Re: Windows authentication for web service client??

I think you can try and get the login user's credential from teh current
thread if you have impersonate = true.
and pass it to the web service call.


"Keith Elder" <keith@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:PO-dnYjWFbFr9vnfRVn-vQ@xxxxxxxxxxxxxx
> If you are posting to WEBDAV it is my understanding that you cannot use
> Integrated authentication since you HAVE to pass it the username and the
> password in the network credentials. I was going to try to write some
> information to user's calendars and saw several articles on doing it via
> WEBDAV. However, you have to ask them for their password and pass it
> along. This makes it totally useless as far as I am concerned.
>
> If someone knows a way to not have to pass the password through that
> would be great but I haven't seen anything on how to do it anywhere.
>
> -Keith
>
>
> solex wrote:
> > Kevin,
> >
> > I appreciate your response.
> >
> > I guess what I am saying here is that it is not working as advertised.
I
> > must put together a sample example, but for some reason the users
> > credentials are lost when making the WebDAV request. I get a 401
> > unauthorized error.
> >
> > Thanks,
> > Dan
> >
> >
> >
> >
> > "Kevin Yu" <koo9@xxxxxxxxxxx> wrote in message
> > news:eQY0VXERFHA.4028@xxxxxxxxxxxxxxxxxxxxxxx
> >
> >>Dan
> >>
> >>The bottom line is when enable integrated windows authentication for a
> >>service (web app, web service etc)
> >>the client need to supply proper credential to the service. now as I
> >>memtion, DefaultCredentials will always
> >>return the credential that the client is running under. so by default,
the
> >>web service is running ASPNET account.
> >>you can however config the web service(I assume that's the client) to
run
> >>under a different account.
> >>
> >>I am not sure what you mean "users id" here, if you mean the login
users,
> >>then you can set the impersonate=true
> >>in the web.config file. so that calls to the WebDAV will use the login
> >>users' credentials.
> >>
> >>HTH
> >>
> >>Kevin
> >>
> >>
> >>
> >>"solex" <solex@xxxxxxxxxxxxx> wrote in message
> >>news:%2373WxyDRFHA.2736@xxxxxxxxxxxxxxxxxxxxxxx
> >>
> >>>Kevin,
> >>>
> >>>My problem is that the DefaultCredentials is NOT working. If I hard
code
> >>>the credentials using my uid/password and domain it works fine as shown
> >>>in
> >>>my first example.
> >>>
> >>>Ideally I want the web service and a subsequent call to Exchange (via
> >>>WebDAV) to run completely under the users id.
> >>>
> >>>Thanks,
> >>>Dan
> >>>
> >>>
> >>>"Kevin Yu" <koo9@xxxxxxxxxxx> wrote in message
> >>>news:etWV4kCRFHA.508@xxxxxxxxxxxxxxxxxxxxxxx
> >>>
> >>>>"solex" <solex@xxxxxxxxxxxxx> wrote in message
> >>>>news:%23wMk7BdQFHA.3076@xxxxxxxxxxxxxxxxxxxxxxx
> >>>>
> >>>>>Kevin,
> >>>>>Thanks for responding, if you (or anyone) sees anything obviously
> >>
> >>wrong
> >>
> >>>>>with the below summary please let me know.
> >>>>>
> >>>>>Thanks,
> >>>>>Dan
> >>>>>
> >>>>>I have the following settings
> >>>>> Web config:
> >>>>> <authentication mode="Windows" />
> >>>>> <identity impersonate="true" />
> >>>>>
> >>>>> IIS:
> >>>>> Anonymous access has been disabled and Integraged Security is
> >>
> >>the
> >>
> >>>>>only access that is enabled.
> >>>>>
> >>>>> Client:
> >>>>> When calling the web service I make sure that I am passing
the
> >>>>>defaultCredentials from the CredentialCache.
> >>>>>
> >>>>>I hardcoded a credential using the following code and it works
> >>>>>
> >>>>> Dim Response As System.Net.HttpWebResponse
> >>>>> Dim Request As HttpWebRequest = CType(WebRequest.Create(URI),
> >>>>>HttpWebRequest)
> >>>>> Dim MyCredentialCache = New System.Net.CredentialCache
> >>>>> MyCredentialCache.Add(New System.Uri(URI), "NTLM", _
> >>>>> New System.Net.NetworkCredential("myUserID", "myPassword",
> >>>>
> >>>>"myDomain"))
> >>>>
> >>>>> Request.Credentials = MyCredentialCache
> >>>>>
> >>>>> make my http WEBDAV request here ...
