mirror of
https://github.com/Tencent/MMKV.git
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guoling
66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
/*
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* Tencent is pleased to support the open source community by making
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* MMKV available.
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*
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* Copyright (C) 2020 THL A29 Limited, a Tencent company.
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* All rights reserved.
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*
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* Licensed under the BSD 3-Clause License (the "License"); you may not use
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* this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* https://opensource.org/licenses/BSD-3-Clause
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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 "CodedInputDataCrypt.h"
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#if defined(MMKV_APPLE) && !defined(MMKV_DISABLE_CRYPT)
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# include "PBUtility.h"
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# include <stdexcept>
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# if __has_feature(objc_arc)
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# error This file must be compiled with MRC. Use -fno-objc-arc flag.
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# endif
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using namespace std;
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namespace mmkv {
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NSString *CodedInputDataCrypt::readNSString(KeyValueHolderCrypt &kvHolder) {
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kvHolder.offset = static_cast<uint32_t>(m_position);
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int32_t size = this->readRawVarint32(true);
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if (size < 0) {
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throw length_error("InvalidProtocolBuffer negativeSize");
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}
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auto s_size = static_cast<size_t>(size);
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if (s_size <= m_size - m_position) {
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if (s_size > mmkv::KeySizeLimit) {
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throw length_error("MMKV key too large for uint16 holder");
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}
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consumeBytes(s_size);
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kvHolder.keySize = static_cast<uint16_t>(s_size);
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auto ptr = m_decryptBuffer + m_decryptBufferPosition;
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NSString *result = [[NSString alloc] initWithBytes:ptr length:s_size encoding:NSUTF8StringEncoding];
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m_position += s_size;
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m_decryptBufferPosition += s_size;
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return [result autorelease];
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} else {
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throw out_of_range("InvalidProtocolBuffer truncatedMessage");
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}
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}
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} // namespace mmkv
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#endif // MMKV_APPLE && !MMKV_DISABLE_CRYPT
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