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authentication-versal.cpp
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authentication-versal.cpp
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/******************************************************************************
* Copyright 2015-2022 Xilinx, Inc.
* Copyright 2022-2023 Advanced Micro Devices, 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 "authentication-versal.h"
#include "authentication.h"
#include "bootgenexception.h"
#include "stringutils.h"
#include "binary.h"
#include "bootimage.h"
#include <iomanip>
#include <iostream>
#include "string.h"
#include "options.h"
#include <limits>
#include "partitionheadertable-versal.h"
#include "imageheadertable-versal.h"
#include "Keccak-compact-versal.h"
#include "encryptutils.h"
#include <openssl/rand.h>
/*
-------------------------------------------------------------------------------
***************************************************** F U N C T I O N S ***
-------------------------------------------------------------------------------
*/
/******************************************************************************/
VersalAuthenticationContext::VersalAuthenticationContext(Authentication::Type type)
{
signatureLength = SIGN_LENGTH_VERSAL;
spksignature = new uint8_t[signatureLength];
bHsignature = new uint8_t[signatureLength];
spkSignLoaded = false;
memset(udf_data, 0, UDF_DATA_SIZE);
memset(bHsignature, 0, signatureLength);
bhSignLoaded = false;
certSize = sizeof(AuthCertificate4096Sha3PaddingStructure);
hashType = AuthHash::Sha3;
authAlgorithm = GetAuthenticationAlgorithm(type);
if (type == Authentication::RSA)
{
primaryKey = new Key4096Sha3Padding("Primary Key");
secondaryKey = new Key4096Sha3Padding("Secondary Key");
primaryKey->authType = Authentication::RSA;
secondaryKey->authType = Authentication::RSA;
}
else if (type == Authentication::ECDSA)
{
primaryKey = new KeyECDSA("Primary Key");
secondaryKey = new KeyECDSA("Secondary Key");
primaryKey->authType = Authentication::ECDSA;
secondaryKey->authType = Authentication::ECDSA;
}
else
{
primaryKey = new KeyECDSAp521("Primary Key");
secondaryKey = new KeyECDSAp521("Secondary Key");
primaryKey->authType = Authentication::ECDSAp521;
secondaryKey->authType = Authentication::ECDSAp521;
}
}
/******************************************************************************/
VersalAuthenticationContext::VersalAuthenticationContext(const AuthenticationContext* refAuthContext, Authentication::Type authtype)
{
signatureLength = SIGN_LENGTH_VERSAL;
spksignature = new uint8_t[signatureLength];
bHsignature = new uint8_t[signatureLength];
authAlgorithm = GetAuthenticationAlgorithm(authtype);
hashType = AuthHash::Sha3;
ppkFile = refAuthContext->ppkFile;
pskFile = refAuthContext->pskFile;
spkFile = refAuthContext->spkFile;
sskFile = refAuthContext->sskFile;
spkSignFile = refAuthContext->spkSignFile;
bhSignFile = refAuthContext->bhSignFile;
spkSelect = refAuthContext->spkSelect;
spkIdentification = refAuthContext->spkIdentification;
if (authtype == Authentication::RSA)
{
primaryKey = new Key4096Sha3Padding("Primary Key");
secondaryKey = new Key4096Sha3Padding("Secondary Key");
primaryKey->authType = Authentication :: RSA;
secondaryKey->authType = Authentication :: RSA;
}
else if(authtype == Authentication::ECDSA)
{
primaryKey = new KeyECDSA("Primary Key");
secondaryKey = new KeyECDSA("Secondary Key");
primaryKey->authType = Authentication :: ECDSA;
secondaryKey->authType = Authentication :: ECDSA;
}
else
{
primaryKey = new KeyECDSAp521("Primary Key");
secondaryKey = new KeyECDSAp521("Secondary Key");
primaryKey->authType = Authentication :: ECDSAp521;
secondaryKey->authType = Authentication :: ECDSAp521;
}
if (pskFile != "" || ppkFile != "")
{
if (pskFile != "")
{
primaryKey->ParseSecret(pskFile);
}
if (ppkFile != "")
{
primaryKey->ParsePublic(ppkFile);
}
}
else
{
primaryKey = refAuthContext->primaryKey;
}
if (spkFile != "" || sskFile != "")
{
if (sskFile != "")
{
secondaryKey->ParseSecret(sskFile);
}
if (spkFile != "")
{
secondaryKey->ParsePublic(spkFile);
}
}
else
{
