mod/dfrn_confirm.php

   1 <?php
   2
   3 /*
   4  * Module: dfrn_confirm
   5  * Purpose: Friendship acceptance for DFRN contacts
   6  *
   7  * There are two possible entry points and three scenarios.
   8  *
   9  *   1. A form was submitted by our user approving a friendship that originated elsewhere.
  10  *      This may also be called from dfrn_request to automatically approve a friendship.
  11  *
  12  *   2. We may be the target or other side of the conversation to scenario 1, and will
  13  *      interact with that process on our own user's behalf.
  14  *
  15  */
  16
  17 require_once('include/enotify.php');
  18 require_once('include/group.php');
  19
  20 function dfrn_confirm_post(&$a,$handsfree = null) {
  21
  22         if(is_array($handsfree)) {
  23
  24                 /**
  25                  * We were called directly from dfrn_request due to automatic friend acceptance.
  26                  * Any $_POST parameters we may require are supplied in the $handsfree array.
  27                  *
  28                  */
  29
  30                 $node = $handsfree['node'];
  31                 $a->interactive = false; // notice() becomes a no-op since nobody is there to see it
  32
  33         }
  34         else {
  35                 if($a->argc > 1)
  36                         $node = $a->argv[1];
  37         }
  38
  39                 /**
  40                  *
  41                  * Main entry point. Scenario 1. Our user received a friend request notification (perhaps
  42                  * from another site) and clicked 'Approve'.
  43                  * $POST['source_url'] is not set. If it is, it indicates Scenario 2.
  44                  *
  45                  * We may also have been called directly from dfrn_request ($handsfree != null) due to
  46                  * this being a page type which supports automatic friend acceptance. That is also Scenario 1
  47                  * since we are operating on behalf of our registered user to approve a friendship.
  48                  *
  49                  */
  50
  51         if(! x($_POST,'source_url')) {
  52
  53                 $uid = ((is_array($handsfree)) ? $handsfree['uid'] : local_user());
  54
  55                 if(! $uid) {
  56                         notice( t('Permission denied.') . EOL );
  57                         return;
  58                 }
  59
  60                 $user = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
  61                         intval($uid)
  62                 );
  63
  64                 if(! $user) {
  65                         notice( t('Profile not found.') . EOL );
  66                         return;
  67                 }
  68
  69
  70                 // These data elements may come from either the friend request notification form or $handsfree array.
  71
  72                 if(is_array($handsfree)) {
  73                         logger('Confirm in handsfree mode');
  74                         $dfrn_id   = $handsfree['dfrn_id'];
  75                         $intro_id  = $handsfree['intro_id'];
  76                         $duplex    = $handsfree['duplex'];
  77                         $hidden    = ((array_key_exists('hidden',$handsfree)) ? intval($handsfree['hidden']) : 0 );
  78                         $activity  = ((array_key_exists('activity',$handsfree)) ? intval($handsfree['activity']) : 0 );
  79                 }
  80                 else {
  81                         $dfrn_id  = ((x($_POST,'dfrn_id'))    ? notags(trim($_POST['dfrn_id'])) : "");
  82                         $intro_id = ((x($_POST,'intro_id'))   ? intval($_POST['intro_id'])      : 0 );
  83                         $duplex   = ((x($_POST,'duplex'))     ? intval($_POST['duplex'])        : 0 );
  84                         $cid      = ((x($_POST,'contact_id')) ? intval($_POST['contact_id'])    : 0 );
  85                         $hidden   = ((x($_POST,'hidden'))     ? intval($_POST['hidden'])        : 0 );
  86                         $activity = ((x($_POST,'activity'))   ? intval($_POST['activity'])      : 0 );
  87                 }
  88
  89                 /**
  90                  *
  91                  * Ensure that dfrn_id has precedence when we go to find the contact record.
  92                  * We only want to search based on contact id if there is no dfrn_id,
  93                  * e.g. for OStatus network followers.
  94                  *
  95                  */
  96
  97                 if(strlen($dfrn_id))
  98                         $cid = 0;
  99
 100                 logger('Confirming request for dfrn_id (issued) ' . $dfrn_id);
 101                 if($cid)
 102                         logger('Confirming follower with contact_id: ' . $cid);
 103
 104
 105                 /**
 106                  *
 107                  * The other person will have been issued an ID when they first requested friendship.
