1 //方法一 2 //须添加对System.Web的引用 3 //using System.Web.Security; 4 /// <summary> 5 /// SHA1加密字符串 6 /// </summary> 7 /// <param name="source">源字符串</param> 8 /// <returns>加密后的字符串</returns> 9 public string SHA1(string source) 10 { 11 return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "SHA1"); 12 } 13 /// <summary> 14 /// MD5加密字符串 15 /// </summary> 16 /// <param name="source">源字符串</param> 17 /// <returns>加密后的字符串</returns> 18 public string MD5(string source) 19 { 20 return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "MD5");; 21 } 22 23 24 //方法二(可逆加密解密)： 25 //using System.Security.Cryptography; 26 public string Encode(string data) 27 { 28 byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); 29 byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); 30 DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); 31 int i = cryptoProvider.KeySize; 32 MemoryStream ms = new MemoryStream(); 33 CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write); 34 StreamWriter sw = new StreamWriter(cst); 35 sw.Write(data); 36 sw.Flush(); 37 cst.FlushFinalBlock(); 38 sw.Flush(); 39 return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length); 40 } 41 public string Decode(string data) 42 { 43 byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); 44 byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); 45 byte[] byEnc; 46 try 47 { 48 byEnc = Convert.FromBase64String(data); 49 } 50 catch 51 { 52 return null; 53 } 54 DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); 55 MemoryStream ms = new MemoryStream(byEnc); 56 CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read); 57 StreamReader sr = new StreamReader(cst); 58 59 60 //方法三(MD5不可逆)： 61 //using System.Security.Cryptography; 62 //MD5不可逆加密 63 //32位加密 64 public string GetMD5_32(string s, string _input_charset) 65 { 66 MD5 md5 = new MD5CryptoServiceProvider(); 67 byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s)); 68 StringBuilder sb = new StringBuilder(32); 69 for (int i = 0; i < t.Length; i++) 70 { 71 sb.Append(t[i].ToString("x").PadLeft(2, '0')); 72 } 73 return sb.ToString(); 74 } 75 //16位加密 76 public static string GetMd5_16(string ConvertString) 77 { 78 MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); 79 string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8); 80 t2 = t2.Replace("-", ""); 81 return t2; 82 } 83 84 85 //方法四(对称加密)： 86 //using System.IO; 87 //using System.Security.Cryptography; 88 private SymmetricAlgorithm mobjCryptoService; 89 private string Key; 90 /// <summary> 91 /// 对称加密类的构造函数 92 /// </summary> 93 public SymmetricMethod() 94 { 95 mobjCryptoService = new RijndaelManaged(); 96 Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7"; 97 } 98 /// <summary> 99 /// 获得密钥 100 /// </summary> 101 /// <returns>密钥</returns> 102 private byte[] GetLegalKey() 103 { 104 string sTemp = Key; 105 mobjCryptoService.GenerateKey(); 106 byte[] bytTemp = mobjCryptoService.Key; 107 int KeyLength = bytTemp.Length; 108 if (sTemp.Length > KeyLength) 109 sTemp = sTemp.Substring(0, KeyLength); 110 else if (sTemp.Length < KeyLength) 111 sTemp = sTemp.PadRight(KeyLength, ' '); 112 return ASCIIEncoding.ASCII.GetBytes(sTemp); 113 } 114 /// <summary> 115 /// 获得初始向量IV 116 /// </summary> 117 /// <returns>初试向量IV</returns> 118 private byte[] GetLegalIV() 119 { 120 string sTemp = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk"; 121 mobjCryptoService.GenerateIV(); 122 byte[] bytTemp = mobjCryptoService.IV; 123 int IVLength = bytTemp.Length; 124 if (sTemp.Length > IVLength) 125 sTemp = sTemp.Substring(0, IVLength); 126 else if (sTemp.Length < IVLength) 127 sTemp = sTemp.PadRight(IVLength, ' '); 128 return ASCIIEncoding.ASCII.GetBytes(sTemp); 129 } 130 /// <summary> 131 /// 加密方法 132 /// </summary> 133 /// <param name="Source">待加密的串</param> 134 /// <returns>经过加密的串</returns> 135 public string Encrypto(string Source) 136 { 137 byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source); 138 MemoryStream ms = new MemoryStream(); 139 mobjCryptoService.Key = GetLegalKey(); 140 mobjCryptoService.IV = GetLegalIV(); 141 ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor(); 142 CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write); 143 cs.Write(bytIn, 0, bytIn.Length); 144 cs.FlushFinalBlock(); 145 ms.Close(); 146 byte[] bytOut = ms.ToArray(); 147 return Convert.ToBase64String(bytOut); 148 } 149 /// <summary> 150 /// 解密方法 151 /// </summary> 152 /// <param name="Source">待解密的串</param> 153 /// <returns>经过解密的串</returns> 154 public string Decrypto(string Source) 155 { 156 byte[] bytIn = Convert.FromBase64String(Source); 