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 require_once('include/Probe.php');
  20
  21 function dfrn_confirm_post(&$a,$handsfree = null) {
  22
  23         if(is_array($handsfree)) {
  24
  25                 /**
  26                  * We were called directly from dfrn_request due to automatic friend acceptance.
  27                  * Any $_POST parameters we may require are supplied in the $handsfree array.
  28                  *
  29                  */
  30
  31                 $node = $handsfree['node'];
  32                 $a->interactive = false; // notice() becomes a no-op since nobody is there to see it
  33
  34         }
  35         else {
  36                 if($a->argc > 1)
  37                         $node = $a->argv[1];
  38         }
  39
  40                 /**
  41                  *
  42                  * Main entry point. Scenario 1. Our user received a friend request notification (perhaps
  43                  * from another site) and clicked 'Approve'.
  44                  * $POST['source_url'] is not set. If it is, it indicates Scenario 2.
  45                  *
  46                  * We may also have been called directly from dfrn_request ($handsfree != null) due to
  47                  * this being a page type which supports automatic friend acceptance. That is also Scenario 1
  48                  * since we are operating on behalf of our registered user to approve a friendship.
  49                  *
  50                  */
  51
  52         if(! x($_POST,'source_url')) {
  53
  54                 $uid = ((is_array($handsfree)) ? $handsfree['uid'] : local_user());
  55
  56                 if(! $uid) {
  57                         notice( t('Permission denied.') . EOL );
  58                         return;
  59                 }
  60
  61                 $user = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
  62                         intval($uid)
  63                 );
  64
  65                 if(! $user) {
  66                         notice( t('Profile not found.') . EOL );
  67                         return;
  68                 }
  69
  70
  71                 // These data elements may come from either the friend request notification form or $handsfree array.
  72
  73                 if(is_array($handsfree)) {
  74                         logger('Confirm in handsfree mode');
  75                         $dfrn_id   = $handsfree['dfrn_id'];
  76                         $intro_id  = $handsfree['intro_id'];
  77                         $duplex    = $handsfree['duplex'];
  78                         $hidden    = ((array_key_exists('hidden',$handsfree)) ? intval($handsfree['hidden']) : 0 );
  79                         $activity  = ((array_key_exists('activity',$handsfree)) ? intval($handsfree['activity']) : 0 );
  80                 }
  81                 else {
  82                         $dfrn_id  = ((x($_POST,'dfrn_id'))    ? notags(trim($_POST['dfrn_id'])) : "");
  83                         $intro_id = ((x($_POST,'intro_id'))   ? intval($_POST['intro_id'])      : 0 );
  84                         $duplex   = ((x($_POST,'duplex'))     ? intval($_POST['duplex'])        : 0 );
  85                         $cid      = ((x($_POST,'contact_id')) ? intval($_POST['contact_id'])    : 0 );
  86                         $hidden   = ((x($_POST,'hidden'))     ? intval($_POST['hidden'])        : 0 );
  87                         $activity = ((x($_POST,'activity'))   ? intval($_POST['activity'])      : 0 );
  88                 }
  89
  90                 /**
  91                  *
  92                  * Ensure that dfrn_id has precedence when we go to find the contact record.
  93                  * We only want to search based on contact id if there is no dfrn_id,
  94                  * e.g. for OStatus network followers.
  95                  *
  96                  */
  97
  98                 if(strlen($dfrn_id))
  99                         $cid = 0;
 100
 101                 logger('Confirming request for dfrn_id (issued) ' . $dfrn_id);
 102                 if($cid)
 103                         logger('Confirming follower with contact_id: ' . $cid);
 104
 105
 106                 /**
 107                  *
 108                  * The other person will have been issued an ID when they first requested friendship.
 109                  * Locate their record. At this time, their record will have both pending and blocked set to 1.
 110                  * There won't be any dfrn_id if this is a network follower, so use the contact_id instead.
