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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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');
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namespace Util.
Security');
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{');
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public class Impersonator: IDisposable
');
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{');
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#region Constants');
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private const Int32 IMPERSONATION_LEVEL =
2;
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private const Int32 LOGON32_PROVIDER_DEFAULT =
0;
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private const Int32 LOGON32_LOGON_INTERACTIVE =
3;
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#endregion');
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');
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#region Members');
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private WindowsImpersonationContext _nusr =
null;
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#endregion');
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');
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#region WinApi');
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[DllImport
("kernel32.dll", CharSet=CharSet.
Auto)]');
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public extern static Boolean CloseHandle
(');
document.write(' IntPtr Handle
);
');
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');
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[DllImport
("advapi32.dll", CharSet=CharSet.
Auto, SetLastError=
true)]');
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public extern static Boolean DuplicateToken
(');
document.write(' IntPtr ExistingTokenHandle,
');
document.write(' Int32 SECURITY_IMPERSONATION_LEVEL,
');
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ref IntPtr DuplicateTokenHandle
);
');
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');
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[DllImport
("advapi32.dll", SetLastError=
true)]');
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public static extern bool LogonUser
(');
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String lpszUsername,
');
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String lpszDomain,
');
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String lpszPassword,
');
document.write(' Int32 dwLogonType,
');
document.write(' Int32 dwLogonProvider,
');
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ref IntPtr phToken
);
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#endregion');
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');
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#region Methods');
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#region Constructors');
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public Impersonator
(');
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String user,
');
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String password
):
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this(');
document.write(' Environment.
MachineName,
');
document.write(' user,
');
document.write(' password
)');
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{');
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}');
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');
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public Impersonator
(');
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String domain,
');
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String user,
');
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String password
)');
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{');
document.write(' _nusr = GetImpersonatedUser
(');
document.write(' domain,
');
document.write(' user,
');
document.write(' password
);
');
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}');
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#endregion');
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');
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#region Destructor');
document.write(' ~Impersonator
()');
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{');
document.write(' Dispose
();
');
document.write(' GC.
SuppressFinalize(this);
');
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}');
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#endregion');
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');
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#region Interface');
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public void Dispose
()');
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{');
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if(_nusr !=
null)');
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{');
document.write(' _nusr.
Undo();
');
document.write(' _nusr =
null;
');
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}');
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}');
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#endregion');
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');
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#region Implementation');
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private WindowsImpersonationContext GetImpersonatedUser
(');
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String domain,
');
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String user,
');
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String password
)');
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{');
document.write(' IntPtr exst =
new IntPtr
(0);
');
document.write(' IntPtr dupl =
new IntPtr
(0);
');
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');
document.write(' Boolean resl =
true;
');
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');
document.write(' WindowsIdentity widt =
null;
');
document.write(' WindowsImpersonationContext wctx =
null;
');
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');
document.write(' exst = IntPtr.
Zero;
');
document.write(' dupl = IntPtr.
Zero;
');
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');
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try');
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{');
document.write(' resl = LogonUser
(');
document.write(' user,
');
document.write(' domain,
');
document.write(' password,
');
document.write(' LOGON32_LOGON_INTERACTIVE,
');
document.write(' LOGON32_PROVIDER_DEFAULT,
');
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ref exst
);
');
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');
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if (!resl
)');
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{');
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throw new System.
ComponentModel.
Win32Exception(');
document.write(' Marshal.
GetLastWin32Error());
');
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}');
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');
document.write(' resl = DuplicateToken
(');
document.write(' exst,
');
document.write(' IMPERSONATION_LEVEL,
');
document.write('
ref dupl
);
');
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');
document.write('
if (!resl
)');
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{');
document.write(' CloseHandle
(exst
);
');
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throw new System.
ComponentModel.
Win32Exception(');
document.write(' Marshal.
GetLastWin32Error());
');
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}');
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else');
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{');
document.write(' widt =
new WindowsIdentity
(dupl
);
');
document.write(' wctx = widt.
Impersonate();
');
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');
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return wctx;
');
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}');
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}');
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catch(Exception ex
)');
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{');
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String msgs = ex.
Message;
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return null;
');
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}');
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finally');
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{');
document.write('
if (exst!= IntPtr.
Zero)');
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{');
document.write(' CloseHandle
(exst
);
');
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}');
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if (dupl != IntPtr.
Zero)');
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{');
document.write(' CloseHandle
(dupl
);
');
document.write('
}');
document.write('
}');
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}');
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#endregion');
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#endregion');
document.write('
}');
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}');
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