转发:C#加密方法汇总
转自：C#加密方法汇总
方法一：
1 //须添加对System.Web的引用 2 using System.Web.Security; 3 ... 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 }
方法二(可逆加密解密)：
1 using System.Security.Cryptography; 2 ... 3 public string Encode(string data) 4 { 5 byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); 6 byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); 7 DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); 8 int i = cryptoProvider.KeySize; 9 MemoryStream ms = new MemoryStream(); 10 CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write); 11 StreamWriter sw = new StreamWriter(cst); 12 sw.Write(data); 13 sw.Flush(); 14 cst.FlushFinalBlock(); 15 sw.Flush(); 16 return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length); 17 } 18 public string Decode(string data) 19 { 20 byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); 21 byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); 22 byte[] byEnc; 23 try 24 { 25 byEnc = Convert.FromBase64String(data); 26 } 27 catch 28 { 29 return null; 30 } 31 DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); 32 MemoryStream ms = new MemoryStream(byEnc); 33 CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read); 34 StreamReader sr = new StreamReader(cst); 35 return sr.ReadToEnd(); 36 }
方法三(MD5不可逆)：
1 using System.Security.Cryptography; 2 ... 3 //MD5不可逆加密 4 //32位加密 5 public string GetMD5_32(string s, string _input_charset) 6 { 7 MD5 md5 = new MD5CryptoServiceProvider(); 8 byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s)); 9 StringBuilder sb = new StringBuilder(32); 10 for (int i = 0; i < t.Length; i++) 11 { 12 sb.Append(t[i].ToString("x").PadLeft(2, '0')); 13 } 14 return sb.ToString(); 15 } 16 //16位加密 17 public static string GetMd5_16(string ConvertString) 18 { 19 MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); 20 string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8); 21 t2 = t2.Replace("-", ""); 22 return t2; 23 }
方法四(对称加密)：
1 using System.IO; 2 using System.Security.Cryptography; 3 ... 4 private SymmetricAlgorithm mobjCryptoService; 5 private string Key; 6 /// <summary> 7 /// 对称加密类的构造函数 8 /// </summary> 9 public SymmetricMethod() 10 { 11 mobjCryptoService = new RijndaelManaged(); 12 Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7"; 13 } 14 /// <summary> 15 /// 获得密钥 16 /// </summary> 17 /// <returns>密钥</returns> 18 private byte[] GetLegalKey() 19 { 20 string sTemp = Key; 21 mobjCryptoService.GenerateKey(); 22 byte[] bytTemp = mobjCryptoService.Key; 23 int KeyLength = bytTemp.Length; 24 if (sTemp.Length > KeyLength) 25 sTemp = sTemp.Substring(0, KeyLength); 26 else if (sTemp.Length < KeyLength) 27 sTemp = sTemp.PadRight(KeyLength, ' '); 28 return ASCIIEncoding.ASCII.GetBytes(sTemp); 29 } 30 /// <summary> 31 /// 获得初始向量IV 32 /// </summary> 33 /// <returns>初试向量IV</returns> 34 private byte[] GetLegalIV() 35 { 36 string sTemp = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk"; 37 mobjCryptoService.GenerateIV(); 38 byte[] bytTemp = mobjCryptoService.IV; 39 int IVLength = bytTemp.Length; 40 if (sTemp.Length > IVLength) 41 sTemp = sTemp.Substring(0, IVLength); 42 else if (sTemp.Length < IVLength) 43 sTemp = sTemp.PadRight(IVLength, ' '); 44 return ASCIIEncoding.ASCII.GetBytes(sTemp); 45 } 46 /// <summary> 47 /// 加密方法 48 /// </summary> 49 /// <param name="Source">待加密的串</param> 50 /// <returns>经过加密的串</returns> 51 public string Encrypto(string Source) 52 { 53 byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source); 54 MemoryStream ms = new MemoryStream(); 55 mobjCryptoService.Key = GetLegalKey(); 56 mobjCryptoService.IV = GetLegalIV(); 57 ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor(); 58 CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write); 59 cs.Write(bytIn, 0, bytIn.Length); 60 cs.FlushFinalBlock(); 61 ms.Close(); 62 byte[] bytOut = ms.ToArray(); 63 return Convert.ToBase64String(bytOut); 64 } 65 /// <summary> 66 /// 解密方法 67 /// </summary> 68 /// <param name="Source">待解密的串</param> 69 /// <returns>经过解密的串</returns> 70 public string Decrypto(string Source) 71 { 72 byte[] bytIn = Convert.FromBase64String(Source); 73 MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length); 74 mobjCryptoService.Key = GetLegalKey(); 75 mobjCryptoService.IV = GetLegalIV(); 76 ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor(); 77 CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read); 78 StreamReader sr = new StreamReader(cs); 79 return sr.ReadToEnd(); 80 }
