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|
class Projects::GitHttpController < Projects::ApplicationController
skip_before_action :repository
before_action :authenticate_user
before_action :ensure_project_found?
# GET /foo/bar.git/info/refs?service=git-upload-pack (git pull)
# GET /foo/bar.git/info/refs?service=git-receive-pack (git push)
def info_refs
if upload_pack? && upload_pack_allowed?
render_ok
elsif receive_pack? && receive_pack_allowed?
render_ok
else
render_not_found
end
end
# POST /foo/bar.git/git-upload-pack (git pull)
def git_upload_pack
if upload_pack? && upload_pack_allowed?
render_ok
else
render_not_found
end
end
# POST /foo/bar.git/git-receive-pack" (git push)
def git_receive_pack
if receive_pack? && receive_pack_allowed?
render_ok
else
render_not_found
end
end
private
def authenticate_user
return if project && project.public? && upload_pack?
authenticate_or_request_with_http_basic do |login, password|
return @ci = true if valid_ci_request?(login, password)
@user = Gitlab::Auth.new.find(login, password)
@user ||= oauth_access_token_check(login, password)
rate_limit_ip!(login, @user)
end
end
def ensure_project_found?
render_not_found if project.blank?
end
def valid_ci_request?(login, password)
matched_login = /(?<service>^[a-zA-Z]*-ci)-token$/.match(login)
if project && matched_login.present? && upload_pack?
underscored_service = matched_login['service'].underscore
if underscored_service == 'gitlab_ci'
return project && project.valid_build_token?(password)
elsif Service.available_services_names.include?(underscored_service)
# We treat underscored_service as a trusted input because it is included
# in the Service.available_services_names whitelist.
service_method = "#{underscored_service}_service"
service = project.send(service_method)
return service && service.activated? && service.valid_token?(password)
end
end
false
end
def oauth_access_token_check(login, password)
if login == "oauth2" && upload_pack? && password.present?
token = Doorkeeper::AccessToken.by_token(password)
token && token.accessible? && User.find_by(id: token.resource_owner_id)
end
end
def rate_limit_ip!(login, user)
# If the user authenticated successfully, we reset the auth failure count
# from Rack::Attack for that IP. A client may attempt to authenticate
# with a username and blank password first, and only after it receives
# a 401 error does it present a password. Resetting the count prevents
# false positives from occurring.
#
# Otherwise, we let Rack::Attack know there was a failed authentication
# attempt from this IP. This information is stored in the Rails cache
# (Redis) and will be used by the Rack::Attack middleware to decide
# whether to block requests from this IP.
config = Gitlab.config.rack_attack.git_basic_auth
return user unless config.enabled
if user
# A successful login will reset the auth failure count from this IP
Rack::Attack::Allow2Ban.reset(request.ip, config)
else
banned = Rack::Attack::Allow2Ban.filter(request.ip, config) do
# Unless the IP is whitelisted, return true so that Allow2Ban
# increments the counter (stored in Rails.cache) for the IP
if config.ip_whitelist.include?(request.ip)
false
else
true
end
end
if banned
Rails.logger.info "IP #{request.ip} failed to login " \
"as #{login} but has been temporarily banned from Git auth"
end
end
user
end
def project
return @project if defined?(@project)
@project = find_project
end
def id
id = params[:project_id]
return if id.nil?
%w{.wiki.git .git}.each do |suffix|
# Be careful to only remove the suffix from the end of 'id'.
# Accidentally removing it from the middle is how security
# vulnerabilities happen!
return id.slice(0, id.length - suffix.length) if id.end_with?(suffix)
end
# No valid id was found.
nil
end
def repository
@repository ||= begin
if params[:project_id].end_with?('.wiki.git')
project.wiki.repository
else
project.repository
end
end
end
def upload_pack?
git_command == 'git-upload-pack'
end
def receive_pack?
git_command == 'git-receive-pack'
end
def git_command
if action_name == 'info_refs'
params[:service]
else
action_name.gsub('_', '-')
end
end
def render_ok
render json: Gitlab::Workhorse.git_http_ok(repository, user)
end
def render_not_found
render text: 'Not Found', status: :not_found
end
def ci?
!!@ci
end
def user
@user
end
def upload_pack_allowed?
if !Gitlab.config.gitlab_shell.upload_pack
false
elsif ci?
true
elsif user
Gitlab::GitAccess.new(user, project).download_access_check.allowed?
else
project.public?
end
end
def receive_pack_allowed?
if !Gitlab.config.gitlab_shell.receive_pack
false
elsif user
# Skip user authorization on upload request.
# It will be done by the pre-receive hook in the repository.
true
else
false
end
end
end
|
