Incorporate https://github.com/thephpleague/oauth2-server/pull/731. Thanks.

Now can handle cr/lf, cr, and lf endings. And on php5 large keys as well.

src/CryptKey.php

@@ -14,7 +14,7 @@ namespace League\OAuth2\Server;
 class CryptKey
 {
     const RSA_KEY_PATTERN =
-        '/^(-----BEGIN (RSA )?(PUBLIC|PRIVATE) KEY-----)(.|\n|\r)+(-----END (RSA )?(PUBLIC|PRIVATE) KEY-----)$/';
+        '/^(-----BEGIN (RSA )?(PUBLIC|PRIVATE) KEY-----).+(-----END (RSA )?(PUBLIC|PRIVATE) KEY-----)$/s';
 
     /**
      * @var string

tests/AuthorizationServerTest.php

@@ -31,7 +31,7 @@ class AuthorizationServerTest extends \PHPUnit_Framework_TestCase
         // Make sure the keys have the correct permissions.
         chmod(__DIR__ . '/Stubs/private.key', 0600);
         chmod(__DIR__ . '/Stubs/public.key', 0600);
-        chmod(__DIR__ . '/Stubs/public.key.crlf', 0600);
+        chmod(__DIR__ . '/Stubs/private.key.crlf', 0600);
     }
 
     public function testRespondToRequestInvalidGrantType()

tests/CryptKeyTest.php

@@ -22,7 +22,7 @@ class CryptKeyTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('file://' . $keyFile, $key->getKeyPath());
         $this->assertEquals('secret', $key->getPassPhrase());
 
-        $keyFile = __DIR__ . '/Stubs/public.key.crlf';
+        $keyFile = __DIR__ . '/Stubs/private.key.crlf';
         $key = new CryptKey($keyFile, 'secret');
 
         $this->assertEquals('file://' . $keyFile, $key->getKeyPath());

tests/Stubs/private.key.crlf

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

tests/Stubs/public.key.crlf

@@ -1,6 +0,0 @@
------BEGIN PUBLIC KEY-----
-MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDOBcFjGUlo3BJ9zjwQLgAHn6Oy
-5Si0uB7MublTiPob8rWTiCE4weAFqzPoAB07vB0t0f8c1R8rmwHMD5ljWPBgJ8Fe
-wtwAUzprOBcau6DWukd/TKxXWeVLAl/NZxijI+jR5QDBYLNBtj1G4LBVHMmINd3r
-yCycbf9ac3rcC8zhrQIDAQAB
------END PUBLIC KEY-----