卢克奎宁的解决方案看起来不错，但只部分工作在我的ASP。NET MVC应用程序。在同一服务器上使用不同凭证的两个共享，我只能对第一个使用模拟。

WNetAddConnection2的问题还在于它在不同的windows版本上表现不同。这就是为什么我寻找替代品，并找到了LogonUser功能。这是我的代码，也工作在ASP。NET:

public sealed class WrappedImpersonationContext
{
    public enum LogonType : int
    {
        Interactive = 2,
        Network = 3,
        Batch = 4,
        Service = 5,
        Unlock = 7,
        NetworkClearText = 8,
        NewCredentials = 9
    }

    public enum LogonProvider : int
    {
        Default = 0,  // LOGON32_PROVIDER_DEFAULT
        WinNT35 = 1,
        WinNT40 = 2,  // Use the NTLM logon provider.
        WinNT50 = 3   // Use the negotiate logon provider.
    }

    [DllImport("advapi32.dll", EntryPoint = "LogonUserW", SetLastError = true, CharSet = CharSet.Unicode)]
    public static extern bool LogonUser(String lpszUsername, String lpszDomain,
        String lpszPassword, LogonType dwLogonType, LogonProvider dwLogonProvider, ref IntPtr phToken);

    [DllImport("kernel32.dll")]
    public extern static bool CloseHandle(IntPtr handle);

    private string _domain, _password, _username;
    private IntPtr _token;
    private WindowsImpersonationContext _context;

    private bool IsInContext
    {
        get { return _context != null; }
    }

    public WrappedImpersonationContext(string domain, string username, string password)
    {
        _domain = String.IsNullOrEmpty(domain) ? "." : domain;
        _username = username;
        _password = password;
    }

    // Changes the Windows identity of this thread. Make sure to always call Leave() at the end.
    [PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
    public void Enter()
    {
        if (IsInContext)
            return;

        _token = IntPtr.Zero;
        bool logonSuccessfull = LogonUser(_username, _domain, _password, LogonType.NewCredentials, LogonProvider.WinNT50, ref _token);
        if (!logonSuccessfull)
        {
            throw new Win32Exception(Marshal.GetLastWin32Error());
        }
        WindowsIdentity identity = new WindowsIdentity(_token);
        _context = identity.Impersonate();

        Debug.WriteLine(WindowsIdentity.GetCurrent().Name);
    }

    [PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
    public void Leave()
    {
        if (!IsInContext)
            return;

        _context.Undo();

        if (_token != IntPtr.Zero)
        {
            CloseHandle(_token);
        }
        _context = null;
    }
}

用法:

var impersonationContext = new WrappedImpersonationContext(Domain, Username, Password);
impersonationContext.Enter();

//do your stuff here

impersonationContext.Leave();

如果你不能创建一个本地有效的安全令牌，似乎你已经排除了所有选项栏Win32 API和WNetAddConnection*。

MSDN上关于WNet - PInvoke信息和连接到UNC路径的示例代码的大量信息:

http://www.pinvoke.net/default.aspx/mpr/WNetAddConnection2.html#

MSDN参考:

http://msdn.microsoft.com/en-us/library/aa385391 (VS.85) . aspx

卢克奎宁的解决方案看起来不错，但只部分工作在我的ASP。NET MVC应用程序。在同一服务器上使用不同凭证的两个共享，我只能对第一个使用模拟。

WNetAddConnection2的问题还在于它在不同的windows版本上表现不同。这就是为什么我寻找替代品，并找到了LogonUser功能。这是我的代码，也工作在ASP。NET:

public sealed class WrappedImpersonationContext
{
    public enum LogonType : int
    {
        Interactive = 2,
        Network = 3,
        Batch = 4,
        Service = 5,
        Unlock = 7,
        NetworkClearText = 8,
        NewCredentials = 9
    }

    public enum LogonProvider : int
    {
        Default = 0,  // LOGON32_PROVIDER_DEFAULT
        WinNT35 = 1,
        WinNT40 = 2,  // Use the NTLM logon provider.
        WinNT50 = 3   // Use the negotiate logon provider.
    }

    [DllImport("advapi32.dll", EntryPoint = "LogonUserW", SetLastError = true, CharSet = CharSet.Unicode)]
    public static extern bool LogonUser(String lpszUsername, String lpszDomain,
        String lpszPassword, LogonType dwLogonType, LogonProvider dwLogonProvider, ref IntPtr phToken);

