.net下模拟不同身份登陆以获取不同权限

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.net下模拟不同身份登陆以获取不同权限??
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作者:佚名?时间: 2004 - 04 - 16 ? 09 : 14 ?出处:互连网?责编:chinaitpower??
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??????????????摘要：.net下模拟不同身份登陆以获取不同权限?
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不管是asp.net、web?service还是window?service，程序运行的时候只有本地计算机的部分权限，有时候需要更大的权限，比如读写某台服务器或域中的一台计算机上的文件等，这就需要更大的权限，比如域帐户权限。?
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通过获取不同身份的WindowsImpersonationContext对象，可以模拟不同用户登陆，请看我生成的NetworkSecurity类的?
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public ? static ?WindowsImpersonationContext?ImpersonateUser( string ?strDomain,?
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string ?strLogin,?
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string ?strPwd,?
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LogonType?logonType,?
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LogonProvider?logonProvider)；?
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附NetworkSecurity.cs源代码如下：?
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/**/ /*?
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*?Author?:?TongWei?
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*?Date?:?2005-1-25?
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*?Rights?:?China?Netwave?Inc.@2005?
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*/ ?
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using ?System;?
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using ?System.Runtime.InteropServices;?
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using ?System.Security.Principal;?
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using ?System.Security.Permissions;?
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namespace ?CNW.OMP.Common.Utility?
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{?
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public?enum?LogonType?:?int?
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{?
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/**////?<summary>?
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///?This?logon?type?is?intended?for?users?who?will?be?interactively?using?the?computer,?such?as?a?user?
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///?being?logged?on?by?a?terminal?server,?remote?shell,?or?similar?process.?This?logon?type?has?the?
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///?additional?expense?of?caching?logon?information?for?disconnected?operation,?and?is?therefore?
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///?inappropriate?for?some?client/server?applications,?such?as?a?mail?server.?
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///?</summary>?
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LOGON32_LOGON_INTERACTIVE?=?2,?
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/**////?<summary>?
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///?This?logon?type?is?intended?for?high?performance?servers?to?authenticate?clear?text?passwords.?
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///?The?LogonUser?function?does?not?cache?credentials?for?this?logon?type.?
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///?</summary>?
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LOGON32_LOGON_NETWORK?=?3,?
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/**////?<summary>?
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///?This?logon?type?is?intended?for?batch?servers,?where?processes?may?be?executing?on?behalf?of?a?user?
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///?without?their?direct?intervention;?or?for?higher?performance?servers?that?process?many?clear-text?
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///?authentication?attempts?at?a?time,?such?as?mail?or?web?servers.?The?LogonUser?function?does?not?cache?
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///?credentials?for?this?logon?type.?
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///?</summary>?
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LOGON32_LOGON_BATCH?=?4,?
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/**////?<summary>?
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///?Indicates?a?service-type?logon.?The?account?provided?must?have?the?service?privilege?enabled.?
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///?</summary>?
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LOGON32_LOGON_SERVICE?=?5,?
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/**////?<summary>?
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///?This?logon?type?is?intended?for?GINA?DLLs?logging?on?users?who?will?be?interactively?using?the?computer.?
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///?This?logon?type?allows?a?unique?audit?record?to?be?generated?that?shows?when?the?workstation?was?unlocked.?
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///?</summary>?
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LOGON32_LOGON_UNLOCK?=?7,?
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/**////?<summary>?
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///?Windows?XP/2000:?This?logon?type?preserves?the?name?and?password?in?the?authentication?packages,?
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///?allowing?the?server?to?make?connections?to?other?network?servers?while?impersonating?the?client.?
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///?This?allows?a?server?to?accept?clear?text?credentials?from?a?client,?call?LogonUser,?verify?that?
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///?the?user?can?access?the?system?across?the?network,?and?still?communicate?with?other?servers.?
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///?</summary>?
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LOGON32_LOGON_NETWORK_CLEARTEXT?=?8,?
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/**////?<summary>?
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///?Windows?XP/2000:?This?logon?type?allows?the?caller?to?clone?its?current?token?and?specify?new?credentials?
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///?for?outbound?connections.?The?new?logon?session?has?the?same?local?identity,?but?uses?different?credentials?
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///?for?other?network?connections.?
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///?This?logon?type?is?supported?only?by?the?LOGON32_PROVIDER_WINNT50?logon?provider.?
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///?</summary>?
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LOGON32_LOGON_NEW_CREDENTIALS?=?9?
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};?
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public?enum?LogonProvider?:?int?
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{?
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/**////?<summary>?
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///?Use?the?standard?logon?provider?for?the?system.?The?default?security?provider?is?NTLM.?
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///?Windows?XP:?The?default?provider?is?negotiate,?unless?you?pass?NULL?for?the?domain?name?and?
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///?the?user?name?is?not?in?UPN?format.?In?this?case?the?default?provider?is?NTLM.?
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///?</summary>?
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LOGON32_PROVIDER_DEFAULT?=?0,?
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/**////?<summary>?
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///?Use?the?Windows?NT?3.5?logon?provider.?
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///?</summary>?
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LOGON32_PROVIDER_WINNT35?=?1,?
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/**////?<summary>?
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///?Use?the?NTLM?logon?provider.?
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///?</summary>?
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LOGON32_PROVIDER_WINNT40?=?2,?
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/**////?<summary>?
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///?Windows?XP/2000:?Use?the?negotiate?logon?provider.?
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///?</summary>?
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LOGON32_PROVIDER_WINNT50?=?3?
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};?
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class?SecuUtil32?
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{?
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[DllImport("advapi32.dll",?SetLastError=true)]?
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public?static?extern?bool?LogonUser(String?lpszUsername,?String?lpszDomain,?String?lpszPassword,?
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int?dwLogonType,?int?dwLogonProvider,?ref?IntPtr?TokenHandle);?
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[DllImport("kernel32.dll",?CharSet=CharSet.Auto)]?
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public?extern?static?bool?CloseHandle(IntPtr?handle);?
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[DllImport("advapi32.dll",?CharSet=CharSet.Auto,?SetLastError=true)]?
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public?extern?static?bool?DuplicateToken(IntPtr?ExistingTokenHandle,?
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int?SECURITY_IMPERSONATION_LEVEL,?ref?IntPtr?DuplicateTokenHandle);?
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}?
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public?class?NetworkSecurity?
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{?
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public?NetworkSecurity()?
