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app.cc
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app.cc
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// Copyright 2018 Google LLC
//
// 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.
#include "app.h"
#include <cassert>
#include <endian.h>
#include <string.h>
#include "log.h"
#include "simulator.h"
#include "tss2_mu.h"
#include "openssl/digest.h"
namespace tpm_js {
namespace {
// IWG (TCG Infrastructure Work Group) default EK primary key policy.
// Copied from "TCG EK Credential Profile" specification, section 2.1.5,
// "Default EK Public Area Template"
const unsigned char kIwgPolicy[] = {
0x83, 0x71, 0x97, 0x67, 0x44, 0x84, 0xB3, 0xF8, 0x1A, 0x90, 0xCC,
0x8D, 0x46, 0xA5, 0xD7, 0x24, 0xFD, 0x52, 0xD7, 0x6E, 0x06, 0x52,
0x0B, 0x64, 0xF2, 0xA1, 0xDA, 0x1B, 0x33, 0x14, 0x69, 0xAA};
// Initializes a TPM2B structure to its max size:
// The size of the TPM2B structure minus the size of the '.size' field
template <typename T> constexpr size_t TPM2BStructSize() {
return sizeof(T) - sizeof(T::size);
}
// Marshals TPM2B structs.
template <typename T,
TSS2_RC (*Marshaler)(T const *, uint8_t *, size_t, size_t *)>
std::vector<uint8_t> TPM2BMarshal(T const *src) {
std::vector<uint8_t> buffer(sizeof(*src), 0);
TSS2_RC rc = Marshaler(src, buffer.data(), buffer.size(), nullptr);
assert(rc == TPM2_RC_SUCCESS);
return buffer;
}
// Unmarshals TPM2B structs.
template <typename T,
TSS2_RC (*Unmarshaler)(uint8_t const *, size_t, size_t *, T *)>
T TPM2BUnmarshal(const std::vector<uint8_t> &buffer) {
T result = {};
TSS2_RC rc = Unmarshaler(buffer.data(), buffer.size(), nullptr, &result);
assert(rc == TPM2_RC_SUCCESS);
return result;
}
std::string CapUintToString(UINT32 value) {
char result[5] = " ";
char *result_ptr = &result[0];
*((UINT32 *)result_ptr) = be32toh(value);
return std::string(&result[0], &result[4]);
}
TPM2B_PUBLIC GetDefaultEKTemplate() {
TPM2B_PUBLIC in_public = {};
in_public.publicArea.type = TPM2_ALG_RSA;
in_public.publicArea.nameAlg = TPM2_ALG_SHA256;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_RESTRICTED;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_ADMINWITHPOLICY;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_DECRYPT;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_FIXEDTPM;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_FIXEDPARENT;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_SENSITIVEDATAORIGIN;
in_public.publicArea.authPolicy.size =
sizeof(kIwgPolicy) / sizeof(kIwgPolicy[0]);
memcpy(&in_public.publicArea.authPolicy.buffer, kIwgPolicy,
in_public.publicArea.authPolicy.size);
in_public.publicArea.parameters.rsaDetail.symmetric.algorithm = TPM2_ALG_AES;
in_public.publicArea.parameters.rsaDetail.symmetric.keyBits.aes = 128;
in_public.publicArea.parameters.rsaDetail.symmetric.mode.aes = TPM2_ALG_CFB;
in_public.publicArea.parameters.rsaDetail.scheme.scheme = TPM2_ALG_NULL;
in_public.publicArea.parameters.rsaDetail.keyBits = 2048;
in_public.publicArea.parameters.rsaDetail.exponent = 0;
in_public.publicArea.unique.rsa.size = 256;
return in_public;
}
TPM2B_PUBLIC GetPublicRSA(int restricted, int decrypt, int sign,
const std::vector<uint8_t> &auth_policy,
const TPM2B_DIGEST *unique) {
TPM2B_PUBLIC in_public = {};
in_public.publicArea.type = TPM2_ALG_RSA;
in_public.publicArea.nameAlg = TPM2_ALG_SHA256;
if (restricted) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_RESTRICTED;
}
if (auth_policy.size() == 0) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_USERWITHAUTH;
}
if (decrypt) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_DECRYPT;
}
if (sign) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_SIGN_ENCRYPT;
}
in_public.publicArea.objectAttributes |= TPMA_OBJECT_FIXEDTPM;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_FIXEDPARENT;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_SENSITIVEDATAORIGIN;
in_public.publicArea.authPolicy.size = auth_policy.size();
assert(auth_policy.size() <= sizeof(in_public.publicArea.authPolicy.buffer));
memcpy(in_public.publicArea.authPolicy.buffer, auth_policy.data(),
auth_policy.size());
if (sign) {
in_public.publicArea.parameters.rsaDetail.symmetric.algorithm =
TPM2_ALG_NULL;
} else {
in_public.publicArea.parameters.rsaDetail.symmetric.algorithm =
TPM2_ALG_AES;
}
in_public.publicArea.parameters.rsaDetail.symmetric.keyBits.aes = 128;
in_public.publicArea.parameters.rsaDetail.symmetric.mode.aes = TPM2_ALG_CFB;
if (sign && !decrypt) {
