C#字符串加密解密

C#字符串加密解密 Posted on 2015-04-23 09:24 haishu 阅读(...) 评论(...) 编辑 收藏 /// <summary> /// 加密字符串 /// 注意:密钥必须为８位 /// </summary> /// <param name="strText">字符串</param> /// <param name="encryptKey">密钥</param> /// <param name="encryptKey">返回加密后的字符串</param> public string DesEncrypt(string inputString, string encryptKey) { byte[] byKey = null; byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; try { byKey = System.Text.Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8)); DESCryptoServicePRovider des = new DESCryptoServiceProvider(); byte[] inputByteArray = Encoding.UTF8.GetBytes(inputString); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); return Convert.ToBase64String(ms.ToArray()); } catch (System.Exception error) { //return error.Message; return null; } } /// <summary> /// 解密字符串 /// </summary> /// <param name="this.inputString">加了密的字符串</param> /// <param name="decryptKey">密钥</param> /// <param name="decryptKey">返回解密后的字符串</param> public string DesDecrypt(string inputString, string decryptKey) { byte[] byKey = null; byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; byte[] inputByteArray = new Byte[inputString.Length]; try { byKey = System.Text.Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8)); DESCryptoServiceProvider des = new DESCryptoServiceProvider(); inputByteArray = Convert.FromBase64String(inputString); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); System.Text.Encoding encoding = new System.Text.UTF8Encoding(); return encoding.GetString(ms.ToArray()); } catch (System.Exception error) { //return error.Message; return null; } }

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