117 lines
3.7 KiB
C#
117 lines
3.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text;
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using System.Threading.Tasks;
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namespace Maticsoft.DBUtility
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{
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/// <summary>
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/// DES加密/解密类。
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/// </summary>
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public class DESEncrypt
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{
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public DESEncrypt()
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{
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}
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#region ========加密========
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/// <summary>
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/// 加密
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/// </summary>
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/// <param name="Text"></param>
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/// <returns></returns>
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public static string Encrypt(string Text)
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{
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return Encrypt(Text, "litianping");
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}
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/// <summary>
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/// 加密数据
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/// </summary>
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/// <param name="Text"></param>
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/// <param name="sKey"></param>
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/// <returns></returns>
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public static string Encrypt(string Text, string sKey)
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{
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DESCryptoServiceProvider des = new DESCryptoServiceProvider();
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byte[] inputByteArray;
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inputByteArray = Encoding.Default.GetBytes(Text);
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des.Key = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).Substring(0, 8));
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des.IV = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).Substring(0, 8));
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System.IO.MemoryStream ms = new System.IO.MemoryStream();
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CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
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cs.FlushFinalBlock();
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StringBuilder ret = new StringBuilder();
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foreach (byte b in ms.ToArray())
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{
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ret.AppendFormat("{0:X2}", b);
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}
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return ret.ToString();
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}
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#endregion
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#region ========解密========
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/// <summary>
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/// 解密
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/// </summary>
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/// <param name="Text"></param>
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/// <returns></returns>
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public static string Decrypt(string Text)
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{
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return Decrypt(Text, "litianping");
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}
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/// <summary>
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/// 解密数据
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/// </summary>
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/// <param name="Text"></param>
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/// <param name="sKey"></param>
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/// <returns></returns>
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public static string Decrypt(string Text, string sKey)
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{
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DESCryptoServiceProvider des = new DESCryptoServiceProvider();
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int len;
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len = Text.Length / 2;
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byte[] inputByteArray = new byte[len];
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int x, i;
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for (x = 0; x < len; x++)
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{
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i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
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inputByteArray[x] = (byte)i;
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}
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des.Key = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).Substring(0, 8));
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des.IV = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).Substring(0, 8));
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System.IO.MemoryStream ms = new System.IO.MemoryStream();
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CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
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cs.FlushFinalBlock();
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return Encoding.Default.GetString(ms.ToArray());
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}
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/// <summary>
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/// 32位MD5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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public static string Md5Hash(string input)
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{
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MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
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byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));
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StringBuilder sBuilder = new StringBuilder();
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for (int i = 0; i < data.Length; i++)
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{
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sBuilder.Append(data[i].ToString("x2"));
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}
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return sBuilder.ToString().ToUpper();
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}
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#endregion
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}
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}
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