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                 }
  76                 else {
  77                         $dfrn_id  = ((x($_POST,'dfrn_id'))    ? notags(trim($_POST['dfrn_id'])) : "");
  78                         $intro_id = ((x($_POST,'intro_id'))   ? intval($_POST['intro_id'])      : 0 );
  79                         $duplex   = ((x($_POST,'duplex'))     ? intval($_POST['duplex'])        : 0 );
  80                         $cid      = ((x($_POST,'contact_id')) ? intval($_POST['contact_id'])    : 0 );
  81                         $hidden   = ((x($_POST,'hidden'))     ? intval($_POST['hidden'])        : 0 );
  82                 }
  83
  84                 /**
  85                  *
  86                  * Ensure that dfrn_id has precedence when we go to find the contact record.
  87                  * We only want to search based on contact id if there is no dfrn_id,
  88                  * e.g. for OStatus network followers.
  89                  *
  90                  */
  91
  92                 if(strlen($dfrn_id))
  93                         $cid = 0;
  94
  95                 logger('dfrn_confirm: Confirming request for dfrn_id (issued) ' . $dfrn_id);
  96                 if($cid)
  97                         logger('dfrn_confirm: Confirming follower with contact_id: ' . $cid);
  98
  99
 100                 /**
 101                  *
 102                  * The other person will have been issued an ID when they first requested friendship.
 103                  * Locate their record. At this time, their record will have both pending and blocked set to 1.
 104                  * There won't be any dfrn_id if this is a network follower, so use the contact_id instead.
 105                  *
 106                  */
 107
 108                 $r = q("SELECT * FROM `contact` WHERE ( ( `issued-id` != '' AND `issued-id` = '%s' ) OR ( `id` = %d AND `id` != 0 ) ) AND `uid` = %d LIMIT 1",
 109                         dbesc($dfrn_id),
 110                         intval($cid),
 111                         intval($uid)
 112                 );
 113
 114                 if(! count($r)) {
 115                         logger('dfrn_confirm: Contact not found in DB.');
 116                         notice( t('Contact not found.') . EOL );
 117                         return;
 118                 }
 119
 120                 $contact = $r[0];
 121
 122                 $contact_id   = $contact['id'];
 123                 $relation     = $contact['rel'];
 124                 $site_pubkey  = $contact['site-pubkey'];
 125                 $dfrn_confirm = $contact['confirm'];
 126                 $aes_allow    = $contact['aes_allow'];
 127
 128                 $network = ((strlen($contact['issued-id'])) ? NETWORK_DFRN : NETWORK_OSTATUS);
 129
 130                 if($contact['network'])
 131                         $network = $contact['network'];
 132
 133                 if($network === NETWORK_DFRN) {
 134
 135                         /**
 136                          *
 137                          * Generate a key pair for all further communications with this person.
 138                          * We have a keypair for every contact, and a site key for unknown people.
 139                          * This provides a means to carry on relationships with other people if
 140                          * any single key is compromised. It is a robust key. We're much more
 141                          * worried about key leakage than anybody cracking it.
 142                          *
 143                          */
 144
 145                         $res = openssl_pkey_new(array(
 146                                 'digest_alg' => 'sha1',
 147                                 'private_key_bits' => 4096,
 148                                 'encrypt_key' => false )
 149                         );
 150
 151                         $private_key = '';
 152
 153                         openssl_pkey_export($res, $private_key);
 154
 155                         $pubkey = openssl_pkey_get_details($res);
 156                         $public_key = $pubkey["key"];
 157
 158                         // Save the private key. Send them the public key.
 159
 160                         $r = q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d LIMIT 1",
 161                                 dbesc($private_key),
 162                                 intval($contact_id),
 163                                 intval($uid)
 164                         );
 165
 166                         $params = array();
 167
 168                         /**
 169                          *
 170                          * Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our
 171                          * site private key (person on the other end can decrypt it with our site public key).
 172                          * Then encrypt our profile URL with the other person's site public key. They can decrypt
 173                          * it with their site private key. If the decryption on the other end fails for either
 174                          * item, it indicates tampering or key failure on at least one site and we will not be
 175                          * able to provide a secure communication pathway.
