2 views 
Syntax Syntax
Parameters Parameters
- $s
-
(Required)
Return Return
(string)
Source Source
File: wp-includes/sodium_compat/src/Core/Curve25519.php
public static function sc_reduce($s)
{
/** @var int $s0 */
$s0 = 2097151 & self::load_3(self::substr($s, 0, 3));
/** @var int $s1 */
$s1 = 2097151 & (self::load_4(self::substr($s, 2, 4)) >> 5);
/** @var int $s2 */
$s2 = 2097151 & (self::load_3(self::substr($s, 5, 3)) >> 2);
/** @var int $s3 */
$s3 = 2097151 & (self::load_4(self::substr($s, 7, 4)) >> 7);
/** @var int $s4 */
$s4 = 2097151 & (self::load_4(self::substr($s, 10, 4)) >> 4);
/** @var int $s5 */
$s5 = 2097151 & (self::load_3(self::substr($s, 13, 3)) >> 1);
/** @var int $s6 */
$s6 = 2097151 & (self::load_4(self::substr($s, 15, 4)) >> 6);
/** @var int $s7 */
$s7 = 2097151 & (self::load_3(self::substr($s, 18, 4)) >> 3);
/** @var int $s8 */
$s8 = 2097151 & self::load_3(self::substr($s, 21, 3));
/** @var int $s9 */
$s9 = 2097151 & (self::load_4(self::substr($s, 23, 4)) >> 5);
/** @var int $s10 */
$s10 = 2097151 & (self::load_3(self::substr($s, 26, 3)) >> 2);
/** @var int $s11 */
$s11 = 2097151 & (self::load_4(self::substr($s, 28, 4)) >> 7);
/** @var int $s12 */
$s12 = 2097151 & (self::load_4(self::substr($s, 31, 4)) >> 4);
/** @var int $s13 */
$s13 = 2097151 & (self::load_3(self::substr($s, 34, 3)) >> 1);
/** @var int $s14 */
$s14 = 2097151 & (self::load_4(self::substr($s, 36, 4)) >> 6);
/** @var int $s15 */
$s15 = 2097151 & (self::load_3(self::substr($s, 39, 4)) >> 3);
/** @var int $s16 */
$s16 = 2097151 & self::load_3(self::substr($s, 42, 3));
/** @var int $s17 */
$s17 = 2097151 & (self::load_4(self::substr($s, 44, 4)) >> 5);
/** @var int $s18 */
$s18 = 2097151 & (self::load_3(self::substr($s, 47, 3)) >> 2);
/** @var int $s19 */
$s19 = 2097151 & (self::load_4(self::substr($s, 49, 4)) >> 7);
/** @var int $s20 */
$s20 = 2097151 & (self::load_4(self::substr($s, 52, 4)) >> 4);
/** @var int $s21 */
$s21 = 2097151 & (self::load_3(self::substr($s, 55, 3)) >> 1);
/** @var int $s22 */
$s22 = 2097151 & (self::load_4(self::substr($s, 57, 4)) >> 6);
/** @var int $s23 */
$s23 = (self::load_4(self::substr($s, 60, 4)) >> 3);
$s11 += self::mul($s23, 666643, 20);
$s12 += self::mul($s23, 470296, 19);
$s13 += self::mul($s23, 654183, 20);
$s14 -= self::mul($s23, 997805, 20);
$s15 += self::mul($s23, 136657, 18);
$s16 -= self::mul($s23, 683901, 20);
$s10 += self::mul($s22, 666643, 20);
$s11 += self::mul($s22, 470296, 19);
$s12 += self::mul($s22, 654183, 20);
$s13 -= self::mul($s22, 997805, 20);
$s14 += self::mul($s22, 136657, 18);
