加密解密类

public static class EncryptUtils
{

/// <summary>
/// 解析二次加密后的token
/// </summary>
/// <param name="token"></param>
/// <param name="userId">返回解密后的Userid，如果是-1就需要调用Auth重新验证</param>
/// <returns></returns>
public static int DecryptToken(string token)
{
if (string.IsNullOrEmpty(token))
{
return -1;
}

if (token.Contains("DXoY1U2iK=") && token.Contains("sFd4DsAf82aS5+"))
{
var tokenSplit = token.Split(new string[] { "DXoY1U2iK=", "sFd4DsAf82aS5+" }, StringSplitOptions.RemoveEmptyEntries);
if (tokenSplit.Length < 3)
{
return -1;
}
else
{
var timeStr = SOA.Api.ProjectTool.DESEncryptHelper.Base64Decrypt(tokenSplit[1], "159862");
var userStr = SOA.Api.ProjectTool.DESEncryptHelper.Base64Decrypt(tokenSplit[2], "2674536");
DateTime time;
if (!DateTime.TryParse(timeStr, out time))
{
return -1;
}
if (time < DateTime.Now)
{
return -1;
}
int userId2;
if (!int.TryParse(userStr, out userId2))
{
return -1;
}
return userId2;
}
}
else
{
return -1;
}
}

public static string Md5Code(string str)
{
StringBuilder PwdSb = new StringBuilder();
string cl = str;
MD5 md5 = MD5.Create();//实例化一个md5对像
// 加密后是一个字节类型的数组，这里要注意编码UTF8/Unicode等的选择　
byte[] s = md5.ComputeHash(Encoding.UTF8.GetBytes(cl));
// 通过使用循环，将字节类型的数组转换为字符串，此字符串是常规字符格式化所得
for (int i = 0; i < s.Length; i++)
{
// 将得到的字符串使用十六进制类型格式。格式后的字符是小写的字母，如果使用大写（X）则格式后的字符是大写字符
//pwd = pwd + s[i].ToString("X2");
PwdSb.Append(s[i].ToString("X2"));
}
return PwdSb.ToString();
}

/// <summary>
/// GB2312编码方式 MD5加密
/// </summary>
/// <param name="encypStr"></param>
/// <param name="charset"></param>
/// <returns></returns>
public static string GetMD5(string encypStr, string charset)
{
string retStr;
MD5CryptoServiceProvider m5 = new MD5CryptoServiceProvider();

//创建md5对象
byte[] inputBye;
byte[] outputBye;

//使用GB2312编码方式把字符串转化为字节数组．
try
{
inputBye = Encoding.GetEncoding(charset).GetBytes(encypStr);
}
catch (Exception ex)
{
inputBye = Encoding.GetEncoding("GB2312").GetBytes(encypStr);
}
outputBye = m5.ComputeHash(inputBye);

retStr = System.BitConverter.ToString(outputBye);
retStr = retStr.Replace("-", "").ToUpper();
return retStr;
}

/// <summary>
/// Base64加密
/// </summary>
/// <param name="Message"></param>
/// <returns></returns>
public static string Base64Code(string Message)
{
byte[] bytes = Encoding.Default.GetBytes(Message);
return Convert.ToBase64String(bytes);
}

/// <summary>
/// Base64解密
/// </summary>
/// <param name="Message"></param>
/// <returns></returns>
public static string Base64Decode(string Message)
{
byte[] bytes = Convert.FromBase64String(Message);
return Encoding.Default.GetString(bytes);
}

}