trusty/keymaster/keymint/TrustyKeyMintDevice.cpp - aosp/platform/system/core - Git at Google

 /*

  * Copyright 2021, The Android Open Source Project
  *
  * 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 <trusty_keymaster/TrustyKeyMintDevice.h>

 #define TAG TrustyKeyMintDevice
 #include <android-base/logging.h>

 #include <keymaster/android_keymaster_messages.h>
 #include <keymaster/authorization_set.h>

 #include <KeyMintUtils.h>

 #include <trusty_keymaster/TrustyKeyMintOperation.h>

 namespace aidl::android::hardware::security::keymint::trusty {

 using keymaster::KeymasterBlob;
 using keymaster::KeymasterKeyBlob;
 using keymaster::TAG_APPLICATION_DATA;
 using keymaster::TAG_APPLICATION_ID;
 using keymaster::TAG_AUTH_TOKEN;
 using km_utils::authToken2AidlVec;
 using km_utils::kmBlob2vector;
 using km_utils::kmError2ScopedAStatus;
 using km_utils::kmParam2Aidl;
 using km_utils::KmParamSet;
 using km_utils::kmParamSet2Aidl;
 using km_utils::legacy_enum_conversion;

 namespace {

 auto kSecurityLevel = SecurityLevel::TRUSTED_ENVIRONMENT;

 KeyCharacteristics convertAuthSet(SecurityLevel securityLevel,
                                   const keymaster::AuthorizationSet& authorizations) {
     KeyCharacteristics retval{securityLevel, {}};
     std::transform(authorizations.begin(), authorizations.end(),
                    std::back_inserter(retval.authorizations), kmParam2Aidl);
     return retval;
 }

 vector<KeyCharacteristics> convertKeyCharacteristics(const keymaster::AuthorizationSet& sw_enforced,
                                                      const keymaster::AuthorizationSet& hw_enforced,
                                                      bool includeKeystoreEnforced = true) {
     KeyCharacteristics keyMintEnforced = convertAuthSet(kSecurityLevel, hw_enforced);
     KeyCharacteristics keystoreEnforced = convertAuthSet(SecurityLevel::KEYSTORE, sw_enforced);

     vector<KeyCharacteristics> retval;
     retval.reserve(2);

     if (!keyMintEnforced.authorizations.empty()) retval.push_back(std::move(keyMintEnforced));
     if (includeKeystoreEnforced && !keystoreEnforced.authorizations.empty()) {
         retval.push_back(std::move(keystoreEnforced));
     }

     return retval;
 }

 Certificate convertCertificate(const keymaster_blob_t& cert) {
     return {std::vector<uint8_t>(cert.data, cert.data + cert.data_length)};
 }

 vector<Certificate> convertCertificateChain(const keymaster::CertificateChain& chain) {
     vector<Certificate> retval;
     std::transform(chain.begin(), chain.end(), std::back_inserter(retval), convertCertificate);
     return retval;
 }

 void addClientAndAppData(const vector<uint8_t>& clientId, const vector<uint8_t>& appData,
                          ::keymaster::AuthorizationSet* params) {
     params->Clear();
     if (clientId.size()) params->push_back(TAG_APPLICATION_ID, clientId.data(), clientId.size());
     if (appData.size()) params->push_back(TAG_APPLICATION_DATA, appData.data(), appData.size());
 }

 }  // namespace

 ScopedAStatus TrustyKeyMintDevice::getHardwareInfo(KeyMintHardwareInfo* info) {
     info->versionNumber = 2;
     info->securityLevel = kSecurityLevel;
     info->keyMintName = "TrustyKeyMintDevice";
     info->keyMintAuthorName = "Google";
     info->timestampTokenRequired = false;
     return ScopedAStatus::ok();
 }

