author | Matthew Wild <mwild1@gmail.com> |
Sun, 28 Aug 2022 11:18:10 +0100 | |
changeset 5024 | 6a36dae4a88d |
parent 3228 | b7aa8630438e |
permissions | -rw-r--r-- |
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1 |
-- Prosody IM |
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-- Copyright (C) 2008-2013 Matthew Wild |
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-- Copyright (C) 2008-2013 Waqas Hussain |
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-- Copyright (C) 2014 Kim Alvefur |
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-- |
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-- This project is MIT/X11 licensed. Please see the |
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-- COPYING file in the source package for more information. |
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-- |
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local new_sasl = require "util.sasl".new; |
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local base64 = require "util.encodings".base64.encode; |
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local have_async, async = pcall(require, "util.async"); |
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local nodeprep = require "util.encodings".stringprep.nodeprep; |
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local log = module._log; |
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local host = module.host; |
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local password_auth_url = module:get_option_string("http_auth_url", ""):gsub("$host", host); |
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local cookie_auth_url = module:get_option_string("http_cookie_auth_url"); |
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if cookie_auth_url then |
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cookie_auth_url = cookie_auth_url:gsub("$host", host); |
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end |
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local external_needs_authzid = cookie_auth_url and cookie_auth_url:match("$user"); |
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if password_auth_url == "" and not cookie_auth_url then error("http_auth_url or http_cookie_auth_url required") end |
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local provider = {}; |
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-- globals required by socket.http |
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if rawget(_G, "PROXY") == nil then |
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rawset(_G, "PROXY", false) |
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end |
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if rawget(_G, "base_parsed") == nil then |
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rawset(_G, "base_parsed", false) |
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end |
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if not have_async then -- FINE! Set your globals then |
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prosody.unlock_globals() |
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require "ltn12" |
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require "socket" |
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require "socket.http" |
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require "ssl.https" |
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prosody.lock_globals() |
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end |
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local function async_http_request(url, headers) |
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module:log("debug", "async_http_auth()"); |
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local http = require "net.http"; |
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local wait, done = async.waiter(); |
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local content, code, request, response; |
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local ex = { |
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headers = headers; |
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} |
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local function cb(content_, code_, request_, response_) |
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content, code, request, response = content_, code_, request_, response_; |
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done(); |
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end |
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http.request(url, ex, cb); |
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wait(); |
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log("debug", "response code %s", tostring(code)); |
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if code >= 200 and code <= 299 then |
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return true, content; |
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end |
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return nil; |
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end |
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local function sync_http_request(url, headers) |
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module:log("debug", "sync_http_auth()"); |
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require "ltn12"; |
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local http = require "socket.http"; |
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local https = require "ssl.https"; |
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local request; |
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if string.sub(url, 1, string.len('https')) == 'https' then |
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request = https.request; |
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else |
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request = http.request; |
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end |
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local body_chunks = {}; |
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local _, code, headers, status = request{ |
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url = url, |
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84 |
headers = headers; |
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85 |
sink = ltn12.sink.table(body_chunks); |
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}; |
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87 |
log("debug", "response code %s %s", type(code), tostring(code)); |
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if type(code) == "number" and code >= 200 and code <= 299 then |
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89 |
log("debug", "success") |
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return true, table.concat(body_chunks); |
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91 |
end |
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return nil; |
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93 |
end |
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95 |
local http_request = have_async and async_http_request or sync_http_request; |
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97 |
function http_test_password(username, password) |
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98 |
local url = password_auth_url:gsub("$user", username):gsub("$password", password); |
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99 |
log("debug", "Testing password for user %s at host %s with URL %s", username, host, url); |
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100 |
local ok = (http_request(url, { Authorization = "Basic "..base64(username..":"..password); })); |
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101 |
if not ok then |
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102 |
return nil, "not authorized"; |
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103 |
end |
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104 |
return true; |
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105 |
end |
