Geforce File Manager

NAME	SIZE	ACTIONS
📁 ChaCha20		[ DEL ]
📁 Curve25519		[ DEL ]
📁 Poly1305		[ DEL ]
📁 SecretStream		[ DEL ]
📄 BLAKE2b.php	22,324 B	[ EDIT ] \| [ DEL ]
📄 ChaCha20.php	14,511 B	[ EDIT ] \| [ DEL ]
📄 Curve25519.php	132,974 B	[ EDIT ] \| [ DEL ]
📄 Ed25519.php	15,735 B	[ EDIT ] \| [ DEL ]
📄 HChaCha20.php	5,297 B	[ EDIT ] \| [ DEL ]
📄 HSalsa20.php	6,941 B	[ EDIT ] \| [ DEL ]
📄 Int32.php	24,580 B	[ EDIT ] \| [ DEL ]
📄 Int64.php	31,172 B	[ EDIT ] \| [ DEL ]
📄 Poly1305.php	1,586 B	[ EDIT ] \| [ DEL ]
📄 Salsa20.php	11,506 B	[ EDIT ] \| [ DEL ]
📄 SipHash.php	6,613 B	[ EDIT ] \| [ DEL ]
📄 Util.php	209 B	[ EDIT ] \| [ DEL ]
📄 X25519.php	11,042 B	[ EDIT ] \| [ DEL ]
📄 XChaCha20.php	2,454 B	[ EDIT ] \| [ DEL ]
📄 XSalsa20.php	1,379 B	[ EDIT ] \| [ DEL ]

[ CLOSE ]

EDIT: XSalsa20.php

<?php

if (class_exists('ParagonIE_Sodium_Core32_XSalsa20', false)) {
    return;
}

/**
 * Class ParagonIE_Sodium_Core32_XSalsa20
 */
abstract class ParagonIE_Sodium_Core32_XSalsa20 extends ParagonIE_Sodium_Core32_HSalsa20
{
    /**
     * Expand a key and nonce into an xsalsa20 keystream.
     *
     * @internal You should not use this directly from another application
     *
     * @param int $len
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function xsalsa20($len, $nonce, $key)
    {
        $ret = self::salsa20(
            $len,
            self::substr($nonce, 16, 8),
            self::hsalsa20($nonce, $key)
        );
        return $ret;
    }

/**
     * Encrypt a string with XSalsa20. Doesn't provide integrity.
     *
     * @internal You should not use this directly from another application
     *
     * @param string $message
     * @param string $nonce
     * @param string $key
     * @return string
     * @throws SodiumException
     * @throws TypeError
     */
    public static function xsalsa20_xor($message, $nonce, $key)
    {
        return self::xorStrings(
            $message,
            self::xsalsa20(
                self::strlen($message),
                $nonce,
                $key
            )
        );
    }
}