C#加密方法汇总

 

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();

转载于:https://www.cnblogs.com/liyuxin/archive/2011/03/24/1994130.html

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