 108                  * Locate their record. At this time, their record will have both pending and blocked set to 1.
 109                  * There won't be any dfrn_id if this is a network follower, so use the contact_id instead.
 110                  *
 111                  */
 112
 113                 $r = q("SELECT * FROM `contact` WHERE ( ( `issued-id` != '' AND `issued-id` = '%s' ) OR ( `id` = %d AND `id` != 0 ) ) AND `uid` = %d AND `duplex` = 0 LIMIT 1",
 114                         dbesc($dfrn_id),
 115                         intval($cid),
 116                         intval($uid)
 117                 );
 118
 119                 if(! count($r)) {
 120                         logger('Contact not found in DB.');
 121                         notice( t('Contact not found.') . EOL );
 122                         notice( t('This may occasionally happen if contact was requested by both persons and it has already been approved.') . EOL );
 123                         return;
 124                 }
 125
 126                 $contact = $r[0];
 127
 128                 $contact_id   = $contact['id'];
 129                 $relation     = $contact['rel'];
 130                 $site_pubkey  = $contact['site-pubkey'];
 131                 $dfrn_confirm = $contact['confirm'];
 132                 $aes_allow    = $contact['aes_allow'];
 133
 134                 $network = ((strlen($contact['issued-id'])) ? NETWORK_DFRN : NETWORK_OSTATUS);
 135
 136                 if($contact['network'])
 137                         $network = $contact['network'];
 138
 139                 if($network === NETWORK_DFRN) {
 140
 141                         /**
 142                          *
 143                          * Generate a key pair for all further communications with this person.
 144                          * We have a keypair for every contact, and a site key for unknown people.
 145                          * This provides a means to carry on relationships with other people if
 146                          * any single key is compromised. It is a robust key. We're much more
 147                          * worried about key leakage than anybody cracking it.
 148                          *
 149                          */
 150                         require_once('include/crypto.php');
 151
 152                         $res = new_keypair(4096);
 153
 154
 155                         $private_key = $res['prvkey'];
 156                         $public_key  = $res['pubkey'];
 157
 158                         // Save the private key. Send them the public key.
 159
 160                         $r = q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d",
 161                                 dbesc($private_key),
 162                                 intval($contact_id),
 163                                 intval($uid)
 164                         );
 165
 166                         $params = array();
 167
 168                         /**
 169                          *
 170                          * Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our
 171                          * site private key (person on the other end can decrypt it with our site public key).
 172                          * Then encrypt our profile URL with the other person's site public key. They can decrypt
 173                          * it with their site private key. If the decryption on the other end fails for either
 174                          * item, it indicates tampering or key failure on at least one site and we will not be
 175                          * able to provide a secure communication pathway.
 176                          *
 177                          * If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3
 178                          * or later) then we encrypt the personal public key we send them using AES-256-CBC and a
 179                          * random key which is encrypted with their site public key.
 180                          *
 181                          */
 182
 183                         $src_aes_key = random_string();
 184
 185                         $result = '';
 186                         openssl_private_encrypt($dfrn_id,$result,$user[0]['prvkey']);
 187
 188                         $params['dfrn_id'] = bin2hex($result);
 189                         $params['public_key'] = $public_key;
 190
 191
 192                         $my_url = $a->get_baseurl() . '/profile/' . $user[0]['nickname'];
 193
 194                         openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
 195                         $params['source_url'] = bin2hex($params['source_url']);
 196
 197                         if($aes_allow && function_exists('openssl_encrypt')) {
 198                                 openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
 199                                 $params['aes_key'] = bin2hex($params['aes_key']);
 200                                 $params['public_key'] = bin2hex(openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key));
 201                         }
 202
 203                         $params['dfrn_version'] = DFRN_PROTOCOL_VERSION ;
 204                         if($duplex == 1)
 205                                 $params['duplex'] = 1;
 206
 207                         if($user[0]['page-flags'] == PAGE_COMMUNITY)
 208                                 $params['page'] = 1;
 209                         if($user[0]['page-flags'] == PAGE_PRVGROUP)
 210                                 $params['page'] = 2;
 211
 212                         logger('Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA);
 213
 214                         /**
 215                          *
 216                          * POST all this stuff to the other site.