方法五：
1 using System.IO; 2 using System.Security.Cryptography; 3 using System.Text; 4 ... 5 //默认密钥向量 6 private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; 7 /**//**//**//// <summary> 8 /// DES加密字符串 9 /// </summary> 10 /// <param name="encryptString">待加密的字符串</param> 11 /// <param name="encryptKey">加密密钥,要求为8位</param> 12 /// <returns>加密成功返回加密后的字符串，失败返回源串</returns> 13 public static string EncryptDES(string encryptString, string encryptKey) 14 { 15 try 16 { 17 byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8)); 18 byte[] rgbIV = Keys; 19 byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString); 20 DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider(); 21 MemoryStream mStream = new MemoryStream(); 22 CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); 23 cStream.Write(inputByteArray, 0, inputByteArray.Length); 24 cStream.FlushFinalBlock(); 25 return Convert.ToBase64String(mStream.ToArray()); 26 } 27 catch 28 { 29 return encryptString; 30 } 31 } 32 /**//**//**//// <summary> 33 /// DES解密字符串 34 /// </summary> 35 /// <param name="decryptString">待解密的字符串</param> 36 /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param> 37 /// <returns>解密成功返回解密后的字符串，失败返源串</returns> 38 public static string DecryptDES(string decryptString, string decryptKey) 39 { 40 try 41 { 42 byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey); 43 byte[] rgbIV = Keys; 44 byte[] inputByteArray = Convert.FromBase64String(decryptString); 45 DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider(); 46 MemoryStream mStream = new MemoryStream(); 47 CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); 48 cStream.Write(inputByteArray, 0, inputByteArray.Length); 49 cStream.FlushFinalBlock(); 50 return Encoding.UTF8.GetString(mStream.ToArray()); 51 } 52 catch 53 { 54 return decryptString; 55 } 56 }
方法六(文件加密)：
1 using System.IO; 2 using System.Security.Cryptography; 3 using System.Text; 4 ... 5 //加密文件 6 private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV) 7 { 8 //Create the file streams to handle the input and output files. 9 FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); 10 FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); 11 fout.SetLength(0); 12 //Create variables to help with read and write. 13 byte[] bin = new byte[100]; //This is intermediate storage for the encryption. 14 long rdlen = 0; //This is the total number of bytes written. 15 long totlen = fin.Length; //This is the total length of the input file. 16 int len; //This is the number of bytes to be written at a time. 17 DES des = new DESCryptoServiceProvider(); 18 CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write); 19 //Read from the input file, then encrypt and write to the output file. 20 while (rdlen < totlen) 21 { 22 len = fin.Read(bin, 0, 100); 23 encStream.Write(bin, 0, len); 24 rdlen = rdlen + len; 25 } 26 encStream.Close(); 27 fout.Close(); 28 fin.Close(); 29 } 30 //解密文件 31 private static void DecryptData(String inName, String outName, byte[] desKey, byte[] desIV) 32 { 33 //Create the file streams to handle the input and output files. 34 FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); 35 FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); 36 fout.SetLength(0); 37 //Create variables to help with read and write. 38 byte[] bin = new byte[100]; //This is intermediate storage for the encryption. 39 long rdlen = 0; //This is the total number of bytes written. 40 long totlen = fin.Length; //This is the total length of the input file. 41 int len; //This is the number of bytes to be written at a time. 42 DES des = new DESCryptoServiceProvider(); 43 CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write); 44 //Read from the input file, then encrypt and write to the output file. 45 while (rdlen < totlen) 46 { 47 len = fin.Read(bin, 0, 100); 48 encStream.Write(bin, 0, len); 49 rdlen = rdlen + len; 50 } 51 encStream.Close(); 52 fout.Close(); 53 fin.Close();