Add functions in recovery/minzip to libziparchive (18c25920) · Commits · e / os / android_system_core

include/ziparchive/zip_archive.h

+13 −0

Original line number	Diff line number	Diff line
		@@ -130,6 +130,8 @@ int32_t OpenArchive(const char* fileName, ZipArchiveHandle* handle);
		int32_t OpenArchiveFd(const int fd, const char* debugFileName,
		ZipArchiveHandle *handle, bool assume_ownership = true);

		int32_t OpenArchiveFromMemory(void* address, size_t length, const char* debugFileName,
		ZipArchiveHandle *handle);
		/*
		* Close archive, releasing resources associated with it. This will
		* unmap the central directory of the zipfile and free all internal
		@@ -214,6 +216,17 @@ int GetFileDescriptor(const ZipArchiveHandle handle);

		const char* ErrorCodeString(int32_t error_code);

		#if !defined(_WIN32)
		typedef bool (ProcessZipEntryFunction)(const uint8_t buf, size_t buf_size, void* cookie);

		/*
		* Stream the uncompressed data through the supplied function,
		* passing cookie to it each time it gets called.
		*/
		int32_t ProcessZipEntryContents(ZipArchiveHandle handle, ZipEntry* entry,
		ProcessZipEntryFunction func, void* cookie);
		#endif

		__END_DECLS

		#endif // LIBZIPARCHIVE_ZIPARCHIVE_H_

libziparchive/testdata/dummy-update.zip

0 → 100644

+1.04 MiB

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libziparchive/zip_archive.cc

+184 −66

Original line number	Diff line number	Diff line
		@@ -215,19 +215,14 @@ static int32_t AddToHash(ZipString *hash_table, const uint64_t hash_table_size,
		return 0;
		}

		static int32_t MapCentralDirectory0(int fd, const char* debug_file_name,
		ZipArchive* archive, off64_t file_length,
		off64_t read_amount, uint8_t* scan_buffer) {
		static int32_t MapCentralDirectory0(const char* debug_file_name, ZipArchive* archive,
		off64_t file_length, off64_t read_amount,
		uint8_t* scan_buffer) {
		const off64_t search_start = file_length - read_amount;

		if (lseek64(fd, search_start, SEEK_SET) != search_start) {
		ALOGW("Zip: seek %" PRId64 " failed: %s", static_cast<int64_t>(search_start),
		strerror(errno));
		return kIoError;
		}
		if (!android::base::ReadFully(fd, scan_buffer, static_cast<size_t>(read_amount))) {
		ALOGW("Zip: read %" PRId64 " failed: %s", static_cast<int64_t>(read_amount),
		strerror(errno));
		if(!archive->mapped_zip.ReadAtOffset(scan_buffer, read_amount, search_start)) {
		ALOGE("Zip: read %" PRId64 " from offset %" PRId64 " failed",
		static_cast<int64_t>(read_amount), static_cast<int64_t>(search_start));
		return kIoError;
		}

		@@ -287,9 +282,11 @@ static int32_t MapCentralDirectory0(int fd, const char* debug_file_name,
		* It all looks good. Create a mapping for the CD, and set the fields
		* in archive.
		*/
		if (!archive->directory_map.create(debug_file_name, fd,

		if (!archive->InitializeCentralDirectory(debug_file_name,
		static_cast<off64_t>(eocd->cd_start_offset),
		static_cast<size_t>(eocd->cd_size), true /* read only */) ) {
		static_cast<size_t>(eocd->cd_size))) {
		ALOGE("Zip: failed to intialize central directory.\n");
		return kMmapFailed;
		}

		@@ -304,18 +301,16 @@ static int32_t MapCentralDirectory0(int fd, const char* debug_file_name,
		*
		* On success, returns 0 after populating fields from the EOCD area:
		* directory_offset
		* directory_map
		* directory_ptr
		* num_entries
		*/
		static int32_t MapCentralDirectory(int fd, const char* debug_file_name,
		ZipArchive* archive) {
		static int32_t MapCentralDirectory(const char* debug_file_name, ZipArchive* archive) {

