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<?php

[0] Fix | Delete

[1] Fix | Delete

/**

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* Class ParagonIE_Sodium_Core32_Int32

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* Encapsulates a 32-bit integer.

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* These are immutable. It always returns a new instance.

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class ParagonIE_Sodium_Core32_Int32

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{

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/**

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* @var array<int, int> - two 16-bit integers

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* 0 is the higher 16 bits

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* 1 is the lower 16 bits

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public $limbs = array(0, 0);

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/**

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* @var int

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public $overflow = 0;

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/**

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* @var bool

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public $unsignedInt = false;

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/**

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* ParagonIE_Sodium_Core32_Int32 constructor.

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* @param array $array

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* @param bool $unsignedInt

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public function __construct($array = array(0, 0), $unsignedInt = false)

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{

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$this->limbs = array(

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(int) $array[0],

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(int) $array[1]

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);

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$this->overflow = 0;

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$this->unsignedInt = $unsignedInt;

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}

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/**

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* Adds two int32 objects

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* @param ParagonIE_Sodium_Core32_Int32 $addend

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* @return ParagonIE_Sodium_Core32_Int32

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public function addInt32(ParagonIE_Sodium_Core32_Int32 $addend)

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{

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$i0 = $this->limbs[0];

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$i1 = $this->limbs[1];

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$j0 = $addend->limbs[0];

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$j1 = $addend->limbs[1];

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$r1 = $i1 + ($j1 & 0xffff);

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$carry = $r1 >> 16;

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$r0 = $i0 + ($j0 & 0xffff) + $carry;

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$carry = $r0 >> 16;

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$r0 &= 0xffff;

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$r1 &= 0xffff;

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$return = new ParagonIE_Sodium_Core32_Int32(

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array($r0, $r1)

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);

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$return->overflow = $carry;

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$return->unsignedInt = $this->unsignedInt;

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return $return;

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}

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/**

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* Adds a normal integer to an int32 object

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* @param int $int

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* @return ParagonIE_Sodium_Core32_Int32

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* @throws SodiumException

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* @throws TypeError

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public function addInt($int)

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{

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ParagonIE_Sodium_Core32_Util::declareScalarType($int, 'int', 1);

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/** @var int $int */

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$int = (int) $int;

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$int = (int) $int;

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$i0 = $this->limbs[0];

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$i1 = $this->limbs[1];

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$r1 = $i1 + ($int & 0xffff);

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$carry = $r1 >> 16;

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$r0 = $i0 + (($int >> 16) & 0xffff) + $carry;

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$carry = $r0 >> 16;

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$r0 &= 0xffff;

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$r1 &= 0xffff;

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$return = new ParagonIE_Sodium_Core32_Int32(

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array($r0, $r1)

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);

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$return->overflow = $carry;

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$return->unsignedInt = $this->unsignedInt;

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return $return;

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}

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/**

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* @param int $b

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* @return int

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public function compareInt($b = 0)

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{

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$gt = 0;

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$eq = 1;

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$i = 2;

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$j = 0;

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while ($i > 0) {

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--$i;

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/** @var int $x1 */

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$x1 = $this->limbs[$i];

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/** @var int $x2 */

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$x2 = ($b >> ($j << 4)) & 0xffff;

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/** @var int $gt */

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$gt |= (($x2 - $x1) >> 8) & $eq;

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/** @var int $eq */

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$eq &= (($x2 ^ $x1) - 1) >> 8;

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}

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return ($gt + $gt - $eq) + 1;

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}

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/**

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* @param int $m

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* @return ParagonIE_Sodium_Core32_Int32

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public function mask($m = 0)

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{

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/** @var int $hi */

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$hi = ((int) $m >> 16);

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$hi &= 0xffff;

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/** @var int $lo */

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$lo = ((int) $m) & 0xffff;

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return new ParagonIE_Sodium_Core32_Int32(

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array(

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(int) ($this->limbs[0] & $hi),

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(int) ($this->limbs[1] & $lo)

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$this->unsignedInt

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);

