Package jadx.zip.parser

Class JadxZipParser

java.lang.Object

jadx.zip.parser.JadxZipParser

All Implemented Interfaces:

IZipParser, Closeable, AutoCloseable

public final class JadxZipParser
extends Object
implements IZipParser

Custom and simple zip parser to fight tampering. Many zip features aren't supported: - Compression methods other than STORE or DEFLATE - Zip64 - Checksum verification - Multi file archives

Field Summary

Fields

Modifier and Type	Field	Description
private @Nullable ByteBuffer	byteBuffer
private static final int	CD_SIGN
private static final int	END_OF_CD_SIGN
private int	endOfCDStart
private @Nullable ZipContent	fallbackZipContent
private @Nullable RandomAccessFile	file
private @Nullable FileChannel	fileChannel
private final Set<ZipReaderFlags>	flags
private static final int	LOCAL_FILE_HEADER_SIGN
private static final byte	LOCAL_FILE_HEADER_START
private static final org.slf4j.Logger	LOG
private final ZipReaderOptions	options
private final boolean	useLimitedDataStream
private final boolean	verify
private final File	zipFile
private final IJadxZipSecurity	zipSecurity

Constructor Summary

Constructors

Constructor	Description
JadxZipParser(File zipFile, ZipReaderOptions options)

Method Summary

Modifier and Type	Method	Description
(package private) static byte[]	bufferToBytes(ByteBuffer buf, int start, int size)
(package private) static InputStream	bufferToStream(ByteBuffer buf, int start, int size)
boolean	canOpen()
void	close()
private static void	compareCDAndLFH(ByteBuffer buf, int start, JadxZipEntry entry)
private void	entryParseFailed(JadxZipEntry entry, Exception e)
private JadxZipEntry	fixEntryFromCD(JadxZipEntry entry, int start)
private ByteBuffer	getBuffer()
(package private) byte[]	getBytes(JadxZipEntry entry)
(package private) InputStream	getInputStream(JadxZipEntry entry)
File	getZipFile()
private ZipContent	initFallbackParser()
private boolean	isEncrypted(JadxZipEntry entry)
private boolean	isValidEntry(JadxZipEntry zipEntry)
private void	load()
private JadxZipEntry	loadCDEntry()
private JadxZipEntry	loadFileEntry(int start)
private List<IZipEntry>	loadFromCentralDirs(int maxEntriesCount)
ZipContent	open()
private int	readFlags(JadxZipEntry entry)
private static String	readString(ByteBuffer buf, int fileNameLen)
private static int	readU2(ByteBuffer buf)
private int	searchEndOfCDStart()
private int	searchEntryStart()
private List<IZipEntry>	searchLocalFileHeaders(int maxEntriesCount)
String	toString()
private IZipEntry	useFallbackParser(JadxZipEntry entry)
private static void	verifyEntry(JadxZipEntry entry)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

LOG

private static final org.slf4j.Logger LOG

LOCAL_FILE_HEADER_START

private static final byte LOCAL_FILE_HEADER_START

See Also:

• Constant Field Values

LOCAL_FILE_HEADER_SIGN

private static final int LOCAL_FILE_HEADER_SIGN

See Also:

• Constant Field Values

CD_SIGN

private static final int CD_SIGN

See Also:

• Constant Field Values

END_OF_CD_SIGN

private static final int END_OF_CD_SIGN

See Also:

• Constant Field Values

zipFile

private final File zipFile

options

private final ZipReaderOptions options

zipSecurity

private final IJadxZipSecurity zipSecurity

flags

private final Set<ZipReaderFlags> flags

verify

private final boolean verify

useLimitedDataStream

private final boolean useLimitedDataStream

file

@Nullable
private @Nullable RandomAccessFile file

fileChannel

@Nullable
private @Nullable FileChannel fileChannel

byteBuffer

@Nullable
private @Nullable ByteBuffer byteBuffer

endOfCDStart

private int endOfCDStart

fallbackZipContent

@Nullable
private @Nullable ZipContent fallbackZipContent

Constructor Details

JadxZipParser

public JadxZipParser(File zipFile,
 ZipReaderOptions options)

Method Details

open

public ZipContent open()
                throws IOException

Specified by:

open in interface IZipParser

Throws:

IOException

canOpen

public boolean canOpen()

isValidEntry

private boolean isValidEntry(JadxZipEntry zipEntry)

getBuffer

private ByteBuffer getBuffer()

load

private void load()
           throws IOException

Throws:

IOException

searchLocalFileHeaders

private List<IZipEntry> searchLocalFileHeaders(int maxEntriesCount)

loadFromCentralDirs

private List<IZipEntry> loadFromCentralDirs(int maxEntriesCount)
                                     throws IOException

Throws:

IOException

loadCDEntry

private JadxZipEntry loadCDEntry()

fixEntryFromCD

private JadxZipEntry fixEntryFromCD(JadxZipEntry entry,
 int start)

compareCDAndLFH

private static void compareCDAndLFH(ByteBuffer buf,
 int start,
 JadxZipEntry entry)

loadFileEntry

private JadxZipEntry loadFileEntry(int start)

searchEndOfCDStart

private int searchEndOfCDStart()
                        throws IOException

Throws:

IOException

searchEntryStart

private int searchEntryStart()

getInputStream

InputStream getInputStream(JadxZipEntry entry)

getBytes

byte[] getBytes(JadxZipEntry entry)

verifyEntry

private static void verifyEntry(JadxZipEntry entry)

entryParseFailed

private void entryParseFailed(JadxZipEntry entry,
 Exception e)

useFallbackParser

private IZipEntry useFallbackParser(JadxZipEntry entry)

initFallbackParser

private ZipContent initFallbackParser()

isEncrypted

private boolean isEncrypted(JadxZipEntry entry)

readFlags

private int readFlags(JadxZipEntry entry)

bufferToBytes

static byte[] bufferToBytes(ByteBuffer buf,
 int start,
 int size)

bufferToStream

static InputStream bufferToStream(ByteBuffer buf,
 int start,
 int size)

readU2

private static int readU2(ByteBuffer buf)

readString

private static String readString(ByteBuffer buf,
 int fileNameLen)

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException

getZipFile

public File getZipFile()

toString

public String toString()

Overrides:

toString in class Object