		// Test file length. We use lseek64 to make sure the file
		// is small enough to be a zip file (Its size must be less than
		// 0xffffffff bytes).
		off64_t file_length = lseek64(fd, 0, SEEK_END);
		off64_t file_length = archive->mapped_zip.GetFileLength();
		if (file_length == -1) {
		ALOGV("Zip: lseek on fd %d failed", fd);
		return kInvalidFile;
		}

		@@ -346,11 +341,9 @@ static int32_t MapCentralDirectory(int fd, const char* debug_file_name,
		read_amount = file_length;
		}

		uint8_t* scan_buffer = reinterpret_cast<uint8_t*>(malloc(read_amount));
		int32_t result = MapCentralDirectory0(fd, debug_file_name, archive,
		file_length, read_amount, scan_buffer);

		free(scan_buffer);
		std::vector<uint8_t> scan_buffer(read_amount);
		int32_t result = MapCentralDirectory0(debug_file_name, archive, file_length, read_amount,
		scan_buffer.data());
		return result;
		}

		@@ -361,9 +354,8 @@ static int32_t MapCentralDirectory(int fd, const char* debug_file_name,
		* Returns 0 on success.
		*/
		static int32_t ParseZipArchive(ZipArchive* archive) {
		const uint8_t* const cd_ptr =
		reinterpret_cast<const uint8_t*>(archive->directory_map.getDataPtr());
		const size_t cd_length = archive->directory_map.getDataLength();
		const uint8_t* const cd_ptr = archive->central_directory.GetBasePtr();
		const size_t cd_length = archive->central_directory.GetMapLength();
		const uint16_t num_entries = archive->num_entries;

		/*
		@@ -437,7 +429,7 @@ static int32_t ParseZipArchive(ZipArchive* archive) {
		static int32_t OpenArchiveInternal(ZipArchive* archive,
		const char* debug_file_name) {
		int32_t result = -1;
		if ((result = MapCentralDirectory(archive->fd, debug_file_name, archive))) {
		if ((result = MapCentralDirectory(debug_file_name, archive)) != 0) {
		return result;
		}

		@@ -468,6 +460,13 @@ int32_t OpenArchive(const char* fileName, ZipArchiveHandle* handle) {
		return OpenArchiveInternal(archive, fileName);
		}

		int32_t OpenArchiveFromMemory(void* address, size_t length, const char* debug_file_name,
		ZipArchiveHandle *handle) {
		ZipArchive* archive = new ZipArchive(address, length);
		*handle = archive;
		return OpenArchiveInternal(archive, debug_file_name);
		}

		/*
		* Close a ZipArchive, closing the file and freeing the contents.
		*/
		@@ -477,10 +476,10 @@ void CloseArchive(ZipArchiveHandle handle) {
		delete archive;
		}

		static int32_t UpdateEntryFromDataDescriptor(int fd,
		static int32_t UpdateEntryFromDataDescriptor(MappedZipFile& mapped_zip,
		ZipEntry *entry) {
		uint8_t ddBuf[sizeof(DataDescriptor) + sizeof(DataDescriptor::kOptSignature)];
		if (!android::base::ReadFully(fd, ddBuf, sizeof(ddBuf))) {
		if (!mapped_zip.ReadData(ddBuf, sizeof(ddBuf))) {
		return kIoError;
		}

		@@ -495,23 +494,6 @@ static int32_t UpdateEntryFromDataDescriptor(int fd,
		return 0;
		}

		// Attempts to read \|len\| bytes into \|buf\| at offset \|off\|.
		// On non-Windows platforms, callers are guaranteed that the \|fd\|
		// offset is unchanged and there is no side effect to this call.
		//
		// On Windows platforms this is not thread-safe.
		static inline bool ReadAtOffset(int fd, uint8_t* buf, size_t len, off64_t off) {
		#if !defined(_WIN32)
		return TEMP_FAILURE_RETRY(pread64(fd, buf, len, off));
		#else
		if (lseek64(fd, off, SEEK_SET) != off) {
		ALOGW("Zip: failed seek to offset %" PRId64, off);
		return false;
		}
		return android::base::ReadFully(fd, buf, len);
		#endif
		}