 217                          * Temporarily raise the network timeout to 120 seconds because the default 60
 218                          * doesn't always give the other side quite enough time to decrypt everything.
 219                          *
 220                          */
 221
 222                         $a->config['system']['curl_timeout'] = 120;
 223
 224                         $res = post_url($dfrn_confirm,$params);
 225
 226                         logger(' Confirm: received data: ' . $res, LOGGER_DATA);
 227
 228                         // Now figure out what they responded. Try to be robust if the remote site is
 229                         // having difficulty and throwing up errors of some kind.
 230
 231                         $leading_junk = substr($res,0,strpos($res,'<?xml'));
 232
 233                         $res = substr($res,strpos($res,'<?xml'));
 234                         if(! strlen($res)) {
 235
 236                                         // No XML at all, this exchange is messed up really bad.
 237                                         // We shouldn't proceed, because the xml parser might choke,
 238                                         // and $status is going to be zero, which indicates success.
 239                                         // We can hardly call this a success.
 240
 241                                 notice( t('Response from remote site was not understood.') . EOL);
 242                                 return;
 243                         }
 244
 245                         if(strlen($leading_junk) && get_config('system','debugging')) {
 246
 247                                         // This might be more common. Mixed error text and some XML.
 248                                         // If we're configured for debugging, show the text. Proceed in either case.
 249
 250                                 notice( t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL );
 251                         }
 252
 253                         if(stristr($res, "<status")===false) {
 254                                 // wrong xml! stop here!
 255                                 notice( t('Unexpected response from remote site: ') . EOL . htmlspecialchars($res) . EOL );
 256                                 return;
 257                         }
 258
 259                         $xml = parse_xml_string($res);
 260                         $status = (int) $xml->status;
 261                         $message = unxmlify($xml->message);   // human readable text of what may have gone wrong.
 262                         switch($status) {
 263                                 case 0:
 264                                         info( t("Confirmation completed successfully.") . EOL);
 265                                         if(strlen($message))
 266                                                 notice( t('Remote site reported: ') . $message . EOL);
 267                                         break;
 268                                 case 1:
 269                                         // birthday paradox - generate new dfrn-id and fall through.
 270                                         $new_dfrn_id = random_string();
 271                                         $r = q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d",
 272                                                 dbesc($new_dfrn_id),
 273                                                 intval($contact_id),
 274                                                 intval($uid)
 275                                         );
 276
 277                                 case 2:
 278                                         notice( t("Temporary failure. Please wait and try again.") . EOL);
 279                                         if(strlen($message))
 280                                                 notice( t('Remote site reported: ') . $message . EOL);
 281                                         break;
 282
 283
 284                                 case 3:
 285                                         notice( t("Introduction failed or was revoked.") . EOL);
 286                                         if(strlen($message))
 287                                                 notice( t('Remote site reported: ') . $message . EOL);
 288                                         break;
 289                                 }
 290
 291                         if(($status == 0) && ($intro_id)) {
 292
 293                                 // Success. Delete the notification.
 294
 295                                 $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 296                                         intval($intro_id),
 297                                         intval($uid)
 298                                 );
 299
 300                         }
 301
 302                         if($status != 0)
 303                                 return;
 304                 }
 305
 306
 307                 /*
 308                  *
 309                  * We have now established a relationship with the other site.
 310                  * Let's make our own personal copy of their profile photo so we don't have
 311                  * to always load it from their site.
 312                  *
 313                  * We will also update the contact record with the nature and scope of the relationship.