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}

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/**

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* @param array<int, int> $a

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* @param array<int, int> $b

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* @param int $baseLog2

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* @return array<int, int>

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public function multiplyLong(array $a, array $b, $baseLog2 = 16)

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{

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$a_l = count($a);

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$b_l = count($b);

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/** @var array<int, int> $r */

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$r = array_fill(0, $a_l + $b_l + 1, 0);

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$base = 1 << $baseLog2;

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for ($i = 0; $i < $a_l; ++$i) {

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$a_i = $a[$i];

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for ($j = 0; $j < $a_l; ++$j) {

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$b_j = $b[$j];

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$product = ($a_i * $b_j) + $r[$i + $j];

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$carry = ((int) $product >> $baseLog2 & 0xffff);

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$r[$i + $j] = ((int) $product - (int) ($carry * $base)) & 0xffff;

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$r[$i + $j + 1] += $carry;

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}

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}

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return array_slice($r, 0, 5);

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}

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[178] Fix | Delete

/**

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* @param int $int

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* @return ParagonIE_Sodium_Core32_Int32

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[182] Fix | Delete

public function mulIntFast($int)

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{

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// Handle negative numbers

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$aNeg = ($this->limbs[0] >> 15) & 1;

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$bNeg = ($int >> 31) & 1;

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$a = array_reverse($this->limbs);

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$b = array(

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$int & 0xffff,

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($int >> 16) & 0xffff

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);

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if ($aNeg) {

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for ($i = 0; $i < 2; ++$i) {

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$a[$i] = ($a[$i] ^ 0xffff) & 0xffff;

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}

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++$a[0];

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}

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if ($bNeg) {

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for ($i = 0; $i < 2; ++$i) {

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$b[$i] = ($b[$i] ^ 0xffff) & 0xffff;

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}

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++$b[0];

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}

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// Multiply

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$res = $this->multiplyLong($a, $b);

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// Re-apply negation to results

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if ($aNeg !== $bNeg) {

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for ($i = 0; $i < 2; ++$i) {

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$res[$i] = (0xffff ^ $res[$i]) & 0xffff;

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}

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// Handle integer overflow

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$c = 1;

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for ($i = 0; $i < 2; ++$i) {

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$res[$i] += $c;

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$c = $res[$i] >> 16;

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$res[$i] &= 0xffff;

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}

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}

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[221] Fix | Delete

// Return our values

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$return = new ParagonIE_Sodium_Core32_Int32();

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$return->limbs = array(

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$res[1] & 0xffff,

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$res[0] & 0xffff

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);

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if (count($res) > 2) {

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$return->overflow = $res[2] & 0xffff;

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}

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$return->unsignedInt = $this->unsignedInt;

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return $return;

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}

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[234] Fix | Delete

/**

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* @param ParagonIE_Sodium_Core32_Int32 $right

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* @return ParagonIE_Sodium_Core32_Int32

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[238] Fix | Delete

public function mulInt32Fast(ParagonIE_Sodium_Core32_Int32 $right)

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{

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$aNeg = ($this->limbs[0] >> 15) & 1;

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$bNeg = ($right->limbs[0] >> 15) & 1;

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[243] Fix | Delete

$a = array_reverse($this->limbs);

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$b = array_reverse($right->limbs);

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if ($aNeg) {

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for ($i = 0; $i < 2; ++$i) {

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$a[$i] = ($a[$i] ^ 0xffff) & 0xffff;

[248] Fix | Delete

}

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++$a[0];

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}

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if ($bNeg) {

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for ($i = 0; $i < 2; ++$i) {

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$b[$i] = ($b[$i] ^ 0xffff) & 0xffff;

[254] Fix | Delete

}

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++$b[0];

[256] Fix | Delete

}

[257] Fix | Delete

$res = $this->multiplyLong($a, $b);

[258] Fix | Delete

if ($aNeg !== $bNeg) {

[259] Fix | Delete

if ($aNeg !== $bNeg) {

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for ($i = 0; $i < 2; ++$i) {

[261] Fix | Delete

$res[$i] = ($res[$i] ^ 0xffff) & 0xffff;