		static int32_t FindEntry(const ZipArchive* archive, const int ent,
		ZipEntry* data) {
		const uint16_t nameLen = archive->hash_table[ent].name_length;
		@@ -525,9 +507,8 @@ static int32_t FindEntry(const ZipArchive* archive, const int ent,
		// This is the base of our mmapped region, we have to sanity check that
		// the name that's in the hash table is a pointer to a location within
		// this mapped region.
		const uint8_t* base_ptr = reinterpret_cast<const uint8_t*>(
		archive->directory_map.getDataPtr());
		if (ptr < base_ptr \|\| ptr > base_ptr + archive->directory_map.getDataLength()) {
		const uint8_t* base_ptr = archive->central_directory.GetBasePtr();
		if (ptr < base_ptr \|\| ptr > base_ptr + archive->central_directory.GetMapLength()) {
		ALOGW("Zip: Invalid entry pointer");
		return kInvalidOffset;
		}
		@@ -559,7 +540,7 @@ static int32_t FindEntry(const ZipArchive* archive, const int ent,
		}

		uint8_t lfh_buf[sizeof(LocalFileHeader)];
		if (!ReadAtOffset(archive->fd, lfh_buf, sizeof(lfh_buf), local_header_offset)) {
		if (!archive->mapped_zip.ReadAtOffset(lfh_buf, sizeof(lfh_buf), local_header_offset)) {
		ALOGW("Zip: failed reading lfh name from offset %" PRId64,
		static_cast<int64_t>(local_header_offset));
		return kIoError;
		@@ -599,19 +580,16 @@ static int32_t FindEntry(const ZipArchive* archive, const int ent,
		return kInvalidOffset;
		}

		uint8_t* name_buf = reinterpret_cast<uint8_t*>(malloc(nameLen));
		if (!ReadAtOffset(archive->fd, name_buf, nameLen, name_offset)) {
		std::vector<uint8_t> name_buf(nameLen);
		if (!archive->mapped_zip.ReadAtOffset(name_buf.data(), nameLen, name_offset)) {
		ALOGW("Zip: failed reading lfh name from offset %" PRId64, static_cast<int64_t>(name_offset));
		free(name_buf);
		return kIoError;
		}

		if (memcmp(archive->hash_table[ent].name, name_buf, nameLen)) {
		free(name_buf);
		if (memcmp(archive->hash_table[ent].name, name_buf.data(), nameLen)) {
		return kInconsistentInformation;
		}

		free(name_buf);
		} else {
		ALOGW("Zip: lfh name did not match central directory.");
		return kInconsistentInformation;
		@@ -881,7 +859,7 @@ static inline int zlib_inflateInit2(z_stream* stream, int window_bits) {
		}
		#pragma GCC diagnostic pop

		static int32_t InflateEntryToWriter(int fd, const ZipEntry* entry,
		static int32_t InflateEntryToWriter(MappedZipFile& mapped_zip, const ZipEntry* entry,
		Writer* writer, uint64_t* crc_out) {
		const size_t kBufSize = 32768;
		std::vector<uint8_t> read_buf(kBufSize);
		@@ -931,7 +909,7 @@ static int32_t InflateEntryToWriter(int fd, const ZipEntry* entry,
		/* read as much as we can */
		if (zstream.avail_in == 0) {
		const size_t getSize = (compressed_length > kBufSize) ? kBufSize : compressed_length;
		if (!android::base::ReadFully(fd, read_buf.data(), getSize)) {
		if (!mapped_zip.ReadData(read_buf.data(), getSize)) {
		ALOGW("Zip: inflate read failed, getSize = %zu: %s", getSize, strerror(errno));
		return kIoError;
		}
		@@ -979,7 +957,7 @@ static int32_t InflateEntryToWriter(int fd, const ZipEntry* entry,
		return 0;
		}

		static int32_t CopyEntryToWriter(int fd, const ZipEntry* entry, Writer* writer,
		static int32_t CopyEntryToWriter(MappedZipFile& mapped_zip, const ZipEntry* entry, Writer* writer,
		uint64_t *crc_out) {
		static const uint32_t kBufSize = 32768;
		std::vector<uint8_t> buf(kBufSize);
		@@ -993,7 +971,7 @@ static int32_t CopyEntryToWriter(int fd, const ZipEntry* entry, Writer* writer,
		// Safe conversion because kBufSize is narrow enough for a 32 bit signed
		// value.
		const size_t block_size = (remaining > kBufSize) ? kBufSize : remaining;
		if (!android::base::ReadFully(fd, buf.data(), block_size)) {
		if (!mapped_zip.ReadData(buf.data(), block_size)) {
		ALOGW("CopyFileToFile: copy read failed, block_size = %zu: %s", block_size, strerror(errno));
		return kIoError;
		}
		@@ -1016,7 +994,7 @@ int32_t ExtractToWriter(ZipArchiveHandle handle,
		const uint16_t method = entry->method;
		off64_t data_offset = entry->offset;

