方法一:
- //须添加对System.Web的引用
- using System.Web.Security;
- ...
- /// <summary>
- /// SHA1加密字符串
- /// </summary>
- /// <param name="source">源字符串</param>
- /// <returns>加密后的字符串</returns>
- public string SHA1(string source)
- {
- return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "SHA1");
- }
- /// <summary>
- /// MD5加密字符串
- /// </summary>
- /// <param name="source">源字符串</param>
- /// <returns>加密后的字符串</returns>
- public string MD5(string source)
- {
- return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "MD5");;
- }
方法二(可逆加密解密):
- using System.Security.Cryptography;
- ...
- public string Encode(string data)
- {
- byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
- byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
- DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
- int i = cryptoProvider.KeySize;
- MemoryStream ms = new MemoryStream();
- CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);
- StreamWriter sw = new StreamWriter(cst);
- sw.Write(data);
- sw.Flush();
- cst.FlushFinalBlock();
- sw.Flush();
- return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
- }
- public string Decode(string data)
- {
- byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
- byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
- byte[] byEnc;
- try
- {
- byEnc = Convert.FromBase64String(data);
- }
- catch
- {
- return null;
- }
- DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
- MemoryStream ms = new MemoryStream(byEnc);
- CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);
- StreamReader sr = new StreamReader(cst);
- return sr.ReadToEnd();
- }
方法三(MD5不可逆):
- using System.Security.Cryptography;
- ...
- //MD5不可逆加密
- //32位加密
- public string GetMD5_32(string s, string _input_charset)
- {
- MD5 md5 = new MD5CryptoServiceProvider();
- byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
- StringBuilder sb = new StringBuilder(32);
- for (int i = 0; i < t.Length; i++)
- {
- sb.Append(t[i].ToString("x").PadLeft(2, '0'));
- }
- return sb.ToString();
- }
- //16位加密
- public static string GetMd5_16(string ConvertString)
- {
- MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
- string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);
- t2 = t2.Replace("-", "");
- return t2;
- }
方法四(对称加密):
- using System.IO;
- using System.Security.Cryptography;
- ...
- private SymmetricAlgorithm mobjCryptoService;
- private string Key;
- /// <summary>
- /// 对称加密类的构造函数
- /// </summary>
- public SymmetricMethod()
- {
- mobjCryptoService = new RijndaelManaged();
- Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7";
- }
- /// <summary>
- /// 获得密钥
- /// </summary>
- /// <returns>密钥</returns>
- private byte[] GetLegalKey()
- {
- string sTemp = Key;
- mobjCryptoService.GenerateKey();
- byte[] bytTemp = mobjCryptoService.Key;
- int KeyLength = bytTemp.Length;
- if (sTemp.Length > KeyLength)
- sTemp = sTemp.Substring(0, KeyLength);
- else if (sTemp.Length < KeyLength)
- sTemp = sTemp.PadRight(KeyLength, ' ');
- return ASCIIEncoding.ASCII.GetBytes(sTemp);
- }
- /// <summary>
- /// 获得初始向量IV
- /// </summary>
- /// <returns>初试向量IV</returns>
- private byte[] GetLegalIV()
- {
- string sTemp = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk";
- mobjCryptoService.GenerateIV();
- byte[] bytTemp = mobjCryptoService.IV;
- int IVLength = bytTemp.Length;
- if (sTemp.Length > IVLength)
- sTemp = sTemp.Substring(0, IVLength);
- else if (sTemp.Length < IVLength)
- sTemp = sTemp.PadRight(IVLength, ' ');
- return ASCIIEncoding.ASCII.GetBytes(sTemp);
- }
- /// <summary>
- /// 加密方法
- /// </summary>
- /// <param name="Source">待加密的串</param>
- /// <returns>经过加密的串</returns>
- public string Encrypto(string Source)
- {
- byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source);
- MemoryStream ms = new MemoryStream();
- mobjCryptoService.Key = GetLegalKey();
- mobjCryptoService.IV = GetLegalIV();
- ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();
- CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
- cs.Write(bytIn, 0, bytIn.Length);
- cs.FlushFinalBlock();
- ms.Close();
- byte[] bytOut = ms.ToArray();
- return Convert.ToBase64String(bytOut);
- }
- /// <summary>
- /// 解密方法
- /// </summary>
- /// <param name="Source">待解密的串</param>
- /// <returns>经过解密的串</returns>
- public string Decrypto(string Source)
- {
- byte[] bytIn = Convert.FromBase64String(Source);
- MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length);
- mobjCryptoService.Key = GetLegalKey();
- mobjCryptoService.IV = GetLegalIV();
- ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();
- CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);
- StreamReader sr = new StreamReader(cs);
- return sr.ReadToEnd();
- }
方法五:
- using System.IO;
- using System.Security.Cryptography;
- using System.Text;
- ...
