472 lines
13 KiB
Ruby
472 lines
13 KiB
Ruby
# frozen_string_literal: true
|
|
require_relative '../route_matcher'
|
|
|
|
# You may have seen references to v0 and v1 of our auth cookie in the codebase
|
|
# and you're not sure how they differ, so here is an explanation:
|
|
#
|
|
# From the very early days of Discourse, the auth cookie (_t) consisted only of
|
|
# a 32 characters random string that Discourse used to identify/lookup the
|
|
# current user. We didn't include any metadata with the cookie or encrypt/sign
|
|
# it.
|
|
#
|
|
# That was v0 of the auth cookie until Nov 2021 when we merged a change that
|
|
# required us to store additional metadata with the cookie so we could get more
|
|
# information about current user early in the request lifecycle before we
|
|
# performed database lookup. We also started encrypting and signing the cookie
|
|
# to prevent tampering and obfuscate user information that we include in the
|
|
# cookie. This is v1 of our auth cookie and we still use it to this date.
|
|
#
|
|
# We still accept v0 of the auth cookie to keep users logged in, but upon
|
|
# cookie rotation (which happen every 10 minutes) they'll be switched over to
|
|
# the v1 format.
|
|
#
|
|
# We'll drop support for v0 after Discourse 2.9 is released.
|
|
|
|
class Auth::DefaultCurrentUserProvider
|
|
|
|
CURRENT_USER_KEY ||= "_DISCOURSE_CURRENT_USER"
|
|
API_KEY ||= "api_key"
|
|
API_USERNAME ||= "api_username"
|
|
HEADER_API_KEY ||= "HTTP_API_KEY"
|
|
HEADER_API_USERNAME ||= "HTTP_API_USERNAME"
|
|
HEADER_API_USER_EXTERNAL_ID ||= "HTTP_API_USER_EXTERNAL_ID"
|
|
HEADER_API_USER_ID ||= "HTTP_API_USER_ID"
|
|
PARAMETER_USER_API_KEY ||= "user_api_key"
|
|
USER_API_KEY ||= "HTTP_USER_API_KEY"
|
|
USER_API_CLIENT_ID ||= "HTTP_USER_API_CLIENT_ID"
|
|
API_KEY_ENV ||= "_DISCOURSE_API"
|
|
USER_API_KEY_ENV ||= "_DISCOURSE_USER_API"
|
|
TOKEN_COOKIE ||= ENV['DISCOURSE_TOKEN_COOKIE'] || "_t"
|
|
PATH_INFO ||= "PATH_INFO"
|
|
COOKIE_ATTEMPTS_PER_MIN ||= 10
|
|
BAD_TOKEN ||= "_DISCOURSE_BAD_TOKEN"
|
|
DECRYPTED_AUTH_COOKIE = "_DISCOURSE_DECRYPTED_AUTH_COOKIE"
|
|
|
|
TOKEN_SIZE = 32
|
|
|
|
PARAMETER_API_PATTERNS ||= [
|
|
RouteMatcher.new(
|
|
methods: :get,
|
|
actions: [
|
|
"posts#latest",
|
|
"posts#user_posts_feed",
|
|
"groups#posts_feed",
|
|
"groups#mentions_feed",
|
|
"list#user_topics_feed",
|
|
"list#category_feed",
|
|
"topics#feed",
|
|
"badges#show",
|
|
"tags#tag_feed",
|
|
"tags#show",
|
|
*[:latest, :unread, :new, :read, :posted, :bookmarks].map { |f| "list##{f}_feed" },
|
|
*[:all, :yearly, :quarterly, :monthly, :weekly, :daily].map { |p| "list#top_#{p}_feed" },
|
|
*[:latest, :unread, :new, :read, :posted, :bookmarks].map { |f| "tags#show_#{f}" }
|
|
],
|
|
formats: :rss
|
|
),
|
|
RouteMatcher.new(
|
|
methods: :get,
|
|
actions: "users#bookmarks",
|
|
formats: :ics
|
|
),
|
|
RouteMatcher.new(
|
|
methods: :post,
|
|
actions: "admin/email#handle_mail",
|
|
formats: nil
|
|
),
|
|
]
|
|
|
|
def self.find_v0_auth_cookie(request)
|
|
cookie = request.cookies[TOKEN_COOKIE].presence
|
|
if cookie && cookie.size == TOKEN_SIZE
|
|
cookie
|
|
end
|
|
end
|
|
|
|
def self.find_v1_auth_cookie(env)
|
|
return env[DECRYPTED_AUTH_COOKIE] if env.key?(DECRYPTED_AUTH_COOKIE)
|
|
|
|
env[DECRYPTED_AUTH_COOKIE] = begin
|
|
request = ActionDispatch::Request.new(env)
|
|
# don't even initialize a cookie jar if we don't have a cookie at all
|
|
if request.cookies[TOKEN_COOKIE].present?
