The implementation of AndroidSecureClock and AndroidSharedSecret to support corresponding ISharedSecret and ISecureClock AIDLs.
Test: atest VtsAidlSharedSecretTargetTest, atest VtsAidlSecureClockTargetTest
Bug: b/175136979, b/175141176
Change-Id: I2a9b0efb54000a3775bf374cc7042752551ea0d9
diff --git a/ng/AndroidSharedSecret.cpp b/ng/AndroidSharedSecret.cpp
new file mode 100644
index 0000000..e06f9b5
--- /dev/null
+++ b/ng/AndroidSharedSecret.cpp
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2020, 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.
+ */
+
+#define LOG_TAG "android.hardware.security.sharedsecret-impl"
+#include <log/log.h>
+
+#include "AndroidSharedSecret.h"
+#include "KeyMintUtils.h"
+#include <aidl/android/hardware/security/keymint/ErrorCode.h>
+#include <keymaster/android_keymaster.h>
+
+namespace aidl::android::hardware::security::sharedsecret {
+
+using namespace ::keymaster;
+using namespace ::aidl::android::hardware::security::keymint::km_utils;
+
+AndroidSharedSecret::AndroidSharedSecret(std::shared_ptr<keymint::AndroidKeyMintDevice> keymint)
+ : impl_(keymint->getKeymasterImpl()) {}
+
+AndroidSharedSecret::~AndroidSharedSecret() {}
+
+ScopedAStatus AndroidSharedSecret::getSharedSecretParameters(SharedSecretParameters* params) {
+ auto response = impl_->GetHmacSharingParameters();
+ params->seed = kmBlob2vector(response.params.seed);
+ params->nonce = {std::begin(response.params.nonce), std::end(response.params.nonce)};
+ return kmError2ScopedAStatus(response.error);
+}
+
+ScopedAStatus AndroidSharedSecret::computeSharedSecret(const vector<SharedSecretParameters>& params,
+ vector<uint8_t>* sharingCheck) {
+ ComputeSharedHmacRequest request(impl_->message_version());
+ request.params_array.params_array = new keymaster::HmacSharingParameters[params.size()];
+ request.params_array.num_params = params.size();
+ for (size_t i = 0; i < params.size(); ++i) {
+ request.params_array.params_array[i].seed = {params[i].seed.data(), params[i].seed.size()};
+ if (sizeof(request.params_array.params_array[i].nonce) != params[i].nonce.size()) {
+ return kmError2ScopedAStatus(KM_ERROR_INVALID_ARGUMENT);
+ }
+ memcpy(request.params_array.params_array[i].nonce, params[i].nonce.data(),
+ params[i].nonce.size());
+ }
+ auto response = impl_->ComputeSharedHmac(request);
+ if (response.error == KM_ERROR_OK) *sharingCheck = kmBlob2vector(response.sharing_check);
+ return kmError2ScopedAStatus(response.error);
+}
+
+} // namespace aidl::android::hardware::security::sharedsecret