 111                  *
 112                  */
 113
 114                 $r = q("SELECT * FROM `contact` WHERE ( ( `issued-id` != '' AND `issued-id` = '%s' ) OR ( `id` = %d AND `id` != 0 ) ) AND `uid` = %d AND `duplex` = 0 LIMIT 1",
 115                         dbesc($dfrn_id),
 116                         intval($cid),
 117                         intval($uid)
 118                 );
 119
 120                 if(! count($r)) {
 121                         logger('Contact not found in DB.');
 122                         notice( t('Contact not found.') . EOL );
 123                         notice( t('This may occasionally happen if contact was requested by both persons and it has already been approved.') . EOL );
 124                         return;
 125                 }
 126
 127                 $contact = $r[0];
 128
 129                 $contact_id   = $contact['id'];
 130                 $relation     = $contact['rel'];
 131                 $site_pubkey  = $contact['site-pubkey'];
 132                 $dfrn_confirm = $contact['confirm'];
 133                 $aes_allow    = $contact['aes_allow'];
 134
 135                 $network = ((strlen($contact['issued-id'])) ? NETWORK_DFRN : NETWORK_OSTATUS);
 136
 137                 if($contact['network'])
 138                         $network = $contact['network'];
 139
 140                 if($network === NETWORK_DFRN) {
 141
 142                         /**
 143                          *
 144                          * Generate a key pair for all further communications with this person.
 145                          * We have a keypair for every contact, and a site key for unknown people.
 146                          * This provides a means to carry on relationships with other people if
 147                          * any single key is compromised. It is a robust key. We're much more
 148                          * worried about key leakage than anybody cracking it.
 149                          *
 150                          */
 151                         require_once('include/crypto.php');
 152
 153                         $res = new_keypair(4096);
 154
 155
 156                         $private_key = $res['prvkey'];
 157                         $public_key  = $res['pubkey'];
 158
 159                         // Save the private key. Send them the public key.
 160
 161                         $r = q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d",
 162                                 dbesc($private_key),
 163                                 intval($contact_id),
 164                                 intval($uid)
 165                         );
 166
 167                         $params = array();
 168
 169                         /**
 170                          *
 171                          * Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our
 172                          * site private key (person on the other end can decrypt it with our site public key).
 173                          * Then encrypt our profile URL with the other person's site public key. They can decrypt
 174                          * it with their site private key. If the decryption on the other end fails for either
 175                          * item, it indicates tampering or key failure on at least one site and we will not be
 176                          * able to provide a secure communication pathway.
 177                          *
 178                          * If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3
 179                          * or later) then we encrypt the personal public key we send them using AES-256-CBC and a
 180                          * random key which is encrypted with their site public key.
 181                          *
 182                          */
 183
 184                         $src_aes_key = random_string();
 185
 186                         $result = '';
 187                         openssl_private_encrypt($dfrn_id,$result,$user[0]['prvkey']);
 188
 189                         $params['dfrn_id'] = bin2hex($result);
 190                         $params['public_key'] = $public_key;
 191
 192
 193                         $my_url = $a->get_baseurl() . '/profile/' . $user[0]['nickname'];
 194
 195                         openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
 196                         $params['source_url'] = bin2hex($params['source_url']);
 197
 198                         if($aes_allow && function_exists('openssl_encrypt')) {
 199                                 openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
 200                                 $params['aes_key'] = bin2hex($params['aes_key']);
 201                                 $params['public_key'] = bin2hex(openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key));
 202                         }
 203
 204                         $params['dfrn_version'] = DFRN_PROTOCOL_VERSION ;
 205                         if($duplex == 1)
 206                                 $params['duplex'] = 1;
 207
 208                         if($user[0]['page-flags'] == PAGE_COMMUNITY)
 209                                 $params['page'] = 1;
 210                         if($user[0]['page-flags'] == PAGE_PRVGROUP)
 211                                 $params['page'] = 2;
 212
 213                         logger('Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA);
 214
 215                         /**
 216                          *
 217                          * POST all this stuff to the other site.
 218                          * Temporarily raise the network timeout to 120 seconds because the default 60
 219                          * doesn't always give the other side quite enough time to decrypt everything.
 220                          *
 221                          */
 222
 223                         $a->config['system']['curl_timeout'] = 120;
 224
 225                         $res = post_url($dfrn_confirm,$params);
 226
 227                         logger(' Confirm: received data: ' . $res, LOGGER_DATA);
 228
 229                         // Now figure out what they responded. Try to be robust if the remote site is
 230                         // having difficulty and throwing up errors of some kind.
