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   1  <?php
   2  
   3  /**
   4   * PKCS Formatted Key Handler
   5   *
   6   * PHP version 5
   7   *
   8   * @author    Jim Wigginton <terrafrost@php.net>
   9   * @copyright 2015 Jim Wigginton
  10   * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
  11   * @link      http://phpseclib.sourceforge.net
  12   */
  13  
  14  namespace phpseclib3\Crypt\Common\Formats\Keys;
  15  
  16  /**
  17   * PKCS1 Formatted Key Handler
  18   *
  19   * @author  Jim Wigginton <terrafrost@php.net>
  20   */
  21  abstract class PKCS
  22  {
  23      /**
  24       * Auto-detect the format
  25       */
  26      const MODE_ANY = 0;
  27      /**
  28       * Require base64-encoded PEM's be supplied
  29       */
  30      const MODE_PEM = 1;
  31      /**
  32       * Require raw DER's be supplied
  33       */
  34      const MODE_DER = 2;
  35      /**#@-*/
  36  
  37      /**
  38       * Is the key a base-64 encoded PEM, DER or should it be auto-detected?
  39       *
  40       * @var int
  41       */
  42      protected static $format = self::MODE_ANY;
  43  
  44      /**
  45       * Require base64-encoded PEM's be supplied
  46       *
  47       */
  48      public static function requirePEM()
  49      {
  50          self::$format = self::MODE_PEM;
  51      }
  52  
  53      /**
  54       * Require raw DER's be supplied
  55       *
  56       */
  57      public static function requireDER()
  58      {
  59          self::$format = self::MODE_DER;
  60      }
  61  
  62      /**
  63       * Accept any format and auto detect the format
  64       *
  65       * This is the default setting
  66       *
  67       */
  68      public static function requireAny()
  69      {
  70          self::$format = self::MODE_ANY;
  71      }
  72  }