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<?php |
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|
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/** |
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* Class ParagonIE_Sodium_Core32_Int32 |
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* |
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* Encapsulates a 32-bit integer. |
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* |
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* These are immutable. It always returns a new instance. |
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*/ |
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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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* |
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* 0 is the higher 16 bits |
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* 1 is the lower 16 bits |
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*/ |
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public $limbs = array(0, 0); |
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|
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/** |
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* @var int |
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*/ |
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public $overflow = 0; |
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|
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/** |
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* @var bool |
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*/ |
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public $unsignedInt = false; |
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|
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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 $unsignedInt |
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*/ |
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public function __construct($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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/** |
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* Adds two int32 objects |
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* |
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* @param ParagonIE_Sodium_Core32_Int32 $addend |
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* @return ParagonIE_Sodium_Core32_Int32 |
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*/ |
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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 = $addend->limbs[1]; |
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|
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$r1 = $i1 + ($j1 & 0xffff); |
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$carry = $r1 >> 16; |
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|
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$r0 = $i0 + ($j0 & 0xffff) + $carry; |
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$carry = $r0 >> 16; |
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|
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$r0 &= 0xffff; |
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$r1 &= 0xffff; |
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|
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$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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/** |
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* Adds a normal integer to an int32 object |
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* |
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* @param int $int |
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* @return ParagonIE_Sodium_Core32_Int32 |
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* @throws SodiumException |
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* @throws TypeError |
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*/ |
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public function addInt($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) $int; |
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|
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$int = (int) $int; |
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|
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$i0 = $this->limbs[0]; |
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$i1 = $this->limbs[1]; |
