Module org.sejda.sambox

Package org.sejda.sambox.encryption

Class Algorithm1

java.lang.Object

org.sejda.sambox.encryption.Algorithm1

All Implemented Interfaces:

COSVisitor, GeneralEncryptionAlgorithm

class Algorithm1
extends Object
implements GeneralEncryptionAlgorithm

Algorithm 1 defined in Chapter 7.6.2 (General Encryption Algorithm) PDF 32100-1:2008

Field Summary

Fields

Modifier and Type	Field	Description
private static final byte[]	AES_SALT
private COSObjectKey	currentCOSObjectKey
private final MessageDigest	digest
private final EncryptionAlgorithmEngine	engine
private final Function<COSObjectKey,byte[]>	keyCalculator
private Function<byte[],byte[]>	md5Initializer
private final Function<byte[],byte[]>	md5ToKey

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Algorithm1(EncryptionAlgorithmEngine engine, byte[] key)

Method Summary

Modifier and Type	Method	Description
private void	requireObjectKey()
void	setCurrentCOSObjectKey(COSObjectKey currentCOSObjectKey)	Sets the current object and generation numbers
String	toString()
void	visit(COSStream value)
void	visit(COSString value)
(package private) static Algorithm1	withAESEngine(byte[] key)	Factory method for an Algorithm1 with an AESEngine
(package private) static Algorithm1	withARC4Engine(byte[] key)	Factory method for an Algorithm1 with an ARC4Engine

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.sejda.sambox.cos.COSVisitor

visit, visit, visit, visit, visit, visit, visit, visit, visit

Field Details

AES_SALT

private static final byte[] AES_SALT

engine

private final EncryptionAlgorithmEngine engine

digest

private final MessageDigest digest

keyCalculator

private final Function<COSObjectKey,byte[]> keyCalculator

md5Initializer

private Function<byte[],byte[]> md5Initializer

md5ToKey

private final Function<byte[],byte[]> md5ToKey

currentCOSObjectKey

private COSObjectKey currentCOSObjectKey

Constructor Details

Algorithm1

private Algorithm1(EncryptionAlgorithmEngine engine,
 byte[] key)

Method Details

setCurrentCOSObjectKey

public void setCurrentCOSObjectKey(COSObjectKey currentCOSObjectKey)

Description copied from interface: GeneralEncryptionAlgorithm

Sets the current object and generation numbers

Specified by:

setCurrentCOSObjectKey in interface GeneralEncryptionAlgorithm

visit

public void visit(COSString value)

Specified by:

visit in interface COSVisitor

visit

public void visit(COSStream value)

Specified by:

visit in interface COSVisitor

requireObjectKey

private void requireObjectKey()

toString

public String toString()

Overrides:

toString in class Object

withAESEngine

static Algorithm1 withAESEngine(byte[] key)

Factory method for an Algorithm1 with an AESEngine

Parameters:

key -

Returns:

withARC4Engine

static Algorithm1 withARC4Engine(byte[] key)

Factory method for an Algorithm1 with an ARC4Engine

Parameters:

key -

Returns: