1<?php
  2
  3if (PHP_VERSION_ID < 70000) {
  4    if (!is_callable('sodiumCompatAutoloader')) {
  5        /**
  6         * Sodium_Compat autoloader.
  7         *
  8         * @param string $class Class name to be autoloaded.
  9         *
 10         * @return bool         Stop autoloading?
 11         */
 12        function sodiumCompatAutoloader($class)
 13        {
 14            $namespace = 'ParagonIE_Sodium_';
 15            // Does the class use the namespace prefix?
 16            $len = strlen($namespace);
 17            if (strncmp($namespace, $class, $len) !== 0) {
 18                // no, move to the next registered autoloader
 19                return false;
 20            }
 21
 22            // Get the relative class name
 23            $relative_class = substr($class, $len);
 24
 25            // Replace the namespace prefix with the base directory, replace namespace
 26            // separators with directory separators in the relative class name, append
 27            // with .php
 28            $file = dirname(__FILE__) . '/src/' . str_replace('_', '/', $relative_class) . '.php';
 29            // if the file exists, require it
 30            if (file_exists($file)) {
 31                require_once $file;
 32                return true;
 33            }
 34            return false;
 35        }
 36
 37        // Now that we have an autoloader, let's register it!
 38        spl_autoload_register('sodiumCompatAutoloader');
 39    }
 40} else {
 41    require_once dirname(__FILE__) . '/autoload-php7.php';
 42}
 43
 44/* Explicitly, always load the Compat class: */
 45if (!class_exists('ParagonIE_Sodium_Compat', false)) {
 46    require_once dirname(__FILE__) . '/src/Compat.php';
 47}
 48
 49if (!class_exists('SodiumException', false)) {
 50    require_once dirname(__FILE__) . '/src/SodiumException.php';
 51}
 52if (PHP_VERSION_ID >= 50300) {
 53    // Namespaces didn't exist before 5.3.0, so don't even try to use this
 54    // unless PHP >= 5.3.0
 55    require_once dirname(__FILE__) . '/lib/namespaced.php';
 56    require_once dirname(__FILE__) . '/lib/sodium_compat.php';
 57    if (!defined('SODIUM_CRYPTO_AEAD_AEGIS128L_KEYBYTES')) {
 58        require_once dirname(__FILE__) . '/lib/php84compat_const.php';
 59    }
 60} else {
 61    require_once dirname(__FILE__) . '/src/PHP52/SplFixedArray.php';
 62}
 63if (PHP_VERSION_ID < 70200 || !extension_loaded('sodium')) {
 64    if (PHP_VERSION_ID >= 50300 && !defined('SODIUM_CRYPTO_SCALARMULT_BYTES')) {
 65        require_once dirname(__FILE__) . '/lib/php72compat_const.php';
 66    }
 67    if (PHP_VERSION_ID >= 70000) {
 68        assert(class_exists('ParagonIE_Sodium_Compat'), 'Possible filesystem/autoloader bug?');
 69    } else {
 70        assert(class_exists('ParagonIE_Sodium_Compat'));
 71    }
 72    require_once(dirname(__FILE__) . '/lib/php72compat.php');
 73} elseif (!function_exists('sodium_crypto_stream_xchacha20_xor')) {
 74    // Older versions of {PHP, ext/sodium} will not define these
 75    require_once(dirname(__FILE__) . '/lib/php72compat.php');
 76}
 77if (PHP_VERSION_ID < 80400 || !extension_loaded('sodium')) {
 78    require_once dirname(__FILE__) . '/lib/php84compat.php';
 79}
 80require_once(dirname(__FILE__) . '/lib/stream-xchacha20.php');
 81require_once(dirname(__FILE__) . '/lib/ristretto255.php');
 82