in_public.publicArea.parameters.rsaDetail.scheme.scheme = TPM2_ALG_RSASSA;
in_public.publicArea.parameters.rsaDetail.scheme.details.rsassa.hashAlg =
TPM2_ALG_SHA256;
} else {
in_public.publicArea.parameters.rsaDetail.scheme.scheme = TPM2_ALG_NULL;
}
in_public.publicArea.parameters.rsaDetail.keyBits = 2048;
in_public.publicArea.parameters.rsaDetail.exponent = 0;
in_public.publicArea.unique.rsa.size = 0;
if (unique) {
assert(unique->size < sizeof(in_public.publicArea.unique.rsa.buffer));
in_public.publicArea.unique.rsa.size = unique->size;
memcpy(in_public.publicArea.unique.rsa.buffer, unique->buffer,
unique->size);
}
return in_public;
}
TPM2B_PUBLIC GetPublicECC(int restricted, int decrypt, int sign,
const std::vector<uint8_t> &auth_policy,
const TPM2B_DIGEST *unique) {
TPM2B_PUBLIC in_public = {};
in_public.publicArea.type = TPM2_ALG_ECC;
in_public.publicArea.nameAlg = TPM2_ALG_SHA256;
if (restricted) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_RESTRICTED;
}
if (auth_policy.size() == 0) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_USERWITHAUTH;
}
if (decrypt) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_DECRYPT;
}
if (sign) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_SIGN_ENCRYPT;
}
in_public.publicArea.objectAttributes |= TPMA_OBJECT_FIXEDTPM;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_FIXEDPARENT;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_SENSITIVEDATAORIGIN;
in_public.publicArea.authPolicy.size = auth_policy.size();
assert(auth_policy.size() <= sizeof(in_public.publicArea.authPolicy.buffer));
memcpy(in_public.publicArea.authPolicy.buffer, auth_policy.data(),
auth_policy.size());
if (sign) {
in_public.publicArea.parameters.eccDetail.symmetric.algorithm =
TPM2_ALG_NULL;
} else {
in_public.publicArea.parameters.eccDetail.symmetric.algorithm =
TPM2_ALG_AES;
}
in_public.publicArea.parameters.eccDetail.symmetric.keyBits.aes = 128;
in_public.publicArea.parameters.eccDetail.symmetric.mode.aes = TPM2_ALG_CFB;
if (sign) {
in_public.publicArea.parameters.eccDetail.scheme.scheme = TPM2_ALG_ECDSA;
in_public.publicArea.parameters.eccDetail.scheme.details.ecdsa.hashAlg =
TPM2_ALG_SHA256;
} else {
in_public.publicArea.parameters.eccDetail.scheme.scheme = TPM2_ALG_NULL;
}
in_public.publicArea.parameters.eccDetail.curveID = TPM2_ECC_NIST_P256;
in_public.publicArea.parameters.eccDetail.kdf.scheme = TPM2_ALG_NULL;
in_public.publicArea.unique.ecc.x.size = 0;
in_public.publicArea.unique.ecc.y.size = 0;
if (unique) {
assert(unique->size < sizeof(in_public.publicArea.unique.ecc.x.buffer));
in_public.publicArea.unique.ecc.x.size = unique->size;
memcpy(in_public.publicArea.unique.ecc.x.buffer, unique->buffer,
unique->size);
}
return in_public;
}
TPM2B_PUBLIC GetPublicSYM(int restricted, int decrypt, int sign,
const std::vector<uint8_t> &auth_policy,
const TPM2B_DIGEST *unique) {
TPM2B_PUBLIC in_public = {};
in_public.publicArea.type = TPM2_ALG_SYMCIPHER;
in_public.publicArea.nameAlg = TPM2_ALG_SHA256;
if (restricted) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_RESTRICTED;
}
if (auth_policy.size() == 0) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_USERWITHAUTH;
}
if (decrypt) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_DECRYPT;
}
if (sign) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_SIGN_ENCRYPT;
}
in_public.publicArea.objectAttributes |= TPMA_OBJECT_FIXEDTPM;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_FIXEDPARENT;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_SENSITIVEDATAORIGIN;
in_public.publicArea.authPolicy.size = auth_policy.size();
assert(auth_policy.size() <= sizeof(in_public.publicArea.authPolicy.buffer));
memcpy(in_public.publicArea.authPolicy.buffer, auth_policy.data(),
auth_policy.size());
in_public.publicArea.parameters.symDetail.sym.algorithm = TPM2_ALG_AES;
in_public.publicArea.parameters.symDetail.sym.keyBits.sym = 128;
in_public.publicArea.parameters.symDetail.sym.mode.sym = TPM2_ALG_CFB;
in_public.publicArea.unique.sym.size = 0;
if (unique) {
assert(unique->size < sizeof(in_public.publicArea.unique.sym.buffer));
in_public.publicArea.unique.sym.size = unique->size;
memcpy(in_public.publicArea.unique.sym.buffer, unique->buffer,
unique->size);
}
return in_public;
}
TPM2B_PUBLIC GetPublicHASH(int restricted, int decrypt, int sign,
const std::vector<uint8_t> &auth_policy,
const TPM2B_DIGEST *unique,
const std::string &sensitive_data) {
// When sealing sensitive data always clear restricted, decrypt and sign.
