/// <summary>
/// MD5函数
/// </summary>
/// <param name="str">原始字符串</param>
/// <returns>MD5结果</returns>
public static string MD5(string str)
{byte[] b = Encoding.UTF8.GetBytes(str);b = new MD5CryptoServiceProvider().ComputeHash(b);string ret = string.Empty;for (int i = 0; i < b.Length; i++){ret += b[i].ToString("x").PadLeft(2, '0');}return ret;
}/// <summary>
/// AES加密
/// </summary>
/// <param name="toEncrypt"></param>
/// <returns></returns>
public static string AesEncrypt(string toEncrypt)
{if (string.IsNullOrEmpty(toEncrypt)){return string.Empty;}try{byte[] keyArray = Encoding.UTF8.GetBytes(@"7BF45189A0ED4BD6BE7936EFD11169E7");byte[] toEncryptArray = Encoding.UTF8.GetBytes(toEncrypt);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);}catch{return string.Empty;}
}/// <summary>
/// AES解密
/// </summary>
/// <param name="toDecrypt"></param>
/// <returns></returns>
public static string AesDecrypt(string toDecrypt)
{if (string.IsNullOrEmpty(toDecrypt)){return string.Empty;}try{byte[] keyArray = Encoding.UTF8.GetBytes(@"7BF45189A0ED4BD6BE7936EFD11169E7");byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);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);return UTF8Encoding.UTF8.GetString(resultArray);}catch{return string.Empty;}
}