> >>>>>
> >>>>> Return (Response)
> >>>>>
> >>>>>But this does not work:
> >>>>>
> >>>>> Dim Response As System.Net.HttpWebResponse
> >>>>> Dim Request As HttpWebRequest = CType(WebRequest.Create(URI),
> >>>>>HttpWebRequest)
> >>>>>
> >>>>> Request.Credentials = CredentialCache.DefaultCredentials
> >>>>> make my http WEBDAV request here ...
> >>>>>
> >>>>> Return (Response)
> >>>>>
> >>>>
> >>>>ok. CredentialCache.DefaultCredentials will return the credentials
that
> >>>>client is running under.
> >>>>so it doens't matter what you set before the line:
> >>>>
> >>>>Request.Credentials = CredentialCache.DefaultCredentials
> >>>>
> >>>>it will always return the default credential for the request, but in
> >>>>the
> >>>>working code, since you set
> >>>>credentials in the credentialscache for that particular request URI,
so
> >>>>that
> >>>>when the client making
> >>>>calls to the destinated service, it will use that credential for the
> >>>>request, that's why it works.
> >>>>
> >>>>
> >>>>
> >>>>>Nor does this:
> >>>>>
> >>>>> Dim impersonationContext As
> >>>>>System.Security.Principal.WindowsImpersonationContext
> >>>>> Dim currentWindowsIdentity As
> >>>>
> >>>>System.Security.Principal.WindowsIdentity
> >>>>
> >>>>> currentWindowsIdentity = CType(mobjUser.Identity,
> >>>>>System.Security.Principal.WindowsIdentity)
> >>>>> impersonationContext = currentWindowsIdentity.Impersonate()
> >>>>>
> >>>>> Request.Credentials = CredentialCache.DefaultCredentials
> >>>>> Dim Response As System.Net.HttpWebResponse
> >>>>> Dim Request As HttpWebRequest = CType(WebRequest.Create(URI),
> >>>>>HttpWebRequest)
> >>>>>
> >>>>> Request.Credentials = CredentialCache.DefaultCredentials
> >>>>>
> >>>>> make my http WEBDAV request here ...
> >>>>>
> >>>>> impersonationContext.Undo()
> >>>>>
> >>>>> Return (Response)
> >>>>>
> >>>>
> >>>>I have try the same approach using implicity impersonation, what you
> >>>>are
> >>>>doing here
> >>>>is the same as using this line: Request.Credentials =
> >>>>CredentialCache.DefaultCredentials
> >>>>since you use this call to get the current identity:
> >>>>currentWindowsIdentity
> >>>>= CType(mobjUser.Identity,
> >>>>
> >>>>>System.Security.Principal.WindowsIdentity), then you do this:
> >>>>
> >>>>Request.Credentials = CredentialCache.DefaultCredentials
> >>>>thus in fact you are doing the same thing twice.
> >>>>
> >>>>it seems that doing impersonation won't change the
> >>>>defaultcredential, Request.Credentials =
> >>>>CredentialCache.DefaultCredentials
> >>>>will always return the credentials that the client is running under as
> >>>>I
> >>>>mentioned
> >>>>above.