 231
 232                         $leading_junk = substr($res,0,strpos($res,'<?xml'));
 233
 234                         $res = substr($res,strpos($res,'<?xml'));
 235                         if(! strlen($res)) {
 236
 237                                         // No XML at all, this exchange is messed up really bad.
 238                                         // We shouldn't proceed, because the xml parser might choke,
 239                                         // and $status is going to be zero, which indicates success.
 240                                         // We can hardly call this a success.
 241
 242                                 notice( t('Response from remote site was not understood.') . EOL);
 243                                 return;
 244                         }
 245
 246                         if(strlen($leading_junk) && get_config('system','debugging')) {
 247
 248                                         // This might be more common. Mixed error text and some XML.
 249                                         // If we're configured for debugging, show the text. Proceed in either case.
 250
 251                                 notice( t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL );
 252                         }
 253
 254                         if(stristr($res, "<status")===false) {
 255                                 // wrong xml! stop here!
 256                                 notice( t('Unexpected response from remote site: ') . EOL . htmlspecialchars($res) . EOL );
 257                                 return;
 258                         }
 259
 260                         $xml = parse_xml_string($res);
 261                         $status = (int) $xml->status;
 262                         $message = unxmlify($xml->message);   // human readable text of what may have gone wrong.
 263                         switch($status) {
 264                                 case 0:
 265                                         info( t("Confirmation completed successfully.") . EOL);
 266                                         if(strlen($message))
 267                                                 notice( t('Remote site reported: ') . $message . EOL);
 268                                         break;
 269                                 case 1:
 270                                         // birthday paradox - generate new dfrn-id and fall through.
 271                                         $new_dfrn_id = random_string();
 272                                         $r = q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d",
 273                                                 dbesc($new_dfrn_id),
 274                                                 intval($contact_id),
 275                                                 intval($uid)
 276                                         );
 277
 278                                 case 2:
 279                                         notice( t("Temporary failure. Please wait and try again.") . EOL);
 280                                         if(strlen($message))
 281                                                 notice( t('Remote site reported: ') . $message . EOL);
 282                                         break;
 283
 284
 285                                 case 3:
 286                                         notice( t("Introduction failed or was revoked.") . EOL);
 287                                         if(strlen($message))
 288                                                 notice( t('Remote site reported: ') . $message . EOL);
 289                                         break;
 290                                 }
 291
 292                         if(($status == 0) && ($intro_id)) {
 293
 294                                 // Success. Delete the notification.
 295
 296                                 $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 297                                         intval($intro_id),
 298                                         intval($uid)
 299                                 );
 300
 301                         }
 302
 303                         if($status != 0)
 304                                 return;
 305                 }
 306
 307
 308                 /*
 309                  *
 310                  * We have now established a relationship with the other site.
 311                  * Let's make our own personal copy of their profile photo so we don't have
 312                  * to always load it from their site.
 313                  *
 314                  * We will also update the contact record with the nature and scope of the relationship.