 176                          *
 177                          * If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3
 178                          * or later) then we encrypt the personal public key we send them using AES-256-CBC and a
 179                          * random key which is encrypted with their site public key.
 180                          *
 181                          */
 182
 183                         $src_aes_key = random_string();
 184
 185                         $result = '';
 186                         openssl_private_encrypt($dfrn_id,$result,$user[0]['prvkey']);
 187
 188                         $params['dfrn_id'] = bin2hex($result);
 189                         $params['public_key'] = $public_key;
 190
 191
 192                         $my_url = $a->get_baseurl() . '/profile/' . $user[0]['nickname'];
 193
 194                         openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
 195                         $params['source_url'] = bin2hex($params['source_url']);
 196
 197                         if($aes_allow && function_exists('openssl_encrypt')) {
 198                                 openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
 199                                 $params['aes_key'] = bin2hex($params['aes_key']);
 200                                 $params['public_key'] = bin2hex(openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key));
 201                         }
 202
 203                         $params['dfrn_version'] = DFRN_PROTOCOL_VERSION ;
 204                         if($duplex == 1)
 205                                 $params['duplex'] = 1;
 206
 207                         logger('dfrn_confirm: Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA);
 208
 209                         /**
 210                          *
 211                          * POST all this stuff to the other site.
 212                          * Temporarily raise the network timeout to 120 seconds because the default 60
 213                          * doesn't always give the other side quite enough time to decrypt everything.
 214                          *
 215                          */
 216
 217                         $a->config['system']['curl_timeout'] = 120;
 218
 219                         $res = post_url($dfrn_confirm,$params);
 220
 221                         logger('dfrn_confirm: Confirm: received data: ' . $res, LOGGER_DATA);
 222
 223                         // Now figure out what they responded. Try to be robust if the remote site is
 224                         // having difficulty and throwing up errors of some kind.
 225
 226                         $leading_junk = substr($res,0,strpos($res,'<?xml'));
 227
 228                         $res = substr($res,strpos($res,'<?xml'));
 229                         if(! strlen($res)) {
 230
 231                                         // No XML at all, this exchange is messed up really bad.
 232                                         // We shouldn't proceed, because the xml parser might choke,
 233                                         // and $status is going to be zero, which indicates success.
 234                                         // We can hardly call this a success.
 235
 236                                 notice( t('Response from remote site was not understood.') . EOL);
 237                                 return;
 238                         }
 239
 240                         if(strlen($leading_junk) && get_config('system','debugging')) {
 241
 242                                         // This might be more common. Mixed error text and some XML.
 243                                         // If we're configured for debugging, show the text. Proceed in either case.
 244
 245                                 notice( t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL );
 246                         }
 247
 248                         $xml = parse_xml_string($res);
 249                         $status = (int) $xml->status;
 250                         $message = unxmlify($xml->message);   // human readable text of what may have gone wrong.
 251                         switch($status) {
 252                                 case 0:
 253                                         notice( t("Confirmation completed successfully.") . EOL);
 254                                         if(strlen($message))
 255                                                 notice( t('Remote site reported: ') . $message . EOL);
 256                                         break;
 257                                 case 1:
 258                                         // birthday paradox - generate new dfrn-id and fall through.
 259                                         $new_dfrn_id = random_string();
 260                                         $r = q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d LIMIT 1",
 261                                                 dbesc($new_dfrn_id),
 262                                                 intval($contact_id),
 263                                                 intval($uid)
 264                                         );
 265
 266                                 case 2:
 267                                         notice( t("Temporary failure. Please wait and try again.") . EOL);
 268                                         if(strlen($message))
 269                                                 notice( t('Remote site reported: ') . $message . EOL);
 270                                         break;
 271
 272
 273                                 case 3:
 274                                         notice( t("Introduction failed or was revoked.") . EOL);
 275                                         if(strlen($message))
 276                                                 notice( t('Remote site reported: ') . $message . EOL);
 277                                         break;
 278                                 }
 279
 280                         if(($status == 0) && ($intro_id)) {
 281
 282                                 // Success. Delete the notification.
 283
 284                                 $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 285                                         intval($intro_id),
 286                                         intval($uid)
 287                                 );
 288
 289                         }
 290
 291                         if($status != 0)
 292                                 return;
 293                 }
 294
 295
 296                 /*
 297                  *
 298                  * We have now established a relationship with the other site.