 314                  *
 315                  */
 316
 317                 require_once('include/Photo.php');
 318
 319                 update_contact_avatar($contact['photo'],$uid,$contact_id);
 320
 321                 logger('dfrn_confirm: confirm - imported photos');
 322
 323                 if($network === NETWORK_DFRN) {
 324
 325                         $new_relation = CONTACT_IS_FOLLOWER;
 326                         if(($relation == CONTACT_IS_SHARING) || ($duplex))
 327                                 $new_relation = CONTACT_IS_FRIEND;
 328
 329                         if(($relation == CONTACT_IS_SHARING) && ($duplex))
 330                                 $duplex = 0;
 331
 332                         $r = q("UPDATE `contact` SET `rel` = %d,
 333                                 `name-date` = '%s',
 334                                 `uri-date` = '%s',
 335                                 `blocked` = 0,
 336                                 `pending` = 0,
 337                                 `duplex` = %d,
 338                                 `hidden` = %d,
 339                                 `network` = '%s' WHERE `id` = %d
 340                         ",
 341                                 intval($new_relation),
 342                                 dbesc(datetime_convert()),
 343                                 dbesc(datetime_convert()),
 344                                 intval($duplex),
 345                                 intval($hidden),
 346                                 dbesc(NETWORK_DFRN),
 347                                 intval($contact_id)
 348                         );
 349                 }
 350                 else {
 351
 352                         // $network !== NETWORK_DFRN
 353
 354                         $network = (($contact['network']) ? $contact['network'] : NETWORK_OSTATUS);
 355                         $notify = (($contact['notify']) ? $contact['notify'] : '');
 356                         $poll   = (($contact['poll']) ? $contact['poll'] : '');
 357
 358                         if((! $contact['notify']) || (! $contact['poll'])) {
 359                                 $arr = lrdd($contact['url']);
 360                                 if(count($arr)) {
 361                                         foreach($arr as $link) {
 362                                                 if($link['@attributes']['rel'] === 'salmon')
 363                                                         $notify = $link['@attributes']['href'];
 364                                                 if($link['@attributes']['rel'] === NAMESPACE_FEED)
 365                                                         $poll = $link['@attributes']['href'];
 366                                         }
 367                                 }
 368                         }
 369
 370                         $new_relation = $contact['rel'];
 371                         $writable = $contact['writable'];
 372
 373                         if($network === NETWORK_DIASPORA) {
 374                                 if($duplex)
 375                                         $new_relation = CONTACT_IS_FRIEND;
 376                                 else
 377                                         $new_relation = CONTACT_IS_FOLLOWER;
 378
 379                                 if($new_relation != CONTACT_IS_FOLLOWER)
 380                                         $writable = 1;
 381                         }
 382
 383                         $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 384                                 intval($intro_id),
 385                                 intval($uid)
 386                         );
 387
 388
 389                         $r = q("UPDATE `contact` SET `name-date` = '%s',
 390                                 `uri-date` = '%s',
 391                                 `notify` = '%s',
 392                                 `poll` = '%s',
 393                                 `blocked` = 0,
 394                                 `pending` = 0,
 395                                 `network` = '%s',
 396                                 `writable` = %d,
 397                                 `hidden` = %d,
 398                                 `rel` = %d
 399                                 WHERE `id` = %d
 400                         ",
 401                                 dbesc(datetime_convert()),
 402                                 dbesc(datetime_convert()),
 403                                 dbesc($notify),
 404                                 dbesc($poll),
 405                                 dbesc($network),
 406                                 intval($writable),
 407                                 intval($hidden),
 408                                 intval($new_relation),
 409                                 intval($contact_id)
 410                         );
 411                 }
 412
 413                 if($r === false)
 414                                 notice( t('Unable to set contact photo.') . EOL);
 415
 416                 // reload contact info
 417
 418                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 419                         intval($contact_id)
 420                 );
 421                 if(count($r))
 422                         $contact = $r[0];
 423                 else
 424                         $contact = null;
 425
 426
 427                 if((isset($new_relation) && $new_relation == CONTACT_IS_FRIEND)) {
 428
 429                         if(($contact) && ($contact['network'] === NETWORK_DIASPORA)) {
 430                                 require_once('include/diaspora.php');
 431                                 $ret = diaspora::send_share($user[0],$r[0]);
 432                                 logger('share returns: ' . $ret);
 433                         }
 434
 435                         // Send a new friend post if we are allowed to...
 436
 437                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 438                                 intval($uid)
 439                         );
 440
 441                         if((count($r)) && ($r[0]['hide-friends'] == 0) && ($activity) && (! $hidden)) {
 442
 443                                 require_once('include/items.php');
 444
 445                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 446                                         intval($uid)
 447                                 );
 448
 449                                 if(count($self)) {
 450
 451                                         $arr = array();
 452                                         $arr['guid'] = get_guid(32);
 453                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $uid);
 454                                         $arr['uid'] = $uid;
 455                                         $arr['contact-id'] = $self[0]['id'];
 456                                         $arr['wall'] = 1;
 457                                         $arr['type'] = 'wall';
 458                                         $arr['gravity'] = 0;
 459                                         $arr['origin'] = 1;
 460                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 461                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 462                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 463
 464                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 465                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 466
 467                                         $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
 468                                         $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
 469
 470                                         $arr['verb'] = ACTIVITY_FRIEND;
 471                                         $arr['object-type'] = ACTIVITY_OBJ_PERSON;
 472                                         $arr['body'] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$BPhoto;
 473
 474                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
 475                                                 . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
 476                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
 477                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
 478                                         $arr['object'] .= '</link></object>' . "\n";
 479
 480                                         $arr['last-child'] = 1;
 481
 482                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 483                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 484                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 485                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 486
 487                                         $i = item_store($arr);
 488                                         if($i)
 489                                         proc_run('php',"include/notifier.php","activity","$i");
 490                                 }
 491                         }
 492                 }
 493
 494                 $def_gid = get_default_group($uid, $contact["network"]);
 495                 if($contact && intval($def_gid))
 496                         group_add_member($uid, '', $contact['id'], $def_gid);
 497
 498                 // Let's send our user to the contact editor in case they want to
 499                 // do anything special with this new friend.
 500
 501                 if($handsfree === null)
 502                         goaway($a->get_baseurl() . '/contacts/' . intval($contact_id));
 503                 else
 504                         return;
 505                 //NOTREACHED
 506         }
 507
 508         /**
 509          *
 510          *
 511          * End of Scenario 1. [Local confirmation of remote friend request].
 512          *
 513          * Begin Scenario 2. This is the remote response to the above scenario.
 514          * This will take place on the site that originally initiated the friend request.
 515          * In the section above where the confirming party makes a POST and
 516          * retrieves xml status information, they are communicating with the following code.
 517          *
 518          */
 519
 520         if(x($_POST,'source_url')) {
 521
 522                 // We are processing an external confirmation to an introduction created by our user.
 523
 524                 $public_key = ((x($_POST,'public_key'))   ? $_POST['public_key']           : '');
 525                 $dfrn_id    = ((x($_POST,'dfrn_id'))      ? hex2bin($_POST['dfrn_id'])     : '');
 526                 $source_url = ((x($_POST,'source_url'))   ? hex2bin($_POST['source_url'])  : '');
 527                 $aes_key    = ((x($_POST,'aes_key'))      ? $_POST['aes_key']              : '');
 528                 $duplex     = ((x($_POST,'duplex'))       ? intval($_POST['duplex'])       : 0 );
 529                 $page       = ((x($_POST,'page'))         ? intval($_POST['page'])         : 0 );
 530                 $version_id = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
 531
 532                 $forum = (($page == 1) ? 1 : 0);
 533                 $prv   = (($page == 2) ? 1 : 0);
 534
 535                 logger('dfrn_confirm: requestee contacted: ' . $node);
 536
 537                 logger('dfrn_confirm: request: POST=' . print_r($_POST,true), LOGGER_DATA);
 538
 539                 // If $aes_key is set, both of these items require unpacking from the hex transport encoding.
 540
 541                 if(x($aes_key)) {
 542                         $aes_key = hex2bin($aes_key);
 543                         $public_key = hex2bin($public_key);
 544                 }
 545
 546                 // Find our user's account
 547
 548                 $r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
 549                         dbesc($node));
 550
 551                 if(! count($r)) {
 552                         $message = sprintf(t('No user record found for \'%s\' '), $node);
 553                         xml_status(3,$message); // failure
 554                         // NOTREACHED
 555                 }
 556
 557                 $my_prvkey = $r[0]['prvkey'];
 558                 $local_uid = $r[0]['uid'];
 559
 560
 561                 if(! strstr($my_prvkey,'PRIVATE KEY')) {
 562                         $message = t('Our site encryption key is apparently messed up.');
 563                         xml_status(3,$message);
 564                 }
 565
 566                 // verify everything
 567
 568                 $decrypted_source_url = "";
 569                 openssl_private_decrypt($source_url,$decrypted_source_url,$my_prvkey);
 570
 571
 572                 if(! strlen($decrypted_source_url)) {
 573                         $message = t('Empty site URL was provided or URL could not be decrypted by us.');
 574                         xml_status(3,$message);
 575                         // NOTREACHED
 576                 }
 577
 578                 $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 579                         dbesc($decrypted_source_url),
 580                         intval($local_uid)
 581                 );
 582                 if(! count($ret)) {
 583                         if(strstr($decrypted_source_url,'http:'))
 584                                 $newurl = str_replace('http:','https:',$decrypted_source_url);
 585                         else
 586                                 $newurl = str_replace('https:','http:',$decrypted_source_url);
 587
 588                         $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 589                                 dbesc($newurl),
 590                                 intval($local_uid)
 591                         );
 592                         if(! count($ret)) {
 593                                 // this is either a bogus confirmation (?) or we deleted the original introduction.