|
|
request.cookie_jar.encrypted[TOKEN_COOKIE]
|
|
end
|
|
end
|
|
end
|
|
|
|
# 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 = Discourse.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
|
|
|
|
user_api_key = @env[USER_API_KEY]
|
|
api_key = @env[HEADER_API_KEY]
|
|
|
|
if !@env.blank? && request[PARAMETER_USER_API_KEY] && api_parameter_allowed?
|
|
user_api_key ||= request[PARAMETER_USER_API_KEY]
|
|
end
|
|
|
|
if !@env.blank? && request[API_KEY] && api_parameter_allowed?
|
|
api_key ||= request[API_KEY]
|
|
end
|
|
|
|
auth_token = find_auth_token
|
|
current_user = nil
|
|
|
|
if auth_token
|
|
limiter = RateLimiter.new(nil, "cookie_auth_#{request.ip}", COOKIE_ATTEMPTS_PER_MIN , 60)
|
|
|
|
if limiter.can_perform?
|
|
@user_token = begin
|
|
UserAuthToken.lookup(
|
|
auth_token,
|
|
seen: true,
|
|
user_agent: @env['HTTP_USER_AGENT'],
|
|
path: @env['REQUEST_PATH'],
|
|
client_ip: @request.ip
|
|
)
|
|
rescue ActiveRecord::ReadOnlyError
|
|
nil
|
|
end
|
|
|
|
current_user = @user_token.try(:user)
|
|
end
|
|
|
|
if !current_user
|
|
@env[BAD_TOKEN] = true
|
|
begin
|
|
limiter.performed!
|
|
rescue RateLimiter::LimitExceeded
|
|
raise Discourse::InvalidAccess.new(
|
|
'Invalid Access',
|
|
nil,
|
|
delete_cookie: TOKEN_COOKIE
|
|
)
|
|
end
|
|
end
|
|
elsif @env['HTTP_DISCOURSE_LOGGED_IN']
|
|
@env[BAD_TOKEN] = true
|
|
end
|
|
|
|
# possible we have an api call, impersonate
|
|
if api_key
|
|
current_user = lookup_api_user(api_key, request)
|
|
if !current_user
|
|
raise Discourse::InvalidAccess.new(
|
|
I18n.t('invalid_api_credentials'),
|
|
nil,
|
|
custom_message: "invalid_api_credentials"
|
|
)
|
|
end
|
|
raise Discourse::InvalidAccess if current_user.suspended? || !current_user.active
|
|
admin_api_key_limiter.performed! if !Rails.env.profile?
|
|
@env[API_KEY_ENV] = true
|
|
end
|
|
|
|
# user api key handling
|
|
if user_api_key
|
|
@hashed_user_api_key = ApiKey.hash_key(user_api_key)
|
|
|
|
user_api_key_obj = UserApiKey
|
|
.active
|
|
.joins(:user)
|
|
.where(key_hash: @hashed_user_api_key)
|
|
.includes(:user, :scopes)
|
|
.first
|
|
|
|
raise Discourse::InvalidAccess unless user_api_key_obj
|
|
|
|
user_api_key_limiter_60_secs.performed!
|
|
user_api_key_limiter_1_day.performed!
|
|
|
|
user_api_key_obj.ensure_allowed!(@env)
|
|
|
|
current_user = user_api_key_obj.user
|
|
raise Discourse::InvalidAccess if current_user.suspended? || !current_user.active
|
|
|
|
if can_write?
|
|
user_api_key_obj.update_last_used(@env[USER_API_CLIENT_ID])
|
|
end
|
|
|
|
@env[USER_API_KEY_ENV] = true
|
|
end
|
|
|
|
# keep this rule here as a safeguard
|
|
# under no conditions to suspended or inactive accounts get current_user
|
|
if current_user && (current_user.suspended? || !current_user.active)
|
|
current_user = nil
|
|
end
|
|
|
|
if current_user && should_update_last_seen?