 299                  * Let's make our own personal copy of their profile photo so we don't have
 300                  * to always load it from their site.
 301                  *
 302                  * We will also update the contact record with the nature and scope of the relationship.
 303                  *
 304                  */
 305
 306                 require_once('include/Photo.php');
 307
 308                 $photos = import_profile_photo($contact['photo'],$uid,$contact_id);
 309
 310                 logger('dfrn_confirm: confirm - imported photos');
 311
 312                 if($network === NETWORK_DFRN) {
 313
 314                         $new_relation = CONTACT_IS_FOLLOWER;
 315                         if(($relation == CONTACT_IS_SHARING) || ($duplex))
 316                                 $new_relation = CONTACT_IS_FRIEND;
 317
 318                         if(($relation == CONTACT_IS_SHARING) && ($duplex))
 319                                 $duplex = 0;
 320
 321                         $r = q("UPDATE `contact` SET
 322                                 `photo` = '%s',
 323                                 `thumb` = '%s',
 324                                 `micro` = '%s',
 325                                 `rel` = %d,
 326                                 `name-date` = '%s',
 327                                 `uri-date` = '%s',
 328                                 `avatar-date` = '%s',
 329                                 `blocked` = 0,
 330                                 `pending` = 0,
 331                                 `duplex` = %d,
 332                                 `hidden` = %d,
 333                                 `network` = 'dfrn' WHERE `id` = %d LIMIT 1
 334                         ",
 335                                 dbesc($photos[0]),
 336                                 dbesc($photos[1]),
 337                                 dbesc($photos[2]),
 338                                 intval($new_relation),
 339                                 dbesc(datetime_convert()),
 340                                 dbesc(datetime_convert()),
 341                                 dbesc(datetime_convert()),
 342                                 intval($duplex),
 343                                 intval($hidden),
 344                                 intval($contact_id)
 345                         );
 346                 }
 347                 else {
 348
 349                         // $network !== NETWORK_DFRN
 350
 351                         $network = (($contact['network']) ? $contact['network'] : NETWORK_OSTATUS);
 352                         $notify = (($contact['notify']) ? $contact['notify'] : '');
 353                         $poll   = (($contact['poll']) ? $contact['poll'] : '');
 354
 355                         if((! $contact['notify']) || (! $contact['poll'])) {
 356                                 $arr = lrdd($contact['url']);
 357                                 if(count($arr)) {
 358                                         foreach($arr as $link) {
 359                                                 if($link['@attributes']['rel'] === 'salmon')
 360                                                         $notify = $link['@attributes']['href'];
 361                                                 if($link['@attributes']['rel'] === NAMESPACE_FEED)
 362                                                         $poll = $link['@attributes']['href'];
 363                                         }
 364                                 }
 365                         }
 366
 367                         $new_relation = $contact['rel'];
 368                         $writable = $contact['writable'];
 369
 370                         if($network === NETWORK_DIASPORA) {
 371                                 if($duplex)
 372                                         $new_relation = CONTACT_IS_FRIEND;
 373                                 if($new_relation != CONTACT_IS_FOLLOWER)
 374                                         $writable = 1;
 375                         }
 376
 377                         $r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 378                                 intval($intro_id),
 379                                 intval($uid)
 380                         );
 381
 382
 383                         $r = q("UPDATE `contact` SET `photo` = '%s',
 384                                 `thumb` = '%s',
 385                                 `micro` = '%s',
 386                                 `name-date` = '%s',
 387                                 `uri-date` = '%s',
 388                                 `avatar-date` = '%s',
 389                                 `notify` = '%s',
 390                                 `poll` = '%s',
 391                                 `blocked` = 0,
 392                                 `pending` = 0,
 393                                 `network` = '%s',
 394                                 `writable` = %d,
 395                                 `hidden` = %d,
 396                                 `rel` = %d
 397                                 WHERE `id` = %d LIMIT 1
 398                         ",
 399                                 dbesc($photos[0]),
 400                                 dbesc($photos[1]),
 401                                 dbesc($photos[2]),
 402                                 dbesc(datetime_convert()),
 403                                 dbesc(datetime_convert()),
 404                                 dbesc(datetime_convert()),
 405                                 dbesc($notify),
 406                                 dbesc($poll),
 407                                 dbesc($network),
 408                                 intval($writable),
 409                                 intval($hidden),
 410                                 intval($new_relation),
 411                                 intval($contact_id)
 412                         );
 413                 }
 414
 415                 if($r === false)
 416                                 notice( t('Unable to set contact photo.') . EOL);
 417
 418                 // reload contact info
 419
 420                 $r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
 421                         intval($contact_id)
 422                 );
 423                 if(count($r))
 424                         $contact = $r[0];
 425                 else
 426                         $contact = null;
 427
 428                 // Send a new friend post if we are allowed to...
