3DES加密工具类

  1using System;
  2using System.Collections.Generic;
  3using System.Text;
  4using System.Security.Cryptography;
  5using System.IO;
  6using System.Runtime.Serialization.Formatters.Binary;
  7using System.Data;
  8using System.Data.SqlClient;
  9
 10 public class Tool
 11    {
 12        static string _EmailKey = "&MJEmail";
 13
 14        /**//// <summary>
 15        /// 密钥
 16        /// </summary>
 17        public static string EmailKey
 18        {
 19            get { return Tool._EmailKey; }
 20        }
 21
 22        /**//// <summary>
 23        /// 解密方法（前两位用*代替）
 24        /// </summary>
 25        /// <param name="pToDecrypt">待解密的字符</param>
 26        /// <param name="sKey">密钥</param>
 27        /// <returns>解密后的字符</returns>
 28        public static string DESDeCode(string pToDecrypt, string sKey)
 29        {
 30            try
 31            {
 32                if (string.IsNullOrEmpty(pToDecrypt))
 33                    return null;
 34                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
 35                byte[] inputByteArray = Convert.FromBase64String(pToDecrypt);
 36                des.Key = Encoding.ASCII.GetBytes(sKey);
 37                des.IV = Encoding.ASCII.GetBytes(sKey);
 38                MemoryStream ms = new MemoryStream();
 39                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
 40                cs.Write(inputByteArray, 0, inputByteArray.Length);
 41                cs.FlushFinalBlock();
 42                StringBuilder ret = new StringBuilder();
 43                if (Encoding.UTF8.GetString(ms.ToArray()).Length >= 2)
 44                {
 45                    string newstr = Encoding.Default.GetString(ms.ToArray());
 46                    return "**" + newstr.Substring(2);
 47                }
 48                else { return "**"; }
 49            }
 50            catch
 51            {
 52                if (pToDecrypt.Length >= 2)
 53                {
 54                    return "**" + pToDecrypt.Substring(2);
 55                }
 56                else
 57                    return "**";
 58            }
 59        }
 60
 61        /**//// <summary>
 62        /// 加密方法
 63        /// </summary>
 64        /// <param name="pToEncrypt">待加密字符</param>
 65        /// <param name="sKey">密钥</param>
 66        /// <returns>加密后的字符</returns>
 67        public static string DESEnCode(string pToEncrypt, string sKey)
 68        {
 69            if (string.IsNullOrEmpty(pToEncrypt))
 70                return null;
 71            pToEncrypt = pToEncrypt.ToLower();
 72            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
 73            byte[] inputByteArray = Encoding.UTF8.GetBytes(pToEncrypt);
 74            des.Key = Encoding.ASCII.GetBytes(sKey);
 75            des.IV = Encoding.ASCII.GetBytes(sKey);
 76            MemoryStream ms = new MemoryStream();
 77            CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
 78            cs.Write(inputByteArray, 0, inputByteArray.Length);
 79            cs.FlushFinalBlock();
 80            return Convert.ToBase64String(ms.ToArray());
 81        }
 82
 83
 84
 85        /**//// <summary>
 86        /// 解密datatable中的指定列数据，并将这些列的前两位字母换成**
 87        /// </summary>
 88        /// <param name="cnames">要解密的列题标</param>
 89        /// <param name="dt">待处理的datable</param>
 90        public static DataTable DESDeDataTble(IList<string> cnames, DataTable dt)
 91        {
 92            if (dt == null || dt.Rows.Count == 0 || cnames == null || cnames.Count == 0)
 93                return dt;
 94            for (int i = 0; i < dt.Rows.Count; i++)
 95            {
 96                for (int j = 0; j < cnames.Count; j++)
 97                {
 98                    if (dt.Columns.Contains(cnames[j].Trim()) && !string.IsNullOrEmpty(dt.Rows[i][cnames[j].Trim()].ToString()))
 99                    {
100                        string str = dt.Rows[i][cnames[j].Trim()].ToString();
101                        if (!string.IsNullOrEmpty(str))
102                        {
103                            string newstr = DESDeCode(str, EmailKey);//解密
104                            dt.Rows[i][cnames[j]] = newstr;
105                        }
106
107                    }
108                }
109            }
110            return dt;
111        }
112
113
114        /**//// <summary>
115        /// 解密dataset中的datable的指定列数据，并将这些列的前两位字母换成**
116        /// </summary>
117        /// <param name="cnames">要解密的列标题</param>
118        /// <param name="ds">待处理的dataset</param>
119        /// <returns>处理后的dataset</returns>