> >>>>
> >>>>I use this code from msdn to do impersonation:
> >>>>
> >>>>#region Public Methods
> >>>>
> >>>>public bool ImpersonateValidUser()
> >>>>
> >>>>{
> >>>>
> >>>>WindowsIdentity tempWindowsIdentity;
> >>>>
> >>>>IntPtr token = IntPtr.Zero;
> >>>>
> >>>>IntPtr tokenDuplicate = IntPtr.Zero;
> >>>>
> >>>>if(RevertToSelf())
> >>>>
> >>>>{
> >>>>
> >>>>if(LogonUserA(_userName, _domain, _password,
LOGON32_LOGON_INTERACTIVE,
> >>>>
> >>>>LOGON32_PROVIDER_DEFAULT, ref token) != 0)
> >>>>
> >>>>{
> >>>>
> >>>>if(DuplicateToken(token, 2, ref tokenDuplicate) != 0)
> >>>>
> >>>>{
> >>>>
> >>>>tempWindowsIdentity = new WindowsIdentity(tokenDuplicate);
> >>>>
> >>>>impersonationContext = tempWindowsIdentity.Impersonate();
> >>>>
> >>>>if (impersonationContext != null)
> >>>>
> >>>>{
> >>>>
> >>>>CloseHandle(token);
> >>>>
> >>>>CloseHandle(tokenDuplicate);
> >>>>
> >>>>return true;
> >>>>
> >>>>}
> >>>>
> >>>>}
> >>>>
> >>>>}
> >>>>
> >>>>}
> >>>>
> >>>>if(token!= IntPtr.Zero)
> >>>>
> >>>>CloseHandle(token);
> >>>>
> >>>>if(tokenDuplicate!=IntPtr.Zero)
> >>>>
> >>>>CloseHandle(tokenDuplicate);
> >>>>
> >>>>return false;
> >>>>
> >>>>}
> >>>>
> >>>>//reverse the security context
> >>>>
> >>>>public void UndoImpersonation()
> >>>>
> >>>>{
> >>>>
> >>>>if(impersonationContext!=null)
> >>>>
> >>>>impersonationContext.Undo();
> >>>>
> >>>>}
> >>>>
> >>>>#endregion
> >>>>
> >>>>
> >>>>#region Win32 calls
> >>>>
> >>>>[DllImport("advapi32.dll")]
> >>>>
> >>>>private static extern int LogonUserA(String lpszUserName,
> >>>>
> >>>>String lpszDomain,
> >>>>
> >>>>String lpszPassword,
> >>>>
> >>>>int dwLogonType,
> >>>>
> >>>>int dwLogonProvider,
> >>>>
> >>>>ref IntPtr phToken);
> >>>>
> >>>>[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
> >>>>
> >>>>private static extern int DuplicateToken(IntPtr hToken,
> >>>>
> >>>>int impersonationLevel,
> >>>>
> >>>>ref IntPtr hNewToken);
> >>>>
> >>>>[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]
> >>>>
> >>>>private static extern bool RevertToSelf();
> >>>>
> >>>>[DllImport("kernel32.dll", CharSet=CharSet.Auto)]
> >>>>
> >>>>private static extern bool CloseHandle(IntPtr handle);
> >>>>
> >>>>#endregion
> >>>>
> >>>>
> >>>>}
> >>>>
> >>>>in conclusion, only when the correct credential in the
credentialsCache
> >>>>for
> >>>>that
> >>>>request (that particular URI), it request have access permission.
> >>>>
> >>>>thanks for your code. I will give it a try.
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>
> >>>>>"Kevin Yu" <koo9@xxxxxxxxxxx> wrote in message
> >>>>>news:u0yUSScQFHA.580@xxxxxxxxxxxxxxxxxxxxxxx
> >>>>>
> >>>>>>
> >>>>>>"solex" <solex@xxxxxxxxxxxxx> wrote in message
> >>>>>>news:%23sSDjOSQFHA.244@xxxxxxxxxxxxxxxxxxxxxxx
> >>>>>>
> >>>>>>>I'm having a similar problem
> >>>>>>>
> >>>>>>>I have a web service that make a webDav request to Exchange.
> >>>>>>>
> >>>>>>>I have impersonation on but when I use the defaultCredentials in
> >>>>>>>the
> >>>>
> >>>>web
> >>>>
> >>>>>>>services to make the webdav reqeust I get an Unauthorized 401
> >>>>>>>error.
> >>>>
> >>>>My
> >>>>
> >>>>>>>credentials have rights to make this request and I'm at my wits end
> >>>>>>>trying
> >>>>>>>to figure it out.
> >>>>>>>
> >>>>>>>The service works if I hard code my Network credentials in the
> >>
> >>service
> >>
> >>>>>>>but
> >>>>>>>does not otherwise.
> >>>>>>
> >>>>>>Hardcoded into your code? create a credential instead of using the
> >>>>>>defaultcredentials?
> >>>>>>
> >>>>>>I thought one can only create credential for "basic" or "digest"
> >>>>>>authentication mode.
> >>>>>>
> >>>>>>I try implicit impersonation, it won't work, even if you are
> >>>>>>impersonating,
> >>>>>>the web service has to
> >>>>>>put the credential on the soap message in order for it to be
> >>>>>>authenticated,
> >>>>>>because that's
> >>>>>>all the hosting service see when interacting with each other. don't
> >>>>>>want
> >>>>>>to
> >>>>>>do explicit impersonation.