 429
 430                 $r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
 431                         intval($uid)
 432                 );
 433                 if((count($r)) && (! $hidden) && ($r[0]['hide-friends'] == 0) && (is_array($contact)) &&  isset($new_relation) && ($new_relation == CONTACT_IS_FRIEND)) {
 434
 435                         if($r[0]['network'] === NETWORK_DIASPORA) {
 436                                 require_once('include/diaspora.php');
 437                                 $ret = diaspora_share($user[0],$r[0]);
 438                                 logger('mod_follow: diaspora_share returns: ' . $ret);
 439                         }
 440
 441                         require_once('include/items.php');
 442
 443                         $self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
 444                                 intval($uid)
 445                         );
 446
 447                         if(count($self)) {
 448
 449                                 $arr = array();
 450                                 $arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $uid);
 451                                 $arr['uid'] = $uid;
 452                                 $arr['contact-id'] = $self[0]['id'];
 453                                 $arr['wall'] = 1;
 454                                 $arr['type'] = 'wall';
 455                                 $arr['gravity'] = 0;
 456                                 $arr['origin'] = 1;
 457                                 $arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
 458                                 $arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
 459                                 $arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
 460                                 $arr['verb'] = ACTIVITY_FRIEND;
 461                                 $arr['object-type'] = ACTIVITY_OBJ_PERSON;
 462
 463                                 $A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
 464                                 $B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
 465                                 $BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
 466                                 $arr['body'] =  sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$BPhoto;
 467
 468                                 $arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
 469                                         . '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
 470                                 $arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
 471                                 $arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
 472                                 $arr['object'] .= '</link></object>' . "\n";
 473                                 $arr['last-child'] = 1;
 474
 475                                 $arr['allow_cid'] = $user[0]['allow_cid'];
 476                                 $arr['allow_gid'] = $user[0]['allow_gid'];
 477                                 $arr['deny_cid']  = $user[0]['deny_cid'];
 478                                 $arr['deny_gid']  = $user[0]['deny_gid'];
 479
 480                                 $i = item_store($arr);
 481                                 if($i)
 482                                 proc_run('php',"include/notifier.php","activity","$i");
 483
 484                         }
 485
 486                 }
 487                 // Let's send our user to the contact editor in case they want to
 488                 // do anything special with this new friend.
 489
 490                 if($handsfree === null)
 491                         goaway($a->get_baseurl() . '/contacts/' . intval($contact_id));
 492                 else
 493                         return;
 494                 //NOTREACHED
 495         }
 496
 497         /**
 498          *
 499          *
 500          * End of Scenario 1. [Local confirmation of remote friend request].
 501          *
 502          * Begin Scenario 2. This is the remote response to the above scenario.
 503          * This will take place on the site that originally initiated the friend request.
 504          * In the section above where the confirming party makes a POST and
 505          * retrieves xml status information, they are communicating with the following code.
 506          *
 507          */
 508
 509         if(x($_POST,'source_url')) {
 510
 511                 // We are processing an external confirmation to an introduction created by our user.
 512
 513                 $public_key = ((x($_POST,'public_key'))   ? $_POST['public_key']           : '');
 514                 $dfrn_id    = ((x($_POST,'dfrn_id'))      ? hex2bin($_POST['dfrn_id'])     : '');
 515                 $source_url = ((x($_POST,'source_url'))   ? hex2bin($_POST['source_url'])  : '');
 516                 $aes_key    = ((x($_POST,'aes_key'))      ? $_POST['aes_key']              : '');
 517                 $duplex     = ((x($_POST,'duplex'))       ? intval($_POST['duplex'])       : 0 );
 518                 $version_id = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
 519
 520                 logger('dfrn_confirm: requestee contacted: ' . $node);
 521
 522                 logger('dfrn_confirm: request: POST=' . print_r($_POST,true), LOGGER_DATA);
 523
 524                 // If $aes_key is set, both of these items require unpacking from the hex transport encoding.
