項目中經常會用到加密解密,分享 DES & MD5加密,當然我們建議使用MD5.
#region DES encrypt, decrypt public string EncryptDES(string input, string key) { byte[] inputArray = Encoding.UTF8.GetBytes(input); var tripleDES = TripleDES.Create(); var byteKey = Encoding.UTF8.GetBytes(key); byte[] allKey = new byte[24]; Buffer.BlockCopy(byteKey, 0, allKey, 0, 16); Buffer.BlockCopy(byteKey, 0, allKey, 16, 8); tripleDES.Key = allKey; tripleDES.Mode = CipherMode.ECB; tripleDES.Padding = PaddingMode.PKCS7; ICryptoTransform cTransform = tripleDES.CreateEncryptor(); byte[] resultArray = cTransform.TransformFinalBlock(inputArray, 0, inputArray.Length); return Convert.ToBase64String(resultArray, 0, resultArray.Length); } public string DecryptDES(string input, string key) { byte[] inputArray = Convert.FromBase64String(input); var tripleDES = TripleDES.Create(); var byteKey = Encoding.UTF8.GetBytes(key); byte[] allKey = new byte[24]; Buffer.BlockCopy(byteKey, 0, allKey, 0, 16); Buffer.BlockCopy(byteKey, 0, allKey, 16, 8); tripleDES.Key = allKey; tripleDES.Mode = CipherMode.ECB; tripleDES.Padding = PaddingMode.PKCS7; ICryptoTransform cTransform = tripleDES.CreateDecryptor(); byte[] resultArray = cTransform.TransformFinalBlock(inputArray, 0, inputArray.Length); return Encoding.UTF8.GetString(resultArray); } #endregion #region ========MD5 Encrypt & Decrypt======== /// <summary> /// 加密数据 /// </summary> /// <param name="Text"></param> /// <param name="sKey"></param> /// <returns></returns> public string EncryptMD5(string Text, string sKey) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); byte[] inputByteArray; inputByteArray = Encoding.Default.GetBytes(Text); des.Key = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).Substring(0, 8)); des.IV = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).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(); } /// <summary> /// 解密数据 /// </summary> /// <param name="Text"></param> /// <param name="sKey"></param> /// <returns></returns> public string DecryptMD5(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; } //参数str类型是string // 注:.NET Core 不支持System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5");轉為函數Md5Hash(string input) des.Key = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).Substring(0, 8)); des.IV = ASCIIEncoding.ASCII.GetBytes(Md5Hash(sKey).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()); } /// <summary> /// 32位MD5加密 /// </summary> /// <param name="input"></param> /// <returns></returns> private string Md5Hash(string input) { MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider(); byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input)); StringBuilder sBuilder = new StringBuilder(); for (int i = 0; i < data.Length; i++) { sBuilder.Append(data[i].ToString("x2")); } return sBuilder.ToString(); } #endregion