$s15 -= self::mul($s22, 683901, 20);
$s9 += self::mul($s21, 666643, 20);
$s10 += self::mul($s21, 470296, 19);
$s11 += self::mul($s21, 654183, 20);
$s12 -= self::mul($s21, 997805, 20);
$s13 += self::mul($s21, 136657, 18);
$s14 -= self::mul($s21, 683901, 20);
$s8 += self::mul($s20, 666643, 20);
$s9 += self::mul($s20, 470296, 19);
$s10 += self::mul($s20, 654183, 20);
$s11 -= self::mul($s20, 997805, 20);
$s12 += self::mul($s20, 136657, 18);
$s13 -= self::mul($s20, 683901, 20);
$s7 += self::mul($s19, 666643, 20);
$s8 += self::mul($s19, 470296, 19);
$s9 += self::mul($s19, 654183, 20);
$s10 -= self::mul($s19, 997805, 20);
$s11 += self::mul($s19, 136657, 18);
$s12 -= self::mul($s19, 683901, 20);
$s6 += self::mul($s18, 666643, 20);
$s7 += self::mul($s18, 470296, 19);
$s8 += self::mul($s18, 654183, 20);
$s9 -= self::mul($s18, 997805, 20);
$s10 += self::mul($s18, 136657, 18);
$s11 -= self::mul($s18, 683901, 20);
/** @var int $carry6 */
$carry6 = ($s6 + (1 << 20)) >> 21;
$s7 += $carry6;
$s6 -= $carry6 << 21;
/** @var int $carry8 */
$carry8 = ($s8 + (1 << 20)) >> 21;
$s9 += $carry8;
$s8 -= $carry8 << 21;
/** @var int $carry10 */
$carry10 = ($s10 + (1 << 20)) >> 21;
$s11 += $carry10;
$s10 -= $carry10 << 21;
/** @var int $carry12 */
$carry12 = ($s12 + (1 << 20)) >> 21;
$s13 += $carry12;
$s12 -= $carry12 << 21;
/** @var int $carry14 */
$carry14 = ($s14 + (1 << 20)) >> 21;
$s15 += $carry14;
$s14 -= $carry14 << 21;
/** @var int $carry16 */
$carry16 = ($s16 + (1 << 20)) >> 21;
$s17 += $carry16;
$s16 -= $carry16 << 21;
/** @var int $carry7 */
$carry7 = ($s7 + (1 << 20)) >> 21;
$s8 += $carry7;
$s7 -= $carry7 << 21;
/** @var int $carry9 */
$carry9 = ($s9 + (1 << 20)) >> 21;
$s10 += $carry9;
$s9 -= $carry9 << 21;
/** @var int $carry11 */
$carry11 = ($s11 + (1 << 20)) >> 21;
$s12 += $carry11;
$s11 -= $carry11 << 21;
/** @var int $carry13 */
$carry13 = ($s13 + (1 << 20)) >> 21;
$s14 += $carry13;
$s13 -= $carry13 << 21;
/** @var int $carry15 */
$carry15 = ($s15 + (1 << 20)) >> 21;
$s16 += $carry15;
$s15 -= $carry15 << 21;
$s5 += self::mul($s17, 666643, 20);
$s6 += self::mul($s17, 470296, 19);
$s7 += self::mul($s17, 654183, 20);
$s8 -= self::mul($s17, 997805, 20);
$s9 += self::mul($s17, 136657, 18);
$s10 -= self::mul($s17, 683901, 20);
$s4 += self::mul($s16, 666643, 20);
$s5 += self::mul($s16, 470296, 19);
$s6 += self::mul($s16, 654183, 20);
$s7 -= self::mul($s16, 997805, 20);
$s8 += self::mul($s16, 136657, 18);
$s9 -= self::mul($s16, 683901, 20);
$s3 += self::mul($s15, 666643, 20);
$s4 += self::mul($s15, 470296, 19);
$s5 += self::mul($s15, 654183, 20);
