ParagonIE_Sodium_Core32_Curve25519::ge_scalarmult_base() public WP 1.0
{} Это метод класса: ParagonIE_Sodium_Core32_Curve25519{}
Хуков нет.
Возвращает
ParagonIE_Sodium_Core32_Curve25519_Ge_P3
. Null. Ничего.
Использование
$result = ParagonIE_Sodium_Core32_Curve25519::ge_scalarmult_base( $a );
- $a(строка) (обязательный)
- -
Код ParagonIE_Sodium_Core32_Curve25519::ge_scalarmult_base() ParagonIE Sodium Core32 Curve25519::ge scalarmult base WP 5.7
public static function ge_scalarmult_base($a)
{
/** @var array<int, int> $e */
$e = array();
$r = new ParagonIE_Sodium_Core32_Curve25519_Ge_P1p1();
for ($i = 0; $i < 32; ++$i) {
/** @var int $dbl */
$dbl = (int) $i << 1;
$e[$dbl] = (int) self::chrToInt($a[$i]) & 15;
$e[$dbl + 1] = (int) (self::chrToInt($a[$i]) >> 4) & 15;
}
/** @var int $carry */
$carry = 0;
for ($i = 0; $i < 63; ++$i) {
$e[$i] += $carry;
/** @var int $carry */
$carry = $e[$i] + 8;
/** @var int $carry */
$carry >>= 4;
$e[$i] -= $carry << 4;
}
/** @var array<int, int> $e */
$e[63] += (int) $carry;
$h = self::ge_p3_0();
for ($i = 1; $i < 64; $i += 2) {
$t = self::ge_select((int) floor($i / 2), (int) $e[$i]);
$r = self::ge_madd($r, $h, $t);
$h = self::ge_p1p1_to_p3($r);
}
$r = self::ge_p3_dbl($h);
$s = self::ge_p1p1_to_p2($r);
$r = self::ge_p2_dbl($s);
$s = self::ge_p1p1_to_p2($r);
$r = self::ge_p2_dbl($s);
$s = self::ge_p1p1_to_p2($r);
$r = self::ge_p2_dbl($s);
$h = self::ge_p1p1_to_p3($r);
for ($i = 0; $i < 64; $i += 2) {
$t = self::ge_select($i >> 1, (int) $e[$i]);
$r = self::ge_madd($r, $h, $t);
$h = self::ge_p1p1_to_p3($r);
}
return $h;
}