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<?php

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if (class_exists('ParagonIE_Sodium_Core32_HSalsa20', false)) {

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return;

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}

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/**

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* Class ParagonIE_Sodium_Core32_HSalsa20

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abstract class ParagonIE_Sodium_Core32_HSalsa20 extends ParagonIE_Sodium_Core32_Salsa20

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{

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/**

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* Calculate an hsalsa20 hash of a single block

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* HSalsa20 doesn't have a counter and will never be used for more than

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* one block (used to derive a subkey for xsalsa20).

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* @internal You should not use this directly from another application

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* @param string $in

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* @param string $k

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* @param string|null $c

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* @return string

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* @throws SodiumException

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* @throws TypeError

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public static function hsalsa20($in, $k, $c = null)

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{

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/**

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* @var ParagonIE_Sodium_Core32_Int32 $x0

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* @var ParagonIE_Sodium_Core32_Int32 $x1

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* @var ParagonIE_Sodium_Core32_Int32 $x2

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* @var ParagonIE_Sodium_Core32_Int32 $x3

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* @var ParagonIE_Sodium_Core32_Int32 $x4

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* @var ParagonIE_Sodium_Core32_Int32 $x5

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* @var ParagonIE_Sodium_Core32_Int32 $x6

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* @var ParagonIE_Sodium_Core32_Int32 $x7

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* @var ParagonIE_Sodium_Core32_Int32 $x8

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* @var ParagonIE_Sodium_Core32_Int32 $x9

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* @var ParagonIE_Sodium_Core32_Int32 $x10

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* @var ParagonIE_Sodium_Core32_Int32 $x11

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* @var ParagonIE_Sodium_Core32_Int32 $x12

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* @var ParagonIE_Sodium_Core32_Int32 $x13

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* @var ParagonIE_Sodium_Core32_Int32 $x14

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* @var ParagonIE_Sodium_Core32_Int32 $x15

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* @var ParagonIE_Sodium_Core32_Int32 $j0

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* @var ParagonIE_Sodium_Core32_Int32 $j1

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* @var ParagonIE_Sodium_Core32_Int32 $j2

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* @var ParagonIE_Sodium_Core32_Int32 $j3

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* @var ParagonIE_Sodium_Core32_Int32 $j4

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* @var ParagonIE_Sodium_Core32_Int32 $j5

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* @var ParagonIE_Sodium_Core32_Int32 $j6

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* @var ParagonIE_Sodium_Core32_Int32 $j7

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* @var ParagonIE_Sodium_Core32_Int32 $j8

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* @var ParagonIE_Sodium_Core32_Int32 $j9

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* @var ParagonIE_Sodium_Core32_Int32 $j10

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* @var ParagonIE_Sodium_Core32_Int32 $j11

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* @var ParagonIE_Sodium_Core32_Int32 $j12

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* @var ParagonIE_Sodium_Core32_Int32 $j13

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* @var ParagonIE_Sodium_Core32_Int32 $j14

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* @var ParagonIE_Sodium_Core32_Int32 $j15

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if (self::strlen($k) < 32) {

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throw new RangeException('Key must be 32 bytes long');

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}

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if ($c === null) {

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$x0 = new ParagonIE_Sodium_Core32_Int32(array(0x6170, 0x7865));

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$x5 = new ParagonIE_Sodium_Core32_Int32(array(0x3320, 0x646e));

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$x10 = new ParagonIE_Sodium_Core32_Int32(array(0x7962, 0x2d32));

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$x15 = new ParagonIE_Sodium_Core32_Int32(array(0x6b20, 0x6574));

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} else {

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$x0 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 0, 4));

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$x5 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 4, 4));

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$x10 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 8, 4));

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$x15 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 12, 4));

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}

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$x1 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 0, 4));

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$x2 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 4, 4));

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$x3 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 8, 4));

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$x4 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 12, 4));

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$x6 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 0, 4));

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$x7 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 4, 4));

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$x8 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 8, 4));

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$x9 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 12, 4));

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$x11 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 16, 4));

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$x12 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 20, 4));

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$x13 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 24, 4));

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$x14 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 28, 4));

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for ($i = self::ROUNDS; $i > 0; $i -= 2) {

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$x4 = $x4->xorInt32($x0->addInt32($x12)->rotateLeft(7));

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$x8 = $x8->xorInt32($x4->addInt32($x0)->rotateLeft(9));

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$x12 = $x12->xorInt32($x8->addInt32($x4)->rotateLeft(13));

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$x0 = $x0->xorInt32($x12->addInt32($x8)->rotateLeft(18));

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$x9 = $x9->xorInt32($x5->addInt32($x1)->rotateLeft(7));

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$x13 = $x13->xorInt32($x9->addInt32($x5)->rotateLeft(9));

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$x1 = $x1->xorInt32($x13->addInt32($x9)->rotateLeft(13));

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$x5 = $x5->xorInt32($x1->addInt32($x13)->rotateLeft(18));

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$x14 = $x14->xorInt32($x10->addInt32($x6)->rotateLeft(7));

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$x2 = $x2->xorInt32($x14->addInt32($x10)->rotateLeft(9));

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$x6 = $x6->xorInt32($x2->addInt32($x14)->rotateLeft(13));

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$x10 = $x10->xorInt32($x6->addInt32($x2)->rotateLeft(18));

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$x3 = $x3->xorInt32($x15->addInt32($x11)->rotateLeft(7));

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$x7 = $x7->xorInt32($x3->addInt32($x15)->rotateLeft(9));

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$x11 = $x11->xorInt32($x7->addInt32($x3)->rotateLeft(13));

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$x15 = $x15->xorInt32($x11->addInt32($x7)->rotateLeft(18));

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$x1 = $x1->xorInt32($x0->addInt32($x3)->rotateLeft(7));

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$x2 = $x2->xorInt32($x1->addInt32($x0)->rotateLeft(9));

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$x3 = $x3->xorInt32($x2->addInt32($x1)->rotateLeft(13));

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$x0 = $x0->xorInt32($x3->addInt32($x2)->rotateLeft(18));

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$x6 = $x6->xorInt32($x5->addInt32($x4)->rotateLeft(7));

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$x7 = $x7->xorInt32($x6->addInt32($x5)->rotateLeft(9));

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$x4 = $x4->xorInt32($x7->addInt32($x6)->rotateLeft(13));

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$x5 = $x5->xorInt32($x4->addInt32($x7)->rotateLeft(18));

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$x11 = $x11->xorInt32($x10->addInt32($x9)->rotateLeft(7));

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$x8 = $x8->xorInt32($x11->addInt32($x10)->rotateLeft(9));

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$x9 = $x9->xorInt32($x8->addInt32($x11)->rotateLeft(13));

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$x10 = $x10->xorInt32($x9->addInt32($x8)->rotateLeft(18));

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$x12 = $x12->xorInt32($x15->addInt32($x14)->rotateLeft(7));

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$x13 = $x13->xorInt32($x12->addInt32($x15)->rotateLeft(9));

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$x14 = $x14->xorInt32($x13->addInt32($x12)->rotateLeft(13));

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$x15 = $x15->xorInt32($x14->addInt32($x13)->rotateLeft(18));

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}

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return $x0->toReverseString() .

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$x5->toReverseString() .

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$x10->toReverseString() .

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$x15->toReverseString() .

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$x6->toReverseString() .

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$x7->toReverseString() .

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$x8->toReverseString() .

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$x9->toReverseString();

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}

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}

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