WebService接口数据传输加密

public class SecretServer
{
/// <summary>
/// 加密
/// </summary>
/// <param name="encryptStr"></param>
/// <param name="key"></param>
/// <returns></returns>
public static string TextEncrypt(string encryptStr, string key)
{
var bt = Encoding.Default.GetBytes(encryptStr);
var base64Str = Convert.ToBase64String(bt);
key = EncryptToMD5string(key);
byte[] keyArray = Encoding.UTF8.GetBytes(key);
byte[] toEncryptArray = Encoding.UTF8.GetBytes(base64Str);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateEncryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return Convert.ToBase64String(resultArray, 0, resultArray.Length);
}
/// <summary>
/// 解密
/// </summary>
/// <param name="decryptStr"></param>
/// <param name="key"></param>
/// <returns></returns>
public static string TextDecrypt(string decryptStr, string key)
{
key = EncryptToMD5string(key);
byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);
byte[] toEncryptArray = Convert.FromBase64String(decryptStr);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
var td = UTF8Encoding.UTF8.GetString(resultArray);
var str = Convert.FromBase64String(td);
var sd = Encoding.Default.GetString(str);
return sd;
}
public static byte[] EncryptToMD5(string str)
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
byte[] str1 = System.Text.Encoding.UTF8.GetBytes(str);
byte[] str2 = md5.ComputeHash(str1, 0, str1.Length);
md5.Clear();
(md5 as IDisposable).Dispose();
return str2;
}
public static string EncryptToMD5string(string str)
{
byte[] bytHash = EncryptToMD5(str);
string sTemp = "";
for (int i = 0; i < bytHash.Length; i++)
{
sTemp += bytHash[i].ToString("X").PadLeft(2, ‘0‘);
}
return sTemp.ToLower();
}

}