 525
 526                 if(x($aes_key)) {
 527                         $aes_key = hex2bin($aes_key);
 528                         $public_key = hex2bin($public_key);
 529                 }
 530
 531                 // Find our user's account
 532
 533                 $r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
 534                         dbesc($node));
 535
 536                 if(! count($r)) {
 537                         $message = sprintf(t('No user record found for \'%s\' '), $node);
 538                         xml_status(3,$message); // failure
 539                         // NOTREACHED
 540                 }
 541
 542                 $my_prvkey = $r[0]['prvkey'];
 543                 $local_uid = $r[0]['uid'];
 544
 545
 546                 if(! strstr($my_prvkey,'PRIVATE KEY')) {
 547                         $message = t('Our site encryption key is apparently messed up.');
 548                         xml_status(3,$message);
 549                 }
 550
 551                 // verify everything
 552
 553                 $decrypted_source_url = "";
 554                 openssl_private_decrypt($source_url,$decrypted_source_url,$my_prvkey);
 555
 556
 557                 if(! strlen($decrypted_source_url)) {
 558                         $message = t('Empty site URL was provided or URL could not be decrypted by us.');
 559                         xml_status(3,$message);
 560                         // NOTREACHED
 561                 }
 562
 563                 $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 564                         dbesc($decrypted_source_url),
 565                         intval($local_uid)
 566                 );
 567                 if(! count($ret)) {
 568                         if(strstr($decrypted_source_url,'http:'))
 569                                 $newurl = str_replace('http:','https:',$decrypted_source_url);
 570                         else
 571                                 $newurl = str_replace('https:','http:',$decrypted_source_url);
 572
 573                         $ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
 574                                 dbesc($newurl),
 575                                 intval($local_uid)
 576                         );
 577                         if(! count($ret)) {
 578                                 // this is either a bogus confirmation (?) or we deleted the original introduction.
 579                                 $message = t('Contact record was not found for you on our site.');
 580                                 xml_status(3,$message);
 581                                 return; // NOTREACHED
 582                         }
 583                 }
 584
 585                 $relation = $ret[0]['rel'];
 586
 587                 // Decrypt all this stuff we just received
 588
 589                 $foreign_pubkey = $ret[0]['site-pubkey'];
 590                 $dfrn_record    = $ret[0]['id'];
 591
 592                 if(! $foreign_pubkey) {
 593                         $message = sprintf( t('Site public key not available in contact record for URL %s.'), $newurl);
 594                         xml_status(3,$message);
 595                 }
 596
 597                 $decrypted_dfrn_id = "";
 598                 openssl_public_decrypt($dfrn_id,$decrypted_dfrn_id,$foreign_pubkey);
 599
 600                 if(strlen($aes_key)) {
 601                         $decrypted_aes_key = "";
 602                         openssl_private_decrypt($aes_key,$decrypted_aes_key,$my_prvkey);
 603                         $dfrn_pubkey = openssl_decrypt($public_key,'AES-256-CBC',$decrypted_aes_key);
 604                 }
 605                 else {
 606                         $dfrn_pubkey = $public_key;
 607                 }
 608
 609                 $r = q("SELECT * FROM `contact` WHERE `dfrn-id` = '%s' LIMIT 1",
 610                         dbesc($decrypted_dfrn_id)
 611                 );
 612                 if(count($r)) {
 613                         $message = t('The ID provided by your system is a duplicate on our system. It should work if you try again.');
 614                         xml_status(1,$message); // Birthday paradox - duplicate dfrn-id
 615                         // NOTREACHED
 616                 }
 617
 618                 $r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d LIMIT 1",
 619                         dbesc($decrypted_dfrn_id),
 620                         dbesc($dfrn_pubkey),
 621                         intval($dfrn_record)
 622                 );
 623                 if(! count($r)) {
 624                         $message = t('Unable to set your contact credentials on our system.');
 625                         xml_status(3,$message);
 626                 }
 627
 628                 // We're good but now we have to scrape the profile photo and send notifications.