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|
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$r1 = $i1 + ($int & 0xffff); |
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$carry = $r1 >> 16; |
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|
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$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 $b |
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* @return int |
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*/ |
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public function compareInt($b = 0) |
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{ |
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$gt = 0; |
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$eq = 1; |
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|
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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 $m |
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* @return ParagonIE_Sodium_Core32_Int32 |
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*/ |
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public function mask($m = 0) |
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{ |
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/** @var int $hi */ |
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$hi = ($m >> 16) & 0xffff; |
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/** @var int $lo */ |
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$lo = ($m & 0xffff); |
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return new ParagonIE_Sodium_Core32_Int32( |
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array( |
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(int) ($this->limbs[0] & $hi), |
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(int) ($this->limbs[1] & $lo) |
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), |
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$this->unsignedInt |
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); |
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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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*/ |
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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 = ($product >> $baseLog2 & 0xffff); |
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$r[$i + $j] = ($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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/** |
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* @param int $int |
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* @return ParagonIE_Sodium_Core32_Int32 |
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*/ |
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public function mulIntFast($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, $b); |
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|
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// Re-apply negation to results |
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if ($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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|
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// 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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|
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/** |
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* @param ParagonIE_Sodium_Core32_Int32 $right |
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* @return ParagonIE_Sodium_Core32_Int32 |
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*/ |
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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 = ($right->limbs[0] >> 15) & 1; |
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|
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$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; |
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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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++$b[0]; |
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} |
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$res = $this->multiplyLong($a, $b); |
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if ($aNeg !== $bNeg) { |
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if ($aNeg !== $bNeg) { |
