ParagonIE_Sodium_Core_Curve25519::ge_p2_dbl() public WP 1.0

Это метод класса: ParagonIE_Sodium_Core_Curve25519{}

Хуков нет.

Возвращает

ParagonIE_Sodium_Core_Curve25519_Ge_P1p1.

Использование

$result = ParagonIE_Sodium_Core_Curve25519::ge_p2_dbl( $p );

$p(ParagonIE_Sodium_Core_Curve25519_Ge_P2) (обязательный)

Код ParagonIE_Sodium_Core_Curve25519::ge_p2_dbl() ParagonIE Sodium Core Curve25519::ge p2 dbl ^{WP 5.5.1}

<?php
public static function ge_p2_dbl(ParagonIE_Sodium_Core_Curve25519_Ge_P2 $p)
{
    $r = new ParagonIE_Sodium_Core_Curve25519_Ge_P1p1();

    $r->X = self::fe_sq($p->X);
    $r->Z = self::fe_sq($p->Y);
    $r->T = self::fe_sq2($p->Z);
    $r->Y = self::fe_add($p->X, $p->Y);
    $t0   = self::fe_sq($r->Y);
    $r->Y = self::fe_add($r->Z, $r->X);
    $r->Z = self::fe_sub($r->Z, $r->X);
    $r->X = self::fe_sub($t0, $r->Y);
    $r->T = self::fe_sub($r->T, $r->Z);

    return $r;
}