110 lines
4.2 KiB
C#
110 lines
4.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Security.Cryptography;
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using System.Text;
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namespace Appointment.Entity
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{
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public static class CryptoHelper
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{
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private static byte[] DESKeys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
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/// <summary>
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/// MD5小写加密
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/// </summary>
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/// <param name="token">加密前字符串</param>
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/// <returns></returns>
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/// <remarks>
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/// 使用了UTF8格式
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/// </remarks>
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public static string Md5(string token)
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{
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StringBuilder strHash = new StringBuilder();
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System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
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byte[] bytHash;
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bytHash = md5.ComputeHash(Encoding.UTF8.GetBytes(token));
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md5.Clear();
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for (int i = 0; i < bytHash.Length; i++)
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{
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strHash.Append(bytHash[i].ToString("x").PadLeft(2, '0'));
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}
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return strHash.ToString();
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}
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/// <summary>
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/// MD5大写加密
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/// </summary>
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/// <param name="input"></param>
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/// <returns></returns>
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/// <remarks>
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/// 字符串转为ASCII再加密
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/// 与前面方法Md5()的区别是汉字加密后的结构不一致，
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/// </remarks>
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public static string Md5Hash(string input)
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{
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string strResult;
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using (var md51 = System.Security.Cryptography.MD5.Create())
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{
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var result = md51.ComputeHash(Encoding.ASCII.GetBytes(input));
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strResult = BitConverter.ToString(result);
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strResult = strResult.Replace("-", "");
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}
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return strResult;
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}
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/// <summary>
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/// DES加密字符串
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/// </summary>
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/// <param name="encryptString">待加密的字符串</param>
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/// <param name="encryptKey">加密密钥,要求为8位</param>
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/// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
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public static string DES_Encode(string encryptString, string encryptKey = "dlhisapi")
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{
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encryptKey = encryptKey.Substring(0, 8);
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encryptKey = encryptKey.PadRight(8, ' ');
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byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
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byte[] rgbIV = DESKeys;
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byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
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DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
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MemoryStream mStream = new MemoryStream();
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CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
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cStream.Write(inputByteArray, 0, inputByteArray.Length);
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cStream.FlushFinalBlock();
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return Convert.ToBase64String(mStream.ToArray());
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}
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/// <summary>
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/// DES解密字符串
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/// </summary>
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/// <param name="decryptString">待解密的字符串</param>
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/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
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/// <returns>解密成功返回解密后的字符串,失败返源串</returns>
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public static string DES_Decode(string decryptString, string decryptKey = "dlhisapi")
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{
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try
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{
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decryptKey = decryptKey.Substring(0, 8);
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decryptKey = decryptKey.PadRight(8, ' ');
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byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
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byte[] rgbIV = DESKeys;
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byte[] inputByteArray = Convert.FromBase64String(decryptString);
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DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
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MemoryStream mStream = new MemoryStream();
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CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
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cStream.Write(inputByteArray, 0, inputByteArray.Length);
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cStream.FlushFinalBlock();
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return Encoding.UTF8.GetString(mStream.ToArray());
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}
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catch
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{
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return "";
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}
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}
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}
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}
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