mod/dfrn_request.php

   1 <?php
   2
   3 if(! function_exists('dfrn_request_init')) {
   4 function dfrn_request_init(&$a) {
   5
   6         if($a->argc > 1)
   7                 $which = $a->argv[1];
   8
   9         require_once('mod/profile.php');
  10         profile_init($a,$which);
  11
  12         return;
  13 }}
  14
  15
  16 if(! function_exists('dfrn_request_post')) {
  17 function dfrn_request_post(&$a) {
  18
  19         if(($a->argc != 2) || (! count($a->profile)))
  20                 return;
  21
  22
  23         if($_POST['cancel']) {
  24                 goaway($a->get_baseurl());
  25         }
  26
  27
  28         // We've introduced ourself to another cell, then have been returned to our own cell
  29         // to confirm the request, and then we've clicked submit (perhaps after logging in).
  30         // That brings us here:
  31
  32         if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)) {
  33
  34                 // Ensure this is a valid request
  35
  36                 if(local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) {
  37
  38
  39                         $dfrn_url = notags(trim($_POST['dfrn_url']));
  40                         $aes_allow = (((x($_POST,'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
  41                         $confirm_key = ((x($_POST,'confirm_key')) ? $_POST['confirm_key'] : "");
  42
  43                         $contact_record = null;
  44
  45                         if(x($dfrn_url)) {
  46
  47                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' LIMIT 1",
  48                                         intval(get_uid()),
  49                                         dbesc($dfrn_url)
  50                                 );
  51
  52                                 if(count($r)) {
  53                                         if(strlen($r[0]['dfrn-id'])) {
  54                                                 notice( t("This introduction has already been accepted.") . EOL );
  55                                                 return;
  56                                         }
  57                                         else
  58                                                 $contact_record = $r[0];
  59                                 }
  60
  61                                 if(is_array($contact_record)) {
  62                                         $r = q("UPDATE `contact` SET `ret-aes` = %d WHERE `id` = %d LIMIT 1",
  63                                                 intval($aes_allow),
  64                                                 intval($contact_record['id'])
  65                                         );
  66                                 }
  67                                 else {
  68
  69                                         require_once('Scrape.php');
  70
  71
  72                                         $parms = scrape_dfrn($dfrn_url);
  73
  74                                         if(! count($parms)) {
  75                                                 notice( t('Profile location is not valid or does not contain profile information.') . EOL );
  76                                                 return;
  77                                         }
  78                                         else {
  79                                                 if(! x($parms,'fn'))
  80                                                         notice( t('Warning: profile location has no identifiable owner name.') . EOL );
  81                                                 if(! x($parms,'photo'))
  82                                                         notice( t('Warning: profile location has no profile photo.') . EOL );
  83                                                 $invalid = validate_dfrn($parms);
  84                                                 if($invalid) {
  85                                                         notice( $invalid . t(' required parameter')
  86                                                                 . (($invalid == 1) ? t(" was ") : t("s were ") )
  87                                                                 . t("not found at the given location.") . EOL ) ;
  88                                                         return;
  89                                                 }
  90                                         }
  91
  92
  93
  94                                         $dfrn_request = $parms['dfrn-request'];
  95
  96                                         dbesc_array($parms);
  97
  98
  99                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `name`, `photo`, `site-pubkey`,
 100                                                 `request`, `confirm`, `notify`, `poll`, `aes_allow`)
 101                                                 VALUES ( %d, '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', %d)",
 102                                                 intval(get_uid()),
 103                                                 datetime_convert(),
 104                                                 dbesc($dfrn_url),
 105                                                 $parms['fn'],
 106                                                 $parms['photo'],
 107                                                 $parms['key'],
 108                                                 $parms['dfrn-request'],
 109                                                 $parms['dfrn-confirm'],
 110                                                 $parms['dfrn-notify'],
 111                                                 $parms['dfrn-poll'],
 112                                                 intval($aes_allow)
 113                                         );
 114                                 }
 115
 116                                 if($r) {
 117                                         notice( t("Introduction complete.") . EOL);
 118                                 }
 119
 120                                 // Allow the blocked remote notification to complete
 121
 122                                 if(is_array($contact_record))
 123                                         $dfrn_request = $contact_record['request'];
 124
 125                                 if(strlen($dfrn_request) && strlen($confirm_key))
 126                                         $s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
 127                                         // ignore reply
 128                                 goaway($dfrn_url);
 129                                 return; // NOTREACHED
 130
 131                         }
 132
 133                 }
 134
 135                 // invalid/bogus request
 136
 137                 notice( t('Unrecoverable protocol error.') . EOL );
 138                 goaway($a->get_baseurl());
 139                 return; // NOTREACHED
 140         }
 141
 142         // Otherwise:
 143
 144         // We are the requestee. A person from a remote cell has made an introduction
 145         // on our profile web page and clicked submit. We will use their DFRN-URL to
 146         // figure out how to contact their cell.
