GeezerVison is showing github.com — TextPatternCMS/textpattern/include/txp_auth.php at dev · forkdone/TextPatternCMS

Expand file tree

txp_auth.php

Copy path

More file actions

Latest commit

History

467 lines (412 loc) · 16.8 KB

txp_auth.php

Copy path

File metadata and controls

467 lines (412 loc) · 16.8 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

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

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

<?php

* Textpattern Content Management System

* https://textpattern.com/

* This file is part of Textpattern.

* Textpattern is free software; you can redistribute it and/or

* modify it under the terms of the GNU General Public License

* as published by the Free Software Foundation, version 2.

* Textpattern is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

* You should have received a copy of the GNU General Public License

* along with Textpattern. If not, see <https://www.gnu.org/licenses/>.

/**

* Login panel.

* @package Admin\Auth

if (!defined('TXPINTERFACE')) {

die('TXPINTERFACE is undefined.');

}

/**

* Renders a login panel if necessary.

* If the current visitor isn't authenticated,

* terminates the script and instead renders

* a login page.

* @access private

function doAuth()

{

global $txp_user;

$txp_user = null;

$message = doTxpValidate();

if (!$txp_user) {

if (trim(gps('app_mode')) == 'async') {

echo 'if (confirm("' . escape_js(gTxt('login_to_textpattern')) . '"))' . n .

'{window.location.assign("index.php")}';

exit();

} else {

set_cookie('txp_test_cookie', '1', array('expires' => 0, 'httponly' => false));

doLoginForm($message);

}

// Check that the request came from the same domain as the admin URL.

$dest = isset($_SERVER['HTTP_SEC_FETCH_DEST']) ? $_SERVER['HTTP_SEC_FETCH_DEST'] : '';

$mode = isset($_SERVER['HTTP_SEC_FETCH_MODE']) ? $_SERVER['HTTP_SEC_FETCH_MODE'] : '';

if ($dest !== 'document' || $mode !== 'navigate') {

$ref = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '';

if (!$ref || strpos($ref, ahu) !== 0) {

http_response_code(403);

exit;

}

ob_start();

}

/**

* Renders and outputs a login form.

* This function outputs a full HTML document,

* including <head> and footer.

* @param string|array $message The activity message

function doLoginForm($message)

{

global $textarray_script, $event, $step;

include txpath . '/lib/txplib_head.php';

$event = 'login';

$stay = (cs('txp_login') && !gps('logout') ? 1 : 0);

$lang = sanitizeForUrl(gps('lang'));

$reset = gps('reset');

$confirm = gps('confirm');

$activate = gps('activate');

if (gps('logout')) {

$step = 'logout';

} elseif ($reset) {

$step = 'reset';

} elseif ($activate) {

$step = 'activate';

} elseif ($confirm) {

$step = 'confirm';

}

$name = join(',', array_slice(explode(',', cs('txp_login')), 0, -1));

$out = array();

// Override language strings if indicated.

$txpLang = Txp::get('\Textpattern\L10n\Lang');

$installed = $txpLang->installed();

$lang = in_array($lang, $installed) ? $lang : LANG;

$langList = $txpLang->languageList();

$txpLang->swapStrings($lang, 'admin');

if ($reset) {

$pageTitle = gTxt('password_reset');

$out[] = hed(gTxt('password_reset'), 1, array('id' => 'txp-login-heading')) .

inputLabel(

'login_name',

fInput(

'text',

array(

'name' => 'p_userid',

'autocomplete' => 'username',

'autofocus' => true,

), $name, '', '', '', INPUT_REGULAR, '', 'login_name', false, true

'name', '', array('class' => 'txp-form-field login-name')

) .

graf(

fInput('submit', '', gTxt('password_reset_button'), 'publish')

) .

graf(

href(gTxt('back_to_login'), 'index.php?lang=' . $lang), array('class' => 'login-return')

) .

hInput('lang', $lang) .

hInput('p_reset', 1);

} elseif ($confirm || $activate) {

$pageTitle = ($confirm) ? gTxt('change_password') : gTxt('set_password');

$label = ($confirm) ? 'change_password' : 'set_password';

$class = ($confirm) ? 'change-password' : 'set-password';

$out[] = hed($pageTitle, 1, array('id' => 'txp-' . $class . '-heading')) .

inputLabel(

$label,

fInput(

'password',

array(

'name' => 'p_password',

'autocomplete' => 'new-password',

'autofocus' => true,

), '', 'txp-maskable', '', '', INPUT_REGULAR, '', $label, false, true

) .

n . tag(

checkbox('unmask', 1, false, 0, 'show_password') .

n . tag(gTxt('show_password'), 'label', array('for' => 'show_password')),

'div', array('class' => 'show-password')

'new_password', '', array('class' => 'txp-form-field ' . $class)

) .

graf(

fInput('submit', '', gTxt('password_confirm_button'), 'publish')

) .

