1<?php
2
3/**
4 * secp256k1
5 *
6 * This is the curve used in Bitcoin
7 *
8 * PHP version 5 and 7
9 *
10 * @category  Crypt
11 * @package   EC
12 * @author    Jim Wigginton <terrafrost@php.net>
13 * @copyright 2017 Jim Wigginton
14 * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
15 * @link      http://pear.php.net/package/Math_BigInteger
16 */
17
18namespace phpseclib3\Crypt\EC\Curves;
19
20//use phpseclib3\Crypt\EC\BaseCurves\Prime;
21use phpseclib3\Crypt\EC\BaseCurves\KoblitzPrime;
22use phpseclib3\Math\BigInteger;
23
24//class secp256k1 extends Prime
25class secp256k1 extends KoblitzPrime
26{
27    public function __construct()
28    {
29        $this->setModulo(new BigInteger('FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F', 16));
30        $this->setCoefficients(
31            new BigInteger('0000000000000000000000000000000000000000000000000000000000000000', 16),
32            new BigInteger('0000000000000000000000000000000000000000000000000000000000000007', 16)
33        );
34        $this->setOrder(new BigInteger('FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141', 16));
35        $this->setBasePoint(
36            new BigInteger('79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798', 16),
37            new BigInteger('483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8', 16)
38        );
39
40        $this->basis = [];
41        $this->basis[] = [
42            'a' => new BigInteger('3086D221A7D46BCDE86C90E49284EB15', -16),
43            'b' => new BigInteger('FF1BBC8129FEF177D790AB8056F5401B3D', -16)
44        ];
45        $this->basis[] = [
46            'a' => new BigInteger('114CA50F7A8E2F3F657C1108D9D44CFD8', -16),
47            'b' => new BigInteger('3086D221A7D46BCDE86C90E49284EB15', -16)
48        ];
49        $this->beta = $this->factory->newInteger(new BigInteger('7AE96A2B657C07106E64479EAC3434E99CF0497512F58995C1396C28719501EE', -16));
50    }
51}
52