// Additionally, clear data-origin since the TPM cannot be the data source.
if (sensitive_data.size()) {
restricted = decrypt = sign = 0;
}
TPM2B_PUBLIC in_public = {};
in_public.publicArea.type = TPM2_ALG_KEYEDHASH;
in_public.publicArea.nameAlg = TPM2_ALG_SHA256;
if (restricted) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_RESTRICTED;
}
if (auth_policy.size() == 0) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_USERWITHAUTH;
}
if (decrypt) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_DECRYPT;
}
if (sign) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_SIGN_ENCRYPT;
}
in_public.publicArea.objectAttributes |= TPMA_OBJECT_FIXEDTPM;
in_public.publicArea.objectAttributes |= TPMA_OBJECT_FIXEDPARENT;
if (sensitive_data.size() == 0) {
in_public.publicArea.objectAttributes |= TPMA_OBJECT_SENSITIVEDATAORIGIN;
}
in_public.publicArea.authPolicy.size = auth_policy.size();
assert(auth_policy.size() <= sizeof(in_public.publicArea.authPolicy.buffer));
memcpy(in_public.publicArea.authPolicy.buffer, auth_policy.data(),
auth_policy.size());
if (sign) {
in_public.publicArea.parameters.keyedHashDetail.scheme.scheme =
TPM2_ALG_XOR;
in_public.publicArea.parameters.keyedHashDetail.scheme.details.exclusiveOr
.hashAlg = TPM2_ALG_SHA256;
in_public.publicArea.parameters.keyedHashDetail.scheme.details.exclusiveOr
.kdf = TPM2_ALG_KDF1_SP800_108;
} else {
in_public.publicArea.parameters.keyedHashDetail.scheme.scheme =
TPM2_ALG_NULL;
}
in_public.publicArea.unique.keyedHash.size = 0;
if (unique) {
assert(unique->size < sizeof(in_public.publicArea.unique.keyedHash.buffer));
in_public.publicArea.unique.keyedHash.size = unique->size;
memcpy(in_public.publicArea.unique.keyedHash.buffer, unique->buffer,
unique->size);
}
return in_public;
}
// Builds NV space attributes for EK certificate.
TPMA_NV BuildNvSpaceAttributes() {
TPMA_NV attributes = 0;
// EK Credential attributes specified in the "TCG PC Client Platform, TPM
// Profile (PTP) Specification" document.
// REQUIRED: Writeable under platform auth.
attributes |= TPMA_NV_PPWRITE;
// OPTIONAL: Write-once; space must be deleted to be re-written.
attributes |= TPMA_NV_WRITEDEFINE;
// REQUIRED: Space created with platform auth.
attributes |= TPMA_NV_PLATFORMCREATE;
// REQUIRED: Readable under empty password?
attributes |= TPMA_NV_AUTHREAD;
// REQUIRED: Disable dictionary attack protection.
attributes |= TPMA_NV_NO_DA;
// OPTIONAL: Ownder readable.
attributes |= TPMA_NV_OWNERREAD;
// OPTIONAL: Readable under platform auth.
attributes |= TPMA_NV_PPREAD;
return attributes;
}
TPM2B_SENSITIVE_CREATE BuildInSensitive(const std::string &user_auth,
const std::string &sensitive_data) {
TPM2B_SENSITIVE_CREATE in_sensitive = {};
assert(user_auth.size() <= sizeof(in_sensitive.sensitive.userAuth.buffer));
in_sensitive.sensitive.userAuth.size = user_auth.size();
memcpy(in_sensitive.sensitive.userAuth.buffer, user_auth.c_str(),
user_auth.size());
assert(sensitive_data.size() <= sizeof(in_sensitive.sensitive.data.buffer));
in_sensitive.sensitive.data.size = sensitive_data.size();
memcpy(in_sensitive.sensitive.data.buffer, sensitive_data.c_str(),
sensitive_data.size());
return in_sensitive;
}
TPM2B_DIGEST HashString(const std::string &str, const EVP_MD *evpmd) {
EVP_MD_CTX mdctx;
TPM2B_DIGEST digest = {};
unsigned int len = sizeof(digest.buffer);
EVP_DigestInit(&mdctx, evpmd);
EVP_DigestUpdate(&mdctx, str.data(), str.size());
EVP_DigestFinal(&mdctx, digest.buffer, &len);
digest.size = len;
return digest;
}
} // namespace
App *App::Get() {
static App *instance = new App();
return instance;
}
App::App()
: tss_(&Simulator::ExecuteCommand), sessions_data_({}),
sessions_data_out_({}) {
ClearSessionData();
}
App::~App() {}
void App::ClearSessionData() {
sessions_data_.auths[0].sessionHandle = TPM2_RS_PW;
sessions_data_.auths[0].nonce.size = 0;
sessions_data_.auths[0].hmac.size = 0;
sessions_data_.auths[0].sessionAttributes = 0;
sessions_data_.auths[1].sessionHandle = TPM2_RS_PW;
sessions_data_.auths[1].nonce.size = 0;
