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Editing File: /home/ubuntu/code_review/phabricator/src/applications/files/keyring/PhabricatorKeyring.php

<?php

final class PhabricatorKeyring extends Phobject {

private static $hasReadConfiguration;
  private static $keyRing = array();

public static function addKey($spec) {
    self::$keyRing[$spec['name']] = $spec;
  }

public static function getKey($name, $type) {
    self::readConfiguration();

if (empty(self::$keyRing[$name])) {
      throw new Exception(
        pht(
          'No key "%s" exists in keyring.',
          $name));
    }

$spec = self::$keyRing[$name];

$material = base64_decode($spec['material.base64'], true);
    return new PhutilOpaqueEnvelope($material);
  }

public static function getDefaultKeyName($type) {
    self::readConfiguration();

foreach (self::$keyRing as $name => $key) {
      if (!empty($key['default'])) {
        return $name;
      }
    }

return null;
  }

private static function readConfiguration() {
    if (self::$hasReadConfiguration) {
      return true;
    }

self::$hasReadConfiguration = true;

foreach (PhabricatorEnv::getEnvConfig('keyring') as $spec) {
      self::addKey($spec);
    }
  }

}

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