[262] Fix | Delete

}

[263] Fix | Delete

$c = 1;

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for ($i = 0; $i < 2; ++$i) {

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$res[$i] += $c;

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$c = $res[$i] >> 16;

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$res[$i] &= 0xffff;

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}

[269] Fix | Delete

}

[270] Fix | Delete

}

[271] Fix | Delete

$return = new ParagonIE_Sodium_Core32_Int32();

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$return->limbs = array(

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$res[1] & 0xffff,

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$res[0] & 0xffff

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);

[276] Fix | Delete

if (count($res) > 2) {

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$return->overflow = $res[2];

[278] Fix | Delete

}

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return $return;

[280] Fix | Delete

}

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[282] Fix | Delete

/**

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* @param int $int

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* @param int $size

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* @return ParagonIE_Sodium_Core32_Int32

[286] Fix | Delete

* @throws SodiumException

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* @throws TypeError

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[289] Fix | Delete

public function mulInt($int = 0, $size = 0)

[290] Fix | Delete

{

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ParagonIE_Sodium_Core32_Util::declareScalarType($int, 'int', 1);

[292] Fix | Delete

ParagonIE_Sodium_Core32_Util::declareScalarType($size, 'int', 2);

[293] Fix | Delete

if (ParagonIE_Sodium_Compat::$fastMult) {

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return $this->mulIntFast((int) $int);

[295] Fix | Delete

}

[296] Fix | Delete

/** @var int $int */

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$int = (int) $int;

[298] Fix | Delete

/** @var int $size */

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$size = (int) $size;

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[301] Fix | Delete

if (!$size) {

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$size = 31;

[303] Fix | Delete

}

[304] Fix | Delete

/** @var int $size */

[305] Fix | Delete

[306] Fix | Delete

$a = clone $this;

[307] Fix | Delete

$return = new ParagonIE_Sodium_Core32_Int32();

[308] Fix | Delete

$return->unsignedInt = $this->unsignedInt;

[309] Fix | Delete

[310] Fix | Delete

// Initialize:

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$ret0 = 0;

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$ret1 = 0;

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$a0 = $a->limbs[0];

[314] Fix | Delete

$a1 = $a->limbs[1];

[315] Fix | Delete

[316] Fix | Delete

/** @var int $size */

[317] Fix | Delete

/** @var int $i */

[318] Fix | Delete

for ($i = $size; $i >= 0; --$i) {

[319] Fix | Delete

$m = (int) (-($int & 1));

[320] Fix | Delete

$x0 = $a0 & $m;

[321] Fix | Delete

$x1 = $a1 & $m;

[322] Fix | Delete

[323] Fix | Delete

$ret1 += $x1;

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$c = $ret1 >> 16;

[325] Fix | Delete

[326] Fix | Delete

$ret0 += $x0 + $c;

[327] Fix | Delete

[328] Fix | Delete

$ret0 &= 0xffff;

[329] Fix | Delete

$ret1 &= 0xffff;

[330] Fix | Delete

[331] Fix | Delete

$a1 = ($a1 << 1);

[332] Fix | Delete

$x1 = $a1 >> 16;

[333] Fix | Delete

$a0 = ($a0 << 1) | $x1;

[334] Fix | Delete

$a0 &= 0xffff;

[335] Fix | Delete

$a1 &= 0xffff;

[336] Fix | Delete

$int >>= 1;

[337] Fix | Delete

}

[338] Fix | Delete

$return->limbs[0] = $ret0;

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$return->limbs[1] = $ret1;

[340] Fix | Delete

return $return;

[341] Fix | Delete

}

[342] Fix | Delete

[343] Fix | Delete

/**

[344] Fix | Delete

* @param ParagonIE_Sodium_Core32_Int32 $int

[345] Fix | Delete

* @param int $size

[346] Fix | Delete

* @return ParagonIE_Sodium_Core32_Int32

[347] Fix | Delete

* @throws SodiumException

[348] Fix | Delete

* @throws TypeError

[349] Fix | Delete

[350] Fix | Delete

public function mulInt32(ParagonIE_Sodium_Core32_Int32 $int, $size = 0)

