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 
16 #ifndef SIGNATRUETOOLS_ZIP_SIGNER_H
17 #define SIGNATRUETOOLS_ZIP_SIGNER_H
18 
19 #include <fstream>
20 #include <optional>
21 #include <string>
22 #include <vector>
23 
24 #include "endof_central_directory.h"
25 #include "signature_tools_log.h"
26 #include "zip_entry.h"
27 
28 namespace OHOS {
29 namespace SignatureTools {
30 class ZipSigner {
31 public:
32     /* file is uncompress file flag */
33     static constexpr int FILE_UNCOMPRESS_METHOD_FLAG = 0;
34 
35     /* max comment length */
36     static constexpr int MAX_COMMENT_LENGTH = 65535;
37 
ZipSigner()38     ZipSigner()
39     {
40         m_endOfCentralDirectory = nullptr;
41     }
42 
~ZipSigner()43     ~ZipSigner()
44     {
45         delete m_endOfCentralDirectory;
46         for (auto& zipEntry : m_zipEntries) {
47             delete zipEntry;
48         }
49     }
50 
51     bool Init(std::ifstream& inputFile);
52 
53     /**
54      * output zip to zip file
55      *
56      * @param outFile file path
57      */
58     bool ToFile(std::ifstream& input, std::ofstream& output);
59 
60     /**
61      * alignment uncompress entry
62      *
63      * @param alignment int alignment
64      */
65     void Alignment(int alignment);
66 
67     void RemoveSignBlock();
68 
69     std::vector<ZipEntry*>& GetZipEntries();
70 
71     void SetZipEntries(const std::vector<ZipEntry*>& zipEntries);
72 
73     uint32_t GetSigningOffset();
74 
75     void SetSigningOffset(uint32_t signingOffset);
76 
77     std::string GetSigningBlock();
78 
79     void SetSigningBlock(const std::string& signingBlock);
80 
81     uint32_t GetCDOffset();
82 
83     void SetCDOffset(uint32_t cDOffset);
84 
85     uint32_t GetEOCDOffset();
86 
87     void SetEOCDOffset(uint32_t eOCDOffset);
88 
89     EndOfCentralDirectory* GetEndOfCentralDirectory();
90 
91     void SetEndOfCentralDirectory(EndOfCentralDirectory* endOfCentralDirectory);
92 
93 private:
94     EndOfCentralDirectory* GetZipEndOfCentralDirectory(std::ifstream& input);
95 
96     bool GetZipCentralDirectory(std::ifstream& input);
97 
98     std::string GetSigningBlock(std::ifstream& input);
99 
100     bool GetZipEntries(std::ifstream& input);
101 
102     /* sort uncompress entry in the front. */
103     void Sort();
104 
105     void ResetOffset();
106 
107     std::vector<ZipEntry*> m_zipEntries;
108 
109     uint32_t m_signingOffset = 0;
110 
111     std::string m_signingBlock;
112 
113     uint32_t m_cDOffset = 0;
114 
115     uint32_t m_eOCDOffset = 0;
116 
117     EndOfCentralDirectory* m_endOfCentralDirectory;
118 };
119 } // namespace SignatureTools
120 } // namespace OHOS
121 #endif // SIGNATRUETOOLS_ZIP_SIGNER_H
122