testing IP exemption, handle corner cases found in testing

composer.json

@@ -25,7 +25,7 @@
 	},
 	"require" : {
 		"php" : "^5.6.0 || ^7.0 || ^8.0",
-		"paragonie/random_compat" : "2.0.19",
+		"paragonie/random_compat" : "2.0.20",
 		"yzalis/identicon" : "2.0.0",
 		"mlocati/ip-lib" : "1.14.0"
 	},

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "c3aa7487ba976536cd3db9a60473ce67",
+    "content-hash": "217f0ba9bdac1014a332a8ba390be949",
     "packages": [
         {
             "name": "mlocati/ip-lib",
@@ -76,16 +76,16 @@
         },
         {
             "name": "paragonie/random_compat",
-            "version": "v2.0.19",
+            "version": "v2.0.20",
             "source": {
                 "type": "git",
                 "url": "https://github.com/paragonie/random_compat.git",
-                "reference": "446fc9faa5c2a9ddf65eb7121c0af7e857295241"
+                "reference": "0f1f60250fccffeaf5dda91eea1c018aed1adc2a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/paragonie/random_compat/zipball/446fc9faa5c2a9ddf65eb7121c0af7e857295241",
+                "url": "https://api.github.com/repos/paragonie/random_compat/zipball/0f1f60250fccffeaf5dda91eea1c018aed1adc2a",
-                "reference": "446fc9faa5c2a9ddf65eb7121c0af7e857295241",
+                "reference": "0f1f60250fccffeaf5dda91eea1c018aed1adc2a",
                 "shasum": ""
             },
             "require": {
@@ -121,7 +121,7 @@
                 "pseudorandom",
                 "random"
             ],
-            "time": "2020-10-15T10:06:57+00:00"
+            "time": "2021-04-17T09:33:01+00:00"
         },
         {
             "name": "yzalis/identicon",

lib/Persistence/TrafficLimiter.php

@@ -121,20 +121,23 @@ class TrafficLimiter extends AbstractPersistence
         $address = \IPLib\Factory::addressFromString($_SERVER[self::$_ipKey]);
         $range   = \IPLib\Factory::rangeFromString(trim($ipRange));
 
-        // If $range is null something went wrong (possible invalid ip given in config). It's here becaue matches($range) does not accepts null vallue
+        // address could not be parsed, we might not be in IP space and try a string comparison instead
+        if ($address == null) {
+            return $_SERVER[self::$_ipKey] === $ipRange;
+        }
+        // range could not be parsed, possibly an invalid ip range given in config
         if ($range == null) {
             return false;
         }
 
-        // Ip-lib does throws and exception when something goes wrong, if so we want to catch it and set contained to false
+        // Ip-lib throws an exception when something goes wrong, if so we want to catch it and set contained to false
         try {
             return $address->matches($range);
         } catch (\Exception $e) {
-            // If something is wrong with matching the ip, we do nothing
+            // If something is wrong with matching the ip, we assume it doesn't match
-        }
-
             return false;
         }
+    }
 
     /**
      * traffic limiter

tst/Persistence/TrafficLimiterTest.php

@@ -35,5 +35,20 @@ class TrafficLimiterTest extends PHPUnit_Framework_TestCase
         $this->assertTrue(TrafficLimiter::canPass(), 'fourth request has different ip and may pass');
         $_SERVER['REMOTE_ADDR'] = '127.0.0.1';
         $this->assertFalse(TrafficLimiter::canPass(), 'fifth request is to fast, may not pass');
+
+        // exempted IPs configuration
+        TrafficLimiter::setExemptedIp('1.2.3.4,10.10.10.0/24,2001:1620:2057::/48');
+        $this->assertFalse(TrafficLimiter::canPass(), 'still too fast and not exempted');
+        $_SERVER['REMOTE_ADDR'] = '10.10.10.10';
+        $this->assertTrue(TrafficLimiter::canPass(), 'IPv4 in exempted range');
+        $this->assertTrue(TrafficLimiter::canPass(), 'request is to fast, but IPv4 in exempted range');
+        $_SERVER['REMOTE_ADDR'] = '2001:1620:2057:dead:beef::cafe:babe';
+        $this->assertTrue(TrafficLimiter::canPass(), 'IPv6 in exempted range');
+        $this->assertTrue(TrafficLimiter::canPass(), 'request is to fast, but IPv6 in exempted range');
+        TrafficLimiter::setExemptedIp('127.*,foobar');
+        $this->assertFalse(TrafficLimiter::canPass(), 'request is to fast, invalid range');
+        $_SERVER['REMOTE_ADDR'] = 'foobar';
+        $this->assertTrue(TrafficLimiter::canPass(), 'non-IP address');
+        $this->assertTrue(TrafficLimiter::canPass(), 'request is to fast, but non-IP address matches exempted range');
     }
 }

vendor/paragonie/random_compat/lib/random.php

@@ -182,6 +182,7 @@ if (!is_callable('random_bytes')) {
         if (!in_array('com', $RandomCompat_disabled_classes)) {
             try {
                 $RandomCompatCOMtest = new COM('CAPICOM.Utilities.1');
+                /** @psalm-suppress TypeDoesNotContainType */
                 if (method_exists($RandomCompatCOMtest, 'GetRandom')) {
                     // See random_bytes_com_dotnet.php
                     require_once $RandomCompatDIR.DIRECTORY_SEPARATOR.'random_bytes_com_dotnet.php';

vendor/paragonie/random_compat/phpunit-autoload.php

@@ -1,14 +0,0 @@
-<?php
-
-require_once __DIR__ . '/psalm-autoload.php';
-
-/**
- * This is necessary for PHPUnit on PHP >= 5.3
- *
- * Class PHPUnit_Framework_TestCase
- */
-if (PHP_VERSION_ID >= 50300) {
-    if (!class_exists('PHPUnit_Framework_TestCase')) {
-        require_once __DIR__ . '/other/phpunit-shim.php';
-    }
-}