 ScopedAStatus TrustyKeyMintDevice::addRngEntropy(const vector<uint8_t>& data) {
     if (data.size() == 0) return ScopedAStatus::ok();
     if (data.size() > 2048) {
         LOG(DEBUG) << "Too-large entropy update of " << data.size() << " bytes.";
         return kmError2ScopedAStatus(KM_ERROR_INVALID_INPUT_LENGTH);
     }

     keymaster::AddEntropyRequest request(impl_->message_version());
     request.random_data.Reinitialize(data.data(), data.size());

     keymaster::AddEntropyResponse response(impl_->message_version());
     impl_->AddRngEntropy(request, &response);

     return kmError2ScopedAStatus(response.error);
 }

 ScopedAStatus TrustyKeyMintDevice::generateKey(const vector<KeyParameter>& keyParams,
                                                const optional<AttestationKey>& attestationKey,
                                                KeyCreationResult* creationResult) {
     keymaster::GenerateKeyRequest request(impl_->message_version());
     request.key_description.Reinitialize(KmParamSet(keyParams));
     if (attestationKey) {
         request.attestation_signing_key_blob =
                 KeymasterKeyBlob(attestationKey->keyBlob.data(), attestationKey->keyBlob.size());
         request.attest_key_params.Reinitialize(KmParamSet(attestationKey->attestKeyParams));
         request.issuer_subject = KeymasterBlob(attestationKey->issuerSubjectName.data(),
                                                attestationKey->issuerSubjectName.size());
     }

     keymaster::GenerateKeyResponse response(impl_->message_version());
     impl_->GenerateKey(request, &response);

     if (response.error != KM_ERROR_OK) return kmError2ScopedAStatus(response.error);

     creationResult->keyBlob = kmBlob2vector(response.key_blob);
     creationResult->keyCharacteristics =
             convertKeyCharacteristics(response.unenforced, response.enforced);
     creationResult->certificateChain = convertCertificateChain(response.certificate_chain);
     return ScopedAStatus::ok();
 }

 ScopedAStatus TrustyKeyMintDevice::getKeyCharacteristics(
         const vector<uint8_t>& keyBlob,
         const vector<uint8_t>& clientId,  //
         const vector<uint8_t>& appData,   //
         vector<KeyCharacteristics>* characteristics) {
     keymaster::GetKeyCharacteristicsRequest request(impl_->message_version());
     request.SetKeyMaterial(keyBlob.data(), keyBlob.size());
     addClientAndAppData(clientId, appData, &request.additional_params);

     keymaster::GetKeyCharacteristicsResponse response(impl_->message_version());
     impl_->GetKeyCharacteristics(request, &response);

     if (response.error != KM_ERROR_OK) return kmError2ScopedAStatus(response.error);

     *characteristics = convertKeyCharacteristics(response.unenforced, response.enforced,
                                                  false /* includeKeystoreEnforced */);
     return ScopedAStatus::ok();
 }

 ScopedAStatus TrustyKeyMintDevice::importKey(const vector<KeyParameter>& keyParams,
                                              KeyFormat keyFormat, const vector<uint8_t>& keyData,
                                              const optional<AttestationKey>& attestationKey,
                                              KeyCreationResult* creationResult) {
     keymaster::ImportKeyRequest request(impl_->message_version());
     request.key_description.Reinitialize(KmParamSet(keyParams));
     request.key_format = legacy_enum_conversion(keyFormat);
     request.key_data = KeymasterKeyBlob(keyData.data(), keyData.size());
     if (attestationKey) {
         request.attestation_signing_key_blob =
                 KeymasterKeyBlob(attestationKey->keyBlob.data(), attestationKey->keyBlob.size());
         request.attest_key_params.Reinitialize(KmParamSet(attestationKey->attestKeyParams));
         request.issuer_subject = KeymasterBlob(attestationKey->issuerSubjectName.data(),
                                                attestationKey->issuerSubjectName.size());
     }

     keymaster::ImportKeyResponse response(impl_->message_version());
     impl_->ImportKey(request, &response);

     if (response.error != KM_ERROR_OK) {
         return kmError2ScopedAStatus(response.error);
     }

     creationResult->keyBlob = kmBlob2vector(response.key_blob);
     creationResult->keyCharacteristics =
             convertKeyCharacteristics(response.unenforced, response.enforced);
     creationResult->certificateChain = convertCertificateChain(response.certificate_chain);

     return ScopedAStatus::ok();
 }

 ScopedAStatus TrustyKeyMintDevice::importWrappedKey(const vector<uint8_t>& wrappedKeyData,
                                                     const vector<uint8_t>& wrappingKeyBlob,  //
                                                     const vector<uint8_t>& maskingKey,
                                                     const vector<KeyParameter>& unwrappingParams,
                                                     int64_t passwordSid,  //
                                                     int64_t biometricSid,
                                                     KeyCreationResult* creationResult) {
     keymaster::ImportWrappedKeyRequest request(impl_->message_version());
     request.SetWrappedMaterial(wrappedKeyData.data(), wrappedKeyData.size());
     request.SetWrappingMaterial(wrappingKeyBlob.data(), wrappingKeyBlob.size());
     request.SetMaskingKeyMaterial(maskingKey.data(), maskingKey.size());
     request.additional_params.Reinitialize(KmParamSet(unwrappingParams));
     request.password_sid = static_cast<uint64_t>(passwordSid);
     request.biometric_sid = static_cast<uint64_t>(biometricSid);