 315                  *
 316                  */
 317
 318                 require_once('include/Photo.php');
 319
 320                 update_contact_avatar($contact['photo'],$uid,$contact_id);
 321
 322                 logger('dfrn_confirm: confirm - imported photos');
 323
 324                 if($network === NETWORK_DFRN) {
 325
 326                         $new_relation = CONTACT_IS_FOLLOWER;
 327                         if(($relation == CONTACT_IS_SHARING) || ($duplex))
 328                                 $new_relation = CONTACT_IS_FRIEND;
 329
 330                         if(($relation == CONTACT_IS_SHARING) && ($duplex))
 331                                 $duplex = 0;
 332
 333                         $r = q("UPDATE `contact` SET `rel` = %d,
 334                                 `name-date` = '%s',
 335                                 `uri-date` = '%s',
 336                                 `blocked` = 0,
 337                                 `pending` = 0,
 338                                 `duplex` = %d,
 339                                 `hidden` = %d,
 340                                 `network` = '%s' WHERE `id` = %d
 341                         ",
 342                                 intval($new_relation),
 343                                 dbesc(datetime_convert()),
 344                                 dbesc(datetime_convert()),
 345                                 intval($duplex),
 346                                 intval($hidden),
 347                                 dbesc(NETWORK_DFRN),
 348                                 intval($contact_id)
 349                         );
 350                 }
 351                 else {
 352
 353                         // $network !== NETWORK_DFRN
 354
 355                         $network = (($contact['network']) ? $contact['network'] : NETWORK_OSTATUS);
 356                         $notify = (($contact['notify']) ? $contact['notify'] : '');
 357                         $poll   = (($contact['poll']) ? $contact['poll'] : '');
 358
 359                         if((! $contact['notify']) || (! $contact['poll'])) {
 360                                 $arr = Probe::lrdd($contact['url']);
 361                                 if(count($arr)) {
 362                                         foreach($arr as $link) {
 363                                                 if($link['@attributes']['rel'] === 'salmon')
 364                                                         $notify = $link['@attributes']['href'];
 365                                                 if($link['@attributes']['rel'] === NAMESPACE_FEED)
 366                                                         $poll = $link['@attributes']['href'];
 367                                         }
 368                                 }
 369                         }
 370
 371                         $new_relation = $contact['rel'];
 372                         $writable = $contact['writable'];
 373
 374                         if($network === NETWORK_DIASPORA) {
 375                                 if($duplex)
 376                                         $new_relation = CONTACT_IS_FRIEND;
 377                                 else
 378                                         $new_relation = CONTACT_IS_FOLLOWER;
 379
 380                                 if($new_relation != CONTACT_IS_FOLLOWER)
 381                                         $writable = 1;
 382                         }
 383
 384                         $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d",
 385                                 intval($intro_id),
 386                                 intval($uid)
 387                         );
 388
 389
 390                         $r = q("UPDATE `contact` SET `name-date` = '%s',
 391                                 `uri-date` = '%s',
 392                                 `notify` = '%s',
 393                                 `poll` = '%s',
 394                                 `blocked` = 0,
 395                                 `pending` = 0,
 396                                 `network` = '%s',
 397                                 `writable` = %d,
 398                                 `hidden` = %d,
 399                                 `rel` = %d
 400                                 WHERE `id` = %d
 401                         ",
 402                                 dbesc(datetime_convert()),
 403                                 dbesc(datetime_convert()),
 404                                 dbesc($notify),
 405                                 dbesc($poll),
 406                                 dbesc($network),
 407                                 intval($writable),
 408                                 intval($hidden),
 409                                 intval($new_relation),
 410                                 intval($contact_id)
 411                         );
 412                 }
 413
 414                 if($r === false)
 415                                 notice( t('Unable to set contact photo.') . EOL);
 416
 417                 // reload contact info
 418
 419                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 420                         intval($contact_id)
 421                 );
 422                 if(count($r))
 423                         $contact = $r[0];
 424                 else
 425                         $contact = null;
 426
 427
 428                 if((isset($new_relation) && $new_relation == CONTACT_IS_FRIEND)) {
 429
 430                         if(($contact) && ($contact['network'] === NETWORK_DIASPORA)) {
 431                                 require_once('include/diaspora.php');
 432                                 $ret = diaspora::send_share($user[0],$r[0]);
 433                                 logger('share returns: ' . $ret);
 434                         }
 435
 436                         // Send a new friend post if we are allowed to...
 437
 438                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 439                                 intval($uid)
 440                         );
 441
 442                         if((count($r)) && ($r[0]['hide-friends'] == 0) && ($activity) && (! $hidden)) {
 443
 444                                 require_once('include/items.php');
 445
 446                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 447                                         intval($uid)
 448                                 );
 449
 450                                 if(count($self)) {
 451
 452                                         $arr = array();
 453                                         $arr['guid'] = get_guid(32);
 454                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $uid);
 455                                         $arr['uid'] = $uid;
 456                                         $arr['contact-id'] = $self[0]['id'];
 457                                         $arr['wall'] = 1;
 458                                         $arr['type'] = 'wall';
 459                                         $arr['gravity'] = 0;
 460                                         $arr['origin'] = 1;
 461                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 462                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 463                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 464
 465                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 466                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 467
 468                                         $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
 469                                         $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
 470
 471                                         $arr['verb'] = ACTIVITY_FRIEND;
 472                                         $arr['object-type'] = ACTIVITY_OBJ_PERSON;
 473                                         $arr['body'] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$BPhoto;
 474
 475                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
 476                                                 . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
 477                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
 478                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
 479                                         $arr['object'] .= '</link></object>' . "\n";
 480
 481                                         $arr['last-child'] = 1;
 482
 483                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 484                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 485                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 486                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 487
 488                                         $i = item_store($arr);
 489                                         if($i)
 490                                         proc_run('php',"include/notifier.php","activity","$i");
 491                                 }
 492                         }
 493                 }
 494
 495                 $def_gid = get_default_group($uid, $contact["network"]);
 496                 if($contact && intval($def_gid))
 497                         group_add_member($uid, '', $contact['id'], $def_gid);
 498
 499                 // Let's send our user to the contact editor in case they want to
 500                 // do anything special with this new friend.