[351] Fix | Delete

{

[352] Fix | Delete

ParagonIE_Sodium_Core32_Util::declareScalarType($size, 'int', 2);

[353] Fix | Delete

if (ParagonIE_Sodium_Compat::$fastMult) {

[354] Fix | Delete

return $this->mulInt32Fast($int);

[355] Fix | Delete

}

[356] Fix | Delete

if (!$size) {

[357] Fix | Delete

$size = 31;

[358] Fix | Delete

}

[359] Fix | Delete

/** @var int $size */

[360] Fix | Delete

[361] Fix | Delete

$a = clone $this;

[362] Fix | Delete

$b = clone $int;

[363] Fix | Delete

$return = new ParagonIE_Sodium_Core32_Int32();

[364] Fix | Delete

$return->unsignedInt = $this->unsignedInt;

[365] Fix | Delete

[366] Fix | Delete

// Initialize:

[367] Fix | Delete

$ret0 = 0;

[368] Fix | Delete

$ret1 = 0;

[369] Fix | Delete

$a0 = $a->limbs[0];

[370] Fix | Delete

$a1 = $a->limbs[1];

[371] Fix | Delete

$b0 = $b->limbs[0];

[372] Fix | Delete

$b1 = $b->limbs[1];

[373] Fix | Delete

[374] Fix | Delete

/** @var int $size */

[375] Fix | Delete

/** @var int $i */

[376] Fix | Delete

for ($i = $size; $i >= 0; --$i) {

[377] Fix | Delete

$m = (int) (-($b1 & 1));

[378] Fix | Delete

$x0 = $a0 & $m;

[379] Fix | Delete

$x1 = $a1 & $m;

[380] Fix | Delete

[381] Fix | Delete

$ret1 += $x1;

[382] Fix | Delete

$c = $ret1 >> 16;

[383] Fix | Delete

[384] Fix | Delete

$ret0 += $x0 + $c;

[385] Fix | Delete

[386] Fix | Delete

$ret0 &= 0xffff;

[387] Fix | Delete

$ret1 &= 0xffff;

[388] Fix | Delete

[389] Fix | Delete

$a1 = ($a1 << 1);

[390] Fix | Delete

$x1 = $a1 >> 16;

[391] Fix | Delete

$a0 = ($a0 << 1) | $x1;

[392] Fix | Delete

$a0 &= 0xffff;

[393] Fix | Delete

$a1 &= 0xffff;

[394] Fix | Delete

[395] Fix | Delete

$x0 = ($b0 & 1) << 16;

[396] Fix | Delete

$b0 = ($b0 >> 1);

[397] Fix | Delete

$b1 = (($b1 | $x0) >> 1);

[398] Fix | Delete

[399] Fix | Delete

$b0 &= 0xffff;

[400] Fix | Delete

$b1 &= 0xffff;

[401] Fix | Delete

[402] Fix | Delete

}

[403] Fix | Delete

$return->limbs[0] = $ret0;

[404] Fix | Delete

$return->limbs[1] = $ret1;

[405] Fix | Delete

[406] Fix | Delete

return $return;

[407] Fix | Delete

}

[408] Fix | Delete

[409] Fix | Delete

/**

[410] Fix | Delete

* OR this 32-bit integer with another.

[411] Fix | Delete

[412] Fix | Delete

* @param ParagonIE_Sodium_Core32_Int32 $b

[413] Fix | Delete

* @return ParagonIE_Sodium_Core32_Int32

[414] Fix | Delete

[415] Fix | Delete

public function orInt32(ParagonIE_Sodium_Core32_Int32 $b)

[416] Fix | Delete

{

[417] Fix | Delete

$return = new ParagonIE_Sodium_Core32_Int32();

[418] Fix | Delete

$return->unsignedInt = $this->unsignedInt;

