new file mode 100644

@@ -0,0 +1,72 @@

+<?php

+

+if (PHP_VERSION_ID < 70000) {

+    if (!is_callable('sodiumCompatAutoloader')) {

+        /**

+         * Sodium_Compat autoloader.

+         *

+         * @param string $class Class name to be autoloaded.

+         *

+         * @return bool         Stop autoloading?

+         */

+        function sodiumCompatAutoloader($class)

+        {

+            $namespace = 'ParagonIE_Sodium_';

+            // Does the class use the namespace prefix?

+            $len = strlen($namespace);

+            if (strncmp($namespace, $class, $len) !== 0) {

+                // no, move to the next registered autoloader

+                return false;

+            }

+

+            // Get the relative class name

+            $relative_class = substr($class, $len);

+

+            // Replace the namespace prefix with the base directory, replace namespace

+            // separators with directory separators in the relative class name, append

+            // with .php

+            $file = dirname(__FILE__) . '/src/' . str_replace('_', '/', $relative_class) . '.php';

+            // if the file exists, require it

+            if (file_exists($file)) {

+                require_once $file;

+                return true;

+            }

+            return false;

+        }

+

+        // Now that we have an autoloader, let's register it!

+        spl_autoload_register('sodiumCompatAutoloader');

+    }

+} else {

+    require_once dirname(__FILE__) . '/autoload-php7.php';

+}

+

+/* Explicitly, always load the Compat class: */

+require_once dirname(__FILE__) . '/src/Compat.php';

+

+if (!class_exists('SodiumException', false)) {

+    require_once dirname(__FILE__) . '/src/SodiumException.php';

+}

+if (PHP_VERSION_ID >= 50300) {

+    // Namespaces didn't exist before 5.3.0, so don't even try to use this

+    // unless PHP >= 5.3.0

+    require_once dirname(__FILE__) . '/lib/namespaced.php';

+    require_once dirname(__FILE__) . '/lib/sodium_compat.php';

+} else {

+    require_once dirname(__FILE__) . '/src/PHP52/SplFixedArray.php';

+}

+if (PHP_VERSION_ID < 70200 || !extension_loaded('sodium')) {

+    if (PHP_VERSION_ID >= 50300 && !defined('SODIUM_CRYPTO_SCALARMULT_BYTES')) {

+        require_once dirname(__FILE__) . '/lib/php72compat_const.php';

+    }

+    if (PHP_VERSION_ID >= 70000) {

+        assert(class_exists('ParagonIE_Sodium_Compat'), 'Possible filesystem/autoloader bug?');

+    } else {

+        assert(class_exists('ParagonIE_Sodium_Compat'));

+    }

+    require_once(dirname(__FILE__) . '/lib/php72compat.php');

+} elseif (!function_exists('sodium_crypto_stream_xchacha20_xor')) {

+    // Older versions of {PHP, ext/sodium} will not define these

+    require_once(dirname(__FILE__) . '/lib/php72compat.php');

+}

+require_once(dirname(__FILE__) . '/lib/ristretto255.php');