     keymaster::ImportWrappedKeyResponse response(impl_->message_version());
     impl_->ImportWrappedKey(request, &response);

     if (response.error != KM_ERROR_OK) {
         return kmError2ScopedAStatus(response.error);
     }

     creationResult->keyBlob = kmBlob2vector(response.key_blob);
     creationResult->keyCharacteristics =
             convertKeyCharacteristics(response.unenforced, response.enforced);
     creationResult->certificateChain = convertCertificateChain(response.certificate_chain);

     return ScopedAStatus::ok();
 }

 ScopedAStatus TrustyKeyMintDevice::upgradeKey(const vector<uint8_t>& keyBlobToUpgrade,
                                               const vector<KeyParameter>& upgradeParams,
                                               vector<uint8_t>* keyBlob) {
     keymaster::UpgradeKeyRequest request(impl_->message_version());
     request.SetKeyMaterial(keyBlobToUpgrade.data(), keyBlobToUpgrade.size());
     request.upgrade_params.Reinitialize(KmParamSet(upgradeParams));

     keymaster::UpgradeKeyResponse response(impl_->message_version());
     impl_->UpgradeKey(request, &response);

     if (response.error != KM_ERROR_OK) {
         return kmError2ScopedAStatus(response.error);
     }

     *keyBlob = kmBlob2vector(response.upgraded_key);
     return ScopedAStatus::ok();
 }

 ScopedAStatus TrustyKeyMintDevice::deleteKey(const vector<uint8_t>& keyBlob) {
     keymaster::DeleteKeyRequest request(impl_->message_version());
     request.SetKeyMaterial(keyBlob.data(), keyBlob.size());

     keymaster::DeleteKeyResponse response(impl_->message_version());
     impl_->DeleteKey(request, &response);

     return kmError2ScopedAStatus(response.error);
 }

 ScopedAStatus TrustyKeyMintDevice::deleteAllKeys() {
     // There's nothing to be done to delete software key blobs.
     keymaster::DeleteAllKeysRequest request(impl_->message_version());
     keymaster::DeleteAllKeysResponse response(impl_->message_version());
     impl_->DeleteAllKeys(request, &response);

     return kmError2ScopedAStatus(response.error);
 }

 ScopedAStatus TrustyKeyMintDevice::destroyAttestationIds() {
     return kmError2ScopedAStatus(KM_ERROR_UNIMPLEMENTED);
 }

 ScopedAStatus TrustyKeyMintDevice::begin(KeyPurpose purpose, const vector<uint8_t>& keyBlob,
                                          const vector<KeyParameter>& params,
                                          const optional<HardwareAuthToken>& authToken,
                                          BeginResult* result) {
     keymaster::BeginOperationRequest request(impl_->message_version());
     request.purpose = legacy_enum_conversion(purpose);
     request.SetKeyMaterial(keyBlob.data(), keyBlob.size());
     request.additional_params.Reinitialize(KmParamSet(params));

     vector<uint8_t> vector_token = authToken2AidlVec(authToken);
     request.additional_params.push_back(
             TAG_AUTH_TOKEN, reinterpret_cast<uint8_t*>(vector_token.data()), vector_token.size());

     keymaster::BeginOperationResponse response(impl_->message_version());
     impl_->BeginOperation(request, &response);

     if (response.error != KM_ERROR_OK) {
         return kmError2ScopedAStatus(response.error);
     }

     result->params = kmParamSet2Aidl(response.output_params);
     result->challenge = response.op_handle;
     result->operation = ndk::SharedRefBase::make<TrustyKeyMintOperation>(impl_, response.op_handle);
     return ScopedAStatus::ok();
 }