 147
 148         // Scrape the originating DFRN-URL for everything we need. Create a contact record
 149         // and an introduction to show our user next time he/she logs in.
 150         // Finally redirect back to the requestor so that their site can record the request.
 151         // If our user (the requestee) later confirms this request, a record of it will need
 152         // to exist on the requestor's cell in order for the confirmation process to complete..
 153
 154         // It's possible that neither the requestor or the requestee are logged in at the moment,
 155         // and the requestor does not yet have any credentials to the requestee profile.
 156
 157         // Who is the requestee? We've already loaded their profile which means their nickname should be
 158         // in $a->argv[1] and we should have their complete info in $a->profile.
 159
 160         if(! (is_array($a->profile) && count($a->profile))) {
 161                 notice( t('Profile unavailable.') . EOL);
 162                 return;
 163         }
 164
 165         $nickname = $a->profile['nickname'];
 166         $notify_flags = $a->profile['notify-flags'];
 167         $uid = $a->profile['uid'];
 168
 169         $contact_record = null;
 170         $failed = false;
 171         $parms = null;
 172
 173
 174         if( x($_POST,'dfrn_url')) {
 175
 176                 $url = trim($_POST['dfrn_url']);
 177                 if(! strlen($url)) {
 178                         notice( t("Invalid locator") . EOL );
 179                         return;
 180                 }
 181
 182                 // Canonicalise email-style profile locator
 183
 184                 $url = webfinger_dfrn($url);
 185
 186                 if(substr($url,0,5) === 'stat:') {
 187                         $network = 'stat';
 188                         $url = substr($url,5);
 189                 }
 190                 else {
 191                         $network = 'dfrn';
 192                 }
 193
 194                 if(! strlen($url)) {
 195                         notice( t("Unable to resolve your name at the provided location.") . EOL);
 196                         return;
 197                 }
 198
 199
 200                 if($network === 'dfrn') {
 201                         $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' LIMIT 1",
 202                                 intval($uid),
 203                                 dbesc($url)
 204                         );
 205
 206                         if(count($ret)) {
 207                                 if(strlen($ret[0]['issued-id'])) {
 208                                         notice( t('You have already introduced yourself here.') . EOL );
 209                                         return;
 210                                 }
 211                                 else {
 212                                         $contact_record = $ret[0];
 213                                         $parms = array('dfrn-request' => $ret[0]['request']);
 214                                 }
 215                         }
 216                         $issued_id = random_string();
 217
 218                         if(is_array($contact_record)) {
 219                                 // There is a contact record but no issued-id, so this
 220                                 // is a reciprocal introduction from a known contact
 221                                 $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d LIMIT 1",
 222                                         dbesc($issued_id),
 223                                         intval($contact_record['id'])
 224                                 );
 225                         }
 226                         else {
 227                                 if(! validate_url($url)) {
 228                                         notice( t('Invalid profile URL.') . EOL);
 229                                         goaway($a->get_baseurl() . '/' . $a->cmd);
 230                                         return; // NOTREACHED
 231                                 }
 232
 233                                 if(! allowed_url($url)) {
 234                                         notice( t('Disallowed profile URL.') . EOL);
 235                                         goaway($a->get_baseurl() . '/' . $a->cmd);
 236                                         return; // NOTREACHED
 237                                 }
 238
 239
 240                                 require_once('Scrape.php');
 241
 242                                 $parms = scrape_dfrn($url);
 243
 244                                 if(! count($parms)) {
 245                                         notice( t('Profile location is not valid or does not contain profile information.') . EOL );