> >>>>>>
> >>>>>>
> >>>>>>in .net 2.0, there will be a better support or even WSE 2.0, but
> >>>>>>this
> >>>>>>is
> >>>>>>not
> >>>>>>my options here.
> >>>>>>since if we were to use WSE 2.0, there will be a long process of
> >>
> >>paper
> >>
> >>>>>>work
> >>>>>>and testing and questioning.....
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Any help with this would also be appreciated.
> >>>>>>>
> >>>>>>>Thanks,
> >>>>>>>Dan
> >>>>>>>
> >>>>>>>
> >>>>>>>"Kevin Yu" <koo9@xxxxxxxxxxx> wrote in message
> >>>>>>>news:eOariLKQFHA.1476@xxxxxxxxxxxxxxxxxxxxxxx
> >>>>>>>
> >>>>>>>>but the problem with impersonation in the code is after
> >>
> >>LogonUser()
> >>
> >>>>>>win32
> >>>>>>
> >>>>>>>>call, will the defaultcredentials be set to the new credentials
> >>>>>>>>then?
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>"Kevin Yu" <koo9@xxxxxxxxxxx> wrote in message
> >>>>>>>>news:OEbaAMIQFHA.2356@xxxxxxxxxxxxxxxxxxxxxxx
> >>>>>>>>
> >>>>>>>>>I think impersonation will do , enable impersonation but don't
> >>>>>>>>>specified
> >>>>>>>>>the user, use code call the web service with a different
> >>>>>>>>>username/password.
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>"Brock Allen" <ballen@xxxxxxxxxxxxxxxxx> wrote in message
> >>>>>>>>>news:453919632490103600068528@xxxxxxxxxxxxxxxxxxxxxxx
> >>>>>>>>>
> >>>>>>>>>>The ASPNET account is a local account, so the other machine or
> >>>>
> >>>>domain
> >>>>
> >>>>>>>>>>wouldn't know about it. You can either run you web app under a
> >>>>>>
> >>>>>>different
> >>>>>>
> >>>>>>>>>>account, but that affects the rest of the code in there too.
> >>>>>>>>>>The
> >>>>>>>>>>other
> >>>>>>>>>>approach is to have a dedicated account (instead of using the
> >>>>
> >>>>current
> >>>>
> >>>>>>>>>>identity of ASPNET) that you can use to do the authentication
> >>
> >>and
> >>
> >>>>>>>>>>then
> >>>>>>>>>>use those credentials from the client.
> >>>>>>>>>>
> >>>>>>>>>>-Brock
> >>>>>>>>>>DevelopMentor
> >>>>>>>>>>http://staff.develop.com/ballen
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>>>hi all
> >>>>>>>>>>>
> >>>>>>>>>>>got a question here, a web service secure mode is set to
> >>>>
> >>>>"windows",
> >>>>
> >>>>>>on
> >>>>>>
> >>>>>>>>>>>the client side
> >>>>>>>>>>>
> >>>>>>>>>>>when supplying the credentials, it's like this:
> >>>>>>>>>>>
> >>>>>>>>>>>somewebservice.Authentication ssoAuth = new
> >>>>>>>>>>>somewebservice.Authentication();
> >>>>>>>>>>>
> >>>>>>>>>>>ssoAuth.PreAuthenticate = true;
> >>>>>>>>>>>
> >>>>>>>>>>>ssoAuth.Credentials =
> >>>>
> >>>>System.Net.CredentialCache.DefaultCredentials;
> >>>>
> >>>>>>>>>>>from the info here
> >>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>
> >>http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref
> >>
> >>>>/html/frlrfSystemNetCredentialCacheClassDefaultCredentialsTopic.asp
> >>>>
> >>>>>>>>>>>the defaultcredential should supply the current security
> >>
> >>context
> >>
> >>>>>>>>>>>that
> >>>>>>>>>>>the client is running, but in my case the client is another
> >>>>>>>>>>>web
> >>>>>>>>>>>service running
> >>>>>>>>>>>
> >>>>>>>>>>>on another server, now by default the account that the
> >>
> >>client(the
> >>
> >>>>>>>>>>>calling web service) is running under ASPNET account,
> >>>>>>>>>>>
> >>>>>>>>>>>so on the host(somewebservice), I should add the
> >>>>
> >>>>clientdomain\ASPNET
> >>>>
> >>>>>>>>>>>account into the windows account?
> >>>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>>
> >>>>>>
> >>>>>
> >>>>
> >>>
> >>
> >
> >


.

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