/var/www/html/limesurvey/application/core/LSSodium.php(141)129      * Decrypt encrypted string.
130      * @param string $sEncryptedString Encrypted string to decrypt
131      * @param bool $bReturnFalseIfError false by default. If TRUE, return false in case of error (bad decryption). Else, return given $encryptedInput value
132      * @return string Return decrypted value (string or unsezialized object) if suceeded. Return FALSE if an error occurs (bad password/salt given) or inpyt encryptedString
133      * @throws SodiumException
134      */
135     public function decrypt($sEncryptedString, $bReturnFalseIfError = false): string
136     {
137         if ($this->bLibraryExists === true) {
138             if (!empty($sEncryptedString) && $sEncryptedString !== 'null') {
139                 $plaintext = ParagonIE_Sodium_Compat::crypto_secretbox_open(base64_decode($sEncryptedString), $this->sEncryptionNonce, $this->sEncryptionSecretBoxKey);
140                 if ($plaintext === false) {
141                     throw new SodiumException(sprintf(gT("Wrong decryption key! Decryption key has changed since this data were last saved, so data can't be decrypted. Please consult our manual at %s.", 'unescaped'), 'https://www.limesurvey.org/manual/Data_encryption#Errors'));
142                 } else {
143                     return $plaintext;
144                 }
145             }
146             return '';
147         }
148         return $sEncryptedString;
149     }
150 
151     /**
152      *
153      * Write encryption key to version.php config file

/var/www/html/limesurvey/application/models/LSActiveRecord.php(355): [b]LSSodium[/b]->[b]decrypt[/b]()350     {
351         // if $value is provided, it would decrypt
352         if (!empty($value)) {
353             // load sodium library
354             $sodium = Yii::app()->sodium;
355             return $sodium->decrypt($value);
356         }
357         return '';
358     }
359 
360     /**

/var/www/html/limesurvey/application/core/LimeMailer.php(230): [b]LimeMailer[/b]->[b]__construct[/b]()225      * return \LimeMailer
226      */
227     public static function getInstance($reset = self::ResetBase)
228     {
229         if ((null === self::$instance) || ($reset == self::ResetComplete)) {
230             self::$instance = new self();
231             /* no need to reset if new */
232             return self::$instance;
233         }
234         /* Some part must be always resetted */
235         if ($reset) {