 ScopedAStatus TrustyKeyMintDevice::deviceLocked(
         bool passwordOnly, const std::optional<secureclock::TimeStampToken>& timestampToken) {
     keymaster::DeviceLockedRequest request(impl_->message_version());
     request.passwordOnly = passwordOnly;
     if (timestampToken.has_value()) {
         request.token.challenge = timestampToken->challenge;
         request.token.mac = {timestampToken->mac.data(), timestampToken->mac.size()};
         request.token.timestamp = timestampToken->timestamp.milliSeconds;
     }
     keymaster::DeviceLockedResponse response = impl_->DeviceLocked(request);
     return kmError2ScopedAStatus(response.error);
 }

 ScopedAStatus TrustyKeyMintDevice::earlyBootEnded() {
     keymaster::EarlyBootEndedResponse response = impl_->EarlyBootEnded();
     return kmError2ScopedAStatus(response.error);
 }

 ScopedAStatus TrustyKeyMintDevice::convertStorageKeyToEphemeral(
         const vector<uint8_t>& storageKeyBlob, vector<uint8_t>* ephemeralKeyBlob) {
     keymaster::ExportKeyRequest request(impl_->message_version());
     request.SetKeyMaterial(storageKeyBlob.data(), storageKeyBlob.size());
     request.key_format = KM_KEY_FORMAT_RAW;

     keymaster::ExportKeyResponse response(impl_->message_version());
     impl_->ExportKey(request, &response);

     if (response.error != KM_ERROR_OK) return kmError2ScopedAStatus(response.error);
     if (response.key_data) {
         *ephemeralKeyBlob = {response.key_data, response.key_data + response.key_data_length};
     }
     return ScopedAStatus::ok();
 }

 ScopedAStatus TrustyKeyMintDevice::getRootOfTrustChallenge(array<uint8_t, 16>* /* challenge */) {
     return kmError2ScopedAStatus(KM_ERROR_UNIMPLEMENTED);
 }

 ScopedAStatus TrustyKeyMintDevice::getRootOfTrust(const array<uint8_t, 16>& /* challenge */,
                                                   vector<uint8_t>* /* rootOfTrust */) {
     return kmError2ScopedAStatus(KM_ERROR_UNIMPLEMENTED);
 }

 ScopedAStatus TrustyKeyMintDevice::sendRootOfTrust(const vector<uint8_t>& /* rootOfTrust */) {
     return kmError2ScopedAStatus(KM_ERROR_UNIMPLEMENTED);
 }

 }  // namespace aidl::android::hardware::security::keymint::trusty
	/*

	* Copyright 2021, The Android Open Source Project
	*
	* 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 <trusty_keymaster/TrustyKeyMintDevice.h>

	#define TAG TrustyKeyMintDevice
	#include <android-base/logging.h>

	#include <keymaster/android_keymaster_messages.h>
	#include <keymaster/authorization_set.h>

	#include <KeyMintUtils.h>

	#include <trusty_keymaster/TrustyKeyMintOperation.h>

	namespace aidl::android::hardware::security::keymint::trusty {

	using keymaster::KeymasterBlob;
	using keymaster::KeymasterKeyBlob;
	using keymaster::TAG_APPLICATION_DATA;
	using keymaster::TAG_APPLICATION_ID;
	using keymaster::TAG_AUTH_TOKEN;
	using km_utils::authToken2AidlVec;
	using km_utils::kmBlob2vector;
	using km_utils::kmError2ScopedAStatus;
	using km_utils::kmParam2Aidl;
	using km_utils::KmParamSet;
	using km_utils::kmParamSet2Aidl;
	using km_utils::legacy_enum_conversion;

	namespace {

	auto kSecurityLevel = SecurityLevel::TRUSTED_ENVIRONMENT;

	KeyCharacteristics convertAuthSet(SecurityLevel securityLevel,
	const keymaster::AuthorizationSet& authorizations) {
	KeyCharacteristics retval{securityLevel, {}};
	std::transform(authorizations.begin(), authorizations.end(),
	std::back_inserter(retval.authorizations), kmParam2Aidl);
	return retval;
	}

	vector<KeyCharacteristics> convertKeyCharacteristics(const keymaster::AuthorizationSet& sw_enforced,
	const keymaster::AuthorizationSet& hw_enforced,
	bool includeKeystoreEnforced = true) {
	KeyCharacteristics keyMintEnforced = convertAuthSet(kSecurityLevel, hw_enforced);
	KeyCharacteristics keystoreEnforced = convertAuthSet(SecurityLevel::KEYSTORE, sw_enforced);

