Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / DataAccess / ADConnectionHelper.cs / 1 / ADConnectionHelper.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.DataAccess { using System.Net; using System.Diagnostics; using System.Web.Hosting; using System.Web.Security; using System.DirectoryServices; using System.DirectoryServices.Protocols; internal static class ActiveDirectoryConnectionHelper { internal static DirectoryEntryHolder GetDirectoryEntry(DirectoryInformation directoryInfo, string objectDN, bool revertImpersonation) { Debug.Assert ((objectDN != null) && (objectDN.Length != 0)); // // Get the adspath and create a directory entry holder // DirectoryEntryHolder holder = new DirectoryEntryHolder(new DirectoryEntry ( directoryInfo.GetADsPath(objectDN), directoryInfo.GetUsername(), directoryInfo.GetPassword(), directoryInfo.AuthenticationTypes)); // // If revertImpersonation is true, we need to revert // holder.Open(null, revertImpersonation); return holder; } } internal sealed class DirectoryEntryHolder { private ImpersonationContext ctx = null; private bool opened; private DirectoryEntry entry; internal DirectoryEntryHolder (DirectoryEntry entry) { Debug.Assert (entry != null); this.entry = entry; } internal void Open (HttpContext context, bool revertImpersonate) { if (opened) return; // Already opened // // Revert client impersonation if required // if (revertImpersonate) { ctx = new ApplicationImpersonationContext(); } else { ctx = null; } opened = true; // Open worked! } internal void Close () { if (!opened) // Not open! return; entry.Dispose(); RestoreImpersonation(); opened = false; } internal void RestoreImpersonation() { // Restore impersonation if (ctx != null) { ctx.Undo(); ctx = null; } } internal DirectoryEntry DirectoryEntry { get { return entry; } } } }
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