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 function dfrn_confirm_post(&$a,$handsfree = null) {
  18
  19         if(is_array($handsfree)) {
  20
  21                 /**
  22                  * We were called directly from dfrn_request due to automatic friend acceptance.
  23                  * Any $_POST parameters we may require are supplied in the $handsfree array.
  24                  *
  25                  */
  26
  27                 $node = $handsfree['node'];
  28                 $a->interactive = false; // notice() becomes a no-op since nobody is there to see it
  29
  30         }
  31         else {
  32                 if($a->argc > 1)
  33                         $node = $a->argv[1];
  34         }
  35
  36                 /**
  37                  *
  38                  * Main entry point. Scenario 1. Our user received a friend request notification (perhaps
  39                  * from another site) and clicked 'Approve'.
  40                  * $POST['source_url'] is not set. If it is, it indicates Scenario 2.
  41                  *
  42                  * We may also have been called directly from dfrn_request ($handsfree != null) due to
  43                  * this being a page type which supports automatic friend acceptance. That is also Scenario 1
  44                  * since we are operating on behalf of our registered user to approve a friendship.
  45                  *
  46                  */
  47
  48         if(! x($_POST,'source_url')) {
  49
  50                 $uid = ((is_array($handsfree)) ? $handsfree['uid'] : local_user());
  51
  52                 if(! $uid) {
  53                         notice( t('Permission denied.') . EOL );
  54                         return;
  55                 }
  56
  57                 $user = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
  58                         intval($uid)
  59                 );
  60
  61                 if(! $user) {
  62                         notice( t('Profile not found.') . EOL );
  63                         return;
  64                 }
  65
  66
  67                 // These data elements may come from either the friend request notification form or $handsfree array.
  68
  69                 if(is_array($handsfree)) {
  70                         logger('dfrn_confirm: Confirm in handsfree mode');
  71                         $dfrn_id   = $handsfree['dfrn_id'];
  72                         $intro_id  = $handsfree['intro_id'];
  73                         $duplex    = $handsfree['duplex'];
  74                         $hidden    = ((array_key_exists('hidden',$handsfree)) ? intval($handsfree['hidden']) : 0 );
  75                         $activity  = ((array_key_exists('activity',$handsfree)) ? intval($handsfree['activity']) : 0 );
  76                 }
  77                 else {
  78                         $dfrn_id  = ((x($_POST,'dfrn_id'))    ? notags(trim($_POST['dfrn_id'])) : "");
  79                         $intro_id = ((x($_POST,'intro_id'))   ? intval($_POST['intro_id'])      : 0 );
  80                         $duplex   = ((x($_POST,'duplex'))     ? intval($_POST['duplex'])        : 0 );
  81                         $cid      = ((x($_POST,'contact_id')) ? intval($_POST['contact_id'])    : 0 );
  82                         $hidden   = ((x($_POST,'hidden'))     ? intval($_POST['hidden'])        : 0 );
  83                         $activity = ((x($_POST,'activity'))   ? intval($_POST['activity'])      : 0 );
  84                 }
  85
  86                 /**
  87                  *
  88                  * Ensure that dfrn_id has precedence when we go to find the contact record.
  89                  * We only want to search based on contact id if there is no dfrn_id,
  90                  * e.g. for OStatus network followers.
  91                  *
  92                  */
  93
  94                 if(strlen($dfrn_id))
  95                         $cid = 0;
  96
  97                 logger('dfrn_confirm: Confirming request for dfrn_id (issued) ' . $dfrn_id);
  98                 if($cid)
  99                         logger('dfrn_confirm: Confirming follower with contact_id: ' . $cid);
 100
 101
 102                 /**
 103                  *
 104                  * The other person will have been issued an ID when they first requested friendship.
 105                  * Locate their record. At this time, their record will have both pending and blocked set to 1.
 106                  * There won't be any dfrn_id if this is a network follower, so use the contact_id instead.
