mod/dfrn_request.php

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