src/Module/PublicRSAKey.php

   1 <?php
   2
   3 namespace Friendica\Module;
   4
   5 use ASN_BASE;
   6 use Friendica\BaseModule;
   7 use Friendica\DI;
   8 use Friendica\Model\User;
   9 use Friendica\Network\HTTPException\BadRequestException;
  10
  11 /**
  12  * prints the public RSA key of a user
  13  */
  14 class PublicRSAKey extends BaseModule
  15 {
  16         public static function rawContent(array $parameters = [])
  17         {
  18                 $app = DI::app();
  19
  20                 // @TODO: Replace with parameter from router
  21                 if ($app->argc !== 2) {
  22                         throw new BadRequestException();
  23                 }
  24
  25                 // @TODO: Replace with parameter from router
  26                 $nick = $app->argv[1];
  27
  28                 $user = User::getByNickname($nick, ['spubkey']);
  29                 if (empty($user) || empty($user['spubkey'])) {
  30                         throw new BadRequestException();
  31                 }
  32
  33                 $lines = explode("\n", $user['spubkey']);
  34                 unset($lines[0]);
  35                 unset($lines[count($lines)]);
  36
  37                 $asnString = base64_decode(implode('', $lines));
  38                 $asnBase = ASN_BASE::parseASNString($asnString);
  39
  40                 $m = $asnBase[0]->asnData[1]->asnData[0]->asnData[0]->asnData;
  41                 $e = $asnBase[0]->asnData[1]->asnData[0]->asnData[1]->asnData;
  42
  43                 header('Content-type: application/magic-public-key');
  44                 echo 'RSA' . '.' . $m . '.' . $e;
  45
  46                 exit();
  47         }
  48 }