com.itextpdf.kernel.crypto.securityhandler

Class StandardHandlerUsingAes256

java.lang.Object

com.itextpdf.kernel.crypto.securityhandler.SecurityHandler

com.itextpdf.kernel.crypto.securityhandler.StandardSecurityHandler

com.itextpdf.kernel.crypto.securityhandler.StandardHandlerUsingAes256

Direct Known Subclasses:

StandardHandlerUsingAesGcm

public class StandardHandlerUsingAes256
extends StandardSecurityHandler

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	encryptMetadata

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 and Description
StandardHandlerUsingAes256(PdfDictionary encryptionDictionary, byte[] password)
StandardHandlerUsingAes256(PdfDictionary encryptionDictionary, byte[] userPassword, byte[] ownerPassword, int permissions, boolean encryptMetadata, boolean embeddedFilesOnly, PdfVersion version)

Method Summary

Modifier and Type	Method and Description
IDecryptor	getDecryptor() Gets decryptor object.
OutputStreamEncryption	getEncryptionStream(OutputStream os) Gets a stream wrapper, responsible for encryption.
protected void	initMd5MessageDigest() Init md5 message digest.
boolean	isEncryptMetadata() Checks whether the document-level metadata stream will be encrypted.
void	setHashKeyForNextObject(int objNumber, int objGeneration) Note: For most of the supported security handlers algorithm to calculate encryption key for particular object is the same.
void	setPermissions(int permissions, PdfDictionary encryptionDictionary) Updates encryption dictionary with the security permissions provided.

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

equalsArray, generateOwnerPasswordIfNullOrEmpty, getIsoBytes, getPermissions, isUsedOwnerPassword, setStandardHandlerDicEntries

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

getMkey, getNextObjectKey

Methods inherited from class java.lang.Object

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

Field Detail

encryptMetadata

protected boolean encryptMetadata

Constructor Detail

StandardHandlerUsingAes256

public StandardHandlerUsingAes256(PdfDictionary encryptionDictionary,
                                  byte[] userPassword,
                                  byte[] ownerPassword,
                                  int permissions,
                                  boolean encryptMetadata,
                                  boolean embeddedFilesOnly,
                                  PdfVersion version)

StandardHandlerUsingAes256

public StandardHandlerUsingAes256(PdfDictionary encryptionDictionary,
                                  byte[] password)

Method Detail

isEncryptMetadata

public boolean isEncryptMetadata()

Checks whether the document-level metadata stream will be encrypted.

Returns:

true if the document-level metadata stream shall be encrypted, false otherwise

setHashKeyForNextObject

public void setHashKeyForNextObject(int objNumber,
                                    int objGeneration)

Description copied from class: SecurityHandler

Note: For most of the supported security handlers algorithm to calculate encryption key for particular object is the same.

Overrides:

setHashKeyForNextObject in class SecurityHandler

Parameters:

objNumber - number of particular object for encryption

objGeneration - generation of particular object for encryption

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

setPermissions

public void setPermissions(int permissions,
                           PdfDictionary encryptionDictionary)

Updates encryption dictionary with the security permissions provided.

Overrides:

setPermissions in class StandardSecurityHandler

Parameters:

permissions - new permissions to set

encryptionDictionary - encryption dictionary to update

initMd5MessageDigest

protected void initMd5MessageDigest()

Init md5 message digest.

Overrides:

initMd5MessageDigest in class SecurityHandler