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/home/tahkoom/public_html/wp-includes/sodium_compat/src/Core32/Poly1305/State.php
<?php

if (class_exists('ParagonIE_Sodium_Core32_Poly1305_State', false)) {
    return;
}

/**
 * Class ParagonIE_Sodium_Core32_Poly1305_State
 */
class ParagonIE_Sodium_Core32_Poly1305_State extends ParagonIE_Sodium_Core32_Util
{
    /**
     * @var array<int, int>
     */
    protected $buffer = array();

    /**
     * @var bool
     */
    protected $final = false;

    /**
     * @var array<int, ParagonIE_Sodium_Core32_Int32>
     */
    public $h;

    /**
     * @var int
     */
    protected $leftover = 0;

    /**
     * @var array<int, ParagonIE_Sodium_Core32_Int32>
     */
    public $r;

    /**
     * @var array<int, ParagonIE_Sodium_Core32_Int64>
     */
    public $pad;

    /**
     * ParagonIE_Sodium_Core32_Poly1305_State constructor.
     *
     * @internal You should not use this directly from another application
     *
     * @param string $key
     * @throws InvalidArgumentException
     * @throws SodiumException
     * @throws TypeError
     */
    public function __construct($key = '')
    {
        if (self::strlen($key) < 32) {
            throw new InvalidArgumentException(
                'Poly1305 requires a 32-byte key'
            );
        }
        /* r &= 0xffffffc0ffffffc0ffffffc0fffffff */
        $this->r = array(
            // st->r[0] = ...
            ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 0, 4))
                ->setUnsignedInt(true)
                ->mask(0x3ffffff),
            // st->r[1] = ...
            ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 3, 4))
                ->setUnsignedInt(true)
                ->shiftRight(2)
                ->mask(0x3ffff03),
            // st->r[2] = ...
            ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 6, 4))
                ->setUnsignedInt(true)
                ->shiftRight(4)
                ->mask(0x3ffc0ff),
            // st->r[3] = ...
            ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 9, 4))
                ->setUnsignedInt(true)
                ->shiftRight(6)
                ->mask(0x3f03fff),
            // st->r[4] = ...
            ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 12, 4))
                ->setUnsignedInt(true)
                ->shiftRight(8)
                ->mask(0x00fffff)
        );

        /* h = 0 */
        $this->h = array(
            new ParagonIE_Sodium_Core32_Int32(array(0, 0), true),
            new ParagonIE_Sodium_Core32_Int32(array(0, 0), true),
            new ParagonIE_Sodium_Core32_Int32(array(0, 0), true),
            new ParagonIE_Sodium_Core32_Int32(array(0, 0), true),
            new ParagonIE_Sodium_Core32_Int32(array(0, 0), true)
        );

        /* save pad for later */
        $this->pad = array(
            ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 16, 4))
                ->setUnsignedInt(true)->toInt64(),
            ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 20, 4))
                ->setUnsignedInt(true)->toInt64(),
            ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 24, 4))
                ->setUnsignedInt(true)->toInt64(),
            ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 28, 4))
                ->setUnsignedInt(true)->toInt64(),
        );

        $this->leftover = 0;
        $this->final = false;
    }

    /**
     * @internal You should not use this directly from another application
     *
     * @param string $message
     * @return self
     * @throws SodiumException
     * @throws TypeError
     */
    public function update($message = '')
    {
        $bytes = self::strlen($message);

        /* handle leftover */
        if ($this->leftover) {
            /** @var int $want */
            $want = ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE - $this->leftover;
            if ($want > $bytes) {
                $want = $bytes;
            }
            for ($i = 0; $i < $want; ++$i) {
                $mi = self::chrToInt($message[$i]);
                $this->buffer[$this->leftover + $i] = $mi;
            }
            // We snip off the leftmost bytes.
            $message = self::substr($message, $want);
            $bytes = self::strlen($message);
            $this->leftover += $want;
            if ($this->leftover < ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE) {
                // We still don't have enough to run $this->blocks()
                return $this;
            }

            $this->blocks(
                self::intArrayToString($this->buffer),
                ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE
            );
            $this->leftover = 0;
        }