 246                                         goaway($a->get_baseurl() . '/' . $a->cmd);
 247                                 }
 248                                 else {
 249                                         if(! x($parms,'fn'))
 250                                                 notice( t('Warning: profile location has no identifiable owner name.') . EOL );
 251                                         if(! x($parms,'photo'))
 252                                                 notice( t('Warning: profile location has no profile photo.') . EOL );
 253                                         $invalid = validate_dfrn($parms);
 254                                         if($invalid) {
 255                                                 notice( $invalid . t(' required parameter')
 256                                                         . (($invalid == 1) ? t(" was ") : t("s were ") )
 257                                                         . t("not found at the given location.") . EOL ) ;
 258
 259                                                 return;
 260                                         }
 261                                 }
 262
 263
 264                                 $parms['url'] = $url;
 265                                 $parms['issued-id'] = $issued_id;
 266
 267
 268                                 dbesc_array($parms);
 269                                 $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `name`, `issued-id`, `photo`, `site-pubkey`,
 270                                         `request`, `confirm`, `notify`, `poll` )
 271                                         VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )",
 272                                         intval($uid),
 273                                         datetime_convert(),
 274                                         $parms['url'],
 275                                         $parms['fn'],
 276                                         $parms['issued-id'],
 277                                         $parms['photo'],
 278                                         $parms['key'],
 279                                         $parms['dfrn-request'],
 280                                         $parms['dfrn-confirm'],
 281                                         $parms['dfrn-notify'],
 282                                         $parms['dfrn-poll']
 283                                 );
 284
 285                                 // find the contact record we just created
 286                                 if($r) {
 287                                         $r = q("SELECT `id` FROM `contact`
 288                                                 WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
 289                                                 intval($uid),
 290                                                 $parms['url'],
 291                                                 $parms['issued-id']
 292                                         );
 293                                         if(count($r))
 294                                                 $contact_record = $r[0];
 295                                 }
 296
 297                         }
 298                         if($r === false) {
 299                                 notice( t('Failed to update contact record.') . EOL );
 300                                 return;
 301                         }
 302
 303                         $hash = random_string() . (string) time();   // Generate a confirm_key
 304
 305                         if(is_array($contact_record)) {
 306                                 $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 307                                         VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 308                                         intval($uid),
 309                                         intval($contact_record['id']),
 310                                         ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 311                                         dbesc(notags(trim($_POST['dfrn-request-message']))),
 312                                         dbesc($hash),
 313                                         dbesc(datetime_convert())
 314                                 );
 315                         }
 316
 317
 318                         // This notice will only be seen by the requestor if  the requestor and requestee are on the same server.
 319
 320                         if(! $failed)
 321                                 notice( t('Your introduction has been sent.') . EOL );
 322
 323                         // "Homecoming" - send the requestor back to their site to record the introduction.
