127 lines
5.7 KiB
C++
127 lines
5.7 KiB
C++
/*
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* Copyright 2019, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "IdentityCredentialStore"
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#include <android-base/logging.h>
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#include <android/binder_manager.h>
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#include "IdentityCredential.h"
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#include "IdentityCredentialStore.h"
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#include "PresentationSession.h"
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#include "WritableIdentityCredential.h"
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namespace aidl::android::hardware::identity {
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using ::aidl::android::hardware::security::keymint::IRemotelyProvisionedComponent;
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IdentityCredentialStore::IdentityCredentialStore(sp<SecureHardwareProxyFactory> hwProxyFactory,
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optional<string> remotelyProvisionedComponent)
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: hwProxyFactory_(hwProxyFactory),
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remotelyProvisionedComponentName_(remotelyProvisionedComponent) {
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hardwareInformation_.credentialStoreName = "Identity Credential Reference Implementation";
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hardwareInformation_.credentialStoreAuthorName = "Google";
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hardwareInformation_.dataChunkSize = kGcmChunkSize;
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hardwareInformation_.isDirectAccess = false;
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hardwareInformation_.supportedDocTypes = {};
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hardwareInformation_.isRemoteKeyProvisioningSupported =
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remotelyProvisionedComponentName_.has_value();
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}
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ndk::ScopedAStatus IdentityCredentialStore::getHardwareInformation(
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HardwareInformation* hardwareInformation) {
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*hardwareInformation = hardwareInformation_;
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return ndk::ScopedAStatus::ok();
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}
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ndk::ScopedAStatus IdentityCredentialStore::createCredential(
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const string& docType, bool testCredential,
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shared_ptr<IWritableIdentityCredential>* outWritableCredential) {
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sp<SecureHardwareProvisioningProxy> hwProxy = hwProxyFactory_->createProvisioningProxy();
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shared_ptr<WritableIdentityCredential> wc =
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ndk::SharedRefBase::make<WritableIdentityCredential>(hwProxy, docType, testCredential,
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hardwareInformation_);
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if (!wc->initialize()) {
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return ndk::ScopedAStatus(AStatus_fromServiceSpecificErrorWithMessage(
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IIdentityCredentialStore::STATUS_FAILED,
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"Error initializing WritableIdentityCredential"));
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}
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*outWritableCredential = wc;
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return ndk::ScopedAStatus::ok();
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}
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ndk::ScopedAStatus IdentityCredentialStore::getCredential(
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CipherSuite cipherSuite, const vector<uint8_t>& credentialData,
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shared_ptr<IIdentityCredential>* outCredential) {
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// We only support CIPHERSUITE_ECDHE_HKDF_ECDSA_WITH_AES_256_GCM_SHA256 right now.
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if (cipherSuite != CipherSuite::CIPHERSUITE_ECDHE_HKDF_ECDSA_WITH_AES_256_GCM_SHA256) {
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return ndk::ScopedAStatus(AStatus_fromServiceSpecificErrorWithMessage(
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IIdentityCredentialStore::STATUS_CIPHER_SUITE_NOT_SUPPORTED,
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"Unsupported cipher suite"));
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}
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shared_ptr<IdentityCredential> credential = ndk::SharedRefBase::make<IdentityCredential>(
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hwProxyFactory_, credentialData, nullptr /* session */, hardwareInformation_);
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auto ret = credential->initialize();
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if (ret != IIdentityCredentialStore::STATUS_OK) {
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return ndk::ScopedAStatus(AStatus_fromServiceSpecificErrorWithMessage(
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int(ret), "Error initializing IdentityCredential"));
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}
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*outCredential = credential;
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return ndk::ScopedAStatus::ok();
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}
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ndk::ScopedAStatus IdentityCredentialStore::createPresentationSession(
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CipherSuite cipherSuite, shared_ptr<IPresentationSession>* outSession) {
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// We only support CIPHERSUITE_ECDHE_HKDF_ECDSA_WITH_AES_256_GCM_SHA256 right now.
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if (cipherSuite != CipherSuite::CIPHERSUITE_ECDHE_HKDF_ECDSA_WITH_AES_256_GCM_SHA256) {
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return ndk::ScopedAStatus(AStatus_fromServiceSpecificErrorWithMessage(
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IIdentityCredentialStore::STATUS_CIPHER_SUITE_NOT_SUPPORTED,
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"Unsupported cipher suite"));
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}
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sp<SecureHardwareSessionProxy> hwProxy = hwProxyFactory_->createSessionProxy();
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shared_ptr<PresentationSession> session = ndk::SharedRefBase::make<PresentationSession>(
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hwProxyFactory_, hwProxy, hardwareInformation_);
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auto ret = session->initialize();
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if (ret != IIdentityCredentialStore::STATUS_OK) {
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return ndk::ScopedAStatus(AStatus_fromServiceSpecificErrorWithMessage(
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int(ret), "Error initializing PresentationSession"));
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}
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*outSession = session;
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return ndk::ScopedAStatus::ok();
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}
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ndk::ScopedAStatus IdentityCredentialStore::getRemotelyProvisionedComponent(
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shared_ptr<IRemotelyProvisionedComponent>* outRemotelyProvisionedComponent) {
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if (!remotelyProvisionedComponentName_) {
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return ndk::ScopedAStatus(AStatus_fromExceptionCodeWithMessage(
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EX_UNSUPPORTED_OPERATION, "Remote key provisioning is not supported"));
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}
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ndk::SpAIBinder binder(
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AServiceManager_waitForService(remotelyProvisionedComponentName_->c_str()));
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if (binder.get() == nullptr) {
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return ndk::ScopedAStatus(AStatus_fromServiceSpecificErrorWithMessage(
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IIdentityCredentialStore::STATUS_FAILED,
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"Unable to get remotely provisioned component"));
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}
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*outRemotelyProvisionedComponent = IRemotelyProvisionedComponent::fromBinder(binder);
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return ndk::ScopedAStatus::ok();
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}
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} // namespace aidl::android::hardware::identity
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