1 /*
2 * Copyright (c) 2024-2024 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 #include "file_data_source.h"
16 #include "signature_tools_log.h"
17
18 namespace OHOS {
19 namespace SignatureTools {
FileDataSource(RandomAccessFile & hapFile,int64_t offset,int64_t size,int64_t position)20 FileDataSource::FileDataSource(RandomAccessFile& hapFile,
21 int64_t offset, int64_t size, int64_t position)
22 : DataSource(), hapFileRandomAccess(hapFile), fileOffset(offset), sourceSize(size), sourcePosition(position)
23 {
24 }
25
~FileDataSource()26 FileDataSource::~FileDataSource()
27 {
28 }
29
HasRemaining() const30 bool FileDataSource::HasRemaining() const
31 {
32 return sourcePosition < sourceSize;
33 }
34
Remaining() const35 int64_t FileDataSource::Remaining() const
36 {
37 return sourceSize - sourcePosition;
38 }
39
Reset()40 void FileDataSource::Reset()
41 {
42 sourcePosition = 0;
43 }
44
ReadDataAndDigestUpdate(const DigestParameter & digestParam,int32_t chunkSize)45 bool FileDataSource::ReadDataAndDigestUpdate(const DigestParameter& digestParam, int32_t chunkSize)
46 {
47 if (!hapFileRandomAccess.ReadFileFromOffsetAndDigestUpdate(digestParam, chunkSize,
48 fileOffset + sourcePosition)) {
49 SIGNATURE_TOOLS_LOGE("ReadFileFromOffsetAndDigestUpdate failed");
50 return false;
51 }
52 sourcePosition += chunkSize;
53 return true;
54 }
55 } // namespace SignatureTools
56 } // namespace OHOS