        /* process full blocks */
        if ($bytes >= ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE) {
            /** @var int $want */
            $want = $bytes & ~(ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE - 1);
            if ($want >= ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE) {
                /** @var string $block */
                $block = self::substr($message, 0, $want);
                if (self::strlen($block) >= ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE) {
                    $this->blocks($block, $want);
                    $message = self::substr($message, $want);
                    $bytes = self::strlen($message);
                }
            }
        }

        /* store leftover */
        if ($bytes) {
            for ($i = 0; $i < $bytes; ++$i) {
                $mi = self::chrToInt($message[$i]);
                $this->buffer[$this->leftover + $i] = $mi;
            }
            $this->leftover = (int) $this->leftover + $bytes;
        }
        return $this;
    }

    /**
     * @internal You should not use this directly from another application
     *
     * @param string $message
     * @param int $bytes
     * @return self
     * @throws SodiumException
     * @throws TypeError
     */
    public function blocks($message, $bytes)
    {
        if (self::strlen($message) < 16) {
            $message = str_pad($message, 16, "\x00", STR_PAD_RIGHT);
        }
        $hibit = ParagonIE_Sodium_Core32_Int32::fromInt((int) ($this->final ? 0 : 1 << 24)); /* 1 << 128 */
        $hibit->setUnsignedInt(true);
        $zero = new ParagonIE_Sodium_Core32_Int64(array(0, 0, 0, 0), true);
        /**
         * @var ParagonIE_Sodium_Core32_Int64 $d0
         * @var ParagonIE_Sodium_Core32_Int64 $d1
         * @var ParagonIE_Sodium_Core32_Int64 $d2
         * @var ParagonIE_Sodium_Core32_Int64 $d3
         * @var ParagonIE_Sodium_Core32_Int64 $d4
         * @var ParagonIE_Sodium_Core32_Int64 $r0
         * @var ParagonIE_Sodium_Core32_Int64 $r1
         * @var ParagonIE_Sodium_Core32_Int64 $r2
         * @var ParagonIE_Sodium_Core32_Int64 $r3
         * @var ParagonIE_Sodium_Core32_Int64 $r4
         *
         * @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
         */
        $r0 = $this->r[0]->toInt64();
        $r1 = $this->r[1]->toInt64();
        $r2 = $this->r[2]->toInt64();
        $r3 = $this->r[3]->toInt64();
        $r4 = $this->r[4]->toInt64();

        $s1 = $r1->toInt64()->mulInt(5, 3);
        $s2 = $r2->toInt64()->mulInt(5, 3);
        $s3 = $r3->toInt64()->mulInt(5, 3);
        $s4 = $r4->toInt64()->mulInt(5, 3);

        $h0 = $this->h[0];
        $h1 = $this->h[1];
        $h2 = $this->h[2];
        $h3 = $this->h[3];
        $h4 = $this->h[4];

        while ($bytes >= ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE) {
            /* h += m[i] */
            $h0 = $h0->addInt32(
                ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 0, 4))
                    ->mask(0x3ffffff)
            )->toInt64();
            $h1 = $h1->addInt32(
                ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 3, 4))
                    ->shiftRight(2)
                    ->mask(0x3ffffff)
            )->toInt64();
            $h2 = $h2->addInt32(
                ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 6, 4))
                    ->shiftRight(4)
                    ->mask(0x3ffffff)
            )->toInt64();
            $h3 = $h3->addInt32(
                ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 9, 4))
                    ->shiftRight(6)
                    ->mask(0x3ffffff)
            )->toInt64();
            $h4 = $h4->addInt32(
                ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 12, 4))
                    ->shiftRight(8)
                    ->orInt32($hibit)
            )->toInt64();

            /* h *= r */
            $d0 = $zero
                ->addInt64($h0->mulInt64($r0, 27))
                ->addInt64($s4->mulInt64($h1, 27))
                ->addInt64($s3->mulInt64($h2, 27))
                ->addInt64($s2->mulInt64($h3, 27))
                ->addInt64($s1->mulInt64($h4, 27));