    [DllImport("kernel32.dll")]
    public extern static bool CloseHandle(IntPtr handle);

    private string _domain, _password, _username;
    private IntPtr _token;
    private WindowsImpersonationContext _context;

    private bool IsInContext
    {
        get { return _context != null; }
    }

    public WrappedImpersonationContext(string domain, string username, string password)
    {
        _domain = String.IsNullOrEmpty(domain) ? "." : domain;
        _username = username;
        _password = password;
    }

    // Changes the Windows identity of this thread. Make sure to always call Leave() at the end.
    [PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
    public void Enter()
    {
        if (IsInContext)
            return;

        _token = IntPtr.Zero;
        bool logonSuccessfull = LogonUser(_username, _domain, _password, LogonType.NewCredentials, LogonProvider.WinNT50, ref _token);
        if (!logonSuccessfull)
        {
            throw new Win32Exception(Marshal.GetLastWin32Error());
        }
        WindowsIdentity identity = new WindowsIdentity(_token);
        _context = identity.Impersonate();

        Debug.WriteLine(WindowsIdentity.GetCurrent().Name);
    }

    [PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
    public void Leave()
    {
        if (!IsInContext)
            return;

        _context.Undo();

        if (_token != IntPtr.Zero)
        {
            CloseHandle(_token);
        }
        _context = null;
    }
}

用法:

var impersonationContext = new WrappedImpersonationContext(Domain, Username, Password);
impersonationContext.Enter();

//do your stuff here

impersonationContext.Leave();

也移植到f#使用FAKE

module NetworkShare

open System
open System.ComponentModel
open System.IO
open System.Net
open System.Runtime.InteropServices

type ResourceScope =
| Connected = 1
| GlobalNetwork = 2
| Remembered = 3
| Recent = 4
type ResourceType =
| Any = 0
| Disk = 1
| Print = 2
| Reserved = 8
type ResourceDisplayType =
| Generic = 0x0
| Domain = 0x01
| Server = 0x02
| Share = 0x03
| File = 0x04
| Group = 0x05
| Network = 0x06
| Root = 0x07
| Shareadmin = 0x08
| Directory = 0x09
| Tree = 0x0a
| Ndscontainer = 0x0b

//Uses of this construct may result in the generation of unverifiable .NET IL code.
#nowarn "9"
[<StructLayout(LayoutKind.Sequential)>]
type NetResource =
  struct
    val mutable Scope : ResourceScope
    val mutable ResourceType : ResourceType
    val mutable DisplayType : ResourceDisplayType
    val mutable Usage : int
    val mutable LocalName : string
    val mutable RemoteName : string
    val mutable Comment : string
    val mutable Provider : string
    new(name) = {
      // lets preset needed fields
      NetResource.Scope = ResourceScope.GlobalNetwork
      ResourceType = ResourceType.Disk
      DisplayType = ResourceDisplayType.Share
      Usage = 0
      LocalName = null
      RemoteName = name
      Comment = null
      Provider = null
    }
  end

type WNetConnection(networkName : string, credential : NetworkCredential) =
  [<Literal>]
  static let Mpr = "mpr.dll"
  [<DllImport(Mpr, EntryPoint = "WNetAddConnection2")>]
  static extern int connect(NetResource netResource, string password, string username, int flags)
  [<DllImport(Mpr, EntryPoint = "WNetCancelConnection2")>]
  static extern int disconnect(string name, int flags, bool force)

  let mutable disposed = false;

  do
    let userName = if String.IsNullOrWhiteSpace credential.Domain
                   then credential.UserName
                   else credential.Domain + "\\" + credential.UserName
    let resource = new NetResource(networkName)

    let result = connect(resource, credential.Password, userName, 0)

    if result <> 0 then
      let msg = "Error connecting to remote share " + networkName
      new Win32Exception(result, msg)
      |> raise

  let cleanup(disposing:bool) =
    if not disposed then
      disposed <- true
      if disposing then () // TODO dispose managed resources here
      disconnect(networkName, 0, true) |> ignore

  interface IDisposable with
    member __.Dispose() =
      disconnect(networkName, 0, true) |> ignore
      GC.SuppressFinalize(__)

  override __.Finalize() = cleanup(false)

type CopyPath =
  | RemotePath of string * NetworkCredential
  | LocalPath of string

let createDisposable() =
  {
    new IDisposable with
      member __.Dispose() = ()
  }

