File "HChaCha20.php"

Full path: /home/kosmetik/public_html/wp-includes/sodium_compat/src/Core/HChaCha20.php
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<?php

if (class_exists('ParagonIE_Sodium_Core_HChaCha20', false)) {
    return;
}
class ParagonIE_Sodium_Core_HChaCha20 extends ParagonIE_Sodium_Core_ChaCha20
{
    public static function hChaCha20($in = '', $key = '', $c = null)
    {
        $ctx = array();
        if ($c === null) {
            $ctx[0] = 0x61707865;
            $ctx[1] = 0x3320646e;
            $ctx[2] = 0x79622d32;
            $ctx[3] = 0x6b206574;
        } else {
            $ctx[0] = self::load_4(self::substr($c, 0, 4));
            $ctx[1] = self::load_4(self::substr($c, 4, 4));
            $ctx[2] = self::load_4(self::substr($c, 8, 4));
            $ctx[3] = self::load_4(self::substr($c, 12, 4));
        }
        $ctx[4] = self::load_4(self::substr($key, 0, 4));
        $ctx[5] = self::load_4(self::substr($key, 4, 4));
        $ctx[6] = self::load_4(self::substr($key, 8, 4));
        $ctx[7] = self::load_4(self::substr($key, 12, 4));
        $ctx[8] = self::load_4(self::substr($key, 16, 4));
        $ctx[9] = self::load_4(self::substr($key, 20, 4));
        $ctx[10] = self::load_4(self::substr($key, 24, 4));
        $ctx[11] = self::load_4(self::substr($key, 28, 4));
        $ctx[12] = self::load_4(self::substr($in, 0, 4));
        $ctx[13] = self::load_4(self::substr($in, 4, 4));
        $ctx[14] = self::load_4(self::substr($in, 8, 4));
        $ctx[15] = self::load_4(self::substr($in, 12, 4));
        return self::hChaCha20Bytes($ctx);
    }
    protected static function hChaCha20Bytes(array $ctx)
    {
        $x0 = (int) $ctx[0];
        $x1 = (int) $ctx[1];
        $x2 = (int) $ctx[2];
        $x3 = (int) $ctx[3];
        $x4 = (int) $ctx[4];
        $x5 = (int) $ctx[5];
        $x6 = (int) $ctx[6];
        $x7 = (int) $ctx[7];
        $x8 = (int) $ctx[8];
        $x9 = (int) $ctx[9];
        $x10 = (int) $ctx[10];
        $x11 = (int) $ctx[11];
        $x12 = (int) $ctx[12];
        $x13 = (int) $ctx[13];
        $x14 = (int) $ctx[14];
        $x15 = (int) $ctx[15];
        for ($i = 0; $i < 10; ++$i) {
            list($x0, $x4, $x8, $x12) = self::quarterRound($x0, $x4, $x8, $x12);
            list($x1, $x5, $x9, $x13) = self::quarterRound($x1, $x5, $x9, $x13);
            list($x2, $x6, $x10, $x14) = self::quarterRound($x2, $x6, $x10, $x14);
            list($x3, $x7, $x11, $x15) = self::quarterRound($x3, $x7, $x11, $x15);
            list($x0, $x5, $x10, $x15) = self::quarterRound($x0, $x5, $x10, $x15);
            list($x1, $x6, $x11, $x12) = self::quarterRound($x1, $x6, $x11, $x12);
            list($x2, $x7, $x8, $x13) = self::quarterRound($x2, $x7, $x8, $x13);
            list($x3, $x4, $x9, $x14) = self::quarterRound($x3, $x4, $x9, $x14);
        }
        return self::store32_le((int) ($x0 & 0xffffffff)) . self::store32_le((int) ($x1 & 0xffffffff)) . self::store32_le((int) ($x2 & 0xffffffff)) . self::store32_le((int) ($x3 & 0xffffffff)) . self::store32_le((int) ($x12 & 0xffffffff)) . self::store32_le((int) ($x13 & 0xffffffff)) . self::store32_le((int) ($x14 & 0xffffffff)) . self::store32_le((int) ($x15 & 0xffffffff));
    }
}