 629
 630
 631
 632                 $r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
 633                         intval($dfrn_record));
 634
 635                 if(count($r))
 636                         $photo = $r[0]['photo'];
 637                 else
 638                         $photo = $a->get_baseurl() . '/images/default-profile.jpg';
 639
 640                 require_once("Photo.php");
 641
 642                 $photos = import_profile_photo($photo,$local_uid,$dfrn_record);
 643
 644                 logger('dfrn_confirm: request - photos imported');
 645
 646                 $new_relation = CONTACT_IS_SHARING;
 647                 if(($relation == CONTACT_IS_FOLLOWER) || ($duplex))
 648                         $new_relation = CONTACT_IS_FRIEND;
 649
 650                 if(($relation == CONTACT_IS_FOLLOWER) && ($duplex))
 651                         $duplex = 0;
 652
 653                 $r = q("UPDATE `contact` SET
 654                         `photo` = '%s',
 655                         `thumb` = '%s',
 656                         `micro` = '%s',
 657                         `rel` = %d,
 658                         `name-date` = '%s',
 659                         `uri-date` = '%s',
 660                         `avatar-date` = '%s',
 661                         `blocked` = 0,
 662                         `pending` = 0,
 663                         `duplex` = %d,
 664                         `network` = '%s' WHERE `id` = %d LIMIT 1
 665                 ",
 666                         dbesc($photos[0]),
 667                         dbesc($photos[1]),
 668                         dbesc($photos[2]),
 669                         intval($new_relation),
 670                         dbesc(datetime_convert()),
 671                         dbesc(datetime_convert()),
 672                         dbesc(datetime_convert()),
 673                         intval($duplex),
 674                         dbesc(NETWORK_DFRN),
 675                         intval($dfrn_record)
 676                 );
 677                 if($r === false) {    // indicates schema is messed up or total db failure
 678                         $message = t('Unable to update your contact profile details on our system');
 679                         xml_status(3,$message);
 680                 }
 681
 682                 // Otherwise everything seems to have worked and we are almost done. Yay!
 683                 // Send an email notification
 684
 685                 logger('dfrn_confirm: request: info updated');
 686
 687                 $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 688                         WHERE `contact`.`id` = %d LIMIT 1",
 689                         intval($dfrn_record)
 690                 );
 691                 if((count($r)) && ($r[0]['notify-flags'] & NOTIFY_CONFIRM)) {
 692
 693                         push_lang($r[0]['language']);
 694                         $tpl = (($new_relation == CONTACT_IS_FRIEND)
 695                                 ? get_intltext_template('friend_complete_eml.tpl')
 696                                 : get_intltext_template('intro_complete_eml.tpl'));
 697
 698                         $email_tpl = replace_macros($tpl, array(
 699                                 '$sitename' => $a->config['sitename'],
 700                                 '$siteurl' =>  $a->get_baseurl(),
 701                                 '$username' => $r[0]['username'],
 702                                 '$email' => $r[0]['email'],
 703                                 '$fn' => $r[0]['name'],
 704                                 '$dfrn_url' => $r[0]['url'],
 705                                 '$uid' => $newuid )
 706                         );
 707
 708                         $res = mail($r[0]['email'], sprintf( t("Connection accepted at %s") , $a->config['sitename']),
 709                                 $email_tpl,
 710                                 'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] . "\n"
 711                                 . 'Content-type: text/plain; charset=UTF-8' . "\n"
 712                                 . 'Content-transfer-encoding: 8bit' );
 713
 714                         if(!$res) {
 715                                 // pointless throwing an error here and confusing the person at the other end of the wire.
 716                         }
 717                         pop_lang();
 718                 }
 719                 xml_status(0); // Success
 720                 return; // NOTREACHED
 721
 722                         ////////////////////// End of this scenario ///////////////////////////////////////////////
 723         }
 724
 725         // somebody arrived here by mistake or they are fishing. Send them to the homepage.
 726
 727         goaway(z_root());
 728         // NOTREACHED
 729
 730 }