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From: Kirk on 8 Feb 2006 14:20
The following C# web service works fine until you uncomment the lines
setting UserName and Password. Then the process starts as the
specified user, but hangs in a suspended state. In fact, any
executable will exhibit this problem; it is not specific to whoami.exe.
This is with .NET 2.0, of course (1.1 does not support running a
process as a different user). This appears to be a bug. Can anyone
comment?

<%@ WebService Language="C#" Class="Kirk.ForkIt" %>

using System;
using System.IO;
using System.Collections;
using System.Security;
using System.Web.Services;
using System.Diagnostics;

namespace Kirk
{
public class ForkIt
{

[WebMethod]
public string Main()
{
Process p = new Process();
ProcessStartInfo pInfo = new
ProcessStartInfo(@"c:\windows\system32\whoami.exe");

SecureString password = new SecureString();
// set value for password here.
password.AppendChar('s');
password.AppendChar('e');
password.AppendChar('c');
password.AppendChar('r');
password.AppendChar('e');
password.AppendChar('t');

pInfo.UserName = "Administrator";
pInfo.Password = password;
pInfo.CreateNoWindow = true;
pInfo.UseShellExecute = false;
pInfo.RedirectStandardOutput = true;

p.StartInfo = pInfo;
p.Start();

String output = p.StandardOutput.ReadToEnd();
p.WaitForExit();

return output;
}
}
}

From: DKode on 8 Feb 2006 14:24
hmmm

maybe try putting the domain/computer name in front of the username:

pInfo.UserName = "MyComputer\Administrator";

not sure, i havent used this feature in 2.0 yet

From: Kirk on 8 Feb 2006 15:11
Thanks, but your suggestion doesn't help. There is a Domain member for
the ProcessStartInfo class, but setting that to the computer name
doesn't help. Anyway, the authentication is not an issue _in itself_
as I can see that the hung process is running as the specified user
(Administrator in this case). I can get any domain account to run the
process, it's just that the process hangs -- any process.

From: Willy Denoyette [MVP] on 8 Feb 2006 15:44
What OS are you running this on and Who's the callers identity, that is the
identity of the asp.net process or the impersonating identity if
impersonation is active?

Willy.

"Kirk" <kirk.martinez(a)gmail.com> wrote in message
news:1139426415.828865.323770(a)g14g2000cwa.googlegroups.com...
| The following C# web service works fine until you uncomment the lines
| setting UserName and Password. Then the process starts as the
| specified user, but hangs in a suspended state. In fact, any
| executable will exhibit this problem; it is not specific to whoami.exe.
| This is with .NET 2.0, of course (1.1 does not support running a
| process as a different user). This appears to be a bug. Can anyone
| comment?
|
| <%@ WebService Language="C#" Class="Kirk.ForkIt" %>
|
| using System;
| using System.IO;
| using System.Collections;
| using System.Security;
| using System.Web.Services;
| using System.Diagnostics;
|
| namespace Kirk
| {
| public class ForkIt
| {
|
| [WebMethod]
| public string Main()
| {
| Process p = new Process();
| ProcessStartInfo pInfo = new
| ProcessStartInfo(@"c:\windows\system32\whoami.exe");
|
| SecureString password = new SecureString();
| // set value for password here.
| password.AppendChar('s');
| password.AppendChar('e');
| password.AppendChar('c');
| password.AppendChar('r');
| password.AppendChar('e');
| password.AppendChar('t');
|
| pInfo.UserName = "Administrator";
| pInfo.Password = password;
| pInfo.CreateNoWindow = true;
| pInfo.UseShellExecute = false;
| pInfo.RedirectStandardOutput = true;
|
| p.StartInfo = pInfo;
| p.Start();
|
| String output = p.StandardOutput.ReadToEnd();
| p.WaitForExit();
|
| return output;
| }
| }
| }
|


From: Kirk on 9 Feb 2006 02:54
OS is Windows 2003 Server. I run IE6 and invoke the Web Service via
the Invoke button from the default generator for .asmx files. The asmx
file is also local to the web server; everything is on the same
machine.

I have impersonate set to true in my
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\CONFIG\web.config file,
and I am logged in as a domain user (DOMAIN/SOFTINFO, same DOMAIN that
the server is in) with Administrative priviledges. When I invoke the
service, Environment.DomainName="SW-WEB"
Environment.UserName="IUSR_SWDEVL2" (SW-WEB is the name of the machine,
SWDEVL2 was the previous name of the machine).

If I remove impersonation from my web.config, the service throws an
exception...Access is Denied. Environment.DomainName="DOMAIN"
Environment.UserName="SYSTEM". Not sure what SYSTEM really means, but
I suppose it doesn't have permission to create processes. Anyway,
that's why I enabled impersonation in the first place (plus it's how my
old ASP stuff works and I like it for our intranet).

I'm no expert, but my understanding is that impersonation will run my
Web Service thread as the client user, however, when my process forks,
it will run as the IIS user. I'm a bit confused, though, becuase I
would expect UserName to be "SOFTINFO" for the case where I have
impersonation turned on. Perhaps you can clarify this.

The Web Service is inline, and running from an Application Pool with
Identity set to Local System. I also set it to Network Service and
witness the same behavior. If I set it to Local Service I get the
following error when I Invoke the Web Service (this is not a problem
for me, but it might be a clue, I don't know):

System.InvalidOperationException: Unable to generate a temporary class
(result=1).
error CS2001: Source file 'C:\WINDOWS\TEMP\qa0vmnpy.0.cs' could not be
found
error CS2008: No inputs specified

at System.Xml.Serialization.Compiler.Compile(Assembly parent, String
ns, CompilerParameters parameters, Evidence evidence)
at
System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[]
xmlMappings, Type[] types, String defaultNamespace, Evidence evidence,
CompilerParameters parameters, Assembly assembly, Hashtable assemblies)
at System.Xml.Serialization.TempAssembly..ctor(XmlMapping[]
xmlMappings, Type[] types, String defaultNamespace, String location,
Evidence evidence)
at System.Xml.Serialization.XmlSerializer.FromMappings(XmlMapping[]
mappings, Evidence evidence)
at
System.Web.Services.Protocols.XmlReturn.GetInitializers(LogicalMethodInfo[]
methodInfos)
at
System.Web.Services.Protocols.XmlReturnWriter.GetInitializers(LogicalMethodInfo[]
methodInfos)
at System.Web.Services.Protocols.MimeFormatter.GetInitializers(Type
type, LogicalMethodInfo[] methodInfos)
at System.Web.Services.Protocols.HttpServerType..ctor(Type type)
at System.Web.Services.Protocols.HttpServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type
type, HttpContext context, HttpRequest request, HttpResponse response,
Boolean& abortProcessing)

Thanks,
Kirk

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