FM / BaseCurves

/var/www/cobraambalaj/vendor/phpseclib/phpseclib/phpseclib/Crypt/EC/BaseCurves/

/var/www/cobraambalaj/vendor/phpseclib/phpseclib/phpseclib/Crypt/EC/BaseCurves

Name	Size	Mode	Actions
Base.php	4544	0644	edit dl rm
Binary.php	9921	0644	edit dl rm
KoblitzPrime.php	10072	0644	edit dl rm
Montgomery.php	7540	0644	edit dl rm
Prime.php	21169	0644	edit dl rm
TwistedEdwards.php	5565	0644	edit dl rm

Edit: /var/www/cobraambalaj/vendor/phpseclib/phpseclib/phpseclib/Crypt/EC/BaseCurves/TwistedEdwards.php (5565B)

<?php

/**
 * Curves over a*x^2 + y^2 = 1 + d*x^2*y^2
 *
 * http://www.secg.org/SEC2-Ver-1.0.pdf provides for curves with custom parameters.
 * ie. the coefficients can be arbitrary set through specially formatted keys, etc.
 * As such, Prime.php is built very generically and it's not able to take full
 * advantage of curves with 0 coefficients to produce simplified point doubling,
 * point addition. Twisted Edwards curves, in contrast, do not have a way, currently,
 * to customize them. As such, we can omit the super generic stuff from this class
 * and let the named curves (Ed25519 and Ed448) define their own custom tailored
 * point addition and point doubling methods.
 *
 * More info:
 *
 * https://en.wikipedia.org/wiki/Twisted_Edwards_curve
 *
 * PHP version 5 and 7
 *
 * @category  Crypt
 * @package   EC
 * @author    Jim Wigginton <terrafrost@php.net>
 * @copyright 2017 Jim Wigginton
 * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
 * @link      http://pear.php.net/package/Math_BigInteger
 */

namespace phpseclib3\Crypt\EC\BaseCurves;

use phpseclib3\Math\PrimeField;
use phpseclib3\Math\BigInteger;
use phpseclib3\Math\PrimeField\Integer as PrimeInteger;

/**
 * Curves over a*x^2 + y^2 = 1 + d*x^2*y^2
 *
 * @package Prime
 * @author  Jim Wigginton <terrafrost@php.net>
 * @access  public
 */
class TwistedEdwards extends Base
{
    /**
     * The modulo
     *
     * @var BigInteger
     */
    protected $modulo;

/**
     * Cofficient for x^2
     *
     * @var object
     */
    protected $a;

/**
     * Cofficient for x^2*y^2
     *
     * @var object
     */
    protected $d;

/**
     * Base Point
     *
     * @var object[]
     */
    protected $p;

/**
     * The number zero over the specified finite field
     *
     * @var object
     */
    protected $zero;

/**
     * The number one over the specified finite field
     *
     * @var object
     */
    protected $one;

/**
     * The number two over the specified finite field
     *
     * @var object
     */
    protected $two;

/**
     * Sets the modulo
     */
    public function setModulo(BigInteger $modulo)
    {
        $this->modulo = $modulo;
        $this->factory = new PrimeField($modulo);
        $this->zero = $this->factory->newInteger(new BigInteger(0));
        $this->one = $this->factory->newInteger(new BigInteger(1));
        $this->two = $this->factory->newInteger(new BigInteger(2));
    }

/**
     * Set coefficients a and b
     */
    public function setCoefficients(BigInteger $a, BigInteger $d)
    {
        if (!isset($this->factory)) {
            throw new \RuntimeException('setModulo needs to be called before this method');
        }
        $this->a = $this->factory->newInteger($a);
        $this->d = $this->factory->newInteger($d);
    }

/**
     * Set x and y coordinates for the base point
     */
    public function setBasePoint($x, $y)
    {
        switch (true) {
            case !$x instanceof BigInteger && !$x instanceof PrimeInteger:
                throw new \UnexpectedValueException('Argument 1 passed to Prime::setBasePoint() must be an instance of either BigInteger or PrimeField\Integer');
            case !$y instanceof BigInteger && !$y instanceof PrimeInteger:
                throw new \UnexpectedValueException('Argument 2 passed to Prime::setBasePoint() must be an instance of either BigInteger or PrimeField\Integer');
        }
        if (!isset($this->factory)) {
            throw new \RuntimeException('setModulo needs to be called before this method');
        }
        $this->p = [
            $x instanceof BigInteger ? $this->factory->newInteger($x) : $x,
            $y instanceof BigInteger ? $this->factory->newInteger($y) : $y
        ];
    }

/**
     * Returns the a coefficient
     *
     * @return \phpseclib3\Math\PrimeField\Integer
     */
    public function getA()
    {
        return $this->a;
    }

/**
     * Returns the a coefficient
     *
     * @return \phpseclib3\Math\PrimeField\Integer
     */
    public function getD()
    {
        return $this->d;
    }

/**
     * Retrieve the base point as an array
     *
     * @return array
     */
    public function getBasePoint()
    {
        if (!isset($this->factory)) {
            throw new \RuntimeException('setModulo needs to be called before this method');
        }
        /*
        if (!isset($this->p)) {
            throw new \RuntimeException('setBasePoint needs to be called before this method');
        }
        */
        return $this->p;
    }

/**
     * Returns the affine point
     *
     * @return \phpseclib3\Math\PrimeField\Integer[]
     */
    public function convertToAffine(array $p)
    {
        if (!isset($p[2])) {
            return $p;
        }
        list($x, $y, $z) = $p;
        $z = $this->one->divide($z);
        return [
            $x->multiply($z),
            $y->multiply($z)
        ];
    }

/**
     * Returns the modulo
     *
     * @return \phpseclib3\Math\BigInteger
     */
    public function getModulo()
    {
        return $this->modulo;
    }

/**
     * Tests whether or not the x / y values satisfy the equation
     *
     * @return boolean
     */
    public function verifyPoint(array $p)
    {
        list($x, $y) = $p;
        $x2 = $x->multiply($x);
        $y2 = $y->multiply($y);

$lhs = $this->a->multiply($x2)->add($y2);
        $rhs = $this->d->multiply($x2)->multiply($y2)->add($this->one);

return $lhs->equals($rhs);
    }
}

cmd: