C#常用数据加密类
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks; namespace Cryptography
{
public static class EncryptComputer
{ #region DES加密速度較快，適用於加密大量數據的場合
/// <summary>
/// DES加密速度較快，適用於加密大量數據的場合
/// </summary>
/// <param name="EncryptString">待加密的密文</param>
/// <param name="EncryptKey">加密的密鑰</param>
/// <returns>returns</returns> public static string DESEncrypt(string EncryptString, string EncryptKey)
{ if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得为空")); } if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密钥不得为空")); } if (EncryptKey.Length != 8) { throw (new Exception("密钥必须为8位")); } byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; string m_strEncrypt = ""; DESCryptoServiceProvider m_DESProvider = new DESCryptoServiceProvider(); try
{ byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_cstream = new CryptoStream(m_stream, m_DESProvider.CreateEncryptor(Encoding.Default.GetBytes(EncryptKey), m_btIV), CryptoStreamMode.Write); m_cstream.Write(m_btEncryptString, 0, m_btEncryptString.Length); m_cstream.FlushFinalBlock(); m_strEncrypt = Convert.ToBase64String(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_cstream.Close(); m_cstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_DESProvider.Clear(); } return m_strEncrypt; }
#endregion #region DES 解密(数据加密标准，速度较快，适用于加密大量数据的场合)
/// <summary> /// DES 解密(加密速度較快，適用於加密大量數據的場合) /// </summary> /// <param name="DecryptString">待解密的密文</param> /// <param name="DecryptKey">解密的密鑰</param> /// <returns>returns</returns> public static string DESDecrypt(string DecryptString, string DecryptKey)
{ if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密鑰不得為空")); } if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密鑰不得為空")); } if (DecryptKey.Length != 8) { throw (new Exception("密鑰必須為8位")); } byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; string m_strDecrypt = ""; DESCryptoServiceProvider m_DESProvider = new DESCryptoServiceProvider(); try
{ byte[] m_btDecryptString = Convert.FromBase64String(DecryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_cstream = new CryptoStream(m_stream, m_DESProvider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write); m_cstream.Write(m_btDecryptString, 0, m_btDecryptString.Length); m_cstream.FlushFinalBlock(); m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_cstream.Close(); m_cstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_DESProvider.Clear(); } return m_strDecrypt; }
#endregion #region RC2 加密(用变长密钥对大量数据进行加密)
/// <summary> /// RC2 加密(用变长密钥对大量数据进行加密) /// </summary> /// <param name="EncryptString">待加密密文</param> /// <param name="EncryptKey">加密密钥</param> /// <returns>returns</returns> public static string RC2Encrypt(string EncryptString, string EncryptKey)
{ if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得为空")); } if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密钥不得为空")); } if (EncryptKey.Length < 5 || EncryptKey.Length > 16) { throw (new Exception("密钥必须为5-16位")); } string m_strEncrypt = ""; byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; RC2CryptoServiceProvider m_RC2Provider = new RC2CryptoServiceProvider(); try
{ byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_cstream = new CryptoStream(m_stream, m_RC2Provider.CreateEncryptor(Encoding.Default.GetBytes(EncryptKey), m_btIV), CryptoStreamMode.Write); m_cstream.Write(m_btEncryptString, 0, m_btEncryptString.Length); m_cstream.FlushFinalBlock(); m_strEncrypt = Convert.ToBase64String(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_cstream.Close(); m_cstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_RC2Provider.Clear(); } return m_strEncrypt; }
#endregion #region RC2 解密(用变长密钥对大量数据进行加密)
/// <summary> /// RC2 解密(用变长密钥对大量数据进行加密) /// </summary> /// <param name="DecryptString">待解密密文</param> /// <param name="DecryptKey">解密密钥</param> /// <returns>returns</returns> public static string RC2Decrypt(string DecryptString, string DecryptKey)
{ if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密文不得为空")); } if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密钥不得为空")); } if (DecryptKey.Length < 5 || DecryptKey.Length > 16) { throw (new Exception("密钥必须为5-16位")); } byte[] m_btIV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; string m_strDecrypt = ""; RC2CryptoServiceProvider m_RC2Provider = new RC2CryptoServiceProvider(); try