 107                  *
 108                  */
 109
 110                 $r = q("SELECT * FROM `contact` WHERE ( ( `issued-id` != '' AND `issued-id` = '%s' ) OR ( `id` = %d AND `id` != 0 ) ) AND `uid` = %d AND `duplex` = 0 LIMIT 1",
 111                         dbesc($dfrn_id),
 112                         intval($cid),
 113                         intval($uid)
 114                 );
 115
 116                 if(! count($r)) {
 117                         logger('dfrn_confirm: Contact not found in DB.');
 118                         notice( t('Contact not found.') . EOL );
 119                         notice( t('This may occasionally happen if contact was requested by both persons and it has already been approved.') . EOL );
 120                         return;
 121                 }
 122
 123                 $contact = $r[0];
 124
 125                 $contact_id   = $contact['id'];
 126                 $relation     = $contact['rel'];
 127                 $site_pubkey  = $contact['site-pubkey'];
 128                 $dfrn_confirm = $contact['confirm'];
 129                 $aes_allow    = $contact['aes_allow'];
 130
 131                 $network = ((strlen($contact['issued-id'])) ? NETWORK_DFRN : NETWORK_OSTATUS);
 132
 133                 if($contact['network'])
 134                         $network = $contact['network'];
 135
 136                 if($network === NETWORK_DFRN) {
 137
 138                         /**
 139                          *
 140                          * Generate a key pair for all further communications with this person.
 141                          * We have a keypair for every contact, and a site key for unknown people.
 142                          * This provides a means to carry on relationships with other people if
 143                          * any single key is compromised. It is a robust key. We're much more
 144                          * worried about key leakage than anybody cracking it.
 145                          *
 146                          */
 147                         require_once('include/crypto.php');
 148
 149                         $res = new_keypair(1024);
 150
 151                         $private_key = $res['prvkey'];
 152                         $public_key  = $res['pubkey'];
 153
 154                         // Save the private key. Send them the public key.
 155
 156                         $r = q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d LIMIT 1",
 157                                 dbesc($private_key),
 158                                 intval($contact_id),
 159                                 intval($uid)
 160                         );
 161
 162                         $params = array();
 163
 164                         /**
 165                          *
 166                          * Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our
 167                          * site private key (person on the other end can decrypt it with our site public key).
 168                          * Then encrypt our profile URL with the other person's site public key. They can decrypt
 169                          * it with their site private key. If the decryption on the other end fails for either
 170                          * item, it indicates tampering or key failure on at least one site and we will not be
 171                          * able to provide a secure communication pathway.
 172                          *
 173                          * If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3
 174                          * or later) then we encrypt the personal public key we send them using AES-256-CBC and a
 175                          * random key which is encrypted with their site public key.
 176                          *
 177                          */
 178
 179                         $src_aes_key = random_string();
 180
 181                         $result = '';
 182                         openssl_private_encrypt($dfrn_id,$result,$user[0]['prvkey']);
 183
 184                         $params['dfrn_id'] = bin2hex($result);
 185                         $params['public_key'] = $public_key;
 186
 187
 188                         $my_url = $a->get_baseurl() . '/profile/' . $user[0]['nickname'];
 189
 190                         openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
 191                         $params['source_url'] = bin2hex($params['source_url']);
 192
 193                         if($aes_allow && function_exists('openssl_encrypt')) {
 194                                 openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
 195                                 $params['aes_key'] = bin2hex($params['aes_key']);
 196                                 $params['public_key'] = bin2hex(openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key));
 197                         }
 198
 199                         $params['dfrn_version'] = DFRN_PROTOCOL_VERSION ;
 200                         if($duplex == 1)
 201                                 $params['duplex'] = 1;
 202
 203                         if($user[0]['page-flags'] == PAGE_COMMUNITY)
 204                                 $params['page'] = 1;
 205
 206                         logger('dfrn_confirm: Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA);
 207
 208                         /**
 209                          *
 210                          * POST all this stuff to the other site.
