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function is not described

ParagonIE_Sodium_Core32_HSalsa20::hsalsa20() public WP 1.0

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).

{} It's a method of the class: ParagonIE_Sodium_Core32_HSalsa20{}

No Hooks.

Return

String. Null. Nothing.

Usage

$result = ParagonIE_Sodium_Core32_HSalsa20::hsalsa20( $in, $k, $c );
$in(string) (required)
-
$k(string) (required)
-
$c *(string null)*

Code of ParagonIE_Sodium_Core32_HSalsa20::hsalsa20() WP 5.7

<?php
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();
}