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() && ($_SESSION['uid'] == $a->argv[1]) && (x($_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
 140
 141         // we are operating as a remote site and an introduction was requested of us.
 142         // Scrape the originating DFRN-URL for everything we need. Create a contact record
 143         // and an introduction to show our user next time he/she logs in.
 144         // Finally redirect back to the originator so that their site can record the request.
 145         // If our user confirms the request, a record of it will need to exist on the
 146         // originator's site in order for the confirmation process to complete..
 147
 148
 149         $tailname = $a->profile['nickname'];
 150
 151         $uid = $a->profile['uid'];
 152
 153         $contact_record = null;
 154         $failed = false;
 155         $parms = null;
 156
 157
 158         if( x($_POST,'dfrn_url')) {
 159
 160                 $url = trim($_POST['dfrn_url']);
 161                 if(! strlen($url)) {
 162                         notice( "Invalid URL" . EOL );
 163                         return;
 164                 }
 165
 166                 if(strstr($url,'@')) {
 167                         $username = substr($url,0,strpos($url,'@'));
 168                         $hostname = substr($url,strpos($url,'@') + 1);
 169                         require_once('Scrape.php');
 170
 171
 172                         $parms = scrape_meta('https://' . $url);
 173                         if((x($parms,'dfrn-template')) && strstr($parms['dfrn-template'],'%s')) {
 174                                 $url = sprintf($parms['dfrn-template'],$username);
 175                         }
 176                         else {
 177                                 $parms = scrape_meta('http://' . $url);
 178                                 if((x($parms,'dfrn-template')) && strstr($parms['dfrn-template'],'%s')) {
 179                                         $url = sprintf($parms['dfrn-template'],$username);
 180                                 }
 181                                 else {
 182                                         $url = '';
 183                                 }
 184                         }
 185
 186                 }
 187
 188                 if(! strlen($url)) {
 189                         notice("Unable to resolve your name at the provided location." . EOL);
 190                         return;
 191                 }
 192
 193                 $ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' LIMIT 1",
 194                         intval($uid),
 195                         dbesc($url)
 196                 );
 197
 198                 if(count($ret)) {
 199                         if(strlen($ret[0]['issued-id'])) {
 200                                 notice( 'You have already introduced yourself here.' . EOL );
 201                                 return;
 202                         }
 203                         else {
 204                                 $contact_record = $ret[0];
 205                                 $parms = array('dfrn-request' => $ret[0]['request']);
 206                         }
 207                 }
 208                 $issued_id = random_string();
 209
 210                 if(is_array($contact_record)) {
 211                         // There is a contact record but no issued-id, so this
 212                         // is a reciprocal introduction from a known contact
 213                         $r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d LIMIT 1",
 214                                 dbesc($issued_id),
 215                                 intval($contact_record['id'])
 216                         );
 217                 }
 218                 else {
 219
 220                         require_once('Scrape.php');
 221
 222                         $parms = scrape_dfrn($url);
 223
 224                         if(! count($parms)) {
 225                                 notice( 'Profile location is not valid or does not contain profile information.' . EOL );
 226                                 killme();
 227                         }
 228                         else {
 229                                 if(! x($parms,'fn'))
 230                                         notice( 'Warning: profile location has no identifiable owner name.' . EOL );
 231                                 if(! x($parms,'photo'))
 232                                         notice( 'Warning: profile location has no profile photo.' . EOL );
 233                                 $invalid = validate_dfrn($parms);
 234                                 if($invalid) {
 235                                         notice( $invalid . ' required parameter'
 236                                                 . (($invalid == 1) ? " was " : "s were " )
 237                                                 . "not found at the given location." . EOL ) ;
 238
 239                                         return;
 240                                 }
 241                         }
 242
 243
 244                         $parms['url'] = $url;
 245                         $parms['issued-id'] = $issued_id;
 246
 247
 248                         dbesc_array($parms);
 249                         $r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `name`, `issued-id`, `photo`, `site-pubkey`,
 250                                 `request`, `confirm`, `notify`, `poll` )
 251                                 VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )",
 252                                 intval($uid),
 253                                 datetime_convert(),