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for ($i = 0; $i < 2; ++$i) { |
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$res[$i] = ($res[$i] ^ 0xffff) & 0xffff; |
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} |
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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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} |
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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]; |
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} |
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return $return; |
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} |
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282 |
|
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/** |
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* @param int $int |
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* @param int $size |
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* @return ParagonIE_Sodium_Core32_Int32 |
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* @throws SodiumException |
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* @throws TypeError |
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*/ |
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290 |
public function mulInt($int = 0, $size = 0) |
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{ |
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ParagonIE_Sodium_Core32_Util::declareScalarType($int, 'int', 1); |
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ParagonIE_Sodium_Core32_Util::declareScalarType($size, 'int', 2); |
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if (ParagonIE_Sodium_Compat::$fastMult) { |
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return $this->mulIntFast((int) $int); |
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296 |
} |
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297 |
/** @var int $int */ |
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$int = (int) $int; |
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299 |
/** @var int $size */ |
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300 |
$size = (int) $size; |
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301 |
|
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302 |
if (!$size) { |
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$size = 31; |
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304 |
} |
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305 |
/** @var int $size */ |
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306 |
|
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$a = clone $this; |
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308 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
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$return->unsignedInt = $this->unsignedInt; |
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310 |
|
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// Initialize: |
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312 |
$ret0 = 0; |
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313 |
$ret1 = 0; |
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$a0 = $a->limbs[0]; |
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315 |
$a1 = $a->limbs[1]; |
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316 |
|
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317 |
/** @var int $size */ |
|
318 |
/** @var int $i */ |
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319 |
for ($i = $size; $i >= 0; --$i) { |
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320 |
$m = (int) (-($int & 1)); |
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321 |
$x0 = $a0 & $m; |
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322 |
$x1 = $a1 & $m; |
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323 |
|
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324 |
$ret1 += $x1; |
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325 |
$c = $ret1 >> 16; |
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326 |
|
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327 |
$ret0 += $x0 + $c; |
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328 |
|
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329 |
$ret0 &= 0xffff; |
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330 |
$ret1 &= 0xffff; |
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331 |
|
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332 |
$a1 = ($a1 << 1); |
