From c6bb87480754054608ed4e35ac1a274ece8d40dd Mon Sep 17 00:00:00 2001
From: David Zhang <crispgm@gmail.com>
Date: Thu, 12 Sep 2024 11:41:56 +0800
Subject: [PATCH] Revert "feat(signature): switch from sha1 to sha256 to adapt
 feishu's breaking change"

This reverts commit 53149eab5f50e443c9f4e612e3462323217d8cb9.
---
 card.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/card.go b/card.go
index 4e0351a..2df6be2 100644
--- a/card.go
+++ b/card.go
@@ -1,7 +1,7 @@
 package larkgin
 
 import (
-	"crypto/sha256"
+	"crypto/sha1"
 	"encoding/json"
 	"fmt"
 	"strings"
@@ -58,7 +58,7 @@ func (opt LarkMiddleware) cardSignature(nonce string, timestamp string, body str
 	b.WriteString(token)
 	b.WriteString(body)
 	bs := []byte(b.String())
-	h := sha256.New()
+	h := sha1.New()
 	h.Write(bs)
 	bs = h.Sum(nil)
 	return fmt.Sprintf("%x", bs)