IClientSecurity::QueryBlanket
Retrieves
authentication information.
HRESULT QueryBlanket(
|
void* pProxy , |
//Location
for the proxy to query |
|
DWORD* pAuthnSvc , |
//Location
for the current authentication service |
|
DWORD* pAuthzSvc , |
//Location
for the current authorization service |
|
OLECHAR
** pServerPrincName , |
//Location
for the current principal name |
|
DWORD * pAuthnLevel
, |
//Location
for the current authentication level |
|
DWORD * pImpLevel , |
//Location
for the current impersonation level |
|
RPC_AUTH_IDENTITY_HANDLE ** ppAuthInfo
, |
//Location for the value passed to
IClientSecurity::SetBlanket |
|
DWORD
** pCapabilities |
//Location for flags indicating further capabilities
of the proxy |
|
); |
|
Parameter
pProxy
[in] Pointer
to the proxy to query.pAuthnSvc
[out] Pointer
to a DWORD value defining the current authentication service. This will
be a single value taken from the list of RPC_C_AUTHN_xxx constants. May be NULL,
in which case the current authentication service is not retrieved.
pAuthzSvc
[out] Pointer
to a DWORD value defining the current authorization service. This will
be a single value taken from the list of RPC_C_AUTHZ_xxx constants. May be
NULL, in which case the current authorization service is not retrieved.
pServerPrincName
[out] Pointer
to the current principal name. The string will be allocated by the one called
using CoTaskMemAlloc
and must be freed by the caller using CoTaskMemFree when they are done with
it. May be NULL, in which case the principal name is not retrieved.
pAuthnLevel
[out] Pointer
to a DWORD value defining the current authentication level. This will be a
single value taken from the list of RPC_C_AUTHN_LEVEL_xxx constants. May be
NULL, in which case the current authentication level is not retrieved.
pImpLevel
[out] Pointer
to a DWORD value defining the current impersonation level. This will be a
single value taken from the list of RPC_C_IMP_LEVEL_xxx constants. May be NULL,
in which case the current authentication level is not retrieved.
ppAuthInfo
[out] Pointer
to the pointer value passed to IClientSecurity::SetBlanket indicating
the identity of the client. Because this points to the value itself and is not
a copy, it should not be manipulated. May be NULL, in which case the information
is not retrieved.
pCapabilities
[out] Pointer
to a DWORD of flags indicating further capabilities of the proxy. Currently, no
flags are defined for this parameter and it will only return zero. May be NULL,
in which case the flags indicating further capabilities are not retrieved.
Return Values
S_OK
Success.
E_INVALIDARG
One or more
arguments are invalid.
E_OUTOFMEMORY
Insufficient
memory to create the pServerPrincName out-parameter.
Remarks
IClientSecurity::QueryBlanket is called by the client to retrieve the
authentication information COM will use on calls made from the specified proxy.
With a pointer to an interface on the proxy, the client would first call QueryInterface
for a pointer to IClientSecurity, then, with this pointer, would call IClientSecurity::QueryBlanket,
followed by releasing the pointer. This
sequence of calls is encapsulated in the helper function CoQueryProxyBlanket.
In pProxy,
you can pass any proxy, such as a proxy you get through a call to CoCreateInstance,
CoUnmarshalInterface, or just passing an interface pointer as a
parameter. It can be any interface. You cannot pass a pointer to something that
is not a proxy. Thus you can t pass a
pointer to an interface that has the local keyword in its interface definition
since no proxy is created for such an interface. IUnknown is the exception.
See Also