billyjov · March 12, 2018 01:55 · Mar 12, 2018
diff --git a/rsaauth.md b/rsaauth.md
@@ -0,0 +1,46 @@
+# Error Message 
+- Error type: 500 Internal server error  
+- Error message: `No OpenSSL backend could be obtained for rsaauth`  
+- Error description: Login into TYPO3 is not possible anymore, as no OpenSSL backend for rsaauth is available.
+
+# Possible causes  
+- Extension `rsaauth` is not available locally  
+- `Open ssl` is not available or enabled on current `php` installation  
+
+# Possible solutions 
+
+## Solution 1 (Not recommended)
+- Turn `rsaauth` off by changing `'loginSecurityLevel' => 'rsa'` to `'loginSecurityLevel' => 'normal'` into `LocalConfiguration.php`.  
+
+or 
+
+- Turn off `rsaauth` by adding following lines in your local configurations 
+
+```
+unset($TYPO3_CONF_VARS['BE']['loginSecurityLevel']);
+unset($TYPO3_CONF_VARS['FE']['loginSecurityLevel']);
+$TYPO3_CONF_VARS['EXT']['extList'] = str_replace('rsaauth,','',$TYPO3_CONF_VARS['EXT']['extList']);
+$TYPO3_CONF_VARS['EXT']['extList_FE'] = str_replace('rsaauth,','',$TYPO3_CONF_VARS['EXT']['extList_FE']);
+```
+- EFFECT: It works, because rsa is no longer activated and you can log in to the backend.  
+- AFTER EFFECT: It's  disable some security modules in your backend like password salt and hash process[1]
+
+## Solution 2 (recommended)
+- Turn on the `open ssl` on your current machine  
+* Step 1: Add or uncomment `extension=php_openssl.dll` in your `php.ini` (e.g for `xampp` users `extension=php_openssl.dll`)
+* Step 2: Add `Open ssl` to your environement variable like this (for `xampp` users)
+
+```
+- go to environement variable on window and create new one 
+Name: OPENSSL_CONF
+Value: PATH_TO_XAMPP\php\extras\openssl\openssl.cnf
+```
+
+* Step 3: Restart `Apache` server.  
+* Step 4 (optional): Reboot your computer.  
+
+
+Sources:  
+- [1] https://typo3blogger.de/passwort-sicherheit-erhohen-mit-saltedpasswords/  
+- https://wiki.typo3.org/Exception/CMS/1318283565
+