tcti/tcti.c

//**********************************************************************;
// Copyright (c) 2015, 2017 Intel Corporation
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//**********************************************************************;

#include <stdio.h>
#include <stdlib.h>   // Needed for _wtoi

#include <tcti/common.h>
#include "sapi/tpm20.h"
#include "tcti.h"
#include "common/debug.h"

TSS2_RC CommonSendChecks(
    TSS2_TCTI_CONTEXT *tctiContext,       /* in */
    uint8_t           *command_buffer     /* in */
    )
{
    TSS2_TCTI_CONTEXT_INTEL *tcti_intel = tcti_context_intel_cast (tctiContext);

    if( tctiContext == NULL || command_buffer == NULL )
    {
        return TSS2_TCTI_RC_BAD_REFERENCE;
    }

    if (tcti_intel->previousStage == TCTI_STAGE_SEND_COMMAND)
    {
        return TSS2_TCTI_RC_BAD_SEQUENCE;
    }

    if (tcti_intel->magic != TCTI_MAGIC ||
        tcti_intel->version != TCTI_VERSION)
    {
        return TSS2_TCTI_RC_BAD_CONTEXT;
    }

    return TSS2_RC_SUCCESS;
}


TSS2_RC CommonReceiveChecks(
    TSS2_TCTI_CONTEXT *tctiContext,     /* in */
    size_t          *response_size,     /* out */
    unsigned char   *response_buffer    /* in */
    )
{
    TSS2_TCTI_CONTEXT_INTEL *tcti_intel = tcti_context_intel_cast (tctiContext);

    if( tctiContext == NULL || response_size == NULL )
    {
        return TSS2_TCTI_RC_BAD_REFERENCE;
    }

    if (tcti_intel->previousStage == TCTI_STAGE_RECEIVE_RESPONSE)
    {
        return TSS2_TCTI_RC_BAD_SEQUENCE;
    }

    if (tcti_intel->magic != TCTI_MAGIC ||
        tcti_intel->version != TCTI_VERSION)
    {
        return TSS2_TCTI_RC_BAD_CONTEXT;
    }

    return TSS2_RC_SUCCESS;
}