157 MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length); 158 mobjCryptoService.Key = GetLegalKey(); 159 mobjCryptoService.IV = GetLegalIV(); 160 ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor(); 161 CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read); 162 StreamReader sr = new StreamReader(cs); 163 return sr.ReadToEnd(); 164 } 165 166 //方法五： 167 //using System.IO; 168 //using System.Security.Cryptography; 169 //using System.Text; 170 //默认密钥向量 171 private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; 172 /**//**//**//// <summary> 173 /// DES加密字符串 keleyi.com 174 /// </summary> 175 /// <param name="encryptString">待加密的字符串</param> 176 /// <param name="encryptKey">加密密钥,要求为8位</param> 177 /// <returns>加密成功返回加密后的字符串，失败返回源串</returns> 178 public static string EncryptDES(string encryptString, string encryptKey) 179 { 180 try 181 { 182 byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8)); 183 byte[] rgbIV = Keys; 184 byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString); 185 DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider(); 186 MemoryStream mStream = new MemoryStream(); 187 CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); 188 cStream.Write(inputByteArray, 0, inputByteArray.Length); 189 cStream.FlushFinalBlock(); 190 return Convert.ToBase64String(mStream.ToArray()); 191 } 192 catch 193 { 194 return encryptString; 195 } 196 } 197 /**//**//**//// <summary> 198 /// DES解密字符串 keleyi.com 199 /// </summary> 200 /// <param name="decryptString">待解密的字符串</param> 201 /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param> 202 /// <returns>解密成功返回解密后的字符串，失败返源串</returns> 203 public static string DecryptDES(string decryptString, string decryptKey) 204 { 205 try 206 { 207 byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey); 208 byte[] rgbIV = Keys; 209 byte[] inputByteArray = Convert.FromBase64String(decryptString); 210 DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider(); 211 MemoryStream mStream = new MemoryStream(); 212 CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); 213 cStream.Write(inputByteArray, 0, inputByteArray.Length); 214 cStream.FlushFinalBlock(); 215 return Encoding.UTF8.GetString(mStream.ToArray()); 216 } 217 catch 218 { 219 return decryptString; 220 } 221 } 222 223 224 //方法六(文件加密)： 225 //using System.IO; 226 //using System.Security.Cryptography; 227 //using System.Text; 228 //加密文件 229 private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV) 230 { 231 //Create the file streams to handle the input and output files. 232 FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); 233 FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); 234 fout.SetLength(0); 235 //Create variables to help with read and write. 236 byte[] bin = new byte[100]; //This is intermediate storage for the encryption. 237 long rdlen = 0; //This is the total number of bytes written. 238 long totlen = fin.Length; //This is the total length of the input file. 239 int len; //This is the number of bytes to be written at a time. 240 DES des = new DESCryptoServiceProvider(); 241 CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write); 242 //Read from the input file, then encrypt and write to the output file. 243 while (rdlen < totlen) 244 { 245 len = fin.Read(bin, 0, 100); 246 encStream.Write(bin, 0, len); 247 rdlen = rdlen + len; 248 } 249 encStream.Close(); 250 fout.Close(); 251 fin.Close(); 252 } 253 //解密文件 254 private static void DecryptData(String inName, String outName, byte[] desKey, byte[] desIV) 255 { 256 //Create the file streams to handle the input and output files. 257 FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); 258 FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); 259 fout.SetLength(0); 260 //Create variables to help with read and write. 261 byte[] bin = new byte[100]; //This is intermediate storage for the encryption. 262 long rdlen = 0; //This is the total number of bytes written. 263 long totlen = fin.Length; //This is the total length of the input file. 264 int len; //This is the number of bytes to be written at a time. 265 DES des = new DESCryptoServiceProvider(); 266 CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write); 267 //Read from the input file, then encrypt and write to the output file. 268 while (rdlen < totlen) 269 { 270 len = fin.Read(bin, 0, 100); 271 encStream.Write(bin, 0, len); 272 rdlen = rdlen + len; 273 } 274 encStream.Close(); 275 fout.Close(); 276 fin.Close(); 277 return sr.ReadToEnd(); 278 }
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