mod/dfrn_request.php

   1 <?php
   2
   3 if(! function_exists('dfrn_request_init')) {
   4 function dfrn_request_init(&$a) {
   5
   6         if($a->argc > 1)
   7                 $which = $a->argv[1];
   8
   9         require_once('mod/profile.php');
  10         profile_init($a,$which);
  11
  12         return;
  13 }}
  14
  15
  16 if(! function_exists('dfrn_request_post')) {
  17 function dfrn_request_post(&$a) {
  18
  19         if(($a->argc != 2) || (! count($a->profile)))
  20                 return;
  21
  22
  23         if($_POST['cancel']) {
  24                 goaway($a->get_baseurl());
  25         }
  26
  27
  28         // We've introduced ourself to another cell, then have been returned to our own cell
  29         // to confirm the request, and then we've clicked submit (perhaps after logging in).
  30         // That brings us here:
  31
  32         if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)) {
  33
  34                 // Ensure this is a valid request
  35
  36                 if(local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) {
  37
  38
  39                         $dfrn_url = notags(trim($_POST['dfrn_url']));
  40                         $aes_allow = (((x($_POST,'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
  41                         $confirm_key = ((x($_POST,'confirm_key')) ? $_POST['confirm_key'] : "");
  42
  43                         $contact_record = null;
  44
  45                         if(x($dfrn_url)) {
  46
  47                                 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' LIMIT 1",
  48                                         intval(get_uid()),
  49                                         dbesc($dfrn_url)
  50                                 );
  51
  52                                 if(count($r)) {
  53                                         if(strlen($r[0]['dfrn-id'])) {
  54                                                 notice( t("This introduction has already been accepted.") . EOL );
  55                                                 return;
  56                                         }
  57                                         else
  58                                                 $contact_record = $r[0];
  59                                 }
  60
  61                                 if(is_array($contact_record)) {
  62                                         $r = q("UPDATE `contact` SET `ret-aes` = %d WHERE `id` = %d LIMIT 1",
  63                                                 intval($aes_allow),
  64                                                 intval($contact_record['id'])
  65                                         );
  66                                 }
  67                                 else {
  68
  69                                         require_once('Scrape.php');
  70
  71
  72                                         $parms = scrape_dfrn($dfrn_url);
  73
  74                                         if(! count($parms)) {
  75                                                 notice( t('Profile location is not valid or does not contain profile information.') . EOL );
  76                                                 return;
  77                                         }
  78                                         else {
  79                                                 if(! x($parms,'fn'))
  80                                                         notice( t('Warning: profile location has no identifiable owner name.') . EOL );
  81                                                 if(! x($parms,'photo'))
  82                                                         notice( t('Warning: profile location has no profile photo.') . EOL );
  83                                                 $invalid = validate_dfrn($parms);
  84                                                 if($invalid) {
  85                                                         notice( $invalid . t(' required parameter')
  86                                                                 . (($invalid == 1) ? t(" was ") : t("s were ") )
  87                                                                 . t("not found at the given location.") . EOL ) ;
  88                                                         return;
  89                                                 }
  90                                         }
  91
  92
  93
  94                                         $dfrn_request = $parms['dfrn-request'];
  95
  96                                         dbesc_array($parms);
  97
  98
  99                                         $r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `name`, `photo`, `site-pubkey`,
 100                                                 `request`, `confirm`, `notify`, `poll`, `aes_allow`)
 101                                                 VALUES ( %d, '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', %d)",
 102                                                 intval(get_uid()),
 103                                                 datetime_convert(),
 104                                                 dbesc($dfrn_url),
 105                                                 $parms['fn'],
 106                                                 $parms['photo'],
 107                                                 $parms['key'],
 108                                                 $parms['dfrn-request'],
 109                                                 $parms['dfrn-confirm'],
 110                                                 $parms['dfrn-notify'],
 111                                                 $parms['dfrn-poll'],
 112                                                 intval($aes_allow)
 113                                         );
 114                                 }
 115
 116                                 if($r) {
 117                                         notice( t("Introduction complete.") . EOL);
 118                                 }
 119
 120                                 // Allow the blocked remote notification to complete
 121
 122                                 if(is_array($contact_record))
 123                                         $dfrn_request = $contact_record['request'];
 124
 125                                 if(strlen($dfrn_request) && strlen($confirm_key))
 126                                         $s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
 127                                         // ignore reply
 128                                 goaway($dfrn_url);
 129                                 return; // NOTREACHED
 130
 131                         }
 132
 133                 }
 134
 135                 // invalid/bogus request
 136
 137                 notice( t('Unrecoverable protocol error.') . EOL );
 138                 goaway($a->get_baseurl());
 139                 return; // NOTREACHED
 140         }
 141
 142         // Otherwise:
 143
 144         // We are the requestee. A person from a remote cell has made an introduction
 145         // on our profile web page and clicked submit. We will use their DFRN-URL to
 146         // figure out how to contact their cell.
