C# 各種加密方法封裝類，軟創(chuàng)加密類，內(nèi)含MD5加密解密、DES法解密加密、RC2加密解密、3DES加密解密，還有AES加解密等，使用時(shí)用到哪一種加密方法，可把代碼單獨(dú)摘錄出來(lái)，本類比較綜合，代碼中包括注釋，完整代碼：
    view sourceprint?001using System;
    002using System.Collections.Generic;
    003using System.Text;
    004using System.IO;
    005using System.Security.Cryptography;
    006namespace CLB.Utility.CharTools
    007{
    008 ///
    009 /// 軟創(chuàng)加密類
    010 ///
    011 public static class Cryptography
    012 {
    013 ///
    014 /// MD5 加密,靜態(tài)方法
    015 ///
    016 /// 待加密的密文
    017 /// returns
    018 public static string MD5Encrypt(string EncryptString)
    019 {
    020 if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得為空")); }
    021 MD5 m_ClassMD5 = new MD5CryptoServiceProvider();
    022 string m_strEncrypt = "";
    023 try
    024 {
    025 m_strEncrypt = BitConverter.ToString(m_ClassMD5.ComputeHash(Encoding.Default.GetBytes(EncryptString))).Replace("-", "");
    026 }
    027 catch (ArgumentException ex) { throw ex; }
    028 catch (CryptographicException ex) { throw ex; }
    029 catch (Exception ex) { throw ex; }
    030 finally { m_ClassMD5.Clear(); }
    031 return m_strEncrypt;
    032 }
    033 ///
    034 /// DES 加密(數(shù)據(jù)加密標(biāo)準(zhǔn)，速度較快，適用于加密大量數(shù)據(jù)的場(chǎng)合)
    035 ///
    036 /// 待加密的密文
    037 /// 加密的密鑰
    038 /// returns
    039 public static string DESEncrypt(string EncryptString, string EncryptKey)
    040 {
    041 if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得為空")); }
    042 if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密鑰不得為空")); }
    043 if (EncryptKey.Length != 8) { throw (new Exception("密鑰必須為8位")); }
    044 byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
    045 string m_strEncrypt = "";
    046 DESCryptoServiceProvider m_DESProvider = new DESCryptoServiceProvider();
    047 try
    048 {
    049 byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString);
    050 MemoryStream m_stream = new MemoryStream();
    051 CryptoStream m_cstream = new CryptoStream(m_stream, m_DESProvider.CreateEncryptor(Encoding.Default.GetBytes(EncryptKey), m_btIV), CryptoStreamMode.Write);
    052 m_cstream.Write(m_btEncryptString, 0, m_btEncryptString.Length);
    053 m_cstream.FlushFinalBlock();
    054 m_strEncrypt = Convert.ToBase64String(m_stream.ToArray());
    055 m_stream.Close(); m_stream.Dispose();
    056 m_cstream.Close(); m_cstream.Dispose();
    057 }
    058 catch (IOException ex) { throw ex; }
    059 catch (CryptographicException ex) { throw ex; }
    060 catch (ArgumentException ex) { throw ex; }
    061 catch (Exception ex) { throw ex; }
    062 finally { m_DESProvider.Clear(); }
    063 return m_strEncrypt;
    064 }
    065 ///
    066 /// DES 解密(數(shù)據(jù)加密標(biāo)準(zhǔn)，速度較快，適用于加密大量數(shù)據(jù)的場(chǎng)合)
    067 ///
    068 /// 待解密的密文
    069 /// 解密的密鑰
    070 /// returns
    071 public static string DESDecrypt(string DecryptString, string DecryptKey)
    072 {
    073 if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密文不得為空")); }
    074 if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密鑰不得為空")); }
    075 if (DecryptKey.Length != 8) { throw (new Exception("密鑰必須為8位")); }
    076 byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
    077 string m_strDecrypt = "";
    078 DESCryptoServiceProvider m_DESProvider = new DESCryptoServiceProvider();
    079 try
    080 {
    081 byte[] m_btDecryptString = Convert.FromBase64String(DecryptString);
    082 MemoryStream m_stream = new MemoryStream();
    083 CryptoStream m_cstream = new CryptoStream(m_stream, m_DESProvider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write);
    084 m_cstream.Write(m_btDecryptString, 0, m_btDecryptString.Length);
    085 m_cstream.FlushFinalBlock();
    086 m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray());
