The AuthnSvc argument represents the authentication service supplied to the RpcBindingInqAuthInfo and RpcBindingSetAuthInfo run-time functions.
The following constants represent valid values for the AuthnSvc argument:
| Constant | Value | Service |
|---|---|---|
| RPC_C_AUTHN_DCE_PRIVATE | 1 | DCE private key authentication |
| RPC_C_AUTHN_DCE_PUBLIC | 2 | DCE public key authentication (reserved for future use) |
| RPC_C_AUTHN_DEC_PUBLIC | 4 | DEC public key authentication (reserved for future use) |
| RPC_C_AUTHN_DEFAULT | 0xffffffff | Default authentication service |
| RPC_C_AUTHN_NONE | 0 | No authentication |
| RPC_C_AUTHN_WINNT | 10 | NTLMSSP (NT LAN Manager Security Support Provider) |
Specify RPC_C_AUTHN_NONE to turn off authentication for remote procedure calls made using the binding handle.
When you specify RPC_C_AUTHN_DEFAULT, the RPC run-time library uses the RPC_C_AUTHN_DCE_PRIVATE authentication service for remote procedure calls made using the binding handle.
RpcBindingInqAuthInfo, RpcBindingSetAuthInfo