 211                          * Temporarily raise the network timeout to 120 seconds because the default 60
 212                          * doesn't always give the other side quite enough time to decrypt everything.
 213                          *
 214                          */
 215
 216                         $a->config['system']['curl_timeout'] = 120;
 217
 218                         $res = post_url($dfrn_confirm,$params);
 219
 220                         logger('dfrn_confirm: Confirm: received data: ' . $res, LOGGER_DATA);
 221
 222                         // Now figure out what they responded. Try to be robust if the remote site is
 223                         // having difficulty and throwing up errors of some kind.
 224
 225                         $leading_junk = substr($res,0,strpos($res,'<?xml'));
 226
 227                         $res = substr($res,strpos($res,'<?xml'));
 228                         if(! strlen($res)) {
 229
 230                                         // No XML at all, this exchange is messed up really bad.
 231                                         // We shouldn't proceed, because the xml parser might choke,
 232                                         // and $status is going to be zero, which indicates success.
 233                                         // We can hardly call this a success.
 234
 235                                 notice( t('Response from remote site was not understood.') . EOL);
 236                                 return;
 237                         }
 238
 239                         if(strlen($leading_junk) && get_config('system','debugging')) {
 240
 241                                         // This might be more common. Mixed error text and some XML.
 242                                         // If we're configured for debugging, show the text. Proceed in either case.
 243
 244                                 notice( t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL );
 245                         }
 246
 247                         $xml = parse_xml_string($res);
 248                         $status = (int) $xml->status;
 249                         $message = unxmlify($xml->message);   // human readable text of what may have gone wrong.
 250                         switch($status) {
 251                                 case 0:
 252                                         info( t("Confirmation completed successfully.") . EOL);
 253                                         if(strlen($message))
 254                                                 notice( t('Remote site reported: ') . $message . EOL);
 255                                         break;
 256                                 case 1:
 257                                         // birthday paradox - generate new dfrn-id and fall through.
 258                                         $new_dfrn_id = random_string();
 259                                         $r = q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d LIMIT 1",
 260                                                 dbesc($new_dfrn_id),
 261                                                 intval($contact_id),
 262                                                 intval($uid)
 263                                         );
 264
 265                                 case 2:
 266                                         notice( t("Temporary failure. Please wait and try again.") . EOL);
 267                                         if(strlen($message))
 268                                                 notice( t('Remote site reported: ') . $message . EOL);
 269                                         break;
 270
 271
 272                                 case 3:
 273                                         notice( t("Introduction failed or was revoked.") . EOL);
 274                                         if(strlen($message))
 275                                                 notice( t('Remote site reported: ') . $message . EOL);
 276                                         break;
 277                                 }
 278
 279                         if(($status == 0) && ($intro_id)) {
 280
 281                                 // Success. Delete the notification.
 282
 283                                 $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 284                                         intval($intro_id),
 285                                         intval($uid)
 286                                 );
 287
 288                         }
 289
 290                         if($status != 0)
 291                                 return;
 292                 }
 293
 294
 295                 /*
 296                  *
 297                  * We have now established a relationship with the other site.
 298                  * Let's make our own personal copy of their profile photo so we don't have
 299                  * to always load it from their site.
 300                  *
 301                  * We will also update the contact record with the nature and scope of the relationship.