 254                                 $parms['url'],
 255                                 $parms['fn'],
 256                                 $parms['issued-id'],
 257                                 $parms['photo'],
 258                                 $parms['key'],
 259                                 $parms['dfrn-request'],
 260                                 $parms['dfrn-confirm'],
 261                                 $parms['dfrn-notify'],
 262                                 $parms['dfrn-poll']
 263                         );
 264
 265                         // find the contact record we just created
 266                         if($r) {
 267                                 $r = q("SELECT `id` FROM `contact`
 268                                         WHERE `uid` = '%s' AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
 269                                         intval($uid),
 270                                         $parms['url'],
 271                                         $parms['issued-id']
 272                                 );
 273                                 if(count($r))
 274                                         $contact_record = $r[0];
 275                         }
 276
 277                 }
 278                 if($r === false) {
 279                         notice( 'Failed to update contact record.' . EOL );
 280                         return;
 281                 }
 282
 283                 $hash = random_string() . (string) time();   // Generate a confirm_key
 284
 285                 if(is_array($contact_record)) {
 286                         $ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
 287                                 VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
 288                                 intval($uid),
 289                                 intval($contact_record['id']),
 290                                 ((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
 291                                 dbesc(trim($_POST['dfrn-request-message'])),
 292                                 dbesc($hash),
 293                                 dbesc(datetime_convert())
 294                         );
 295                 }
 296
 297                 // TODO: send an email notification if our user wants one
 298
 299                 if(! $failed)
 300                         notice( "Your introduction has been sent." . EOL );
 301
 302                 // "Homecoming" - send the requestor back to their site to record the introduction.
 303
 304                 $dfrn_url = bin2hex($a->get_baseurl() . "/profile/$tailname");
 305                 $aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
 306
 307                 goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url" . '&confirm_key=' . $hash . (($aes_allow) ? "&aes_allow=1" : ""));
 308                 // NOTREACHED
 309
 310         }
 311         return;
 312 }}
 313
 314 if(! function_exists('dfrn_request_content')) {
 315 function dfrn_request_content(&$a) {
 316
 317
 318
 319         if(($a->argc != 2) || (! count($a->profile)))
 320                 return "";
 321
 322         $a->page['template'] = 'profile';
 323
 324         // "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 325         // to send us to the post section to record the introduction.
 326
 327         if(x($_GET,'dfrn_url')) {
 328
 329                 if(! local_user()) {
 330                         notice( "Please login to confirm introduction." . EOL );
 331                         return login();
 332                 }
 333
 334                 // Edge case, but can easily happen in the wild. This person is authenticated,
 335                 // but not as the person who needs to deal with this request.
 336
 337                 if (($_SESSION['uid'] != $a->argv[1]) && ($a->user['nickname'] != $a->argv[1])) {
 338                         notice( "Incorrect identity currently logged in. Please login to <strong>this</strong> profile." . EOL);
 339                         return login();
 340                 }
 341
 342                 $dfrn_url = notags(trim(pack("H*" , $_GET['dfrn_url'])));
 343                 $aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
 344                 $confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
 345                 $o .= file_get_contents("view/dfrn_req_confirm.tpl");
 346                 $o  = replace_macros($o,array(
 347                         '$dfrn_url' => $dfrn_url,
 348                         '$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 349                         '$confirm_key' => $confirm_key,
 350                         '$username' => $a->user['username'],
 351                         '$uid' => $_SESSION['uid'],
 352                         'dfrn_rawurl' => $_GET['dfrn_url']
 353                         ));
 354                 return $o;
 355
 356         }
 357         else {
 358                 // we are the requestee and it is now safe to send our user their introduction
 359                 if((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) {
 360                         $r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s' LIMIT 1",
 361                                 dbesc($_GET['confirm_key'])
 362                         );
 363                         killme();
 364                 }
 365
 366
 367         // Outside request. Display our user's introduction form.
 368
 369
 370         $o = file_get_contents("view/dfrn_request.tpl");
 371         $o = replace_macros($o,array('$uid' => $a->argv[2]));
 372         return $o;
 373         }
 374 }}