$s6 -= self::mul($s15, 997805, 20);
$s7 += self::mul($s15, 136657, 18);
$s8 -= self::mul($s15, 683901, 20);
$s2 += self::mul($s14, 666643, 20);
$s3 += self::mul($s14, 470296, 19);
$s4 += self::mul($s14, 654183, 20);
$s5 -= self::mul($s14, 997805, 20);
$s6 += self::mul($s14, 136657, 18);
$s7 -= self::mul($s14, 683901, 20);
$s1 += self::mul($s13, 666643, 20);
$s2 += self::mul($s13, 470296, 19);
$s3 += self::mul($s13, 654183, 20);
$s4 -= self::mul($s13, 997805, 20);
$s5 += self::mul($s13, 136657, 18);
$s6 -= self::mul($s13, 683901, 20);
$s0 += self::mul($s12, 666643, 20);
$s1 += self::mul($s12, 470296, 19);
$s2 += self::mul($s12, 654183, 20);
$s3 -= self::mul($s12, 997805, 20);
$s4 += self::mul($s12, 136657, 18);
$s5 -= self::mul($s12, 683901, 20);
$s12 = 0;
/** @var int $carry0 */
$carry0 = ($s0 + (1 << 20)) >> 21;
$s1 += $carry0;
$s0 -= $carry0 << 21;
/** @var int $carry2 */
$carry2 = ($s2 + (1 << 20)) >> 21;
$s3 += $carry2;
$s2 -= $carry2 << 21;
/** @var int $carry4 */
$carry4 = ($s4 + (1 << 20)) >> 21;
$s5 += $carry4;
$s4 -= $carry4 << 21;
/** @var int $carry6 */
$carry6 = ($s6 + (1 << 20)) >> 21;
$s7 += $carry6;
$s6 -= $carry6 << 21;
/** @var int $carry8 */
$carry8 = ($s8 + (1 << 20)) >> 21;
$s9 += $carry8;
$s8 -= $carry8 << 21;
/** @var int $carry10 */
$carry10 = ($s10 + (1 << 20)) >> 21;
$s11 += $carry10;
$s10 -= $carry10 << 21;
/** @var int $carry1 */
$carry1 = ($s1 + (1 << 20)) >> 21;
$s2 += $carry1;
$s1 -= $carry1 << 21;
/** @var int $carry3 */
$carry3 = ($s3 + (1 << 20)) >> 21;
$s4 += $carry3;
$s3 -= $carry3 << 21;
/** @var int $carry5 */
$carry5 = ($s5 + (1 << 20)) >> 21;
$s6 += $carry5;
$s5 -= $carry5 << 21;
/** @var int $carry7 */
$carry7 = ($s7 + (1 << 20)) >> 21;
$s8 += $carry7;
$s7 -= $carry7 << 21;
/** @var int $carry9 */
$carry9 = ($s9 + (1 << 20)) >> 21;
$s10 += $carry9;
$s9 -= $carry9 << 21;
/** @var int $carry11 */
$carry11 = ($s11 + (1 << 20)) >> 21;
$s12 += $carry11;
$s11 -= $carry11 << 21;
$s0 += self::mul($s12, 666643, 20);
$s1 += self::mul($s12, 470296, 19);
$s2 += self::mul($s12, 654183, 20);
$s3 -= self::mul($s12, 997805, 20);
$s4 += self::mul($s12, 136657, 18);
$s5 -= self::mul($s12, 683901, 20);
$s12 = 0;
/** @var int $carry0 */
$carry0 = $s0 >> 21;
$s1 += $carry0;
$s0 -= $carry0 << 21;
/** @var int $carry1 */
$carry1 = $s1 >> 21;
$s2 += $carry1;
$s1 -= $carry1 << 21;
/** @var int $carry2 */
$carry2 = $s2 >> 21;
$s3 += $carry2;
$s2 -= $carry2 << 21;
/** @var int $carry3 */
$carry3 = $s3 >> 21;
$s4 += $carry3;
$s3 -= $carry3 << 21;
/** @var int $carry4 */
$carry4 = $s4 >> 21;
$s5 += $carry4;
