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C#可逆加密算法收集

2008-12-13 08:24:28 编辑來源:互联网 国际版 评论
 
 
本文为【C#可逆加密算法收集】的汉字拼音对照版显示拼音
  zuijinyaoyongdaozhegeshundaishoujixia

  yixiashiguanyuduichengjiamisuanfadeC#shixiandaimadajiakeyigenjuxuyaogenggaibutongdesuanfawenzhongyiRijndaelsuanfaweiliview plaincopy to clipboardprint?

  using System;

  using System.IO;

  using System.Security.Cryptography;

  

  using System.Text;

  

  namespace DataCrypto

  {

  /// <summary>

  /// duichengjiamisuanfalei

  /// </summary>

  public class SymmetricMethod

  {

  

  private SymmetricAlgorithm mobjCryptoService;

  private string Key;

  /// <summary>

  /// duichengjiamileidegouzaohanshu

  /// </summary>

  public SymmetricMethod()

  {

  mobjCryptoService = new RijndaelManaged();

  Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7";

  }

  /// <summary>

  /// huodemiyao

  /// </summary>

  /// <returns>miyao</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>

  /// huodechushixiangliangIV

  /// </summary>

  /// <returns>chushixiangliangIV</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>

  /// jiamifangfa

  /// </summary>

  /// <param name="Source">daijiamidechuan</param>

  /// <returns>jingguojiamidechuan</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>

  /// jiemifangfa

  /// </summary>

  /// <param name="Source">daijiemidechuan</param>

  /// <returns>jingguojiemidechuan</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();

  }

  }

  }原文
 
 
最近要用到这个顺带收集下 以下是关于对称加密算法的C#实现代码,大家可以根据需要更改不同的算法,文中以Rijndael算法为例:view plaincopy to clipboardprint? using System; using System.IO; using System.Security.Cryptography; using System.Text; namespace DataCrypto { /// <summary> /// 对称加密算法类 /// </summary> public class SymmetricMethod { 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(); } } }
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