1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <errno.h>
18 #include <stdio.h>
19 #include <stdlib.h>
20
21 #include <algorithm>
22 #include <memory>
23 #include <string>
24 #include <vector>
25
26 #include <ziparchive/zip_archive.h>
27 #include <ziparchive/zip_archive_stream_entry.h>
28 #include <ziparchive/zip_writer.h>
29
usage()30 static void usage() {
31 fprintf(stderr, "usage: bionic_tests_zipalign ALIGNMENT INPUT_ZIP_FILE OUTPUT_ZIP_FILE\n");
32 fprintf(stderr, " ALIGNMENT:\n");
33 fprintf(stderr, " The new alignment of all entries in the new zip file.\n");
34 fprintf(stderr, " INPUT_ZIP_FILE:\n");
35 fprintf(stderr, " The input zip file that will be read but left unmodified.\n");
36 fprintf(stderr, " OUTPUT_ZIP_FILE:\n");
37 fprintf(stderr, " The output zip file that will be created from the input file.\n");
38 }
39
40 using ZipData = std::pair<std::unique_ptr<ZipEntry>, std::unique_ptr<ZipString>>;
41
GetEntries(ZipArchiveHandle handle,std::vector<ZipData> * entries)42 static bool GetEntries(ZipArchiveHandle handle, std::vector<ZipData>* entries) {
43 void* cookie;
44 int32_t return_value = StartIteration(handle, &cookie, nullptr, nullptr);
45 if (return_value != 0) {
46 fprintf(stderr, "Unable to iterate over entries: %s\n", ErrorCodeString(return_value));
47 return false;
48 }
49
50 ZipEntry entry;
51 ZipString name;
52 while ((return_value = Next(cookie, &entry, &name)) == 0) {
53 entries->emplace_back(std::make_pair(std::make_unique<ZipEntry>(entry),
54 std::make_unique<ZipString>(name)));
55 }
56 if (return_value != -1) {
57 fprintf(stderr, "Error while iterating over zip entries: %s\n", ErrorCodeString(return_value));
58 } else {
59 // Sort by offset.
60 std::sort(entries->begin(), entries->end(),
61 [](ZipData& a, ZipData& b) { return a.first->offset < b.first->offset; });
62 }
63
64 EndIteration(cookie);
65 return return_value == -1;
66 }
67
CreateAlignedZip(ZipArchiveHandle & handle,FILE * zip_dst,uint32_t alignment)68 static bool CreateAlignedZip(ZipArchiveHandle& handle, FILE* zip_dst, uint32_t alignment) {
69 std::vector<ZipData> entries;
70 // We will not free the memory created in entries since the program
71 // terminates right after this function is called.
72 if (!GetEntries(handle, &entries)) {
73 return false;
74 }
75
76 ZipWriter writer(zip_dst);
77
78 int32_t error;
79 for (auto& entry : entries) {
80 ZipEntry* zip_entry = entry.first.get();
81 ZipString* zip_str = entry.second.get();
82
83 size_t flags = 0;
84 if ((zip_entry->method & kCompressDeflated) != 0) {
85 flags |= ZipWriter::kCompress;
86 }
87 std::string zip_name(reinterpret_cast<const char*>(zip_str->name), zip_str->name_length);
88 error = writer.StartAlignedEntry(zip_name.c_str(), flags, alignment);
89 if (error != 0) {
90 fprintf(stderr, "StartAlignedEntry failed: %s\n", ZipWriter::ErrorCodeString(error));
91 return false;
92 }
93 std::unique_ptr<ZipArchiveStreamEntry> stream(
94 ZipArchiveStreamEntry::Create(handle, *zip_entry));
95 const std::vector<uint8_t>* data;
96 while ((data = stream->Read()) != nullptr) {
97 error = writer.WriteBytes(data->data(), data->size());
98 if (error != 0) {
99 fprintf(stderr, "WriteBytes failed: %s\n", ZipWriter::ErrorCodeString(error));
100 return false;
101 }
102 }
103 if (!stream->Verify()) {
104 fprintf(stderr, "Failed to verify zip stream writer entry.\n");
105 return false;
106 }
107 error = writer.FinishEntry();
108 if (error != 0) {
109 fprintf(stderr, "FinishEntry failed: %s\n", ZipWriter::ErrorCodeString(error));
110 }
111 }
112
113 error = writer.Finish();
114 if (error != 0) {
115 fprintf(stderr, "Finish failed: %s\n", ZipWriter::ErrorCodeString(error));
116 return false;
117 }
118 return true;
119 }
120
main(int argc,char * argv[])121 int main(int argc, char* argv[]) {
122 if (argc != 4) {
123 usage();
124 return 1;
125 }
126
127 char* end;
128 unsigned long int alignment = strtoul(argv[1], &end, 10);
129 if ((alignment == ULONG_MAX && errno == ERANGE) || *end != '\0') {
130 fprintf(stderr, "ALIGNMENT value is not a valid number: %s\n", argv[1]);
131 usage();
132 return 1;
133 }
134 if (((alignment - 1) & alignment) != 0) {
135 fprintf(stderr, "ALIGNMENT value is not a power of 2: %s\n", argv[1]);
136 return 1;
137 }
138
139 ZipArchiveHandle handle;
140
141 int32_t return_value = OpenArchive(argv[2], &handle);
142 if (return_value != 0) {
143 CloseArchive(handle);
144 fprintf(stderr, "Unable to open '%s': %s\n", argv[2], ErrorCodeString(return_value));
145 return false;
146 }
147
148 FILE* zip_dst = fopen(argv[3], "we");
149 if (zip_dst == nullptr) {
150 fprintf(stderr, "Unable to create '%s': %s\n", argv[3], strerror(errno));
151 return 1;
152 }
153
154 bool success = CreateAlignedZip(handle, zip_dst, static_cast<uint32_t>(alignment));
155
156 CloseArchive(handle);
157 fclose(zip_dst);
158
159 return success ? 0 : 1;
160 }
161