各种密码体制加密解密的算法函数总结

下面是源代码，注意添加蓝色引用。有示例程序，在我的资源下载里，只要更换函数就能实现明文密文的加密和解密。

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO;

using System.Security.Cryptography;

namespace test_CryptoGraphy

{

class Program

{

/// <summary>

/// MD5 加密静态方法

/// </summary>

/// <param name="EncryptString">待加密的明文</param>

/// <returns>加密后的密文</returns>

public static string MD5Encrypt(string EncryptString)

{

if (string.IsNullOrEmpty(EncryptString))

{

throw(new Exception("明文不得为空！"));

}

MD5 m_ClassMD5 = new MD5CryptoServiceProvider();

string m_strEncrypt = "";

try

{

m_strEncrypt = BitConverter.ToString(m_ClassMD5.ComputeHash(Encoding.Default.GetBytes(EncryptString))).Replace("-","");

}

catch (ArgumentException ex)

{

throw ex;

}

catch (CryptographicException ex)

{

throw ex;

}

catch (Exception ex)

{

throw ex;

}

finally

{

m_ClassMD5.Clear();

}

return m_strEncrypt;

}

/// <summary>

/// DES 加密(数据加密标准，速度较快，适用于加密大量数据的场合）

/// </summary>

/// <param name="EncryptString">待加密的明文</param>

/// <param name="EncryptKey">加密的密钥</param>

/// <returns>加密后的密文</returns>

public static string DESEncrypt(string EncryptString, string EncryptKey)

{

if (string.IsNullOrEmpty(EncryptString))

{

throw (new Exception("明文不得为空！"));

}

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 (ArgumentException ex)

{

throw ex;

}

catch (CryptographicException ex)

{

throw ex;

}

catch (Exception ex)

{

throw ex;

}

finally

{

m_DESProvider.Clear();

}

return m_strEncrypt;

}

/// <summary>

/// 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>

/// <param name="DecryptString">待解密的密文</param>

/// <param name="DecryptKey">解密的密钥</param>

/// <returns>解密后的明文</returns>

public static string DESDecrypt(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 != 8)

{

throw new Exception("密钥必须为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 (ArgumentException ex)

{

throw ex;

}

catch (CryptographicException ex)

{

throw ex;

}

catch (Exception ex)

{

throw ex;

}

finally

{

m_DESProvider.Clear();

}

return m_strDecrypt;

}

/* /// <summary>

/// 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>

/// <param name="DecryptString">待解密的密文</param>

/// <param name="DecryptKey">解密的密钥</param>

/// <returns>returns</returns>

public static string DESDecrypt(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 != 8) { throw (new Exception("密钥必须为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;

}*/

/// <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;

}

/// <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;

}

/// <summary>

/// 3DES 加密(基于DES，对一块数据用三个不同的密钥进行三次加密，强度更高)

/// </summary>

/// <param name="EncryptString">待加密密文</param>

/// <param name="EncryptKey1">密钥一</param>

/// <param name="EncryptKey2">密钥二</param>

/// <param name="EncryptKey3">密钥三</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;

}

/// <summary>

/// 3DES 解密(基于DES，对一块数据用三个不同的密钥进行三次加密，强度更高)

/// </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;

}

/// <summary>

/// AES 加密(高级加密标准，是下一代的加密算法标准，速度快，安全级别高，目前 AES 标准的一个实现是 Rijndael 算法)

/// </summary>

/// <param name="EncryptString">待加密密文</param>

/// <param name="EncryptKey">加密密钥</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;

}

/// <summary>

/// AES 解密(高级加密标准，是下一代的加密算法标准，速度快，安全级别高，目前 AES 标准的一个实现是 Rijndael 算法)

/// </summary>

/// <param name="DecryptString">待解密密文</param>

/// <param name="DecryptKey">解密密钥</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;

}