120        public static DataSet DESDeDataSet(IList<string> cnames, DataSet ds)
121        {
122            if (ds == null || ds.Tables.Count == 0 || cnames == null || cnames.Count == 0)
123                return ds;
124            DataSet newds = new DataSet();
125            for (int i = 0; i < ds.Tables.Count; i++)
126            {
127                DataTable dt = ds.Tables[i];
128                DataTable newdt = Tool.DESDeDataTble(cnames, dt);
129                newds.Merge(newdt);
130            }
131            return newds;
132        }
133
134        /**//// <summary>
135        /// 解密方法
136        /// </summary>
137        /// <param name="pToEncrypt">需要解密的字符</param>
138        /// <param name="sKey">密钥</param>
139        /// <returns>解密后的字符</returns>
140        public static string DESDeString(string pToDecrypt, string sKey)
141        {
142            if (string.IsNullOrEmpty(pToDecrypt))
143                return null;
144            try
145            {
146                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
147                byte[] inputByteArray = Convert.FromBase64String(pToDecrypt);
148                des.Key = Encoding.ASCII.GetBytes(sKey);
149                des.IV = Encoding.ASCII.GetBytes(sKey);
150                MemoryStream ms = new MemoryStream();
151                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
152                cs.Write(inputByteArray, 0, inputByteArray.Length);
153                cs.FlushFinalBlock();
154                return Encoding.UTF8.GetString(ms.ToArray());
155            }
156            catch
157            {
158                return pToDecrypt;
159            }
160        }
161
162
163
164        /**//// <summary>
165        /// 解密datatable中的指定列数据
166        /// </summary>
167        /// <param name="cnames">要解密的列题标</param>
168        /// <param name="dt">待处理的datable</param>
169        public static DataTable DESDeDataTbleCRM(IList<string> cnames, DataTable dt)
170        {
171            if (dt == null || dt.Rows.Count == 0 || cnames == null || cnames.Count == 0)
172                return dt;
173
174            for (int i = 0; i < dt.Rows.Count; i++)
175            {
176                for (int j = 0; j < cnames.Count; j++)
177                {
178                    if (dt.Columns.Contains(cnames[j].Trim()) && !string.IsNullOrEmpty(dt.Rows[i][cnames[j].Trim()].ToString()))
179                    {
180                        string str = dt.Rows[i][cnames[j].Trim()].ToString();
181                        if (!string.IsNullOrEmpty(str))
182                        {
183                            try
184                            {
185                                string newstr = Tool.DESDeString(str, EmailKey);//解密
186                                dt.Rows[i][cnames[j]] = newstr;
187                            }
188                            catch
189                            {
190                                continue;
191                            }
192                        }
193                    }
194                }
195            }
196            return dt;
197        }
198
199
200
201
202
203        /**//// <summary>
204        /// 解密dataset中的datable的指定列数据
205        /// </summary>
206        /// <param name="cnames">要解密的列标题</param>
207        /// <param name="ds">待处理的dataset</param>
208        /// <returns>处理后的dataset</returns>
209        public static DataSet DESDeDataSetCRM(IList<string> cnames, DataSet ds)
210        {
211            if (ds == null || ds.Tables.Count == 0 || cnames == null || cnames.Count == 0)
212                return ds;
213            DataSet newds = new DataSet();
214            for (int i = 0; i < ds.Tables.Count; i++)
215            {
216                DataTable dt = ds.Tables[i];
217                DataTable newdt = Tool.DESDeDataTbleCRM(cnames, dt);
218                newds.Merge(newdt);
219            }
220            return newds;
221        }
222        /**//// <summary>
223        /// md5加密
224        /// </summary>
225        /// <param name="value"></param>
226        /// <param name="key"></param>
227        /// <returns></returns>
228        public  static string EncodePassword(string value, string key)
229        {
230            byte[] hashbyte = new MD5CryptoServiceProvider().ComputeHash(Encoding.ASCII.GetBytes(key + value));
231            string newstr = "";
232            for (int i = 0; i < hashbyte.Length; i++)
233                newstr += hashbyte[i].ToString("X").PadLeft(2, '0');
234            return newstr.ToLower();
235        }
236
237    }