sessions_data_.auths[1].hmac.size = 0;
sessions_data_.auths[1].sessionAttributes = 0;
sessions_data_.count = 1;
sessions_data_out_.count = 1;
}
int App::Startup() {
LOG1("Startup\n");
return Tss2_Sys_Startup(tss_.GetSysContext(), TPM2_SU_CLEAR);
}
int App::Shutdown() {
LOG1("Shutdown\n");
return Tss2_Sys_Shutdown(tss_.GetSysContext(),
/*cmdAuthsArray=*/nullptr, TPM2_SU_CLEAR,
/*rspAuthsArray=*/nullptr);
}
int App::Clear() {
return Tss2_Sys_Clear(tss_.GetSysContext(), TPM2_RH_PLATFORM,
/*cmdAuthsArray=*/&sessions_data_,
/*rspAuthsArray=*/nullptr);
}
int App::ExtendPcr(int pcr, const std::string &str) {
LOG1("ExtendPcr '%s'\n", str.c_str());
TPM2B_DIGEST message = HashString(str, EVP_sha256());
TPML_DIGEST_VALUES digests = {};
digests.count = 1;
digests.digests[0].hashAlg = TPM2_ALG_SHA256;
memcpy(digests.digests[0].digest.sha256, message.buffer, message.size);
TPM2_RC rc = Tss2_Sys_PCR_Extend(tss_.GetSysContext(), pcr, &sessions_data_,
&digests, /*rspAuthsArray=*/nullptr);
return rc;
}
std::vector<uint8_t> App::GetRandom(int num_bytes) {
LOG1("GetRandom\n");
TPM2B_DIGEST random_bytes = {
TPM2BStructSize<TPM2B_DIGEST>(),
};
TPM2_RC rc =
Tss2_Sys_GetRandom(tss_.GetSysContext(), /*cmdAuthsArray=*/nullptr,
num_bytes, &random_bytes, /*rspAuthsArray=*/nullptr);
assert(rc == TPM2_RC_SUCCESS);
return std::vector<uint8_t>(random_bytes.buffer,
random_bytes.buffer + random_bytes.size);
}
int App::SelfTest() {
LOG1("SelfTest\n");
TPM2_RC rc =
Tss2_Sys_SelfTest(tss_.GetSysContext(), /*cmdAuthsArray=*/nullptr,
/*fullTest=*/TPM2_YES, /*rspAuthsArray=*/nullptr);
return rc;
}
TpmProperties App::GetTpmProperties() {
LOG1("GetTpmProperties\n");
TpmProperties result = {};
// Get spec version.
TPMS_CAPABILITY_DATA capability_data =
GetCapability(TPM2_CAP_TPM_PROPERTIES, TPM2_PT_REVISION);
assert(capability_data.data.tpmProperties.count == 1);
result.spec_version = capability_data.data.tpmProperties.tpmProperty[0].value;
// Get manufacturer ID.
capability_data =
GetCapability(TPM2_CAP_TPM_PROPERTIES, TPM2_PT_MANUFACTURER);
assert(capability_data.data.tpmProperties.count == 1);
result.manufacturer_id =
CapUintToString(capability_data.data.tpmProperties.tpmProperty[0].value);
return result;
}
TPMS_CAPABILITY_DATA App::GetCapability(TPM2_CAP capability, UINT32 property) {
TPMS_CAPABILITY_DATA capability_data = {};
TPMI_YES_NO more;
TPM2_RC rc = Tss2_Sys_GetCapability(
tss_.GetSysContext(), /*cmdAuthsArray=*/nullptr, capability, property,
/*propertyCount=*/1, &more, &capability_data, /*rspAuthsArray=*/nullptr);
assert(rc == TPM2_RC_SUCCESS);
return capability_data;
}
int App::TestHashParam(int hash_algo) {
LOG1("TestHashParam %d\n", hash_algo);
TPMT_PUBLIC_PARMS params = {};
params.type = TPM2_ALG_KEYEDHASH;
params.parameters.keyedHashDetail.scheme.scheme = TPM2_ALG_HMAC;
params.parameters.keyedHashDetail.scheme.details.hmac.hashAlg = hash_algo;
return Tss2_Sys_TestParms(tss_.GetSysContext(),
/*cmdAuthsArray=*/nullptr, ¶ms,
/*rspAuthsArray=*/nullptr);
}
CreatePrimaryResult
App::CreatePrimaryFromTemplate(int hierarchy,
const TPM2B_SENSITIVE_CREATE &in_sensitive,
const TPM2B_PUBLIC &in_public) {
TPM2B_PUBLIC out_public = {};
TPM2B_DATA outside_info;
outside_info.size = 0;
TPML_PCR_SELECTION creation_pcr;
creation_pcr.count = 0;
TPM2B_CREATION_DATA creation_data = {
.size = TPM2BStructSize<TPM2B_CREATION_DATA>(),
};
creation_data.size = 0;
TPM2B_DIGEST creation_hash = {
.size = TPM2BStructSize<TPM2B_DIGEST>(),
};
TPMT_TK_CREATION creation_ticket = {
0, 0,
.digest = {
.size = TPM2BStructSize<TPM2B_DIGEST>(),
}};
TPM2B_NAME name = {
.size = TPM2BStructSize<TPM2B_NAME>(),
};
CreatePrimaryResult result = {};
result.rc = Tss2_Sys_CreatePrimary(
tss_.GetSysContext(), hierarchy, &sessions_data_, &in_sensitive,
&in_public, &outside_info, &creation_pcr, &result.handle, &out_public,
&creation_data, &creation_hash, &creation_ticket, &name,
&sessions_data_out_);
if (result.rc == TPM2_RC_SUCCESS) {
if (in_public.publicArea.type == TPM2_ALG_RSA) {
result.rsa_public_n =
std::vector<uint8_t>(out_public.publicArea.unique.rsa.buffer,
