55 lines
2.4 KiB
C++
55 lines
2.4 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include <trusty_keymaster/TrustySharedSecret.h>
|
|
|
|
#include <aidl/android/hardware/security/keymint/ErrorCode.h>
|
|
#include <keymaster/android_keymaster.h>
|
|
#include "KeyMintUtils.h"
|
|
|
|
namespace aidl::android::hardware::security::sharedsecret::trusty {
|
|
|
|
using keymint::km_utils::kmBlob2vector;
|
|
using keymint::km_utils::kmError2ScopedAStatus;
|
|
|
|
::ndk::ScopedAStatus TrustySharedSecret::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);
|
|
}
|
|
|
|
::ndk::ScopedAStatus TrustySharedSecret::computeSharedSecret(
|
|
const std::vector<SharedSecretParameters>& params, std::vector<uint8_t>* sharingCheck) {
|
|
keymaster::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::trusty
|