src/Module/PublicRSAKey.php

   1 <?php
   2
   3 namespace Friendica\Module;
   4
   5 use ASN_BASE;
   6 use Friendica\BaseModule;
   7 use Friendica\Model\User;
   8 use Friendica\Network\HTTPException\BadRequestException;
   9
  10 /**
  11  * prints the public RSA key of a user
  12  */
  13 class PublicRSAKey extends BaseModule
  14 {
  15         public static function rawContent(array $parameters = [])
  16         {
  17                 $app = self::getApp();
  18
  19                 // @TODO: Replace with parameter from router
  20                 if ($app->argc !== 2) {
  21                         throw new BadRequestException();
  22                 }
  23
  24                 // @TODO: Replace with parameter from router
  25                 $nick = $app->argv[1];
  26
  27                 $user = User::getByNickname($nick, ['spubkey']);
  28                 if (empty($user) || empty($user['spubkey'])) {
  29                         throw new BadRequestException();
  30                 }
  31
  32                 $lines = explode("\n", $user['spubkey']);
  33                 unset($lines[0]);
  34                 unset($lines[count($lines)]);
  35
  36                 $asnString = base64_decode(implode('', $lines));
  37                 $asnBase = ASN_BASE::parseASNString($asnString);
  38
  39                 $m = $asnBase[0]->asnData[1]->asnData[0]->asnData[0]->asnData;
  40                 $e = $asnBase[0]->asnData[1]->asnData[0]->asnData[1]->asnData;
  41
  42                 header('Content-type: application/magic-public-key');
  43                 echo 'RSA' . '.' . $m . '.' . $e;
  44
  45                 exit();
  46         }
  47 }