 147
 148         // Scrape the originating DFRN-URL for everything we need. Create a contact record
 149         // and an introduction to show our user next time he/she logs in.
 150         // Finally redirect back to the requestor so that their site can record the request.
 151         // If our user (the requestee) later confirms this request, a record of it will need
 152         // to exist on the requestor's cell in order for the confirmation process to complete..
 153
 154         // It's possible that neither the requestor or the requestee are logged in at the moment,
 155         // and the requestor does not yet have any credentials to the requestee profile.
 156
 157         // Who is the requestee? We've already loaded their profile which means their nickname should be
 158         // in $a->argv[1] and we should have their complete info in $a->profile.
 159
 160         if(! (is_array($a->profile) && count($a->profile))) {
 161                 notice( t('Profile unavailable.') . EOL);
 162                 return;
 163         }
 164
 165         $nickname = $a->profile['nickname'];
 166         $notify_flags = $a->profile['notify-flags'];
 167         $uid = $a->profile['uid'];
 168
 169         $contact_record = null;
 170         $failed = false;
 171         $parms = null;
 172
 173
 174         if( x($_POST,'dfrn_url')) {
 175
 176                 $url = trim($_POST['dfrn_url']);
 177                 if(! strlen($url)) {
 178                         notice( t("Invalid locator") . EOL );
 179                         return;
 180                 }
 181
 182                 // Canonicalise email-style profile locator
 183
 184                 $url = webfinger($url);
 185
 186                 if(! strlen($url)) {
 187                         notice( t("Unable to resolve your name at the provided location.") . EOL);
 188                         return;
 189                 }
 190
 191                 $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' LIMIT 1",
 192                         intval($uid),
 193                         dbesc($url)
 194                 );
 195
 196                 if(count($ret)) {
 197                         if(strlen($ret[0]['issued-id'])) {
 198                                 notice( t('You have already introduced yourself here.') . EOL );
 199                                 return;
 200                         }
 201                         else {
 202                                 $contact_record = $ret[0];
 203                                 $parms = array('dfrn-request' => $ret[0]['request']);
 204                         }
 205                 }
 206                 $issued_id = random_string();
 207
 208                 if(is_array($contact_record)) {
 209                         // There is a contact record but no issued-id, so this
 210                         // is a reciprocal introduction from a known contact
 211                         $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d LIMIT 1",
 212                                 dbesc($issued_id),
 213                                 intval($contact_record['id'])
 214                         );
 215                 }
 216                 else {
 217                         if(! validate_url($url)) {
 218                                 notice( t('Invalid profile URL.') . EOL);
 219                                 goaway($a->get_baseurl() . '/' . $a->cmd);
 220                                 return; // NOTREACHED
 221                         }
 222
 223                         if(! allowed_url($url)) {
 224                                 notice( t('Disallowed profile URL.') . EOL);
 225                                 goaway($a->get_baseurl() . '/' . $a->cmd);
 226                                 return; // NOTREACHED
 227                         }
 228
 229
 230                         require_once('Scrape.php');
 231
 232                         $parms = scrape_dfrn($url);
 233
 234                         if(! count($parms)) {
 235                                 notice( t('Profile location is not valid or does not contain profile information.') . EOL );
 236                                 goaway($a->get_baseurl() . '/' . $a->cmd);
 237                         }
 238                         else {
 239                                 if(! x($parms,'fn'))
 240                                         notice( t('Warning: profile location has no identifiable owner name.') . EOL );
 241                                 if(! x($parms,'photo'))
 242                                         notice( t('Warning: profile location has no profile photo.') . EOL );
 243                                 $invalid = validate_dfrn($parms);
 244                                 if($invalid) {
 245                                         notice( $invalid . t(' required parameter')
 246                                                 . (($invalid == 1) ? t(" was ") : t("s were ") )
 247                                                 . t("not found at the given location.") . EOL ) ;
 248
 249                                         return;
 250                                 }
 251                         }
 252
 253
 254                         $parms['url'] = $url;
 255                         $parms['issued-id'] = $issued_id;
 256
 257
 258                         dbesc_array($parms);
 259                         $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `name`, `issued-id`, `photo`, `site-pubkey`,
 260                                 `request`, `confirm`, `notify`, `poll` )
 261                                 VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )",
 262                                 intval($uid),
 263                                 datetime_convert(),
 264                                 $parms['url'],
 265                                 $parms['fn'],
 266                                 $parms['issued-id'],
 267                                 $parms['photo'],
 268                                 $parms['key'],
 269                                 $parms['dfrn-request'],
 270                                 $parms['dfrn-confirm'],
 271                                 $parms['dfrn-notify'],
 272                                 $parms['dfrn-poll']
 273                         );
 274
 275                         // find the contact record we just created
 276                         if($r) {
 277                                 $r = q("SELECT `id` FROM `contact`
 278                                         WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
 279                                         intval($uid),
 280                                         $parms['url'],
 281                                         $parms['issued-id']
 282                                 );
 283                                 if(count($r))
 284                                         $contact_record = $r[0];
 285                         }
 286
 287                 }
 288                 if($r === false) {
 289                         notice( t('Failed to update contact record.') . EOL );
 290                         return;
 291                 }
 292
 293                 $hash = random_string() . (string) time();   // Generate a confirm_key
 294
 295                 if(is_array($contact_record)) {
 296                         $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 297                                 VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 298                                 intval($uid),
 299                                 intval($contact_record['id']),
 300                                 ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 301                                 dbesc(notags(trim($_POST['dfrn-request-message']))),
 302                                 dbesc($hash),
 303                                 dbesc(datetime_convert())
 304                         );
 305                 }
 306
 307
 308                 // This notice will only be seen by the requestor if  the requestor and requestee are on the same server.
