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