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常用工具集/Utility/Security/SHA1Helper.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace CCS.Utility.Security
+{
+    public static class SHA1Helper
+    {
+        /// <summary>
+        /// 获得一个字符串的加密密文
+
+        /// 此密文为单向加密，即不可逆(解密)密文
+        /// </summary>
+        /// <param name="plainText">待加密明文</param>
+        /// <returns>已加密密文</returns>
+        public static string SHA1(string plainText)
+        {
+            if (string.IsNullOrEmpty(plainText)) return string.Empty;
+            System.Security.Cryptography.SHA1 sha1 = System.Security.Cryptography.SHA1.Create();
+            byte[] buffer = sha1.ComputeHash(Encoding.Default.GetBytes(plainText));
+            StringBuilder sb = new StringBuilder();
+            foreach (byte var in buffer)
+            {
+                sb.Append(var.ToString("x2"));
+            }
+            return sb.ToString().ToLower();
+        }
+
+        public static string SHA1Lower(string plainText)
+        {
+            return SHA1(plainText).ToLower();
+        }
+
+        public static string SHA1Upper(string plainText)
+        {
+            return SHA1(plainText).ToUpper();
+        }
+    }
+}