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- using System;
- using System.IO;
- using System.Security.Cryptography;
- using System.Text;
- /// <summary>
- /// MD5相关工具集
- /// </summary>
- public partial class Utils
- {
- /// <summary>
- /// 计算内存数据MD5值
- /// </summary>
- /// <returns>MD5值</returns>
- /// <param name="buffer">内存数据</param>
- public static string Md5(byte[] buffer)
- {
- MD5 md5 = new MD5CryptoServiceProvider();
- byte[] retVal = md5.ComputeHash(buffer);
- StringBuilder sb = new StringBuilder();
- for (int i = 0; i < retVal.Length; i++)
- {
- sb.Append(retVal[i].ToString("x2"));
- }
- return sb.ToString();
- }
- /// <summary>
- /// 计算字符串的MD5值
- /// </summary>
- /// <param name="source">源串</param>
- /// <returns>换算后的字符串</returns>
- public static string Md5(string source)
- {
- MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
- byte[] data = Encoding.UTF8.GetBytes(source);
- byte[] md5Data = md5.ComputeHash(data, 0, data.Length);
- md5.Clear();
- string destString = "";
- for (int i = 0; i < md5Data.Length; i++)
- {
- destString += Convert.ToString(md5Data[i], 16).PadLeft(2, '0');
- }
- destString = destString.PadLeft(32, '0');
- return destString;
- }
- /// <summary>
- /// 计算文件的MD5值
- /// </summary>
- /// <param name="file">文件的绝对路径</param>
- /// <returns>md5值</returns>
- public static string Md5File(string file)
- {
- try
- {
- FileStream fs = new FileStream(file, FileMode.Open);
- MD5 md5 = new MD5CryptoServiceProvider();
- byte[] retVal = md5.ComputeHash(fs);
- fs.Close();
- StringBuilder sb = new StringBuilder();
- for (int i = 0; i < retVal.Length; i++)
- {
- sb.Append(retVal[i].ToString("x2"));
- }
- return sb.ToString();
- }
- catch (Exception ex)
- {
- throw new Exception("Md5File() fail, INFO:" + ex.Message);
- }
- }
- }
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