16238255757

Committed 12 Jul 2025 01:00PM UTC coverage: 84.857% (-6.3%) from 91.134%

Build # 16238255757

Build Type

Pull #12

github

Committed by

web-flow

Commit Message

Merge 97611838a into 5ce1049c0

Pull Request Pull Request #12: WIP: Add montgomery

Run Details

270 of 376 new or added lines in 17 files covered. (71.81%)

2 existing lines in 1 file now uncovered.

947 of 1116 relevant lines covered (84.86%)

23.02 hits per line

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81.25

/src/Math/MG_TE_Math.php

<?php

namespace Famoser\Elliptic\Math;

use Famoser\Elliptic\Primitives\BirationalMap;
use Famoser\Elliptic\Primitives\Curve;
use Famoser\Elliptic\Primitives\Point;

/**
 * Assumes a montgomery curve with a birational map to a twisted edwards curve a=-1.
 *
 * Some hardening against side-channels has been done.
 */
class MG_TE_Math extends AbstractMath implements MathInterface
{
    private readonly TE_ANeg1_Math $math;

    public function __construct(Curve $curve, private readonly BirationalMap $birationalMap, Curve $targetCurve)
    {
        parent::__construct($curve);

        $this->math = new TE_ANeg1_Math($targetCurve);
    }

    public function add(Point $a, Point $b): Point
    {
        $mappedA = $this->birationalMap->map($a);
        $mappedB = $this->birationalMap->map($b);

        $mappedResult = $this->math->add($mappedA, $mappedB);

        return $this->birationalMap->reverse($mappedResult);
    }

    public function double(Point $a): Point
    {
        $mappedA = $this->birationalMap->map($a);

        $mappedResult = $this->math->double($mappedA);

        return $this->birationalMap->reverse($mappedResult);
    }

    public function mul(Point $point, \GMP $factor): Point
    {
        $mapped = $this->birationalMap->map($point);

        $mappedResult = $this->math->mul($mapped, $factor);

        return $this->birationalMap->reverse($mappedResult);
    }
}

1	<?php
2
3	namespace Famoser\Elliptic\Math;
4
5	use Famoser\Elliptic\Primitives\BirationalMap;
6	use Famoser\Elliptic\Primitives\Curve;
7	use Famoser\Elliptic\Primitives\Point;
8
9	/**
10	* Assumes a montgomery curve with a birational map to a twisted edwards curve a=-1.
11	*
12	* Some hardening against side-channels has been done.
13	*/
14	class MG_TE_Math extends AbstractMath implements MathInterface
15	{
16	private readonly TE_ANeg1_Math $math;
17
NEW 18	public function __construct(Curve $curve, private readonly BirationalMap $birationalMap, Curve $targetCurve)	×
19	{
NEW 20	parent::__construct($curve);	×
21
NEW 22	$this->math = new TE_ANeg1_Math($targetCurve);	×
23	}
24
25	public function add(Point $a, Point $b): Point	3✔
26	{
27	$mappedA = $this->birationalMap->map($a);	3✔
28	$mappedB = $this->birationalMap->map($b);	3✔
29
30	$mappedResult = $this->math->add($mappedA, $mappedB);	3✔
31
32	return $this->birationalMap->reverse($mappedResult);	3✔
33	}
34
35	public function double(Point $a): Point	3✔
36	{
37	$mappedA = $this->birationalMap->map($a);	3✔
38
39	$mappedResult = $this->math->double($mappedA);	3✔
40
41	return $this->birationalMap->reverse($mappedResult);	3✔
42	}
43
44	public function mul(Point $point, \GMP $factor): Point	4✔
45	{
46	$mapped = $this->birationalMap->map($point);	4✔
47
48	$mappedResult = $this->math->mul($mapped, $factor);	4✔
49
50	return $this->birationalMap->reverse($mappedResult);	4✔
51	}
52	}

famoser / elliptic / 16238255757

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