 594                                 $message = t('Contact record was not found for you on our site.');
 595                                 xml_status(3,$message);
 596                                 return; // NOTREACHED
 597                         }
 598                 }
 599
 600                 $relation = $ret[0]['rel'];
 601
 602                 // Decrypt all this stuff we just received
 603
 604                 $foreign_pubkey = $ret[0]['site-pubkey'];
 605                 $dfrn_record    = $ret[0]['id'];
 606
 607                 if(! $foreign_pubkey) {
 608                         $message = sprintf( t('Site public key not available in contact record for URL %s.'), $newurl);
 609                         xml_status(3,$message);
 610                 }
 611
 612                 $decrypted_dfrn_id = "";
 613                 openssl_public_decrypt($dfrn_id,$decrypted_dfrn_id,$foreign_pubkey);
 614
 615                 if(strlen($aes_key)) {
 616                         $decrypted_aes_key = "";
 617                         openssl_private_decrypt($aes_key,$decrypted_aes_key,$my_prvkey);
 618                         $dfrn_pubkey = openssl_decrypt($public_key,'AES-256-CBC',$decrypted_aes_key);
 619                 }
 620                 else {
 621                         $dfrn_pubkey = $public_key;
 622                 }
 623
 624                 $r = q("SELECT * FROM `contact` WHERE `dfrn-id` = '%s' LIMIT 1",
 625                         dbesc($decrypted_dfrn_id)
 626                 );
 627                 if(count($r)) {
 628                         $message = t('The ID provided by your system is a duplicate on our system. It should work if you try again.');
 629                         xml_status(1,$message); // Birthday paradox - duplicate dfrn-id
 630                         // NOTREACHED
 631                 }
 632
 633                 $r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d",
 634                         dbesc($decrypted_dfrn_id),
 635                         dbesc($dfrn_pubkey),
 636                         intval($dfrn_record)
 637                 );
 638                 if(! count($r)) {
 639                         $message = t('Unable to set your contact credentials on our system.');
 640                         xml_status(3,$message);
 641                 }
 642
 643                 // It's possible that the other person also requested friendship.
 644                 // If it is a duplex relationship, ditch the issued-id if one exists.
 645
 646                 if($duplex) {
 647                         $r = q("UPDATE `contact` SET `issued-id` = '' WHERE `id` = %d",
 648                                 intval($dfrn_record)
 649                         );
 650                 }
 651
 652                 // We're good but now we have to scrape the profile photo and send notifications.
 653
 654
 655
 656                 $r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
 657                         intval($dfrn_record));
 658
 659                 if(count($r))
 660                         $photo = $r[0]['photo'];
 661                 else
 662                         $photo = $a->get_baseurl() . '/images/person-175.jpg';
 663
 664                 require_once("include/Photo.php");
 665
 666                 update_contact_avatar($photo,$local_uid,$dfrn_record);
 667
 668                 logger('dfrn_confirm: request - photos imported');
 669
 670                 $new_relation = CONTACT_IS_SHARING;
 671                 if(($relation == CONTACT_IS_FOLLOWER) || ($duplex))
 672                         $new_relation = CONTACT_IS_FRIEND;
 673
 674                 if(($relation == CONTACT_IS_FOLLOWER) && ($duplex))
 675                         $duplex = 0;
 676
 677                 $r = q("UPDATE `contact` SET
 678                         `rel` = %d,
 679                         `name-date` = '%s',
 680                         `uri-date` = '%s',
 681                         `blocked` = 0,
 682                         `pending` = 0,
 683                         `duplex` = %d,
 684                         `forum` = %d,
 685                         `prv` = %d,
 686                         `network` = '%s' WHERE `id` = %d
 687                 ",
 688                         intval($new_relation),
 689                         dbesc(datetime_convert()),
 690                         dbesc(datetime_convert()),
 691                         intval($duplex),
 692                         intval($forum),
 693                         intval($prv),
 694                         dbesc(NETWORK_DFRN),
 695                         intval($dfrn_record)
 696                 );
 697                 if($r === false) {    // indicates schema is messed up or total db failure
 698                         $message = t('Unable to update your contact profile details on our system');
 699                         xml_status(3,$message);
 700                 }
 701
 702                 // Otherwise everything seems to have worked and we are almost done. Yay!
