DES3加密解密
2015-12-20 04:31:36 访问(1156) 赞(0) 踩(0)
相关下载：SlowX.Des3EncryptOperApp[code] SlowX.Des3EncryptOperApp[release] 百度网盘
-
-
#region DES 加密
/// <summary>
/// DES 加密
/// </summary>
/// <param name="EncryptKey"></param>
/// <param name="str">明文</param>
/// <param name="_encoding"></param>
/// <returns></returns>
public static string DES3Encrypt
(
string EncryptKey,
string str,
System.Text.Encoding _encoding
)
{
string theResult = "";
TripleDESCryptoServiceProvider DES = null;
ICryptoTransform desEncryptValue = null;
try
{
DES = new TripleDESCryptoServiceProvider();
DES.Key = _encoding.GetBytes(EncryptKey);
DES.Mode = CipherMode.ECB;
desEncryptValue = DES.CreateEncryptor();
byte[] Buffer = _encoding.GetBytes(str);
theResult = Convert.ToBase64String(desEncryptValue.TransformFinalBlock(Buffer, 0, Buffer.Length));
}
catch (Exception err)
{
throw err;
}
finally
{
if (desEncryptValue != null)
{
desEncryptValue.Dispose();
desEncryptValue = null;
}
if (DES != null)
{
DES = null;
}
}
return theResult;
}
#endregion DES 加密
#region DES 解密
/// <summary>
/// DES 解密
/// </summary>
/// <param name="EncryptKey"></param>
/// <param name="str"></param>
/// <param name="_encoding"></param>
/// <returns></returns>
public static string DES3Decrypt
(
string EncryptKey,
string str,
System.Text.Encoding _encoding
)
{
string theResult = "";
TripleDESCryptoServiceProvider DES = null;
ICryptoTransform desDecryptValue = null;
try
{
DES = new TripleDESCryptoServiceProvider();
DES.Key = _encoding.GetBytes(EncryptKey);
DES.Mode = CipherMode.ECB;
desDecryptValue = DES.CreateDecryptor();
byte[] Buffer = Convert.FromBase64String(str);
theResult = _encoding.GetString(desDecryptValue.TransformFinalBlock(Buffer, 0, Buffer.Length));
}
catch (Exception err)
{
throw err;
}
finally
{
if (desDecryptValue != null)
{
desDecryptValue.Dispose();
desDecryptValue = null;
}
if (DES != null)
{
DES = null;
}
}
return theResult;
}
#endregion DES 解密
/// <summary>
/// 字符串转成byte[]数组的String
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string StringToByteArrayString(string str)
{
if (str == null || str.Length == 0)
return "";
byte[] byteArray = Encoding.Default.GetBytes(str);
return ByteArrayToString(byteArray);
}
/// <summary>
/// 字符串转成byte[]数组的String
/// </summary>
/// <param name="str"></param>
/// <param name="_encoding"></param>
/// <returns></returns>
public static string StringToByteArrayString(string str, System.Text.Encoding _encoding)
{
if (str == null || str.Length == 0)
return "";
if (_encoding == null)
{
throw new Exception
(
"方法："
+ MethodBase.GetCurrentMethod().ReflectedType.FullName
+ " "
+ MethodBase.GetCurrentMethod().ToString()
+ " 发生异常："
+ "传入参数：System.Text.Encoding _encoding 为null。"
);
}
byte[] byteArray = _encoding.GetBytes(str);
return ByteArrayToString(byteArray);
}
/// <summary>
///
/// </summary>
/// <param name="byteArray"></param>
/// <returns></returns>
public static string ByteArrayToString(byte[] byteArray)
{
if (byteArray == null)
{
throw new Exception
(
"方法："
+ MethodBase.GetCurrentMethod().ReflectedType.FullName
+ " "
+ MethodBase.GetCurrentMethod().ToString()
+ " 发生异常："
+ "传入参数：byte[] byteArray 为null。"
);
}
StringBuilder theResult = new StringBuilder();
foreach (byte b in byteArray)
{
theResult.Append(b.ToString().PadLeft(3, '0'));
}
return theResult.ToString();
}
/// <summary>
/// 字符串转成byte[]数组
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static byte[] StringToByteArray(string str)
{
if (str == null || str.Length == 0)
return null;
int iLen = str.Length;
if (iLen % 3 != 0)
{
throw new Exception
(
"方法："
+ MethodBase.GetCurrentMethod().ReflectedType.FullName
+ " "
+ MethodBase.GetCurrentMethod().ToString()
+ " 发生异常："
+ "iLen % 3 != 0，传入的字符串不是合理的byte[]值。"
);
}
int iArrayLen = iLen / 3;
byte[] theResult = new byte[iArrayLen];
string strItem = string.Empty;
byte bItem = 1;
for (int i = 0; i < iArrayLen; ++i)
{
strItem = str.Substring(i * 3, 3);
bItem = byte.Parse(strItem);
theResult[i] = bItem;
}
return theResult;
}
/// <summary>
///
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string ByteArrayStringToString(string str)
{
byte[] bArray = StringToByteArray(str);
return Encoding.Default.GetString(bArray);
}
/// <summary>
///
/// </summary>
/// <param name="str"></param>
/// <param name="_encoding"></param>
/// <returns></returns>
public static string ByteArrayStringToString(string str, System.Text.Encoding _encoding)
{
if (_encoding == null)
{
throw new Exception
(
"方法："
+ MethodBase.GetCurrentMethod().ReflectedType.FullName
+ " "
+ MethodBase.GetCurrentMethod().ToString()
+ " 发生异常："
+ "传入参数：System.Text.Encoding _encoding 为null。"
);
}
byte[] bArray = StringToByteArray(str);
return _encoding.GetString(bArray);
}
标签：
DES3加密解密 
上一条：
下一条：
相关评论
发表评论