|
|
u = current_user
|
|
ip = request.ip
|
|
|
|
Scheduler::Defer.later "Updating Last Seen" do
|
|
u.update_last_seen!
|
|
u.update_ip_address!(ip)
|
|
end
|
|
end
|
|
|
|
@env[CURRENT_USER_KEY] = current_user
|
|
end
|
|
|
|
def refresh_session(user, session, cookie_jar)
|
|
# if user was not loaded, no point refreshing session
|
|
# it could be an anonymous path, this would add cost
|
|
return if is_api? || !@env.key?(CURRENT_USER_KEY)
|
|
|
|
if !is_user_api? && @user_token && @user_token.user == user
|
|
rotated_at = @user_token.rotated_at
|
|
|
|
needs_rotation = @user_token.auth_token_seen ? rotated_at < UserAuthToken::ROTATE_TIME.ago : rotated_at < UserAuthToken::URGENT_ROTATE_TIME.ago
|
|
|
|
if needs_rotation
|
|
if @user_token.rotate!(user_agent: @env['HTTP_USER_AGENT'],
|
|
client_ip: @request.ip,
|
|
path: @env['REQUEST_PATH'])
|
|
set_auth_cookie!(@user_token.unhashed_auth_token, user, cookie_jar)
|
|
DiscourseEvent.trigger(:user_session_refreshed, user)
|
|
end
|
|
end
|
|
end
|
|
|
|
if !user && cookie_jar.key?(TOKEN_COOKIE)
|
|
cookie_jar.delete(TOKEN_COOKIE)
|
|
end
|
|
end
|
|
|
|
def log_on_user(user, session, cookie_jar, opts = {})
|
|
@user_token = UserAuthToken.generate!(
|
|
user_id: user.id,
|
|
user_agent: @env['HTTP_USER_AGENT'],
|
|
path: @env['REQUEST_PATH'],
|
|
client_ip: @request.ip,
|
|
staff: user.staff?,
|
|
impersonate: opts[:impersonate])
|
|
|
|
set_auth_cookie!(@user_token.unhashed_auth_token, user, cookie_jar)
|
|
user.unstage!
|
|
make_developer_admin(user)
|
|
enable_bootstrap_mode(user)
|
|
|
|
UserAuthToken.enforce_session_count_limit!(user.id)
|
|
|
|
@env[CURRENT_USER_KEY] = user
|
|
end
|
|
|
|
def set_auth_cookie!(unhashed_auth_token, user, cookie_jar)
|
|
data = {
|
|
token: unhashed_auth_token,
|
|
user_id: user.id,
|
|
trust_level: user.trust_level,
|
|
issued_at: Time.zone.now.to_i
|
|
}
|
|
|
|
if SiteSetting.persistent_sessions
|
|
expires = SiteSetting.maximum_session_age.hours.from_now
|
|
end
|
|
|
|
if SiteSetting.same_site_cookies != "Disabled"
|
|
same_site = SiteSetting.same_site_cookies
|
|
end
|
|
|
|
cookie_jar.encrypted[TOKEN_COOKIE] = {
|
|
value: data,
|
|
httponly: true,
|
|
secure: SiteSetting.force_https,
|
|
expires: expires,
|
|
same_site: same_site
|
|
}
|
|
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)
|
|
return if SiteSetting.bootstrap_mode_enabled
|
|
|
|
if user.admin && user.last_seen_at.nil? && user.is_singular_admin?
|
|
Jobs.enqueue(:enable_bootstrap_mode, user_id: user.id)
|
|
end
|
|
end
|
|
|
|
def log_off_user(session, cookie_jar)
|
|
user = current_user
|
|
|
|
if SiteSetting.log_out_strict && user
|
|
user.user_auth_tokens.destroy_all
|
|
|
|
if user.admin && defined?(Rack::MiniProfiler)
|
|
# clear the profiling cookie to keep stuff tidy
|
|
cookie_jar.delete("__profilin")
|
|
end
|
|
|
|
user.logged_out
|
|
elsif user && @user_token
|
|
@user_token.destroy
|
|
end
|
|
|
|
cookie_jar.delete('authentication_data')
|
|
cookie_jar.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 is_user_api?
|
|
current_user
|
|
!!(@env[USER_API_KEY_ENV])
|
|
end
|
|
|
|
def has_auth_cookie?
|
|
find_auth_token.present?
|
|
end
|
|
|
|
def should_update_last_seen?
