ParagonIE_Sodium_Core_Curve25519::ge_add

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Summery Summery

Add two group elements.

Syntax Syntax

ParagonIE_Sodium_Core_Curve25519::ge_add( ParagonIE_Sodium_Core_Curve25519_Ge_P3 $p, ParagonIE_Sodium_Core_Curve25519_Ge_Cached $q )

Description Description

r = p + q

Parameters Parameters

$p

(ParagonIE_Sodium_Core_Curve25519_Ge_P3) (Required)

$q

(ParagonIE_Sodium_Core_Curve25519_Ge_Cached) (Required)

Return Return

(ParagonIE_Sodium_Core_Curve25519_Ge_P1p1)

Source Source

File: wp-includes/sodium_compat/src/Core/Curve25519.php

    public static function ge_add(
        ParagonIE_Sodium_Core_Curve25519_Ge_P3 $p,
        ParagonIE_Sodium_Core_Curve25519_Ge_Cached $q
    ) {
        $r = new ParagonIE_Sodium_Core_Curve25519_Ge_P1p1();
        $r->X = self::fe_add($p->Y, $p->X);
        $r->Y = self::fe_sub($p->Y, $p->X);
        $r->Z = self::fe_mul($r->X, $q->YplusX);
        $r->Y = self::fe_mul($r->Y, $q->YminusX);
        $r->T = self::fe_mul($q->T2d, $p->T);
        $r->X = self::fe_mul($p->Z, $q->Z);
        $t0   = self::fe_add($r->X, $r->X);
        $r->X = self::fe_sub($r->Z, $r->Y);
        $r->Y = self::fe_add($r->Z, $r->Y);
        $r->Z = self::fe_add($t0, $r->T);
        $r->T = self::fe_sub($t0, $r->T);
        return $r;
    }

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