 703                 // Send an email notification
 704
 705                 logger('dfrn_confirm: request: info updated');
 706
 707                 $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 708                         WHERE `contact`.`id` = %d LIMIT 1",
 709                         intval($dfrn_record)
 710                 );
 711
 712                 if(count($r))
 713                         $combined = $r[0];
 714
 715                 if((count($r)) && ($r[0]['notify-flags'] & NOTIFY_CONFIRM)) {
 716                         $mutual = ($new_relation == CONTACT_IS_FRIEND);
 717                         notification(array(
 718                                 'type'         => NOTIFY_CONFIRM,
 719                                 'notify_flags' => $r[0]['notify-flags'],
 720                                 'language'     => $r[0]['language'],
 721                                 'to_name'      => $r[0]['username'],
 722                                 'to_email'     => $r[0]['email'],
 723                                 'uid'          => $r[0]['uid'],
 724                                 'link'             => $a->get_baseurl() . '/contacts/' . $dfrn_record,
 725                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 726                                 'source_link'  => $r[0]['url'],
 727                                 'source_photo' => $r[0]['photo'],
 728                                 'verb'         => ($mutual?ACTIVITY_FRIEND:ACTIVITY_FOLLOW),
 729                                 'otype'        => 'intro'
 730                         ));
 731                 }
 732
 733                 // Send a new friend post if we are allowed to...
 734
 735                 if($page && intval(get_pconfig($local_uid,'system','post_joingroup'))) {
 736                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 737                                 intval($local_uid)
 738                         );
 739
 740                         if((count($r)) && ($r[0]['hide-friends'] == 0)) {
 741
 742                                 require_once('include/items.php');
 743
 744                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 745                                         intval($local_uid)
 746                                 );
 747
 748                                 if(count($self)) {
 749
 750                                         $arr = array();
 751                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $local_uid);
 752                                         $arr['uid'] = $local_uid;
 753                                         $arr['contact-id'] = $self[0]['id'];
 754                                         $arr['wall'] = 1;
 755                                         $arr['type'] = 'wall';
 756                                         $arr['gravity'] = 0;
 757                                         $arr['origin'] = 1;
 758                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 759                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 760                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 761
 762                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 763                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 764
 765                                         $B = '[url=' . $combined['url'] . ']' . $combined['name'] . '[/url]';
 766                                         $BPhoto = '[url=' . $combined['url'] . ']' . '[img]' . $combined['thumb'] . '[/img][/url]';
 767
 768                                         $arr['verb'] = ACTIVITY_JOIN;
 769                                         $arr['object-type'] = ACTIVITY_OBJ_GROUP;
 770                                         $arr['body'] =  sprintf( t('%1$s has joined %2$s'), $A, $B)."\n\n\n" .$BPhoto;
 771                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_GROUP . '</type><title>' . $combined['name'] . '</title>'
 772                                                 . '<id>' . $combined['url'] . '/' . $combined['name'] . '</id>';
 773                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $combined['url'] . '" />' . "\n");
 774                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $combined['thumb'] . '" />' . "\n");
 775                                         $arr['object'] .= '</link></object>' . "\n";
 776
 777                                         $arr['last-child'] = 1;
 778
 779                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 780                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 781                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 782                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 783
 784                                         $i = item_store($arr);
 785                                         if($i)
 786                                         proc_run('php',"include/notifier.php","activity","$i");
 787
 788                                 }
 789                         }
 790                 }
 791                 xml_status(0); // Success
 792                 return; // NOTREACHED
 793
 794                         ////////////////////// End of this scenario ///////////////////////////////////////////////
 795         }
 796
 797         // somebody arrived here by mistake or they are fishing. Send them to the homepage.
 798
 799         goaway(z_root());
 800         // NOTREACHED
 801
 802 }