Lidarr/NzbDrone.Common/SecurityProvider.cs

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C#
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using System;
using System.Diagnostics;
using System.Linq;
using System.Security.Principal;
using NLog;
using NetFwTypeLib;
namespace NzbDrone.Common
{
public class SecurityProvider
{
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private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
private readonly ConfigFileProvider _configFileProvider;
private readonly EnvironmentProvider _environmentProvider;
private readonly ProcessProvider _processProvider;
public SecurityProvider(ConfigFileProvider configFileProvider, EnvironmentProvider environmentProvider,
ProcessProvider processProvider)
{
_configFileProvider = configFileProvider;
_environmentProvider = environmentProvider;
_processProvider = processProvider;
}
public SecurityProvider()
{
}
public virtual void MakeAccessible()
{
if (!IsCurrentUserAdmin())
{
Logger.Trace("User is not an admin, skipping.");
return;
}
int port = 0;
if (IsFirewallEnabled())
{
if(IsNzbDronePortOpen())
{
Logger.Trace("NzbDrone port is already open, skipping.");
return;
}
//Close any old ports
port = CloseFirewallPort();
//Open the new port
OpenFirewallPort(_configFileProvider.Port);
}
//Skip Url Register if not Vista or 7
if (_environmentProvider.GetOsVersion().Major < 6)
return;
//Unregister Url (if port != 0)
if (port != 0)
UnregisterUrl(port);
//Register Url
RegisterUrl(_configFileProvider.Port);
}
public virtual bool IsCurrentUserAdmin()
{
try
{
var principal = new WindowsPrincipal(WindowsIdentity.GetCurrent());
return principal.IsInRole(WindowsBuiltInRole.Administrator);
}
catch(Exception ex)
{
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Logger.WarnException("Error checking if the current user is an administrator.", ex);
return false;
}
}
public virtual bool IsNzbDronePortOpen()
{
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try
{
var netFwMgrType = Type.GetTypeFromProgID("HNetCfg.FwMgr", false);
var mgr = (INetFwMgr)Activator.CreateInstance(netFwMgrType);
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if (!mgr.LocalPolicy.CurrentProfile.FirewallEnabled)
return false;
var ports = mgr.LocalPolicy.CurrentProfile.GloballyOpenPorts;
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foreach (INetFwOpenPort p in ports)
{
if (p.Port == _configFileProvider.Port)
return true;
}
}
catch(Exception ex)
{
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Logger.WarnException("Failed to check for open port in firewall", ex);
}
return false;
}
private bool OpenFirewallPort(int portNumber)
{
try
{
var type = Type.GetTypeFromProgID("HNetCfg.FWOpenPort", false);
var port = Activator.CreateInstance(type) as INetFwOpenPort;
port.Port = portNumber;
port.Name = "NzbDrone";
port.Protocol = NET_FW_IP_PROTOCOL_.NET_FW_IP_PROTOCOL_TCP;
port.Enabled = true;
var netFwMgrType = Type.GetTypeFromProgID("HNetCfg.FwMgr", false);
var mgr = (INetFwMgr)Activator.CreateInstance(netFwMgrType);
var ports = mgr.LocalPolicy.CurrentProfile.GloballyOpenPorts;
ports.Add(port);
return true;
}
catch(Exception ex)
{
Logger.WarnException("Failed to open port in firewall for NzbDrone " + portNumber, ex);
return false;
}
}
private int CloseFirewallPort()
{
try
{
var netFwMgrType = Type.GetTypeFromProgID("HNetCfg.FwMgr", false);
var mgr = (INetFwMgr)Activator.CreateInstance(netFwMgrType);
var ports = mgr.LocalPolicy.CurrentProfile.GloballyOpenPorts;
var portNumber = 8989;
foreach (INetFwOpenPort p in ports)
{
if (p.Name == "NzbDrone")
{
portNumber = p.Port;
break;
}
}
if (portNumber != _configFileProvider.Port)
{
ports.Remove(portNumber, NET_FW_IP_PROTOCOL_.NET_FW_IP_PROTOCOL_TCP);
return portNumber;
}
}
catch(Exception ex)
{
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Logger.WarnException("Failed to close port in firewall for NzbDrone", ex);
}
return 0;
}
private bool IsFirewallEnabled()
{
try
{
var netFwMgrType = Type.GetTypeFromProgID("HNetCfg.FwMgr", false);
var mgr = (INetFwMgr)Activator.CreateInstance(netFwMgrType);
return mgr.LocalPolicy.CurrentProfile.FirewallEnabled;
}
catch(Exception ex)
{
Logger.WarnException("Failed to check if the firewall is enabled", ex);
return false;
}
}
private bool RegisterUrl(int portNumber)
{
try
{
var startInfo = new ProcessStartInfo()
{
FileName = "netsh.exe",
Arguments = string.Format("http add urlacl http://*:{0}/ user=EVERYONE", portNumber)
};
var process = _processProvider.Start(startInfo);
process.WaitForExit(5000);
return true;
}
catch(Exception ex)
{
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Logger.WarnException("Error registering URL", ex);
}
return false;
}
private bool UnregisterUrl(int portNumber)
{
try
{
var startInfo = new ProcessStartInfo()
{
FileName = "netsh.exe",
Arguments = string.Format("http delete urlacl http://*:{0}/", portNumber)
};
var process = _processProvider.Start(startInfo);
process.WaitForExit(5000);
return true;
}
catch (Exception ex)
{
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Logger.WarnException("Error registering URL", ex);
}
return false;
}
}
}