$s4 -= $carry4 << 21;
/** @var int $carry5 */
$carry5 = $s5 >> 21;
$s6 += $carry5;
$s5 -= $carry5 << 21;
/** @var int $carry6 */
$carry6 = $s6 >> 21;
$s7 += $carry6;
$s6 -= $carry6 << 21;
/** @var int $carry7 */
$carry7 = $s7 >> 21;
$s8 += $carry7;
$s7 -= $carry7 << 21;
/** @var int $carry8 */
$carry8 = $s8 >> 21;
$s9 += $carry8;
$s8 -= $carry8 << 21;
/** @var int $carry9 */
$carry9 = $s9 >> 21;
$s10 += $carry9;
$s9 -= $carry9 << 21;
/** @var int $carry10 */
$carry10 = $s10 >> 21;
$s11 += $carry10;
$s10 -= $carry10 << 21;
/** @var int $carry11 */
$carry11 = $s11 >> 21;
$s12 += $carry11;
$s11 -= $carry11 << 21;
$s0 += self::mul($s12, 666643, 20);
$s1 += self::mul($s12, 470296, 19);
$s2 += self::mul($s12, 654183, 20);
$s3 -= self::mul($s12, 997805, 20);
$s4 += self::mul($s12, 136657, 18);
$s5 -= self::mul($s12, 683901, 20);
/** @var int $carry0 */
$carry0 = $s0 >> 21;
$s1 += $carry0;
$s0 -= $carry0 << 21;
/** @var int $carry1 */
$carry1 = $s1 >> 21;
$s2 += $carry1;
$s1 -= $carry1 << 21;
/** @var int $carry2 */
$carry2 = $s2 >> 21;
$s3 += $carry2;
$s2 -= $carry2 << 21;
/** @var int $carry3 */
$carry3 = $s3 >> 21;
$s4 += $carry3;
$s3 -= $carry3 << 21;
/** @var int $carry4 */
$carry4 = $s4 >> 21;
$s5 += $carry4;
$s4 -= $carry4 << 21;
/** @var int $carry5 */
$carry5 = $s5 >> 21;
$s6 += $carry5;
$s5 -= $carry5 << 21;
/** @var int $carry6 */
$carry6 = $s6 >> 21;
$s7 += $carry6;
$s6 -= $carry6 << 21;
/** @var int $carry7 */
$carry7 = $s7 >> 21;
$s8 += $carry7;
$s7 -= $carry7 << 21;
/** @var int $carry8 */
$carry8 = $s8 >> 21;
$s9 += $carry8;
$s8 -= $carry8 << 21;
/** @var int $carry9 */
$carry9 = $s9 >> 21;
$s10 += $carry9;
$s9 -= $carry9 << 21;
/** @var int $carry10 */
$carry10 = $s10 >> 21;
$s11 += $carry10;
$s10 -= $carry10 << 21;
/**
* @var array<int, int>
*/
$arr = array(
(int) ($s0 >> 0),
(int) ($s0 >> 8),
(int) (($s0 >> 16) | $s1 << 5),
(int) ($s1 >> 3),
(int) ($s1 >> 11),
(int) (($s1 >> 19) | $s2 << 2),
(int) ($s2 >> 6),
(int) (($s2 >> 14) | $s3 << 7),
(int) ($s3 >> 1),
(int) ($s3 >> 9),
(int) (($s3 >> 17) | $s4 << 4),
(int) ($s4 >> 4),
(int) ($s4 >> 12),
(int) (($s4 >> 20) | $s5 << 1),
(int) ($s5 >> 7),
(int) (($s5 >> 15) | $s6 << 6),
(int) ($s6 >> 2),
(int) ($s6 >> 10),
(int) (($s6 >> 18) | $s7 << 3),
(int) ($s7 >> 5),
(int) ($s7 >> 13),
(int) ($s8 >> 0),
(int) ($s8 >> 8),
(int) (($s8 >> 16) | $s9 << 5),
(int) ($s9 >> 3),
(int) ($s9 >> 11),
(int) (($s9 >> 19) | $s10 << 2),
(int) ($s10 >> 6),
(int) (($s10 >> 14) | $s11 << 7),
(int) ($s11 >> 1),
(int) ($s11 >> 9),
(int) $s11 >> 17
);
return self::intArrayToString($arr);
}
