C#加密算法汇总

方法一： 02    //须添加对System.Web的引用  03    using System.Web.Security;  04       05    ...  06       07    /// <summary>  08    /// SHA1加密字符串  09    /// </summary>  10    /// <param name="source">源字符串</param>  11    /// <returns>加密后的字符串</returns>  12    public string SHA1(string source)  13    {  14        return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "SHA1");  15    }  16   17   18    /// <summary>  19    /// MD5加密字符串  20    /// </summary>  21    /// <param name="source">源字符串</param>  22    /// <returns>加密后的字符串</returns>  23    public string MD5(string source)  24    {  25        return FormsAuthentication.HashPasswordForStoringInConfigFile(source, "MD5");;  26    }

 

view source print ? 01方法二(可逆加密解密)： 02    using System.Security.Cryptography;  03       04    ...  05       06    public string Encode(string data)  07    {  08        byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);  09        byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);  10       11        DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();  12        int i = cryptoProvider.KeySize;  13        MemoryStream ms = new MemoryStream();  14        CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);  15       16        StreamWriter sw = new StreamWriter(cst);  17        sw.Write(data);  18        sw.Flush();  19        cst.FlushFinalBlock();  20        sw.Flush();  21        return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);  22       23    }  24       25    public string Decode(string data)  26    {  27        byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);  28        byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);  29       30        byte[] byEnc;  31        try  32        {  33            byEnc = Convert.FromBase64String(data);  34        }  35        catch  36        {  37            return null;  38        }  39       40        DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();  41        MemoryStream ms = new MemoryStream(byEnc);  42        CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);  43        StreamReader sr = new StreamReader(cst);  44        return sr.ReadToEnd();  45    } view source print ? 01方法三(MD5不可逆)： 02    using System.Security.Cryptography;  03       04    ...  05       06    //MD5不可逆加密  07       08    //32位加密  09       10    public string GetMD5_32(string s, string _input_charset)  11    {  12        MD5 md5 = new MD5CryptoServiceProvider();  13        byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));  14        StringBuilder sb = new StringBuilder(32);  15        for (int i = 0; i < t.Length; i++)  16        {  17            sb.Append(t[i].ToString("x").PadLeft(2, '0'));  18        }  19        return sb.ToString();  20    }  21       22    //16位加密  23    public static string GetMd5_16(string ConvertString)  24    {  25        MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();  26        string t2 = BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)), 4, 8);  27        t2 = t2.Replace("-", "");  28        return t2;  29    } view source print ? 01方法四(对称加密)： 02    using System.IO;  03    using System.Security.Cryptography;  04       05    ...  06       07    private SymmetricAlgorithm mobjCryptoService;  08    private string Key;  09    /// <summary>     10    /// 对称加密类的构造函数     11    /// </summary>     12    public SymmetricMethod()  13    {  14        mobjCryptoService = new RijndaelManaged();  15        Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7";  16    }  17    /// <summary>     18    /// 获得密钥     19    /// </summary>     20    /// <returns>密钥</returns>     21    private byte[] GetLegalKey()  22    {  23        string sTemp = Key;  24        mobjCryptoService.GenerateKey();  25        byte[] bytTemp = mobjCryptoService.Key;  26        int KeyLength = bytTemp.Length;  27        if (sTemp.Length > KeyLength)  28            sTemp = sTemp.Substring(0, KeyLength);  29        else if (sTemp.Length < KeyLength)  30            sTemp = sTemp.PadRight(KeyLength, ' ');  31        return ASCIIEncoding.ASCII.GetBytes(sTemp);  32    }  33    /// <summary>     34    /// 获得初始向量IV     35    /// </summary>     36    /// <returns>初试向量IV</returns>     37    private byte[] GetLegalIV()  38    {  39        string sTemp = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk";  40        mobjCryptoService.GenerateIV();  41        byte[] bytTemp = mobjCryptoService.IV;  42        int IVLength = bytTemp.Length;  43        if (sTemp.Length > IVLength)  44            sTemp = sTemp.Substring(0, IVLength);  45        else if (sTemp.Length < IVLength)  46            sTemp = sTemp.PadRight(IVLength, ' ');  47        return ASCIIEncoding.ASCII.GetBytes(sTemp);  48    }  49    /// <summary>     50    /// 加密方法     51    /// </summary>     52    /// <param name="Source">待加密的串</param>     53    /// <returns>经过加密的串</returns>     54    public string Encrypto(string Source)  55    {  56        byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source);  57        MemoryStream ms = new MemoryStream();  58        mobjCryptoService.Key = GetLegalKey();  59        mobjCryptoService.IV = GetLegalIV();  60        ICryptoTransform encrypto = mobjCryptoService.CreateEncryptor();  61        CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);  62        cs.Write(bytIn, 0, bytIn.Length);  63        cs.FlushFinalBlock();  64        ms.Close();  65        byte[] bytOut = ms.ToArray();  66        return Convert.ToBase64String(bytOut);  67    }  68    /// <summary>     69    /// 解密方法     70    /// </summary>     71    /// <param name="Source">待解密的串</param>     72    /// <returns>经过解密的串</returns>     73    public string Decrypto(string Source)  74    {  75        byte[] bytIn = Convert.FromBase64String(Source);  76        MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length);  77        mobjCryptoService.Key = GetLegalKey();  78        mobjCryptoService.IV = GetLegalIV();  79        ICryptoTransform encrypto = mobjCryptoService.CreateDecryptor();  80        CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);  81        StreamReader sr = new StreamReader(cs);  82        return sr.ReadToEnd();  83    } view source print ? 