From 2d8cae567a9bde420173a7b877eeb554360635a8 Mon Sep 17 00:00:00 2001
From: David Zhang <crispgm@gmail.com>
Date: Thu, 12 Sep 2024 11:11:43 +0800
Subject: [PATCH] feat(signature): switch from sha1 to sha256 to adapt feishu's
 breaking change

---
 card.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/card.go b/card.go
index 5b1242a..d6dd29e 100644
--- a/card.go
+++ b/card.go
@@ -2,7 +2,7 @@ package larkhertz
 
 import (
 	"context"
-	"crypto/sha1"
+	"crypto/sha256"
 	"encoding/json"
 	"fmt"
 	"strings"
@@ -59,7 +59,7 @@ func (opt LarkMiddleware) cardSignature(nonce string, timestamp string, body str
 	b.WriteString(token)
 	b.WriteString(body)
 	bs := []byte(b.String())
-	h := sha1.New()
+	h := sha256.New()
 	h.Write(bs)
 	bs = h.Sum(nil)
 	return fmt.Sprintf("%x", bs)