secondaryKey = refAuthContext->secondaryKey;
}
if (spkSignFile != "")
{
SetSPKSignatureFile(spkSignFile);
}
else
{
memcpy(spksignature, refAuthContext->spksignature, signatureLength);
}
if (bhSignFile != "")
{
SetBHSignatureFile(bhSignFile);
}
else
{
memcpy(bHsignature, refAuthContext->bHsignature, signatureLength);
}
memcpy(udf_data, refAuthContext->udf_data, sizeof(udf_data));
bhSignLoaded = refAuthContext->bhSignLoaded;
spkSignLoaded = refAuthContext->spkSignLoaded;
spkSignRequested = refAuthContext->spkSignRequested;
certSize = sizeof(AuthCertificate4096Sha3PaddingStructure);
preSigned = refAuthContext->preSigned;
}
/******************************************************************************/
VersalAuthenticationContext::VersalAuthenticationContext(const AuthCertificate4096Sha3PaddingStructure* existingCert, Authentication::Type authtype)
{
signatureLength = SIGN_LENGTH_VERSAL;
spksignature = new uint8_t[signatureLength];
spkSignLoaded = true;
bHsignature = new uint8_t[signatureLength];
bhSignLoaded = true;
authAlgorithm = GetAuthenticationAlgorithm(authtype);
if (authtype == Authentication::RSA)
{
primaryKey = new Key4096Sha3Padding("Primary Key");
secondaryKey = new Key4096Sha3Padding("Secondary Key");
primaryKey->authType = Authentication::RSA;
secondaryKey->authType = Authentication::RSA;
}
else if (authtype == Authentication::ECDSA)
{
primaryKey = new KeyECDSA("Primary Key");
secondaryKey = new KeyECDSA("Secondary Key");
primaryKey->authType = Authentication::ECDSA;
secondaryKey->authType = Authentication::ECDSA;
}
else
{
primaryKey = new KeyECDSAp521("Primary Key");
secondaryKey = new KeyECDSAp521("Secondary Key");
primaryKey->authType = Authentication::ECDSAp521;
secondaryKey->authType = Authentication::ECDSAp521;
}
primaryKey->Import(&existingCert->acPpk, "Primary Key");
secondaryKey->Import(&existingCert->acSpk, "Secondary Key");
hashType = AuthHash::Sha3;
authAlgorithm->RearrangeEndianess(primaryKey->N, sizeof(existingCert->acPpk.N));
authAlgorithm->RearrangeEndianess(primaryKey->N_ext, sizeof(existingCert->acPpk.N_extension));
authAlgorithm->RearrangeEndianess(primaryKey->E, sizeof(existingCert->acPpk.E));
authAlgorithm->RearrangeEndianess(secondaryKey->N, sizeof(existingCert->acSpk.N));
authAlgorithm->RearrangeEndianess(secondaryKey->N_ext, sizeof(existingCert->acSpk.N_extension));
authAlgorithm->RearrangeEndianess(secondaryKey->E, sizeof(existingCert->acSpk.E));
memcpy(spksignature, existingCert->acSpkSignature.Signature, signatureLength);
memcpy(bHsignature, existingCert->acHeaderSignature.Signature, signatureLength);
memcpy(udf_data, existingCert->acUdf, UDF_DATA_SIZE);
spkIdentification = existingCert->spkId;
certSize = sizeof(AuthCertificate4096Sha3PaddingStructure);
}
/******************************************************************************/
AuthenticationAlgorithm* VersalAuthenticationContext::GetAuthenticationAlgorithm(Authentication::Type type)
{
if (type == Authentication::ECDSA)
{
SetAuthenticationKeyLength(EC_P384_KEY_LENGTH);
return new ECDSAAuthenticationAlgorithm();
}
else if (type == Authentication::ECDSAp521)
{
//SetAuthenticationKeyLength(EC_P521_KEY_LENGTH);
return new ECDSAP521AuthenticationAlgorithm();
}
else
{
SetAuthenticationKeyLength(RSA_4096_KEY_LENGTH);
return new RSA4096Sha3PaddingAuthenticationAlgorithm();
}
}
/******************************************************************************/
uint32_t VersalAuthenticationContext::GetCertificateSize(void)
{
return certSize;
}
/******************************************************************************/
VersalAuthenticationContext::~VersalAuthenticationContext()
{
if (spksignature != NULL)
{
delete[] spksignature;
spksignature = nullptr;
}
if (bHsignature != NULL)
{
delete[] bHsignature;
bHsignature = nullptr;
}
if (primaryKey != NULL)
{
delete primaryKey;
primaryKey = nullptr;
}
if (secondaryKey != NULL)
{
delete secondaryKey;
secondaryKey = nullptr;
}
}
/******************************************************************************/
ECDSAAuthenticationAlgorithm::ECDSAAuthenticationAlgorithm()
{
certSize = sizeof(AuthCertificateECDSAStructure);
authType = Authentication::ECDSA;
