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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ziparchive/zip_writer.h"
#include "ziparchive/zip_archive.h"
#include <android-base/test_utils.h>
#include <gtest/gtest.h>
#include <time.h>
#include <memory>
#include <vector>
static ::testing::AssertionResult AssertFileEntryContentsEq(const std::string& expected,
ZipArchiveHandle handle,
ZipEntry* zip_entry);
struct zipwriter : public ::testing::Test {
TemporaryFile* temp_file_;
int fd_;
FILE* file_;
void SetUp() override {
temp_file_ = new TemporaryFile();
fd_ = temp_file_->fd;
file_ = fdopen(fd_, "w");
ASSERT_NE(file_, nullptr);
}
void TearDown() override {
fclose(file_);
delete temp_file_;
}
};
TEST_F(zipwriter, WriteUncompressedZipWithOneFile) {
ZipWriter writer(file_);
const char* expected = "hello";
ASSERT_EQ(0, writer.StartEntry("file.txt", 0));
ASSERT_EQ(0, writer.WriteBytes("he", 2));
ASSERT_EQ(0, writer.WriteBytes("llo", 3));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.Finish());
ASSERT_GE(0, lseek(fd_, 0, SEEK_SET));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFd(fd_, "temp", &handle, false));
ZipEntry data;
ASSERT_EQ(0, FindEntry(handle, ZipString("file.txt"), &data));
EXPECT_EQ(kCompressStored, data.method);
EXPECT_EQ(0u, data.has_data_descriptor);
EXPECT_EQ(strlen(expected), data.compressed_length);
ASSERT_EQ(strlen(expected), data.uncompressed_length);
ASSERT_TRUE(AssertFileEntryContentsEq(expected, handle, &data));
CloseArchive(handle);
}
TEST_F(zipwriter, WriteUncompressedZipWithMultipleFiles) {
ZipWriter writer(file_);
ASSERT_EQ(0, writer.StartEntry("file.txt", 0));
ASSERT_EQ(0, writer.WriteBytes("he", 2));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.StartEntry("file/file.txt", 0));
ASSERT_EQ(0, writer.WriteBytes("llo", 3));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.StartEntry("file/file2.txt", 0));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.Finish());
ASSERT_GE(0, lseek(fd_, 0, SEEK_SET));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFd(fd_, "temp", &handle, false));
ZipEntry data;
ASSERT_EQ(0, FindEntry(handle, ZipString("file.txt"), &data));
EXPECT_EQ(kCompressStored, data.method);
EXPECT_EQ(2u, data.compressed_length);
ASSERT_EQ(2u, data.uncompressed_length);
ASSERT_TRUE(AssertFileEntryContentsEq("he", handle, &data));
ASSERT_EQ(0, FindEntry(handle, ZipString("file/file.txt"), &data));
EXPECT_EQ(kCompressStored, data.method);
EXPECT_EQ(3u, data.compressed_length);
ASSERT_EQ(3u, data.uncompressed_length);
ASSERT_TRUE(AssertFileEntryContentsEq("llo", handle, &data));
ASSERT_EQ(0, FindEntry(handle, ZipString("file/file2.txt"), &data));
EXPECT_EQ(kCompressStored, data.method);
EXPECT_EQ(0u, data.compressed_length);
EXPECT_EQ(0u, data.uncompressed_length);
CloseArchive(handle);
}
TEST_F(zipwriter, WriteUncompressedZipFileWithAlignedFlag) {
ZipWriter writer(file_);
ASSERT_EQ(0, writer.StartEntry("align.txt", ZipWriter::kAlign32));
ASSERT_EQ(0, writer.WriteBytes("he", 2));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.Finish());
ASSERT_GE(0, lseek(fd_, 0, SEEK_SET));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFd(fd_, "temp", &handle, false));
ZipEntry data;
ASSERT_EQ(0, FindEntry(handle, ZipString("align.txt"), &data));
EXPECT_EQ(0, data.offset & 0x03);
