linux-sgx-trts-modified/psw/ae/common/src/AECreateSessionResponse.cpp

/*
 * Copyright (C) 2011-2018 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:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * 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.
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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * 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
 * OWNER 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,
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 */

#include <AECreateSessionResponse.h>

#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <IAEMessage.h>

AECreateSessionResponse::AECreateSessionResponse()
    :m_response(NULL)
{
}

AECreateSessionResponse::AECreateSessionResponse(aesm::message::Response::CreateSessionResponse& response) :
    m_response(NULL)
{
    m_response = new aesm::message::Response::CreateSessionResponse(response);
}

AECreateSessionResponse::AECreateSessionResponse(uint32_t errorCode, uint32_t sessionId, uint32_t dhMsg1Length, const uint8_t* dhMsg1)
    :m_response(NULL)
{
    m_response = new aesm::message::Response::CreateSessionResponse();
    m_response->set_errorcode(errorCode);
    m_response->set_session_id(sessionId);
    if (dhMsg1Length!= 0 && dhMsg1 != NULL)
        m_response->set_se_dh_msg1(dhMsg1, dhMsg1Length);
}

AECreateSessionResponse::AECreateSessionResponse(const AECreateSessionResponse& other)
    :m_response(NULL)
{
    if (other.m_response != NULL)
        m_response = new aesm::message::Response::CreateSessionResponse(*other.m_response);
}

AECreateSessionResponse::~AECreateSessionResponse()
{
    ReleaseMemory();
}

void AECreateSessionResponse::ReleaseMemory()
{
   if (m_response != NULL)
    {
        delete m_response;
        m_response = NULL;
    }
}

AEMessage* AECreateSessionResponse::serialize()
{
    AEMessage *ae_msg = NULL;

    aesm::message::Response msg;
    if (check())
    {
        aesm::message::Response::CreateSessionResponse* mutableRes = msg.mutable_createsessionres();
        mutableRes->CopyFrom(*m_response);

        if (msg.ByteSize() <= INT_MAX) {
            ae_msg = new AEMessage;
            ae_msg->size = (unsigned int)msg.ByteSize();
            ae_msg->data = new char[ae_msg->size];
            msg.SerializeToArray(ae_msg->data, ae_msg->size);
        }
    }
    return ae_msg;
}

bool AECreateSessionResponse::inflateWithMessage(AEMessage* message)
{
    aesm::message::Response msg;
    msg.ParseFromArray(message->data, message->size);
    if (msg.has_createsessionres() == false)
        return false;

    //this is an AECreateSessionResponse
    ReleaseMemory();
    m_response = new aesm::message::Response::CreateSessionResponse(msg.createsessionres());
    return true;
}

bool AECreateSessionResponse::GetValues(uint32_t* errorCode, uint32_t* sessionId, uint32_t dhMsg1Length, uint8_t* dhMsg1) const
{
    if (m_response->has_se_dh_msg1() && dhMsg1 != NULL)
    {
        if (m_response->se_dh_msg1().size() <= dhMsg1Length)
            memcpy(dhMsg1, m_response->se_dh_msg1().c_str(), m_response->se_dh_msg1().size());
        else
            return false;
    }
    *sessionId = m_response->session_id(); 
    *errorCode = m_response->errorcode();
    return true;
}

AECreateSessionResponse& AECreateSessionResponse::operator=(const AECreateSessionResponse& other)
{
    if (this == & other)
        return *this;

    ReleaseMemory();
    if (other.m_response != NULL)
    {
        m_response = new aesm::message::Response::CreateSessionResponse(*other.m_response);
    }
    return *this;
}

bool AECreateSessionResponse::check()
{
    if (m_response == NULL)
        return false;
    return m_response->IsInitialized();
}