	vector<KeyCharacteristics> retval;
	retval.reserve(2);

	if (!keyMintEnforced.authorizations.empty()) retval.push_back(std::move(keyMintEnforced));
	if (includeKeystoreEnforced && !keystoreEnforced.authorizations.empty()) {
	retval.push_back(std::move(keystoreEnforced));
	}

	return retval;
	}

	Certificate convertCertificate(const keymaster_blob_t& cert) {
	return {std::vector<uint8_t>(cert.data, cert.data + cert.data_length)};
	}

	vector<Certificate> convertCertificateChain(const keymaster::CertificateChain& chain) {
	vector<Certificate> retval;
	std::transform(chain.begin(), chain.end(), std::back_inserter(retval), convertCertificate);
	return retval;
	}

	void addClientAndAppData(const vector<uint8_t>& clientId, const vector<uint8_t>& appData,
	::keymaster::AuthorizationSet* params) {
	params->Clear();
	if (clientId.size()) params->push_back(TAG_APPLICATION_ID, clientId.data(), clientId.size());
	if (appData.size()) params->push_back(TAG_APPLICATION_DATA, appData.data(), appData.size());
	}

	} // namespace

	ScopedAStatus TrustyKeyMintDevice::getHardwareInfo(KeyMintHardwareInfo* info) {
	info->versionNumber = 2;
	info->securityLevel = kSecurityLevel;
	info->keyMintName = "TrustyKeyMintDevice";
	info->keyMintAuthorName = "Google";
	info->timestampTokenRequired = false;
	return ScopedAStatus::ok();
	}

	ScopedAStatus TrustyKeyMintDevice::addRngEntropy(const vector<uint8_t>& data) {
	if (data.size() == 0) return ScopedAStatus::ok();
	if (data.size() > 2048) {
	LOG(DEBUG) << "Too-large entropy update of " << data.size() << " bytes.";
	return kmError2ScopedAStatus(KM_ERROR_INVALID_INPUT_LENGTH);
	}

	keymaster::AddEntropyRequest request(impl_->message_version());
	request.random_data.Reinitialize(data.data(), data.size());

	keymaster::AddEntropyResponse response(impl_->message_version());
	impl_->AddRngEntropy(request, &response);

	return kmError2ScopedAStatus(response.error);
	}

	ScopedAStatus TrustyKeyMintDevice::generateKey(const vector<KeyParameter>& keyParams,
	const optional<AttestationKey>& attestationKey,
	KeyCreationResult* creationResult) {
	keymaster::GenerateKeyRequest request(impl_->message_version());
	request.key_description.Reinitialize(KmParamSet(keyParams));
	if (attestationKey) {
	request.attestation_signing_key_blob =
	KeymasterKeyBlob(attestationKey->keyBlob.data(), attestationKey->keyBlob.size());
	request.attest_key_params.Reinitialize(KmParamSet(attestationKey->attestKeyParams));
	request.issuer_subject = KeymasterBlob(attestationKey->issuerSubjectName.data(),
	attestationKey->issuerSubjectName.size());
	}

	keymaster::GenerateKeyResponse response(impl_->message_version());
	impl_->GenerateKey(request, &response);

	if (response.error != KM_ERROR_OK) return kmError2ScopedAStatus(response.error);

	creationResult->keyBlob = kmBlob2vector(response.key_blob);
	creationResult->keyCharacteristics =
	convertKeyCharacteristics(response.unenforced, response.enforced);
	creationResult->certificateChain = convertCertificateChain(response.certificate_chain);
	return ScopedAStatus::ok();
	}

	ScopedAStatus TrustyKeyMintDevice::getKeyCharacteristics(
	const vector<uint8_t>& keyBlob,
	const vector<uint8_t>& clientId, //
	const vector<uint8_t>& appData, //
	vector<KeyCharacteristics>* characteristics) {
	keymaster::GetKeyCharacteristicsRequest request(impl_->message_version());
	request.SetKeyMaterial(keyBlob.data(), keyBlob.size());
	addClientAndAppData(clientId, appData, &request.additional_params);

	keymaster::GetKeyCharacteristicsResponse response(impl_->message_version());
	impl_->GetKeyCharacteristics(request, &response);

	if (response.error != KM_ERROR_OK) return kmError2ScopedAStatus(response.error);

	*characteristics = convertKeyCharacteristics(response.unenforced, response.enforced,
	false /* includeKeystoreEnforced */);
	return ScopedAStatus::ok();
	}