CloseArchive(handle);
}
static struct tm MakeTm() {
struct tm tm;
memset(&tm, 0, sizeof(struct tm));
tm.tm_year = 2001 - 1900;
tm.tm_mon = 1;
tm.tm_mday = 12;
tm.tm_hour = 18;
tm.tm_min = 30;
tm.tm_sec = 20;
return tm;
}
TEST_F(zipwriter, WriteUncompressedZipFileWithAlignedFlagAndTime) {
ZipWriter writer(file_);
struct tm tm = MakeTm();
time_t time = mktime(&tm);
ASSERT_EQ(0, writer.StartEntryWithTime("align.txt", ZipWriter::kAlign32, time));
ASSERT_EQ(0, writer.WriteBytes("he", 2));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.Finish());
ASSERT_GE(0, lseek(fd_, 0, SEEK_SET));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFd(fd_, "temp", &handle, false));
ZipEntry data;
ASSERT_EQ(0, FindEntry(handle, ZipString("align.txt"), &data));
EXPECT_EQ(0, data.offset & 0x03);
struct tm mod = data.GetModificationTime();
EXPECT_EQ(tm.tm_sec, mod.tm_sec);
EXPECT_EQ(tm.tm_min, mod.tm_min);
EXPECT_EQ(tm.tm_hour, mod.tm_hour);
EXPECT_EQ(tm.tm_mday, mod.tm_mday);
EXPECT_EQ(tm.tm_mon, mod.tm_mon);
EXPECT_EQ(tm.tm_year, mod.tm_year);
CloseArchive(handle);
}
TEST_F(zipwriter, WriteUncompressedZipFileWithAlignedValue) {
ZipWriter writer(file_);
ASSERT_EQ(0, writer.StartAlignedEntry("align.txt", 0, 4096));
ASSERT_EQ(0, writer.WriteBytes("he", 2));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.Finish());
ASSERT_GE(0, lseek(fd_, 0, SEEK_SET));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFd(fd_, "temp", &handle, false));
ZipEntry data;
ASSERT_EQ(0, FindEntry(handle, ZipString("align.txt"), &data));
EXPECT_EQ(0, data.offset & 0xfff);
CloseArchive(handle);
}
TEST_F(zipwriter, WriteUncompressedZipFileWithAlignedValueAndTime) {
ZipWriter writer(file_);
struct tm tm = MakeTm();
time_t time = mktime(&tm);
ASSERT_EQ(0, writer.StartAlignedEntryWithTime("align.txt", 0, time, 4096));
ASSERT_EQ(0, writer.WriteBytes("he", 2));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.Finish());
ASSERT_GE(0, lseek(fd_, 0, SEEK_SET));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFd(fd_, "temp", &handle, false));
ZipEntry data;
ASSERT_EQ(0, FindEntry(handle, ZipString("align.txt"), &data));
EXPECT_EQ(0, data.offset & 0xfff);
struct tm mod = data.GetModificationTime();
EXPECT_EQ(tm.tm_sec, mod.tm_sec);
EXPECT_EQ(tm.tm_min, mod.tm_min);
EXPECT_EQ(tm.tm_hour, mod.tm_hour);
EXPECT_EQ(tm.tm_mday, mod.tm_mday);
EXPECT_EQ(tm.tm_mon, mod.tm_mon);
EXPECT_EQ(tm.tm_year, mod.tm_year);
CloseArchive(handle);
}
TEST_F(zipwriter, WriteCompressedZipWithOneFile) {
ZipWriter writer(file_);
ASSERT_EQ(0, writer.StartEntry("file.txt", ZipWriter::kCompress));
ASSERT_EQ(0, writer.WriteBytes("helo", 4));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.Finish());
ASSERT_GE(0, lseek(fd_, 0, SEEK_SET));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFd(fd_, "temp", &handle, false));
ZipEntry data;
ASSERT_EQ(0, FindEntry(handle, ZipString("file.txt"), &data));
EXPECT_EQ(kCompressDeflated, data.method);
ASSERT_EQ(4u, data.uncompressed_length);
ASSERT_TRUE(AssertFileEntryContentsEq("helo", handle, &data));
CloseArchive(handle);
}
TEST_F(zipwriter, WriteCompressedZipFlushFull) {
// This exact data will cause the Finish() to require multiple calls
// to deflate() because the ZipWriter buffer isn't big enough to hold
// the entire compressed data buffer.