}
/******************************************************************************/
ECDSAAuthenticationAlgorithm::~ECDSAAuthenticationAlgorithm()
{
}
/******************************************************************************/
ECDSAP521AuthenticationAlgorithm::ECDSAP521AuthenticationAlgorithm()
{
certSize = sizeof(AuthCertificateECDSAp521Structure);
authType = Authentication::ECDSAp521;
}
/******************************************************************************/
ECDSAP521AuthenticationAlgorithm::~ECDSAP521AuthenticationAlgorithm()
{
}
/******************************************************************************/
RSA4096Sha3PaddingAuthenticationAlgorithm::RSA4096Sha3PaddingAuthenticationAlgorithm()
{
certSize = sizeof(AuthCertificate4096Sha3PaddingStructure);
authType = Authentication::RSA;
}
/******************************************************************************/
RSA4096Sha3PaddingAuthenticationAlgorithm::~RSA4096Sha3PaddingAuthenticationAlgorithm()
{
}
/******************************************************************************/
static void FillSha3Padding(uint8_t* pad, uint32_t sha3PadLength)
{
uint8_t *sha3 = new uint8_t[sha3PadLength];
memset(sha3, 0, sha3PadLength);
sha3[0] = 0x6;
sha3[(sha3PadLength)-1] |= 0x80;
memcpy(pad, sha3, sha3PadLength);
delete[] sha3;
}
/******************************************************************************/
uint8_t* RSA4096Sha3PaddingAuthenticationAlgorithm::AttachSHA3Padding(uint8_t* data, const Binary::Length_t datalength)
{
uint8_t sha3padding = SHA3_PAD_LENGTH - (datalength % SHA3_PAD_LENGTH);
uint8_t *dataSha3 = new uint8_t[datalength + sha3padding];
memset(dataSha3, 0, datalength + sha3padding);
memcpy(dataSha3, data, datalength);
dataSha3[datalength] = 0x6;
dataSha3[(datalength + sha3padding) - 1] |= 0x80;
return dataSha3;
}
/******************************************************************************/
int RSA4096Sha3PaddingAuthenticationAlgorithm::MaskGenerationFunction(unsigned char *mask, long len, const unsigned char *seed, long seedlen, const EVP_MD *dgst)
{
long i, outlen = 0;
unsigned char cnt[4];
unsigned char md[SHA3_LENGTH_BYTES];
int mdlen = SHA3_LENGTH_BYTES;
int rv = -1;
uint8_t* c = new uint8_t[52];
uint8_t* cSha3Pad = NULL;
if (mdlen < 0)
goto err;
for (i = 0; outlen < len; i++)
{
cnt[0] = (unsigned char)((i >> 24) & 255);
cnt[1] = (unsigned char)((i >> 16) & 255);
cnt[2] = (unsigned char)((i >> 8)) & 255;
cnt[3] = (unsigned char)(i & 255);
memcpy(c, seed, seedlen);
memcpy(c + seedlen, cnt, 4);
cSha3Pad = AttachSHA3Padding(c, (seedlen + 4));
if (outlen + mdlen <= len)
{
Versalcrypto_hash(mask + outlen, cSha3Pad, 104, false);
outlen += mdlen;
}
else
{
Versalcrypto_hash(md, cSha3Pad, 104, false);
memcpy(mask + outlen, md, len - outlen);
outlen = len;
}
}
rv = 0;
delete[] c;
delete[] cSha3Pad;
err:
return rv;
}
/******************************************************************************/
Section* VersalAuthenticationContext::CreateCertificate(BootImage& bi, Binary& cache, Section* dataSection)
{
LOG_INFO("Creating Authentication Certificate for section - %s", dataSection->Name.c_str());
hashType = bi.GetAuthHashAlgo();
hash = bi.hash;
hashLength = hash->GetHashLength();
std::string hashExtension = hash->GetHashFileExtension();
/* Partition size must be 64-byte aligned */
if ((dataSection->Length & 0x3F) != 0)
{
//LOG_ERROR("Authentication Error !!!\n Partition %s's length %d bytes - is not 64-byte aligned - %s", dataSection->Name.c_str(), dataSection->Length);
}
/* Secondary key is must for authenticating */
if (!secondaryKey->Loaded)
{
LOG_ERROR("Authentication Error !!!\n Secondary key must be specified in BIF file for %s", dataSection->Name.c_str());
}
if (!secondaryKey->isSecret)
{
if (presignFile != "")
{
// ok
}
else if (bi.options.GetNonBootingFlag() && (dataSection->Name.find("MetaHeader") != std::string::npos))
{
// ok
}
else if (bi.options.DoGenerateHashes() || bi.options.GetNonBootingFlag())
{
static bool warningGiven = false;
std::list<std::string> outFilename = bi.options.GetOutputFileNames();
if (outFilename.size() > 0)
{
if (!warningGiven)
