/// <summary>
/// Impersonates the specified user account.
/// </summary>
/// <param name="userName">Name of the user.</param>
/// <param name="domainName">Name of the domain.</param>
/// <param name="password">The password. <see cref="System.String"/></param>
/// <param name="logonType">Type of the logon.</param>
/// <param name="logonProvider">The logon provider. <see cref="Mit.Sharepoint.WebParts.EventLogQuery.Network.LogonProvider"/></param>
private void Impersonate(string NetworkLocation, string userName, string domainName, string password, LogonType logonType, LogonProvider logonProvider)
{
try
{
UndoImpersonation();
/*
* if (userName.Contains("\\") || userName.Contains("/"))
* {
* string[] tokens = userName.Split(new char[] { '\\', '/' });
* if (tokens.Length != 2) throw new Exception("Expected user name to contain at most one / or \\ character. User name: " + userName);
* if (domainName.Trim().Length != 0) throw new Exception("Cannot specify a / or \\ in user name when domain is also given. User name: " + userName + " Domain: " + domainName);
* domainName = tokens[0];
* userName = tokens[1];
* }
*/
IntPtr logonToken = IntPtr.Zero;
IntPtr logonTokenDuplicate = IntPtr.Zero;
try
{
// revert to the application pool identity, saving the identity of the current requestor
_wic = WindowsIdentity.Impersonate(IntPtr.Zero);
// do logon & impersonate
if (Win32NativeMethods.LogonUser(userName,
domainName,
password,
(int)logonType,
(int)logonProvider,
ref logonToken) != 0)
{
if (Win32NativeMethods.DuplicateToken(logonToken, (int)ImpersonationLevel.SecurityImpersonation, ref logonTokenDuplicate) != 0)
{
var wi = new WindowsIdentity(logonTokenDuplicate);
wi.Impersonate(); // discard the returned identity context (which is the context of the application pool)
}
else
{
ThrowSpecificException();
}
}
else
{
ThrowSpecificException();
}
}
finally
{
if (logonToken != IntPtr.Zero)
{
Win32NativeMethods.CloseHandle(logonToken);
}
if (logonTokenDuplicate != IntPtr.Zero)
{
Win32NativeMethods.CloseHandle(logonTokenDuplicate);
}
}
}
catch (Exception ex)
{
throw new IOException("Unable to access path:\n" + NetworkLocation + "\nAs username: "******"\nOn domain: " + domainName + "\nError: " + ex.ToString());
}
}