01方法五： 02    using System.IO;  03    using System.Security.Cryptography;  04    using System.Text;  05       06    ...  07       08    //默认密钥向量  09    private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };  10    /// <summary>  11    /// DES加密字符串  12    /// </summary>  13    /// <param name="encryptString">待加密的字符串</param>  14    /// <param name="encryptKey">加密密钥,要求为8位</param>  15    /// <returns>加密成功返回加密后的字符串，失败返回源串</returns>  16    public static string EncryptDES(string encryptString, string encryptKey)  17    {  18        try  19        {  20            byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));  21            byte[] rgbIV = Keys;  22            byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);  23            DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();  24            MemoryStream mStream = new MemoryStream();  25            CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);  26            cStream.Write(inputByteArray, 0, inputByteArray.Length);  27            cStream.FlushFinalBlock();  28            return Convert.ToBase64String(mStream.ToArray());  29        }  30        catch  31        {  32            return encryptString;  33        }  34    }  35       36    /// <summary>  37    /// DES解密字符串  38    /// </summary>  39    /// <param name="decryptString">待解密的字符串</param>  40    /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>  41    /// <returns>解密成功返回解密后的字符串，失败返源串</returns>  42    public static string DecryptDES(string decryptString, string decryptKey)  43    {  44        try  45        {  46            byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);  47            byte[] rgbIV = Keys;  48            byte[] inputByteArray = Convert.FromBase64String(decryptString);  49            DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();  50            MemoryStream mStream = new MemoryStream();  51            CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);  52            cStream.Write(inputByteArray, 0, inputByteArray.Length);  53            cStream.FlushFinalBlock();  54            return Encoding.UTF8.GetString(mStream.ToArray());  55        }  56        catch  57        {  58            return decryptString;  59        }  60    } view source print ? 01方法六(文件加密)： 02    using System.IO;  03    using System.Security.Cryptography;  04    using System.Text;  05       06    ...  07       08    //加密文件  09    private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV)  10    {  11        //Create the file streams to handle the input and output files.  12        FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);  13        FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);  14        fout.SetLength(0);  15       16        //Create variables to help with read and write.  17        byte[] bin = new byte[100]; //This is intermediate storage for the encryption.  18        long rdlen = 0;              //This is the total number of bytes written.  19        long totlen = fin.Length;    //This is the total length of the input file.  20        int len;                     //This is the number of bytes to be written at a time.  21       22        DES des = new DESCryptoServiceProvider();  23        CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write);  24       25        //Read from the input file, then encrypt and write to the output file.  26        while (rdlen < totlen)  27        {  28            len = fin.Read(bin, 0, 100);  29            encStream.Write(bin, 0, len);  30            rdlen = rdlen + len;  31        }  32       33        encStream.Close();  34        fout.Close();  35        fin.Close();  36    }  37       38    //解密文件  39    private static void DecryptData(String inName, String outName, byte[] desKey, byte[] desIV)  40    {  41        //Create the file streams to handle the input and output files.  42        FileStream fin = new FileStream(inName, FileMode.Open, FileAccess.Read);  43        FileStream fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);  44        fout.SetLength(0);  45       46        //Create variables to help with read and write.  47        byte[] bin = new byte[100]; //This is intermediate storage for the encryption.  48        long rdlen = 0;              //This is the total number of bytes written.  49        long totlen = fin.Length;    //This is the total length of the input file.  50        int len;                     //This is the number of bytes to be written at a time.  51       52        DES des = new DESCryptoServiceProvider();  53        CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write);  54       55        //Read from the input file, then encrypt and write to the output file.  56        while (rdlen < totlen)  57        {  58            len = fin.Read(bin, 0, 100);  59            encStream.Write(bin, 0, len);  60            rdlen = rdlen + len;  61        }  62       63        encStream.Close();  64        fout.Close();  65        fin.Close();  66   67}

 

view source print ? 01using System; 02using System.Security.Cryptography;//这个是处理文字编码的前提 03using System.Text; 04using System.IO; 05/// <summary> 06/// DES加密方法 07/// </summary> 08/// <param name="strPlain">明文</param> 09/// <param name="strDESKey">密钥</param> 10/// <param name="strDESIV">向量</param> 11/// <returns>密文</returns> 12public string DESEncrypt(string strPlain,string strDESKey,string strDESIV) 13{ 14 //把密钥转换成字节数组 15 byte[] bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey); 16 //把向量转换成字节数组 17 byte[] bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV); 18 //声明1个新的DES对象 19 DESCryptoServiceProvider desEncrypt=new DESCryptoServiceProvider(); 20 //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); 26 //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> 50public 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}