方法一: |
02 |
//须添加对System.Web的引用 |
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using System.Web.Security; |
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|
05 |
... |
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|
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/// <summary> |
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/// SHA1加密字符串 |
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/// </summary> |
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/// <param name="source">源字符串</param> |
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/// <returns>加密后的字符串</returns> |
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public string SHA1( string source) |
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{ |
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return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "SHA1" ); |
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} |
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|
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|
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/// <summary> |
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/// MD5加密字符串 |
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/// </summary> |
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/// <param name="source">源字符串</param> |
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/// <returns>加密后的字符串</returns> |
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public string MD5( string source) |
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{ |
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return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "MD5" );; |
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} |
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方法二(可逆加密解密): |
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using System.Security.Cryptography; |
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|
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... |
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|
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public string Encode( string data) |
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{ |
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byte [] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); |
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byte [] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); |
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|
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DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); |
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int i = cryptoProvider.KeySize; |
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MemoryStream ms = new MemoryStream(); |
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CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write); |
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|
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StreamWriter sw = new StreamWriter(cst); |
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sw.Write(data); |
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sw.Flush(); |
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cst.FlushFinalBlock(); |
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sw.Flush(); |
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return Convert.ToBase64String(ms.GetBuffer(), 0, ( int )ms.Length); |
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|
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} |
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|
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public string Decode( string data) |
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{ |
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byte [] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64); |
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byte [] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64); |
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|
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byte [] byEnc; |
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try |
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{ |
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byEnc = Convert.FromBase64String(data); |
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} |
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catch |
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{ |
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return null ; |
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} |
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|
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DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); |
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MemoryStream ms = new MemoryStream(byEnc); |
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CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read); |
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StreamReader sr = new StreamReader(cst); |
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return sr.ReadToEnd(); |
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} |
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方法三(MD5不可逆): |
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using System.Security.Cryptography; |
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|
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... |
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|
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//MD5不可逆加密 |
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|
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//32位加密 |
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|
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public string GetMD5_32( string s, string _input_charset) |
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{ |
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MD5 md5 = new MD5CryptoServiceProvider(); |
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byte [] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s)); |
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StringBuilder sb = new StringBuilder(32); |
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for ( int i = 0; i < t.Length; i++) |
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{ |
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sb.Append(t[i].ToString( "x" ).PadLeft(2, '0' )); |
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} |
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return sb.ToString(); |
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} |
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|
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//16位加密 |
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public static string GetMd5_16( string ConvertString) |
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{ |
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MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); |
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string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8); |
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t2 = t2.Replace( "-" , "" ); |
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return t2; |
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} |
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方法四(对称加密): |
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using System.IO; |
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using System.Security.Cryptography; |
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|
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... |
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|
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private SymmetricAlgorithm mobjCryptoService; |
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private string Key; |
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/// <summary> |
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/// 对称加密类的构造函数 |
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/// </summary> |
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public SymmetricMethod() |
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{ |
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mobjCryptoService = new RijndaelManaged(); |
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Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7" ; |
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} |
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/// <summary> |
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/// 获得密钥 |
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/// </summary> |
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/// <returns>密钥</returns> |
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private byte [] GetLegalKey() |
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{ |
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string sTemp = Key; |
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mobjCryptoService.GenerateKey(); |
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byte [] bytTemp = mobjCryptoService.Key; |
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int KeyLength = bytTemp.Length; |