            $d1 = $zero
                ->addInt64($h0->mulInt64($r1, 27))
                ->addInt64($h1->mulInt64($r0, 27))
                ->addInt64($s4->mulInt64($h2, 27))
                ->addInt64($s3->mulInt64($h3, 27))
                ->addInt64($s2->mulInt64($h4, 27));

            $d2 = $zero
                ->addInt64($h0->mulInt64($r2, 27))
                ->addInt64($h1->mulInt64($r1, 27))
                ->addInt64($h2->mulInt64($r0, 27))
                ->addInt64($s4->mulInt64($h3, 27))
                ->addInt64($s3->mulInt64($h4, 27));

            $d3 = $zero
                ->addInt64($h0->mulInt64($r3, 27))
                ->addInt64($h1->mulInt64($r2, 27))
                ->addInt64($h2->mulInt64($r1, 27))
                ->addInt64($h3->mulInt64($r0, 27))
                ->addInt64($s4->mulInt64($h4, 27));

            $d4 = $zero
                ->addInt64($h0->mulInt64($r4, 27))
                ->addInt64($h1->mulInt64($r3, 27))
                ->addInt64($h2->mulInt64($r2, 27))
                ->addInt64($h3->mulInt64($r1, 27))
                ->addInt64($h4->mulInt64($r0, 27));

            /* (partial) h %= p */
            $c = $d0->shiftRight(26);
            $h0 = $d0->toInt32()->mask(0x3ffffff);
            $d1 = $d1->addInt64($c);

            $c = $d1->shiftRight(26);
            $h1 = $d1->toInt32()->mask(0x3ffffff);
            $d2 = $d2->addInt64($c);

            $c = $d2->shiftRight(26);
            $h2 = $d2->toInt32()->mask(0x3ffffff);
            $d3 = $d3->addInt64($c);

            $c = $d3->shiftRight(26);
            $h3 = $d3->toInt32()->mask(0x3ffffff);
            $d4 = $d4->addInt64($c);

            $c = $d4->shiftRight(26);
            $h4 = $d4->toInt32()->mask(0x3ffffff);
            $h0 = $h0->addInt32($c->toInt32()->mulInt(5, 3));

            $c = $h0->shiftRight(26);
            $h0 = $h0->mask(0x3ffffff);
            $h1 = $h1->addInt32($c);

            // Chop off the left 32 bytes.
            $message = self::substr(
                $message,
                ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE
            );
            $bytes -= ParagonIE_Sodium_Core32_Poly1305::BLOCK_SIZE;
        }

        /** @var array<int, ParagonIE_Sodium_Core32_Int32> $h */
        $this->h = array($h0, $h1, $h2, $h3, $h4);
        return $this;
    }

    /**
     * @internal You should not use this directly from another application
     *
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    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;

        $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();
    }
}
Path: home/tahkoom/public_html/wp-includes/sodium_compat/src/Core32/Poly1305
“ألعاب الواقع الافتراضي: رحلة إلى عوالم تفاعلية غامرة” – tahkoom.com
ميديا

“ألعاب الواقع الافتراضي: رحلة إلى عوالم تفاعلية غامرة”

يونيو 12, 2025
4٬500 أقل من دقيقة

في هذا التقرير المصور، نأخذك في جولة بصرية داخل عالم ألعاب الواقع الافتراضي (VR)، حيث تندمج التكنولوجيا مع الترفيه لخلق تجارب لا مثيل لها. من خلال نظارات الواقع الافتراضي المتطورة، يمكن للاعبين التفاعل مع بيئات ثلاثية الأبعاد، مما يتيح لهم الانغماس الكامل في الألعاب. سنستعرض أبرز الألعاب المتاحة، مثل “Beat Saber” و”Half-Life: Alyx”، التي تقدم تجارب تفاعلية مبتكرة. كما نسلط الضوء على التحديات التي تواجه هذه التقنية، مثل التكلفة المرتفعة ومشاكل الراحة أثناء الاستخدام الطويل. انضم إلينا لاكتشاف كيف يُعيد الواقع الافتراضي تعريف مفهوم اللعب ويشكل مستقبل صناعة الألعاب.

يونيو 12, 2025
4٬500 أقل من دقيقة
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