($confirm ? graf(

href(gTxt('back_to_login'), 'index.php?lang=' . $lang), array('class' => 'login-return')

) : '') .

hInput('hash', gps('confirm') . gps('activate')) .

hInput('lang', $lang) .

hInput(($confirm ? 'p_alter' : 'p_set'), 1);

} else {

$pageTitle = gTxt('login');

$out[] = hed(gTxt('login_to_textpattern'), 1, array('id' => 'txp-login-heading')) .

(count($langList) > 1

? graf(

tag(gTxt('language'), 'label', array('for' => 'lang')) .

$txpLang->languageSelect('lang', $lang),

array('class' => 'login-language txp-reduced-ui')

) : hInput('lang', $lang)) .

inputLabel(

'login_name',

fInput(

'text',

array(

'name' => 'p_userid',

'autocomplete' => 'username',

'autofocus' => true,

), $name, '', '', '', INPUT_REGULAR, '', 'login_name', false, true

'name', '', array('class' => 'txp-form-field login-name')

) .

inputLabel(

'login_password',

fInput(

'password',

array(

'name' => 'p_password',

'autocomplete' => 'current-password',

), '', '', '', '', INPUT_REGULAR, '', 'login_password', false, true

'password', '', array('class' => 'txp-form-field login-password')

) .

graf(

checkbox('stay', 1, $stay, '', 'login_stay') . n .

tag(gTxt('stay_logged_in'), 'label', array('for' => 'login_stay')) .

popHelp(array('remember_login', $lang)), array('class' => 'login-stay')

) .

graf(

fInput('submit', '', gTxt('log_in_button'), 'publish')

) .

graf(

href(gTxt('password_forgotten'), '?reset=1&lang=' . $lang), array('class' => 'login-forgot')

) .

graf(

href(htmlspecialchars(get_pref('sitename')), hu), array('class' => 'login-view-site')

);

if (gps('event')) {

$out[] = eInput(gps('event'));

}

pagetop($pageTitle, $message);

echo form(

join('', $out), '', '', 'post', 'txp-login', '', 'login_form'

) .

script_js('textpattern.textarray = ' . json_encode($textarray_script, TEXTPATTERN_JSON)) .

n . '</main>' . n . '</body>' . n . '</html>';

exit(0);

}

/**

* Validates the sent login form and creates a session.

* During the reset request procedure, it is conceivable to verify the

* token as soon as it's presented in the URL, but that would:

* a) require refactoring code similarities in both p_confirm and p_alter branches

* b) require some way (e.g. an Exception) to signal back to doLoginForm() that

* the token is bogus so the 'change your password' form is not displayed.

* c) leak information about the validity of a token, thus allowing rapid brute-force

* attempts.

* The inconvenience of a real user following an expired token and being told so

* after they've set a password is a small price to pay for the improved security

* and reduction of attack surface that validating after submission affords.

* @todo Could the checks be done via a (reusable) Validator()?

* @return string A localised feedback message

* @see doLoginForm()

function doTxpValidate()

{

global $logout, $txp_user;

$p_userid = ps('p_userid');

$p_password = ps('p_password');

$p_reset = ps('p_reset');

$p_alter = ps('p_alter');

$p_set = ps('p_set');

$stay = ps('stay');

$p_confirm = gps('confirm');

$logout = gps('logout');

$lang = sanitizeForUrl(gps('lang'));

$message = '';

$pub_path = preg_replace('|//$|', '/', rhu . '/');

$cookie_domain = (defined('cookie_domain')) ? cookie_domain : '';

$conUsers = do_list_unique(get_pref('concurrent_logins'));

if (cs('txp_login') && strpos(cs('txp_login'), ',')) {

$txp_login = explode(',', cs('txp_login'));

$c_hash = end($txp_login);

$c_userid = join(',', array_slice($txp_login, 0, -1));

} else {

$c_hash = '';

$c_userid = '';

}

if ($c_userid && strlen($c_hash) === 32) {

// Cookie exists.

// @todo Improve security by using a better nonce/salt mechanism. md5 and uniqid are bad.

$r = safe_row(

"user_id, name, nonce",

'txp_users',

"name = '" . doSlash($c_userid) . "' AND last_access > DATE_SUB(NOW(), INTERVAL 30 DAY)"

);

if ($r && $r['nonce'] && $r['nonce'] === md5($c_userid . pack('H*', $c_hash))) {

// Cookie is good.

if (in_array($r['name'], $conUsers)) {

$set = array(

'reference_id' => $r['user_id'],

'type' => 'shared_login',

'selector' => substr($r['name'], 0, 12),

'token' => $c_hash,

);

// Use a (potentially insecure) server-side, shared c_hash.

$inset = join_qs(quote_list($set), ',');

safe_query("INSERT IGNORE INTO " .PFX."txp_token SET $inset");

}

if ($logout) {

$txp_user = $c_userid;

bouncer('logout', array('logout' => true));

$txp_user = null;

set_cookie('txp_login');

set_cookie('txp_login_public', '', array('path' => $pub_path, 'domain' => $cookie_domain));

// Destroy nonce.

safe_update(

'txp_users',

"nonce = '" . doSlash(md5(uniqid(mt_rand(), true))) . "'",

"name = '" . doSlash($c_userid) . "'"

);

assert_int($r['user_id']);

safe_delete(

'txp_token',

"type = 'shared_login' AND reference_id = " . $r['user_id']

);

} else {

// Create $txp_user.

