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checksum.cpp
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/******************************************************************************
* Copyright 2015-2019 Xilinx, Inc.
*
* 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.
******************************************************************************/
/*
-------------------------------------------------------------------------------
*********************************************** H E A D E R F I L E S ***
-------------------------------------------------------------------------------
*/
#include "bootimage.h"
#include "checksum.h"
#include "binary.h"
#include "Keccak-compact.h"
#ifdef USE_ISE_OPENSSL
#include "OpenSSL/export/opensslconf.h"
#include "OpenSSL/export/md5.h"
#else
#include <openssl/opensslconf.h>
#include <openssl/md5.h>
#include <openssl/sha.h>
#endif
/*
-------------------------------------------------------------------------------
***************************************************** F U N C T I O N S ***
-------------------------------------------------------------------------------
*/
/******************************************************************************/
Section* MD5ChecksumContext::Build(Binary& cache, const uint8_t* data, const Binary::Length_t length)
{
Section* section = new Section("md5checksum", Size());
if(section != NULL)
{
cache.Sections.push_back(section);
}
return section;
}
/******************************************************************************/
void MD5ChecksumContext::Link(bool bootloader, const uint8_t* data, const Binary::Length_t length, Section* section)
{
uint32_t size = Size();
uint8_t* cksum_data = new uint8_t [size];
MD5( data, length, cksum_data);
if(bootloader)
{
memcpy(section->Data + length, cksum_data, size);
}
else
{
memcpy(section->Data, cksum_data, size);
}
delete [] cksum_data;
}
/******************************************************************************/
Section* SHA2ChecksumContext::Build(Binary& cache, const uint8_t* data, const Binary::Length_t length)
{
Section* section = new Section("sha2checksum", Size());
if(section != NULL)
{
cache.Sections.push_back(section);
}
return section;
}
/******************************************************************************/
void SHA2ChecksumContext::Link(bool bootloader, const uint8_t* data, const Binary::Length_t length, Section* section)
{
uint32_t size = Size();
uint8_t* cksum_data = new uint8_t [size];
SHA256(data, length, cksum_data);
if(bootloader)
{
memcpy(section->Data + length, cksum_data, size);
}
else
{
memcpy(section->Data, cksum_data, size);
}
delete [] cksum_data;
}
/******************************************************************************/
Section* SHA3ChecksumContext::Build(Binary& cache, const uint8_t* data, const Binary::Length_t length)
{
Section* section = new Section("sha3checksum", Size());
if(section != NULL)
{
cache.Sections.push_back(section);
}
return section;
}
/******************************************************************************/
void SHA3ChecksumContext::Link(bool bootloader, const uint8_t* data, const Binary::Length_t length, Section* section)
{
uint32_t size = Size();
uint8_t* cksum_data = new uint8_t [size];
if(bootloader)
{
crypto_hash(cksum_data, data, length);
memcpy(section->Data + length, cksum_data, size);
}
else
{
crypto_hash_NIST_SHA3(cksum_data, data, length);
memcpy(section->Data, cksum_data, size);
}
delete [] cksum_data;
}
/******************************************************************************/
void ChecksumTable::Build(BootImage& bi, Binary& cache)
{
for(std::list<ImageHeader*>::iterator i = bi.imageList.begin(); i!= bi.imageList.end(); i++)
{
ImageHeader hdr(**i);
std::list<PartitionHeader*> pHList = hdr.GetPartitionHeaderList();
for(std::list<PartitionHeader*>::iterator j = pHList.begin(); j != pHList.end(); j++)
{
PartitionHeader& partHdr(**j);
if(partHdr.IsBootloader())
{
/* For FSBL, checksum should be like Bootimage Integrity, the checksum should be attached right at the end of the FSBL */
partHdr.partition->section->IncreaseLengthAndPadTo(partHdr.partition->section->Length + hdr.GetChecksumContext()->Size(), 0);
}
else
{
/* For other partitions, a new checksum section is created and added at the end of image. */
Section* s = hdr.GetChecksumContext()->Build(cache, partHdr.partition->section->Data, partHdr.partition->section->Length);
partHdr.checksumSection = s;
}
}
}
}
/******************************************************************************/
void ChecksumTable::Link(BootImage& bi)
{
for(std::list<ImageHeader*>::iterator i = bi.imageList.begin(); i!= bi.imageList.end(); i++)
{
ImageHeader hdr(**i);
std::list<PartitionHeader*> pHList = hdr.GetPartitionHeaderList();
for(std::list<PartitionHeader*>::iterator j = pHList.begin(); j != pHList.end(); j++)
{
PartitionHeader& partHdr(**j);
if(partHdr.IsBootloader())
{
hdr.GetChecksumContext()->Link(partHdr.IsBootloader(), partHdr.partition->section->Data, partHdr.partition->section->Length - hdr.GetChecksumContext()->Size(), partHdr.partition->section);
}
else
{
for (std::list<AuthenticationCertificate*>::iterator acs = partHdr.ac.begin(); acs != partHdr.ac.end(); acs++)
{
if ((*acs) && (*acs)->section)
{
uint32_t len = partHdr.partition->section->Length + (*acs)->section->Length;
uint8_t* buffer = new uint8_t[len];
memcpy(buffer, partHdr.partition->section->Data, partHdr.partition->section->Length);
memcpy(buffer + partHdr.partition->section->Length, (*acs)->section->Data, (*acs)->section->Length);
hdr.GetChecksumContext()->Link(partHdr.IsBootloader(), buffer, len, partHdr.checksumSection);
delete[] buffer;
}
else
{
hdr.GetChecksumContext()->Link(partHdr.IsBootloader(), partHdr.partition->section->Data, partHdr.partition->section->Length, partHdr.checksumSection);
}
}
}
}
}
}