From ebf79d89cf61d4c364c8a74f461c1fdd1dd1d806 Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Tue, 31 Oct 2023 00:45:38 +0800
Subject: [PATCH] feat: Update DigestMethod

---
 src/main/java/me/hatter/tool/signpdf/sign/SigUtils.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/me/hatter/tool/signpdf/sign/SigUtils.java b/src/main/java/me/hatter/tool/signpdf/sign/SigUtils.java
index 38fda2c..486893c 100644
--- a/src/main/java/me/hatter/tool/signpdf/sign/SigUtils.java
+++ b/src/main/java/me/hatter/tool/signpdf/sign/SigUtils.java
@@ -112,7 +112,7 @@ public class SigUtils {
         COSDictionary referenceDict = new COSDictionary();
         referenceDict.setItem(COSName.TYPE, COSName.getPDFName("SigRef"));
         referenceDict.setItem("TransformMethod", COSName.DOCMDP);
-        referenceDict.setItem("DigestMethod", COSName.getPDFName("SHA1"));
+        referenceDict.setItem("DigestMethod", COSName.getPDFName("SHA256"));
         referenceDict.setItem("TransformParams", transformParameters);
         referenceDict.setNeedToBeUpdated(true);