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                 }
  75                 else {
  76                         $dfrn_id  = ((x($_POST,'dfrn_id'))    ? notags(trim($_POST['dfrn_id'])) : "");
  77                         $intro_id = ((x($_POST,'intro_id'))   ? intval($_POST['intro_id'])      : 0 );
  78                         $duplex   = ((x($_POST,'duplex'))     ? intval($_POST['duplex'])        : 0 );
  79                         $cid      = ((x($_POST,'contact_id')) ? intval($_POST['contact_id'])    : 0 );
  80                 }
  81
  82                 /**
  83                  *
  84                  * Ensure that dfrn_id has precedence when we go to find the contact record.
  85                  * We only want to search based on contact id if there is no dfrn_id,
  86                  * e.g. for OStatus network followers.
  87                  *
  88                  */
  89
  90                 if(strlen($dfrn_id))
  91                         $cid = 0;
  92
  93                 logger('dfrn_confirm: Confirming request for dfrn_id (issued) ' . $dfrn_id);
  94                 if($cid)
  95                         logger('dfrn_confirm: Confirming follower with contact_id: ' . $cid);
  96
  97
  98                 /**
  99                  *
 100                  * The other person will have been issued an ID when they first requested friendship.
 101                  * Locate their record. At this time, their record will have both pending and blocked set to 1.
 102                  * There won't be any dfrn_id if this is a network follower, so use the contact_id instead.
 103                  *
 104                  */
 105
 106                 $r = q("SELECT * FROM `contact` WHERE ( ( `issued-id` != '' AND `issued-id` = '%s' ) OR ( `id` = %d AND `id` != 0 ) ) AND `uid` = %d LIMIT 1",
 107                         dbesc($dfrn_id),
 108                         intval($cid),
 109                         intval($uid)
 110                 );
 111
 112                 if(! count($r)) {
 113                         logger('dfrn_confirm: Contact not found in DB.');
 114                         notice( t('Contact not found.') . EOL );
 115                         return;
 116                 }
 117
 118                 $contact = $r[0];
 119
 120                 $contact_id   = $contact['id'];
 121                 $relation     = $contact['rel'];
 122                 $site_pubkey  = $contact['site-pubkey'];
 123                 $dfrn_confirm = $contact['confirm'];
 124                 $aes_allow    = $contact['aes_allow'];
 125
 126                 $network = ((strlen($contact['issued-id'])) ? NETWORK_DFRN : NETWORK_OSTATUS);
 127
 128                 if($contact['network'])
 129                         $network = $contact['network'];
 130
 131                 if($network === NETWORK_DFRN) {
 132
 133                         /**
 134                          *
 135                          * Generate a key pair for all further communications with this person.
 136                          * We have a keypair for every contact, and a site key for unknown people.
 137                          * This provides a means to carry on relationships with other people if
 138                          * any single key is compromised. It is a robust key. We're much more
 139                          * worried about key leakage than anybody cracking it.
 140                          *
 141                          */
 142
 143                         $res = openssl_pkey_new(array(
 144                                 'digest_alg' => 'sha1',
 145                                 'private_key_bits' => 4096,
 146                                 'encrypt_key' => false )
 147                         );
 148
 149                         $private_key = '';
 150
 151                         openssl_pkey_export($res, $private_key);
 152
 153                         $pubkey = openssl_pkey_get_details($res);
 154                         $public_key = $pubkey["key"];
 155
 156                         // Save the private key. Send them the public key.
 157
 158                         $r = q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d LIMIT 1",
 159                                 dbesc($private_key),
 160                                 intval($contact_id),
 161                                 intval($uid)
 162                         );
 163
 164                         $params = array();
 165
 166                         /**
 167                          *
 168                          * Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our
 169                          * site private key (person on the other end can decrypt it with our site public key).
 170                          * Then encrypt our profile URL with the other person's site public key. They can decrypt
 171                          * it with their site private key. If the decryption on the other end fails for either
 172                          * item, it indicates tampering or key failure on at least one site and we will not be
 173                          * able to provide a secure communication pathway.
 174                          *
 175                          * If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3
 176                          * or later) then we encrypt the personal public key we send them using AES-256-CBC and a
 177                          * random key which is encrypted with their site public key.
 178                          *
 179                          */
 180
 181                         $src_aes_key = random_string();
 182
 183                         $result = '';
 184                         openssl_private_encrypt($dfrn_id,$result,$user[0]['prvkey']);
 185
 186                         $params['dfrn_id'] = bin2hex($result);
 187                         $params['public_key'] = $public_key;
 188
 189
 190                         $my_url = $a->get_baseurl() . '/profile/' . $user[0]['nickname'];
 191
 192                         openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
 193                         $params['source_url'] = bin2hex($params['source_url']);
 194
 195                         if($aes_allow && function_exists('openssl_encrypt')) {
 196                                 openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
 197                                 $params['aes_key'] = bin2hex($params['aes_key']);
 198                                 $params['public_key'] = bin2hex(openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key));
 199                         }
 200
 201                         $params['dfrn_version'] = DFRN_PROTOCOL_VERSION ;
 202                         if($duplex == 1)
 203                                 $params['duplex'] = 1;
 204
 205                         logger('dfrn_confirm: Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA);
 206
 207                         /**
 208                          *
 209                          * POST all this stuff to the other site.
 210                          * Temporarily raise the network timeout to 120 seconds because the default 60
 211                          * doesn't always give the other side quite enough time to decrypt everything.
 212                          *
 213                          */
 214
 215                         $a->config['system']['curl_timeout'] = 120;
 216
 217                         $res = post_url($dfrn_confirm,$params);
 218
 219                         logger('dfrn_confirm: Confirm: received data: ' . $res, LOGGER_DATA);
 220
 221                         // Now figure out what they responded. Try to be robust if the remote site is
 222                         // having difficulty and throwing up errors of some kind.
 223
 224                         $leading_junk = substr($res,0,strpos($res,'<?xml'));
 225
 226                         $res = substr($res,strpos($res,'<?xml'));
 227                         if(! strlen($res)) {
 228
 229                                         // No XML at all, this exchange is messed up really bad.
 230                                         // We shouldn't proceed, because the xml parser might choke,
 231                                         // and $status is going to be zero, which indicates success.
 232                                         // We can hardly call this a success.
 233
 234                                 notice( t('Response from remote site was not understood.') . EOL);
 235                                 return;
 236                         }
 237
 238                         if(strlen($leading_junk) && get_config('system','debugging')) {
 239
 240                                         // This might be more common. Mixed error text and some XML.
 241                                         // If we're configured for debugging, show the text. Proceed in either case.
 242
 243                                 notice( t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL );
 244                         }
 245
 246                         $xml = parse_xml_string($res);
 247                         $status = (int) $xml->status;
 248                         $message = unxmlify($xml->message);   // human readable text of what may have gone wrong.
 249                         switch($status) {
 250                                 case 0:
 251                                         notice( t("Confirmation completed successfully.") . EOL);
 252                                         if(strlen($message))
 253                                                 notice( t('Remote site reported: ') . $message . EOL);
 254                                         break;
 255                                 case 1:
 256                                         // birthday paradox - generate new dfrn-id and fall through.
 257                                         $new_dfrn_id = random_string();
 258                                         $r = q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d LIMIT 1",
 259                                                 dbesc($new_dfrn_id),
 260                                                 intval($contact_id),
 261                                                 intval($uid)
 262                                         );
 263
 264                                 case 2:
 265                                         notice( t("Temporary failure. Please wait and try again.") . EOL);
 266                                         if(strlen($message))
 267                                                 notice( t('Remote site reported: ') . $message . EOL);
 268                                         break;
 269
 270
 271                                 case 3:
 272                                         notice( t("Introduction failed or was revoked.") . EOL);
 273                                         if(strlen($message))
 274                                                 notice( t('Remote site reported: ') . $message . EOL);
 275                                         break;
 276                                 }
 277
 278                         if(($status == 0) && ($intro_id)) {
 279
 280                                 // Success. Delete the notification.
 281
 282                                 $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 283                                         intval($intro_id),
 284                                         intval($uid)
 285                                 );
 286
 287                         }
 288
 289                         if($status != 0)
 290                                 return;
 291                 }
 292
 293
 294                 /*
 295                  *
 296                  * We have now established a relationship with the other site.
