ParagonIE_Sodium_Core32_Poly1305_State::finish() public WP 1.0
{} Это метод класса: ParagonIE_Sodium_Core32_Poly1305_State{}
Хуков нет.
Возвращает
Строку.
Использование
$ParagonIE_Sodium_Core32_Poly1305_State = new ParagonIE_Sodium_Core32_Poly1305_State(); $ParagonIE_Sodium_Core32_Poly1305_State->finish();
Код ParagonIE_Sodium_Core32_Poly1305_State::finish() ParagonIE Sodium Core32 Poly1305 State::finish WP 5.6.2
<?php
public function finish()
{
/* process the remaining block */
if ($this->leftover) {
$i = $this->leftover;
$this->buffer[$i++] = 1;
for (; $i < ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE; ++$i) {
$this->buffer[$i] = 0;
}
$this->final = true;
$this->blocks(
self::substr(
self::intArrayToString($this->buffer),
0,
ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE
),
$b = ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE
);
}
/**
* @var ParagonIE_Sodium_Core32_Int32 $f
* @var ParagonIE_Sodium_Core32_Int32 $g0
* @var ParagonIE_Sodium_Core32_Int32 $g1
* @var ParagonIE_Sodium_Core32_Int32 $g2
* @var ParagonIE_Sodium_Core32_Int32 $g3
* @var ParagonIE_Sodium_Core32_Int32 $g4
* @var ParagonIE_Sodium_Core32_Int32 $h0
* @var ParagonIE_Sodium_Core32_Int32 $h1
* @var ParagonIE_Sodium_Core32_Int32 $h2
* @var ParagonIE_Sodium_Core32_Int32 $h3
* @var ParagonIE_Sodium_Core32_Int32 $h4
*/
$h0 = $this->h[0];
$h1 = $this->h[1];
$h2 = $this->h[2];
$h3 = $this->h[3];
$h4 = $this->h[4];
$c = $h1->shiftRight(26); # $c = $h1 >> 26;
$h1 = $h1->mask(0x3ffffff); # $h1 &= 0x3ffffff;
$h2 = $h2->addInt32($c); # $h2 += $c;
$c = $h2->shiftRight(26); # $c = $h2 >> 26;
$h2 = $h2->mask(0x3ffffff); # $h2 &= 0x3ffffff;
$h3 = $h3->addInt32($c); # $h3 += $c;
$c = $h3->shiftRight(26); # $c = $h3 >> 26;
$h3 = $h3->mask(0x3ffffff); # $h3 &= 0x3ffffff;
$h4 = $h4->addInt32($c); # $h4 += $c;
$c = $h4->shiftRight(26); # $c = $h4 >> 26;
$h4 = $h4->mask(0x3ffffff); # $h4 &= 0x3ffffff;
$h0 = $h0->addInt32($c->mulInt(5, 3)); # $h0 += self::mul($c, 5);
$c = $h0->shiftRight(26); # $c = $h0 >> 26;
$h0 = $h0->mask(0x3ffffff); # $h0 &= 0x3ffffff;
$h1 = $h1->addInt32($c); # $h1 += $c;
/* compute h + -p */
$g0 = $h0->addInt(5);
$c = $g0->shiftRight(26);
$g0 = $g0->mask(0x3ffffff);
$g1 = $h1->addInt32($c);
$c = $g1->shiftRight(26);
$g1 = $g1->mask(0x3ffffff);
$g2 = $h2->addInt32($c);
$c = $g2->shiftRight(26);
$g2 = $g2->mask(0x3ffffff);
$g3 = $h3->addInt32($c);
$c = $g3->shiftRight(26);
$g3 = $g3->mask(0x3ffffff);
$g4 = $h4->addInt32($c)->subInt(1 << 26);
# $mask = ($g4 >> 31) - 1;
/* select h if h < p, or h + -p if h >= p */
$mask = (int) (($g4->toInt() >> 31) + 1);
$g0 = $g0->mask($mask);
$g1 = $g1->mask($mask);
$g2 = $g2->mask($mask);
$g3 = $g3->mask($mask);
$g4 = $g4->mask($mask);
/** @var int $mask */
$mask = (~$mask) & 0xffffffff;
$h0 = $h0->mask($mask)->orInt32($g0);
$h1 = $h1->mask($mask)->orInt32($g1);
$h2 = $h2->mask($mask)->orInt32($g2);
$h3 = $h3->mask($mask)->orInt32($g3);
$h4 = $h4->mask($mask)->orInt32($g4);
/* h = h % (2^128) */
$h0 = $h0->orInt32($h1->shiftLeft(26));
$h1 = $h1->shiftRight(6)->orInt32($h2->shiftLeft(20));
$h2 = $h2->shiftRight(12)->orInt32($h3->shiftLeft(14));
$h3 = $h3->shiftRight(18)->orInt32($h4->shiftLeft(8));
/* mac = (h + pad) % (2^128) */
$f = $h0->toInt64()->addInt64($this->pad[0]);
$h0 = $f->toInt32();
$f = $h1->toInt64()->addInt64($this->pad[1])->addInt($h0->overflow);
$h1 = $f->toInt32();
$f = $h2->toInt64()->addInt64($this->pad[2])->addInt($h1->overflow);
$h2 = $f->toInt32();
$f = $h3->toInt64()->addInt64($this->pad[3])->addInt($h2->overflow);
$h3 = $f->toInt32();
return $h0->toReverseString() .
$h1->toReverseString() .
$h2->toReverseString() .
$h3->toReverseString();
}