constexpr size_t kBufSize = 10000000;
std::vector<uint8_t> buffer(kBufSize);
size_t prev = 1;
for (size_t i = 0; i < kBufSize; i++) {
buffer[i] = i + prev;
prev = i;
}
ZipWriter writer(file_);
ASSERT_EQ(0, writer.StartEntry("file.txt", ZipWriter::kCompress));
ASSERT_EQ(0, writer.WriteBytes(buffer.data(), buffer.size()));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.Finish());
ASSERT_GE(0, lseek(fd_, 0, SEEK_SET));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFd(fd_, "temp", &handle, false));
ZipEntry data;
ASSERT_EQ(0, FindEntry(handle, ZipString("file.txt"), &data));
EXPECT_EQ(kCompressDeflated, data.method);
EXPECT_EQ(kBufSize, data.uncompressed_length);
std::vector<uint8_t> decompress(kBufSize);
memset(decompress.data(), 0, kBufSize);
ASSERT_EQ(0, ExtractToMemory(handle, &data, decompress.data(), decompress.size()));
EXPECT_EQ(0, memcmp(decompress.data(), buffer.data(), kBufSize))
<< "Input buffer and output buffer are different.";
CloseArchive(handle);
}
TEST_F(zipwriter, CheckStartEntryErrors) {
ZipWriter writer(file_);
ASSERT_EQ(-5, writer.StartAlignedEntry("align.txt", ZipWriter::kAlign32, 4096));
ASSERT_EQ(-6, writer.StartAlignedEntry("align.txt", 0, 3));
}
TEST_F(zipwriter, BackupRemovesTheLastFile) {
ZipWriter writer(file_);
const char* kKeepThis = "keep this";
const char* kDropThis = "drop this";
const char* kReplaceWithThis = "replace with this";
ZipWriter::FileEntry entry;
EXPECT_LT(writer.GetLastEntry(&entry), 0);
ASSERT_EQ(0, writer.StartEntry("keep.txt", 0));
ASSERT_EQ(0, writer.WriteBytes(kKeepThis, strlen(kKeepThis)));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.GetLastEntry(&entry));
EXPECT_EQ("keep.txt", entry.path);
ASSERT_EQ(0, writer.StartEntry("drop.txt", 0));
ASSERT_EQ(0, writer.WriteBytes(kDropThis, strlen(kDropThis)));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.GetLastEntry(&entry));
EXPECT_EQ("drop.txt", entry.path);
ASSERT_EQ(0, writer.DiscardLastEntry());
ASSERT_EQ(0, writer.GetLastEntry(&entry));
EXPECT_EQ("keep.txt", entry.path);
ASSERT_EQ(0, writer.StartEntry("replace.txt", 0));
ASSERT_EQ(0, writer.WriteBytes(kReplaceWithThis, strlen(kReplaceWithThis)));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.GetLastEntry(&entry));
EXPECT_EQ("replace.txt", entry.path);
ASSERT_EQ(0, writer.Finish());
// Verify that "drop.txt" does not exist.
ASSERT_GE(0, lseek(fd_, 0, SEEK_SET));
ZipArchiveHandle handle;
ASSERT_EQ(0, OpenArchiveFd(fd_, "temp", &handle, false));
ZipEntry data;
ASSERT_EQ(0, FindEntry(handle, ZipString("keep.txt"), &data));
ASSERT_TRUE(AssertFileEntryContentsEq(kKeepThis, handle, &data));
ASSERT_NE(0, FindEntry(handle, ZipString("drop.txt"), &data));
ASSERT_EQ(0, FindEntry(handle, ZipString("replace.txt"), &data));
ASSERT_TRUE(AssertFileEntryContentsEq(kReplaceWithThis, handle, &data));
CloseArchive(handle);
}
TEST_F(zipwriter, TruncateFileAfterBackup) {
ZipWriter writer(file_);
const char* kSmall = "small";
ASSERT_EQ(0, writer.StartEntry("small.txt", 0));
ASSERT_EQ(0, writer.WriteBytes(kSmall, strlen(kSmall)));
ASSERT_EQ(0, writer.FinishEntry());
ASSERT_EQ(0, writer.StartEntry("large.txt", 0));
std::vector<uint8_t> data;
data.resize(1024 * 1024, 0xef);
ASSERT_EQ(0, writer.WriteBytes(data.data(), data.size()));
ASSERT_EQ(0, writer.FinishEntry());
off_t before_len = ftello(file_);
ZipWriter::FileEntry entry;
ASSERT_EQ(0, writer.GetLastEntry(&entry));
ASSERT_EQ(0, writer.DiscardLastEntry());
ASSERT_EQ(0, writer.Finish());
off_t after_len = ftello(file_);
ASSERT_GT(before_len, after_len);
}
static ::testing::AssertionResult AssertFileEntryContentsEq(const std::string& expected,
ZipArchiveHandle handle,
ZipEntry* zip_entry) {
if (expected.size() != zip_entry->uncompressed_length) {
return ::testing::AssertionFailure()
<< "uncompressed entry size " << zip_entry->uncompressed_length
<< " does not match expected size " << expected.size();
}
std::string actual;
actual.resize(expected.size());
uint8_t* buffer = reinterpret_cast<uint8_t*>(&*actual.begin());
if (ExtractToMemory(handle, zip_entry, buffer, actual.size()) != 0) {
return ::testing::AssertionFailure() << "failed to extract entry";
}
if (expected != actual) {
return ::testing::AssertionFailure() << "actual zip_entry data '" << actual
<< "' does not match expected '" << expected << "'";
}
return ::testing::AssertionSuccess();
}