[419] Fix | Delete

$return->limbs = array(

[420] Fix | Delete

(int) ($this->limbs[0] | $b->limbs[0]),

[421] Fix | Delete

(int) ($this->limbs[1] | $b->limbs[1])

[422] Fix | Delete

);

[423] Fix | Delete

/** @var int overflow */

[424] Fix | Delete

$return->overflow = $this->overflow | $b->overflow;

[425] Fix | Delete

return $return;

[426] Fix | Delete

}

[427] Fix | Delete

[428] Fix | Delete

/**

[429] Fix | Delete

* @param int $b

[430] Fix | Delete

* @return bool

[431] Fix | Delete

[432] Fix | Delete

public function isGreaterThan($b = 0)

[433] Fix | Delete

{

[434] Fix | Delete

return $this->compareInt($b) > 0;

[435] Fix | Delete

}

[436] Fix | Delete

[437] Fix | Delete

/**

[438] Fix | Delete

* @param int $b

[439] Fix | Delete

* @return bool

[440] Fix | Delete

[441] Fix | Delete

public function isLessThanInt($b = 0)

[442] Fix | Delete

{

[443] Fix | Delete

return $this->compareInt($b) < 0;

[444] Fix | Delete

}

[445] Fix | Delete

[446] Fix | Delete

/**

[447] Fix | Delete

* @param int $c

[448] Fix | Delete

* @return ParagonIE_Sodium_Core32_Int32

[449] Fix | Delete

* @throws SodiumException

[450] Fix | Delete

* @throws TypeError

[451] Fix | Delete

* @psalm-suppress MixedArrayAccess

[452] Fix | Delete

[453] Fix | Delete

public function rotateLeft($c = 0)

[454] Fix | Delete

{

[455] Fix | Delete

ParagonIE_Sodium_Core32_Util::declareScalarType($c, 'int', 1);

[456] Fix | Delete

/** @var int $c */

[457] Fix | Delete

$c = (int) $c;

[458] Fix | Delete

[459] Fix | Delete

$return = new ParagonIE_Sodium_Core32_Int32();

[460] Fix | Delete

$return->unsignedInt = $this->unsignedInt;

[461] Fix | Delete

$c &= 31;

[462] Fix | Delete

if ($c === 0) {

[463] Fix | Delete

// NOP, but we want a copy.

[464] Fix | Delete

$return->limbs = $this->limbs;

[465] Fix | Delete

} else {

[466] Fix | Delete

/** @var int $c */

[467] Fix | Delete

[468] Fix | Delete

/** @var int $idx_shift */

[469] Fix | Delete

$idx_shift = ($c >> 4) & 1;

[470] Fix | Delete

[471] Fix | Delete

/** @var int $sub_shift */

[472] Fix | Delete

$sub_shift = $c & 15;

[473] Fix | Delete

[474] Fix | Delete

/** @var array<int, int> $limbs */

[475] Fix | Delete

$limbs =& $return->limbs;

[476] Fix | Delete

[477] Fix | Delete

/** @var array<int, int> $myLimbs */

[478] Fix | Delete

$myLimbs =& $this->limbs;

[479] Fix | Delete

[480] Fix | Delete

for ($i = 1; $i >= 0; --$i) {

[481] Fix | Delete

/** @var int $j */

[482] Fix | Delete

$j = ($i + $idx_shift) & 1;

[483] Fix | Delete

/** @var int $k */

[484] Fix | Delete

$k = ($i + $idx_shift + 1) & 1;

[485] Fix | Delete

$limbs[$i] = (int) (

[486] Fix | Delete

(

[487] Fix | Delete

((int) ($myLimbs[$j]) << $sub_shift)

[488] Fix | Delete

[489] Fix | Delete

((int) ($myLimbs[$k]) >> (16 - $sub_shift))

[490] Fix | Delete

) & 0xffff

[491] Fix | Delete

);

[492] Fix | Delete

}

[493] Fix | Delete

}

[494] Fix | Delete

return $return;

[495] Fix | Delete

}

[496] Fix | Delete

[497] Fix | Delete

/**

[498] Fix | Delete

* Rotate to the right

[499] Fix | Delete