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   1  <?php
   2  
   3  /**
   4   * secp160k1
   5   *
   6   * PHP version 5 and 7
   7   *
   8   * @category  Crypt
   9   * @package   EC
  10   * @author    Jim Wigginton <[email protected]>
  11   * @copyright 2017 Jim Wigginton
  12   * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
  13   * @link      http://pear.php.net/package/Math_BigInteger
  14   */
  15  
  16  namespace phpseclib3\Crypt\EC\Curves;
  17  
  18  use phpseclib3\Crypt\EC\BaseCurves\KoblitzPrime;
  19  use phpseclib3\Math\BigInteger;
  20  
  21  class secp160k1 extends KoblitzPrime
  22  {
  23      public function __construct()
  24      {
  25          // same as secp160r2
  26          $this->setModulo(new BigInteger('FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73', 16));
  27          $this->setCoefficients(
  28              new BigInteger('0000000000000000000000000000000000000000', 16),
  29              new BigInteger('0000000000000000000000000000000000000007', 16)
  30          );
  31          $this->setBasePoint(
  32              new BigInteger('3B4C382CE37AA192A4019E763036F4F5DD4D7EBB', 16),
  33              new BigInteger('938CF935318FDCED6BC28286531733C3F03C4FEE', 16)
  34          );
  35          $this->setOrder(new BigInteger('0100000000000000000001B8FA16DFAB9ACA16B6B3', 16));
  36  
  37          $this->basis = [];
  38          $this->basis[] = [
  39              'a' => new BigInteger('0096341F1138933BC2F505', -16),
  40              'b' => new BigInteger('FF6E9D0418C67BB8D5F562', -16)
  41          ];
  42          $this->basis[] = [
  43              'a' => new BigInteger('01BDCB3A09AAAABEAFF4A8', -16),
  44              'b' => new BigInteger('04D12329FF0EF498EA67', -16)
  45          ];
  46          $this->beta = $this->factory->newInteger(new BigInteger('645B7345A143464942CC46D7CF4D5D1E1E6CBB68', -16));
  47      }
  48  }