		if (lseek64(archive->fd, data_offset, SEEK_SET) != data_offset) {
		if (!archive->mapped_zip.SeekToOffset(data_offset)) {
		ALOGW("Zip: lseek to data at %" PRId64 " failed", static_cast<int64_t>(data_offset));
		return kIoError;
		}
		@@ -1025,13 +1003,13 @@ int32_t ExtractToWriter(ZipArchiveHandle handle,
		int32_t return_value = -1;
		uint64_t crc = 0;
		if (method == kCompressStored) {
		return_value = CopyEntryToWriter(archive->fd, entry, writer, &crc);
		return_value = CopyEntryToWriter(archive->mapped_zip, entry, writer, &crc);
		} else if (method == kCompressDeflated) {
		return_value = InflateEntryToWriter(archive->fd, entry, writer, &crc);
		return_value = InflateEntryToWriter(archive->mapped_zip, entry, writer, &crc);
		}

		if (!return_value && entry->has_data_descriptor) {
		return_value = UpdateEntryFromDataDescriptor(archive->fd, entry);
		return_value = UpdateEntryFromDataDescriptor(archive->mapped_zip, entry);
		if (return_value) {
		return return_value;
		}
		@@ -1072,7 +1050,7 @@ const char* ErrorCodeString(int32_t error_code) {
		}

		int GetFileDescriptor(const ZipArchiveHandle handle) {
		return reinterpret_cast<ZipArchive*>(handle)->fd;
		return reinterpret_cast<ZipArchive*>(handle)->mapped_zip.GetFileDescriptor();
		}

		ZipString::ZipString(const char* entry_name)
		@@ -1081,3 +1059,143 @@ ZipString::ZipString(const char* entry_name)
		CHECK_LE(len, static_cast<size_t>(UINT16_MAX));
		name_length = static_cast<uint16_t>(len);
		}

		#if !defined(_WIN32)
		class ProcessWriter : public Writer {
		public:
		ProcessWriter(ProcessZipEntryFunction func, void* cookie) : Writer(),
		proc_function_(func),
		cookie_(cookie) {
		}

		virtual bool Append(uint8_t* buf, size_t buf_size) override {
		return proc_function_(buf, buf_size, cookie_);
		}

		private:
		ProcessZipEntryFunction proc_function_;
		void* cookie_;
		};

		int32_t ProcessZipEntryContents(ZipArchiveHandle handle, ZipEntry* entry,
		ProcessZipEntryFunction func, void* cookie) {
		ProcessWriter writer(func, cookie);
		return ExtractToWriter(handle, entry, &writer);
		}

		#endif //!defined(_WIN32)

		int MappedZipFile::GetFileDescriptor() const {
		if (!has_fd_) {
		ALOGW("Zip: MappedZipFile doesn't have a file descriptor.");
		return -1;
		}
		return fd_;
		}

		void* MappedZipFile::GetBasePtr() const {
		if (has_fd_) {
		ALOGW("Zip: MappedZipFile doesn't have a base pointer.");
		return nullptr;
		}
		return base_ptr_;
		}

		off64_t MappedZipFile::GetFileLength() const {
		if (has_fd_) {
		off64_t result = lseek64(fd_, 0, SEEK_END);
		if (result == -1) {
		ALOGE("Zip: lseek on fd %d failed: %s", fd_, strerror(errno));
		}
		return result;
		} else {
		if (base_ptr_ == nullptr) {
		ALOGE("Zip: invalid file map\n");
		return -1;
		}
		return static_cast<off64_t>(data_length_);
		}
		}

