You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
2.0 KiB
72 lines
2.0 KiB
/*
|
|
* Copyright (C) 2019 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 "TokenHasher"
|
|
|
|
#include "TokenHasher.h"
|
|
|
|
#include <android-base/logging.h>
|
|
#include <openssl/sha.h>
|
|
|
|
#include "NeuralNetworks.h"
|
|
|
|
namespace android {
|
|
namespace nn {
|
|
|
|
TokenHasher::TokenHasher(const uint8_t* token) : mIsError(token == nullptr) {
|
|
if (mIsError) {
|
|
return;
|
|
}
|
|
if (SHA256_Init(&mHasher) == 0 ||
|
|
SHA256_Update(&mHasher, token, ANEURALNETWORKS_BYTE_SIZE_OF_CACHE_TOKEN) == 0) {
|
|
mIsError = true;
|
|
}
|
|
}
|
|
|
|
bool TokenHasher::update(const void* bytes, size_t length) {
|
|
CHECK(!mIsError) << "Calling update on an token in error state";
|
|
if (SHA256_Update(&mHasher, bytes, length) == 0) {
|
|
mIsError = true;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool TokenHasher::finish() {
|
|
CHECK(!mIsError) << "Calling finish on an token in error state";
|
|
static_assert(SHA256_DIGEST_LENGTH == ANEURALNETWORKS_BYTE_SIZE_OF_CACHE_TOKEN,
|
|
"SHA256_DIGEST_LENGTH != ANEURALNETWORKS_BYTE_SIZE_OF_CACHE_TOKEN");
|
|
mToken.resize(ANEURALNETWORKS_BYTE_SIZE_OF_CACHE_TOKEN);
|
|
if (SHA256_Final(mToken.data(), &mHasher) == 0) {
|
|
mToken.clear();
|
|
mIsError = true;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
const uint8_t* TokenHasher::getCacheToken() const {
|
|
if (mIsError) {
|
|
return nullptr;
|
|
} else {
|
|
CHECK(!mToken.empty());
|
|
return mToken.data();
|
|
}
|
|
}
|
|
|
|
} // namespace nn
|
|
} // namespace android
|