 302                  *
 303                  */
 304
 305                 require_once('include/Photo.php');
 306
 307                 $photos = import_profile_photo($contact['photo'],$uid,$contact_id);
 308
 309                 logger('dfrn_confirm: confirm - imported photos');
 310
 311                 if($network === NETWORK_DFRN) {
 312
 313                         $new_relation = CONTACT_IS_FOLLOWER;
 314                         if(($relation == CONTACT_IS_SHARING) || ($duplex))
 315                                 $new_relation = CONTACT_IS_FRIEND;
 316
 317                         if(($relation == CONTACT_IS_SHARING) && ($duplex))
 318                                 $duplex = 0;
 319
 320                         $r = q("UPDATE `contact` SET
 321                                 `photo` = '%s',
 322                                 `thumb` = '%s',
 323                                 `micro` = '%s',
 324                                 `rel` = %d,
 325                                 `name-date` = '%s',
 326                                 `uri-date` = '%s',
 327                                 `avatar-date` = '%s',
 328                                 `blocked` = 0,
 329                                 `pending` = 0,
 330                                 `duplex` = %d,
 331                                 `hidden` = %d,
 332                                 `network` = 'dfrn' WHERE `id` = %d LIMIT 1
 333                         ",
 334                                 dbesc($photos[0]),
 335                                 dbesc($photos[1]),
 336                                 dbesc($photos[2]),
 337                                 intval($new_relation),
 338                                 dbesc(datetime_convert()),
 339                                 dbesc(datetime_convert()),
 340                                 dbesc(datetime_convert()),
 341                                 intval($duplex),
 342                                 intval($hidden),
 343                                 intval($contact_id)
 344                         );
 345                 }
 346                 else {
 347
 348                         // $network !== NETWORK_DFRN
 349
 350                         $network = (($contact['network']) ? $contact['network'] : NETWORK_OSTATUS);
 351                         $notify = (($contact['notify']) ? $contact['notify'] : '');
 352                         $poll   = (($contact['poll']) ? $contact['poll'] : '');
 353
 354                         if((! $contact['notify']) || (! $contact['poll'])) {
 355                                 $arr = lrdd($contact['url']);
 356                                 if(count($arr)) {
 357                                         foreach($arr as $link) {
 358                                                 if($link['@attributes']['rel'] === 'salmon')
 359                                                         $notify = $link['@attributes']['href'];
 360                                                 if($link['@attributes']['rel'] === NAMESPACE_FEED)
 361                                                         $poll = $link['@attributes']['href'];
 362                                         }
 363                                 }
 364                         }
 365
 366                         $new_relation = $contact['rel'];
 367                         $writable = $contact['writable'];
 368
 369                         if($network === NETWORK_DIASPORA) {
 370                                 if($duplex)
 371                                         $new_relation = CONTACT_IS_FRIEND;
 372                                 else
 373                                         $new_relation = CONTACT_IS_SHARING;
 374
 375                                 if($new_relation != CONTACT_IS_FOLLOWER)
 376                                         $writable = 1;
 377                         }
 378
 379                         $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 380                                 intval($intro_id),
 381                                 intval($uid)
 382                         );
 383
 384
 385                         $r = q("UPDATE `contact` SET `photo` = '%s',
 386                                 `thumb` = '%s',
 387                                 `micro` = '%s',
 388                                 `name-date` = '%s',
 389                                 `uri-date` = '%s',
 390                                 `avatar-date` = '%s',
 391                                 `notify` = '%s',
 392                                 `poll` = '%s',
 393                                 `blocked` = 0,
 394                                 `pending` = 0,
 395                                 `network` = '%s',
 396                                 `writable` = %d,
 397                                 `hidden` = %d,
 398                                 `rel` = %d
 399                                 WHERE `id` = %d LIMIT 1
 400                         ",
 401                                 dbesc($photos[0]),
 402                                 dbesc($photos[1]),
 403                                 dbesc($photos[2]),
 404                                 dbesc(datetime_convert()),
 405                                 dbesc(datetime_convert()),
 406                                 dbesc(datetime_convert()),
 407                                 dbesc($notify),
 408                                 dbesc($poll),
 409                                 dbesc($network),
 410                                 intval($writable),
 411                                 intval($hidden),
 412                                 intval($new_relation),
 413                                 intval($contact_id)
 414                         );
 415                 }
 416
 417                 if($r === false)
 418                                 notice( t('Unable to set contact photo.') . EOL);
 419
 420                 // reload contact info
 421
 422                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 423                         intval($contact_id)
 424                 );
 425                 if(count($r))
 426                         $contact = $r[0];
 427                 else
 428                         $contact = null;
 429
 430
 431                 if((isset($new_relation) && $new_relation == CONTACT_IS_FRIEND)) {
 432
 433                         if(($contact) && ($contact['network'] === NETWORK_DIASPORA)) {
 434                                 require_once('include/diaspora.php');
 435                                 $ret = diaspora_share($user[0],$r[0]);
 436                                 logger('mod_follow: diaspora_share returns: ' . $ret);
 437                         }
 438
 439                         // Send a new friend post if we are allowed to...
