69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
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/*
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* Copyright 2020, 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 "android.hardware.security.sharedsecret-impl"
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#include <log/log.h>
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#include "guest/hals/keymint/remote/remote_shared_secret.h"
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#include <aidl/android/hardware/security/keymint/ErrorCode.h>
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#include <keymaster/android_keymaster.h>
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#include "KeyMintUtils.h"
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namespace aidl::android::hardware::security::sharedsecret {
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using namespace ::keymaster;
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using namespace ::aidl::android::hardware::security::keymint::km_utils;
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RemoteSharedSecret::RemoteSharedSecret(::keymaster::RemoteKeymaster& keymint)
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: impl_(keymint) {}
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RemoteSharedSecret::~RemoteSharedSecret() {}
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ScopedAStatus RemoteSharedSecret::getSharedSecretParameters(
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SharedSecretParameters* params) {
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auto response = impl_.GetHmacSharingParameters();
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params->seed = kmBlob2vector(response.params.seed);
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params->nonce = {std::begin(response.params.nonce),
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std::end(response.params.nonce)};
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return kmError2ScopedAStatus(response.error);
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}
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ScopedAStatus RemoteSharedSecret::computeSharedSecret(
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const vector<SharedSecretParameters>& params,
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vector<uint8_t>* sharingCheck) {
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ComputeSharedHmacRequest request(impl_.message_version());
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request.params_array.params_array =
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new keymaster::HmacSharingParameters[params.size()];
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request.params_array.num_params = params.size();
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for (size_t i = 0; i < params.size(); ++i) {
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request.params_array.params_array[i].seed = {params[i].seed.data(),
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params[i].seed.size()};
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if (sizeof(request.params_array.params_array[i].nonce) !=
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params[i].nonce.size()) {
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return kmError2ScopedAStatus(KM_ERROR_INVALID_ARGUMENT);
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}
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memcpy(request.params_array.params_array[i].nonce, params[i].nonce.data(),
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params[i].nonce.size());
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}
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auto response = impl_.ComputeSharedHmac(request);
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if (response.error == KM_ERROR_OK)
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*sharingCheck = kmBlob2vector(response.sharing_check);
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return kmError2ScopedAStatus(response.error);
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}
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} // namespace aidl::android::hardware::security::sharedsecret
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