 297                  * Let's make our own personal copy of their profile photo so we don't have
 298                  * to always load it from their site.
 299                  *
 300                  * We will also update the contact record with the nature and scope of the relationship.
 301                  *
 302                  */
 303
 304                 require_once('include/Photo.php');
 305
 306                 $photos = import_profile_photo($contact['photo'],$uid,$contact_id);
 307
 308                 logger('dfrn_confirm: confirm - imported photos');
 309
 310                 if($network === NETWORK_DFRN) {
 311
 312                         $new_relation = CONTACT_IS_FOLLOWER;
 313                         if(($relation == CONTACT_IS_SHARING) || ($duplex))
 314                                 $new_relation = CONTACT_IS_FRIEND;
 315
 316                         if(($relation == CONTACT_IS_SHARING) && ($duplex))
 317                                 $duplex = 0;
 318
 319                         $r = q("UPDATE `contact` SET `photo` = '%s',
 320                                 `thumb` = '%s',
 321                                 `micro` = '%s',
 322                                 `rel` = %d,
 323                                 `name-date` = '%s',
 324                                 `uri-date` = '%s',
 325                                 `avatar-date` = '%s',
 326                                 `blocked` = 0,
 327                                 `pending` = 0,
 328                                 `duplex` = %d,
 329                                 `network` = 'dfrn' WHERE `id` = %d LIMIT 1
 330                         ",
 331                                 dbesc($photos[0]),
 332                                 dbesc($photos[1]),
 333                                 dbesc($photos[2]),
 334                                 intval($new_relation),
 335                                 dbesc(datetime_convert()),
 336                                 dbesc(datetime_convert()),
 337                                 dbesc(datetime_convert()),
 338                                 intval($duplex),
 339                                 intval($contact_id)
 340                         );
 341                 }
 342                 else {
 343
 344                         // $network !== NETWORK_DFRN
 345
 346                         $network = (($contact['network']) ? $contact['network'] : NETWORK_OSTATUS);
 347                         $notify = (($contact['notify']) ? $contact['notify'] : '');
 348                         $poll   = (($contact['poll']) ? $contact['poll'] : '');
 349
 350                         if((! $contact['notify']) || (! $contact['poll'])) {
 351                                 $arr = lrdd($contact['url']);
 352                                 if(count($arr)) {
 353                                         foreach($arr as $link) {
 354                                                 if($link['@attributes']['rel'] === 'salmon')
 355                                                         $notify = $link['@attributes']['href'];
 356                                                 if($link['@attributes']['rel'] === NAMESPACE_FEED)
 357                                                         $poll = $link['@attributes']['href'];
 358                                         }
 359                                 }
 360                         }
 361
 362                         $new_relation = $contact['rel'];
 363                         $writable = $contact['writable'];
 364
 365                         if($network === NETWORK_DIASPORA) {
 366                                 if($duplex)
 367                                         $new_relation = CONTACT_IS_FRIEND;
 368                                 if($new_relation != CONTACT_IS_FOLLOWER)
 369                                         $writable = 1;
 370                         }
 371
 372                         $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 373                                 intval($intro_id),
 374                                 intval($uid)
 375                         );
 376
 377
 378                         $r = q("UPDATE `contact` SET `photo` = '%s',
 379                                 `thumb` = '%s',
 380                                 `micro` = '%s',
 381                                 `name-date` = '%s',
 382                                 `uri-date` = '%s',
 383                                 `avatar-date` = '%s',
 384                                 `notify` = '%s',
 385                                 `poll` = '%s',
 386                                 `blocked` = 0,
 387                                 `pending` = 0,
 388                                 `network` = '%s',
 389                                 `writable` = %d,
 390                                 `rel` = %d
 391                                 WHERE `id` = %d LIMIT 1
 392                         ",
 393                                 dbesc($photos[0]),
 394                                 dbesc($photos[1]),
 395                                 dbesc($photos[2]),
 396                                 dbesc(datetime_convert()),
 397                                 dbesc(datetime_convert()),
 398                                 dbesc(datetime_convert()),
 399                                 dbesc($notify),
 400                                 dbesc($poll),
 401                                 dbesc($network),
 402                                 intval($writable),
 403                                 intval($new_relation),
 404                                 intval($contact_id)
 405                         );
 406                 }
 407
 408                 if($r === false)
 409                                 notice( t('Unable to set contact photo.') . EOL);
 410
 411                 // reload contact info
 412
 413                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 414                         intval($contact_id)
 415                 );
 416                 if(count($r))
 417                         $contact = $r[0];
 418                 else
 419                         $contact = null;
 420
 421                 // Send a new friend post if we are allowed to...