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333 |
$x1 = $a1 >> 16; |
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334 |
$a0 = ($a0 << 1) | $x1; |
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335 |
$a0 &= 0xffff; |
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336 |
$a1 &= 0xffff; |
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337 |
$int >>= 1; |
|
338 |
} |
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339 |
$return->limbs[0] = $ret0; |
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340 |
$return->limbs[1] = $ret1; |
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341 |
return $return; |
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342 |
} |
|
343 |
|
|
344 |
/** |
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345 |
* @param ParagonIE_Sodium_Core32_Int32 $int |
|
346 |
* @param int $size |
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347 |
* @return ParagonIE_Sodium_Core32_Int32 |
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348 |
* @throws SodiumException |
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349 |
* @throws TypeError |
|
350 |
*/ |
|
351 |
public function mulInt32(ParagonIE_Sodium_Core32_Int32 $int, $size = 0) |
|
352 |
{ |
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353 |
ParagonIE_Sodium_Core32_Util::declareScalarType($size, 'int', 2); |
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354 |
if (ParagonIE_Sodium_Compat::$fastMult) { |
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355 |
return $this->mulInt32Fast($int); |
|
356 |
} |
|
357 |
if (!$size) { |
|
358 |
$size = 31; |
|
359 |
} |
|
360 |
/** @var int $size */ |
|
361 |
|
|
362 |
$a = clone $this; |
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363 |
$b = clone $int; |
|
364 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
365 |
$return->unsignedInt = $this->unsignedInt; |
|
366 |
|
|
367 |
// Initialize: |
|
368 |
$ret0 = 0; |
|
369 |
$ret1 = 0; |
|
370 |
$a0 = $a->limbs[0]; |
|
371 |
$a1 = $a->limbs[1]; |
|
372 |
$b0 = $b->limbs[0]; |
|
373 |
$b1 = $b->limbs[1]; |
|
374 |
|
|
375 |
/** @var int $size */ |
|
376 |
/** @var int $i */ |
|
377 |
for ($i = $size; $i >= 0; --$i) { |
|
378 |
$m = (int) (-($b1 & 1)); |
|
379 |
$x0 = $a0 & $m; |
|
380 |
$x1 = $a1 & $m; |
|
381 |
|
|
382 |
$ret1 += $x1; |
|
383 |
$c = $ret1 >> 16; |
|
384 |
|
|
385 |
$ret0 += $x0 + $c; |
|
386 |
|
|
387 |
$ret0 &= 0xffff; |
|
388 |
$ret1 &= 0xffff; |
|
389 |
|
|
390 |
$a1 = ($a1 << 1); |
|
391 |
$x1 = $a1 >> 16; |
|
392 |
$a0 = ($a0 << 1) | $x1; |
|
393 |
$a0 &= 0xffff; |
|
394 |
$a1 &= 0xffff; |
|
395 |
|
|
396 |
$x0 = ($b0 & 1) << 16; |
|
397 |
$b0 = ($b0 >> 1); |
|
398 |
$b1 = (($b1 | $x0) >> 1); |
|
399 |
|
|
400 |
$b0 &= 0xffff; |
|
401 |
$b1 &= 0xffff; |
|
402 |
|
|
403 |
} |
|
404 |
$return->limbs[0] = $ret0; |
|
405 |
$return->limbs[1] = $ret1; |
|
406 |
|
|
407 |
return $return; |
|
408 |
} |
|
409 |
|
|
410 |
/** |
|
411 |
* OR this 32-bit integer with another. |
|
412 |
* |
|
413 |
* @param ParagonIE_Sodium_Core32_Int32 $b |
|
414 |
* @return ParagonIE_Sodium_Core32_Int32 |
|
415 |
*/ |
|
416 |
public function orInt32(ParagonIE_Sodium_Core32_Int32 $b) |
|
417 |
{ |
|
418 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
419 |
$return->unsignedInt = $this->unsignedInt; |
|
420 |
$return->limbs = array( |
|
421 |
(int) ($this->limbs[0] | $b->limbs[0]), |
|
422 |
(int) ($this->limbs[1] | $b->limbs[1]) |
|
423 |
); |
|
424 |
/** @var int overflow */ |
|
425 |
$return->overflow = $this->overflow | $b->overflow; |
|
426 |
return $return; |
|
427 |
} |
|
428 |
|
|
429 |
/** |
|
430 |
* @param int $b |
|
431 |
* @return bool |
|
432 |
*/ |
|
433 |
public function isGreaterThan($b = 0) |
|
434 |
{ |
|
435 |
return $this->compareInt($b) > 0; |
|
436 |
} |
|
437 |
|
|
438 |
/** |
|
439 |
* @param int $b |
|
440 |
* @return bool |
|
441 |
*/ |
|
442 |
public function isLessThanInt($b = 0) |
|
443 |
{ |
|
444 |
return $this->compareInt($b) < 0; |
|
445 |
} |
|
446 |
|
|
447 |
/** |
|
448 |
* @param int $c |
|
449 |
* @return ParagonIE_Sodium_Core32_Int32 |
|
450 |
* @throws SodiumException |
|
451 |
* @throws TypeError |
|
452 |
* @psalm-suppress MixedArrayAccess |
|
453 |
*/ |
|
454 |
public function rotateLeft($c = 0) |
|
455 |
{ |
|
456 |
ParagonIE_Sodium_Core32_Util::declareScalarType($c, 'int', 1); |
|
457 |
/** @var int $c */ |
|
458 |
$c = (int) $c; |
|
459 |
|
|
460 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
461 |
$return->unsignedInt = $this->unsignedInt; |
|
462 |