		bool MappedZipFile::SeekToOffset(off64_t offset) {
		if (has_fd_) {
		if (lseek64(fd_, offset, SEEK_SET) != offset) {
		ALOGE("Zip: lseek to %" PRId64 " failed: %s\n", offset, strerror(errno));
		return false;
		}
		return true;
		} else {
		if (offset < 0 \|\| offset > static_cast<off64_t>(data_length_)) {
		ALOGE("Zip: invalid offset: %" PRId64 ", data length: %" PRId64 "\n" , offset,
		data_length_);
		return false;
		}

		read_pos_ = offset;
		return true;
		}
		}

		bool MappedZipFile::ReadData(uint8_t* buffer, size_t read_amount) {
		if (has_fd_) {
		if(!android::base::ReadFully(fd_, buffer, read_amount)) {
		ALOGE("Zip: read from %d failed\n", fd_);
		return false;
		}
		} else {
		memcpy(buffer, static_cast<uint8_t*>(base_ptr_) + read_pos_, read_amount);
		read_pos_ += read_amount;
		}
		return true;
		}

		// Attempts to read \|len\| bytes into \|buf\| at offset \|off\|.
		bool MappedZipFile::ReadAtOffset(uint8_t* buf, size_t len, off64_t off) {
		#if !defined(_WIN32)
		if (has_fd_) {
		if (static_cast<size_t>(TEMP_FAILURE_RETRY(pread64(fd_, buf, len, off))) != len) {
		ALOGE("Zip: failed to read at offset %" PRId64 "\n", off);
		return false;
		}
		return true;
		}
		#endif
		if (!SeekToOffset(off)) {
		return false;
		}
		return ReadData(buf, len);

		}

		void CentralDirectory::Initialize(void* map_base_ptr, off64_t cd_start_offset, size_t cd_size) {
		base_ptr_ = static_cast<uint8_t*>(map_base_ptr) + cd_start_offset;
		length_ = cd_size;
		}

		bool ZipArchive::InitializeCentralDirectory(const char* debug_file_name, off64_t cd_start_offset,
		size_t cd_size) {
		if (mapped_zip.HasFd()) {
		if (!directory_map->create(debug_file_name, mapped_zip.GetFileDescriptor(),
		cd_start_offset, cd_size, true /* read only */)) {
		return false;
		}

		CHECK_EQ(directory_map->getDataLength(), cd_size);
		central_directory.Initialize(directory_map->getDataPtr(), 0/offset/, cd_size);
		} else {
		if (mapped_zip.GetBasePtr() == nullptr) {
		ALOGE("Zip: Failed to map central directory, bad mapped_zip base pointer\n");
		return false;
		}
		if (static_cast<off64_t>(cd_start_offset) + static_cast<off64_t>(cd_size) >
		mapped_zip.GetFileLength()) {
		ALOGE("Zip: Failed to map central directory, offset exceeds mapped memory region ("
		"start_offset %" PRId64 ", cd_size %zu, mapped_region_size %" PRId64 ")",
		static_cast<int64_t>(cd_start_offset), cd_size, mapped_zip.GetFileLength());
		return false;
		}

		central_directory.Initialize(mapped_zip.GetBasePtr(), cd_start_offset, cd_size);
		}
		return true;
		}

libziparchive/zip_archive_private.h

+92 −10

Original line number	Diff line number	Diff line
		@@ -21,17 +21,83 @@
		#include <stdlib.h>
		#include <unistd.h>

		#include <memory>
		#include <vector>

		#include <utils/FileMap.h>
		#include <ziparchive/zip_archive.h>

		class MappedZipFile {
		public:
		explicit MappedZipFile(const int fd) :
		has_fd_(true),
		fd_(fd),
		base_ptr_(nullptr),
		data_length_(0),
		read_pos_(0) {}

		explicit MappedZipFile(void* address, size_t length) :
		has_fd_(false),
		fd_(-1),
		base_ptr_(address),
		data_length_(static_cast<off64_t>(length)),
		read_pos_(0) {}

		bool HasFd() const {return has_fd_;}

		int GetFileDescriptor() const;

		void* GetBasePtr() const;

		off64_t GetFileLength() const;

		bool SeekToOffset(off64_t offset);

		bool ReadData(uint8_t* buffer, size_t read_amount);

		bool ReadAtOffset(uint8_t* buf, size_t len, off64_t off);