{
LOG_WARNING("SSK is needed to authenticate a boot image. Because the key provided is not secret, the bootimage will not be usable. However, the sha hash files will be generated for offline signing");
warningGiven = true;
}
}
}
else if (bi.currentAuthCtx->spkSignRequested != "")
{
LOG_WARNING("SSK is needed to authenticate a boot image. Because the key provided is not secret, the bootimage will not be usable. However, SPK signature will be generated as requested.");
}
else
{
LOG_ERROR("Authentication Error !!!\n SSK or partition must have [presign=xxx] attribute in BIF file for section %s", dataSection->Name.c_str());
}
}
if (!(primaryKey->Loaded && primaryKey->isSecret) && !spkSignLoaded)
{
if (bi.options.DoGenerateHashes())
{
LOG_WARNING("Either PSK or spksignature is needed to authenticate bootimage or generate partition hashes. Because they are not provided, the bootimage and partition hashes will not be usable. However SPK hash and bootheader hash files generated can be used for offline signing.");
}
else
{
LOG_ERROR("Authentication Error !!!\n Either PSK or SPK signature file must be specified in BIF file.");
}
}
std::string name = dataSection->Name;
if (dataSection->index == 0)
{
name = GetCertificateName(name);
}
Section* acSection = new Section(name + hashExtension, certSize);
acSection->isCertificate = true;
acSection->index = dataSection->index;
cache.Sections.push_back(acSection);
uint8_t* authCert = acSection->Data;
LOG_TRACE("Creating new section for certificate - %s", acSection->Name.c_str());
uint32_t x = sizeof(AuthCertificate4096Sha3PaddingStructure);
if (x != certSize)
{
LOG_DEBUG(DEBUG_STAMP, "Bad Authentication Certificate Size");
LOG_ERROR("Authentication Error !!!");
}
memset(authCert, 0, certSize);
uint32_t acHdr = authAlgorithm->GetAuthHeader();
acHdr |= ((bi.GetAuthHashAlgo()) ? 0 : 1) << AC_HDR_SHA_2_3_BIT_SHIFT;
WriteLittleEndian32(authCert+AC_HEADER_OFFSET, acHdr);
WriteLittleEndian32(authCert+AC_SPK_ID_OFFSET, spkIdentification);
if (udfFile != "")
{
LoadUdfData(udfFile, udf_data);
authAlgorithm->RearrangeEndianess(udf_data, sizeof(udf_data));
memcpy(authCert+AC_UDF_OFFSET, udf_data, UDF_DATA_SIZE);
}
primaryKey->Export(authCert+AC_PPK_KEY_OFFSET);
authAlgorithm->RearrangeEndianess(authCert+AC_PPK_KEY_OFFSET + RSA_4096_N, RSA_4096_N_SIZE);
authAlgorithm->RearrangeEndianess(authCert + AC_PPK_KEY_OFFSET + RSA_4096_N_EXT, RSA_4096_N_EXT_SIZE);
authAlgorithm->RearrangeEndianess(authCert + AC_PPK_KEY_OFFSET + RSA_4096_E, RSA_4096_E_SIZE);
FillSha3Padding(authCert+AC_PPK_SHA3PAD_OFFSET, AC_PPK_SHA3PAD_SIZE);
secondaryKey->Export(authCert+AC_SPK_KEY_OFFSET);
authAlgorithm->RearrangeEndianess(authCert + AC_SPK_KEY_OFFSET + RSA_4096_N, RSA_4096_N_SIZE);
authAlgorithm->RearrangeEndianess(authCert + AC_SPK_KEY_OFFSET + RSA_4096_N_EXT, RSA_4096_N_EXT_SIZE);
authAlgorithm->RearrangeEndianess(authCert + AC_SPK_KEY_OFFSET + RSA_4096_E, RSA_4096_E_SIZE);
FillSha3Padding(authCert+AC_SPK_SHA3PAD_OFFSET, AC_SPK_SHA3PAD_SIZE);
memset(authCert+AC_ALLIGNMENT_OFFSET, 0, AC_ALLIGNMENT_SIZE);
CopySPKSignature(authCert+AC_SPK_SIGN_OFFSET);
certIndex++;
return acSection;
}
/******************************************************************************/
void VersalAuthenticationContext::Link(BootImage& bi, std::list<Section*> sections, AuthenticationCertificate* cert)
{
/* Copy bhSignature when bootloader */
memset(cert->section->Data + AC_BH_SIGN_OFFSET, 0, signatureLength); /*check*/
if (sections.front()->isBootloader)
{
CopybHSignature(bi, cert->section->Data + AC_BH_SIGN_OFFSET);
}
/* Copy meta header Signature when headers */
if (sections.front()->Name == "Headers")
{
CopyIHTSignature(bi, cert->section->Data + AC_BH_SIGN_OFFSET);
}
if (presignFile == "")
{
CopyPartitionSignature(bi, sections, cert->section->Data + AC_PARTITION_SIGN_OFFSET, cert->section);
}
else
{
int index = acIndex;
if (cert->section->index != 0)
{
index = cert->section->index;
}
GetPresign(presignFile, cert->section->Data + AC_PARTITION_SIGN_OFFSET, index);
acIndex++;
}
}
/******************************************************************************/
