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Date: Sat, 16 Nov 2024 00:21:22 +0900
To: cygwin AT cygwin DOT com
Subject: Re: SMBFS mount's file cannot be made executable
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From: Takashi Yano via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
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On Thu, 14 Nov 2024 01:08:07 +0900
Takashi Yano wrote:
> On Wed, 13 Nov 2024 08:58:21 -0700
> Bill Stewart wrote:
> > On Wed, Nov 13, 2024 at 8:38 AM Takashi Yano via Cygwin wrote:
> > 
> > Thanks. However, even after reading the document, I still didn't
> > > understand what strings I should set the members for auth for SMB...
> > >
> > > For example, as for Endpoint, the example for ncacn_np is mentioned,
> > > but not for ncacn_ip_tcp.
> > >
> > 
> > Perhaps this might help?
> > 
> >  https://learn.microsoft.com/en-us/windows/win32/rpc/string-binding
> 
> Thanks! I do not read it yet, however, it seems to help much.

I built a test program, whose important part is:

  AUTHZ_RESOURCE_MANAGER_HANDLE hManager = NULL;
  AUTHZ_CLIENT_CONTEXT_HANDLE hClient = NULL;
  AUTHZ_ACCESS_REQUEST AccessRequest = {0};
  AUTHZ_ACCESS_REPLY AccessReply = {0};

  AUTHZ_RPC_INIT_INFO_CLIENT authzRpcInitInfoClient = {0};

  WCHAR ObjectUuid[] = L"9a81c2bd-a525-471d-a4ed-49907c0b23da";
  WCHAR ProtSeq[] = L"ncacn_ip_tcp";
  WCHAR NetworkAddr[] = L"localhost";
  WCHAR Endpoint[] = L"135";

  authzRpcInitInfoClient.version = AUTHZ_INIT_INFO_VERSION_V1;
  authzRpcInitInfoClient.ObjectUuid = ObjectUuid;
  authzRpcInitInfoClient.ProtSeq = ProtSeq;
  authzRpcInitInfoClient.NetworkAddr = NetworkAddr;
  authzRpcInitInfoClient.Endpoint = Endpoint;

  AuthzInitializeRemoteResourceManager (&authzRpcInitInfoClient, &hManager);

  char buf[1024];
  PTOKEN_USER pTokenUser = (PTOKEN_USER) buf;
  DWORD len;

  GetTokenInformation(hToken, TokenUser, pTokenUser, 1024, &len);

  LUID luid = {0,};
  AuthzInitializeContextFromSid(0, pTokenUser->User.Sid, hManager,
                                NULL, luid, NULL, &hClient);


This test code fails at AuthzInitializeContextFromSid() with
RPC_S_UNKNOWN_IF. If AuthzInitializeRemoteResourceManager()
is replaced with AuthzInitializeResourceManager(), the error
does not occur.

I searched the combination of AuthzInitializeContextFromSid()
and RPC_S_UNKNOWN_IF, however nothing was found.

Any suggestion would be appreciated.

-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

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