 501
 502                 if($handsfree === null)
 503                         goaway($a->get_baseurl() . '/contacts/' . intval($contact_id));
 504                 else
 505                         return;
 506                 //NOTREACHED
 507         }
 508
 509         /**
 510          *
 511          *
 512          * End of Scenario 1. [Local confirmation of remote friend request].
 513          *
 514          * Begin Scenario 2. This is the remote response to the above scenario.
 515          * This will take place on the site that originally initiated the friend request.
 516          * In the section above where the confirming party makes a POST and
 517          * retrieves xml status information, they are communicating with the following code.
 518          *
 519          */
 520
 521         if(x($_POST,'source_url')) {
 522
 523                 // We are processing an external confirmation to an introduction created by our user.
 524
 525                 $public_key = ((x($_POST,'public_key'))   ? $_POST['public_key']           : '');
 526                 $dfrn_id    = ((x($_POST,'dfrn_id'))      ? hex2bin($_POST['dfrn_id'])     : '');
 527                 $source_url = ((x($_POST,'source_url'))   ? hex2bin($_POST['source_url'])  : '');
 528                 $aes_key    = ((x($_POST,'aes_key'))      ? $_POST['aes_key']              : '');
 529                 $duplex     = ((x($_POST,'duplex'))       ? intval($_POST['duplex'])       : 0 );
 530                 $page       = ((x($_POST,'page'))         ? intval($_POST['page'])         : 0 );
 531                 $version_id = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
 532
 533                 $forum = (($page == 1) ? 1 : 0);
 534                 $prv   = (($page == 2) ? 1 : 0);
 535
 536                 logger('dfrn_confirm: requestee contacted: ' . $node);
 537
 538                 logger('dfrn_confirm: request: POST=' . print_r($_POST,true), LOGGER_DATA);
 539
 540                 // If $aes_key is set, both of these items require unpacking from the hex transport encoding.
 541
 542                 if(x($aes_key)) {
 543                         $aes_key = hex2bin($aes_key);
 544                         $public_key = hex2bin($public_key);
 545                 }
 546
 547                 // Find our user's account
 548
 549                 $r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
 550                         dbesc($node));
 551
 552                 if(! count($r)) {
 553                         $message = sprintf(t('No user record found for \'%s\' '), $node);
 554                         xml_status(3,$message); // failure
 555                         // NOTREACHED
 556                 }
 557
 558                 $my_prvkey = $r[0]['prvkey'];
 559                 $local_uid = $r[0]['uid'];
 560
 561
 562                 if(! strstr($my_prvkey,'PRIVATE KEY')) {
 563                         $message = t('Our site encryption key is apparently messed up.');
 564                         xml_status(3,$message);
 565                 }
 566
 567                 // verify everything
 568
 569                 $decrypted_source_url = "";
 570                 openssl_private_decrypt($source_url,$decrypted_source_url,$my_prvkey);
 571
 572
 573                 if(! strlen($decrypted_source_url)) {
 574                         $message = t('Empty site URL was provided or URL could not be decrypted by us.');
 575                         xml_status(3,$message);
 576                         // NOTREACHED
 577                 }
 578
 579                 $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 580                         dbesc($decrypted_source_url),
 581                         intval($local_uid)
 582                 );
 583                 if(! count($ret)) {
 584                         if(strstr($decrypted_source_url,'http:'))
 585                                 $newurl = str_replace('http:','https:',$decrypted_source_url);
 586                         else
 587                                 $newurl = str_replace('https:','http:',$decrypted_source_url);
 588
 589                         $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 590                                 dbesc($newurl),
 591                                 intval($local_uid)
 592                         );
 593                         if(! count($ret)) {
 594                                 // this is either a bogus confirmation (?) or we deleted the original introduction.