|
|
return false unless can_write?
|
|
|
|
api = !!@env[API_KEY_ENV] || !!@env[USER_API_KEY_ENV]
|
|
|
|
if @request.xhr? || api
|
|
@env["HTTP_DISCOURSE_PRESENT"] == "true"
|
|
else
|
|
true
|
|
end
|
|
end
|
|
|
|
protected
|
|
|
|
def lookup_api_user(api_key_value, request)
|
|
if api_key = ApiKey.active.with_key(api_key_value).includes(:user).first
|
|
api_username = header_api_key? ? @env[HEADER_API_USERNAME] : request[API_USERNAME]
|
|
|
|
if !api_key.request_allowed?(@env)
|
|
return nil
|
|
end
|
|
|
|
user =
|
|
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)
|
|
elsif user_id = header_api_key? ? @env[HEADER_API_USER_ID] : request["api_user_id"]
|
|
User.find_by(id: user_id.to_i)
|
|
elsif external_id = header_api_key? ? @env[HEADER_API_USER_EXTERNAL_ID] : request["api_user_external_id"]
|
|
SingleSignOnRecord.find_by(external_id: external_id.to_s).try(:user)
|
|
end
|
|
|
|
if user && can_write?
|
|
Scheduler::Defer.later "Updating api_key last_used" do
|
|
api_key.update_last_used!
|
|
end
|
|
end
|
|
|
|
user
|
|
end
|
|
end
|
|
|
|
private
|
|
|
|
def parameter_api_patterns
|
|
PARAMETER_API_PATTERNS + DiscoursePluginRegistry.api_parameter_routes
|
|
end
|
|
|
|
# By default we only allow headers for sending API credentials
|
|
# However, in some scenarios it is essential to send them via url parameters
|
|
# so we need to add some exceptions
|
|
def api_parameter_allowed?
|
|
parameter_api_patterns.any? { |p| p.match?(env: @env) }
|
|
end
|
|
|
|
def header_api_key?
|
|
!!@env[HEADER_API_KEY]
|
|
end
|
|
|
|
def can_write?
|
|
@can_write ||= !Discourse.pg_readonly_mode?
|
|
end
|
|
|
|
def admin_api_key_limiter
|
|
return @admin_api_key_limiter if @admin_api_key_limiter
|
|
|
|
limit = GlobalSetting.max_admin_api_reqs_per_minute.to_i
|
|
if GlobalSetting.respond_to?(:max_admin_api_reqs_per_key_per_minute)
|
|
Discourse.deprecate("DISCOURSE_MAX_ADMIN_API_REQS_PER_KEY_PER_MINUTE is deprecated. Please use DISCOURSE_MAX_ADMIN_API_REQS_PER_MINUTE", drop_from: '2.9.0')
|
|
limit = [
|
|
GlobalSetting.max_admin_api_reqs_per_key_per_minute.to_i,
|
|
limit
|
|
].max
|
|
end
|
|
@admin_api_key_limiter = RateLimiter.new(
|
|
nil,
|
|
"admin_api_min",
|
|
limit,
|
|
60,
|
|
error_code: "admin_api_key_rate_limit"
|
|
)
|
|
end
|
|
|
|
def user_api_key_limiter_60_secs
|
|
@user_api_key_limiter_60_secs ||= RateLimiter.new(
|
|
nil,
|
|
"user_api_min_#{@hashed_user_api_key}",
|
|
GlobalSetting.max_user_api_reqs_per_minute,
|
|
60,
|
|
error_code: "user_api_key_limiter_60_secs"
|
|
)
|
|
end
|
|
|
|
def user_api_key_limiter_1_day
|
|
@user_api_key_limiter_1_day ||= RateLimiter.new(
|
|
nil,
|
|
"user_api_day_#{@hashed_user_api_key}",
|
|
GlobalSetting.max_user_api_reqs_per_day,
|
|
86400,
|
|
error_code: "user_api_key_limiter_1_day"
|
|
)
|
|
end
|
|
|
|
def find_auth_token
|
|
return @auth_token if defined?(@auth_token)
|
|
|
|
@auth_token = begin
|
|
if v0 = self.class.find_v0_auth_cookie(@request)
|
|
v0
|
|
elsif v1 = self.class.find_v1_auth_cookie(@env)
|
|
if v1[:issued_at] >= SiteSetting.maximum_session_age.hours.ago.to_i
|
|
v1[:token]
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|