void VersalAuthenticationContext::CopybHSignature(BootImage& bi, uint8_t* ptr)
{
uint8_t* sha_hash_padded = new uint8_t[signatureLength];
uint8_t* bHsignaturetmp = new uint8_t[signatureLength];
memset(bHsignaturetmp, 0, signatureLength);
memset(sha_hash_padded, 0, signatureLength);
GenerateBHHash(bi, sha_hash_padded);
if (bi.options.DoGenerateHashes())
{
std::string hashfilename = "bootheader" + hash->GetHashFileExtension();
WritePaddedSHAFile(sha_hash_padded, hashfilename);
}
if (primaryKey->Loaded && primaryKey->isSecret)
{
LOG_TRACE("Creating Boot Header Signature");
authAlgorithm->RearrangeEndianess(sha_hash_padded, signatureLength);
authAlgorithm->CreateSignature(sha_hash_padded, (uint8_t*)secondaryKey, bHsignaturetmp);
authAlgorithm->RearrangeEndianess(bHsignaturetmp, signatureLength);
if (bhSignLoaded)
{
if (memcmp(bHsignature, bHsignaturetmp, signatureLength) != 0)
{
LOG_ERROR("Authentication Error !!!\n Loaded BH Signature does not match calculated BH Signature");
}
}
memcpy(ptr, bHsignaturetmp, signatureLength);
}
else if (bhSignLoaded)
{
memcpy(ptr, bHsignature, signatureLength);
}
else if (bi.options.DoGenerateHashes() && !bhSignLoaded)
{
static bool warningGiven = false;
if (!warningGiven)
{
LOG_WARNING("Either SSK or (bhsignature and presign) is needed to authenticate a boot image or generate partition hashes. Because they are not provided, the bootimage and partition hashes will not be usable. However, the boot header hash file generated can be used for offline signing");
warningGiven = true;
}
}
else
{
LOG_ERROR("Authentication Error !!!\n Either Secret Key Pair or BH signature file must be specified in BIF file");
}
// Clean up
if (sha_hash_padded)
{
delete[] sha_hash_padded;
}
if (bHsignaturetmp)
{
delete[] bHsignaturetmp;
}
LOG_TRACE("Boot Header Signature copied into Authentication Certificate");
}
/******************************************************************************/
void VersalAuthenticationContext::CopyIHTSignature(BootImage & bi, uint8_t * ptr)
{
uint8_t* sha_hash_padded = new uint8_t[signatureLength];
uint8_t* signaturetmp = new uint8_t[signatureLength];
memset(signaturetmp, 0, signatureLength);
memset(sha_hash_padded, 0, signatureLength);
GenerateIHTHash(bi, sha_hash_padded);
if (bi.options.DoGenerateHashes())
{
std::string hashfilename = "imageheadertable" + hash->GetHashFileExtension();
WritePaddedSHAFile(sha_hash_padded, hashfilename);
}
if (primaryKey->Loaded && primaryKey->isSecret)
{
LOG_TRACE("Creating Image Header Table Signature");
if (authAlgorithm->Type() != Authentication::ECDSA)
{
authAlgorithm->RearrangeEndianess(sha_hash_padded, signatureLength);
}
authAlgorithm->CreateSignature(sha_hash_padded, (uint8_t*)secondaryKey, signaturetmp);
if (authAlgorithm->Type() != Authentication::ECDSA)
{
authAlgorithm->RearrangeEndianess(signaturetmp, signatureLength);
}
/* if (bhSignLoaded)
{
if (memcmp(bHsignature, bHsignaturetmp, rsaKeyLength) != 0)
{
LOG_ERROR("Authentication Error !!!\n Loaded BH Signature does not match calculated BH Signature");
}
} */
memcpy(ptr, signaturetmp, signatureLength);
}
else if (bi.bifOptions->GetHeaderSignatureFile() != "")
{
GetPresign(bi.bifOptions->GetHeaderSignatureFile(), signaturetmp, 0);
memcpy(ptr, signaturetmp, signatureLength);
}
else if (bi.options.DoGenerateHashes() && (bi.bifOptions->GetHeaderSignatureFile() == ""))
{
static bool warningGiven = false;
if (!warningGiven)
{
LOG_WARNING("Either SSK or presign) is needed to authenticate a boot image or generate partition hashes. Because they are not provided, the bootimage and partition hashes will not be usable. However, the boot header hash file generated can be used for offline signing");
warningGiven = true;
}
}
else
{
LOG_ERROR("Authentication Error !!!\n Either Secret Key Pair or BH signature file must be specified in BIF file");
}
// Clean up
if (sha_hash_padded)
{
delete[] sha_hash_padded;
}
if (signaturetmp)
{
delete[] signaturetmp;
}
LOG_TRACE("Image Header Table Signature copied into Authentication Certificate");
}
/******************************************************************************/
