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常用工具集/Utility/Security/MD5Helper.cs

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+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace CCS.Utility.Security
+{
+    public static class MD5Helper
+    {
+        /// <summary>
+        /// 字符串MD5加密。
+        /// </summary>
+        /// <param name="strOri">需要加密的字符串</param>
+        /// <returns></returns>
+        public static string md5(this string text)
+        {
+            return md5(text, Encoding.Default);
+        }
+        public static string MD5(this string text)
+        {
+            return MD5(text, Encoding.Default);
+        }
+        /// <summary>
+        /// 字符串MD5加密。
+        /// </summary>
+        /// <param name="strOri">需要加密的字符串</param>
+        /// <returns></returns>
+        public static string md5(this string text, Encoding encoder)
+        {
+            // Create a new instance of the MD5CryptoServiceProvider object.
+            System.Security.Cryptography.MD5 md5Hasher = System.Security.Cryptography.MD5.Create();
+            // Convert the input string to a byte array and compute the hash.
+            byte[] data = md5Hasher.ComputeHash(encoder.GetBytes(text));
+            // Create a new Stringbuilder to collect the bytes
+            // and create a string.
+            StringBuilder sBuilder = new StringBuilder();
+            // Loop through each byte of the hashed data 
+            // and format each one as a hexadecimal string.
+            for (int i = 0; i < data.Length; i++)
+            {
+                sBuilder.Append(data[i].ToString("x2"));
+            }
+            // Return the hexadecimal string.
+            return sBuilder.ToString().ToLower();
+        }
+        public static string MD5(this string text, Encoding encoder)
+        {
+            return md5(text, encoder).ToUpper();
+        }
+        /// <summary>
+        /// 文件流MD5加密。
+        /// </summary>
+        /// <param name="stream">需要加密的文件流</param>
+        /// <returns></returns>
+        public static string md5(this Stream stream)
+        {
+            MD5 md5serv = MD5CryptoServiceProvider.Create();
+            byte[] buffer = md5serv.ComputeHash(stream);
+            StringBuilder sb = new StringBuilder();
+            foreach (byte var in buffer)
+            {
+                sb.Append(var.ToString("x2"));
+            }
+            return sb.ToString().ToLower();
+        }
+        public static string MD5(this Stream stream)
+        {
+            return md5(stream).ToUpper();
+        }
+
+        #region MD5加密
+        /// <summary>
+        /// 字符串MD5加密。
+        /// </summary>
+        /// <param name="strOri">需要加密的字符串</param>
+        /// <returns></returns>
+        public static string MD5Encrypt(this string text)
+        {
+            // Create a new instance of the MD5CryptoServiceProvider object.
+            System.Security.Cryptography.MD5 md5Hasher = System.Security.Cryptography.MD5.Create();
+            // Convert the input string to a byte array and compute the hash.
+            byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(text));
+            // Create a new Stringbuilder to collect the bytes
+            // and create a string.
+            StringBuilder sBuilder = new StringBuilder();
+            // Loop through each byte of the hashed data 
+            // and format each one as a hexadecimal string.
+            for (int i = 0; i < data.Length; i++)
+            {
+                sBuilder.Append(data[i].ToString("x2"));
+            }
+            // Return the hexadecimal string.
+            return sBuilder.ToString();
+        }
+
+        /// <summary>
+        /// 文件流MD5加密。
+        /// </summary>
+        /// <param name="stream">需要加密的文件流</param>
+        /// <returns></returns>
+        public static string MD5Encrypt(this Stream stream)
+        {
+            MD5 md5serv = MD5CryptoServiceProvider.Create();
+            byte[] buffer = md5serv.ComputeHash(stream);
+            StringBuilder sb = new StringBuilder();
+            foreach (byte var in buffer)
+            {
+                sb.Append(var.ToString("x2"));
+            }
+            return sb.ToString();
+        }
+        #endregion
+    }
+}