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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/include/usr/secureboot/header.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2013,2017 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#ifndef __SECUREBOOT_HEADER_H
#define __SECUREBOOT_HEADER_H
#include <stdint.h>
#include <pnor/pnorif.H>
#include <util/singleton.H>
#include <errl/errlentry.H>
#include <errl/errlmanager.H>
/** @file header.H
*
* @brief Class for manipulating the base image (HBB) secureboot header.
*/
namespace SECUREBOOT
{
/** @class Header
* @brief Class for storing the base image (HBB) header for later use.
*/
class Header
{
public:
/**
* @brief Build a base image (HBB) header object
*/
Header()
: iv_data(NULL)
{
}
/**
* @brief Destroy a base image (HBB) header object, including any
* cached header page
*/
~Header()
{
free(const_cast<void*>(iv_data));
iv_data=NULL;
}
/**
* @brief Extracts base image (HBB) header (ECC removed) from
* area preserved across the bootloader to HBB handoff to
* support extending HBB measurements to TPM
*
* @return Error handle if error; otherwise nullptr
*/
errlHndl_t loadHeader();
/**
* @brief Return pointer to base image (HBB) header.
*
* @par Detailed Description:
* During boot, SBE copies the boot loader (HBBL) into the cache
* and hands off control to it. The boot loader then loads the
* base image (HBB), including its secure header. After
* verifying HBB, the boot loader copies hostboot to the trusted
* memory location and passes control to HBB, which locates and
* preserves the secure header (among other things) before
* initializing the other non-preserved areas of the cache. In
* secure mode, HBB then initializes this header object with the
* preserved secure header.
*
* In non-secure mode, Hostboot pulls the header from PNOR and
* and writes it into this object.
*
* This API then returns the addresses of the cached header.
*
* @param[out] o_pHeader Pointer to HBB header
*
* @warning Asserts if HBB header not loaded (code bug)
*/
void getHeader(
const void*& o_pHeader) const;
private:
/**
* @brief Populate the base image (HBB) header (ECC removed)
* to support extending HBB measurements to TPM
*
* @param[in] i_pHeader Pointer to 4k HBB header
*
* @warning Asserts if input pointer is NULL (code bug)
* @warning Asserts if header already cached (code bug)
* @warning Memory violation if buffer data is less than 4k in size
* (code bug)
* @warning Ignores buffer data beyond 4k in size
*/
void _set(
const void* i_pHeader);
// Pointer to copy of the base image's (HBB's) secureboot header
const void* iv_data;
// Don't allow copies / assignments
Header(const Header& that);
Header& operator=(const Header&);
};
/**
* @brief Returns the base image (HBB) header singleton
*
* @return Header Reference to base image (HBB) header object
*/
Header& baseHeader();
};
#endif
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