void RSA4096Sha3PaddingAuthenticationAlgorithm::CreateSignature(const uint8_t* base, uint8_t* primaryKey, uint8_t* result0)
{
AuthenticationContext::SetAuthenticationKeyLength(RSA_4096_KEY_LENGTH);
RSA_Exponentiation(base, ((VersalKey*) primaryKey)->N, ((VersalKey*) primaryKey)->N_ext, ((VersalKey*) primaryKey)->D, result0);
}
/******************************************************************************/
void ECDSAAuthenticationAlgorithm::CreateSignature(const uint8_t* base, uint8_t* primaryKey, uint8_t* result0)
{
ECDSASignature(base, ((VersalKey*)primaryKey)->eckey, result0);
}
/******************************************************************************/
void ECDSAP521AuthenticationAlgorithm::CreateSignature(const uint8_t* base, uint8_t* primaryKey, uint8_t* result0)
{
ECDSASignature(base, ((VersalKey*)primaryKey)->eckey, result0);
}
/******************************************************************************/
void VersalAuthenticationContext::GenerateIHTHash(BootImage& bi, uint8_t* sha_hash_padded)
{
LOG_TRACE("Calculating Image Header Table Hash");
uint8_t* tmpIht = bi.imageHeaderTable->section->Data;
uint8_t* sha_hash = new uint8_t[hashLength];
hash->CalculateVersalHash(true,tmpIht, bi.imageHeaderTable->section->Length, sha_hash);
authAlgorithm->CreatePadding(sha_hash_padded, sha_hash, hashLength);
delete[] sha_hash;
}
/******************************************************************************/
void VersalAuthenticationContext::GenerateBHHash(BootImage& bi, uint8_t* sha_hash_padded)
{
LOG_TRACE("Calculating the Boot Header Hash");
/* Donot include SMAP data to calculate BH hash */
uint8_t* tmpBh = bi.bootHeader->section->Data + 0x10;
uint8_t* sha_hash = new uint8_t[hashLength];
hash->CalculateVersalHash(false, tmpBh, bi.bootHeader->section->Length, sha_hash);
authAlgorithm->CreatePadding(sha_hash_padded, sha_hash, hashLength);
delete[] sha_hash;
}
/******************************************************************************/
void VersalAuthenticationContext::GenerateSPKHash(uint8_t* sha_hash_padded)
{
LOG_TRACE("Calculating the SPK Hash");
uint8_t* spkFull = new uint8_t[VERSAL_ACKEY_STRUCT_SIZE];
uint8_t spkSHA3Padding[4] = { 0,0,0,0 };
FillSha3Padding(spkSHA3Padding, sizeof(spkSHA3Padding));
if (!secondaryKey->Loaded)
{
ParseSPKeyFile(spkFile);
}
secondaryKey->Export(spkFull);
hashLength = hash->GetHashLength();
uint8_t* shaHash = new uint8_t[hashLength];
uint32_t acHdr = authAlgorithm->GetAuthHeader();
acHdr |= ((hashType == AuthHash::Sha2) ? 0 : 1) << AC_HDR_SHA_2_3_BIT_SHIFT;
uint8_t* tempBuffer = new uint8_t[VERSAL_ACKEY_STRUCT_SIZE + sizeof(acHdr) + sizeof(spkIdentification) + sizeof(spkSHA3Padding)];
WriteLittleEndian32(tempBuffer, acHdr);
WriteLittleEndian32(tempBuffer + sizeof(acHdr), spkIdentification);
authAlgorithm->RearrangeEndianess(spkFull+ RSA_4096_N, RSA_4096_N_SIZE);
authAlgorithm->RearrangeEndianess(spkFull+ RSA_4096_N_EXT, RSA_4096_N_EXT_SIZE);
authAlgorithm->RearrangeEndianess(spkFull+RSA_4096_E, RSA_4096_E_SIZE);
memcpy(tempBuffer + sizeof(acHdr) + sizeof(spkIdentification), (uint8_t*)spkFull, VERSAL_ACKEY_STRUCT_SIZE);
memcpy(tempBuffer + sizeof(acHdr) + sizeof(spkIdentification) + VERSAL_ACKEY_STRUCT_SIZE, spkSHA3Padding, sizeof(spkSHA3Padding));
hash->CalculateVersalHash(false,(uint8_t*)tempBuffer, VERSAL_ACKEY_STRUCT_SIZE + sizeof(acHdr) + sizeof(spkIdentification) + sizeof(spkSHA3Padding), shaHash);
// Create PKCS padding
authAlgorithm->CreatePadding(sha_hash_padded, shaHash, hashLength);
delete[] shaHash;
delete[] tempBuffer;
}
/******************************************************************************/
void VersalAuthenticationContext::CopySPKSignature(uint8_t* ptr)
{
CreateSPKSignature();
LOG_TRACE("Copying the SPK signature into the Authentication Certificate");
memcpy(ptr, spksignature, signatureLength);
}
/******************************************************************************/
std::string VersalAuthenticationContext::GetCertificateName(std::string name)
{
if (certIndex != 0)
{
size_t x = name.find(".0");
if (std::string::npos != name.find(".0"))
{
name[x + 1] = (char)(name[x + 1] + certIndex); // nudge the '0' to '1' ... '9'.