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if (sTemp.Length > KeyLength) |
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sTemp = sTemp.Substring(0, KeyLength); |
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else if (sTemp.Length < KeyLength) |
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sTemp = sTemp.PadRight(KeyLength, ' ' ); |
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return ASCIIEncoding.ASCII.GetBytes(sTemp); |
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} |
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/// <summary> |
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/// 获得初始向量IV |
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/// </summary> |
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/// <returns>初试向量IV</returns> |
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private byte [] GetLegalIV() |
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{ |
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string sTemp = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk" ; |
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mobjCryptoService.GenerateIV(); |
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byte [] bytTemp = mobjCryptoService.IV; |
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int IVLength = bytTemp.Length; |
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if (sTemp.Length > IVLength) |
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sTemp = sTemp.Substring(0, IVLength); |
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else if (sTemp.Length < IVLength) |
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sTemp = sTemp.PadRight(IVLength, ' ' ); |
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return ASCIIEncoding.ASCII.GetBytes(sTemp); |
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} |
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/// <summary> |
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/// 加密方法 |
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/// </summary> |
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/// <param name="Source">待加密的串</param> |
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/// <returns>经过加密的串</returns> |
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public string Encrypto( string Source) |
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{ |
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byte [] bytIn = UTF8Encoding.UTF8.GetBytes(Source); |
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MemoryStream ms = new MemoryStream(); |
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mobjCryptoService.Key = GetLegalKey(); |
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mobjCryptoService.IV = GetLegalIV(); |
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ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor(); |
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CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write); |
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cs.Write(bytIn, 0, bytIn.Length); |
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cs.FlushFinalBlock(); |
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ms.Close(); |
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byte [] bytOut = ms.ToArray(); |
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return Convert.ToBase64String(bytOut); |
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} |
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/// <summary> |
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/// 解密方法 |
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/// </summary> |
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/// <param name="Source">待解密的串</param> |
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/// <returns>经过解密的串</returns> |
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public string Decrypto( string Source) |
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{ |
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byte [] bytIn = Convert.FromBase64String(Source); |
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MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length); |
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mobjCryptoService.Key = GetLegalKey(); |
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mobjCryptoService.IV = GetLegalIV(); |
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ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor(); |
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CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read); |
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StreamReader sr = new StreamReader(cs); |
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return sr.ReadToEnd(); |
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} |
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方法五: |
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using System.IO; |
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using System.Security.Cryptography; |
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using System.Text; |
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|
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... |
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|
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//默认密钥向量 |
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private static byte [] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; |
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/// <summary> |
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/// DES加密字符串 |
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/// </summary> |
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/// <param name="encryptString">待加密的字符串</param> |
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/// <param name="encryptKey">加密密钥,要求为8位</param> |
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/// <returns>加密成功返回加密后的字符串,失败返回源串</returns> |
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public static string EncryptDES( string encryptString, string encryptKey) |
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{ |
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try |
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{ |
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byte [] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8)); |
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byte [] rgbIV = Keys; |
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byte [] inputByteArray = Encoding.UTF8.GetBytes(encryptString); |
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DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider(); |
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MemoryStream mStream = new MemoryStream(); |
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CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); |
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cStream.Write(inputByteArray, 0, inputByteArray.Length); |
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cStream.FlushFinalBlock(); |
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return Convert.ToBase64String(mStream.ToArray()); |
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} |
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catch |
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{ |
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return encryptString; |
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} |
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} |
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|
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/// <summary> |
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/// DES解密字符串 |
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/// </summary> |
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/// <param name="decryptString">待解密的字符串</param> |
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/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param> |
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/// <returns>解密成功返回解密后的字符串,失败返源串</returns> |
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public static string DecryptDES( string decryptString, string decryptKey) |
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{ |
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try |
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{ |
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byte [] rgbKey = Encoding.UTF8.GetBytes(decryptKey); |
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byte [] rgbIV = Keys; |
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byte [] inputByteArray = Convert.FromBase64String(decryptString); |
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DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider(); |
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MemoryStream mStream = new MemoryStream(); |
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CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); |
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cStream.Write(inputByteArray, 0, inputByteArray.Length); |
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cStream.FlushFinalBlock(); |
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return Encoding.UTF8.GetString(mStream.ToArray()); |
