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<?php
if (class_exists('ParagonIE_Sodium_Core32_HSalsa20', false)) {
return;
}
/**
* Class ParagonIE_Sodium_Core32_HSalsa20
*/
abstract class ParagonIE_Sodium_Core32_HSalsa20 extends
ParagonIE_Sodium_Core32_Salsa20
{
/**
* Calculate an hsalsa20 hash of a single block
*
* HSalsa20 doesn't have a counter and will never be used for more
than
* one block (used to derive a subkey for xsalsa20).
*
* @internal You should not use this directly from another application
*
* @param string $in
* @param string $k
* @param string|null $c
* @return string
* @throws SodiumException
* @throws TypeError
*/
public static function hsalsa20($in, $k, $c = null)
{
/**
* @var ParagonIE_Sodium_Core32_Int32 $x0
* @var ParagonIE_Sodium_Core32_Int32 $x1
* @var ParagonIE_Sodium_Core32_Int32 $x2
* @var ParagonIE_Sodium_Core32_Int32 $x3
* @var ParagonIE_Sodium_Core32_Int32 $x4
* @var ParagonIE_Sodium_Core32_Int32 $x5
* @var ParagonIE_Sodium_Core32_Int32 $x6
* @var ParagonIE_Sodium_Core32_Int32 $x7
* @var ParagonIE_Sodium_Core32_Int32 $x8
* @var ParagonIE_Sodium_Core32_Int32 $x9
* @var ParagonIE_Sodium_Core32_Int32 $x10
* @var ParagonIE_Sodium_Core32_Int32 $x11
* @var ParagonIE_Sodium_Core32_Int32 $x12
* @var ParagonIE_Sodium_Core32_Int32 $x13
* @var ParagonIE_Sodium_Core32_Int32 $x14
* @var ParagonIE_Sodium_Core32_Int32 $x15
* @var ParagonIE_Sodium_Core32_Int32 $j0
* @var ParagonIE_Sodium_Core32_Int32 $j1
* @var ParagonIE_Sodium_Core32_Int32 $j2
* @var ParagonIE_Sodium_Core32_Int32 $j3
* @var ParagonIE_Sodium_Core32_Int32 $j4
* @var ParagonIE_Sodium_Core32_Int32 $j5
* @var ParagonIE_Sodium_Core32_Int32 $j6
* @var ParagonIE_Sodium_Core32_Int32 $j7
* @var ParagonIE_Sodium_Core32_Int32 $j8
* @var ParagonIE_Sodium_Core32_Int32 $j9
* @var ParagonIE_Sodium_Core32_Int32 $j10
* @var ParagonIE_Sodium_Core32_Int32 $j11
* @var ParagonIE_Sodium_Core32_Int32 $j12
* @var ParagonIE_Sodium_Core32_Int32 $j13
* @var ParagonIE_Sodium_Core32_Int32 $j14
* @var ParagonIE_Sodium_Core32_Int32 $j15
*/
if (self::strlen($k) < 32) {
throw new RangeException('Key must be 32 bytes
long');
}
if ($c === null) {
$x0 = new ParagonIE_Sodium_Core32_Int32(array(0x6170,
0x7865));
$x5 = new ParagonIE_Sodium_Core32_Int32(array(0x3320,
0x646e));
$x10 = new ParagonIE_Sodium_Core32_Int32(array(0x7962,
0x2d32));
$x15 = new ParagonIE_Sodium_Core32_Int32(array(0x6b20,
0x6574));
} else {
$x0 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 0, 4));
$x5 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 4, 4));
$x10 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 8, 4));
$x15 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 12, 4));
}
$x1 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 0, 4));
$x2 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 4, 4));
$x3 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 8, 4));
$x4 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 12, 4));
$x6 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 0, 4));
$x7 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 4, 4));
$x8 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 8, 4));
$x9 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 12, 4));
$x11 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 16, 4));
$x12 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 20, 4));
$x13 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 24, 4));
$x14 =
ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 28, 4));
for ($i = self::ROUNDS; $i > 0; $i -= 2) {
$x4 =
$x4->xorInt32($x0->addInt32($x12)->rotateLeft(7));
$x8 =
$x8->xorInt32($x4->addInt32($x0)->rotateLeft(9));
$x12 =
$x12->xorInt32($x8->addInt32($x4)->rotateLeft(13));
$x0 =
$x0->xorInt32($x12->addInt32($x8)->rotateLeft(18));
$x9 =
$x9->xorInt32($x5->addInt32($x1)->rotateLeft(7));
$x13 =
$x13->xorInt32($x9->addInt32($x5)->rotateLeft(9));
$x1 =
$x1->xorInt32($x13->addInt32($x9)->rotateLeft(13));
$x5 =
$x5->xorInt32($x1->addInt32($x13)->rotateLeft(18));
$x14 =
$x14->xorInt32($x10->addInt32($x6)->rotateLeft(7));
$x2 =
$x2->xorInt32($x14->addInt32($x10)->rotateLeft(9));
$x6 =
$x6->xorInt32($x2->addInt32($x14)->rotateLeft(13));
$x10 =
$x10->xorInt32($x6->addInt32($x2)->rotateLeft(18));
$x3 =
$x3->xorInt32($x15->addInt32($x11)->rotateLeft(7));
$x7 =
$x7->xorInt32($x3->addInt32($x15)->rotateLeft(9));
$x11 =
$x11->xorInt32($x7->addInt32($x3)->rotateLeft(13));
$x15 =
$x15->xorInt32($x11->addInt32($x7)->rotateLeft(18));
$x1 =
$x1->xorInt32($x0->addInt32($x3)->rotateLeft(7));
$x2 =
$x2->xorInt32($x1->addInt32($x0)->rotateLeft(9));
$x3 =
$x3->xorInt32($x2->addInt32($x1)->rotateLeft(13));
$x0 =
$x0->xorInt32($x3->addInt32($x2)->rotateLeft(18));
$x6 =
$x6->xorInt32($x5->addInt32($x4)->rotateLeft(7));
$x7 =
$x7->xorInt32($x6->addInt32($x5)->rotateLeft(9));
$x4 =
$x4->xorInt32($x7->addInt32($x6)->rotateLeft(13));
$x5 =
$x5->xorInt32($x4->addInt32($x7)->rotateLeft(18));
$x11 =
$x11->xorInt32($x10->addInt32($x9)->rotateLeft(7));
$x8 =
$x8->xorInt32($x11->addInt32($x10)->rotateLeft(9));
$x9 =
$x9->xorInt32($x8->addInt32($x11)->rotateLeft(13));
$x10 =
$x10->xorInt32($x9->addInt32($x8)->rotateLeft(18));
$x12 =
$x12->xorInt32($x15->addInt32($x14)->rotateLeft(7));
$x13 =
$x13->xorInt32($x12->addInt32($x15)->rotateLeft(9));
$x14 =
$x14->xorInt32($x13->addInt32($x12)->rotateLeft(13));
$x15 =
$x15->xorInt32($x14->addInt32($x13)->rotateLeft(18));
}
return $x0->toReverseString() .
$x5->toReverseString() .
$x10->toReverseString() .
$x15->toReverseString() .
$x6->toReverseString() .
$x7->toReverseString() .
$x8->toReverseString() .
$x9->toReverseString();
}
}