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{?
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//?
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//?TODO:?Add?constructor?logic?here?
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//?
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}?
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/**////?<summary>?
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///?The?ImpersonateUser?function?attempts?to?log?a?user?on?to?the?local?computer.?
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///?The?local?computer?is?the?computer?from?which?ImpersonateUser?was?called.?
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///?You?cannot?use?ImpersonateUser?to?log?on?to?a?remote?computer.?
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///?You?specify?the?user?with?a?user?name?and?domain,?and?authenticate?the?user?with?a?clear-text?password.?
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///?If?the?function?succeeds,?you?receive?a?handle?to?a?token?that?represents?the?logged-on?user.?
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///?You?can?then?use?this?token?handle?to?impersonate?the?specified?user,?or?in?most?cases,?
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///?to?create?a?process?running?in?the?context?of?the?specified?user.?
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///?</summary>?
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///?<param?name="strDomain">?
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///?specifies?the?name?of?the?domain?or?server?whose?account?database?contains?the?strLogin?account.?
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///?</param>?
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///?<param?name="strLogin">specifies?the?name?of?the?user.</param>?
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///?<param?name="strPwd">specifies?the?clear-text?password?for?the?user?account?specified?by?strLogin.</param>?
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///?<param?name="logonType">Specifies?the?type?of?logon?operation?to?perform.</param>?
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///?<param?name="logonProvider">Specifies?the?logon?provider.</param>?
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///?<example>?
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///?//Add?System.Security.dll?
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///?//using?System.Security.Principal;?
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///?
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///?string?strDomain=ConfigurationSettings.AppSettings["mSALoginDomainName"];?
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///?string?strUser=ConfigurationSettings.AppSettings["mSALoginDomainUser"];?
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///?string?strPassword=ConfigurationSettings.AppSettings["mSALoginDomainPassword"];?
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///?
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///?WindowsImpersonationContext?impContext?=?null;?
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///?try?
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///?{?
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///?impContext?=?NetworkSecurity.ImpersonateUser(strDomain,strUser,strPassword,?
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///?LogonType.LOGON32_LOGON_SERVICE,?
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///?LogonProvider.LOGON32_PROVIDER_DEFAULT);?
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///?}?
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///?catch?
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///?{?
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///?
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///?}?
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///?
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///?//work?under?this?logined?user?
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///?
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///?impContext.Undo();?
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///?</example>?
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///?<returns>?
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///?</returns>?
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public?static?WindowsImpersonationContext?ImpersonateUser(string?strDomain,?
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string?strLogin,?
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string?strPwd,?
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LogonType?logonType,?
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LogonProvider?logonProvider)?
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{?
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//?Initialize?tokens?
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IntPtr?tokenHandle?=?new?IntPtr(0);?
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IntPtr?dupeTokenHandle?=?new?IntPtr(0);?
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tokenHandle?=?IntPtr.Zero;?
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dupeTokenHandle?=?IntPtr.Zero;?
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//?If?domain?name?was?blank,?assume?local?machine?
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if?(strDomain?==?"")?
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strDomain?=?System.Environment.MachineName;?
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try?
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{?
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const?int?SecurityImpersonation?=?2;?
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//?Call?LogonUser?to?obtain?a?handle?to?an?access?token.?
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bool?returnValue?=?SecuUtil32.LogonUser(?
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strLogin,?
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strDomain,?
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strPwd,?
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(int)logonType,?
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(int)logonProvider,?
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ref?tokenHandle);?
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//?Did?impersonation?fail??
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if?(false?==?returnValue)?
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{?
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int?ret?=?Marshal.GetLastWin32Error();?
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//?Throw?the?exception?show?the?reason?why?LogonUser?failed?
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string?strErr?=?String.Format("LogonUser?failed?with?error?code?:?{0}",?ret);?
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throw?new?ApplicationException(strErr,?null);?
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}?
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//?Get?identity?before?impersonation?
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bool?retVal?=?SecuUtil32.DuplicateToken(tokenHandle,?SecurityImpersonation,?ref?dupeTokenHandle);?
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//?Did?DuplicateToken?fail??
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if?(false?==?retVal)?
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{?
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//?Close?existing?handle?
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SecuUtil32.CloseHandle(tokenHandle);?
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//?Throw?the?exception?show?the?reason?why?DuplicateToken?failed?
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throw?new?ApplicationException("Failed?to?duplicate?token",?null);?
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}?
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//?Create?new?identity?using?new?primary?token?
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//?The?token?that?is?passed?to?the?following?constructor?must?
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//?be?a?primary?token?in?order?to?use?it?for?impersonation.?
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WindowsIdentity?newId?=?new?WindowsIdentity(dupeTokenHandle);?
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WindowsImpersonationContext?impersonatedUser?=?newId.Impersonate();?
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return?impersonatedUser;?
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}?
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catch?(Exception?ex)?
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{?
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throw?new?ApplicationException(ex.Message,?ex);?
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}?
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finally?
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{?
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//?Close?handle?
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if?(tokenHandle?!=?IntPtr.Zero)?
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SecuUtil32.CloseHandle(tokenHandle);?
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if?(dupeTokenHandle?!=?IntPtr.Zero)?
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SecuUtil32.CloseHandle(dupeTokenHandle);?
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}?
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}?
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}?
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} ?
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?
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?
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<% @?Page?Language = " C# " %>