out_public.publicArea.unique.rsa.buffer +
out_public.publicArea.unique.rsa.size);
} else if (in_public.publicArea.type == TPM2_ALG_ECC) {
result.ecc_public_x =
std::vector<uint8_t>(out_public.publicArea.unique.ecc.x.buffer,
out_public.publicArea.unique.ecc.x.buffer +
out_public.publicArea.unique.ecc.x.size);
result.ecc_public_y =
std::vector<uint8_t>(out_public.publicArea.unique.ecc.y.buffer,
out_public.publicArea.unique.ecc.y.buffer +
out_public.publicArea.unique.ecc.y.size);
result.ecc_curve_id = out_public.publicArea.parameters.eccDetail.curveID;
}
result.name = std::vector<uint8_t>(name.name, name.name + name.size);
result.parent_name =
std::vector<uint8_t>(creation_data.creationData.parentName.name,
creation_data.creationData.parentName.name +
creation_data.creationData.parentName.size);
result.parent_qualified_name = std::vector<uint8_t>(
creation_data.creationData.parentQualifiedName.name,
creation_data.creationData.parentQualifiedName.name +
creation_data.creationData.parentQualifiedName.size);
}
return result;
}
CreatePrimaryResult
App::CreatePrimary(int hierarchy, int type, int restricted, int decrypt,
int sign, const std::string &unique,
const std::string &user_auth,
const std::string &sensitive_data,
const std::vector<uint8_t> &auth_policy) {
LOG1("CreatePrimary %x %d '%s'\n", hierarchy, type, unique.c_str());
assert((hierarchy == TPM2_RH_NULL) || (hierarchy == TPM2_RH_ENDORSEMENT) ||
(hierarchy == TPM2_RH_PLATFORM) || (hierarchy == TPM2_RH_OWNER));
assert((type == TPM2_ALG_RSA) || (type == TPM2_ALG_ECC) ||
(type == TPM2_ALG_SYMCIPHER) || (type == TPM2_ALG_KEYEDHASH));
TPM2B_DIGEST unique_digest = HashString(unique, EVP_sha256());
TPM2B_PUBLIC in_public = {};
if (type == TPM2_ALG_RSA) {
in_public =
GetPublicRSA(restricted, decrypt, sign, auth_policy, &unique_digest);
} else if (type == TPM2_ALG_ECC) {
in_public =
GetPublicECC(restricted, decrypt, sign, auth_policy, &unique_digest);
} else if (type == TPM2_ALG_SYMCIPHER) {
in_public =
GetPublicSYM(restricted, decrypt, sign, auth_policy, &unique_digest);
} else /* type == TPM2_ALG_KEYEDHASH*/ {
in_public = GetPublicHASH(restricted, decrypt, sign, auth_policy,
&unique_digest, sensitive_data);
}
TPM2B_SENSITIVE_CREATE in_sensitive =
BuildInSensitive(user_auth, sensitive_data);
return CreatePrimaryFromTemplate(hierarchy, in_sensitive, in_public);
}
CreatePrimaryResult App::CreatePrimaryEndorsementKey() {
TPM2B_SENSITIVE_CREATE in_sensitive = {};
return CreatePrimaryFromTemplate(TPM2_RH_ENDORSEMENT, in_sensitive,
GetDefaultEKTemplate());
}
CreateResult App::Create(uint32_t parent_handle, int type, int restricted,
int decrypt, int sign, const std::string &user_auth,
const std::string &sensitive_data,
const std::vector<uint8_t> &auth_policy) {
LOG1("Create %x %d\n", parent_handle, type);
assert((type == TPM2_ALG_RSA) || (type == TPM2_ALG_ECC) ||
(type == TPM2_ALG_SYMCIPHER) || (type == TPM2_ALG_KEYEDHASH));
TPM2B_PUBLIC in_public = {};
if (type == TPM2_ALG_RSA) {
in_public = GetPublicRSA(restricted, decrypt, sign, auth_policy, nullptr);
} else if (type == TPM2_ALG_ECC) {
in_public = GetPublicECC(restricted, decrypt, sign, auth_policy, nullptr);
} else if (type == TPM2_ALG_SYMCIPHER) {
in_public = GetPublicSYM(restricted, decrypt, sign, auth_policy, nullptr);
} else /* type == TPM2_ALG_KEYEDHASH*/ {
in_public = GetPublicHASH(restricted, decrypt, sign, auth_policy, nullptr,
sensitive_data);
}
TPM2B_PUBLIC out_public = {};
TPM2B_SENSITIVE_CREATE in_sensitive =
BuildInSensitive(user_auth, sensitive_data);
TPM2B_DATA outside_info;
outside_info.size = 0;
TPML_PCR_SELECTION creation_pcr;
creation_pcr.count = 0;
TPM2B_PRIVATE out_private = {
.size = TPM2BStructSize<TPM2B_PRIVATE>(),
};
TPM2B_CREATION_DATA creation_data = {
.size = TPM2BStructSize<TPM2B_CREATION_DATA>(),
};
creation_data.size = 0;
TPM2B_DIGEST creation_hash = {
.size = TPM2BStructSize<TPM2B_DIGEST>(),
};
TPMT_TK_CREATION creation_ticket = {
0, 0,
.digest = {
.size = TPM2BStructSize<TPM2B_DIGEST>(),
}};
CreateResult result = {};