let copyFile overwrite destPath srcPath : unit =
  use _srcConn =
    match srcPath with
    | RemotePath(path, credential) -> new WNetConnection(path, credential) :> IDisposable
    | LocalPath(_) -> createDisposable()
  use _destConn =
    match destPath with
    | RemotePath(path, credential) -> new WNetConnection(path, credential) :> IDisposable
    | LocalPath(_) -> createDisposable()
  match srcPath, destPath with
  | RemotePath(src, _), RemotePath(dest, _)
  | LocalPath(src), RemotePath(dest, _)
  | RemotePath(src, _), LocalPath(dest)
  | LocalPath(src), LocalPath(dest) ->
    if FileInfo(src).Exists |> not then
      failwith ("Source file not found: " + src)
    let destFilePath =
      if DirectoryInfo(dest).Exists then Path.Combine(dest, Path.GetFileName src)
      else dest
    File.Copy(src, destFilePath, overwrite)

let rec copyDir copySubDirs filePattern destPath srcPath =
  use _srcConn =
    match srcPath with
    | RemotePath(path, credential) -> new WNetConnection(path, credential) :> IDisposable
    | LocalPath(_) -> createDisposable()
  use _destConn =
    match destPath with
    | RemotePath(path, credential) -> new WNetConnection(path, credential) :> IDisposable
    | LocalPath(_) -> createDisposable()
  match srcPath, destPath with
  | RemotePath(src, _), RemotePath(dest, _)
  | LocalPath(src), RemotePath(dest, _)
  | RemotePath(src, _), LocalPath(dest)
  | LocalPath(src), LocalPath(dest) ->
    let dir = DirectoryInfo(src)
    if dir.Exists |> not then
      failwith ("Source directory not found: " + src)

    let dirs = dir.GetDirectories()
    if Directory.Exists(dest) |> not then
      Directory.CreateDirectory(dest) |> ignore

    let files = dir.GetFiles(filePattern)
    for file in files do
      let tempPath = Path.Combine(dest, file.Name)
      file.CopyTo(tempPath, false) |> ignore

    if copySubDirs then
      for subdir in dirs do
        let subdirSrc =
          match srcPath with
          | RemotePath(_, credential) -> RemotePath(Path.Combine(dest, subdir.Name), credential)
          | LocalPath(_) -> LocalPath(Path.Combine(dest, subdir.Name))
        let subdirDest =
          match destPath with
          | RemotePath(_, credential) -> RemotePath(subdir.FullName, credential)
          | LocalPath(_) -> LocalPath(subdir.FullName)
        copyDir copySubDirs filePattern subdirDest subdirSrc

您可以更改线程标识，或者P/Invoke WNetAddConnection2。我更喜欢后者，因为我有时需要为不同的位置维护多个凭证。我把它包装成一个IDisposable，然后调用WNetCancelConnection2来删除信用(避免多个用户名错误):

using (new NetworkConnection(@"\\server\read", readCredentials))
using (new NetworkConnection(@"\\server2\write", writeCredentials)) {
   File.Copy(@"\\server\read\file", @"\\server2\write\file");
}

好吧……我可以回应…

免责声明:我刚刚(又)一天工作了18个多小时。我老了，健忘了。我不会拼写。我的注意力持续时间很短，所以我最好快速反应。: -)

问题:

是否可以将线程主体更改为在本地机器上没有帐户的用户?

答:

是的，您可以更改线程主体，即使您使用的凭据没有在本地定义或在“林中”之外。

我刚刚在尝试从服务使用NTLM身份验证连接到SQL服务器时遇到了这个问题。此调用使用与流程关联的凭据，这意味着在进行模拟之前需要通过本地帐户或域帐户进行身份验证。之类的……

但是…

调用属性为????的LogonUser(..)_NEW_CREDENTIALS将返回一个安全令牌，而不尝试验证凭据。酷. .不必在“森林”中定义帐户。获得令牌后，您可能必须调用DuplicateToken()，并使用选项启用模拟，从而生成一个新的令牌。现在调用SetThreadToken(NULL, token);(可能是&token?)..调用ImpersonateLoggedonUser(令牌);可能是必需的，但我不这么认为。查一下…

做你该做的。

调用RevertToSelf()如果你调用了ImpersonateLoggedonUser()然后SetThreadToken(NULL, NULL);(我认为…然后在创建的句柄上使用CloseHandle() ..

没有保证，但这对我很有效……这是在我的头顶(就像我的头发)，我不会拼写!!