 595                                 $message = t('Contact record was not found for you on our site.');
 596                                 xml_status(3,$message);
 597                                 return; // NOTREACHED
 598                         }
 599                 }
 600
 601                 $relation = $ret[0]['rel'];
 602
 603                 // Decrypt all this stuff we just received
 604
 605                 $foreign_pubkey = $ret[0]['site-pubkey'];
 606                 $dfrn_record    = $ret[0]['id'];
 607
 608                 if(! $foreign_pubkey) {
 609                         $message = sprintf( t('Site public key not available in contact record for URL %s.'), $newurl);
 610                         xml_status(3,$message);
 611                 }
 612
 613                 $decrypted_dfrn_id = "";
 614                 openssl_public_decrypt($dfrn_id,$decrypted_dfrn_id,$foreign_pubkey);
 615
 616                 if(strlen($aes_key)) {
 617                         $decrypted_aes_key = "";
 618                         openssl_private_decrypt($aes_key,$decrypted_aes_key,$my_prvkey);
 619                         $dfrn_pubkey = openssl_decrypt($public_key,'AES-256-CBC',$decrypted_aes_key);
 620                 }
 621                 else {
 622                         $dfrn_pubkey = $public_key;
 623                 }
 624
 625                 $r = q("SELECT * FROM `contact` WHERE `dfrn-id` = '%s' LIMIT 1",
 626                         dbesc($decrypted_dfrn_id)
 627                 );
 628                 if(count($r)) {
 629                         $message = t('The ID provided by your system is a duplicate on our system. It should work if you try again.');
 630                         xml_status(1,$message); // Birthday paradox - duplicate dfrn-id
 631                         // NOTREACHED
 632                 }
 633
 634                 $r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d",
 635                         dbesc($decrypted_dfrn_id),
 636                         dbesc($dfrn_pubkey),
 637                         intval($dfrn_record)
 638                 );
 639                 if(! count($r)) {
 640                         $message = t('Unable to set your contact credentials on our system.');
 641                         xml_status(3,$message);
 642                 }
 643
 644                 // It's possible that the other person also requested friendship.
 645                 // If it is a duplex relationship, ditch the issued-id if one exists.
 646
 647                 if($duplex) {
 648                         $r = q("UPDATE `contact` SET `issued-id` = '' WHERE `id` = %d",
 649                                 intval($dfrn_record)
 650                         );
 651                 }
 652
 653                 // We're good but now we have to scrape the profile photo and send notifications.
 654
 655
 656
 657                 $r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
 658                         intval($dfrn_record));
 659
 660                 if(count($r))
 661                         $photo = $r[0]['photo'];
 662                 else
 663                         $photo = $a->get_baseurl() . '/images/person-175.jpg';
 664
 665                 require_once("include/Photo.php");
 666
 667                 update_contact_avatar($photo,$local_uid,$dfrn_record);
 668
 669                 logger('dfrn_confirm: request - photos imported');
 670
 671                 $new_relation = CONTACT_IS_SHARING;
 672                 if(($relation == CONTACT_IS_FOLLOWER) || ($duplex))
 673                         $new_relation = CONTACT_IS_FRIEND;
 674
 675                 if(($relation == CONTACT_IS_FOLLOWER) && ($duplex))
 676                         $duplex = 0;
 677
 678                 $r = q("UPDATE `contact` SET
 679                         `rel` = %d,
 680                         `name-date` = '%s',
 681                         `uri-date` = '%s',
 682                         `blocked` = 0,
 683                         `pending` = 0,
 684                         `duplex` = %d,
 685                         `forum` = %d,
 686                         `prv` = %d,
 687                         `network` = '%s' WHERE `id` = %d
 688                 ",
 689                         intval($new_relation),
 690                         dbesc(datetime_convert()),
 691                         dbesc(datetime_convert()),
 692                         intval($duplex),
 693                         intval($forum),
 694                         intval($prv),
 695                         dbesc(NETWORK_DFRN),
 696                         intval($dfrn_record)
 697                 );
 698                 if($r === false) {    // indicates schema is messed up or total db failure
 699                         $message = t('Unable to update your contact profile details on our system');
 700                         xml_status(3,$message);
 701                 }
 702
 703                 // Otherwise everything seems to have worked and we are almost done. Yay!