 422
 423                 $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 424                         intval($uid)
 425                 );
 426                 if((count($r)) && ($r[0]['hide-friends'] == 0) && (is_array($contact)) &&  isset($new_relation) && ($new_relation == CONTACT_IS_FRIEND)) {
 427
 428                         if($r[0]['network'] === NETWORK_DIASPORA) {
 429                                 require_once('include/diaspora.php');
 430                                 $ret = diaspora_share($user[0],$r[0]);
 431                                 logger('mod_follow: diaspora_share returns: ' . $ret);
 432                         }
 433
 434                         require_once('include/items.php');
 435
 436                         $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 437                                 intval($uid)
 438                         );
 439
 440                         if(count($self)) {
 441
 442                                 $arr = array();
 443                                 $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $uid);
 444                                 $arr['uid'] = $uid;
 445                                 $arr['contact-id'] = $self[0]['id'];
 446                                 $arr['wall'] = 1;
 447                                 $arr['type'] = 'wall';
 448                                 $arr['gravity'] = 0;
 449                                 $arr['origin'] = 1;
 450                                 $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 451                                 $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 452                                 $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 453                                 $arr['verb'] = ACTIVITY_FRIEND;
 454                                 $arr['object-type'] = ACTIVITY_OBJ_PERSON;
 455
 456                                 $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 457                                 $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
 458                                 $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
 459                                 $arr['body'] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$Bphoto;
 460
 461                                 $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
 462                                         . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
 463                                 $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
 464                                 $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
 465                                 $arr['object'] .= '</link></object>' . "\n";
 466                                 $arr['last-child'] = 1;
 467
 468                                 $arr['allow_cid'] = $user[0]['allow_cid'];
 469                                 $arr['allow_gid'] = $user[0]['allow_gid'];
 470                                 $arr['deny_cid']  = $user[0]['deny_cid'];
 471                                 $arr['deny_gid']  = $user[0]['deny_gid'];
 472
 473                                 $i = item_store($arr);
 474                                 if($i)
 475                                 proc_run('php',"include/notifier.php","activity","$i");
 476
 477                         }
 478
 479                 }
 480                 // Let's send our user to the contact editor in case they want to
 481                 // do anything special with this new friend.
 482
 483                 if($handsfree === null)
 484                         goaway($a->get_baseurl() . '/contacts/' . intval($contact_id));
 485                 else
 486                         return;
 487                 //NOTREACHED
 488         }
 489
 490         /**
 491          *
 492          *
 493          * End of Scenario 1. [Local confirmation of remote friend request].
 494          *
 495          * Begin Scenario 2. This is the remote response to the above scenario.
 496          * This will take place on the site that originally initiated the friend request.
 497          * In the section above where the confirming party makes a POST and
 498          * retrieves xml status information, they are communicating with the following code.
 499          *
 500          */
 501
 502         if(x($_POST,'source_url')) {
 503
 504                 // We are processing an external confirmation to an introduction created by our user.
 505
 506                 $public_key = ((x($_POST,'public_key'))   ? $_POST['public_key']           : '');
 507                 $dfrn_id    = ((x($_POST,'dfrn_id'))      ? hex2bin($_POST['dfrn_id'])     : '');
 508                 $source_url = ((x($_POST,'source_url'))   ? hex2bin($_POST['source_url'])  : '');
 509                 $aes_key    = ((x($_POST,'aes_key'))      ? $_POST['aes_key']              : '');
 510                 $duplex     = ((x($_POST,'duplex'))       ? intval($_POST['duplex'])       : 0 );
 511                 $version_id = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
 512
 513                 logger('dfrn_confirm: requestee contacted: ' . $node);
 514
 515                 logger('dfrn_confirm: request: POST=' . print_r($_POST,true), LOGGER_DATA);
 516
 517                 // If $aes_key is set, both of these items require unpacking from the hex transport encoding.