$txp_user = $r['name'];

}

return $message;

} else {

txp_status_header('401 Your session has expired');

set_cookie('txp_login', $c_userid, array('expires' => time() + 3600 * 24 * 30));

set_cookie('txp_login_public', '', array('path' => $pub_path, 'domain' => $cookie_domain));

safe_delete(

'txp_token',

"type = 'shared_login' AND reference_id = " . $r['user_id']);

$message = array(gTxt('bad_cookie'), E_ERROR);

}

} elseif ($p_userid && $p_password) {

// Incoming login vars.

$name = txp_validate($p_userid, $p_password);

if ($name !== false) {

$c_hash = md5(uniqid(mt_rand(), true));

$nonce = md5($name . pack('H*', $c_hash));

if (in_array($name, $conUsers)) {

$row = safe_row('user_id, nonce', 'txp_users', "name = '" . doSlash($name) . "'");

assert_int($row['user_id']);

$stored_hash = safe_field('token', 'txp_token', "type='shared_login' AND reference_id = " . $row['user_id']);

if ($stored_hash) {

$c_hash = $stored_hash;

$nonce = $row['nonce'];

}

$set = array(

'reference_id' => $row['user_id'],

'type' => 'shared_login',

'selector' => substr($name, 0, 12),

'token' => $c_hash,

);

// Use a (potentially insecure) server-side, shared c_hash.

$inset = join_qs(quote_list($set), ',');

safe_query("INSERT IGNORE INTO " .PFX."txp_token SET $inset");

}

safe_update(

'txp_users',

"nonce = '" . doSlash($nonce) . "'",

"name = '" . doSlash($name) . "'"

);

set_cookie(

'txp_login',

$name . ',' . $c_hash,

array(

'expires' => $stay ? time() + 3600 * 24 * 30 : 0,

'httponly' => LOGIN_COOKIE_HTTP_ONLY

)

);

set_cookie(

'txp_login_public',

substr(md5($nonce), -10) . $name,

array(

'expires' => $stay ? time() + 3600 * 24 * 30 : 0,

'path' => $pub_path,

'domain' => $cookie_domain

)

);

// Login is good, create $txp_user.

$txp_user = $name;

Txp::get('\Textpattern\DB\Core')->checkPrefsIntegrity();

// Set admin language to the one set in the login screen.

if ($lang) {

set_pref('language_ui', $lang, 'admin', PREF_HIDDEN, 'text_input', 0, PREF_PRIVATE);

}

return '';

} else {

sleep(3);

txp_status_header('401 Could not log in with that username/password');

$message = array(gTxt('could_not_log_in'), E_ERROR);

}

} elseif ($p_reset) {

// Reset request.

sleep(3);

$message = ($p_userid) ? send_reset_confirmation_request($p_userid) : '';

} elseif ($p_alter || $p_set) {

// Password change/set confirmation.

sleep(3);

global $sitename;

$pass = ps('p_password');

$type = ($p_alter) ? 'password_reset' : 'account_activation';

if (trim($pass) === '') {

$message = array(gTxt('password_required'), E_ERROR);

} else {

$hash = gps('hash');

$selector = substr($hash, SALT_LENGTH);

$tokenInfo = safe_row("reference_id, token, expires", 'txp_token', "selector = '" . doSlash($selector) . "' AND type='$type'");

if ($tokenInfo) {

if (strtotime($tokenInfo['expires']) <= time()) {

$message = array(gTxt('token_expired'), E_ERROR);

} else {

$uid = assert_int($tokenInfo['reference_id']);

$row = safe_row("name, email, nonce, pass AS old_pass", 'txp_users', "user_id = '$uid'");

if ($row && $row['nonce'] && ($hash === Txp::get('\Textpattern\Security\Token')->constructHash($selector, $row['old_pass'], $row['nonce']) . $selector)) {

if (change_user_password($row['name'], $pass)) {

$body = gTxt('salutation', array('{name}' => $row['name'])) .

n . n . ($p_alter ? gTxt('password_change_confirmation') : gTxt('password_set_confirmation') . n . n . gTxt('log_in_at') . ' ' . ahu . 'index.php?lang=' . $lang);

$message = ($p_alter) ? gTxt('password_changed') : gTxt('password_set');

txpMail($row['email'], "[$sitename] " . $message, $body);

// Invalidate all tokens in the wild for this user.

safe_delete("txp_token", "reference_id = '$uid' AND type IN ('password_reset', 'account_activation')");

}

} else {

$message = array(gTxt('invalid_token'), E_ERROR);

}

} else {

$message = array(gTxt('invalid_token'), E_ERROR);

}

$txp_user = '';

return $message;

}