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# This file should be identical in GitLab Community Edition and Enterprise Edition
class Projects::GitHttpController < Projects::ApplicationController
include ActionController::HttpAuthentication::Basic
include KerberosSpnegoHelper
attr_reader :user
# Git clients will not know what authenticity token to send along
skip_before_action :verify_authenticity_token
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
if project && project.public? && upload_pack?
return # Allow access
end
if allow_basic_auth? && basic_auth_provided?
login, password = user_name_and_password(request)
auth_result = Gitlab::Auth.find_for_git_client(login, password, project: project, ip: request.ip)
if auth_result.type == :ci && upload_pack?
@ci = true
elsif auth_result.type == :oauth && !upload_pack?
# Not allowed
else
@user = auth_result.user
end
if ci? || user
return # Allow access
end
elsif allow_kerberos_spnego_auth? && spnego_provided?
@user = find_kerberos_user
if user
send_final_spnego_response
return # Allow access
end
end
send_challenges
render plain: "HTTP Basic: Access denied\n", status: 401
end
def basic_auth_provided?
has_basic_credentials?(request)
end
def send_challenges
challenges = []
challenges << 'Basic realm="GitLab"' if allow_basic_auth?
challenges << spnego_challenge if allow_kerberos_spnego_auth?
headers['Www-Authenticate'] = challenges.join("\n") if challenges.any?
end
def ensure_project_found!
render_not_found if project.blank?
end
def project
return @project if defined?(@project)
project_id, _ = project_id_with_suffix
if project_id.blank?
@project = nil
else
@project = Project.find_with_namespace("#{params[:namespace_id]}/#{project_id}")
end
end
# This method returns two values so that we can parse
# params[:project_id] (untrusted input!) in exactly one place.
def project_id_with_suffix
id = params[:project_id] || ''
%w[.wiki.git .git].each do |suffix|
if id.end_with?(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), suffix]
end
end
# Something is wrong with params[:project_id]; do not pass it on.
[nil, nil]
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.dasherize
end
end
def render_ok
render json: Gitlab::Workhorse.git_http_ok(repository, user)
end
def repository
_, suffix = project_id_with_suffix
if suffix == '.wiki.git'
project.wiki.repository
else
project.repository
end
end
def render_not_found
render plain: 'Not Found', status: :not_found
end
def ci?
@ci.present?
end
def upload_pack_allowed?
return false unless Gitlab.config.gitlab_shell.upload_pack
if user
Gitlab::GitAccess.new(user, project).download_access_check.allowed?
else
ci? || project.public?
end
end
def receive_pack_allowed?
return false unless Gitlab.config.gitlab_shell.receive_pack
# Skip user authorization on upload request.
# It will be done by the pre-receive hook in the repository.
user.present?
end
end
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