$c &= 31; |
|
463 |
if ($c === 0) { |
|
464 |
// NOP, but we want a copy. |
|
465 |
$return->limbs = $this->limbs; |
|
466 |
} else { |
|
467 |
/** @var int $c */ |
|
468 |
|
|
469 |
/** @var int $idx_shift */ |
|
470 |
$idx_shift = ($c >> 4) & 1; |
|
471 |
|
|
472 |
/** @var int $sub_shift */ |
|
473 |
$sub_shift = $c & 15; |
|
474 |
|
|
475 |
/** @var array<int, int> $limbs */ |
|
476 |
$limbs =& $return->limbs; |
|
477 |
|
|
478 |
/** @var array<int, int> $myLimbs */ |
|
479 |
$myLimbs =& $this->limbs; |
|
480 |
|
|
481 |
for ($i = 1; $i >= 0; --$i) { |
|
482 |
/** @var int $j */ |
|
483 |
$j = ($i + $idx_shift) & 1; |
|
484 |
/** @var int $k */ |
|
485 |
$k = ($i + $idx_shift + 1) & 1; |
|
486 |
$limbs[$i] = (int) ( |
|
487 |
( |
|
488 |
((int) ($myLimbs[$j]) << $sub_shift) |
|
489 |
| |
|
490 |
((int) ($myLimbs[$k]) >> (16 - $sub_shift)) |
|
491 |
) & 0xffff |
|
492 |
); |
|
493 |
} |
|
494 |
} |
|
495 |
return $return; |
|
496 |
} |
|
497 |
|
|
498 |
/** |
|
499 |
* Rotate to the right |
|
500 |
* |
|
501 |
* @param int $c |
|
502 |
* @return ParagonIE_Sodium_Core32_Int32 |
|
503 |
* @throws SodiumException |
|
504 |
* @throws TypeError |
|
505 |
* @psalm-suppress MixedArrayAccess |
|
506 |
*/ |
|
507 |
public function rotateRight($c = 0) |
|
508 |
{ |
|
509 |
ParagonIE_Sodium_Core32_Util::declareScalarType($c, 'int', 1); |
|
510 |
/** @var int $c */ |
|
511 |
$c = (int) $c; |
|
512 |
|
|
513 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
514 |
$return->unsignedInt = $this->unsignedInt; |
|
515 |
$c &= 31; |
|
516 |
/** @var int $c */ |
|
517 |
if ($c === 0) { |
|
518 |
// NOP, but we want a copy. |
|
519 |
$return->limbs = $this->limbs; |
|
520 |
} else { |
|
521 |
/** @var int $c */ |
|
522 |
|
|
523 |
/** @var int $idx_shift */ |
|
524 |
$idx_shift = ($c >> 4) & 1; |
|
525 |
|
|
526 |
/** @var int $sub_shift */ |
|
527 |
$sub_shift = $c & 15; |
|
528 |
|
|
529 |
/** @var array<int, int> $limbs */ |
|
530 |
$limbs =& $return->limbs; |
|
531 |
|
|
532 |
/** @var array<int, int> $myLimbs */ |
|
533 |
$myLimbs =& $this->limbs; |
|
534 |
|
|
535 |
for ($i = 1; $i >= 0; --$i) { |
|
536 |
/** @var int $j */ |
|
537 |
$j = ($i - $idx_shift) & 1; |
|
538 |
/** @var int $k */ |
|
539 |
$k = ($i - $idx_shift - 1) & 1; |
|
540 |
$limbs[$i] = (int) ( |
|
541 |
( |
|
542 |
((int) ($myLimbs[$j]) >> (int) ($sub_shift)) |
|
543 |
| |
|
544 |
((int) ($myLimbs[$k]) << (16 - (int) ($sub_shift))) |
|
545 |
) & 0xffff |
|
546 |
); |
|
547 |
} |
|
548 |
} |
|
549 |
return $return; |
|
550 |
} |
|
551 |
|
|
552 |
/** |
|
553 |
* @param bool $bool |
|
554 |
* @return self |
|
555 |
*/ |
|
556 |
public function setUnsignedInt($bool = false) |
|
557 |
{ |
|
558 |
$this->unsignedInt = !empty($bool); |
|
559 |
return $this; |
|
560 |
} |
|
561 |
|
|
562 |
/** |
|
563 |
* @param int $c |
|
564 |
* @return ParagonIE_Sodium_Core32_Int32 |
|
565 |
* @throws SodiumException |
|
566 |
* @throws TypeError |
|
567 |
*/ |
|
568 |
public function shiftLeft($c = 0) |
|
569 |
{ |
|
570 |
ParagonIE_Sodium_Core32_Util::declareScalarType($c, 'int', 1); |
|
571 |
/** @var int $c */ |
|
572 |
$c = (int) $c; |
|
573 |
|
|
574 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
575 |
$return->unsignedInt = $this->unsignedInt; |
|
576 |
$c &= 63; |
|
577 |
/** @var int $c */ |
|
578 |
if ($c === 0) { |
|
579 |
$return->limbs = $this->limbs; |
|
580 |
} elseif ($c < 0) { |
|
581 |
/** @var int $c */ |
|
582 |
return $this->shiftRight(-$c); |
|
583 |
} else { |
|
584 |
/** @var int $c */ |
|
585 |
/** @var int $tmp */ |
|
586 |
$tmp = $this->limbs[1] << $c; |
|
587 |
$return->limbs[1] = (int)($tmp & 0xffff); |
|
588 |
/** @var int $carry */ |
|
589 |
$carry = $tmp >> 16; |
|
590 |
|
|
591 |
/** @var int $tmp */ |
|
592 |
$tmp = ($this->limbs[0] << $c) | ($carry & 0xffff); |
|
593 |
$return->limbs[0] = (int) ($tmp & 0xffff); |
|
594 |
} |
|
595 |
return $return; |
|
596 |
} |
|
597 |
|
|
598 |
/** |
|
599 |
* @param int $c |
|
600 |
* @return ParagonIE_Sodium_Core32_Int32 |
|
601 |
* @throws SodiumException |
|
602 |
* @throws TypeError |
|
603 |
* @psalm-suppress MixedAssignment |
|
604 |
* @psalm-suppress MixedOperand |
|
605 |
*/ |
|
606 |
public function shiftRight($c = 0) |
|
607 |
{ |
|
608 |
ParagonIE_Sodium_Core32_Util::declareScalarType($c, 'int', 1); |
|
609 |
/** @var int $c */ |
|
610 |
$c = (int) $c; |
|
611 |
|
|
612 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
613 |
$return->unsignedInt = $this->unsignedInt; |
|
614 |
$c &= 63; |
|
615 |
/** @var int $c */ |
|
616 |
if ($c >= 16) { |