 704                 // Send an email notification
 705
 706                 logger('dfrn_confirm: request: info updated');
 707
 708                 $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 709                         WHERE `contact`.`id` = %d LIMIT 1",
 710                         intval($dfrn_record)
 711                 );
 712
 713                 if(count($r))
 714                         $combined = $r[0];
 715
 716                 if((count($r)) && ($r[0]['notify-flags'] & NOTIFY_CONFIRM)) {
 717                         $mutual = ($new_relation == CONTACT_IS_FRIEND);
 718                         notification(array(
 719                                 'type'         => NOTIFY_CONFIRM,
 720                                 'notify_flags' => $r[0]['notify-flags'],
 721                                 'language'     => $r[0]['language'],
 722                                 'to_name'      => $r[0]['username'],
 723                                 'to_email'     => $r[0]['email'],
 724                                 'uid'          => $r[0]['uid'],
 725                                 'link'             => $a->get_baseurl() . '/contacts/' . $dfrn_record,
 726                                 'source_name'  => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 727                                 'source_link'  => $r[0]['url'],
 728                                 'source_photo' => $r[0]['photo'],
 729                                 'verb'         => ($mutual?ACTIVITY_FRIEND:ACTIVITY_FOLLOW),
 730                                 'otype'        => 'intro'
 731                         ));
 732                 }
 733
 734                 // Send a new friend post if we are allowed to...
 735
 736                 if($page && intval(get_pconfig($local_uid,'system','post_joingroup'))) {
 737                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 738                                 intval($local_uid)
 739                         );
 740
 741                         if((count($r)) && ($r[0]['hide-friends'] == 0)) {
 742
 743                                 require_once('include/items.php');
 744
 745                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 746                                         intval($local_uid)
 747                                 );
 748
 749                                 if(count($self)) {
 750
 751                                         $arr = array();
 752                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $local_uid);
 753                                         $arr['uid'] = $local_uid;
 754                                         $arr['contact-id'] = $self[0]['id'];
 755                                         $arr['wall'] = 1;
 756                                         $arr['type'] = 'wall';
 757                                         $arr['gravity'] = 0;
 758                                         $arr['origin'] = 1;
 759                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 760                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 761                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 762
 763                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 764                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 765
 766                                         $B = '[url=' . $combined['url'] . ']' . $combined['name'] . '[/url]';
 767                                         $BPhoto = '[url=' . $combined['url'] . ']' . '[img]' . $combined['thumb'] . '[/img][/url]';
 768
 769                                         $arr['verb'] = ACTIVITY_JOIN;
 770                                         $arr['object-type'] = ACTIVITY_OBJ_GROUP;
 771                                         $arr['body'] =  sprintf( t('%1$s has joined %2$s'), $A, $B)."\n\n\n" .$BPhoto;
 772                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_GROUP . '</type><title>' . $combined['name'] . '</title>'
 773                                                 . '<id>' . $combined['url'] . '/' . $combined['name'] . '</id>';
 774                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $combined['url'] . '" />' . "\n");
 775                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $combined['thumb'] . '" />' . "\n");
 776                                         $arr['object'] .= '</link></object>' . "\n";
 777
 778                                         $arr['last-child'] = 1;
 779
 780                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 781                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 782                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 783                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 784
 785                                         $i = item_store($arr);
 786                                         if($i)
 787                                         proc_run('php',"include/notifier.php","activity","$i");
 788
 789                                 }
 790                         }
 791                 }
 792                 xml_status(0); // Success
 793                 return; // NOTREACHED
 794
 795                         ////////////////////// End of this scenario ///////////////////////////////////////////////
 796         }
 797
 798         // somebody arrived here by mistake or they are fishing. Send them to the homepage.
 799
 800         goaway(z_root());
 801         // NOTREACHED
 802
 803 }