}
}
return name;
}
/******************************************************************************/
void VersalAuthenticationContext::GeneratePPKHash(const std::string& filename)
{
int ppkSize = VERSAL_ACKEY_STRUCT_SIZE;
uint8_t* ppkTemp = new uint8_t[ppkSize];
hashLength = hash->GetHashLength();
primaryKey->Export(ppkTemp);
authAlgorithm->RearrangeEndianess(ppkTemp + RSA_4096_N, RSA_4096_N_SIZE);
authAlgorithm->RearrangeEndianess(ppkTemp + RSA_4096_N_EXT, RSA_4096_N_EXT_SIZE);
authAlgorithm->RearrangeEndianess(ppkTemp + RSA_4096_E, RSA_4096_E_SIZE);
uint8_t ppkSHA3Padding[12] = { 0 };
FillSha3Padding(ppkSHA3Padding, sizeof(ppkSHA3Padding));
uint8_t* tempBuffer = new uint8_t[ppkSize + sizeof(ppkSHA3Padding)];
memcpy(tempBuffer, (uint8_t*)ppkTemp, ppkSize);
memcpy(tempBuffer + ppkSize, ppkSHA3Padding, sizeof(ppkSHA3Padding));
uint8_t* ppkHash = new uint8_t[hashLength];
hash->CalculateVersalHash(false,tempBuffer, ppkSize + sizeof(ppkSHA3Padding), ppkHash);
FILE* filePtr;
if ((filePtr = fopen(filename.c_str(), "w")) == NULL)
{
LOG_ERROR("-efuseppkbits error !!! Failure writing to hash file %s", StringUtils::BaseName(filename).c_str());
}
/* For Versal, the efuses are available only for 256 bits.
So the upper 256 bits(0x20 bytes) of the hash is dumped, which will be programmed to efuse.*/
for (int index = 0; index < 0x20; index++)
{
fprintf(filePtr, "%02X", ppkHash[index]);
}
fprintf(filePtr, "\r\n");
fclose(filePtr);
LOG_INFO("Efuse PPK bits written to file %s successfully", filename.c_str());
delete[] tempBuffer;
}
/******************************************************************************/
void RSA4096Sha3PaddingAuthenticationAlgorithm::CreatePadding(uint8_t * signature, uint8_t * hash, uint8_t hashLength)
{
/* RSA PSS Padding */
char* rsaLocalENV = getenv("TEST_RSA_LOCAL");
int hLen = hashLength;
uint8_t padding1[PAD1_LENGTH];
memset(padding1, 0, PAD1_LENGTH);
uint8_t padding2[PAD2_LENGTH];
memset(padding2, 0, PAD2_LENGTH);
padding2[PAD2_LENGTH - 1] |= 0x01;
//Set the leftmost 8emLen - emBits bits of the leftmost octet in maskedDB to zero
int MSBits = ((SIGN_LENGTH_VERSAL * 8) - 1) & 0x7;
int emLen = SIGN_LENGTH_VERSAL;
if (MSBits == 0)
{
emLen--;
}
uint8_t *salt = NULL;
salt = new uint8_t[SALT_LENGTH];
if (rsaLocalENV != NULL) {
uint8_t defsalt[SALT_LENGTH] = { 0x71, 0x5d, 0x74, 0xeb, 0x06, 0xcb, 0x2f, 0xfa, 0xed, 0x09, 0x3d, 0xd3, 0x9b, 0xa0, 0xb8, 0x57, 0xa3, 0x01, 0xcd, 0xd7, 0x52, 0x2a, 0x82, 0xc9, 0x71, 0x06, 0x8a, 0x6b, 0xb1, 0x99, 0x83, 0x52, 0x49, 0x49, 0x2b, 0xdb, 0xc8, 0x50, 0x20, 0x5e, 0x44, 0xb2, 0xc8, 0xbe, 0xbf, 0x77, 0x98, 0x22 };
memcpy(salt, defsalt, SALT_LENGTH);
}
else {
RAND_bytes(salt, SALT_LENGTH);
}
//calculate mHash - hash on message(m)
uint8_t mHash[48] = { 0 };
memcpy(mHash, hash, 48);
//calculate mPad - add padding1 and salt to mHash
uint8_t mPad[104];
memset(mPad, 0, 104);
memcpy(mPad, padding1, PAD1_LENGTH);
memcpy(mPad + PAD1_LENGTH, mHash, 48);
memcpy(mPad + PAD1_LENGTH + 48, salt, SALT_LENGTH);
//calculate hash on mPad
uint8_t *m1;
uint8_t mPadHash[48];
m1 = AttachSHA3Padding(mPad, 104);
Versalcrypto_hash(mPadHash, m1, 208, false);
int maskedDBLen = emLen - hLen - 1; //463
uint8_t mask[463] = { 0 };
if (MaskGenerationFunction(mask, maskedDBLen, mPadHash, 48, EVP_sha384()) == -1)
{
LOG_ERROR("Internal Error : Mask generation failed during authentication.");
}
//DB Padding
uint8_t *DB;
DB = new uint8_t[463];
memset(DB, 0x0, 463);
memcpy(DB, padding2, PAD2_LENGTH);
memcpy(DB + PAD2_LENGTH, salt, 48);
uint8_t EM[512] = { 0 };
for (int i = 0; i < 463; i++)
{
EM[i] = (mask[i] ^ DB[i]);
}
if (MSBits == 0)
{
EM[0] = 0;
}
if (MSBits)
EM[0] &= 0xFF >> (8 - MSBits);
memcpy(EM + 463, mPadHash, 48);
EM[512 - 1] = 0xbc;
memcpy(signature, EM, 512);
delete[] m1;
delete[] DB;
delete[] salt;
}
/******************************************************************************/
void ECDSAAuthenticationAlgorithm::CreatePadding(uint8_t * signature, uint8_t * hash, uint8_t hashLength)
{
memcpy(signature, hash, hashLength);
}
