[3.x] Replace removeSpecialCharacters method with Str Helper Equivalent (#219)

* Bump support requirment to include new String transliteration helper

* Replace removeSpecialCharacters method with Str transliteration method

Co-authored-by: Liam Hackett <liamh@DESKTOP-RS5AQ35.localdomain>

Author: liamh101

auth-backend/ThrottlesLogins.php

@@ -89,7 +89,7 @@ protected function fireLockoutEvent(Request $request)
      */
     protected function throttleKey(Request $request)
     {
-        return $this->removeSpecialCharacters(Str::lower($request->input($this->username())).'|'.$request->ip());
+        return Str::transliterate(Str::lower($request->input($this->username())).'|'.$request->ip());
     }
 
     /**
@@ -121,86 +121,4 @@ public function decayMinutes()
     {
         return property_exists($this, 'decayMinutes') ? $this->decayMinutes : 1;
     }
-
-    /**
-     * Remove special characters that may allow users to bypass rate limiting.
-     *
-     * @param  string  $key
-     * @return string
-     */
-    protected function removeSpecialCharacters($key)
-    {
-        $values = [
-            'ⓐ' => 'a',
-            'ⓑ' => 'b',
-            'ⓒ' => 'c',
-            'ⓓ' => 'd',
-            'ⓔ' => 'e',
-            'ⓕ' => 'f',
-            'ⓖ' => 'g',
-            'ⓗ' => 'h',
-            'ⓘ' => 'i',
-            'ⓙ' => 'j',
-            'ⓚ' => 'k',
-            'ⓛ' => 'l',
-            'ⓜ' => 'm',
-            'ⓝ' => 'n',
-            'ⓞ' => 'o',
-            'ⓟ' => 'p',
-            'ⓠ' => 'q',
-            'ⓡ' => 'r',
-            'ⓢ' => 's',
-            'ⓣ' => 't',
-            'ⓤ' => 'u',
-            'ⓥ' => 'v',
-            'ⓦ' => 'w',
-            'ⓧ' => 'x',
-            'ⓨ' => 'y',
-            'ⓩ' => 'z',
-            '①' => '1',
-            '②' => '2',
-            '③' => '3',
-            '④' => '4',
-            '⑤' => '5',
-            '⑥' => '6',
-            '⑦' => '7',
-            '⑧' => '8',
-            '⑨' => '9',
-            '⑩' => '10',
-            '⑪' => '11',
-            '⑫' => '12',
-            '⑬' => '13',
-            '⑭' => '14',
-            '⑮' => '15',
-            '⑯' => '16',
-            '⑰' => '17',
-            '⑱' => '18',
-            '⑲' => '19',
-            '⑳' => '20',
-            '⓪' => '0',
-            '⓵' => '1',
-            '⓶' => '2',
-            '⓷' => '3',
-            '⓸' => '4',
-            '⓹' => '5',
-            '⓺' => '6',
-            '⓻' => '7',
-            '⓼' => '8',
-            '⓽' => '9',
-            '⓾' => '10',
-            '⓫' => '11',
-            '⓬' => '12',
-            '⓭' => '13',
-            '⓮' => '14',
-            '⓯' => '15',
-            '⓰' => '16',
-            '⓱' => '17',
-            '⓲' => '18',
-            '⓳' => '19',
-            '⓴' => '20',
-            '⓿' => '0',
-        ];
-
-        return strtr($key, $values);
-    }
 }

composer.json

@@ -13,7 +13,7 @@
         "php": "^7.3|^8.0",
         "illuminate/console": "^8.42|^9.0",
         "illuminate/filesystem": "^8.42|^9.0",
-        "illuminate/support": "^8.42|^9.0",
+        "illuminate/support": "^8.82|^9.0",
         "illuminate/validation": "^8.42|^9.0"
     },
     "require-dev": {

tests/AuthBackend/ThrottleLoginsTest.php

@@ -9,32 +9,6 @@
 
 class ThrottleLoginsTest extends TestCase
 {
-    /**
-     * @test
-     * @dataProvider specialCharacterProvider
-     */
-    public function it_can_replace_special_characters(string $value, string $expected): void
-    {
-        $throttle = $this->getMockForTrait(ThrottlesLogins::class);
-        $reflection = new \ReflectionClass($throttle);
-        $method = $reflection->getMethod('removeSpecialCharacters');
-        $method->setAccessible(true);
-
-        $this->assertSame($expected, $method->invoke($throttle, $value));
-    }
-
-    public function specialCharacterProvider(): array
-    {
-        return [
-            ['ⓐⓑⓒⓓⓔⓕⓖⓗⓘⓙⓚⓛⓜⓝⓞⓟⓠⓡⓢⓣⓤⓥⓦⓧⓨⓩ', 'abcdefghijklmnopqrstuvwxyz'],
-            ['⓪①②③④⑤⑥⑦⑧⑨⑩⑪⑫⑬⑭⑮⑯⑰⑱⑲⑳', '01234567891011121314151617181920'],
-            ['⓵⓶⓷⓸⓹⓺⓻⓼⓽⓾', '12345678910'],
-            ['⓿⓫⓬⓭⓮⓯⓰⓱⓲⓳⓴', '011121314151617181920'],
-            ['abcdefghijklmnopqrstuvwxyz', 'abcdefghijklmnopqrstuvwxyz'],
-            ['0123456789', '0123456789'],
-        ];
-    }
-
     /**
      * @test
      * @dataProvider emailProvider