 518
 519                 if(x($aes_key)) {
 520                         $aes_key = hex2bin($aes_key);
 521                         $public_key = hex2bin($public_key);
 522                 }
 523
 524                 // Find our user's account
 525
 526                 $r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
 527                         dbesc($node));
 528
 529                 if(! count($r)) {
 530                         $message = sprintf(t('No user record found for \'%s\' '), $node);
 531                         xml_status(3,$message); // failure
 532                         // NOTREACHED
 533                 }
 534
 535                 $my_prvkey = $r[0]['prvkey'];
 536                 $local_uid = $r[0]['uid'];
 537
 538
 539                 if(! strstr($my_prvkey,'PRIVATE KEY')) {
 540                         $message = t('Our site encryption key is apparently messed up.');
 541                         xml_status(3,$message);
 542                 }
 543
 544                 // verify everything
 545
 546                 $decrypted_source_url = "";
 547                 openssl_private_decrypt($source_url,$decrypted_source_url,$my_prvkey);
 548
 549
 550                 if(! strlen($decrypted_source_url)) {
 551                         $message = t('Empty site URL was provided or URL could not be decrypted by us.');
 552                         xml_status(3,$message);
 553                         // NOTREACHED
 554                 }
 555
 556                 $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 557                         dbesc($decrypted_source_url),
 558                         intval($local_uid)
 559                 );
 560                 if(! count($ret)) {
 561                         if(strstr($decrypted_source_url,'http:'))
 562                                 $newurl = str_replace('http:','https:',$decrypted_source_url);
 563                         else
 564                                 $newurl = str_replace('https:','http:',$decrypted_source_url);
 565
 566                         $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 567                                 dbesc($newurl),
 568                                 intval($local_uid)
 569                         );
 570                         if(! count($ret)) {
 571                                 // this is either a bogus confirmation (?) or we deleted the original introduction.
 572                                 $message = t('Contact record was not found for you on our site.');
 573                                 xml_status(3,$message);
 574                                 return; // NOTREACHED
 575                         }
 576                 }
 577
 578                 $relation = $ret[0]['rel'];
 579
 580                 // Decrypt all this stuff we just received
 581
 582                 $foreign_pubkey = $ret[0]['site-pubkey'];
 583                 $dfrn_record    = $ret[0]['id'];
 584
 585                 if(! $foreign_pubkey) {
 586                         $message = sprintf( t('Site public key not available in contact record for URL %s.'), $newurl);
 587                         xml_status(3,$message);
 588                 }
 589
 590                 $decrypted_dfrn_id = "";
 591                 openssl_public_decrypt($dfrn_id,$decrypted_dfrn_id,$foreign_pubkey);
 592
 593                 if(strlen($aes_key)) {
 594                         $decrypted_aes_key = "";
 595                         openssl_private_decrypt($aes_key,$decrypted_aes_key,$my_prvkey);
 596                         $dfrn_pubkey = openssl_decrypt($public_key,'AES-256-CBC',$decrypted_aes_key);
 597                 }
 598                 else {
 599                         $dfrn_pubkey = $public_key;
 600                 }
 601
 602                 $r = q("SELECT * FROM `contact` WHERE `dfrn-id` = '%s' LIMIT 1",
 603                         dbesc($decrypted_dfrn_id)
 604                 );
 605                 if(count($r)) {
 606                         $message = t('The ID provided by your system is a duplicate on our system. It should work if you try again.');
 607                         xml_status(1,$message); // Birthday paradox - duplicate dfrn-id
 608                         // NOTREACHED
 609                 }
 610
 611                 $r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d LIMIT 1",
 612                         dbesc($decrypted_dfrn_id),
 613                         dbesc($dfrn_pubkey),
 614                         intval($dfrn_record)
 615                 );
 616                 if(! count($r)) {
 617                         $message = t('Unable to set your contact credentials on our system.');
 618                         xml_status(3,$message);
 619                 }
 620
 621                 // We're good but now we have to scrape the profile photo and send notifications.