 324
 325                         $dfrn_url = bin2hex($a->get_baseurl() . '/profile/' . $nickname);
 326                         $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 327
 328                         goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url"
 329                                 . '&dfrn_version=' . DFRN_PROTOCOL_VERSION
 330                                 . '&confirm_key='  . $hash
 331                                 . (($aes_allow) ? "&aes_allow=1" : "")
 332                         );
 333                         // NOTREACHED
 334                         // END $network === 'dfrn'
 335                 }
 336                 elseif($network === 'stat') {
 337
 338                         /**
 339                         *
 340                         * OStatus network
 341                         * Check contact existence
 342                         * Try and scrape together enough information to create a contact record, with us as REL_VIP
 343                         * Substitute our user's feed URL into $url template
 344                         * Send the subscriber home to subscribe
 345                         *
 346                         **/
 347
 348                         $url = str_replace('{uri}', $a->get_baseurl() . '/dfrn_poll/' . $nickname, $url);
 349                         goaway($url);
 350                         // NOTREACHED
 351                         // END $network === 'stat'
 352                 }
 353
 354         }       return;
 355 }}
 356
 357
 358
 359
 360 if(! function_exists('dfrn_request_content')) {
 361 function dfrn_request_content(&$a) {
 362
 363
 364
 365         if(($a->argc != 2) || (! count($a->profile)))
 366                 return "";
 367
 368         $a->page['template'] = 'profile';
 369
 370         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 371         // to send us to the post section to record the introduction.
 372
 373         if(x($_GET,'dfrn_url')) {
 374
 375                 if(! local_user()) {
 376                         notice( t("Please login to confirm introduction.") . EOL );
 377                         return login();
 378                 }
 379
 380                 // Edge case, but can easily happen in the wild. This person is authenticated,
 381                 // but not as the person who needs to deal with this request.
 382
 383                 if ($a->user['nickname'] != $a->argv[1]) {
 384                         notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
 385                         return login();
 386                 }
 387
 388                 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
 389                 $aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
 390                 $confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
 391                 $o .= load_view_file("view/dfrn_req_confirm.tpl");
 392                 $o  = replace_macros($o,array(
 393                         '$dfrn_url' => $dfrn_url,
 394                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 395                         '$confirm_key' => $confirm_key,
 396                         '$username' => $a->user['username'],
 397                         '$uid' => $_SESSION['uid'],
 398                         '$nickname' => $a->user['nickname'],
 399                         'dfrn_rawurl' => $_GET['dfrn_url']
 400                         ));
 401                 return $o;
 402
 403         }
 404         elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) {
 405
 406                 // we are the requestee and it is now safe to send our user their introduction,
 407                 // We could just unblock it, but first we have to jump through a few hoops to
 408                 // send an email, or even to find out if we need to send an email.
 409
 410                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 411                         dbesc($_GET['confirm_key'])
 412                 );
 413
 414                 if(count($intro)) {
 415
 416                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 417                                 WHERE `contact`.`id` = %d LIMIT 1",
 418                                 intval($intro[0]['contact-id'])
 419                         );
 420                         if(count($r)) {
 421
 422                                 if($r[0]['notify-flags'] & NOTIFY_INTRO) {
 423                                         $email_tpl = load_view_file('view/request_notify_eml.tpl');
 424                                         $email = replace_macros($email_tpl, array(
 425                                                 '$requestor' => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 426                                                 '$url' => stripslashes($r[0]['url']),
 427                                                 '$myname' => $r[0]['username'],
 428                                                 '$siteurl' => $a->get_baseurl(),
 429                                                 '$sitename' => $a->config['sitename']
 430                                         ));
 431                                         $res = mail($r[0]['email'],
 432                                                 t("Introduction received at ") . $a->config['sitename'],
 433                                                 $email,
 434                                                 'From: ' . t('Administrator') . '@' . $_SERVER[SERVER_NAME] );
 435                                         // This is a redundant notification - no point throwing errors if it fails.
 436                                 }
 437                         }
 438
 439                         $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s' LIMIT 1",
 440                                 dbesc($_GET['confirm_key'])
 441                         );
 442
 443                 }
 444                 killme();
 445                 return; // NOTREACHED
 446         }
 447         else {
 448
 449                 // Normal web request. Display our user's introduction form.
 450
 451                 $o = load_view_file("view/dfrn_request.tpl");
 452                 $o = replace_macros($o,array('$nickname' => $a->argv[1]));
 453                 return $o;
 454         }
 455
 456         return; // Somebody is fishing.
 457 }}