 440
 441                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 442                                 intval($uid)
 443                         );
 444
 445                         if((count($r)) && ($r[0]['hide-friends'] == 0) && ($activity) && (! $hidden)) {
 446
 447                                 require_once('include/items.php');
 448
 449                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 450                                         intval($uid)
 451                                 );
 452
 453                                 if(count($self)) {
 454
 455                                         $arr = array();
 456                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $uid);
 457                                         $arr['uid'] = $uid;
 458                                         $arr['contact-id'] = $self[0]['id'];
 459                                         $arr['wall'] = 1;
 460                                         $arr['type'] = 'wall';
 461                                         $arr['gravity'] = 0;
 462                                         $arr['origin'] = 1;
 463                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 464                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 465                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 466
 467                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 468                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 469
 470                                         $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
 471                                         $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
 472
 473                                         $arr['verb'] = ACTIVITY_FRIEND;
 474                                     $arr['object-type'] = ACTIVITY_OBJ_PERSON;
 475                                         $arr['body'] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$BPhoto;
 476
 477                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
 478                                                 . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
 479                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
 480                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
 481                                         $arr['object'] .= '</link></object>' . "\n";
 482
 483                                         $arr['last-child'] = 1;
 484
 485                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 486                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 487                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 488                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 489
 490                                         $i = item_store($arr);
 491                                         if($i)
 492                                         proc_run('php',"include/notifier.php","activity","$i");
 493                                 }
 494                         }
 495                 }
 496
 497
 498                 $g = q("select def_gid from user where uid = %d limit 1",
 499                         intval($uid)
 500                 );
 501                 if($contact && $g && intval($g[0]['def_gid'])) {
 502                         require_once('include/group.php');
 503                         group_add_member($uid,'',$contact['id'],$g[0]['def_gid']);
 504                 }
 505
 506                 // Let's send our user to the contact editor in case they want to
 507                 // do anything special with this new friend.
 508
 509                 if($handsfree === null)
 510                         goaway($a->get_baseurl() . '/contacts/' . intval($contact_id));
 511                 else
 512                         return;
 513                 //NOTREACHED
 514         }
 515
 516         /**
 517          *
 518          *
 519          * End of Scenario 1. [Local confirmation of remote friend request].
 520          *
 521          * Begin Scenario 2. This is the remote response to the above scenario.
 522          * This will take place on the site that originally initiated the friend request.
 523          * In the section above where the confirming party makes a POST and
 524          * retrieves xml status information, they are communicating with the following code.
 525          *
 526          */
 527
 528         if(x($_POST,'source_url')) {
 529
 530                 // We are processing an external confirmation to an introduction created by our user.
 531
 532                 $public_key = ((x($_POST,'public_key'))   ? $_POST['public_key']           : '');
 533                 $dfrn_id    = ((x($_POST,'dfrn_id'))      ? hex2bin($_POST['dfrn_id'])     : '');
 534                 $source_url = ((x($_POST,'source_url'))   ? hex2bin($_POST['source_url'])  : '');
 535                 $aes_key    = ((x($_POST,'aes_key'))      ? $_POST['aes_key']              : '');
 536                 $duplex     = ((x($_POST,'duplex'))       ? intval($_POST['duplex'])       : 0 );
 537                 $page       = ((x($_POST,'page'))         ? intval($_POST['page'])         : 0 );
 538                 $version_id = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
 539
 540                 logger('dfrn_confirm: requestee contacted: ' . $node);
 541
 542                 logger('dfrn_confirm: request: POST=' . print_r($_POST,true), LOGGER_DATA);
 543
 544                 // If $aes_key is set, both of these items require unpacking from the hex transport encoding.
