1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
module Grack
class AuthSpawner
def self.call(env)
# Avoid issues with instance variables in Grack::Auth persisting across
# requests by creating a new instance for each request.
Auth.new({}).call(env)
end
end
class Auth < Rack::Auth::Basic
attr_accessor :user, :project, :env
def call(env)
@env = env
@request = Rack::Request.new(env)
@auth = Request.new(env)
@ci = false
# Need this patch due to the rails mount
# Need this if under RELATIVE_URL_ROOT
unless Gitlab.config.gitlab.relative_url_root.empty?
# If website is mounted using relative_url_root need to remove it first
@env['PATH_INFO'] = @request.path.sub(Gitlab.config.gitlab.relative_url_root, '')
else
@env['PATH_INFO'] = @request.path
end
@env['SCRIPT_NAME'] = ""
auth!
lfs_response = Gitlab::Lfs::Router.new(project, @user, @ci, @request).try_call
return lfs_response unless lfs_response.nil?
if @user.nil? && !@ci
unauthorized
else
render_not_found
end
end
private
def auth!
return unless @auth.provided?
return bad_request unless @auth.basic?
# Authentication with username and password
login, password = @auth.credentials
# Allow authentication for GitLab CI service
# if valid token passed
if ci_request?(login, password)
@ci = true
return
end
@user = authenticate_user(login, password)
end
def ci_request?(login, password)
matched_login = /(?<s>^[a-zA-Z]*-ci)-token$/.match(login)
if project && matched_login.present?
underscored_service = matched_login['s'].underscore
if underscored_service == 'gitlab_ci'
return project && project.valid_build_token?(password)
elsif Service.available_services_names.include?(underscored_service)
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" && git_cmd == 'git-upload-pack' && password.present?
token = Doorkeeper::AccessToken.by_token(password)
token && token.accessible? && User.find_by(id: token.resource_owner_id)
end
end
def authenticate_user(login, password)
user = Gitlab::Auth.find_with_user_password(login, password)
unless user
user = oauth_access_token_check(login, password)
end
# 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
if 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
end
user
end
def git_cmd
if @request.get?
@request.params['service']
elsif @request.post?
File.basename(@request.path)
else
nil
end
end
def project
return @project if defined?(@project)
@project = project_by_path(@request.path_info)
end
def project_by_path(path)
if m = /^([\w\.\/-]+)\.git/.match(path).to_a
path_with_namespace = m.last
path_with_namespace.gsub!(/\.wiki$/, '')
path_with_namespace[0] = '' if path_with_namespace.start_with?('/')
Project.find_with_namespace(path_with_namespace)
end
end
def render_not_found
[404, { "Content-Type" => "text/plain" }, ["Not Found"]]
end
end
end
|
