From a004304061c926a1d916f176b75f7a7ae795e211 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=BE=89=E9=B8=AD=E8=9B=8B?= <huiyadanli@gmail.com>
Date: Sat, 9 Aug 2025 17:15:20 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8F=96=E6=B6=88=E5=85=91=E6=8D=A2=E7=A0=81?=
 =?UTF-8?q?=E4=BD=BF=E7=94=A8=E5=90=8E=E4=B8=8D=E5=86=8D=E5=BC=B9=E5=87=BA?=
 =?UTF-8?q?=E6=AD=A4=E5=89=AA=E5=88=87=E6=9D=BF=E5=86=85=E5=AE=B9=E7=9A=84?=
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MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

---
 .../UseRedeemCode/RedeemCodeManager.cs        | 14 ++++++++
 .../Helpers/Security/MD5Helper.cs             | 35 +++++++++++++++++++
 2 files changed, 49 insertions(+)
 create mode 100644 BetterGenshinImpact/Helpers/Security/MD5Helper.cs

diff --git a/BetterGenshinImpact/GameTask/UseRedeemCode/RedeemCodeManager.cs b/BetterGenshinImpact/GameTask/UseRedeemCode/RedeemCodeManager.cs
index 6a43e593..4dadade8 100644
--- a/BetterGenshinImpact/GameTask/UseRedeemCode/RedeemCodeManager.cs
+++ b/BetterGenshinImpact/GameTask/UseRedeemCode/RedeemCodeManager.cs
@@ -4,6 +4,7 @@ using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
+using BetterGenshinImpact.Helpers.Security;
 using BetterGenshinImpact.View.Windows;
 using TextBox = Wpf.Ui.Controls.TextBox;
 
@@ -11,8 +12,16 @@ namespace BetterGenshinImpact.GameTask.UseRedeemCode;
 
 public class RedeemCodeManager
 {
+    public static HashSet<string> CancelClipboardHash { get; } = [];
+    
     public static async Task ImportFromClipboard(string clipboardText)
     {
+        var md5Hash = MD5Helper.ComputeMD5(clipboardText);
+        if (CancelClipboardHash.Contains(md5Hash))
+        {
+            return;
+        }
+        
         var codes = ExtractAllCodes(clipboardText);
         if (codes.Count == 0)
         {
@@ -36,6 +45,11 @@ public class RedeemCodeManager
 
         if (p.DialogResult != true)
         {
+            if (CancelClipboardHash.Count > 10)
+            {
+                CancelClipboardHash.Clear();
+            }
+            CancelClipboardHash.Add(md5Hash);
             return;
         }
 
diff --git a/BetterGenshinImpact/Helpers/Security/MD5Helper.cs b/BetterGenshinImpact/Helpers/Security/MD5Helper.cs
new file mode 100644
index 00000000..732d2e8f
--- /dev/null
+++ b/BetterGenshinImpact/Helpers/Security/MD5Helper.cs
@@ -0,0 +1,35 @@
+using System.Security.Cryptography;
+using System.Text;
+
+namespace BetterGenshinImpact.Helpers.Security;
+
+public static class MD5Helper
+{
+    /// <summary>
+    /// 计算字符串的MD5哈希值
+    /// </summary>
+    /// <param name="input">输入字符串</param>
+    /// <param name="encoding">字符编码，默认为UTF-8</param>
+    /// <returns>32位小写MD5哈希值</returns>
+    public static string ComputeMD5(string input, Encoding encoding = null)
+    {
+        if (string.IsNullOrEmpty(input))
+            return string.Empty;
+
+        encoding = encoding ?? Encoding.UTF8;
+        
+        using (var md5 = MD5.Create())
+        {
+            byte[] inputBytes = encoding.GetBytes(input);
+            byte[] hashBytes = md5.ComputeHash(inputBytes);
+            
+            // 将字节数组转换为十六进制字符串
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < hashBytes.Length; i++)
+            {
+                sb.Append(hashBytes[i].ToString("x2"));
+            }
+            return sb.ToString();
+        }
+    }
+}
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