DESCryptoServiceProvider如何加密解密求解
DESCryptoServiceProvider如何加密解密求解
DESC
--------------------编程问答--------------------
#region ========DES加密========
/// <summary>
/// DES加密
/// </summary>
/// <param name="Text">待加密的字符串</param>
/// <returns>加密后的字符串</returns>
public static string DESEncrypt(string Text)
{
return DESEncrypt(Text, "vxseyajjhghhgulan");
}
/// <summary>
/// DES加密数据
/// </summary>
/// <param name="Text">待加密的字符串</param>
/// <param name="sKey">加密密钥</param>
/// <returns>加密后的字符串</returns>
public static string DESEncrypt(string Text, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray;
inputByteArray = Encoding.Default.GetBytes(Text);
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
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);
}
return ret.ToString();
}
#endregion
#region ========DES解密========
/// <summary>
/// DES解密
/// </summary>
/// <param name="Text">待解密的字符串</param>
/// <returns>解密后的明文</returns>
public static string DESDecrypt(string Text)
{
return DESDecrypt(Text, "vxseyajjhghhgulan");
}
/// <summary>
/// DES解密数据
/// </summary>
/// <param name="Text">待解密的字符串</param>
/// <param name="sKey">解密密钥</param>
/// <returns>解密后的明文</returns>
public static string DESDecrypt(string Text, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
int len;
len = Text.Length / 2;
byte[] inputByteArray = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
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();
return Encoding.Default.GetString(ms.ToArray());
}
#endregion
补充：.NET技术 , ASP.NET
