最近在一个工程中需要对DataSet进行加密,然后以文件形式传输后在另一端解密还原。于是查询了一些资料,发现多是对字符串和文件加密的方法。于是只好自力更生,参考.net的对称加密技术和网上的一些资料,研究出了DataSet的加密方法。
代码比较简单,附下:
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using System;
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using System.Collections;
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using System.Security.Cryptography;
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using System.IO ;
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using System.Data;
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using System.Xml.Serialization;
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namespace zjz.ClsDoCode
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{
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/**//// <summary>
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/// ClsEncryption 的摘要说明。
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/// </summary>
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public class ClsEncryption
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{
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public ClsEncryption()
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{
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//
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// TODO: 在此处添加构造函数逻辑
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//
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}
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//密钥
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//获取或设置对称算法的机密密钥。机密密钥既用于加密,也用于解密。为了保证对称算法的安全,必须只有发送方和接收方知道该机密密钥。有效密钥大小是由特定对称算法实现指定的,密钥大小在 LegalKeySizes 中列出。
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private static byte[] DESKey = new byte[] {11, 23, 93, 102, 72, 41, 18, 12};
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//获取或设置对称算法的初始化向量
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private static byte[] DESIV = new byte[] {75, 158, 46, 97, 78, 57, 17, 36};
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/**//// <summary>
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/// 加密DataSet
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/// </summary>
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/// <param name="objDataSet"></param>
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/// <param name="outFilePath"></param>
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public static void EncryptDataSetToXml(DataSet objDataSet,string outXmlFilePath)
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{
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DESCryptoServiceProvider objDES = new DESCryptoServiceProvider();
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FileStream fout = new FileStream(outXmlFilePath, FileMode.OpenOrCreate, FileAccess.Write);
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//用指定的 Key 和初始化向量 (IV) 创建对称数据加密标准 (DES) 加密器对象
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CryptoStream objCryptoStream = new CryptoStream(fout, objDES.CreateEncryptor(DESKey, DESIV), CryptoStreamMode.Write);
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StreamWriter objStreamWriter = new StreamWriter(objCryptoStream);
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XmlSerializer objXmlSer = new XmlSerializer(typeof(DataSet));
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objXmlSer.Serialize(objStreamWriter, objDataSet);
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objStreamWriter.Close();
41![](/Images/OutliningIndicators/InBlock.gif)
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}
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public static DataSet DecryptDataSetFromXml(string inXmlFilePath)
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{
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DESCryptoServiceProvider objDES = new DESCryptoServiceProvider();
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FileStream fin = new FileStream(inXmlFilePath, FileMode.Open , FileAccess.Read );
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//用指定的 Key 和初始化向量 (IV) 创建对称数据加密标准 (DES) 加密器对象
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CryptoStream objCryptoStream = new CryptoStream(fin, objDES.CreateDecryptor(DESKey, DESIV), CryptoStreamMode.Read);
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TextReader objTxrReader = new StreamReader(objCryptoStream);
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XmlSerializer objXmlSer = new XmlSerializer(typeof(DataSet));
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DataSet ds = (DataSet)objXmlSer.Deserialize(objTxrReader);
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return ds;
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}
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}
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}
56![](/Images/OutliningIndicators/None.gif)
小结:关于对称加密算法,大家可以参考微软的资料和网上的资料,这里就不多做解释了。下面是源代码文件,里面还包含有字符串和文件加密的方法,当然那些是别人的代码。![](/Images/OutliningIndicators/None.gif)
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/Files/zjzkiss/ClsDoCode.rar