Took substring of public key and created buffer in XOR

Signed-off-by: S V <vats02581@gmail.com>

Author: svats0001

r2dbc-mysql/src/main/java/io/asyncer/r2dbc/mysql/authentication/MySqlAuthProvider.java

@@ -158,13 +158,10 @@ static byte[] rsaEncryption(byte[] bytesToEncrypt, String serverRsaPublicKeyFile
 
             String key = new String(Files.readAllBytes(Paths.get(serverRsaPublicKeyFile)), Charset.defaultCharset());
 
-            int startIndex = key.indexOf("-----BEGIN PUBLIC KEY-----");
-            int endIndex = key.indexOf("-----END PUBLIC KEY-----") + 23;
-            key = key.substring(startIndex, endIndex + 1);
-            String publicKeyPEM = key
-              .replace("-----BEGIN PUBLIC KEY-----", "")
-              .replaceAll(System.lineSeparator(), "")
-              .replace("-----END PUBLIC KEY-----", "");
+            int startIndex = key.indexOf("-----BEGIN PUBLIC KEY-----") + 26;
+            int endIndex = key.indexOf("-----END PUBLIC KEY-----");
+            key = key.substring(startIndex, endIndex);
+            String publicKeyPEM = key.replaceAll(System.lineSeparator(), "");
 
             byte[] encoded = Base64.getDecoder().decode(publicKeyPEM);