/******************************************************************************/
void ECDSAP521AuthenticationAlgorithm::CreatePadding(uint8_t * signature, uint8_t * hash, uint8_t hashLength)
{
memcpy(signature, hash, hashLength);
}
/******************************************************************************/
void VersalAuthenticationContext::CopyPartitionSignature(BootImage& bi, std::list<Section*> sections, uint8_t* signatureBlock, Section* acSection)
{
LOG_TRACE("Copying the partition (%s) signature into Authentication Certificate", acSection->Name.c_str());
/* calculate hash first */
uint8_t* shaHash = new uint8_t[hashLength];
std::list<Section*>::iterator section = sections.begin();
size_t hashSecLen = (*section)->Length;
//If !bootloader AND !headers
if ((*section)->firstChunkSize != 0 && !((*section)->isBootloader && !bi.options.IsVersalNetSeries()) && (*section)->isPartitionData)
{
hashSecLen = (*section)->firstChunkSize + hashLength;
}
/* Update with AC and then Partition */
uint8_t *partitionAc = new uint8_t[hashSecLen + (acSection->Length - signatureLength)];
/* Update with authentication certificate except the last 256 bytes - which is the partition signature that we are calculating now.
Once calculated, the partition signature will sit there */
memcpy(partitionAc, acSection->Data, acSection->Length - signatureLength);
/* Update with Partition */
memcpy(partitionAc + acSection->Length - signatureLength, (*section)->Data, hashSecLen);
/* Calculate the final hash */
Versalcrypto_hash(shaHash, partitionAc, hashSecLen + (acSection->Length - signatureLength), !((*section)->isBootloader && !bi.options.IsVersalNetSeries()));
LOG_TRACE("Hash of %s (LE):", acSection->Name.c_str());
LOG_DUMP_BYTES(shaHash, hashLength);
if (bi.options.IsAuthOptimizationEnabled() && ((*section)->Name != "Headers") && !((*section)->isBootloader))
{
uint8_t* hash = new uint8_t[hashLength];
bi.hashTable.push_back(std::pair<uint32_t, uint8_t*>((*section)->partitionNum, hash));
memcpy(hash, shaHash, hashLength);
}
/* Create the PKCS padding for the hash */
uint8_t* shaHashPadded = new uint8_t[signatureLength];
memset(shaHashPadded, 0, signatureLength);
authAlgorithm->CreatePadding(shaHashPadded, shaHash, hashLength);
/* Generate hashes, if requested from command line option "-generate_hashes" */
if (bi.options.DoGenerateHashes())
{
std::string hashfilename = acSection->Name;
WritePaddedSHAFile(shaHashPadded, hashfilename);
}
authAlgorithm->RearrangeEndianess(shaHashPadded, signatureLength);
/* Now sign the hash */
authAlgorithm->CreateSignature(shaHashPadded, (uint8_t*)secondaryKey, signatureBlock);
authAlgorithm->RearrangeEndianess(signatureBlock, signatureLength);
LOG_TRACE("The partition signature is copied into Authentication Certificate");
/* Delete the temporarily created arrays */
delete[] shaHash;
delete[] shaHashPadded;
acIndex++;
}
/******************************************************************************/
void RSA4096Sha3PaddingAuthenticationAlgorithm::RearrangeEndianess(uint8_t *array, uint32_t size)
{
uint32_t lastIndex = size - 1;
char tempInt = 0;
// If array is NULL, return
if (!array)
{
return;
}
for (uint32_t loop = 0; loop <= (lastIndex / 2); loop++)
{
tempInt = array[loop];
array[loop] = array[lastIndex - loop];
array[lastIndex - loop] = tempInt;
}
}
/******************************************************************************/
void ECDSAAuthenticationAlgorithm::RearrangeEndianess(uint8_t *array, uint32_t size)
{
uint32_t lastIndex = size - 1;
char tempInt = 0;
// If array is NULL, return
if (!array)
{
return;
}
if (size != UDF_DATA_SIZE && (size != EC_P384_KEY_LENGTH))
{
return;
}
for (uint32_t loop = 0; loop <= (lastIndex / 2); loop++)
{
tempInt = array[loop];
array[loop] = array[lastIndex - loop];
array[lastIndex - loop] = tempInt;
}
}
/******************************************************************************/
void ECDSAP521AuthenticationAlgorithm::RearrangeEndianess(uint8_t *array, uint32_t size)
{
uint32_t lastIndex = size - 1;
char tempInt = 0;