Package com.itextpdf.kernel.crypto.securityhandler

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 int	DEFAULT_KEY_LENGTH
protected byte[]	documentId
protected int	keyLength
protected static byte[]	metadataPad
protected static byte[]	pad

Fields inherited from class com.itextpdf.kernel.crypto.securityhandler.StandardSecurityHandler

permissions, PERMS_MASK_1_FOR_REVISION_2, PERMS_MASK_1_FOR_REVISION_3_OR_GREATER, PERMS_MASK_2, usedOwnerPassword

Fields inherited from class com.itextpdf.kernel.crypto.securityhandler.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(java.io.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 com.itextpdf.kernel.crypto.securityhandler.StandardSecurityHandler

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

Methods inherited from class com.itextpdf.kernel.crypto.securityhandler.SecurityHandler

getMkey, getNextObjectKey, initMd5MessageDigest, setHashKeyForNextObject

Methods inherited from class java.lang.Object

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

Field Detail

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 Detail

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 Detail

getEncryptionStream

public OutputStreamEncryption getEncryptionStream(java.io.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)