	ScopedAStatus TrustyKeyMintDevice::importKey(const vector<KeyParameter>& keyParams,
	KeyFormat keyFormat, const vector<uint8_t>& keyData,
	const optional<AttestationKey>& attestationKey,
	KeyCreationResult* creationResult) {
	keymaster::ImportKeyRequest request(impl_->message_version());
	request.key_description.Reinitialize(KmParamSet(keyParams));
	request.key_format = legacy_enum_conversion(keyFormat);
	request.key_data = KeymasterKeyBlob(keyData.data(), keyData.size());
	if (attestationKey) {
	request.attestation_signing_key_blob =
	KeymasterKeyBlob(attestationKey->keyBlob.data(), attestationKey->keyBlob.size());
	request.attest_key_params.Reinitialize(KmParamSet(attestationKey->attestKeyParams));
	request.issuer_subject = KeymasterBlob(attestationKey->issuerSubjectName.data(),
	attestationKey->issuerSubjectName.size());
	}

	keymaster::ImportKeyResponse response(impl_->message_version());
	impl_->ImportKey(request, &response);

	if (response.error != KM_ERROR_OK) {
	return kmError2ScopedAStatus(response.error);
	}

	creationResult->keyBlob = kmBlob2vector(response.key_blob);
	creationResult->keyCharacteristics =
	convertKeyCharacteristics(response.unenforced, response.enforced);
	creationResult->certificateChain = convertCertificateChain(response.certificate_chain);

	return ScopedAStatus::ok();
	}

	ScopedAStatus TrustyKeyMintDevice::importWrappedKey(const vector<uint8_t>& wrappedKeyData,
	const vector<uint8_t>& wrappingKeyBlob, //
	const vector<uint8_t>& maskingKey,
	const vector<KeyParameter>& unwrappingParams,
	int64_t passwordSid, //
	int64_t biometricSid,
	KeyCreationResult* creationResult) {
	keymaster::ImportWrappedKeyRequest request(impl_->message_version());
	request.SetWrappedMaterial(wrappedKeyData.data(), wrappedKeyData.size());
	request.SetWrappingMaterial(wrappingKeyBlob.data(), wrappingKeyBlob.size());
	request.SetMaskingKeyMaterial(maskingKey.data(), maskingKey.size());
	request.additional_params.Reinitialize(KmParamSet(unwrappingParams));
	request.password_sid = static_cast<uint64_t>(passwordSid);
	request.biometric_sid = static_cast<uint64_t>(biometricSid);

	keymaster::ImportWrappedKeyResponse response(impl_->message_version());
	impl_->ImportWrappedKey(request, &response);

	if (response.error != KM_ERROR_OK) {
	return kmError2ScopedAStatus(response.error);
	}

	creationResult->keyBlob = kmBlob2vector(response.key_blob);
	creationResult->keyCharacteristics =
	convertKeyCharacteristics(response.unenforced, response.enforced);
	creationResult->certificateChain = convertCertificateChain(response.certificate_chain);

	return ScopedAStatus::ok();
	}

	ScopedAStatus TrustyKeyMintDevice::upgradeKey(const vector<uint8_t>& keyBlobToUpgrade,
	const vector<KeyParameter>& upgradeParams,
	vector<uint8_t>* keyBlob) {
	keymaster::UpgradeKeyRequest request(impl_->message_version());
	request.SetKeyMaterial(keyBlobToUpgrade.data(), keyBlobToUpgrade.size());
	request.upgrade_params.Reinitialize(KmParamSet(upgradeParams));

	keymaster::UpgradeKeyResponse response(impl_->message_version());
	impl_->UpgradeKey(request, &response);

	if (response.error != KM_ERROR_OK) {
	return kmError2ScopedAStatus(response.error);
	}