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} |
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catch |
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{ |
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return decryptString; |
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} |
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} |
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方法六(文件加密): |
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using System.IO; |
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using System.Security.Cryptography; |
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using System.Text; |
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|
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... |
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|
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//加密文件 |
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private static void EncryptData(String inName, String outName, byte [] desKey, byte [] desIV) |
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{ |
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//Create the file streams to handle the input and output files. |
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FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); |
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FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); |
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fout.SetLength(0); |
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|
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//Create variables to help with read and write. |
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byte [] bin = new byte [100]; //This is intermediate storage for the encryption. |
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long rdlen = 0; //This is the total number of bytes written. |
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long totlen = fin.Length; //This is the total length of the input file. |
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int len; //This is the number of bytes to be written at a time. |
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|
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DES des = new DESCryptoServiceProvider(); |
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CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write); |
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|
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//Read from the input file, then encrypt and write to the output file. |
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while (rdlen < totlen) |
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{ |
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len = fin.Read(bin, 0, 100); |
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encStream.Write(bin, 0, len); |
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rdlen = rdlen + len; |
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} |
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|
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encStream.Close(); |
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fout.Close(); |
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fin.Close(); |
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} |
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|
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//解密文件 |
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private static void DecryptData(String inName, String outName, byte [] desKey, byte [] desIV) |
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{ |
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//Create the file streams to handle the input and output files. |
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FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read); |
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FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write); |
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fout.SetLength(0); |
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|
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//Create variables to help with read and write. |
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byte [] bin = new byte [100]; //This is intermediate storage for the encryption. |
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long rdlen = 0; //This is the total number of bytes written. |
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long totlen = fin.Length; //This is the total length of the input file. |
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int len; //This is the number of bytes to be written at a time. |
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|
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DES des = new DESCryptoServiceProvider(); |
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CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write); |
54 |
|
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//Read from the input file, then encrypt and write to the output file. |
56 |
while (rdlen < totlen) |
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{ |
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len = fin.Read(bin, 0, 100); |
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encStream.Write(bin, 0, len); |
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rdlen = rdlen + len; |
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} |
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|
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encStream.Close(); |
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fout.Close(); |
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fin.Close(); |
66 |
|
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} |
01 |
using System; |
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using System.Security.Cryptography; //这个是处理文字编码的前提 |
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using System.Text; |
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using System.IO; |
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/// <summary> |
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/// DES加密方法 |
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/// </summary> |
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/// <param name="strPlain">明文</param> |
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/// <param name="strDESKey">密钥</param> |
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/// <param name="strDESIV">向量</param> |
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/// <returns>密文</returns> |
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public string DESEncrypt( string strPlain, string strDESKey, string strDESIV) |
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{ |
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//把密钥转换成字节数组 |
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byte [] bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey); |
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//把向量转换成字节数组 |
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byte [] bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV); |
18 |
//声明1个新的DES对象 |
19 |
DESCryptoServiceProvider desEncrypt= new DESCryptoServiceProvider(); |
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//开辟一块内存流 |
21 |
MemoryStream msEncrypt= new MemoryStream(); |
22 |
//把内存流对象包装成加密流对象 |
23 |
CryptoStream csEncrypt= new CryptoStream(msEncrypt,desEncrypt.CreateEncryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Write); |
24 |
//把加密流对象包装成写入流对象 |
25 |
StreamWriter swEncrypt= new StreamWriter(csEncrypt); |
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//写入流对象写入明文 |
27 |
swEncrypt.WriteLine(strPlain); |
28 |
//写入流关闭 |
29 |
swEncrypt.Close(); |
30 |
//加密流关闭 |
31 |
csEncrypt.Close(); |
32 |
//把内存流转换成字节数组,内存流现在已经是密文了 |
33 |
byte [] bytesCipher=msEncrypt.ToArray(); |
34 |
//内存流关闭 |
35 |
msEncrypt.Close(); |
36 |
//把密文字节数组转换为字符串,并返回 |
37 |
return UnicodeEncoding.Unicode.GetString(bytesCipher); |
38 |
} |
39 |
|
40 |
|
41 |
|
42 |
|
43 |
/// <summary> |
44 |
/// DES解密方法 |
45 |
/// </summary> |
46 |
/// <param name="strCipher">密文</param> |
47 |
/// <param name="strDESKey">密钥</param> |
48 |
/// <param name="strDESIV">向量</param> |
49 |
/// <returns>明文</returns> |
50 |
public string DESDecrypt( string strCipher, string strDESKey, string strDESIV) |
51 |
{ |
52 |
//把密钥转换成字节数组 |
53 |
byte [] bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey); |
54 |
//把向量转换成字节数组 |
55 |
byte [] bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV); |
56 |
//把密文转换成字节数组 |
57 |
byte [] bytesCipher=UnicodeEncoding.Unicode.GetBytes(strCipher); |
58 |
//声明1个新的DES对象 |
59 |
DESCryptoServiceProvider desDecrypt= new DESCryptoServiceProvider(); |
60 |
//开辟一块内存流,并存放密文字节数组 |
61 |
MemoryStream msDecrypt= new MemoryStream(bytesCipher); |
62 |
//把内存流对象包装成解密流对象 |
63 |
CryptoStream csDecrypt= new CryptoStream(msDecrypt,desDecrypt.CreateDecryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Read); |
64 |
//把解密流对象包装成读出流对象 |
65 |
StreamReader srDecrypt= new StreamReader(csDecrypt); |
66 |
//明文=读出流的读出内容 |
67 |
string strPlainText=srDecrypt.ReadLine(); |
68 |
//读出流关闭 |
69 |
srDecrypt.Close(); |
70 |
//解密流关闭 |
71 |
csDecrypt.Close(); |
72 |
//内存流关闭 |
73 |
msDecrypt.Close(); |
74 |
//返回明文 |
75 |
return strPlainText; |
76 |
} |