Package net.lingala.zip4j.crypto

Class AESDecrypter

java.lang.Object

net.lingala.zip4j.crypto.AESDecrypter

All Implemented Interfaces:

Decrypter

public class AESDecrypter
extends java.lang.Object
implements Decrypter

AES Decrypter supports AE-1 and AE-2 decryption for AES-CTR with 128, 192, or 256 Key Strength

Field Summary

Fields

Modifier and Type	Field	Description
private AESEngine	aesEngine
private byte[]	counterBlock
private byte[]	iv
private MacBasedPRF	mac
private int	nonce

Constructor Summary

Constructors

Constructor	Description
AESDecrypter(AESExtraDataRecord aesExtraDataRecord, char[] password, byte[] salt, byte[] passwordVerifier, boolean useUtf8ForPassword)

Method Summary

Modifier and Type	Method	Description
int	decryptData(byte[] buff, int start, int len)
byte[]	getCalculatedAuthenticationBytes(int numberOfBytesPushedBack)
private void	init(byte[] salt, byte[] passwordVerifier, char[] password, AESExtraDataRecord aesExtraDataRecord, boolean useUtf8ForPassword)

Methods inherited from class java.lang.Object

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

Field Detail

aesEngine

private AESEngine aesEngine

mac

private MacBasedPRF mac

nonce

private int nonce

iv

private byte[] iv

counterBlock

private byte[] counterBlock

Constructor Detail

AESDecrypter

public AESDecrypter(AESExtraDataRecord aesExtraDataRecord,
                    char[] password,
                    byte[] salt,
                    byte[] passwordVerifier,
                    boolean useUtf8ForPassword)
             throws ZipException

Throws:

ZipException

Method Detail

init

private void init(byte[] salt,
                  byte[] passwordVerifier,
                  char[] password,
                  AESExtraDataRecord aesExtraDataRecord,
                  boolean useUtf8ForPassword)
           throws ZipException

Throws:

ZipException

decryptData

public int decryptData(byte[] buff,
                       int start,
                       int len)
                throws ZipException

Specified by:

decryptData in interface Decrypter

Throws:

ZipException

getCalculatedAuthenticationBytes

public byte[] getCalculatedAuthenticationBytes(int numberOfBytesPushedBack)