 545
 546                 if(x($aes_key)) {
 547                         $aes_key = hex2bin($aes_key);
 548                         $public_key = hex2bin($public_key);
 549                 }
 550
 551                 // Find our user's account
 552
 553                 $r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
 554                         dbesc($node));
 555
 556                 if(! count($r)) {
 557                         $message = sprintf(t('No user record found for \'%s\' '), $node);
 558                         xml_status(3,$message); // failure
 559                         // NOTREACHED
 560                 }
 561
 562                 $my_prvkey = $r[0]['prvkey'];
 563                 $local_uid = $r[0]['uid'];
 564
 565
 566                 if(! strstr($my_prvkey,'PRIVATE KEY')) {
 567                         $message = t('Our site encryption key is apparently messed up.');
 568                         xml_status(3,$message);
 569                 }
 570
 571                 // verify everything
 572
 573                 $decrypted_source_url = "";
 574                 openssl_private_decrypt($source_url,$decrypted_source_url,$my_prvkey);
 575
 576
 577                 if(! strlen($decrypted_source_url)) {
 578                         $message = t('Empty site URL was provided or URL could not be decrypted by us.');
 579                         xml_status(3,$message);
 580                         // NOTREACHED
 581                 }
 582
 583                 $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 584                         dbesc($decrypted_source_url),
 585                         intval($local_uid)
 586                 );
 587                 if(! count($ret)) {
 588                         if(strstr($decrypted_source_url,'http:'))
 589                                 $newurl = str_replace('http:','https:',$decrypted_source_url);
 590                         else
 591                                 $newurl = str_replace('https:','http:',$decrypted_source_url);
 592
 593                         $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 594                                 dbesc($newurl),
 595                                 intval($local_uid)
 596                         );
 597                         if(! count($ret)) {
 598                                 // this is either a bogus confirmation (?) or we deleted the original introduction.
 599                                 $message = t('Contact record was not found for you on our site.');
 600                                 xml_status(3,$message);
 601                                 return; // NOTREACHED
 602                         }
 603                 }
 604
 605                 $relation = $ret[0]['rel'];
 606
 607                 // Decrypt all this stuff we just received
 608
 609                 $foreign_pubkey = $ret[0]['site-pubkey'];
 610                 $dfrn_record    = $ret[0]['id'];
 611
 612                 if(! $foreign_pubkey) {
 613                         $message = sprintf( t('Site public key not available in contact record for URL %s.'), $newurl);
 614                         xml_status(3,$message);
 615                 }
 616
 617                 $decrypted_dfrn_id = "";
 618                 openssl_public_decrypt($dfrn_id,$decrypted_dfrn_id,$foreign_pubkey);
 619
 620                 if(strlen($aes_key)) {
 621                         $decrypted_aes_key = "";
 622                         openssl_private_decrypt($aes_key,$decrypted_aes_key,$my_prvkey);
 623                         $dfrn_pubkey = openssl_decrypt($public_key,'AES-256-CBC',$decrypted_aes_key);
 624                 }
 625                 else {
 626                         $dfrn_pubkey = $public_key;
 627                 }
 628
 629                 $r = q("SELECT * FROM `contact` WHERE `dfrn-id` = '%s' LIMIT 1",
 630                         dbesc($decrypted_dfrn_id)
 631                 );
 632                 if(count($r)) {
 633                         $message = t('The ID provided by your system is a duplicate on our system. It should work if you try again.');
 634                         xml_status(1,$message); // Birthday paradox - duplicate dfrn-id
 635                         // NOTREACHED
 636                 }
 637
 638                 $r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d LIMIT 1",
 639                         dbesc($decrypted_dfrn_id),
 640                         dbesc($dfrn_pubkey),
 641                         intval($dfrn_record)
 642                 );
 643                 if(! count($r)) {
 644                         $message = t('Unable to set your contact credentials on our system.');
 645                         xml_status(3,$message);
 646                 }
 647
 648                 // It's possible that the other person also requested friendship.