result.rc = Tss2_Sys_Create(
tss_.GetSysContext(), parent_handle, &sessions_data_, &in_sensitive,
&in_public, &outside_info, &creation_pcr, &out_private, &out_public,
&creation_data, &creation_hash, &creation_ticket, &sessions_data_out_);
if (result.rc == TPM2_RC_SUCCESS) {
if (type == TPM2_ALG_RSA) {
result.rsa_public_n =
std::vector<uint8_t>(out_public.publicArea.unique.rsa.buffer,
out_public.publicArea.unique.rsa.buffer +
out_public.publicArea.unique.rsa.size);
} else if (type == TPM2_ALG_ECC) {
result.ecc_public_x =
std::vector<uint8_t>(out_public.publicArea.unique.ecc.x.buffer,
out_public.publicArea.unique.ecc.x.buffer +
out_public.publicArea.unique.ecc.x.size);
result.ecc_public_y =
std::vector<uint8_t>(out_public.publicArea.unique.ecc.y.buffer,
out_public.publicArea.unique.ecc.y.buffer +
out_public.publicArea.unique.ecc.y.size);
result.ecc_curve_id = out_public.publicArea.parameters.eccDetail.curveID;
}
result.tpm2b_private =
TPM2BMarshal<TPM2B_PRIVATE, Tss2_MU_TPM2B_PRIVATE_Marshal>(
&out_private);
result.tpm2b_public =
TPM2BMarshal<TPM2B_PUBLIC, Tss2_MU_TPM2B_PUBLIC_Marshal>(&out_public);
result.parent_name =
std::vector<uint8_t>(creation_data.creationData.parentName.name,
creation_data.creationData.parentName.name +
creation_data.creationData.parentName.size);
result.parent_qualified_name = std::vector<uint8_t>(
creation_data.creationData.parentQualifiedName.name,
creation_data.creationData.parentQualifiedName.name +
creation_data.creationData.parentQualifiedName.size);
}
return result;
}
LoadResult App::Load(uint32_t parent_handle,
const std::vector<uint8_t> &tpm2b_private,
const std::vector<uint8_t> &tpm2b_public) {
LOG1("Load %x\n", parent_handle);
TPM2B_PRIVATE in_private =
TPM2BUnmarshal<TPM2B_PRIVATE, Tss2_MU_TPM2B_PRIVATE_Unmarshal>(
tpm2b_private);
TPM2B_PUBLIC in_public =
TPM2BUnmarshal<TPM2B_PUBLIC, Tss2_MU_TPM2B_PUBLIC_Unmarshal>(
tpm2b_public);
TPM2B_NAME name = {
.size = TPM2BStructSize<TPM2B_NAME>(),
};
LoadResult result = {};
result.rc = Tss2_Sys_Load(tss_.GetSysContext(), parent_handle,
&sessions_data_, &in_private, &in_public,
&result.handle, &name, &sessions_data_out_);
if (result.rc == TPM2_RC_SUCCESS) {
result.name = std::vector<uint8_t>(name.name, name.name + name.size);
}
return result;
}
int App::FlushContext(uint32_t handle) {
LOG1("FlushContext %x\n", handle);
return Tss2_Sys_FlushContext(tss_.GetSysContext(), handle);
}
SignResult App::Sign(uint32_t key_handle, int type, const std::string &str) {
LOG1("Sign %x '%s'\n", key_handle, str.c_str());
assert((type == TPM2_ALG_RSA) || (type == TPM2_ALG_ECC));
TPM2B_DIGEST message = HashString(str, EVP_sha256());
// Use the object's default scheme.
TPMT_SIG_SCHEME scheme = {};
if (type == TPM2_ALG_RSA) {
scheme.scheme = TPM2_ALG_RSASSA;
scheme.details.rsassa.hashAlg = TPM2_ALG_SHA256;
} else { /* type == TPM2_ALG_ECC */
scheme.scheme = TPM2_ALG_ECDSA;
scheme.details.ecdsa.hashAlg = TPM2_ALG_SHA256;
}
TPMT_TK_HASHCHECK validation = {};
validation.tag = TPM2_ST_HASHCHECK;
validation.hierarchy = TPM2_RH_NULL;
validation.digest.size = 0;
TPMT_SIGNATURE signature = {};
SignResult result;
result.rc =
Tss2_Sys_Sign(tss_.GetSysContext(), key_handle, &sessions_data_, &message,
&scheme, &validation, &signature, &sessions_data_out_);
if (result.rc == TPM2_RC_SUCCESS) {
result.sign_algo = signature.sigAlg;
if (type == TPM2_ALG_RSA) {
result.hash_algo = signature.signature.rsassa.hash;
result.rsa_ssa_sig =
std::vector<uint8_t>(signature.signature.rsassa.sig.buffer,
signature.signature.rsassa.sig.buffer +
signature.signature.rsassa.sig.size);
} else { /* type == TPM2_ALG_ECC */
result.hash_algo = signature.signature.ecdsa.hash;
result.ecdsa_r =
std::vector<uint8_t>(signature.signature.ecdsa.signatureR.buffer,
signature.signature.ecdsa.signatureR.buffer +
signature.signature.ecdsa.signatureR.size);
result.ecdsa_s =
std::vector<uint8_t>(signature.signature.ecdsa.signatureS.buffer,
signature.signature.ecdsa.signatureS.buffer +
signature.signature.ecdsa.signatureS.size);
}
}
return result;