		private:
		// If has_fd_ is true, fd is valid and we'll read contents of a zip archive
		// from the file. Otherwise, we're opening the archive from a memory mapped
		// file. In that case, base_ptr_ points to the start of the memory region and
		// data_length_ defines the file length.
		const bool has_fd_;

		const int fd_;

		void* const base_ptr_;
		const off64_t data_length_;
		// read_pos_ is the offset to the base_ptr_ where we read data from.
		size_t read_pos_;
		};

		class CentralDirectory {
		public:
		CentralDirectory(void) :
		base_ptr_(nullptr),
		length_(0) {}

		const uint8_t* GetBasePtr() const {return base_ptr_;}

		size_t GetMapLength() const {return length_;}

		void Initialize(void* map_base_ptr, off64_t cd_start_offset, size_t cd_size);

		private:
		const uint8_t* base_ptr_;
		size_t length_;
		};

		struct ZipArchive {
		// open Zip archive
		const int fd;
		mutable MappedZipFile mapped_zip;
		const bool close_file;

		// mapped central directory area
		off64_t directory_offset;
		android::FileMap directory_map;
		CentralDirectory central_directory;
		std::unique_ptr<android::FileMap> directory_map;

		// number of entries in the Zip archive
		uint16_t num_entries;
		@@ -44,20 +110,36 @@ struct ZipArchive {
		ZipString* hash_table;

		ZipArchive(const int fd, bool assume_ownership) :
		fd(fd),
		mapped_zip(fd),
		close_file(assume_ownership),
		directory_offset(0),
		central_directory(),
		directory_map(new android::FileMap()),
		num_entries(0),
		hash_table_size(0),
		hash_table(NULL) {}
		hash_table(nullptr) {}

		ZipArchive(void* address, size_t length) :
		mapped_zip(address, length),
		close_file(false),
		directory_offset(0),
		central_directory(),
		directory_map(new android::FileMap()),
		num_entries(0),
		hash_table_size(0),
		hash_table(nullptr) {}

		~ZipArchive() {
		if (close_file && fd >= 0) {
		close(fd);
		if (close_file && mapped_zip.GetFileDescriptor() >= 0) {
		close(mapped_zip.GetFileDescriptor());
		}

		free(hash_table);
		}

		bool InitializeCentralDirectory(const char* debug_file_name, off64_t cd_start_offset,
		size_t cd_size);

		};

		#endif // LIBZIPARCHIVE_ZIPARCHIVE_PRIVATE_H_

libziparchive/zip_archive_stream_entry.cc

+3 −3

Original line number	Diff line number	Diff line
		@@ -39,7 +39,7 @@ static constexpr size_t kBufSize = 65535;
		bool ZipArchiveStreamEntry::Init(const ZipEntry& entry) {
		ZipArchive* archive = reinterpret_cast<ZipArchive*>(handle_);
		off64_t data_offset = entry.offset;
		if (lseek64(archive->fd, data_offset, SEEK_SET) != data_offset) {
		if (!archive->mapped_zip.SeekToOffset(data_offset)) {
		ALOGW("lseek to data at %" PRId64 " failed: %s", data_offset, strerror(errno));
		return false;
		}
		@@ -88,7 +88,7 @@ const std::vector<uint8_t>* ZipArchiveStreamEntryUncompressed::Read() {
		size_t bytes = (length_ > data_.size()) ? data_.size() : length_;
		ZipArchive* archive = reinterpret_cast<ZipArchive*>(handle_);
		errno = 0;
		if (!android::base::ReadFully(archive->fd, data_.data(), bytes)) {
		if (!archive->mapped_zip.ReadData(data_.data(), bytes)) {
		if (errno != 0) {
		ALOGE("Error reading from archive fd: %s", strerror(errno));
		} else {
		@@ -209,7 +209,7 @@ const std::vector<uint8_t>* ZipArchiveStreamEntryCompressed::Read() {
		size_t bytes = (compressed_length_ > in_.size()) ? in_.size() : compressed_length_;
		ZipArchive* archive = reinterpret_cast<ZipArchive*>(handle_);
		errno = 0;
		if (!android::base::ReadFully(archive->fd, in_.data(), bytes)) {
		if (!archive->mapped_zip.ReadData(in_.data(), bytes)) {
		if (errno != 0) {
		ALOGE("Error reading from archive fd: %s", strerror(errno));
		} else {