hex(16),
auth_token_updated_at: Time.zone.now)
end
cookies[TOKEN_COOKIE] = { value: user.auth_token, httponly: true, expires: SiteSetting.maximum_session_age.hours.from_now }
make_developer_admin(user)
enable_bootstrap_mode(user)
@env[CURRENT_USER_KEY] = user
end
def make_developer_admin(user)
if user.active? &&
!user.admin &&
Rails.configuration.respond_to?(:developer_emails) &&
Rails.configuration.developer_emails.include?(user.email)
user.admin = true
user.save
end
end
def enable_bootstrap_mode(user)
Jobs.enqueue(:enable_bootstrap_mode, user_id: user.id) if user.admin && user.last_seen_at.nil? && !SiteSetting.bootstrap_mode_enabled && user.is_singular_admin?
end
def log_off_user(session, cookies)
if SiteSetting.log_out_strict && (user = current_user)
user.auth_token = nil
user.save!
if user.admin && defined?(Rack::MiniProfiler)
# clear the profiling cookie to keep stuff tidy
cookies.delete("__profilin")
end
user.logged_out
end
cookies.delete(TOKEN_COOKIE)
end
# api has special rights return true if api was detected
def is_api?
current_user
@env[API_KEY_ENV]
end
def has_auth_cookie?
cookie = @request.cookies[TOKEN_COOKIE]
!cookie.nil? && cookie.length == 32
end
def should_update_last_seen?
!(@request.path =~ /^\/message-bus\//)
end
protected
def lookup_api_user(api_key_value, request)
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if api_key = ApiKey.where(key: api_key_value).includes(:user).first
api_username = request["api_username"]
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if api_key.allowed_ips.present? && !api_key.allowed_ips.any? { |ip| ip.include?(request.ip) }
Rails.logger.warn("[Unauthorized API Access] username: #{api_username}, IP address: #{request.ip}")
return nil
end
if api_key.user
api_key.user if !api_username || (api_key.user.username_lower == api_username.downcase)
elsif api_username
User.find_by(username_lower: api_username.downcase)
end
end
end
end