|
617 |
$return->limbs = array( |
|
618 |
(int) ($this->overflow & 0xffff), |
|
619 |
(int) ($this->limbs[0]) |
|
620 |
); |
|
621 |
$return->overflow = $this->overflow >> 16; |
|
622 |
return $return->shiftRight($c & 15); |
|
623 |
} |
|
624 |
if ($c === 0) { |
|
625 |
$return->limbs = $this->limbs; |
|
626 |
} elseif ($c < 0) { |
|
627 |
/** @var int $c */ |
|
628 |
return $this->shiftLeft(-$c); |
|
629 |
} else { |
|
630 |
if (!is_int($c)) { |
|
631 |
throw new TypeError(); |
|
632 |
} |
|
633 |
/** @var int $c */ |
|
634 |
// $return->limbs[0] = (int) (($this->limbs[0] >> $c) & 0xffff); |
|
635 |
$carryLeft = (int) ($this->overflow & ((1 << ($c + 1)) - 1)); |
|
636 |
$return->limbs[0] = (int) ((($this->limbs[0] >> $c) | ($carryLeft << (16 - $c))) & 0xffff); |
|
637 |
$carryRight = (int) ($this->limbs[0] & ((1 << ($c + 1)) - 1)); |
|
638 |
$return->limbs[1] = (int) ((($this->limbs[1] >> $c) | ($carryRight << (16 - $c))) & 0xffff); |
|
639 |
$return->overflow >>= $c; |
|
640 |
} |
|
641 |
return $return; |
|
642 |
} |
|
643 |
|
|
644 |
/** |
|
645 |
* Subtract a normal integer from an int32 object. |
|
646 |
* |
|
647 |
* @param int $int |
|
648 |
* @return ParagonIE_Sodium_Core32_Int32 |
|
649 |
* @throws SodiumException |
|
650 |
* @throws TypeError |
|
651 |
*/ |
|
652 |
public function subInt($int) |
|
653 |
{ |
|
654 |
ParagonIE_Sodium_Core32_Util::declareScalarType($int, 'int', 1); |
|
655 |
/** @var int $int */ |
|
656 |
$int = (int) $int; |
|
657 |
|
|
658 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
659 |
$return->unsignedInt = $this->unsignedInt; |
|
660 |
|
|
661 |
/** @var int $tmp */ |
|
662 |
$tmp = $this->limbs[1] - ($int & 0xffff); |
|
663 |
/** @var int $carry */ |
|
664 |
$carry = $tmp >> 16; |
|
665 |
$return->limbs[1] = (int) ($tmp & 0xffff); |
|
666 |
|
|
667 |
/** @var int $tmp */ |
|
668 |
$tmp = $this->limbs[0] - (($int >> 16) & 0xffff) + $carry; |
|
669 |
$return->limbs[0] = (int) ($tmp & 0xffff); |
|
670 |
return $return; |
|
671 |
} |
|
672 |
|
|
673 |
/** |
|
674 |
* Subtract two int32 objects from each other |
|
675 |
* |
|
676 |
* @param ParagonIE_Sodium_Core32_Int32 $b |
|
677 |
* @return ParagonIE_Sodium_Core32_Int32 |
|
678 |
*/ |
|
679 |
public function subInt32(ParagonIE_Sodium_Core32_Int32 $b) |
|
680 |
{ |
|
681 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
682 |
$return->unsignedInt = $this->unsignedInt; |
|
683 |
|
|
684 |
/** @var int $tmp */ |
|
685 |
$tmp = $this->limbs[1] - ($b->limbs[1] & 0xffff); |
|
686 |
/** @var int $carry */ |
|
687 |
$carry = $tmp >> 16; |
|
688 |
$return->limbs[1] = (int) ($tmp & 0xffff); |
|
689 |
|
|
690 |
/** @var int $tmp */ |
|
691 |
$tmp = $this->limbs[0] - ($b->limbs[0] & 0xffff) + $carry; |
|
692 |
$return->limbs[0] = (int) ($tmp & 0xffff); |
|
693 |
return $return; |
|
694 |
} |
|
695 |
|
|
696 |
/** |
|
697 |
* XOR this 32-bit integer with another. |
|
698 |
* |
|
699 |
* @param ParagonIE_Sodium_Core32_Int32 $b |
|
700 |
* @return ParagonIE_Sodium_Core32_Int32 |
|
701 |
*/ |
|
702 |
public function xorInt32(ParagonIE_Sodium_Core32_Int32 $b) |
|
703 |
{ |
|
704 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
705 |
$return->unsignedInt = $this->unsignedInt; |
|
706 |
$return->limbs = array( |
|
707 |
(int) ($this->limbs[0] ^ $b->limbs[0]), |
|
708 |
(int) ($this->limbs[1] ^ $b->limbs[1]) |
|
709 |
); |
|
710 |
return $return; |
|
711 |
} |
|
712 |
|
|
713 |
/** |
|
714 |
* @param int $signed |
|
715 |
* @return self |
|
716 |
* @throws SodiumException |
|
717 |
* @throws TypeError |
|
718 |
*/ |
|
719 |
public static function fromInt($signed) |
|
720 |
{ |
|
721 |
ParagonIE_Sodium_Core32_Util::declareScalarType($signed, 'int', 1);; |
|
722 |
/** @var int $signed */ |
|
723 |
$signed = (int) $signed; |
|
724 |
|
|
725 |
return new ParagonIE_Sodium_Core32_Int32( |
|
726 |
array( |
|
727 |
(int) (($signed >> 16) & 0xffff), |
|
728 |
(int) ($signed & 0xffff) |
|
729 |
) |
|
730 |
); |
|
731 |
} |
|
732 |
|
|
733 |
/** |
|
734 |
* @param string $string |
|
735 |
* @return self |
|
736 |
* @throws SodiumException |
|
737 |
* @throws TypeError |
|
738 |
*/ |
|
739 |
public static function fromString($string) |
|
740 |
{ |
|
741 |
ParagonIE_Sodium_Core32_Util::declareScalarType($string, 'string', 1); |
|
742 |
$string = (string) $string; |
|
743 |
if (ParagonIE_Sodium_Core32_Util::strlen($string) !== 4) { |
|
744 |
throw new RangeException( |
|
745 |
'String must be 4 bytes; ' . ParagonIE_Sodium_Core32_Util::strlen($string) . ' given.' |
|
746 |
); |
|
747 |
} |
|