{ byte[] m_btDecryptString = Convert.FromBase64String(DecryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_cstream = new CryptoStream(m_stream, m_RC2Provider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write); m_cstream.Write(m_btDecryptString, 0, m_btDecryptString.Length); m_cstream.FlushFinalBlock(); m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_cstream.Close(); m_cstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_RC2Provider.Clear(); } return m_strDecrypt; }
#endregion #region 3DES加密基於DES，對一塊數據用三個不同的秘鑰進行三次加密，強度更高些
/// <summary> /// 3DES加密基於DES，對一塊數據用三個不同的密鑰進行三次加密，強度更高些 /// </summary> /// <param name="EncryptString">待加密密文</param> /// <param name="EncryptKey1">密鑰一</param> /// <param name="EncryptKey2">密鑰二</param> /// <param name="EncryptKey3">密鑰三</param> /// <returns>returns</returns> public static string DES3Encrypt(string EncryptString, string EncryptKey1, string EncryptKey2, string EncryptKey3)
{ string m_strEncrypt = ""; try
{ m_strEncrypt = DESEncrypt(EncryptString, EncryptKey3); m_strEncrypt = DESEncrypt(m_strEncrypt, EncryptKey2); m_strEncrypt = DESEncrypt(m_strEncrypt, EncryptKey1); } catch (Exception ex) { throw ex; } return m_strEncrypt; }
#endregion #region 3DES 解密(3DES加密基於DES，對一塊數據用三個不同的密鑰進行三次加密，強度更高些)
/// <summary> /// 3DES 解密(3DES加密基於DES，對一塊數據用三個不同的密鑰進行三次加密，強度更高些) /// </summary> /// <param name="DecryptString">待解密密文</param> /// <param name="DecryptKey1">密钥一</param> /// <param name="DecryptKey2">密钥二</param> /// <param name="DecryptKey3">密钥三</param> /// <returns>returns</returns> public static string DES3Decrypt(string DecryptString, string DecryptKey1, string DecryptKey2, string DecryptKey3)
{ string m_strDecrypt = ""; try
{ m_strDecrypt = DESDecrypt(DecryptString, DecryptKey1); m_strDecrypt = DESDecrypt(m_strDecrypt, DecryptKey2); m_strDecrypt = DESDecrypt(m_strDecrypt, DecryptKey3); } catch (Exception ex) { throw ex; } return m_strDecrypt; }
#endregion #region AES 加密為高級加密標準，是下一代加密算法的標準，速度快，安全級別高
/// <summary> /// AES 加密為高級加密標準，是下一代加密算法的標準，速度快，安全級別高 /// </summary> /// <param name="EncryptString">待加密密文</param> /// <param name="EncryptKey">加密密鑰</param> /// <returns></returns> public static string AESEncrypt(string EncryptString, string EncryptKey)
{ if (string.IsNullOrEmpty(EncryptString)) { throw (new Exception("密文不得为空")); } if (string.IsNullOrEmpty(EncryptKey)) { throw (new Exception("密钥不得为空")); } string m_strEncrypt = ""; byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ=="); Rijndael m_AESProvider = Rijndael.Create(); try
{ byte[] m_btEncryptString = Encoding.Default.GetBytes(EncryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateEncryptor(Encoding.Default.GetBytes(EncryptKey), m_btIV), CryptoStreamMode.Write); m_csstream.Write(m_btEncryptString, 0, m_btEncryptString.Length); m_csstream.FlushFinalBlock(); m_strEncrypt = Convert.ToBase64String(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_csstream.Close(); m_csstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_AESProvider.Clear(); } return m_strEncrypt; }
#endregion #region AES 加密為高級加密標準，是下一代加密算法的標準，速度快，安全級別高
/// <summary> /// AES 加密為高級加密標準，是下一代加密算法的標準，速度快，安全級別高 /// </summary> /// <param name="DecryptString">待解密密文</param> /// <param name="DecryptKey">解密密鑰</param> /// <returns></returns> public static string AESDecrypt(string DecryptString, string DecryptKey)
{ if (string.IsNullOrEmpty(DecryptString)) { throw (new Exception("密文不得为空")); } if (string.IsNullOrEmpty(DecryptKey)) { throw (new Exception("密钥不得为空")); } string m_strDecrypt = ""; byte[] m_btIV = Convert.FromBase64String("Rkb4jvUy/ye7Cd7k89QQgQ=="); Rijndael m_AESProvider = Rijndael.Create(); try
{ byte[] m_btDecryptString = Convert.FromBase64String(DecryptString); MemoryStream m_stream = new MemoryStream(); CryptoStream m_csstream = new CryptoStream(m_stream, m_AESProvider.CreateDecryptor(Encoding.Default.GetBytes(DecryptKey), m_btIV), CryptoStreamMode.Write); m_csstream.Write(m_btDecryptString, 0, m_btDecryptString.Length); m_csstream.FlushFinalBlock(); m_strDecrypt = Encoding.Default.GetString(m_stream.ToArray()); m_stream.Close(); m_stream.Dispose(); m_csstream.Close(); m_csstream.Dispose(); } catch (IOException ex) { throw ex; } catch (CryptographicException ex) { throw ex; } catch (ArgumentException ex) { throw ex; } catch (Exception ex) { throw ex; } finally { m_AESProvider.Clear(); } return m_strDecrypt; }
#endregion }
}
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