Use libsodium to encrypt all data, related to OAuth2

api/components/OAuth2/CryptTrait.php

@@ -0,0 +1,26 @@
+<?php
+declare(strict_types=1);
+
+namespace api\components\OAuth2;
+
+use Yii;
+
+/**
+ * This trait is intended to override the standard data encryption behavior
+ * with the help of \Defuse\Crypto\Crypto class, because the resultant string
+ * is much larger than the original one.
+ *
+ * The implementation under the hood relies on using libsodium library
+ * that provides more compact result values.
+ */
+trait CryptTrait {
+
+    protected function encrypt($unencryptedData): string {
+        return Yii::$app->tokens->encryptValue($unencryptedData);
+    }
+
+    protected function decrypt($encryptedData): string {
+        return Yii::$app->tokens->decryptValue($encryptedData);
+    }
+
+}