}
int App::VerifySignature(uint32_t key_handle, const std::string &str,
const SignResult &in_signature) {
LOG1("VerifySignature %x '%s'\n", key_handle, str.c_str());
TPM2B_DIGEST message = HashString(str, EVP_sha256());
TPMT_SIGNATURE signature = {};
signature.sigAlg = in_signature.sign_algo;
if (signature.sigAlg == TPM2_ALG_RSASSA) {
signature.signature.rsassa.hash = in_signature.hash_algo;
memcpy(signature.signature.rsassa.sig.buffer,
in_signature.rsa_ssa_sig.data(), in_signature.rsa_ssa_sig.size());
signature.signature.rsassa.sig.size = in_signature.rsa_ssa_sig.size();
} else if (signature.sigAlg == TPM2_ALG_ECDSA) {
signature.signature.ecdsa.hash = in_signature.hash_algo;
memcpy(signature.signature.ecdsa.signatureR.buffer,
in_signature.ecdsa_r.data(), in_signature.ecdsa_r.size());
signature.signature.ecdsa.signatureR.size = in_signature.ecdsa_r.size();
memcpy(signature.signature.ecdsa.signatureS.buffer,
in_signature.ecdsa_s.data(), in_signature.ecdsa_s.size());
signature.signature.ecdsa.signatureS.size = in_signature.ecdsa_s.size();
}
TPMT_TK_VERIFIED validation = {};
return Tss2_Sys_VerifySignature(tss_.GetSysContext(), key_handle,
/*cmdAuthsArray=*/nullptr, &message,
&signature, &validation, &sessions_data_out_);
}
std::vector<uint8_t> App::Encrypt(uint32_t key_handle,
const std::vector<uint8_t> &message) {
return EncryptDecrypt(key_handle, message, /*decrypt=*/false);
}
std::vector<uint8_t> App::Decrypt(uint32_t key_handle,
const std::vector<uint8_t> &message) {
return EncryptDecrypt(key_handle, message, /*decrypt=*/true);
}
std::vector<uint8_t> App::EncryptDecrypt(uint32_t key_handle,
const std::vector<uint8_t> &message,
bool decrypt) {
TPM2B_IV iv_in = {
.size = TPM2BStructSize<TPM2B_IV>(),
};
TPM2B_IV iv_out = {
.size = TPM2BStructSize<TPM2B_IV>(),
};
TPM2B_MAX_BUFFER data_in = {};
data_in.size = message.size();
assert(message.size() <= sizeof(data_in.buffer));
memcpy(data_in.buffer, message.data(), message.size());
TPM2B_MAX_BUFFER data_out = {
.size = TPM2BStructSize<TPM2B_MAX_BUFFER>(),
};
TPM2_RC rc =
Tss2_Sys_EncryptDecrypt(tss_.GetSysContext(), key_handle, &sessions_data_,
(decrypt ? TPM2_YES : TPM2_NO),
/*mode=*/TPM2_ALG_NULL, &iv_in, &data_in,
&data_out, &iv_out, &sessions_data_out_);
assert(rc == TPM2_RC_SUCCESS);
return std::vector<uint8_t>(data_out.buffer, data_out.buffer + data_out.size);
}
std::vector<uint8_t> App::RSAEncrypt(uint32_t key_handle,
const std::vector<uint8_t> &message) {
TPM2B_PUBLIC_KEY_RSA data_in = {};
data_in.size = message.size();
assert(message.size() <= sizeof(data_in.buffer));
memcpy(data_in.buffer, message.data(), message.size());
TPMT_RSA_DECRYPT scheme = {
.scheme = TPM2_ALG_RSAES,
};
TPM2B_DATA outside_info;
outside_info.size = 0;
TPM2B_PUBLIC_KEY_RSA data_out = {
.size = TPM2BStructSize<TPM2B_PUBLIC_KEY_RSA>(),
};
TPM2_RC rc =
Tss2_Sys_RSA_Encrypt(tss_.GetSysContext(), key_handle,
/*cmdAuthsArray=*/nullptr, &data_in, &scheme,
&outside_info, &data_out, /*rspAuthsArray=*/nullptr);
assert(rc == TPM2_RC_SUCCESS);
return std::vector<uint8_t>(data_out.buffer, data_out.buffer + data_out.size);
}
std::vector<uint8_t> App::RSADecrypt(uint32_t key_handle,
const std::vector<uint8_t> &message) {
TPM2B_PUBLIC_KEY_RSA data_in = {};
data_in.size = message.size();
assert(message.size() <= sizeof(data_in.buffer));
memcpy(data_in.buffer, message.data(), message.size());
TPMT_RSA_DECRYPT scheme = {
.scheme = TPM2_ALG_RSAES,
};
TPM2B_DATA outside_info;
outside_info.size = 0;
TPM2B_PUBLIC_KEY_RSA data_out = {
.size = TPM2BStructSize<TPM2B_PUBLIC_KEY_RSA>(),
};
TPM2_RC rc = Tss2_Sys_RSA_Decrypt(
tss_.GetSysContext(), key_handle, &sessions_data_, &data_in, &scheme,
&outside_info, &data_out, &sessions_data_out_);
assert(rc == TPM2_RC_SUCCESS);
return std::vector<uint8_t>(data_out.buffer, data_out.buffer + data_out.size);
}
int App::EvictControl(uint32_t auth, uint32_t key_handle,
uint32_t persistent_handle) {
LOG1("EvictControl %x %x\n", key_handle, persistent_handle);
return Tss2_Sys_EvictControl(tss_.GetSysContext(), auth, key_handle,
