1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | //引用命名空间 using System.Security.Cryptography; /// <summary> /// AES 加密 /// </summary> /// <param name="str">明文（待加密）</param> /// <param name="key">密文 注意：密文长度有 16，24，32，不能用其它长度的密文</param> /// <returns></returns> public string AesEncrypt(string str, string key) { if (string.IsNullOrEmpty(str)) return null; try { Byte[] toEncryptArray = Encoding.UTF8.GetBytes(str); RijndaelManaged rm = new RijndaelManaged { Key = Encoding.UTF8.GetBytes(key), Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7 }; ICryptoTransform cTransform = rm.CreateEncryptor(); Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length); return Convert.ToBase64String(resultArray); } catch (Exception ex) { string s = ex.Message; return null; } } /// <summary> /// AES 解密 /// </summary> /// <param name="str">明文（待解密）</param> /// <param name="key">密文 注意：密文长度有 16，24，32，不能用其它长度的密文</param> /// <returns></returns> public string AesDecrypt(string str, string key) { if (string.IsNullOrEmpty(str)) return null; try { Byte[] toEncryptArray = Convert.FromBase64String(str); RijndaelManaged rm = new RijndaelManaged { Key = Encoding.UTF8.GetBytes(key), Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7 }; ICryptoTransform cTransform = rm.CreateDecryptor(); Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length); return Encoding.UTF8.GetString(resultArray); } catch (Exception ex) { string s = ex.Message; return null; } } |