c# xml文件加密解密 复制即用 所有细节都有

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1、//要在工程里添加System.Security的引用集usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Xml;//XMLNamespaceusingSystem.Security.Cryptography;usingSystem.Security.Cryptography.Xml;//xmlencryptionnamespaceusingSystem.Windows.Form

2、s;//Applicationnamespacenamespacemyown{classencryption_and_dcryption{//xml加密方法privatevoidEncrypt(XmlDocumentDoc,stringElementName,SymmetricAlgorithmKey){XmlElementelementToEncrypt=Doc.GetElementsByTagName(ElementName)[0]asXmlElement;EncryptedXmleXml=newEnc

3、ryptedXml();byte[]encryptedElement=eXml.EncryptData(elementToEncrypt,Key,false);//最后一个参数不能为空????EncryptedDataedElement=newEncryptedData();edElement.Type=EncryptedXml.XmlEncElementUrl;stringencryptionMethod=null;if(KeyisTripleDES){encryptionMethod=Encrypted

4、Xml.XmlEncTripleDESUrl;}elseif(KeyisDES){encryptionMethod=EncryptedXml.XmlEncDESUrl;}if(KeyisRijndael){switch(Key.KeySize){case128:encryptionMethod=EncryptedXml.XmlEncAES128Url;break;case192:encryptionMethod=EncryptedXml.XmlEncAES192Url;break;case256:encry

5、ptionMethod=EncryptedXml.XmlEncAES256Url;break;}}edElement.EncryptionMethod=newEncryptionMethod(encryptionMethod);edElement.CipherData.CipherValue=encryptedElement;EncryptedXml.ReplaceElement(elementToEncrypt,edElement,false);}//xml解密方法privatevoidDecrypt(X

6、mlDocumentDoc,SymmetricAlgorithmAlg){XmlElementencryptedElement=Doc.GetElementsByTagName("EncryptedData")[0]asXmlElement;EncryptedDataedElement=newEncryptedData();edElement.LoadXml(encryptedElement);EncryptedXmlexml=newEncryptedXml();byte[]rgbOutput=exml.D

7、ecryptData(edElement,Alg);exml.ReplaceData(encryptedElement,rgbOutput);}//对相应xml文件加密publicvoidfileEncryption(stringpresentuser){RijndaelManagedkey=newRijndaelManaged();//设置密钥:key为32位=数字或字母16个=汉字8个byte[]byteKey=Encoding.Unicode.GetBytes("1111111111111111");

8、//everyloadgettimeaskeykey.Key=byteKey;XmlDocumentxmlDoc=newXmlDocument();xmlDoc.PreserveWhitespace=true;xmlDoc.Load(Application.StartupPath+"\"+presentuser+".xml");//加载要加密的XML文件Encrypt(xmlDoc,"Save",key);//