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85 lines
3.7 KiB
85 lines
3.7 KiB
/* Copyright (C) 2008-2016 Peter Palotas, Jeffrey Jangli, Alexandr Normuradov
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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namespace Alphaleonis.Win32.Security
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{
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/// <summary>Used to enable one or more privileges. The privileges specified will be enabled during the lifetime of the instance. Users create an instance of this object in a <c>using</c> statement to ensure that it is properly disposed when the elevated privileges are no longer needed.</summary>
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public sealed class PrivilegeEnabler : IDisposable
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{
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#region PrivilegeEnabler
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private readonly List<InternalPrivilegeEnabler> _enabledPrivileges = new List<InternalPrivilegeEnabler>();
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/// <summary>Initializes a new instance of the <see cref="PrivilegeEnabler"/> class.
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/// This will enable the privileges specified (unless already enabled), and ensure that they are disabled again when
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/// the object is disposed. (Any privileges already enabled will not be disabled).
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/// </summary>
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/// <param name="privilege">The privilege to enable.</param>
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/// <param name="privileges">Additional privileges to enable.</param>
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public PrivilegeEnabler(Privilege privilege, params Privilege[] privileges)
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{
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_enabledPrivileges.Add(new InternalPrivilegeEnabler(privilege));
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if (privileges != null)
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foreach (Privilege priv in privileges)
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_enabledPrivileges.Add(new InternalPrivilegeEnabler(priv));
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}
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#endregion // PrivilegeEnabler
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#region Dispose
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/// <summary>Makes sure any privileges enabled by this instance are disabled.</summary>
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[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes")]
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public void Dispose()
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{
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foreach (InternalPrivilegeEnabler t in _enabledPrivileges)
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{
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try
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{
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t.Dispose();
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}
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catch
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{
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// We ignore any exceptions here
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}
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}
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}
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#endregion // Dispose
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#region EnabledPrivileges
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/// <summary>Gets the enabled privileges. Note that this might not contain all privileges specified to the constructor. Only the privileges actually enabled by this instance is returned.</summary>
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/// <value>The enabled privileges.</value>
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public IEnumerable<Privilege> EnabledPrivileges
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{
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get { return from priv in _enabledPrivileges where priv.EnabledPrivilege != null select priv.EnabledPrivilege; }
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}
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#endregion // EnabledPrivileges
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}
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}
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