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