C#封装的DES与MD5加密示例代码

  1 using  System;
  2 using  System.IO;
  3 using  System.Text;
  4 using  System.Security.Cryptography;
  5
  6 namespace  ConsoleApplication1
  7 {
  8    public class DESEncryptor
  9    {
 10        私有成员#region 私有成员
 11        /**//// <summary>
 12        /// 输入字符串
 13        /// </summary>
 14        private string inputString=null;
 15        /**//// <summary>
 16        /// 输出字符串
 17        /// </summary>
 18        private string outString=null;
 19        /**//// <summary>
 20        /// 输入文件路径
 21        /// </summary>
 22        private string inputFilePath=null;
 23        /**//// <summary>
 24        /// 输出文件路径
 25        /// </summary>
 26        private string outFilePath=null;
 27        /**//// <summary>
 28        /// 加密密钥
 29        /// </summary>
 30        private string encryptKey=null;
 31        /**//// <summary>
 32        /// 解密密钥
 33        /// </summary>
 34        private string decryptKey=null;
 35        /**//// <summary>
 36        /// 提示信息
 37        /// </summary>
 38        private string noteMessage=null;
 39        #endregion
 40
 41        公共属性#region 公共属性
 42        /**//// <summary>
 43        /// 输入字符串
 44        /// </summary>
 45        public string InputString
 46        {
 47        get{return inputString;}
 48        set{inputString=value;}
 49        }
 50        /**//// <summary>
 51        /// 输出字符串
 52        /// </summary>
 53        public string OutString
 54        {
 55        get{return outString;}
 56        set{outString=value;}
 57        }
 58        /**//// <summary>
 59        /// 输入文件路径
 60        /// </summary>
 61        public string InputFilePath
 62        {
 63        get{return inputFilePath;}
 64        set{inputFilePath=value;}
 65        }
 66        /**//// <summary>
 67        /// 输出文件路径
 68        /// </summary>
 69        public string OutFilePath
 70        {
 71        get{return outFilePath;}
 72        set{outFilePath=value;}
 73        }
 74        /**//// <summary>
 75        /// 加密密钥
 76        /// </summary>
 77        public string EncryptKey
 78        {
 79        get{return encryptKey;}
 80        set{encryptKey=value;}
 81        }
 82        /**//// <summary>
 83        /// 解密密钥
 84        /// </summary>
 85        public string DecryptKey
 86        {
 87        get{return decryptKey;}
 88        set{decryptKey=value;}
 89        }
 90        /**//// <summary>
 91        /// 错误信息
 92        /// </summary>
 93        public string NoteMessage
 94        {
 95        get{return noteMessage;}
 96        set{noteMessage=value;}
 97        }
 98        #endregion
 99
100        构造函数#region 构造函数
101        public DESEncryptor()
102        {
103            //
104            // TODO: 在此处添加构造函数逻辑
105            //
106        }
107        #endregion
108
109        DES加密字符串#region DES加密字符串
110        /**//// <summary>
111        /// 加密字符串
112        /// 注意:密钥必须为８位
113        /// </summary>
114        /// <param name="strText">字符串</param>
115        /// <param name="encryptKey">密钥</param>
116        public void DesEncrypt()
117        {
118            byte[] byKey = null;
119            byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
120            try
121            {
122                byKey = System.Text.Encoding.UTF8.GetBytes(this.encryptKey.Substring(0, 8));
123                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
124                byte[] inputByteArray = Encoding.UTF8.GetBytes(this.inputString);
125                MemoryStream ms = new MemoryStream();
126                CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);
127                cs.Write(inputByteArray, 0, inputByteArray.Length);
128                cs.FlushFinalBlock();
129                this.outString = Convert.ToBase64String(ms.ToArray());
130            }
131            catch (System.Exception error)
132            {
133                this.noteMessage = error.Message;
134            }
135        }
136        #endregion
137
138        DES解密字符串#region DES解密字符串
139        /**//// <summary>
140        /// 解密字符串
141        /// </summary>
142        /// <param name="this.inputString">加了密的字符串</param>
143        /// <param name="decryptKey">密钥</param>
144        public void DesDecrypt()
145        {
146            byte[] byKey = null;
147            byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
148            byte[] inputByteArray = new Byte[this.inputString.Length];
149            try
150            {
151                byKey = System.Text.Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
152                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
153                inputByteArray = Convert.FromBase64String(this.inputString);
154                MemoryStream ms = new MemoryStream();
155                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
156                cs.Write(inputByteArray, 0, inputByteArray.Length);