748 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
749 |
|
|
750 |
$return->limbs[0] = (int) ((ParagonIE_Sodium_Core32_Util::chrToInt($string[0]) & 0xff) << 8); |
|
751 |
$return->limbs[0] |= (ParagonIE_Sodium_Core32_Util::chrToInt($string[1]) & 0xff); |
|
752 |
$return->limbs[1] = (int) ((ParagonIE_Sodium_Core32_Util::chrToInt($string[2]) & 0xff) << 8); |
|
753 |
$return->limbs[1] |= (ParagonIE_Sodium_Core32_Util::chrToInt($string[3]) & 0xff); |
|
754 |
return $return; |
|
755 |
} |
|
756 |
|
|
757 |
/** |
|
758 |
* @param string $string |
|
759 |
* @return self |
|
760 |
* @throws SodiumException |
|
761 |
* @throws TypeError |
|
762 |
*/ |
|
763 |
public static function fromReverseString($string) |
|
764 |
{ |
|
765 |
ParagonIE_Sodium_Core32_Util::declareScalarType($string, 'string', 1); |
|
766 |
$string = (string) $string; |
|
767 |
if (ParagonIE_Sodium_Core32_Util::strlen($string) !== 4) { |
|
768 |
throw new RangeException( |
|
769 |
'String must be 4 bytes; ' . ParagonIE_Sodium_Core32_Util::strlen($string) . ' given.' |
|
770 |
); |
|
771 |
} |
|
772 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
773 |
|
|
774 |
$return->limbs[0] = (int) ((ParagonIE_Sodium_Core32_Util::chrToInt($string[3]) & 0xff) << 8); |
|
775 |
$return->limbs[0] |= (ParagonIE_Sodium_Core32_Util::chrToInt($string[2]) & 0xff); |
|
776 |
$return->limbs[1] = (int) ((ParagonIE_Sodium_Core32_Util::chrToInt($string[1]) & 0xff) << 8); |
|
777 |
$return->limbs[1] |= (ParagonIE_Sodium_Core32_Util::chrToInt($string[0]) & 0xff); |
|
778 |
return $return; |
|
779 |
} |
|
780 |
|
|
781 |
/** |
|
782 |
* @return array<int, int> |
|
783 |
*/ |
|
784 |
public function toArray() |
|
785 |
{ |
|
786 |
return array((int) ($this->limbs[0] << 16 | $this->limbs[1])); |
|
787 |
} |
|
788 |
|
|
789 |
/** |
|
790 |
* @return string |
|
791 |
* @throws TypeError |
|
792 |
*/ |
|
793 |
public function toString() |
|
794 |
{ |
|
795 |
return |
|
796 |
ParagonIE_Sodium_Core32_Util::intToChr(($this->limbs[0] >> 8) & 0xff) . |
|
797 |
ParagonIE_Sodium_Core32_Util::intToChr($this->limbs[0] & 0xff) . |
|
798 |
ParagonIE_Sodium_Core32_Util::intToChr(($this->limbs[1] >> 8) & 0xff) . |
|
799 |
ParagonIE_Sodium_Core32_Util::intToChr($this->limbs[1] & 0xff); |
|
800 |
} |
|
801 |
|
|
802 |
/** |
|
803 |
* @return int |
|
804 |
*/ |
|
805 |
public function toInt() |
|
806 |
{ |
|
807 |
return (int) ( |
|
808 |
(($this->limbs[0] & 0xffff) << 16) |
|
809 |
| |
|
810 |
($this->limbs[1] & 0xffff) |
|
811 |
); |
|
812 |
} |
|
813 |
|
|
814 |
/** |
|
815 |
* @return ParagonIE_Sodium_Core32_Int32 |
|
816 |
*/ |
|
817 |
public function toInt32() |
|
818 |
{ |
|
819 |
$return = new ParagonIE_Sodium_Core32_Int32(); |
|
820 |
$return->limbs[0] = (int) ($this->limbs[0] & 0xffff); |
|
821 |
$return->limbs[1] = (int) ($this->limbs[1] & 0xffff); |
|
822 |
$return->unsignedInt = $this->unsignedInt; |
|
823 |
$return->overflow = (int) ($this->overflow & 0x7fffffff); |
|
824 |
return $return; |
|
825 |
} |
|
826 |
|
|
827 |
/** |
|
828 |
* @return ParagonIE_Sodium_Core32_Int64 |
|
829 |
*/ |
|
830 |
public function toInt64() |
|
831 |
{ |
|
832 |
$return = new ParagonIE_Sodium_Core32_Int64(); |
|
833 |
$return->unsignedInt = $this->unsignedInt; |
|
834 |
if ($this->unsignedInt) { |
|
835 |
$return->limbs[0] += (($this->overflow >> 16) & 0xffff); |
|
836 |
$return->limbs[1] += (($this->overflow) & 0xffff); |
|
837 |
} else { |
|
838 |
$neg = -(($this->limbs[0] >> 15) & 1); |
|
839 |
$return->limbs[0] = (int)($neg & 0xffff); |
|
840 |
$return->limbs[1] = (int)($neg & 0xffff); |
|
841 |
} |
|
842 |
$return->limbs[2] = (int) ($this->limbs[0] & 0xffff); |
|
843 |
$return->limbs[3] = (int) ($this->limbs[1] & 0xffff); |
|
844 |
return $return; |
|
845 |
} |
|
846 |
|
|
847 |
/** |
|
848 |
* @return string |
|
849 |
* @throws TypeError |
|
850 |
*/ |
|
851 |
public function toReverseString() |
|
852 |
{ |
|
853 |
return ParagonIE_Sodium_Core32_Util::intToChr($this->limbs[1] & 0xff) . |
|
854 |
ParagonIE_Sodium_Core32_Util::intToChr(($this->limbs[1] >> 8) & 0xff) . |
|
855 |
ParagonIE_Sodium_Core32_Util::intToChr($this->limbs[0] & 0xff) . |
|
856 |
ParagonIE_Sodium_Core32_Util::intToChr(($this->limbs[0] >> 8) & 0xff); |
|
857 |
} |
|
858 |
|
|
859 |
/** |
|
860 |
* @return string |
|
861 |
*/ |
|
862 |
public function __toString() |
|
863 |
{ |
|
864 |
try { |
|
865 |
return $this->toString(); |
|
866 |
} catch (TypeError $ex) { |
|
867 |
// PHP engine can't handle exceptions from __toString() |
|
868 |
return ''; |
|
869 |
} |
|
870 |
} |
|
871 |
} |