- //默认密钥向量
- private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
- /**//**//**//// <summary>
- /// DES加密字符串
- /// </summary>
- /// <param name="encryptString">待加密的字符串</param>
- /// <param name="encryptKey">加密密钥,要求为8位</param>
- /// <returns>加密成功返回加密后的字符串,失败返回源串</returns>
- public static string EncryptDES(string encryptString, string encryptKey)
- {
- try
- {
- byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
- byte[] rgbIV = Keys;
- byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
- DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
- MemoryStream mStream = new MemoryStream();
- CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
- cStream.Write(inputByteArray, 0, inputByteArray.Length);
- cStream.FlushFinalBlock();
- return Convert.ToBase64String(mStream.ToArray());
- }
- catch
- {
- return encryptString;
- }
- }
- /**//**//**//// <summary>
- /// DES解密字符串
- /// </summary>
- /// <param name="decryptString">待解密的字符串</param>
- /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
- /// <returns>解密成功返回解密后的字符串,失败返源串</returns>
- public static string DecryptDES(string decryptString, string decryptKey)
- {
- try
- {
- byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
- byte[] rgbIV = Keys;
- byte[] inputByteArray = Convert.FromBase64String(decryptString);
- DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
- MemoryStream mStream = new MemoryStream();
- CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
- cStream.Write(inputByteArray, 0, inputByteArray.Length);
- cStream.FlushFinalBlock();
- return Encoding.UTF8.GetString(mStream.ToArray());
- }
- catch
- {
- return decryptString;
- }
- }
方法六(文件加密):
- using System.IO;
- using System.Security.Cryptography;
- using System.Text;
- ...
- //加密文件
- private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV)
- {
- //Create the file streams to handle the input and output files.
- FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
- FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
- fout.SetLength(0);
- //Create variables to help with read and write.
- byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
- long rdlen = 0; //This is the total number of bytes written.
- long totlen = fin.Length; //This is the total length of the input file.
- int len; //This is the number of bytes to be written at a time.
- DES des = new DESCryptoServiceProvider();
- CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write);
- //Read from the input file, then encrypt and write to the output file.
- while (rdlen < totlen)
- {
- len = fin.Read(bin, 0, 100);
- encStream.Write(bin, 0, len);
- rdlen = rdlen + len;
- }
- encStream.Close();
- fout.Close();
- fin.Close();
- }
- //解密文件
- private static void DecryptData(String inName, String outName, byte[] desKey, byte[] desIV)
- {
- //Create the file streams to handle the input and output files.
- FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);
- FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
- fout.SetLength(0);
- //Create variables to help with read and write.
- byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
- long rdlen = 0; //This is the total number of bytes written.
- long totlen = fin.Length; //This is the total length of the input file.
- int len; //This is the number of bytes to be written at a time.
- DES des = new DESCryptoServiceProvider();
- CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write);
- //Read from the input file, then encrypt and write to the output file.
- while (rdlen < totlen)
- {
- len = fin.Read(bin, 0, 100);
- encStream.Write(bin, 0, len);
- rdlen = rdlen + len;
- }
- encStream.Close();
- fout.Close();
- fin.Close();