    087 m_stream.Close(); m_stream.Dispose();
    088 m_cstream.Close(); m_cstream.Dispose();
    089 }
    090 catch (IOException ex) { throw ex; }
    091 catch (CryptographicException ex) { throw ex; }
    092 catch (ArgumentException ex) { throw ex; }
    093 catch (Exception ex) { throw ex; }
    094 finally { m_DESProvider.Clear(); }
    095 return m_strDecrypt;
    096 }
    097 ///
    098 /// RC2 加密(用變長(zhǎng)密鑰對(duì)大量數(shù)據(jù)進(jìn)行加密)
    099 ///
    100 /// 待加密密文
    101 /// 加密密鑰
    102 /// returns
    103 public static string RC2Encrypt(string EncryptString, string EncryptKey)
    104 {
    105 if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得為空")); }
    106 if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密鑰不得為空")); }
    107 if (EncryptKey.Length < 5 || EncryptKey.Length > 16) { throw (new Exception("密鑰必須為5-16位")); }
    108 string m_strEncrypt = "";
    109 byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
    110 RC2CryptoServiceProvider m_RC2Provider = new RC2CryptoServiceProvider();
    111 try
    112 {
    113 byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString);
    114 MemoryStream m_stream = new MemoryStream();
    115 CryptoStream m_cstream = new CryptoStream(m_stream, m_RC2Provider.CreateEncryptor(Encoding.Default.GetBytes(EncryptKey), m_btIV), CryptoStreamMode.Write);
    116 m_cstream.Write(m_btEncryptString, 0, m_btEncryptString.Length);
    117 m_cstream.FlushFinalBlock();
    118 m_strEncrypt = Convert.ToBase64String(m_stream.ToArray());
    119 m_stream.Close(); m_stream.Dispose();
    120 m_cstream.Close(); m_cstream.Dispose();
    121 }
    122 catch (IOException ex) { throw ex; }
    123 catch (CryptographicException ex) { throw ex; }
    124 catch (ArgumentException ex) { throw ex; }
    125 catch (Exception ex) { throw ex; }
    126 finally { m_RC2Provider.Clear(); }
    127 return m_strEncrypt;
    128 }
    129 ///
    130 /// RC2 解密(用變長(zhǎng)密鑰對(duì)大量數(shù)據(jù)進(jìn)行加密)
    131 ///
    132 /// 待解密密文
    133 /// 解密密鑰
    134 /// returns
    135 public static string RC2Decrypt(string DecryptString, string DecryptKey)
    136 {
    137 if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密文不得為空")); }
    138 if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密鑰不得為空")); }
    139 if (DecryptKey.Length < 5 || DecryptKey.Length > 16) { throw (new Exception("密鑰必須為5-16位")); }
    140 byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
    141 string m_strDecrypt = "";
    142 RC2CryptoServiceProvider m_RC2Provider = new RC2CryptoServiceProvider();
    143 try
    144 {
    145 byte[] m_btDecryptString = Convert.FromBase64String(DecryptString);
    146 MemoryStream m_stream = new MemoryStream();
    147 CryptoStream m_cstream = new CryptoStream(m_stream, m_RC2Provider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write);
    148 m_cstream.Write(m_btDecryptString, 0, m_btDecryptString.Length);
    149 m_cstream.FlushFinalBlock();
    150 m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray());
    151 m_stream.Close(); m_stream.Dispose();
    152 m_cstream.Close(); m_cstream.Dispose();
    153 }
    154 catch (IOException ex) { throw ex; }
    155 catch (CryptographicException ex) { throw ex; }
    156 catch (ArgumentException ex) { throw ex; }
    157 catch (Exception ex) { throw ex; }
    158 finally { m_RC2Provider.Clear(); }
    159 return m_strDecrypt;
    160 }
    161 ///
    162 /// 3DES 加密(基于DES，對(duì)一塊數(shù)據(jù)用三個(gè)不同的密鑰進(jìn)行三次加密，強(qiáng)度更高)
    163 ///
    164 /// 待加密密文
    165 /// 密鑰一
    166 /// 密鑰二
    167 /// 密鑰三
    168 /// returns
    169 public static string DES3Encrypt(string EncryptString, string EncryptKey1, string EncryptKey2, stringEncryptKey3)
    170 {
    171 string m_strEncrypt = "";
    172 try