&sessions_data_, persistent_handle,
&sessions_data_out_);
}
int App::NvDefineSpace(uint32_t nv_index, size_t data_size) {
LOG1("NvDefineSpace %x %x\n", nv_index, data_size);
TPM2B_AUTH auth = {};
TPM2B_NV_PUBLIC public_info = {};
public_info.size = sizeof(TPMS_NV_PUBLIC);
public_info.nvPublic.nvIndex = nv_index;
public_info.nvPublic.nameAlg = TPM2_ALG_SHA256;
public_info.nvPublic.attributes = BuildNvSpaceAttributes();
public_info.nvPublic.authPolicy.size = 0;
public_info.nvPublic.dataSize = data_size;
return Tss2_Sys_NV_DefineSpace(tss_.GetSysContext(),
/*authHandle=*/TPM2_RH_PLATFORM,
&sessions_data_, &auth, &public_info,
&sessions_data_out_);
}
int App::NvWrite(uint32_t nv_index, const std::vector<uint8_t> &data) {
LOG1("NvWrite %x %x\n", nv_index, data.size());
TPM2B_MAX_NV_BUFFER buffer = {};
assert(data.size() <= TPM2_MAX_NV_BUFFER_SIZE);
buffer.size = data.size();
memcpy(buffer.buffer, data.data(), data.size());
return Tss2_Sys_NV_Write(tss_.GetSysContext(),
/*authHandle=*/TPM2_RH_PLATFORM, nv_index,
&sessions_data_, &buffer,
/*offset=*/0, &sessions_data_out_);
}
NvReadPublicResult App::NvReadPublic(uint32_t nv_index) {
LOG1("NvReadPublic %x\n", nv_index);
TPM2B_NV_PUBLIC public_info = {};
TPM2B_NAME name = {
.size = TPM2BStructSize<TPM2B_NAME>(),
};
NvReadPublicResult result;
result.rc = Tss2_Sys_NV_ReadPublic(tss_.GetSysContext(), nv_index,
/*cmdAuthsArray=*/nullptr, &public_info,
&name, /*rspAuthsArray=*/nullptr);
if (result.rc == TPM2_RC_SUCCESS) {
result.data_size = public_info.nvPublic.dataSize;
}
return result;
}
NvReadResult App::NvRead(uint32_t nv_index, int size, int offset) {
LOG1("NvRead %x %d %d\n", nv_index, size, offset);
TPM2B_MAX_NV_BUFFER buffer = {
.size = TPM2BStructSize<TPM2B_MAX_NV_BUFFER>(),
};
NvReadResult result;
result.rc = Tss2_Sys_NV_Read(tss_.GetSysContext(), TPM2_RH_PLATFORM, nv_index,
&sessions_data_, size, offset, &buffer,
&sessions_data_out_);
if (result.rc == TPM2_RC_SUCCESS) {
result.data =
std::vector<uint8_t>(buffer.buffer, buffer.buffer + buffer.size);
}
return result;
}
QuoteResult App::Quote(uint32_t key_handle, const std::string &nonce) {
LOG1("Quote %x '%s'\n", key_handle, nonce.c_str());
TPM2B_DATA qualifying_data = {};
assert(nonce.size() < sizeof(qualifying_data.buffer));
qualifying_data.size = nonce.size();
memcpy(qualifying_data.buffer, nonce.data(), nonce.size());
TPMT_SIG_SCHEME scheme = {};
scheme.scheme = TPM2_ALG_NULL; // Use the key's signing scheme.
TPML_PCR_SELECTION pcr_selection = {};
pcr_selection.count = 1;
pcr_selection.pcrSelections[0].hash = TPM2_ALG_SHA256;
pcr_selection.pcrSelections[0].sizeofSelect = 3;
// Clear out PCR select bit field.
pcr_selection.pcrSelections[0].pcrSelect[0] = 0;
pcr_selection.pcrSelections[0].pcrSelect[1] = 0;
pcr_selection.pcrSelections[0].pcrSelect[2] = 0;
// Set the first four PCRs.
pcr_selection.pcrSelections[0].pcrSelect[(0 / 8)] |= (1 << (0 % 8));
pcr_selection.pcrSelections[0].pcrSelect[(1 / 8)] |= (1 << (1 % 8));
pcr_selection.pcrSelections[0].pcrSelect[(2 / 8)] |= (1 << (2 % 8));
pcr_selection.pcrSelections[0].pcrSelect[(3 / 8)] |= (1 << (3 % 8));
TPM2B_ATTEST quoted = {
.size = TPM2BStructSize<TPM2B_ATTEST>(),
};
TPMT_SIGNATURE signature = {};
QuoteResult result;
result.rc = Tss2_Sys_Quote(tss_.GetSysContext(), key_handle, &sessions_data_,
&qualifying_data, &scheme, &pcr_selection, "ed,
&signature, &sessions_data_out_);
if (result.rc == TPM2_RC_SUCCESS) {
result.sign_algo = signature.sigAlg;
if (signature.sigAlg == TPM2_ALG_RSASSA) {
result.hash_algo = signature.signature.rsassa.hash;
result.rsa_ssa_sig =
std::vector<uint8_t>(signature.signature.rsassa.sig.buffer,
signature.signature.rsassa.sig.buffer +
signature.signature.rsassa.sig.size);
}
result.tpm2b_attest = std::vector<uint8_t>(
quoted.attestationData, quoted.attestationData + quoted.size);
}
return result;
}
int App::HierarchyChangeAuth(int hierarchy, const std::string &auth_string) {
LOG1("HierarchyChangeAuth %x '%s'\n", hierarchy, auth_string.c_str());
TPM2B_AUTH auth = {};