ParagonIE_Sodium_Core32_ChaCha20::quarterRound() protected WP 1.0

The ChaCha20 quarter round function. Works on four 32-bit integers.

{} Это метод класса: ParagonIE_Sodium_Core32_ChaCha20{}

Хуков нет.

Возвращает

Массив<Число,. ParagonIE_Sodium_Core32_Int32>

Использование

$result = ParagonIE_Sodium_Core32_ChaCha20::quarterRound(;

Код ParagonIE_Sodium_Core32_ChaCha20::quarterRound() ParagonIE Sodium Core32 ChaCha20::quarterRound ^{WP 5.6.2}

<?php
protected static function quarterRound(
    ParagonIE_Sodium_Core32_Int32 $a,
    ParagonIE_Sodium_Core32_Int32 $b,
    ParagonIE_Sodium_Core32_Int32 $c,
    ParagonIE_Sodium_Core32_Int32 $d
) {
    /** @var ParagonIE_Sodium_Core32_Int32 $a */
    /** @var ParagonIE_Sodium_Core32_Int32 $b */
    /** @var ParagonIE_Sodium_Core32_Int32 $c */
    /** @var ParagonIE_Sodium_Core32_Int32 $d */

    # a = PLUS(a,b); d = ROTATE(XOR(d,a),16);
    $a = $a->addInt32($b);
    $d = $d->xorInt32($a)->rotateLeft(16);

    # c = PLUS(c,d); b = ROTATE(XOR(b,c),12);
    $c = $c->addInt32($d);
    $b = $b->xorInt32($c)->rotateLeft(12);

    # a = PLUS(a,b); d = ROTATE(XOR(d,a), 8);
    $a = $a->addInt32($b);
    $d = $d->xorInt32($a)->rotateLeft(8);

    # c = PLUS(c,d); b = ROTATE(XOR(b,c), 7);
    $c = $c->addInt32($d);
    $b = $b->xorInt32($c)->rotateLeft(7);

    return array($a, $b, $c, $d);
}