/********************************************************************************/
/*										*/
/*			     				*/
/*			     Written by Ken Goldman				*/
/*		       IBM Thomas J. Watson Research Center			*/
/*            $Id: Response.c 1259 2018-07-10 19:11:09Z kgoldman $			*/
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/********************************************************************************/

/* 9.15 Response.c */
/* 9.15.1 Description */
/* This file contains the common code for building a response header, including setting the size of
   the structure. command may be NULL if result is not TPM_RC_SUCCESS. */
/* 9.15.2 Includes and Defines */
#include "Tpm.h"
/*     9.15.3 BuildResponseHeader() */
/* Adds the response header to the response. It will update command->parameterSize to indicate the
   total size of the response. */
void
BuildResponseHeader(
		    COMMAND         *command,       // IN: main control structure
		    BYTE            *buffer,        // OUT: the output buffer
		    TPM_RC           result         // IN: the response code
		    )
{
    TPM_ST              tag;
    UINT32              size;
    if(result != TPM_RC_SUCCESS)
	{
	    tag = TPM_ST_NO_SESSIONS;
	    size = 10;
	}
    else
	{
	    tag = command->tag;
	    // Compute the overall size of the response
	    size = STD_RESPONSE_HEADER + command->handleNum * sizeof(TPM_HANDLE);
	    size += command->parameterSize;
	    size += (command->tag == TPM_ST_SESSIONS) ?
		    command->authSize + sizeof(UINT32) : 0;
	}
    TPM_ST_Marshal(&tag, &buffer, NULL);
    UINT32_Marshal(&size, &buffer, NULL);
    TPM_RC_Marshal(&result, &buffer, NULL);
    if(result == TPM_RC_SUCCESS)
	{
	    if(command->handleNum > 0)
		TPM_HANDLE_Marshal(&command->handles[0], &buffer, NULL);
	    if(tag == TPM_ST_SESSIONS)
		UINT32_Marshal((UINT32 *)&command->parameterSize, &buffer, NULL);
	}
    command->parameterSize = size;
}