diff --git a/src/NSExt/StringExtensions.cs b/src/NSExt/StringExtensions.cs
index 470319d..d0a6104 100644
--- a/src/NSExt/StringExtensions.cs
+++ b/src/NSExt/StringExtensions.cs
@@ -5,13 +5,14 @@
 // @created: 07/26/2022 21:57
 
 using System.Globalization;
+using System.Security.Cryptography;
 using System.Text;
 using System.Text.RegularExpressions;
 using System.Web;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
-using SshNet.Security.Cryptography;
 using HMACMD5 = System.Security.Cryptography.HMACMD5;
+using MD5 = SshNet.Security.Cryptography.MD5;
 
 // ReSharper disable UnusedMember.Global
 
@@ -255,6 +256,37 @@ public static class StringExtensions
     }
 
 
+    /// <summary>
+    ///     对一个字符串进行sha1 hash运算
+    /// </summary>
+    /// <param name="me">字符串</param>
+    /// <param name="e">字符串使用的编码</param>
+    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
+    public static string Sha1(this string me, Encoding e)
+    {
+        using var sha1 = SHA1.Create();
+        return BitConverter.ToString(sha1.ComputeHash(e.GetBytes(me)))
+                           .Replace("-", string.Empty)
+                           .ToLower(CultureInfo.CurrentCulture);
+    }
+
+    /// <summary>
+    /// 对一个字符串进行sha1 hash运算
+    /// </summary>
+    /// <param name="me">对一个字符串进行sha1 hash运算</param>
+    /// <param name="secret">密钥</param>
+    /// <param name="e">使用的编码</param>
+    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
+    public static string HmacSha1(this string me, string secret, Encoding e)
+    {
+        using var hmacSha1 = new HMACSHA1(e.GetBytes(secret));
+
+        return BitConverter.ToString(hmacSha1.ComputeHash(e.GetBytes(me)))
+                           .Replace("-", string.Empty)
+                           .ToLower(CultureInfo.CurrentCulture);
+    }
+
+
     /// <summary>
     ///     对一个字符串进行md5hash运算
     /// </summary>