/// <summary>
/// 加密函数
/// </summary>
/// <param name="origialText"></param>
/// <param name="argumentParam"></param>
/// <returns></returns>
public string Encrypt(string origialText, params object[] argumentParam)
{
StringBuilder ret = new StringBuilder();
#region 获取解密算法
string assignKey;
object obj_argKey = null != argumentParam && argumentParam.Length > 0 ? argumentParam.First() : null;
if (null == obj_argKey || string.IsNullOrEmpty(obj_argKey.ToString()))
{
assignKey = this.AlgorithmKey;
}
else
{
assignKey = MD5Handler.Generate(obj_argKey.ToString(), true).Top(8);
}
ICryptoTransform transform = null;
using (DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider())
{
desProvider.Key = ASCIIEncoding.ASCII.GetBytes(assignKey);
desProvider.IV = ASCIIEncoding.ASCII.GetBytes(assignKey);
transform = desProvider.CreateEncryptor();
}
#endregion
#region 执行加密
byte[] inputByteArray;
byte[] cryptoBytes;
inputByteArray = Encoding.Default.GetBytes(origialText);
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, transform, CryptoStreamMode.Write))
{
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
cryptoBytes = ms.ToArray();
}
}
foreach (byte b in cryptoBytes)
{
ret.AppendFormat("{0:X2}", b);
}
#endregion
return(ret.ToString());
}
/// <summary>
/// 解密函数
/// </summary>
/// <param name="ciphertext"></param>
/// <param name="argumentParam"></param>
/// <returns></returns>
public string Decrypt(string ciphertext, params object[] argumentParam)
{
string originalText = null;
if (!this.IsCiphertext(ciphertext))
{
throw new Exception("不是标准的DES密文格式,无法进行解密");
}
#region 验证密文
byte[] cipherBytes = null;
int len = ciphertext.Length / 2;
cipherBytes = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(ciphertext.Substring(x * 2, 2), 16);
cipherBytes[x] = (byte)i;
}
#endregion
#region 获取解密算法
string assignKey;
object obj_argKey = null != argumentParam && argumentParam.Length > 0 ? argumentParam.First() : null;
if (null == obj_argKey || string.IsNullOrEmpty(obj_argKey.ToString()))
{
assignKey = this.AlgorithmKey;
}
else
{
assignKey = MD5Handler.Generate(obj_argKey.ToString(), true).Top(8);
}
ICryptoTransform transform = null;
using (DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider())
{
desProvider.Key = ASCIIEncoding.ASCII.GetBytes(assignKey);
desProvider.IV = ASCIIEncoding.ASCII.GetBytes(assignKey);
transform = desProvider.CreateDecryptor();
}
#endregion
#region 执行解密
using (MemoryStream ms = new MemoryStream())
{
CryptoStream cs = new CryptoStream(ms, transform, CryptoStreamMode.Write);
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.FlushFinalBlock();
originalText = Encoding.Default.GetString(ms.ToArray());
}
#endregion
return(originalText);
}
