diff --git a/src/Snap.Hutao/Snap.Hutao/Core/Convert/Md5Convert.cs b/src/Snap.Hutao/Snap.Hutao/Core/Convert/Md5Convert.cs
index 001b5802..e20f3c09 100644
--- a/src/Snap.Hutao/Snap.Hutao/Core/Convert/Md5Convert.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Core/Convert/Md5Convert.cs
@@ -21,9 +21,4 @@ internal abstract class Md5Convert
         byte[] hash = MD5.HashData(Encoding.UTF8.GetBytes(source));
         return System.Convert.ToHexString(hash);
     }
-}
-
-internal class RSAConvert
-{ 
-
 }
\ No newline at end of file
diff --git a/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/ApiEndpoints.cs b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/ApiEndpoints.cs
index a39a503c..716a3d2e 100644
--- a/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/ApiEndpoints.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/ApiEndpoints.cs
@@ -1,8 +1,6 @@
 // Copyright (c) DGP Studio. All rights reserved.
 // Licensed under the MIT license.
 
-using System.ComponentModel.DataAnnotations;
-
 namespace Snap.Hutao.Web.Hoyolab;
 
 /// <summary>
diff --git a/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Passport/RSAUtil.cs b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Passport/RSAUtil.cs
new file mode 100644
index 00000000..44674ea3
--- /dev/null
+++ b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Passport/RSAUtil.cs
@@ -0,0 +1,28 @@
+// Copyright (c) DGP Studio. All rights reserved.
+// Licensed under the MIT license.
+
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Snap.Hutao.Web.Hoyolab.Passport;
+
+/// <summary>
+/// 支持RSA转换
+/// </summary>
+internal static class RSAUtil
+{
+    private const string RsaPublicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDDvekdPMHN3AYhm/vktJT+YJr7cI5DcsNKqdsx5DZX0gDuWFuIjzdwButrIYPNmRJ1G8ybDIF7oDW2eEpm5sMbL9zs\n9ExXCdvqrn51qELbqj0XxtMTIpaCHFSI50PfPpTFV9Xt/hmyVwokoOXFlAEgCn+Q\nCgGs52bFoYMtyi+xEQIDAQAB\n";
+
+    /// <summary>
+    /// 加密
+    /// </summary>
+    /// <param name="source">源</param>
+    /// <returns>字节数组</returns>
+    public static string Encrypt(string source)
+    {
+        RSA rsa = RSA.Create();
+        rsa.ImportFromPem($"-----BEGIN PUBLIC KEY-----\n{RsaPublicKey}\n-----END PUBLIC KEY-----");
+        byte[] bytes = Encoding.UTF8.GetBytes(source);
+        return Convert.ToBase64String(rsa.Encrypt(bytes, RSAEncryptionPadding.Pkcs1));
+    }
+}
\ No newline at end of file