1a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis/* 2a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** 3a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** Copyright 2017, The Android Open Source Project 4a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** 5a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** Licensed under the Apache License, Version 2.0 (the "License"); 6a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** you may not use this file except in compliance with the License. 7a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** You may obtain a copy of the License at 8a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** 9a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** http://www.apache.org/licenses/LICENSE-2.0 10a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** 11a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** Unless required by applicable law or agreed to in writing, software 12a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** distributed under the License is distributed on an "AS IS" BASIS, 13a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** See the License for the specific language governing permissions and 15a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis** limitations under the License. 16a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis*/ 17a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis 18a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis#include "PlatformSpecifics.h" 19a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis 20a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis#include <openssl/hmac.h> 21a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis#include <openssl/sha.h> 22a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis#include <time.h> 23a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis 24a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskisnamespace android { 25a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskisnamespace hardware { 26a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskisnamespace confirmationui { 27a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskisnamespace V1_0 { 28a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskisnamespace implementation { 29a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis 30a0c33ea1ba95f81b0751b51e36f088c28850625dJanis DanisevskisMonotonicClockTimeStamper::TimeStamp MonotonicClockTimeStamper::now() { 31a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis timespec ts; 32a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis if (!clock_gettime(CLOCK_BOOTTIME, &ts)) { 33a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis return TimeStamp(ts.tv_sec * UINT64_C(1000) + ts.tv_nsec / UINT64_C(1000000)); 34a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis } else { 35a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis return {}; 36a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis } 37a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis} 38a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis 39fe584fb317bc7e22d88c97629679a875ee5d9433Janis Danisevskissupport::NullOr<support::hmac_t> HMacImplementation::hmac256( 40fe584fb317bc7e22d88c97629679a875ee5d9433Janis Danisevskis const support::auth_token_key_t& key, std::initializer_list<support::ByteBufferProxy> buffers) { 41a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis HMAC_CTX hmacCtx; 42a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis HMAC_CTX_init(&hmacCtx); 43fe584fb317bc7e22d88c97629679a875ee5d9433Janis Danisevskis if (!HMAC_Init_ex(&hmacCtx, key.data(), key.size(), EVP_sha256(), nullptr)) { 44a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis return {}; 45a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis } 46a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis for (auto& buffer : buffers) { 47a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis if (!HMAC_Update(&hmacCtx, buffer.data(), buffer.size())) { 48a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis return {}; 49a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis } 50a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis } 51fe584fb317bc7e22d88c97629679a875ee5d9433Janis Danisevskis support::hmac_t result; 52a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis if (!HMAC_Final(&hmacCtx, result.data(), nullptr)) { 53a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis return {}; 54a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis } 55a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis return result; 56a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis} 57a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis 58a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis} // namespace implementation 59a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis} // namespace V1_0 60a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis} // namespace confirmationui 61a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis} // namespace hardware 62a0c33ea1ba95f81b0751b51e36f088c28850625dJanis Danisevskis} // namespace android 63