 622
 623
 624
 625                 $r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
 626                         intval($dfrn_record));
 627
 628                 if(count($r))
 629                         $photo = $r[0]['photo'];
 630                 else
 631                         $photo = $a->get_baseurl() . '/images/default-profile.jpg';
 632
 633                 require_once("Photo.php");
 634
 635                 $photos = import_profile_photo($photo,$local_uid,$dfrn_record);
 636
 637                 logger('dfrn_confirm: request - photos imported');
 638
 639                 $new_relation = CONTACT_IS_SHARING;
 640                 if(($relation == CONTACT_IS_FOLLOWER) || ($duplex))
 641                         $new_relation = CONTACT_IS_FRIEND;
 642
 643                 if(($relation == CONTACT_IS_FOLLOWER) && ($duplex))
 644                         $duplex = 0;
 645
 646                 $r = q("UPDATE `contact` SET
 647                         `photo` = '%s',
 648                         `thumb` = '%s',
 649                         `micro` = '%s',
 650                         `rel` = %d,
 651                         `name-date` = '%s',
 652                         `uri-date` = '%s',
 653                         `avatar-date` = '%s',
 654                         `blocked` = 0,
 655                         `pending` = 0,
 656                         `duplex` = %d,
 657                         `network` = '%s' WHERE `id` = %d LIMIT 1
 658                 ",
 659                         dbesc($photos[0]),
 660                         dbesc($photos[1]),
 661                         dbesc($photos[2]),
 662                         intval($new_relation),
 663                         dbesc(datetime_convert()),
 664                         dbesc(datetime_convert()),
 665                         dbesc(datetime_convert()),
 666                         intval($duplex),
 667                         dbesc(NETWORK_DFRN),
 668                         intval($dfrn_record)
 669                 );
 670                 if($r === false) {    // indicates schema is messed up or total db failure
 671                         $message = t('Unable to update your contact profile details on our system');
 672                         xml_status(3,$message);
 673                 }
 674
 675                 // Otherwise everything seems to have worked and we are almost done. Yay!
 676                 // Send an email notification
 677
 678                 logger('dfrn_confirm: request: info updated');
 679
 680                 $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 681                         WHERE `contact`.`id` = %d LIMIT 1",
 682                         intval($dfrn_record)
 683                 );
 684                 if((count($r)) && ($r[0]['notify-flags'] & NOTIFY_CONFIRM)) {
 685
 686                         push_lang($r[0]['language']);
 687                         $tpl = (($new_relation == CONTACT_IS_FRIEND)
 688                                 ? get_intltext_template('friend_complete_eml.tpl')
 689                                 : get_intltext_template('intro_complete_eml.tpl'));
 690
 691                         $email_tpl = replace_macros($tpl, array(
 692                                 '$sitename' => $a->config['sitename'],
 693                                 '$siteurl' =>  $a->get_baseurl(),
 694                                 '$username' => $r[0]['username'],
 695                                 '$email' => $r[0]['email'],
 696                                 '$fn' => $r[0]['name'],
 697                                 '$dfrn_url' => $r[0]['url'],
 698                                 '$uid' => $newuid )
 699                         );
 700
 701                         $res = mail($r[0]['email'], sprintf( t("Connection accepted at %s") , $a->config['sitename']),
 702                                 $email_tpl,
 703                                 'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] . "\n"
 704                                 . 'Content-type: text/plain; charset=UTF-8' . "\n"
 705                                 . 'Content-transfer-encoding: 8bit' );
 706
 707                         if(!$res) {
 708                                 // pointless throwing an error here and confusing the person at the other end of the wire.
 709                         }
 710                         pop_lang();
 711                 }
 712                 xml_status(0); // Success
 713                 return; // NOTREACHED
 714
 715                         ////////////////////// End of this scenario ///////////////////////////////////////////////
 716         }
 717
 718         // somebody arrived here by mistake or they are fishing. Send them to the homepage.
 719
 720         goaway(z_root());
 721         // NOTREACHED
 722
 723 }