From 4b7445be8e680996cb5bb016e68a4c064ea8cbb6 Mon Sep 17 00:00:00 2001
From: Nriver <6752679+Nriver@users.noreply.github.com>
Date: Thu, 16 Jan 2025 14:01:59 +0800
Subject: [PATCH] fix compatibility for old encrypted data

---
 dump-db/inc/decrypt.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dump-db/inc/decrypt.ts b/dump-db/inc/decrypt.ts
index ecbc820b5..60a846746 100644
--- a/dump-db/inc/decrypt.ts
+++ b/dump-db/inc/decrypt.ts
@@ -16,7 +16,7 @@ function decryptString(dataKey: any, cipherText: any) {
     return str;
 }
 
-function decrypt(key: any, cipherText: any, ivLength = 16) {
+function decrypt(key: any, cipherText: any) {
     if (cipherText === null) {
         return null;
     }
@@ -27,6 +27,8 @@ function decrypt(key: any, cipherText: any, ivLength = 16) {
 
     try {
         const cipherTextBufferWithIv = Buffer.from(cipherText.toString(), "base64");
+        // old encrypted data can have IV of length 13, see some details here: https://github.com/zadam/trilium/issues/3017
+        const ivLength = cipherTextBufferWithIv.length % 16 === 0 ? 16 : 13;
         const iv = cipherTextBufferWithIv.slice(0, ivLength);
 
         const cipherTextBuffer = cipherTextBufferWithIv.slice(ivLength);