RPC Access denied problem in RPC client

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I am creating a project in which the client needs to call some remote method.
Both the client and server is uses Win32 APIs.

The server have sucessfully registered it's iterface sucessfully.
The client it getting a valid have value to the remote system using

C++

RpcBindingFromStringBinding

API.

But when the actual RPC method is called it's throwing an exception and

C++

RpcExceptionCode()

API returning 5 (Access denied error).

What should I do to resolve this problem.

I am using

C++

ncacn_ip_tcp

protocol sequence and I tested my code in Windows 7.

Posted 8-Aug-11 3:02am

Debojyoti Majumder

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KarstenK · Answer 1 · 2011-08-08T22:03:00

Solution 1

The client thread needs to have valid credentials on the server. It is common use to create an account for an RPC-Server and give that credentials to the client threads.

Posted 8-Aug-11 22:03pm

KarstenK

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Debojyoti Majumder 9-Aug-11 6:09am

@KarstenK
Thanks.

I tried to give some credentials to the client thread.
I used this code...

RPC_SECURITY_QOS SecQos;

// Set the quality of service on the binding handle
SecQos.Version = RPC_C_SECURITY_QOS_VERSION_1;
SecQos.Capabilities = RPC_C_QOS_CAPABILITIES_MUTUAL_AUTH;
SecQos.IdentityTracking = RPC_C_QOS_IDENTITY_DYNAMIC;
SecQos.ImpersonationType = RPC_C_IMP_LEVEL_IDENTIFY;

status = RpcBindingSetAuthInfoEx(hello_v1_0_c_ifspec,
NULL,RPC_C_AUTHN_LEVEL_PKT_PRIVACY, RPC_C_AUTHN_WINNT, NULL,RPC_C_AUTHZ_NONE,&SecQos);

But the call it's not working.
status returned 1702... invalid binding.

What am I doing worng??

KarstenK 9-Aug-11 6:16am

To clarify: the client credentials (username & password) have to be valid on the remote machine for the neeeded actions.

Can you start and run the client on the server machine?