<?php
if (class_exists('ParagonIE_Sodium_Core_XSalsa20', false)) {
return;
}
abstract class ParagonIE_Sodium_Core_XSalsa20 extends ParagonIE_Sodium_Core_HSalsa20
{
public static function xsalsa20($len, $nonce, $key)
{
$ret = self::salsa20($len, self::substr($nonce, 16, 8), self::hsalsa20($nonce, $key));
return $ret;
}
public static function xsalsa20_xor($message, $nonce, $key)
{
return self::xorStrings($message, self::xsalsa20(self::strlen($message), $nonce, $key));
}
}