3 DES暗号化/復号化
18171 ワード
/// <summary>
/// C#/PHP/JSP 3DES （ UTF-8 ）
/// </summary>
public class Crypto3DES
{
/// <summary>
///
/// </summary>
private string Keys;
/// <summary>
/// 8
/// </summary>
private char paddingChar = ' ';
/// <summary>
/// Crypto3DES
/// </summary>
/// <param name="key"> </param>
public Crypto3DES(string key)
{
this.Keys = key;
}
/// <summary>
/// ， 8 8 ， 8 8
/// </summary>
/// <param name="key"> </param>
/// <returns></returns>
private string GetKeyCode(string key)
{
if (key.Length > 8)
return key.Substring(0, 8);
else
return key.PadRight(8, paddingChar);
}
/// <summary>
/// ， 8 8
/// </summary>
/// <param name="strString">The STR string.</param>
/// <returns></returns>
private string GetString(string strString)
{
if (strString.Length < 8)
return strString.PadRight(8, paddingChar);
return strString;
}
/// <summary>
///
/// </summary>
/// <param name="strString"> </param>
/// <returns></returns>
public string Encrypt(string strString)
{
try
{
strString = this.GetString(strString);
DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
DES.Key = Encoding.UTF8.GetBytes(this.GetKeyCode(this.Keys));
DES.Mode = CipherMode.ECB;
DES.Padding = PaddingMode.Zeros;
ICryptoTransform DESEncrypt = DES.CreateEncryptor();
byte[] Buffer = Encoding.UTF8.GetBytes(strString);
return Convert.ToBase64String(DESEncrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));
}
catch (Exception ex) { return ex.Message; }
}
/// <summary>
///
/// </summary>
/// <param name="strString"> </param>
/// <returns></returns>
public string Decrypt(string strString)
{
try
{
DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
DES.Key = Encoding.UTF8.GetBytes(this.GetKeyCode(this.Keys));
DES.Mode = CipherMode.ECB;
DES.Padding = PaddingMode.Zeros;
ICryptoTransform DESDecrypt = DES.CreateDecryptor();
byte[] Buffer = Convert.FromBase64String(strString);
return UTF8Encoding.UTF8.GetString(DESDecrypt.TransformFinalBlock(Buffer, 0, Buffer.Length)).Replace("\0", "").Trim();
}
catch (Exception ex) { return ex.Message; }
}
#region DESEnCode DESDeCode
/// <summary>
/// Java
/// </summary>
/// <param name="pToEncrypt"> </param>
/// <param name="cryptKey"> ，8 ASCII </param>
/// <returns></returns>
public string DESEnCode(string pToEncrypt)
{
if (string.IsNullOrEmpty(pToEncrypt)) return string.Empty;
try
{
pToEncrypt = System.Web.HttpContext.Current.Server.UrlEncode(pToEncrypt);
string key = this.Keys;
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);
des.Key = ASCIIEncoding.ASCII.GetBytes(key);
des.IV = ASCIIEncoding.ASCII.GetBytes(key);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
cs.Close();
cs.Dispose();
ms.Close();
ms.Dispose();
return ret.ToString();
}
catch (System.Exception ex)
{
return ex.Message;
}
}
/// <summary>
/// Java
/// </summary>
/// <param name="pToEncrypt"> </param>
/// <param name="cryptKey"> ，8 ASCII </param>
/// <returns></returns>
public string DESDeCode(string pToEncrypt)
{
if (string.IsNullOrEmpty(pToEncrypt)) return string.Empty;
try
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
int len = pToEncrypt.Length / 2;
byte[] inputByteArray = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(pToEncrypt.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
string key = this.Keys;
des.Key = ASCIIEncoding.ASCII.GetBytes(key);
des.IV = ASCIIEncoding.ASCII.GetBytes(key);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
string ret = System.Web.HttpContext.Current.Server.UrlDecode(System.Text.Encoding.Default.GetString(ms.ToArray()));
cs.Close();
cs.Dispose();
ms.Close();
ms.Dispose();
return ret;
}
catch (System.Exception ex)
{
return ex.Message;
}
}
#endregion
}Crypto3DES des = new Crypto3DES("key");