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ISecurityProperty::GetDirectCallerSID method (comsvcs.h)

  • Article

Retrieves the security identifier of the external process that called the currently executing method. You can also obtain this information using ISecurityCallContext.

Syntax

HRESULT GetDirectCallerSID(
  [out] PSID *pSID
);

Parameters

[out] pSID

A reference to the security ID of the process from which the current method was invoked.

Return value

This method can return the standard return values E_INVALIDARG, E_OUTOFMEMORY, E_UNEXPECTED, and E_FAIL, as well as the following values.

Return code Description
S_OK
 The security ID of the process that called the current method is returned in the parameter pSid.
CONTEXT_E_NOCONTEXT
 The current object does not have a context associated with it because either the component was not imported into an application or the object was not created with one of the COM+ CreateInstance methods.

Remarks

Use the GetDirectCallerSID method to determine the security ID of the process that called the object's currently executing method. Security is enforced across process boundaries. This means that the security ID returned by GetDirectCallerSID is the security ID associated with the process that called into the process in which the current object is running, not necessarily the immediate caller into the object itself. If an object calls into another object within the same process, when the second object calls GetDirectCallerSID it gets the security ID of the most immediate caller outside its own process boundary, not the security ID of the object that directly called into it.

The following scenarios illustrate the functionality of the GetDirectCallerSID method:

  • A base process running on Server A, as user A, calls into Object X on Server B, running as user B. Then Object X calls into Object Y, running on Server C. If Object Y calls GetDirectCallerSID, the security ID of user B is returned.
  • A base process, running on Server A as user A, calls into Object X on Server B, running as user B. Then Object X calls into Object Y, running in the same process as Object X, also on Server B. When Object Y calls GetDirectCallerSID, the security ID of user A is returned, not the security ID of user B.
You must call ISecurityProperty::ReleaseSID on a security ID when you finish using it.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header comsvcs.h

See also

ISecurityProperty