windows-xp/Source/XPSP1/NT/ds/security/base/lsa/uclient/crclient.c

/*++

Copyright (c) 1991  Microsoft Corporation

Module Name:

    crclient.c

Abstract:

    Local Security Authority - Client Cipher Routines

    These routines interface the LSA client side with the Cipher
    Routines.  They perform RPC-style memory allocation.

Author:

    Scott Birrell       (ScottBi)   	December 13, 1991

Environment:

Revision History:

--*/

#include <lsaclip.h>


NTSTATUS
LsapCrClientGetSessionKey(
    IN LSA_HANDLE ObjectHandle,
    OUT PLSAP_CR_CIPHER_KEY *SessionKey
    )

/*++

Routine Description:

    This function obtains the Session Key, allocates an Cipher Key
    structure and returns the key.

Arguments:

    ObjectHandle - Handle from an LsaOpen<ObjectType> call.

    SessionKey - Receives a pointer to a structure containing the
       Session Key in which the memory has been allocated via
       MIDL_user_allocate().

Return Value:

    NTSTATUS - Standard Nt Result Code

        STATUS_INSUFFICIENT_RESOURCES - Insufficient system resources
            (e.g memory) to complete the call.
--*/

{
    NTSTATUS Status = STATUS_SUCCESS;
    PLSAP_CR_CIPHER_KEY OutputSessionKey = NULL;
    ULONG OutputSessionKeyBufferLength;

    //
    // Allocate memory for the Session Key buffer and LSAP_CR_CIPHER_KEY
    // structure.
    //

    OutputSessionKeyBufferLength = sizeof (USER_SESSION_KEY);

    Status = STATUS_INSUFFICIENT_RESOURCES;

    OutputSessionKey = MIDL_user_allocate(
                           OutputSessionKeyBufferLength +
                           sizeof (LSAP_CR_CIPHER_KEY)
                           );

    if (OutputSessionKey == NULL) {

        goto ClientGetSessionKeyError;
    }

    //
    // Fill in the Cipher key structure, making the buffer point to
    // just beyond the header.
    //

    OutputSessionKey->Length = OutputSessionKeyBufferLength;
    OutputSessionKey->MaximumLength = OutputSessionKeyBufferLength;
    OutputSessionKey->Buffer = (PUCHAR) (OutputSessionKey + 1);

    Status = RtlGetUserSessionKeyClient(
                 ObjectHandle,
                 (PUSER_SESSION_KEY) OutputSessionKey->Buffer
                 );

    if (!NT_SUCCESS(Status)) {

        goto ClientGetSessionKeyError;
    }


ClientGetSessionKeyFinish:

    *SessionKey = OutputSessionKey;
    return(Status);

ClientGetSessionKeyError:

    goto ClientGetSessionKeyFinish;
}