<% @?Import?Namespace? = ? " System.Web " ? %>

<% @?Import?Namespace? = ? " System.Web.Security " ? %>

<% @?Import?Namespace? = ? " System.Security.Principal " ? %>

<% @?Import?Namespace? = ? " System.Runtime.InteropServices " ? %>

< script?runat = server >

public ? const ? int ?LOGON32_LOGON_INTERACTIVE? = ? 2 ;

public ? const ? int ?LOGON32_PROVIDER_DEFAULT? = ? 0 ;

WindowsImpersonationContext?impersonationContext;

[DllImport( " advapi32.dll " )]

public ? static ? extern ? int ?LogonUserA(String?lpszUserName,

????String?lpszDomain,

????String?lpszPassword,

???? int ?dwLogonType,

???? int ?dwLogonProvider,

???? ref ?IntPtr?phToken);

[DllImport( " advapi32.dll " ,?CharSet = CharSet.Auto,?SetLastError = true )]

public ? static ? extern ? int ?DuplicateToken(IntPtr?hToken,

???? int ?impersonationLevel,

???? ref ?IntPtr?hNewToken);

[DllImport( " advapi32.dll " ,?SetLastError = true )]

public ? static ? extern ? bool ?RevertToSelf();

[DllImport( " kernel32.dll " ,?CharSet = CharSet.Auto)]

public ? static ? extern ?? bool ?CloseHandle(IntPtr?handle);

public ? void ?Page_Load(Object?s,?EventArgs?e)

{

????if(impersonateValidUser("username",?"domain",?"password"))

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{

????????//Insert?your?code?that?runs?under?the?security?context?of?a?specific?user?here.

????????undoImpersonation();

????}

????else

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{

????????//Your?impersonation?failed.?Therefore,?include?a?fail-safe?mechanism?here.

????}

}

private ? bool ?impersonateValidUser(String?userName,?String?domain,?String?password)

{

????WindowsIdentity?tempWindowsIdentity;

????IntPtr?token?=?IntPtr.Zero;

????IntPtr?tokenDuplicate?=?IntPtr.Zero;

????if(RevertToSelf())

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{

????????if(LogonUserA(userName,?domain,?password,?LOGON32_LOGON_INTERACTIVE,

????????????LOGON32_PROVIDER_DEFAULT,?ref?token)?!=?0)

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{

????????????if(DuplicateToken(token,?2,?ref?tokenDuplicate)?!=?0)

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{

????????????????tempWindowsIdentity?=?new?WindowsIdentity(tokenDuplicate);

????????????????impersonationContext?=?tempWindowsIdentity.Impersonate();

????????????????if?(impersonationContext?!=?null)

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{

????????????????????CloseHandle(token);

????????????????????CloseHandle(tokenDuplicate);

????????????????????return?true;

????????????????}

????????????}

????????}

????}

????if(token!=?IntPtr.Zero)

????????CloseHandle(token);

????if(tokenDuplicate!=IntPtr.Zero)

????????CloseHandle(tokenDuplicate);

????return?false;

}

private ? void ?undoImpersonation()

{

????impersonationContext.Undo();

}

</ script >