 649                 // If it is a duplex relationship, ditch the issued-id if one exists.
 650
 651                 if($duplex) {
 652                         $r = q("UPDATE `contact` SET `issued-id` = '' WHERE `id` = %d LIMIT 1",
 653                                 intval($dfrn_record)
 654                         );
 655                 }
 656
 657                 // We're good but now we have to scrape the profile photo and send notifications.
 658
 659
 660
 661                 $r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
 662                         intval($dfrn_record));
 663
 664                 if(count($r))
 665                         $photo = $r[0]['photo'];
 666                 else
 667                         $photo = $a->get_baseurl() . '/images/person-175.jpg';
 668
 669                 require_once("Photo.php");
 670
 671                 $photos = import_profile_photo($photo,$local_uid,$dfrn_record);
 672
 673                 logger('dfrn_confirm: request - photos imported');
 674
 675                 $new_relation = CONTACT_IS_SHARING;
 676                 if(($relation == CONTACT_IS_FOLLOWER) || ($duplex))
 677                         $new_relation = CONTACT_IS_FRIEND;
 678
 679                 if(($relation == CONTACT_IS_FOLLOWER) && ($duplex))
 680                         $duplex = 0;
 681
 682                 $r = q("UPDATE `contact` SET
 683                         `photo` = '%s',
 684                         `thumb` = '%s',
 685                         `micro` = '%s',
 686                         `rel` = %d,
 687                         `name-date` = '%s',
 688                         `uri-date` = '%s',
 689                         `avatar-date` = '%s',
 690                         `blocked` = 0,
 691                         `pending` = 0,
 692                         `duplex` = %d,
 693                         `forum` = %d,
 694                         `network` = '%s' WHERE `id` = %d LIMIT 1
 695                 ",
 696                         dbesc($photos[0]),
 697                         dbesc($photos[1]),
 698                         dbesc($photos[2]),
 699                         intval($new_relation),
 700                         dbesc(datetime_convert()),
 701                         dbesc(datetime_convert()),
 702                         dbesc(datetime_convert()),
 703                         intval($duplex),
 704                         intval($page),
 705                         dbesc(NETWORK_DFRN),
 706                         intval($dfrn_record)
 707                 );
 708                 if($r === false) {    // indicates schema is messed up or total db failure
 709                         $message = t('Unable to update your contact profile details on our system');
 710                         xml_status(3,$message);
 711                 }
 712
 713                 // Otherwise everything seems to have worked and we are almost done. Yay!
 714                 // Send an email notification
 715
 716                 logger('dfrn_confirm: request: info updated');
 717
 718                 $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 719                         WHERE `contact`.`id` = %d LIMIT 1",
 720                         intval($dfrn_record)
 721                 );
 722
 723                 if(count($r))
 724                         $combined = $r[0];
 725
 726                 if((count($r)) && ($r[0]['notify-flags'] & NOTIFY_CONFIRM)) {
 727
 728                         push_lang($r[0]['language']);
 729                         $tpl = (($new_relation == CONTACT_IS_FRIEND)
 730                                 ? get_intltext_template('friend_complete_eml.tpl')
 731                                 : get_intltext_template('intro_complete_eml.tpl'));
 732
 733                         $email_tpl = replace_macros($tpl, array(
 734                                 '$sitename' => $a->config['sitename'],
 735                                 '$siteurl' =>  $a->get_baseurl(),
 736                                 '$username' => $r[0]['username'],
 737                                 '$email' => $r[0]['email'],
 738                                 '$fn' => $r[0]['name'],
 739                                 '$dfrn_url' => $r[0]['url'],
 740                                 '$uid' => $newuid )
 741                         );
 742
 743                         $res = mail($r[0]['email'], sprintf( t("Connection accepted at %s") , $a->config['sitename']),
 744                                 $email_tpl,
 745                                 'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] . "\n"
 746                                 . 'Content-type: text/plain; charset=UTF-8' . "\n"
 747                                 . 'Content-transfer-encoding: 8bit' );
 748
 749                         if(!$res) {
 750                                 // pointless throwing an error here and confusing the person at the other end of the wire.