	*keyBlob = kmBlob2vector(response.upgraded_key);
	return ScopedAStatus::ok();
	}

	ScopedAStatus TrustyKeyMintDevice::deleteKey(const vector<uint8_t>& keyBlob) {
	keymaster::DeleteKeyRequest request(impl_->message_version());
	request.SetKeyMaterial(keyBlob.data(), keyBlob.size());

	keymaster::DeleteKeyResponse response(impl_->message_version());
	impl_->DeleteKey(request, &response);

	return kmError2ScopedAStatus(response.error);
	}

	ScopedAStatus TrustyKeyMintDevice::deleteAllKeys() {
	// There's nothing to be done to delete software key blobs.
	keymaster::DeleteAllKeysRequest request(impl_->message_version());
	keymaster::DeleteAllKeysResponse response(impl_->message_version());
	impl_->DeleteAllKeys(request, &response);

	return kmError2ScopedAStatus(response.error);
	}

	ScopedAStatus TrustyKeyMintDevice::destroyAttestationIds() {
	return kmError2ScopedAStatus(KM_ERROR_UNIMPLEMENTED);
	}

	ScopedAStatus TrustyKeyMintDevice::begin(KeyPurpose purpose, const vector<uint8_t>& keyBlob,
	const vector<KeyParameter>& params,
	const optional<HardwareAuthToken>& authToken,
	BeginResult* result) {
	keymaster::BeginOperationRequest request(impl_->message_version());
	request.purpose = legacy_enum_conversion(purpose);
	request.SetKeyMaterial(keyBlob.data(), keyBlob.size());
	request.additional_params.Reinitialize(KmParamSet(params));

	vector<uint8_t> vector_token = authToken2AidlVec(authToken);
	request.additional_params.push_back(
	TAG_AUTH_TOKEN, reinterpret_cast<uint8_t*>(vector_token.data()), vector_token.size());

	keymaster::BeginOperationResponse response(impl_->message_version());
	impl_->BeginOperation(request, &response);

	if (response.error != KM_ERROR_OK) {
	return kmError2ScopedAStatus(response.error);
	}

	result->params = kmParamSet2Aidl(response.output_params);
	result->challenge = response.op_handle;
	result->operation = ndk::SharedRefBase::make<TrustyKeyMintOperation>(impl_, response.op_handle);
	return ScopedAStatus::ok();
	}

	ScopedAStatus TrustyKeyMintDevice::deviceLocked(
	bool passwordOnly, const std::optional<secureclock::TimeStampToken>& timestampToken) {
	keymaster::DeviceLockedRequest request(impl_->message_version());
	request.passwordOnly = passwordOnly;
	if (timestampToken.has_value()) {
	request.token.challenge = timestampToken->challenge;
	request.token.mac = {timestampToken->mac.data(), timestampToken->mac.size()};
	request.token.timestamp = timestampToken->timestamp.milliSeconds;
	}
	keymaster::DeviceLockedResponse response = impl_->DeviceLocked(request);
	return kmError2ScopedAStatus(response.error);
	}

	ScopedAStatus TrustyKeyMintDevice::earlyBootEnded() {
	keymaster::EarlyBootEndedResponse response = impl_->EarlyBootEnded();
	return kmError2ScopedAStatus(response.error);
	}

	ScopedAStatus TrustyKeyMintDevice::convertStorageKeyToEphemeral(
	const vector<uint8_t>& storageKeyBlob, vector<uint8_t>* ephemeralKeyBlob) {
	keymaster::ExportKeyRequest request(impl_->message_version());
	request.SetKeyMaterial(storageKeyBlob.data(), storageKeyBlob.size());
	request.key_format = KM_KEY_FORMAT_RAW;

	keymaster::ExportKeyResponse response(impl_->message_version());
	impl_->ExportKey(request, &response);

	if (response.error != KM_ERROR_OK) return kmError2ScopedAStatus(response.error);
	if (response.key_data) {
	*ephemeralKeyBlob = {response.key_data, response.key_data + response.key_data_length};
	}
	return ScopedAStatus::ok();
	}

	ScopedAStatus TrustyKeyMintDevice::getRootOfTrustChallenge(array<uint8_t, 16>* /* challenge */) {
	return kmError2ScopedAStatus(KM_ERROR_UNIMPLEMENTED);
	}

	ScopedAStatus TrustyKeyMintDevice::getRootOfTrust(const array<uint8_t, 16>& /* challenge */,
	vector<uint8_t>* /* rootOfTrust */) {
	return kmError2ScopedAStatus(KM_ERROR_UNIMPLEMENTED);
	}

	ScopedAStatus TrustyKeyMintDevice::sendRootOfTrust(const vector<uint8_t>& /* rootOfTrust */) {
	return kmError2ScopedAStatus(KM_ERROR_UNIMPLEMENTED);
	}

	} // namespace aidl::android::hardware::security::keymint::trusty