configurable max uid length | close #724

src/config/config.js

@@ -167,5 +167,11 @@ export default {
    * @memberof module:config
    * @property {String} node_store
    */
-  node_store:    "./openpgp.store"
+  node_store:    "./openpgp.store",
+  /**
+   * Max userid string length (used for parsing)
+   * @memberof module:config
+   * @property {Integer} max_userid_length
+   */
+  max_userid_length: 1024 * 5
 };

src/util.js

@@ -591,6 +591,9 @@ export default {
    * Parse user id.
    */
   parseUserId: function(userid) {
+    if(userid.length > config.max_userid_length) {
+      throw new Error('User id string is too long');
+    }
     try {
       const [{ phrase: name, address: email, comment }] = rfc2822.parse(userid);
       return { name, email, comment: comment.replace(/^\(|\)$/g, '') };