public class Encrypt
{
/// <summary>
/// 当前程序加密所使用的密钥
/// </summary>
public static readonly string sKey = "xxxxxxxxxxDES";
#region 加密方法
/// <summary>
/// 加密方法
/// </summary>
/// <param name="pToEncrypt">需要加密字符串</param>
/// <param name="sKey">密钥</param>
/// <returns>加密后的字符串</returns>
public static string DESEncrypt(string pToEncrypt)
{
try
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
//把字符串放到byte数组中
//原来使用的UTF8编码,我改成Unicode编码了,不行
byte[] inputByteArray = Encoding.UTF8.GetBytes(pToEncrypt);
//建立加密对象的密钥和偏移量
//使得输入密码必须输入英文文本
des.Key = Encoding.UTF8.GetBytes(sKey);
des.IV = Encoding.UTF8.GetBytes(sKey);
MemoryStream ms = new 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);
}
ret.ToString();
return ret.ToString();
}
catch (Exception ex)
{
System.Web.HttpContext.Current.Response.Write("写入配置信息失败,详细信息:" + ex.Message.Replace("\r\n", "").Replace("'", ""));
}
return "";
}
#endregion
#region 解密方法
/// <summary>
/// 解密方法
/// </summary>
/// <param name="pToDecrypt">需要解密的字符串</param>
/// <param name="sKey">密匙</param>
/// <returns>解密后的字符串</returns>
public static string DESDecrypt(string pToDecrypt)
{
try
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for (int x = 0; x < pToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
//建立加密对象的密钥和偏移量,此值重要,不能修改
des.Key = Encoding.UTF8.GetBytes(sKey);
des.IV = Encoding.UTF8.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//建立StringBuild对象,CreateDecrypt使用的是流对象,必须把解密后的文本变成流对象
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.UTF8.GetString(ms.ToArray());
}
catch (Exception ex)
{
System.Web.HttpContext.Current.Response.Write("读取配置信息失败,详细信息:" + ex.Message.Replace("\r\n", "").Replace("'", ""));
}
return "";
}
#endregion
#region MD5编码方法
/// <summary>
/// MD5编码方法
/// </summary>
/// <param name="pToDecrypt">需要编码的字符串</param>
/// <returns>编码后的字符串</returns>
public static string MD5Encrypt(string pToEncrypt)
{
return FormsAuthentication.HashPasswordForStoringInConfigFile(pToEncrypt, "MD5");
}
#endregion
#region SHA1编码方法
/// <summary>
/// MD5编码方法
/// </summary>
/// <param name="pToDecrypt">需要编码的字符串</param>
/// <returns>编码后的字符串</returns>
public static string SHA1Encrypt(string pToEncrypt)
{
return FormsAuthentication.HashPasswordForStoringInConfigFile(pToEncrypt, "SHA1");
}
#endregion
}