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63 lines
1.8 KiB
63 lines
1.8 KiB
7 months ago
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/*
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**
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** Copyright 2017, 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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#include "PlatformSpecifics.h"
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#include <openssl/hmac.h>
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#include <openssl/sha.h>
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#include <time.h>
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namespace android {
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namespace hardware {
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namespace confirmationui {
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namespace V1_0 {
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namespace implementation {
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MonotonicClockTimeStamper::TimeStamp MonotonicClockTimeStamper::now() {
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timespec ts;
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if (!clock_gettime(CLOCK_BOOTTIME, &ts)) {
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return TimeStamp(ts.tv_sec * UINT64_C(1000) + ts.tv_nsec / UINT64_C(1000000));
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} else {
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return {};
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}
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}
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support::NullOr<support::hmac_t> HMacImplementation::hmac256(
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const support::auth_token_key_t& key, std::initializer_list<support::ByteBufferProxy> buffers) {
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HMAC_CTX hmacCtx;
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HMAC_CTX_init(&hmacCtx);
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if (!HMAC_Init_ex(&hmacCtx, key.data(), key.size(), EVP_sha256(), nullptr)) {
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return {};
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}
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for (auto& buffer : buffers) {
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if (!HMAC_Update(&hmacCtx, buffer.data(), buffer.size())) {
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return {};
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}
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}
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support::hmac_t result;
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if (!HMAC_Final(&hmacCtx, result.data(), nullptr)) {
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return {};
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}
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return result;
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}
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} // namespace implementation
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} // namespace V1_0
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} // namespace confirmationui
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} // namespace hardware
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} // namespace android
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