Class StandardHandlerUsingStandard40

java.lang.Object

com.itextpdf.kernel.crypto.securityhandler.SecurityHandler

com.itextpdf.kernel.crypto.securityhandler.StandardSecurityHandler

com.itextpdf.kernel.crypto.securityhandler.StandardHandlerUsingStandard40

Direct Known Subclasses:

StandardHandlerUsingStandard128

public class StandardHandlerUsingStandard40
extends StandardSecurityHandler

Field Summary

Fields

Modifier and Type	Field	Description
protected ARCFOUREncryption	arcfour
private static final int	DEFAULT_KEY_LENGTH
protected byte[]	documentId
protected int	keyLength
protected static final byte[]	metadataPad
protected static final byte[]	pad

Fields inherited from class StandardSecurityHandler

permissions, PERMS_MASK_1_FOR_REVISION_2, PERMS_MASK_1_FOR_REVISION_3_OR_GREATER, PERMS_MASK_2, usedOwnerPassword

Fields inherited from class SecurityHandler

extra, md5, mkey, nextObjectKey, nextObjectKeySize

Constructor Summary

Constructors

Constructor	Description
StandardHandlerUsingStandard40(PdfDictionary encryptionDictionary, byte[] password, byte[] documentId, boolean encryptMetadata)
StandardHandlerUsingStandard40(PdfDictionary encryptionDictionary, byte[] userPassword, byte[] ownerPassword, int permissions, boolean encryptMetadata, boolean embeddedFilesOnly, byte[] documentId)

Method Summary

Modifier and Type	Method	Description
protected void	calculatePermissions(int permissions)
private void	checkPassword(boolean encryptMetadata, byte[] uValue, byte[] oValue, byte[] paddedPassword)
protected void	computeGlobalEncryptionKey(byte[] userPad, byte[] ownerKey, boolean encryptMetadata)
protected byte[]	computeOwnerKey(byte[] userPad, byte[] ownerPad)
protected byte[]	computeUserKey()
byte[]	computeUserPassword(byte[] ownerPassword, PdfDictionary encryptionDictionary)
IDecryptor	getDecryptor()	Gets decryptor object.
OutputStreamEncryption	getEncryptionStream(OutputStream os)	Gets a stream wrapper, responsible for encryption.
private int	getKeyLength(PdfDictionary encryptionDict)
private void	initKeyAndFillDictionary(PdfDictionary encryptionDictionary, byte[] userPassword, byte[] ownerPassword, int permissions, boolean encryptMetadata, boolean embeddedFilesOnly, byte[] documentId)
private void	initKeyAndReadDictionary(PdfDictionary encryptionDictionary, byte[] password, byte[] documentId, boolean encryptMetadata)
protected boolean	isValidPassword(byte[] uValue, byte[] userKey)
private byte[]	padPassword(byte[] password)
protected void	setSpecificHandlerDicEntries(PdfDictionary encryptionDictionary, boolean encryptMetadata, boolean embeddedFilesOnly)

Methods inherited from class StandardSecurityHandler

equalsArray, generateOwnerPasswordIfNullOrEmpty, getIsoBytes, getPermissions, isUsedOwnerPassword, setPermissions, setStandardHandlerDicEntries

Methods inherited from class SecurityHandler

getMkey, getNextObjectKey, initMd5MessageDigest, setHashKeyForNextObject

Methods inherited from class Object

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

Field Details

pad

protected static final byte[] pad

metadataPad

protected static final byte[] metadataPad

documentId

protected byte[] documentId

keyLength

protected int keyLength

arcfour

protected ARCFOUREncryption arcfour

DEFAULT_KEY_LENGTH

private static final int DEFAULT_KEY_LENGTH

See Also:

• Constant Field Values

Constructor Details

StandardHandlerUsingStandard40

public StandardHandlerUsingStandard40(PdfDictionary encryptionDictionary,
 byte[] userPassword,
 byte[] ownerPassword,
 int permissions,
 boolean encryptMetadata,
 boolean embeddedFilesOnly,
 byte[] documentId)

StandardHandlerUsingStandard40

public StandardHandlerUsingStandard40(PdfDictionary encryptionDictionary,
 byte[] password,
 byte[] documentId,
 boolean encryptMetadata)

Method Details

getEncryptionStream

public OutputStreamEncryption getEncryptionStream(OutputStream os)

Description copied from class: SecurityHandler

Gets a stream wrapper, responsible for encryption.

Specified by:

getEncryptionStream in class SecurityHandler

Parameters:

os - OutputStream to be wrapped

Returns:

OutputStreamEncryption, responsible for encryption.

getDecryptor

public IDecryptor getDecryptor()

Description copied from class: SecurityHandler

Gets decryptor object.

Specified by:

getDecryptor in class SecurityHandler

Returns:

IDecryptor

computeUserPassword

public byte[] computeUserPassword(byte[] ownerPassword,
 PdfDictionary encryptionDictionary)

calculatePermissions

protected void calculatePermissions(int permissions)

computeOwnerKey

protected byte[] computeOwnerKey(byte[] userPad,
 byte[] ownerPad)

computeGlobalEncryptionKey

protected void computeGlobalEncryptionKey(byte[] userPad,
 byte[] ownerKey,
 boolean encryptMetadata)

computeUserKey

protected byte[] computeUserKey()

setSpecificHandlerDicEntries

protected void setSpecificHandlerDicEntries(PdfDictionary encryptionDictionary,
 boolean encryptMetadata,
 boolean embeddedFilesOnly)

isValidPassword

protected boolean isValidPassword(byte[] uValue,
 byte[] userKey)

initKeyAndFillDictionary

private void initKeyAndFillDictionary(PdfDictionary encryptionDictionary,
 byte[] userPassword,
 byte[] ownerPassword,
 int permissions,
 boolean encryptMetadata,
 boolean embeddedFilesOnly,
 byte[] documentId)

initKeyAndReadDictionary

private void initKeyAndReadDictionary(PdfDictionary encryptionDictionary,
 byte[] password,
 byte[] documentId,
 boolean encryptMetadata)

checkPassword

private void checkPassword(boolean encryptMetadata,
 byte[] uValue,
 byte[] oValue,
 byte[] paddedPassword)

padPassword

private byte[] padPassword(byte[] password)

getKeyLength

private int getKeyLength(PdfDictionary encryptionDict)