    173 {
    174 m_strEncrypt = DESEncrypt(EncryptString, EncryptKey3);
    175 m_strEncrypt = DESEncrypt(m_strEncrypt, EncryptKey2);
    176 m_strEncrypt = DESEncrypt(m_strEncrypt, EncryptKey1);
    177 }
    178 catch (Exception ex) { throw ex; }
    179 return m_strEncrypt;
    180 }
    181 ///
    182 /// 3DES 解密(基于DES，對(duì)一塊數(shù)據(jù)用三個(gè)不同的密鑰進(jìn)行三次加密，強(qiáng)度更高)
    183 ///
    184 /// 待解密密文
    185 /// 密鑰一
    186 /// 密鑰二
    187 /// 密鑰三
    188 /// returns
    189 public static string DES3Decrypt(string DecryptString, string DecryptKey1, string DecryptKey2, stringDecryptKey3)
    190 {
    191 string m_strDecrypt = "";
    192 try
    193 {
    194 m_strDecrypt = DESDecrypt(DecryptString, DecryptKey1);
    195 m_strDecrypt = DESDecrypt(m_strDecrypt, DecryptKey2);
    196 m_strDecrypt = DESDecrypt(m_strDecrypt, DecryptKey3);
    197 }
    198 catch (Exception ex) { throw ex; }
    199 return m_strDecrypt;
    200 }
    201 ///
    202 /// AES 加密(高級(jí)加密標(biāo)準(zhǔn)，是下一代的加密算法標(biāo)準(zhǔn)，速度快，安全級(jí)別高，目前 AES 標(biāo)準(zhǔn)的一個(gè)實(shí)現(xiàn)是 Rijndael 算法)
    203 ///
    204 /// 待加密密文
    205 /// 加密密鑰
    206 ///
    207 public static string AESEncrypt(string EncryptString, string EncryptKey)
    208 {
    209 if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得為空")); }
    210 if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密鑰不得為空")); }
    211 string m_strEncrypt = "";
    212 byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ==");
    213 Rijndael m_AESProvider = Rijndael.Create();
    214 try
    215 {
    216 byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString);
    217 MemoryStream m_stream = new MemoryStream();
    218 CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateEncryptor(Encoding.Default.GetBytes(EncryptKey), m_btIV), CryptoStreamMode.Write);
    219 m_csstream.Write(m_btEncryptString, 0, m_btEncryptString.Length); m_csstream.FlushFinalBlock();
    220 m_strEncrypt = Convert.ToBase64String(m_stream.ToArray());
    221 m_stream.Close(); m_stream.Dispose();
    222 m_csstream.Close(); m_csstream.Dispose();
    223 }
    224 catch (IOException ex) { throw ex; }
    225 catch (CryptographicException ex) { throw ex; }
    226 catch (ArgumentException ex) { throw ex; }
    227 catch (Exception ex) { throw ex; }
    228 finally { m_AESProvider.Clear(); }
    229 return m_strEncrypt;
    230 }
    231 ///
    232 /// AES 解密(高級(jí)加密標(biāo)準(zhǔn)，是下一代的加密算法標(biāo)準(zhǔn)，速度快，安全級(jí)別高，目前 AES 標(biāo)準(zhǔn)的一個(gè)實(shí)現(xiàn)是 Rijndael 算法)
    233 ///
    234 /// 待解密密文
    235 /// 解密密鑰
    236 ///
    237 public static string AESDecrypt(string DecryptString, string DecryptKey)
    238 {
    239 if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密文不得為空")); }
    240 if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密鑰不得為空")); }
    241 string m_strDecrypt = "";
    242 byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ==");
    243 Rijndael m_AESProvider = Rijndael.Create();
    244 try
    245 {
    246 byte[] m_btDecryptString = Convert.FromBase64String(DecryptString);
    247 MemoryStream m_stream = new MemoryStream();
    248 CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write);
    249 m_csstream.Write(m_btDecryptString, 0, m_btDecryptString.Length); m_csstream.FlushFinalBlock();
    250 m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray());
    251 m_stream.Close(); m_stream.Dispose();
    252 m_csstream.Close(); m_csstream.Dispose();
    253 }
    254 catch (IOException ex) { throw ex; }
    255 catch (CryptographicException ex) { throw ex; }
    256 catch (ArgumentException ex) { throw ex; }
    257 catch (Exception ex) { throw ex; }
    258 finally { m_AESProvider.Clear(); }
    259 return m_strDecrypt;
    260 }
    261 }
    262}