1 /*
2 * Copyright (C) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "common/hap_file_data_source.h"
17
18 #include "common/hap_verify_log.h"
19
20 namespace OHOS {
21 namespace Security {
22 namespace Verify {
HapFileDataSource(RandomAccessFile & hapFile,long long offset,long long size,long long position)23 HapFileDataSource::HapFileDataSource(RandomAccessFile& hapFile,
24 long long offset, long long size, long long position)
25 : DataSource(), hapFileRandomAccess(hapFile), fileOffset(offset), sourceSize(size), sourcePosition(position)
26 {
27 }
28
~HapFileDataSource()29 HapFileDataSource::~HapFileDataSource()
30 {
31 }
32
HasRemaining() const33 bool HapFileDataSource::HasRemaining() const
34 {
35 return sourcePosition < sourceSize;
36 }
37
Remaining() const38 long long HapFileDataSource::Remaining() const
39 {
40 return sourceSize - sourcePosition;
41 }
42
Reset()43 void HapFileDataSource::Reset()
44 {
45 sourcePosition = 0;
46 }
47
ReadDataAndDigestUpdate(const DigestParameter & digestParam,int32_t chunkSize)48 bool HapFileDataSource::ReadDataAndDigestUpdate(const DigestParameter& digestParam, int32_t chunkSize)
49 {
50 if (!hapFileRandomAccess.ReadFileFromOffsetAndDigestUpdate(digestParam, chunkSize, fileOffset + sourcePosition)) {
51 HAPVERIFY_LOG_ERROR("ReadFileFromOffsetAndDigestUpdate failed");
52 return false;
53 }
54 sourcePosition += chunkSize;
55 return true;
56 }
57 } // namespace Verify
58 } // namespace Security
59 } // namespace OHOS
60