 309
 310                 if(! $failed)
 311                         notice( t('Your introduction has been sent.') . EOL );
 312
 313                 // "Homecoming" - send the requestor back to their site to record the introduction.
 314
 315                 $dfrn_url = bin2hex($a->get_baseurl() . '/profile/' . $nickname);
 316                 $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 317
 318                 goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url" . '&confirm_key=' . $hash . (($aes_allow) ? "&aes_allow=1" : ""));
 319                 return; // NOTREACHED
 320
 321         }
 322         return;
 323 }}
 324
 325
 326
 327
 328 if(! function_exists('dfrn_request_content')) {
 329 function dfrn_request_content(&$a) {
 330
 331
 332
 333         if(($a->argc != 2) || (! count($a->profile)))
 334                 return "";
 335
 336         $a->page['template'] = 'profile';
 337
 338         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 339         // to send us to the post section to record the introduction.
 340
 341         if(x($_GET,'dfrn_url')) {
 342
 343                 if(! local_user()) {
 344                         notice( t("Please login to confirm introduction.") . EOL );
 345                         return login();
 346                 }
 347
 348                 // Edge case, but can easily happen in the wild. This person is authenticated,
 349                 // but not as the person who needs to deal with this request.
 350
 351                 if ($a->user['nickname'] != $a->argv[1]) {
 352                         notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
 353                         return login();
 354                 }
 355
 356                 $dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
 357                 $aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
 358                 $confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
 359                 $o .= load_view_file("view/dfrn_req_confirm.tpl");
 360                 $o  = replace_macros($o,array(
 361                         '$dfrn_url' => $dfrn_url,
 362                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 363                         '$confirm_key' => $confirm_key,
 364                         '$username' => $a->user['username'],
 365                         '$uid' => $_SESSION['uid'],
 366                         '$nickname' => $a->user['nickname'],
 367                         'dfrn_rawurl' => $_GET['dfrn_url']
 368                         ));
 369                 return $o;
 370
 371         }
 372         elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) {
 373
 374                 // we are the requestee and it is now safe to send our user their introduction,
 375                 // We could just unblock it, but first we have to jump through a few hoops to
 376                 // send an email, or even to find out if we need to send an email.
 377
 378                 $intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 379                         dbesc($_GET['confirm_key'])
 380                 );
 381
 382                 if(count($intro)) {
 383
 384                         $r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 385                                 WHERE `contact`.`id` = %d LIMIT 1",
 386                                 intval($intro[0]['contact-id'])
 387                         );
 388                         if(count($r)) {
 389
 390                                 if($r[0]['notify-flags'] & NOTIFY_INTRO) {
 391                                         $email_tpl = load_view_file('view/request_notify_eml.tpl');
 392                                         $email = replace_macros($email_tpl, array(
 393                                                 '$requestor' => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 394                                                 '$url' => stripslashes($r[0]['url']),
 395                                                 '$myname' => $r[0]['username'],
 396                                                 '$siteurl' => $a->get_baseurl(),
 397                                                 '$sitename' => $a->config['sitename']
 398                                         ));
 399                                         $res = mail($r[0]['email'],
 400                                                 t("Introduction received at ") . $a->config['sitename'],
 401                                                 $email,
 402                                                 'From: ' . t('Administrator') . '@' . $_SERVER[SERVER_NAME] );
 403                                         // This is a redundant notification - no point throwing errors if it fails.
 404                                 }
 405                         }
 406
 407                         $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s' LIMIT 1",
 408                                 dbesc($_GET['confirm_key'])
 409                         );
 410
 411                 }
 412                 killme();
 413                 return; // NOTREACHED
 414         }
 415         else {
 416
 417                 // Normal web request. Display our user's introduction form.
 418
 419                 $o = load_view_file("view/dfrn_request.tpl");
 420                 $o = replace_macros($o,array('$nickname' => $a->argv[1]));
 421                 return $o;
 422         }
 423
 424         return; // Somebody is fishing.
 425 }}