 751                         }
 752                         pop_lang();
 753                 }
 754
 755                 // Send a new friend post if we are allowed to...
 756
 757                 if($page && intval(get_pconfig($local_uid,'system','post_joingroup'))) {
 758                         $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 759                                 intval($local_uid)
 760                         );
 761
 762                         if((count($r)) && ($r[0]['hide-friends'] == 0)) {
 763
 764                                 require_once('include/items.php');
 765
 766                                 $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 767                                         intval($local_uid)
 768                                 );
 769
 770                                 if(count($self)) {
 771
 772                                         $arr = array();
 773                                         $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $local_uid);
 774                                         $arr['uid'] = $local_uid;
 775                                         $arr['contact-id'] = $self[0]['id'];
 776                                         $arr['wall'] = 1;
 777                                         $arr['type'] = 'wall';
 778                                         $arr['gravity'] = 0;
 779                                         $arr['origin'] = 1;
 780                                         $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 781                                         $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 782                                         $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 783
 784                                         $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 785                                         $APhoto = '[url=' . $self[0]['url'] . ']' . '[img]' . $self[0]['thumb'] . '[/img][/url]';
 786
 787                                         $B = '[url=' . $combined['url'] . ']' . $combined['name'] . '[/url]';
 788                                         $BPhoto = '[url=' . $combined['url'] . ']' . '[img]' . $combined['thumb'] . '[/img][/url]';
 789
 790                                         $arr['verb'] = ACTIVITY_JOIN;
 791                                         $arr['object-type'] = ACTIVITY_OBJ_GROUP;
 792                                         $arr['body'] =  sprintf( t('%1$s has joined %2$s'), $A, $B)."\n\n\n" .$BPhoto;
 793                                         $arr['object'] = '<object><type>' . ACTIVITY_OBJ_GROUP . '</type><title>' . $combined['name'] . '</title>'
 794                                                 . '<id>' . $combined['url'] . '/' . $combined['name'] . '</id>';
 795                                         $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $combined['url'] . '" />' . "\n");
 796                                         $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $combined['thumb'] . '" />' . "\n");
 797                                         $arr['object'] .= '</link></object>' . "\n";
 798
 799                                         $arr['last-child'] = 1;
 800
 801                                         $arr['allow_cid'] = $user[0]['allow_cid'];
 802                                         $arr['allow_gid'] = $user[0]['allow_gid'];
 803                                         $arr['deny_cid']  = $user[0]['deny_cid'];
 804                                         $arr['deny_gid']  = $user[0]['deny_gid'];
 805
 806                                         $i = item_store($arr);
 807                                         if($i)
 808                                         proc_run('php',"include/notifier.php","activity","$i");
 809
 810                                 }
 811                         }
 812                 }
 813                 xml_status(0); // Success
 814                 return; // NOTREACHED
 815
 816                         ////////////////////// End of this scenario ///////////////////////////////////////////////
 817         }
 818
 819         // somebody arrived here by mistake or they are fishing. Send them to the homepage.
 820
 821         goaway(z_root());
 822         // NOTREACHED
 823
 824 }