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# frozen_string_literal: true
module Gitlab
module Auth
AuthenticationError = Class.new(StandardError)
MissingTokenError = Class.new(AuthenticationError)
TokenNotFoundError = Class.new(AuthenticationError)
ExpiredError = Class.new(AuthenticationError)
RevokedError = Class.new(AuthenticationError)
ImpersonationDisabled = Class.new(AuthenticationError)
UnauthorizedError = Class.new(AuthenticationError)
class InsufficientScopeError < AuthenticationError
attr_reader :scopes
def initialize(scopes)
@scopes = scopes.map { |s| s.try(:name) || s }
end
end
module UserAuthFinders
include Gitlab::Utils::StrongMemoize
PRIVATE_TOKEN_HEADER = 'HTTP_PRIVATE_TOKEN'.freeze
PRIVATE_TOKEN_PARAM = :private_token
# Check the Rails session for valid authentication details
def find_user_from_warden
current_request.env['warden']&.authenticate if verified_request?
end
def find_user_from_feed_token(request_format)
return unless valid_rss_format?(request_format)
# NOTE: feed_token was renamed from rss_token but both needs to be supported because
# users might have already added the feed to their RSS reader before the rename
token = current_request.params[:feed_token].presence || current_request.params[:rss_token].presence
return unless token
User.find_by_feed_token(token) || raise(UnauthorizedError)
end
# We only allow Private Access Tokens with `api` scope to be used by web
# requests on RSS feeds or ICS files for backwards compatibility.
# It is also used by GraphQL/API requests.
def find_user_from_web_access_token(request_format)
return unless access_token && valid_web_access_format?(request_format)
validate_access_token!(scopes: [:api])
access_token.user || raise(UnauthorizedError)
end
def find_user_from_access_token
return unless access_token
validate_access_token!
access_token.user || raise(UnauthorizedError)
end
def validate_access_token!(scopes: [])
return unless access_token
case AccessTokenValidationService.new(access_token, request: request).validate(scopes: scopes)
when AccessTokenValidationService::INSUFFICIENT_SCOPE
raise InsufficientScopeError.new(scopes)
when AccessTokenValidationService::EXPIRED
raise ExpiredError
when AccessTokenValidationService::REVOKED
raise RevokedError
when AccessTokenValidationService::IMPERSONATION_DISABLED
raise ImpersonationDisabled
end
end
private
def route_authentication_setting
return {} unless respond_to?(:route_setting)
route_setting(:authentication) || {}
end
def access_token
strong_memoize(:access_token) do
find_oauth_access_token || find_personal_access_token
end
end
def find_personal_access_token
token =
current_request.params[PRIVATE_TOKEN_PARAM].presence ||
current_request.env[PRIVATE_TOKEN_HEADER].presence
return unless token
# Expiration, revocation and scopes are verified in `validate_access_token!`
PersonalAccessToken.find_by_token(token) || raise(UnauthorizedError)
end
def find_oauth_access_token
token = Doorkeeper::OAuth::Token.from_request(current_request, *Doorkeeper.configuration.access_token_methods)
return unless token
# Expiration, revocation and scopes are verified in `validate_access_token!`
oauth_token = OauthAccessToken.by_token(token)
raise UnauthorizedError unless oauth_token
oauth_token.revoke_previous_refresh_token!
oauth_token
end
# Check if the request is GET/HEAD, or if CSRF token is valid.
def verified_request?
Gitlab::RequestForgeryProtection.verified?(current_request.env)
end
def ensure_action_dispatch_request(request)
ActionDispatch::Request.new(request.env.dup)
end
def current_request
@current_request ||= ensure_action_dispatch_request(request)
end
def valid_web_access_format?(request_format)
case request_format
when :rss
rss_request?
when :ics
ics_request?
when :api
api_request?
end
end
def valid_rss_format?(request_format)
case request_format
when :rss
rss_request?
when :ics
ics_request?
end
end
def rss_request?
current_request.path.ends_with?('.atom') || current_request.format.atom?
end
def ics_request?
current_request.path.ends_with?('.ics') || current_request.format.ics?
end
def api_request?
current_request.path.starts_with?("/api/")
end
end
end
end
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