157                cs.FlushFinalBlock();
158                System.Text.Encoding encoding = new System.Text.UTF8Encoding();
159                this.outString = encoding.GetString(ms.ToArray());
160            }
161            catch (System.Exception error)
162            {
163                this.noteMessage = error.Message;
164            }
165        }
166        #endregion
167
168        DES加密文件#region DES加密文件
169        /**//// <summary>
170        /// DES加密文件
171        /// </summary>
172        /// <param name="this.inputFilePath">源文件路径</param>
173        /// <param name="this.outFilePath">输出文件路径</param>
174        /// <param name="encryptKey">密钥</param>
175        public void FileDesEncrypt()
176        {
177            byte[] byKey = null;
178            byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
179            try
180            {
181                byKey = System.Text.Encoding.UTF8.GetBytes(this.encryptKey.Substring(0, 8));
182                FileStream fin = new FileStream(this.inputFilePath, FileMode.Open, FileAccess.Read);
183                FileStream fout = new FileStream(this.outFilePath, FileMode.OpenOrCreate, FileAccess.Write);
184                fout.SetLength(0);
185                //Create variables to help with read and write.
186                byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
187                long rdlen = 0; //This is the total number of bytes written.
188                long totlen = fin.Length; //This is the total length of the input file.
189                int len; //This is the number of bytes to be written at a time.
190                DES des = new DESCryptoServiceProvider();
191                CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);
192
193                //Read from the input file, then encrypt and write to the output file.
194                while (rdlen < totlen)
195                {
196                    len = fin.Read(bin, 0, 100);
197                    encStream.Write(bin, 0, len);
198                    rdlen = rdlen + len;
199                }
200
201                encStream.Close();
202                fout.Close();
203                fin.Close();
204            }
205            catch (System.Exception error)
206            {
207                this.noteMessage = error.Message.ToString();
208            }
209        }
210        #endregion
211
212        DES解密文件#region DES解密文件
213        /**//// <summary>
214        /// 解密文件
215        /// </summary>
216        /// <param name="this.inputFilePath">加密了的文件路径</param>
217        /// <param name="this.outFilePath">输出文件路径</param>
218        /// <param name="decryptKey">密钥</param>
219        public void FileDesDecrypt()
220        {
221            byte[] byKey = null;
222            byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
223            try
224            {
225                byKey = System.Text.Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
226                FileStream fin = new FileStream(this.inputFilePath, FileMode.Open, FileAccess.Read);
227                FileStream fout = new FileStream(this.outFilePath, FileMode.OpenOrCreate, FileAccess.Write);
228                fout.SetLength(0);
229                //Create variables to help with read and write.
230                byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
231                long rdlen = 0; //This is the total number of bytes written.
232                long totlen = fin.Length; //This is the total length of the input file.
233                int len; //This is the number of bytes to be written at a time.
234                DES des = new DESCryptoServiceProvider();
235                CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
236
237
238                //Read from the input file, then encrypt and write to the output file.
239                while (rdlen < totlen)
240                {
241                    len = fin.Read(bin, 0, 100);
242                    encStream.Write(bin, 0, len);
243                    rdlen = rdlen + len;
244                }
245
246                encStream.Close();
247                fout.Close();
248                fin.Close();
249            }
250            catch (System.Exception error)
251            {
252                this.noteMessage = error.Message.ToString();
253            }
254        }
255        #endregion
256
257        MD5#region MD5
258        /**//// <summary>
259        /// MD5 Encrypt
260        /// </summary>
261        /// <param name="strText">text</param>
262        /// <returns>md5 Encrypt string</returns>
263        public void MD5Encrypt()
264        {
265            MD5 md5 = new MD5CryptoServiceProvider();
266            byte[] result = md5.ComputeHash(System.Text.Encoding.Default.GetBytes(this.inputString));
267            this.outString = System.Text.Encoding.Default.GetString(result);
268        }
269        #endregion
270    }
271}
272