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106 |
|
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107 |
function http_test_cookie(cookie, username) |
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108 |
local url = external_needs_authzid and cookie_auth_url:gsub("$user", username) or cookie_auth_url; |
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109 |
log("debug", "Testing cookie auth for user %s at host %s with URL %s", username or "<unknown>", host, url); |
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110 |
local ok, resp = http_request(url, { Cookie = cookie; }); |
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111 |
if not ok then |
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112 |
return nil, "not authorized"; |
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113 |
end |
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114 |
|
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115 |
return external_needs_authzid or resp; |
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116 |
end |
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117 |
|
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118 |
function provider.test_password(username, password) |
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119 |
return http_test_password(username, password); |
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120 |
end |
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121 |
|
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122 |
function provider.users() |
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123 |
return function() |
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124 |
return nil; |
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125 |
end |
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126 |
end |
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127 |
|
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128 |
function provider.set_password(username, password) |
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129 |
return nil, "Changing passwords not supported"; |
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130 |
end |
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131 |
|
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132 |
function provider.user_exists(username) |
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133 |
return true; |
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134 |
end |
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135 |
|
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136 |
function provider.create_user(username, password) |
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137 |
return nil, "User creation not supported"; |
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138 |
end |
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139 |
|
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140 |
function provider.delete_user(username) |
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141 |
return nil , "User deletion not supported"; |
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142 |
end |
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143 |
|
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144 |
local function get_session_cookies(session) |
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145 |
local request = session.websocket_request; -- WebSockets |
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146 |
if not request and session.requests then -- BOSH |
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147 |
request = session.requests[1]; |
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148 |
end |
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|
149 |
if not request and session.conn._http_open_response then -- Fallback BOSH |
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|
150 |
local response = session.conn._http_open_response; |
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|
151 |
request = response and response.request; |
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152 |
end |
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153 |
if request then |
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154 |
return request.headers.cookie; |
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155 |
end |
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|
156 |
end |
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|
157 |
|
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|
158 |
function provider.get_sasl_handler(session) |
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|
159 |
local cookie = cookie_auth_url and get_session_cookies(session); |
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|
160 |
log("debug", "Request cookie: %s", cookie); |
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|
161 |
return new_sasl(host, { |
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|
162 |
plain_test = function(sasl, username, password, realm) |
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|
163 |
return provider.test_password(username, password), true; |
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164 |
end; |
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|
165 |
external = cookie and function (authzid) |
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|
166 |
if external_needs_authzid then |
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|
167 |
-- Authorize the username provided by the client, using request cookie |
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|
168 |
if authzid ~= "" then |
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|
169 |
module:log("warn", "Client requested authzid, but cookie auth URL does not contain $user variable"); |
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|
170 |
return nil; |
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|
171 |
end |
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|
172 |
local success = http_test_cookie(cookie); |
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|
173 |
if not success then |
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|
174 |
return nil; |
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|
175 |
end |
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|
176 |
return nodeprep(authzid), true; |
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|
177 |
else |
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|
178 |
-- Authorize client using request cookie, username comes from auth server |
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|
179 |
if authzid == "" then |
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|
180 |
module:log("warn", "Client did not provide authzid, but cookie auth URL contains $user variable"); |
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|
181 |
return nil; |
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|
182 |
end |
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|
183 |
local unprepped_username = http_test_cookie(cookie, nodeprep(authzid)); |
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|
184 |
local username = nodeprep(unprepped_username); |
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|
185 |
if not username then |
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|
186 |
if unprepped_username then |
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|
187 |
log("warn", "Username supplied by cookie_auth_url is not valid for XMPP"); |
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|
188 |
end |
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|
189 |
return nil; |
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|
190 |
end |
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|
191 |
return username, true; |
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|
192 |
end; |
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|
193 |
end; |
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|
194 |
}); |
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|
195 |
end |
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|
196 |
|
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|
197 |
module:provides("auth", provider); |