Class AesCipherInputStream

java.lang.Object

java.io.InputStream

net.lingala.zip4j.io.inputstream.CipherInputStream<AESDecrypter>

net.lingala.zip4j.io.inputstream.AesCipherInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

class AesCipherInputStream
extends CipherInputStream<AESDecrypter>

Field Summary

Fields

Modifier and Type	Field	Description
private byte[]	aes16ByteBlock
private int	aes16ByteBlockPointer
private int	aes16ByteBlockReadLength
private int	bytesCopiedInThisIteration
private int	lengthToCopyInThisIteration
private int	lengthToRead
private int	offsetWithAesBlock
private int	remainingAes16ByteBlockLength
private byte[]	singleByteBuffer

Constructor Summary

Constructors

Constructor	Description
AesCipherInputStream(ZipEntryInputStream zipEntryInputStream, LocalFileHeader localFileHeader, char[] password, int bufferSize, boolean useUtf8ForPassword)

Method Summary

Modifier and Type	Method	Description
private void	copyBytesFromBuffer(byte[] b, int off)
private void	decrementRemainingAesBytesLength(int decrementBy)
protected void	endOfEntryReached(InputStream inputStream, int numberOfBytesPushedBack)
private byte[]	getPasswordVerifier()
private byte[]	getSalt(LocalFileHeader localFileHeader)
private void	incrementAesByteBlockPointer(int incrementBy)
protected AESDecrypter	initializeDecrypter(LocalFileHeader localFileHeader, char[] password, boolean useUtf8ForPassword)
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
protected byte[]	readStoredMac(InputStream inputStream)
private void	verifyContent(byte[] storedMac, int numberOfBytesPushedBack)

Methods inherited from class CipherInputStream

close, getDecrypter, getLastReadRawDataCache, getLocalFileHeader, getNumberOfBytesReadForThisEntry, readRaw

Methods inherited from class InputStream

available, mark, markSupported, reset, skip

Methods inherited from class Object

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

Field Details

singleByteBuffer

private byte[] singleByteBuffer

aes16ByteBlock

private byte[] aes16ByteBlock

aes16ByteBlockPointer

private int aes16ByteBlockPointer

remainingAes16ByteBlockLength

private int remainingAes16ByteBlockLength

lengthToRead

private int lengthToRead

offsetWithAesBlock

private int offsetWithAesBlock

bytesCopiedInThisIteration

private int bytesCopiedInThisIteration

lengthToCopyInThisIteration

private int lengthToCopyInThisIteration

aes16ByteBlockReadLength

private int aes16ByteBlockReadLength

Constructor Details

AesCipherInputStream

public AesCipherInputStream(ZipEntryInputStream zipEntryInputStream,
 LocalFileHeader localFileHeader,
 char[] password,
 int bufferSize,
 boolean useUtf8ForPassword)
                     throws IOException

Throws:

IOException

Method Details

initializeDecrypter

protected AESDecrypter initializeDecrypter(LocalFileHeader localFileHeader,
 char[] password,
 boolean useUtf8ForPassword)
                                    throws IOException

Specified by:

initializeDecrypter in class CipherInputStream<AESDecrypter>

Throws:

IOException

read

public int read()
         throws IOException

Overrides:

read in class CipherInputStream<AESDecrypter>

Throws:

IOException

read

public int read(byte[] b)
         throws IOException

Overrides:

read in class CipherInputStream<AESDecrypter>

Throws:

IOException

read

public int read(byte[] b,
 int off,
 int len)
         throws IOException

Overrides:

read in class CipherInputStream<AESDecrypter>

Throws:

IOException

copyBytesFromBuffer

private void copyBytesFromBuffer(byte[] b,
 int off)

endOfEntryReached

protected void endOfEntryReached(InputStream inputStream,
 int numberOfBytesPushedBack)
                          throws IOException

Overrides:

endOfEntryReached in class CipherInputStream<AESDecrypter>

Throws:

IOException

verifyContent

private void verifyContent(byte[] storedMac,
 int numberOfBytesPushedBack)
                    throws IOException

Throws:

IOException

readStoredMac

protected byte[] readStoredMac(InputStream inputStream)
                        throws IOException

Throws:

IOException

getSalt

private byte[] getSalt(LocalFileHeader localFileHeader)
                throws IOException

Throws:

IOException

getPasswordVerifier

private byte[] getPasswordVerifier()
                            throws IOException

Throws:

IOException

incrementAesByteBlockPointer

private void incrementAesByteBlockPointer(int incrementBy)

decrementRemainingAesBytesLength

private void decrementRemainingAesBytesLength(int decrementBy)